阅读说明：本技术 玻璃、玻璃的成型方法、压制装置及压延机 (Glass, glass forming method, pressing device and calender ) 是由 单晓义 于 2020-09-06 设计创作，主要内容包括：本申请涉及一种玻璃、玻璃成型方法和压制装置及压延机。其中,玻璃通过压延成型方法制成；玻璃的原料包括SiO-2、Li-2O、Na-2O、CaO、MgO、Al-2O-3以及TiO-2+ZrO-2；压制装置包括两个相对设置的压制机构,压制机构包括基座、横梁、压杆、立柱和驱动机构,立柱和驱动机构安装在基座上,压杆的第一端、立柱远离基座的一端和驱动机构远离基座的一端均枢接在横梁上,立柱位于压杆和驱动机构之间；压延机包括上述的压制机构。本申请的玻璃具有较好的性能以及较高的机械强度。(The application relates to glass, a glass forming method, a pressing device and a calender. Wherein, the glass is made by a calendaring molding method; the raw material of the glass comprises SiO 2 、Li 2 O、Na 2 O、CaO、MgO、Al 2 O 3 And TiO 2 +ZrO 2 (ii) a The pressing device comprises two opposite pressing mechanisms, each pressing mechanism comprises a base, a beam, a pressing rod, an upright post and a driving mechanism, the upright post and the driving mechanism are mounted on the base, the first end of the pressing rod, the end of the upright post, far away from the base, and the end of the driving mechanism, far away from the base are all pivoted on the beam, and the upright post is positioned between the pressing rod and the driving mechanism; the calender comprises the pressing mechanism. The glass has better performance and higher mechanical strength.)

1. The glass is characterized by comprising the following raw materials in parts by weight: 61-76 parts of SiO2, Li 2O: 6 to 10 parts of Na₂O: 2-12 parts of CaO, 5-0 parts of MgO: 5 to 0 parts of Al₂O₃16 to 0 parts of TiO and₂+ZrO₂: 5-2 parts.

2. The glass according to claim 1, wherein the glass comprises the following raw materials in parts by weight: SiO2₂: 76 parts of Li₂O: 10 parts of Na₂O: 12 parts and TiO₂+ZrO₂: and 2 parts.

3. The glass according to claim 1, wherein the glass comprises the following raw materials in parts by weight: SiO2₂:61 parts of Li₂O: 6 parts of Na₂O: 2 parts of CaO:5 portions of,MgO: 5 parts of Al2O₃16 parts of; TiO 2₂+ZrO₂:5 parts of the raw materials.

4. The glass according to claim 1, wherein the glass comprises the following raw materials in parts by weight: SiO2₂: 70 parts of Li₂O: 8 parts of Na₂O: 10 parts of CaO: 1.5 parts, MgO: 1.5 parts of Al₂O₃:5 parts and TiO₂+ZrO₂: 4 parts.

5. A method of forming glass, wherein the glass according to any one of claims 1 to 4 is produced by the method of forming glass, the method of forming glass comprising:

batching raw materials for preparing the glass to obtain raw materials for preparing the glass;

processing the raw materials of the glass to obtain molten glass;

processing the molten glass by a rolling method to obtain amorphous glass;

processing the amorphous glass to obtain crystalline glass;

and polishing the crystalline glass to obtain the formed glass.

6. The method of claim 5, wherein the processing the glass in the amorphous state to obtain the glass in the crystalline state comprises:

processing the amorphous glass through an annealing process to obtain the glass in a transition state;

crystallizing the glass in the transition state to obtain the crystalline glass;

cutting the crystalline glass to obtain a regular shape of the crystalline glass; or the like, or, alternatively,

processing the amorphous glass through an annealing process to obtain the glass in a transition state;

cutting the glass in the transition state to obtain a regular shape of the glass in the transition state;

crystallizing the cut transitional glass to obtain the crystalline glass;

wherein the glass in the transition state is the glass after the amorphous state and before the crystalline state.

7. The method of claim 6, wherein the crystallizing comprises in-line crystallizing or off-line crystallizing.

8. The method for forming glass according to any one of claims 5 to 7, further comprising, after the polishing the crystalline glass to obtain the formed glass:

and chemically toughening the formed glass.

9. A pressing device used in the forming method according to any one of claims 5 to 8 for processing the glass in the molten state to obtain the amorphous glass, wherein the pressing device comprises two oppositely arranged pressing mechanisms, each pressing mechanism comprises a base, a beam, a pressing rod, an upright post and a driving mechanism, the upright post and the driving mechanism are both mounted on the base, a first end of the pressing rod, one end of the upright post far away from the base and one end of the driving mechanism far away from the base are all pivoted on the beam, and the upright post is positioned between the pressing rod and the driving mechanism.

10. The press apparatus according to claim 9, wherein the drive mechanism includes a motor reducer and a turbine lift reducer, the motor reducer being connected to an input shaft of the turbine lift reducer by a coupling.

11. The compaction device of claim 9 wherein the drive mechanism comprises a hand wheel and a turbine lift reducer, the hand wheel being rotationally coupled to an input shaft of the turbine lift reducer by a locating pin.

12. A press device as claimed in claim 9, wherein the drive mechanism is a mechanical jack.

13. The hold-down device according to any one of claims 10 to 12, wherein the press rod comprises an upper press rod and a press rod head, a first end of the upper press rod is pivoted on the cross beam, and a second end of the upper press rod is in threaded connection with the press rod head.

14. The press apparatus of claim 10, further comprising a pressure sensor, a first end of the pressure sensor being coupled to the drive mechanism and a second end of the pressure sensor being pivotally coupled to the cross member.

15. The pressing device according to claim 14, further comprising a limit switch disposed on the upright, the limit switch having a first contact point capable of abutting against the first end surface of the pressure sensor and a second contact point capable of abutting against the second end surface of the pressure sensor.

16. A calender, which is characterized by comprising a calender body, an upper calendering main roller, a lower calendering main roller and the pressing device as recited in any one of claims 9 to 15, wherein the upper calendering main roller and the lower calendering main roller are oppositely arranged on the calender body, the distribution directions of the upper calendering main roller and the lower calendering main roller are consistent with the longitudinal direction of the calender body, and the molten glass can be positioned between the upper calendering main roller and the lower calendering main roller; the pressing device is arranged on the calender body, and the second end of the pressing rod can be pressed on the upper main roller of the calender.

17. The calender of claim 16 wherein the calender body comprises a first body and a second body, the second body having a table above the first body, the upper calender main roll and the lower calender main roll are both disposed on the first body, the pressing device is disposed on the table, and the pressure bar is disposed through the table.

18. The calender according to claim 16 or 17, further comprising an upper calender main roller motor, a lower calender main roller motor, an electric control cabinet and a touch screen, wherein a motor shaft of the upper calender main roller motor is connected with the upper calender main roller, a motor shaft of the lower calender main roller motor is connected with the lower calender main roller, the electric control cabinet and the touch screen are both arranged on the calender body, and the upper calender main roller motor, the lower calender main roller motor and the touch screen are all electrically connected with the electric control cabinet.

Technical Field

The application relates to the field of glass forming, in particular to glass, a glass forming method, a pressing device and a calender.

Background

Both appearance protective glass and window protective glass for electronic products generally need to have the properties of high strength, wear resistance, scratch resistance, falling resistance, high optical definition, sensitivity and accuracy to touch, and the like.

The production of the appearance protective glass and the window protective glass of the existing electronic product can be divided into a float forming method (abbreviated as a floating method), an overflow down-drawing method (abbreviated as an overflow method), a secondary drawing method, a slit method and a secondary polishing method according to different forming processes. The float forming method and the overflow downdraw method are two main methods. In order to improve the indexes of strength, hardness and the like of the glass surface, alumina oxide which is higher than the conventional glass component is added in the glass formula of the float forming method and the overflow down-draw method. The content of the alumina in the float forming method is more than 3.5 percent, and the content of the alumina in the overflow downdraw method is more than 15 percent. Due to different alumina contents, the high-alumina-silica glass produced by the float forming method has performance indexes such as scratch resistance, drop resistance, warping degree and the like which are not similar to those of the glass produced by the overflow down-draw method, so that high-end touch products are mainly occupied by the glass produced by the overflow down-draw method.

The overflow downdraw process is one of the basic techniques for the production of sheet glass and is also the most mature technique for the production of ultra-thin glass.

The process of the overflow downdraw method comprises the following steps: the tank furnace melts the glass raw material into molten glass, and then the molten glass is cooled through a clarification section and a homogenization section of a platinum channel, the molten glass horizontally flows into an overflow brick through an L-shaped pipe made of platinum, a molten glass collecting tank (overflow tank) is arranged at the upper part of the overflow brick, and the molten glass can overflow from two sides of the top of the tank after the overflow tank is full. Under the action of gravity, the glass flows downwards along the outer surface of the overflow brick to form two pieces of glass, and finally the glass is combined into a single piece of glass below the overflow brick. In addition, because the glass liquid overflows to the outside of the overflow groove without the restriction of a mold, the distribution uniformity (overflow speed) of the glass liquid on the weir of the overflow brick is difficult to be consistent, and the thickness uniformity of the glass plate is influenced.

Meanwhile, the overflow downdraw method has the strictest requirements on the melting clarification and homogenization of the glass metal, in order to achieve the accurate control of the temperature of the glass metal, each production line consumes 800-1000 kg of platinum to form a long glass channel, the temperature of the glass metal is adjusted by electrically heating the platinum channel, and the precious metals are oxidized and continuously volatilized, so that the production line manufacturing cost is very high by the method.

In addition, the raw material components required for the melting of molten glass compatible with the above-described overflow production process are usually high-aluminosilicate or high-aluminoborosilicate in which Al is present₂O₃The weight percentage in the glass is usually not less than15％。

The float process is carried out by floating molten glass on the surface of metallic tin filled with protective gas after the molten glass continuously flows out from melting furnace to form glass band with uniform thickness and smooth surface, and annealing. Because the surface quality of the glass on the side contacting with the tin liquid is not as good as that of the overflow process, grinding and polishing equipment needs to be additionally arranged in the float forming process, and the cost is higher. When the float process draws glass with the thickness less than 1.0mm, the float process thins the glass to the required thickness from the free thickness of 6.0mm, only can rely on an edge roller to apply transverse thinning tension, and the required external force is very large, the very long length of a thinning area needs to be provided with a large number of edge rollers, because the edge roller can only apply the external force on a single surface, the effect is worse than that of a roller edge roller, and the difference value between the thickness of a glass belt outside an indentation of the edge roller and the thickness of a qualified plate is further increased along with the thinning of the glass, so that the local stress concentration of an edge part is easily formed. Meanwhile, in the forming stage of the float forming method, the surface of molten tin is drawn into a glass plate with the required plate width and thickness by using an edge roller in a forming tin bath, and the forming temperature in the interval is generally 830-920 degrees due to the forming of the edge roller, and the corresponding viscosity is 10 degrees⁶Pa·S～10⁵Pa · S, if the molding temperature is too high or the viscosity is not properly controlled, the molding cannot be performed.

The float forming method makes the produced glass have poor performance indexes such as thickness uniformity, waviness and the like.

Appearance protective glass and window protective glass of electronic products can be classified into soda-lime silicate glass and high aluminosilicate glass according to different production formulas. The commonly used high performance is high aluminosilicate glass, mainly SiO₂-Al₂O₃-RO-R₂O system, composition of SiO₂The glass network forming body oxide can improve the breaking strength, chemical stability and thermal stability of glass, but is a substance which is difficult to melt; al (Al)₂O₃The content of Al is more than 15%₂O₃The mechanical strength of the glass can be greatly improved in the glass, but the content of Al is high in the melting process₂O₃Adhesion to glassDegree greater than SiO₂The effect on the viscosity of the glass is that the melting speed of the glass is slowed down and the fining time is prolonged; the content of RO in the glass component is usually more than 12 percent, and the increase of RO alkaline earth metal oxide can cause the reduction of elastic modulus and breaking strength; r₂The content of O in the glass component is usually 13% or more, and R is₂The increase in the amount of the O alkaline earth metal oxide also results in a decrease in the elastic modulus and the flexural strength.

Therefore, Al can meet the melting and forming requirements during the process operation₂O₃RO and R₂The mass component of O should be minimized. Therefore, a novel glass ingredient is found, which can improve the elastic modulus and the bending strength of the cover plate glass and can also improve the mechanical strength of the glass.

In order to solve the problems that the overflow downdraw method has overhigh cost when manufacturing the glass, the product produced by the float forming method has poor thickness uniformity and waviness index and narrow forming temperature range, and Al in the mixture ratio of the glass raw materials₂O₃、RO、R₂The application provides a novel glass forming method.

The calender set structure widely applied in the market at present generally comprises a calender body, an upper calendering main roller, a lower calendering main roller, a rocker arm, a screw rod reducer and a mechanical pressure device, wherein the upper calendering main roller and the lower calendering main roller are both arranged on the calender body, the arrangement direction of the upper calendering main roller and the lower calendering main roller is consistent with the longitudinal direction of the calender body, the rocker arm is pivoted on the calender body, one end of the rocker arm is connected with the upper calendering main roller, the screw rod reducer is arranged at the other end of the rocker arm, the mechanical pressure device is arranged on the calender body, the mechanical pressure device is positioned above the upper calendering main roller, specifically, when glass needs to be pressed, the gap between the upper calendering main roller and the lower calendering main roller is firstly adjusted to enable the glass to be positioned in the gap, and the screw rod drives the rocker arm to rotate at a certain angle by enabling the screw rod reducer to work, thereby realizing the up and down movement of the upper main roller of the rolling, and the clearance is smaller when the produced glass is thinner. However, during normal production, as the high-temperature liquid glass liquid is squeezed between the upper rolling main roller and the lower rolling main roller, the upper rolling main roller can be subjected to great buoyancy, and the thinner the produced glass is, the greater the buoyancy is, therefore, a certain downward pressure must be applied to the upper rolling main roller through a mechanical pressure device to overcome the upward buoyancy generated by the glass to the upper rolling main roller. It should be noted that the downward pressure is mainly to overcome the buoyancy generated by the molten glass between the upper rolling main roll and the lower rolling main roll to the upper rolling main roll, and the thinner the produced glass is, the greater the applied pressure is, for example, 5000N to 10000N is required when producing 3.2mm glass; when the glass with the thickness of 2.5mm is produced, the pressure of 16000N-28000N is needed; when producing 2.0mm glass, a pressure of 42000N to 63000N is required.

Therefore, the defects of the calender unit structure mainly comprise two points, the first point is that operators need to pay large physical labor, and the operators are easily radiated by the heat of the high-temperature molten glass in the open area in front of the calender roll, so that the operators have high operation difficulty; the second point is that the pressure applied to the upper main roller of the rolling mill is manually adjusted, and because the manually applied force is too small (generally less than 28000N), the production of conventional glass (not less than 2.5mm) with thicker thickness can be met, but the production of glass (less than 2.5mm) with thinner thickness cannot be met.

The conventional thickness of the existing glass is thinner, the production and manufacturing method mainly adopts a float forming method and an overflow downdraw method, and the glass produced by the two methods has poor performance and low mechanical strength; meanwhile, a calender used in the conventional calendering method cannot be used for pressing glass with a relatively thin thickness, and the produced glass has poor performance and low mechanical strength.

Disclosure of Invention

The application aims to provide glass, a glass forming method, a pressing device and a calender, so that the manufactured glass has good performance and high mechanical strength.

In a first aspect, the present application provides a glass, comprising, in parts by weight: SiO2₂61-76 parts of Li₂O: 6 to 10 parts of Na₂O: 2-12 parts of CaO, 5-0 parts of MgO: 5 to 0 parts of Al₂O₃16 to 0 parts of TiO and₂+ZrO₂: 5-2 parts.

As an optional implementation mode, the glass comprises the following raw materials in parts by weight: SiO2₂: 76 parts of Li₂O: 10 parts of Na₂O: 12 parts and TiO₂+ZrO₂: and 2 parts.

As an optional implementation mode, the glass comprises the following raw materials in parts by weight: SiO2₂:61 parts of Li₂O: 6 parts of Na₂O: 2 parts of CaO:5 parts of MgO: 5 parts of Al2O₃16 parts by weight of TiO₂+ZrO₂:5 parts of the raw materials.

As an optional implementation mode, the glass comprises the following raw materials in parts by weight: SiO2₂: 70 parts of Li₂O: 8 parts of Na₂O: 10 parts of CaO: 1.5 parts, MgO: 1.5 parts of Al₂O₃:5 parts and TiO₂+ZrO₂: 4 parts.

In a second aspect, the present application provides a method of forming glass, the glass being formed by the method of forming glass, the method of forming glass comprising:

batching raw materials for preparing glass to obtain raw materials for preparing the glass;

processing raw materials of glass to obtain molten glass;

pressing the molten glass by a rolling method to obtain amorphous glass;

processing the amorphous glass to obtain crystalline glass;

and polishing the crystalline glass to obtain the formed glass.

As an alternative embodiment, processing an amorphous glass to obtain a crystalline glass comprises:

processing the amorphous glass through an annealing process to obtain glass in a transition state;

crystallizing the glass in the transition state to obtain crystalline glass;

cutting the crystalline glass to obtain a regular shape of the crystalline glass; or the like, or, alternatively,

processing the amorphous glass through an annealing process to obtain glass in a transition state;

cutting the glass in the transition state to obtain a regular shape of the glass in the transition state;

crystallizing the cut transitional glass to obtain crystalline glass;

wherein the glass in the transition state is the glass after the amorphous state and before the crystalline state.

As an alternative embodiment, the crystallization comprises in-line crystallization or off-line crystallization.

As an alternative embodiment, after polishing the crystalline glass to obtain the shaped glass, the method further comprises:

and chemically toughening the formed glass.

In a third aspect, the present application provides a pressing apparatus, in the above-mentioned forming method, configured to process molten glass to obtain amorphous glass, the pressing apparatus provided in the present application includes two pressing mechanisms disposed oppositely, each pressing mechanism includes a base, a beam, a pressing rod, an upright column and a driving mechanism, the upright column and the driving mechanism are both mounted on the base, a first end of the pressing rod, an end of the upright column away from the base, and an end of the driving mechanism away from the base are both pivotally connected to the beam, and the upright column is located between the pressing rod and the driving mechanism.

As an alternative embodiment, the driving mechanism includes a motor reducer and a turbine lifting reducer, and the motor reducer is connected with an input shaft of the turbine lifting reducer through a coupling.

As an alternative embodiment, the driving mechanism comprises a hand wheel and a turbine lifting speed reducer, and the hand wheel is rotatably connected with an input shaft of the turbine lifting speed reducer through a positioning pin.

As an alternative embodiment, the drive mechanism is a mechanical jack.

As an optional implementation manner, the pressing rod includes an upper pressing rod and a pressing rod head, a first end of the upper pressing rod is pivoted on the cross beam, and a second end of the upper pressing rod is in threaded connection with the pressing rod head.

As an alternative embodiment, the pressing device provided by the present application further includes a pressure sensor, a first end of the pressure sensor is connected to the driving mechanism, and a second end of the pressure sensor is pivotally connected to the cross beam.

As an optional implementation manner, the pressing device provided by the present application further includes a limit switch, the limit switch is disposed on the pillar, the limit switch has a first contact point and a second contact point, the first contact point can abut against the first end surface of the pressure sensor, and the second contact point can abut against the second end surface of the pressure sensor.

In a fourth aspect, the application provides a calender, which comprises a calender body, an upper calendering main roller, a lower calendering main roller and the pressing device, wherein the upper calendering main roller and the lower calendering main roller are oppositely arranged on the calender body, the distribution directions of the upper calendering main roller and the lower calendering main roller are consistent with the longitudinal direction of the calender body, and molten glass can be positioned between the upper calendering main roller and the lower calendering main roller; the pressing device is arranged on the calender body, and the second end of the pressing rod can be pressed on the upper main roller of the calender.

As an optional implementation mode, the calender body includes first body and second body, and the second body has the workstation, and the workstation is located the top of first body, and the main roll all sets up on first body under calendering upper main roll and the calendering, and the suppression device sets up on the workstation, and the depression bar wears to locate the workstation.

As an optional implementation mode, the automatic calender further comprises an upper calender main roller motor, a lower calender main roller motor, an electric control cabinet and a touch screen, wherein a motor shaft of the upper calender main roller motor is connected with the upper calender main roller, a motor shaft of the lower calender main roller motor is connected with the lower calender main roller, the electric control cabinet and the touch screen are both arranged on the calender body, and the upper calender main roller motor, the lower calender main roller motor and the touch screen are all electrically connected with the electric control cabinet.

In the glass, the glass forming method, the pressing device and the calender, the glass comprises the following raw materials in parts by weight: SiO2₂61-76 parts of Li₂O: 6 to 10 parts of Na₂O: 2-12 parts of CaO, 5-0 parts of MgO: 5 to 0 parts of Al₂O₃16 to 0 parts of TiO and₂+ZrO₂: 5-2 parts. Therefore, the glass provided by the application has better performance and higher mechanical strength.

The invention has the beneficial effects that:

1. the invention provides a new glass component design, namely high-lithium aluminum silicon glass, aiming at the existing high-aluminum silicon glass. I.e. incorporation of Li in the glass composition₂O oxide to partially or fully replace RO and partially replace Al₂O₃、R₂And (3) O oxide. Aiming at improving the flexural strength and the elastic modulus of the glass, the mechanical strength is further improved. At the same time, due to Li₂O ion radius greater than RO and R₂O, the transmittance of the glass is significantly increased, and the optical clarity of the glass becomes higher.

The present application provides more flexibility in formulating ingredients to achieve their unique performance advantages. Using Li with a larger ionic radius₂O to replace Na partially or completely₂One or more of O, CaO and MgO oxide components to greatly improve the mechanical property.

2. The invention provides a novel method for producing and forming transparent cover plate glass, namely a rolling method. The method can try out glass ingredients with different components, has wide forming temperature range and low input cost of forming equipment, thus obtaining the manufacturing advantage of low cost and obtaining glass products with high mechanical strength.

Compared with the high-cost manufacturing method of the overflow method forming and the high-cost investment of the tin bath and the tin liquor in the float forming method, the manufacturing cost of the rolling method can be reduced by at least more than 50 percent of the capital investment of the two forming methods. Compared with the forming characteristics of float forming, the calendering forming method has the advantages that the material formula proportion used by the calendering method is more flexible (oxide components such as CaO, MgO and the like can not be used) because the calendering forming method is not easily restricted by viscosity, the calendering method has a wide forming temperature range and can be carried out in a wide temperature range of 1160-1400 ℃, and the unique advantages enable the forming method to obtain glass sheets with higher mechanical properties and the like more easily.

3. The most obvious difference in the glass manufacturing process is that a novel calendaring forming process is adopted to replace the traditional overflow process and the float process, and meanwhile, the crystallization process is added. Basically, the method comprises the following steps: raw material preparation → melting in a melting furnace → rolling method molding → annealing crystallization → cutting → polishing → warehousing, and finally optionally carrying out chemical toughening. The following manufacturing process can also be adopted: raw material preparation → melting in a melting furnace → rolling method molding → annealing → cutting → online or offline crystallization → polishing → warehousing, and finally optionally carrying out chemical tempering.

4. The application of glass thickness suppression device can replace the manual rotating force claw of present stage operation workman to apply the mechanical force of pushing down for rolling the roller, when liberating the labour, can solve the manual operation applied force undersize of hand, can not reach the pressure of producing 2.0mm and following thickness glass.

5. The thickness pressing device for the rolling machine replaces manual rotating force claw application in the prior art, applied pressure is large, and the thickness of produced glass is usually between 0.3mm and 2.0 mm. Glass having a thickness greater than 2.0mm can also be produced.

6. The application provides a new production device for producing cover plate glass, a novel forming method, namely a rolling method, is provided through the rolling machine, a float method and an overflow pull-down method in the prior art can be replaced, the device input cost and the production manufacturing cost are low, and the produced cover plate glass has good performance indexes such as mechanical strength, waviness, transmittance and the like and high quality. The calendering method is free from Al in the glass component in the conventional float method and overflow method₂O₃And the influence of high process adjustment difficulty and low performance index caused by over-high RO content.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1a is a schematic diagram of a conventional overflow downdraw process;

FIG. 1b is a schematic view of a conventional overflow downdraw method for forming glass;

FIG. 2 is a schematic view of a prior art float process for making glass;

FIG. 3a is a broken line statistical graph showing the variation of the elastic modulus and the breaking strength of the conventional glass with the RO content;

FIG. 3b shows the modulus of elasticity and flexural strength of conventional glass as a function of R₂A polyline statistical graph of O content variation;

FIG. 4a is a schematic structural diagram of a conventional calender group;

FIG. 4b is a side view of FIG. 4 a;

FIG. 4c is an exploded view of a prior art calender stack configuration;

FIG. 5a is a schematic flow chart illustrating steps of a method for forming glass according to an embodiment of the present disclosure;

FIG. 5b is a schematic flow chart illustrating a process for processing amorphous glass to obtain crystalline glass in a method for forming glass according to an embodiment of the present disclosure;

FIG. 5c is a schematic flow chart illustrating another step of processing amorphous glass to obtain crystalline glass in a method for forming glass according to an embodiment of the present disclosure;

FIG. 6a is a schematic structural diagram of a pressing device according to an embodiment of the present disclosure;

FIG. 6b is a side view of FIG. 6 a;

fig. 7a is a schematic view of a first structure of a calender according to an embodiment of the present application;

FIG. 7b is a cross-sectional view taken along A-A of FIG. 7 a;

fig. 8a is a schematic view of a second structure of a calender according to an embodiment of the present application;

FIG. 8B is a cross-sectional view taken along line B-B of FIG. 8 a;

fig. 9a is a schematic structural view of a third calender provided in the embodiment of the present application;

FIG. 9b is a cross-sectional view taken along line C-C of FIG. 9 a;

fig. 10a is a schematic view of a fourth structure of a calender according to an embodiment of the present application;

FIG. 10b is a cross-sectional view taken along line D-D of FIG. 10 a;

fig. 11a is a schematic structural diagram of a fifth calender provided in an embodiment of the present application;

FIG. 11b is a side view of FIG. 11 a;

fig. 12a is a schematic view of a sixth structure of a calender according to an embodiment of the present application;

FIG. 12b is a side view of FIG. 12 a;

fig. 13a is a schematic structural diagram of a seventh calender provided in the embodiment of the present application;

fig. 13b is a side view of fig. 13 a.

Description of reference numerals:

1-tank furnace; 2-platinum channel; 21-a clarification section; 22-homogenization section; 3-L pipe; 4-overflow brick; 41-an overflow trough; 5-melting furnace; 6. 60-calender body; 7. 70-calendering the upper main roller; 71-upper bearing bush cover; 8. 80-calendering the lower main roll; 9-a rocker arm; 10-screw rod speed reducer; 20-mechanical pressure means; 201-rotating force claw; 202-a pressure bar; 2021-putter head; 30-a pressing mechanism; 31-a base; 32-a cross beam; 33-a pressure bar; 331-upper pressure lever; 332-a plunger head; 34-upright column; 35-a drive mechanism; 351-motor reducer; 352-turbine lifting reducer; 40-a pressure sensor; 50-limit switch; 61-a first body; 62-a second body; 90-calendering the upper main roller motor; 100-rolling a lower main roller motor; 110-an electric control cabinet; 120-touch screen; 130-attached rollers; 140-a movable roller; 150-mechanical jack.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Both appearance protective glass and window protective glass for electronic products generally need to have the properties of high strength, wear resistance, scratch resistance, falling resistance, high optical definition, sensitivity and accuracy to touch, and the like.

The production of the appearance protective glass and the window protective glass of the existing electronic product can be divided into a float forming method (abbreviated as a floating method), an overflow down-drawing method (abbreviated as an overflow method), a secondary drawing method, a slit method and a secondary polishing method according to different forming processes. The float forming method and the overflow downdraw method are two main methods. In order to improve the indexes of strength, hardness and the like of the glass surface, alumina oxide which is higher than the conventional glass component is added in the glass formula of the float forming method and the overflow down-draw method. The content of the alumina in the float forming method is more than 3.5 percent, and the content of the alumina in the overflow downdraw method is more than 15 percent. Due to different alumina contents, the high-alumina-silica glass produced by the float forming method has performance indexes such as scratch resistance, drop resistance, warping degree and the like which are not similar to those of the glass produced by the overflow down-draw method, so that high-end touch products are mainly occupied by the glass produced by the overflow down-draw method.

The overflow downdraw process is one of the basic techniques for the production of sheet glass and is also the most mature technique for the production of ultra-thin glass.

FIG. 1a is a schematic diagram of a conventional overflow downdraw process. FIG. 1b is a schematic view of a conventional overflow downdraw method for forming glass.

As shown in fig. 1a and 1b, the process of the overflow downdraw process is: the tank furnace 1 melts glass raw materials into molten glass, the molten glass is cooled through a clarification section 21 and a homogenization section 22 of a platinum channel 2, the molten glass horizontally flows into an overflow brick 4 through an L-shaped pipe 3 made of platinum, a molten glass collecting tank (overflow tank 41) is arranged at the upper part of the overflow brick 4, and the molten glass overflows from two sides of the top of the tank after the overflow tank 41 is full. Under the action of gravity, the glass flows downwards along the outer surface of the overflow brick 4 to form two pieces of glass, and finally the glass is combined into a single piece of glass below the overflow brick 4.

In addition, because the glass liquid overflows to the outside of the overflow groove without the restriction of a mold, the distribution uniformity (overflow speed) of the glass liquid on the weir of the overflow brick is difficult to be consistent, and the thickness uniformity of the glass plate is influenced.

Meanwhile, the overflow downdraw method has the strictest requirements on the melting clarification and homogenization of the glass metal, in order to achieve the accurate control of the temperature of the glass metal, each production line consumes 800-1000 kg of platinum to form a long glass channel, the temperature of the glass metal is adjusted by electrically heating the platinum channel, and the precious metals are oxidized and continuously volatilized, so that the production line manufacturing cost is very high by the method.

In addition, the raw material components required for the melting of molten glass compatible with the above-described overflow production process are usually high-aluminosilicate or high-aluminoborosilicate in which Al is present₂O₃The weight percentage in the glass is usually more than or equal to 15 percent.

As shown in FIG. 2, the float molding method is a specific process in which a molten glass continuously flows out from a melting furnace 5, floats on a surface of metallic tin charged with a protective gas to form a glass ribbon having a uniform thickness and a flat surface, and is annealed. Because the surface quality of the glass on the side contacting with the tin liquid is not as good as that of the overflow process, grinding and polishing equipment needs to be additionally arranged in the float forming process, and the cost is higher. When the float process is used for drawing glass with the thickness less than 1.0mm, the float process needs to thin the glass from the free thickness of 6.0mm to the required thickness, only a pulling force for transverse thinning can be applied by an edge roller, the required external force is very large, the number of the edge rollers needs to be large when the length of a thinning area is very long, the effect is poorer than that of a roller type edge roller because the edge roller can only apply the external force on a single surface, and the thickness of a glass belt outside the indentation of the edge roller and the thickness of a qualified plate are differentThe difference in thickness is further increased as the thickness of the glass is reduced, and local stress concentration at the edge portion is easily formed. Meanwhile, in the forming stage of the float forming method, the surface of molten tin is drawn into a glass plate with the required plate width and thickness by using an edge roller in a forming tin bath, and the forming temperature in the interval is generally 830-920 degrees due to the forming of the edge roller, and the corresponding viscosity is 10 degrees⁶Pa·S～10⁵Pa · S, if the molding temperature is too high or the viscosity is not properly controlled, the molding cannot be performed.

The float process described above results in glass having poor performance indexes such as thickness uniformity and waviness.

FIG. 3a is a broken line statistical chart showing the variation of the elastic modulus and the breaking strength of the conventional glass with the RO content. FIG. 3b shows the modulus of elasticity and flexural strength of conventional glass as a function of R₂Polyline statistical graph of O content variation.

As shown in fig. 3a and 3b, appearance protective glass and window protective glass of electronic products are classified into soda-lime silicate glass and high aluminosilicate glass according to production formulations. The commonly used high performance is high aluminosilicate glass, mainly SiO₂-Al₂O₃-RO-R₂O system, composition of SiO₂The glass network forming body oxide can improve the breaking strength, chemical stability and thermal stability of glass, but is a substance which is difficult to melt; al (Al)₂O₃The content of Al is more than 15%₂O₃The mechanical strength of the glass can be greatly improved in the glass, but the content of Al is high in the melting process₂O₃Viscosity greater than SiO for glass₂The effect on the viscosity of the glass is that the melting speed of the glass is slowed down and the fining time is prolonged; the content of RO in the glass component is usually more than 12 percent, and the increase of RO alkaline earth metal oxide can cause the reduction of elastic modulus and breaking strength; r₂The content of O in the glass component is usually 13% or more, and R is₂The increase of the O alkaline earth metal oxide also causes the reduction of the elastic modulus and the flexural strength; wherein RO is generally an oxide such as MgO or CaO, R₂O is generally K₂O or Na₂O, and the like.

Therefore, Al can meet the melting and forming requirements during the process operation₂O₃RO and R₂The mass fraction of O should be minimized or not added. Therefore, a novel glass ingredient is searched, so that the elastic modulus and the bending strength of the cover plate glass can be improved, and the mechanical strength of the glass can be improved.

In order to solve the problem of high cost of the glass in the overflow down-drawing method, the problems of poor thickness uniformity and waviness index and narrow forming temperature range of products produced by a float forming method and Al in the glass raw material proportion₂O₃、RO、R₂The application provides a novel glass forming method.

Fig. 4a is a schematic structural view of a conventional calender stack structure. Fig. 4b is a side view of fig. 4 a. Fig. 4c is an exploded view of a conventional calender stack structure.

As shown in fig. 4a to 4c, a calender unit structure widely used in the market at present generally includes a calender body 6, an upper calender main roll 7, a lower calender main roll 8, a rocker arm 9, a screw reducer 10 and a mechanical pressure device 20, wherein the upper calender main roll 7 and the lower calender main roll 8 are both mounted on the calender body 6, the arrangement direction of the upper calender main roll 7 and the lower calender main roll 8 is the same as the longitudinal direction (y direction in the drawing) of the calender body 6, the rocker arm 9 is pivoted on the calender body 6, one end of the rocker arm 9 is connected to the upper calender main roll 7, the screw reducer 10 is mounted on the other end of the rocker arm 9, the mechanical pressure device 20 is mounted on the calender body 6, and the mechanical pressure device 20 is located above the upper calender main roll 7, specifically, when glass needs to be pressed, a gap between the upper calender main roll 7 and the lower calender main roll 8 is adjusted to enable the glass to be located in the gap, the screw rod 101 drives the rocker arm 9 to rotate by enabling the screw rod speed reducer 10 to work, specifically, the front end of the rocker arm supports the upper rolling main roller 7, the upper bearing bush cover 71 of the upper rolling main roller 7 is connected with the lower part of the front end of the rocker arm 9 by a bolt, when the upper rolling main roller 7 is installed, the upper bearing bush cover 71 is opened, the rocker arm 9 is fixed with the calender body 6 by a pin shaft, so that the rocker arm can rotate around a connecting point between the rocker arm 9 and the calender body 6 to form a lever force, the screw rod speed reducer 10 is fixed at the rear end of the rocker arm 9, so that a screw rod on the screw rod speed reducer 10 can support at least part of the calender body 6, so that the front end of the rocker arm 9 can support the upper rolling main roller 7 by the pin shaft connecting the rocker arm 9 and the calender body 6, and when the gap between the upper rolling main roller 7 and the lower rolling main roller 8 needs to be adjusted, a hand wheel on, the upper and lower movement of the upper main rolling roll 7 is realized, when the produced glass is thinner, the gap is smaller, but when the high-temperature liquid is squeezed between the upper main rolling roll 7 and the lower main rolling roll 8 in normal production, the upper main rolling roll 7 receives a large buoyancy, and when the produced glass is thinner, the buoyancy is larger, therefore, a certain downward pressure must be applied to the upper main rolling roll 7 through the mechanical pressure device 20 to overcome the upward buoyancy generated by the glass to the upper main rolling roll 7, specifically, the mechanical pressure device 20 comprises a rotating force claw 201 and a pressure lever 202, and when the thin glass is produced, by manually rotating the rotating force claw 201, the force claw 201 rotates to drive a pressure lever head 2021 of the pressure lever 202 to move downwards, so as to apply a certain force to the upper main rolling roll 7. It should be noted that the downward pressure is mainly to overcome the buoyancy of the molten glass between the upper rolling main roll 7 and the lower rolling main roll 8 on the upper rolling main roll 7, and the thinner the produced glass is, the greater the applied pressure is, for example, 5000N to 10000N is required for producing 3.2mm glass; when the glass with the thickness of 2.5mm is produced, the pressure of 16000N-28000N is needed; when producing 2.0mm glass, a pressure of 42000N to 63000N is required.

Therefore, the defects of the calender unit structure mainly comprise two points, the first point is that operators need to pay large physical labor, and the operators are easily radiated by the heat of the high-temperature molten glass in the open area in front of the calender roll, so that the operators have high operation difficulty; the second point is that the pressure applied to the upper main roller of the rolling mill is manually adjusted, and because the manually applied force is too small (generally less than 28000N), the production of conventional glass with larger thickness can be met, but the production of glass with smaller thickness cannot be met.

The conventional thickness of the existing glass is thinner, the production and manufacturing method mainly adopts a float forming method and an overflow downdraw method, and the glass produced by the two methods has poor performance and low mechanical strength; meanwhile, a calender used in the conventional calendering method cannot be used for pressing glass with a relatively thin thickness, and the produced glass has poor performance and low mechanical strength.

In order to overcome the defects, the application provides glass, a glass forming method, a pressing device and a calender, which can optimize the performance of the glass and improve the mechanical strength of the glass.

The embodiment of the application provides glass, and the raw materials of the glass comprise the following components in parts by weight: SiO2₂61-76 parts of Li₂O: 6 to 10 parts of Na₂O: 2-12 parts of CaO, 5-0 parts of MgO: 5 to 0 parts of Al₂O₃16 to 0 parts of TiO and₂+ZrO₂: 5-2 parts.

Wherein, SiO₂Forming an oxide for the glass; li₂O is beneficial to fluxing and increasing the strength of the glass, and can also reduce the thermal expansion coefficient of the glass; adding Na₂O, MgO is intended to reduce the melting temperature of the glass; the introduction of CaO can enhance the chemical stability of glass, reduce the high-temperature viscosity of molten glass and promote the melting and clarification of the glass; al (Al)₂O₃The strength and hardness of the glass can be improved; TiO 2₂+ZrO₂Is a crystal nucleus agent.

As an optional implementation manner, the glass provided in this embodiment includes, in parts by weight: SiO2₂: 76 parts of Li₂O: 10 parts of Na₂O: 12 parts and TiO₂+ZrO₂: and 2 parts.

In order to verify the properties of the glass raw materials of the above mixed components, in this example, the reflectance curves of the glasses of the mixed components were measured by a transmittance meter, and it was found that the average reflectance of the glasses of the mixed components was 92.1% or more and the average reflectance of the glass raw sheets without addition of Li2O was 90.2% to 91.8% in the wavelength range of light when the wavelength of light was between 400nm and 1200 nm. Therefore, under the same conditions, the average reflectivity of the glass adopting the mixed components is obviously greater than that of the glass not adopting the mixed componentsAddition of Li₂Average reflectance of glass base sheet of O.

In order to further verify the performance of the glass formed by the glass raw materials with the mixed components, the glass formed by the glass raw materials with the mixed components is tested by a surface stress meter, and the surface stress of the glass formed by the glass raw materials with the mixed components is 800 CS/Mpa-900 CS/Mpa.

The surface stress values and other properties of glasses formed using the glass raw materials of the above-described mixed components are further described below with reference to table 1.

TABLE 1

As shown in Table 1, Table 1 is a table comparing the surface stress values and other properties of glasses manufactured by several companies on the market with those of glasses manufactured in this example.

As another optional implementation manner, the glass provided in this embodiment includes, in parts by weight: SiO2₂:61 parts of Li₂O: 6 parts of Na₂O: 2 parts of CaO:5 parts of MgO: 5 parts of Al₂O₃16 parts by weight of TiO₂+ZrO₂:5 parts of the raw materials.

In order to verify the properties of the glass raw material of the mixed components described above, in this example, the reflectance curve of the glass of the mixed components was measured by a transmittance meter, and it was found that the average reflectance of the glass of the mixed components was 92.2% or more and the average reflectance of the glass raw sheet without addition of Li2O was 90.2% to 91.8% in the wavelength range of light when the wavelength of light was between 400nm and 1200 nm. Therefore, under the same conditions, the average reflectance of the glass using the above mixed components was significantly larger than that of the glass original sheet without addition of Li 2O.

The surface stress values and other properties of the glasses formed using the glass raw materials of the above mixed components are described below with reference to table 2.

TABLE 2

As shown in Table 2, Table 2 is a table comparing the surface stress values and other properties of glasses manufactured by several companies on the market with those of glasses manufactured in this example.

As another alternative embodiment, in this embodiment, the raw materials for providing glass include, by weight: SiO2₂: 70 parts of Li₂O: 8 parts of Na₂O: 10 parts of CaO: 1.5 parts, MgO: 1.5 parts of Al₂O₃:5 parts and TiO₂+ZrO₂: 4 parts.

In order to verify the properties of the glass raw material of the mixed components described above, in this example, the reflectance curve of the glass of the mixed components was measured by a transmittance meter, and it was found that the average reflectance of the glass of the mixed components was 92.3% or more when the wavelength of light was between 400nm and 1200nm, while the average reflectance of the glass raw sheet without addition of Li2O was 90.2% to 91.8% in the wavelength range of the light. Therefore, under the same conditions, the average reflectance of the glass using the above mixed components was significantly larger than that of the glass original sheet without addition of Li 2O.

In order to further verify the performance of the glass formed by the glass raw materials with the mixed components, the glass formed by the glass raw materials with the mixed components is tested by a surface stress meter, and the surface stress of the glass formed by the glass raw materials with the mixed components is 800 CS/Mpa-900 CS/Mpa. The surface stress values and other properties of the glasses formed using the glass raw materials of the above mixed components are described below with reference to table 3.

TABLE 3

As shown in Table 3, Table 3 is a table comparing the surface stress values and other properties of glasses manufactured by several companies on the market with those of glasses manufactured in this example.

The glass raw materials of the mixed components are placed in a melting furnace, melted at the temperature of about 1610 ℃, pressed and formed, annealed, crystallized and polished to obtain the final glass product.

The glass provided by the embodiment comprises the following raw materials in parts by weight: SiO2₂61-76 parts of Li₂O: 6 to 10 parts of Na₂O: 2-12 parts of CaO, 5-0 parts of MgO: 5 to 0 parts of Al₂O₃16 to 0 parts of TiO and₂+ZrO₂: 5-2 parts. Therefore, the glass provided by the embodiment has better performance and higher mechanical strength

The embodiment of the application also provides a glass forming method, and the glass is prepared by the glass forming method.

Fig. 5a is a schematic flow chart illustrating steps of a glass forming method according to an embodiment of the present disclosure. Fig. 5b is a schematic flow chart illustrating a step of processing amorphous glass to obtain crystalline glass in a glass forming method according to an embodiment of the present application. Fig. 5c is a schematic flow chart of another step of processing amorphous glass to obtain crystalline glass in the glass forming method according to the embodiment of the present application.

As shown in fig. 5a and 5b, the method for forming glass according to the present embodiment includes:

s101, blending the raw materials for preparing the glass to obtain the raw materials for preparing the glass.

Specifically, the glass comprises the following raw materials in parts by weight: SiO2₂61-76 parts of Li₂O: 6 to 10 parts of Na₂O: 2-12 parts of CaO, 5-0 parts of MgO: 5 to 0 parts of Al₂O₃16 to 0 parts of TiO and₂+ZrO₂: 5-2 parts.

It should be noted that, in the above embodiments, the glass raw materials of the respective mixed components have been described in detail, and are not described again here.

And S102, processing the glass raw material to obtain molten glass.

Specifically, the raw material of the glass may be placed in a melting furnace to be melted to obtain molten glass.

And S103, processing the molten glass by a rolling method to obtain amorphous glass.

The rolling method may be performed by a rolling mill.

And S104, processing the amorphous glass to obtain crystalline glass.

Thus, the amorphous glass becomes crystalline glass, and the glass is convenient to process later.

And S105, polishing the crystalline glass to obtain the formed glass.

Wherein the crystalline glass can be polished by a polishing machine.

In some embodiments, processing the glass in the amorphous state to obtain the glass in the crystalline state comprises:

s201, processing the amorphous glass through an annealing process to obtain the glass in a transition state.

Thus, the hardness of the glass can be reduced, and the crystal grains of the glass can be refined, so that the performance of the obtained glass can be improved.

S202, crystallizing the glass in the transition state to obtain crystalline glass.

Thus, the crystal grains of the glass can be further refined, and the performance of the obtained glass can be improved.

And S203, cutting the crystalline glass to obtain the regular shape of the crystalline glass.

Thus, the glass is convenient to use in the later period.

As shown in fig. 5c, in some embodiments, processing the amorphous glass to obtain the crystalline glass comprises:

s301, processing the amorphous glass through an annealing process to obtain the glass in a transition state.

S302, cutting the glass in the transition state to obtain the regular shape of the glass in the transition state.

This facilitates subsequent processing of the glass and enables the grains of the glass to be refined.

And S303, crystallizing the cut transition glass to obtain crystalline glass.

Therefore, the crystal grains of the glass can be refined for the second time, and the performance of the produced glass is improved.

In this embodiment, the crystallization includes both in-line crystallization and off-line crystallization.

In this embodiment, after the molded glass is put in storage, chemically tempering the glass after being put in storage is further included. So that the formed glass has higher mechanical strength and better performance.

The glass forming method provided by the embodiment includes: batching raw materials for preparing glass to obtain raw materials for preparing the glass; processing raw materials of glass to obtain molten glass; processing the molten glass by a rolling method to obtain amorphous glass; processing the amorphous glass to obtain crystalline glass; and polishing the crystalline glass to obtain the formed glass. The glass prepared by the forming method of the glass provided by the embodiment has better performance and higher mechanical strength.

The embodiment of the application also provides a pressing device, and in the forming method, the pressing device is used for processing the glass in the molten state to obtain the amorphous glass. The present embodiment will be described in detail below with reference to the accompanying drawings and specific embodiments.

It should be noted that the basis of the pressing device provided in the present embodiment is "lever balance condition" based on the lever principle. Specifically, to balance the lever, the two moments (the product of the force and the moment arm) acting on the lever must be equal in magnitude. Namely: the power x power arm is represented by an algebraic expression: f1 · L1 is F2 · L2, where F1 denotes a power arm, L1 denotes a power arm, F2 denotes a resistance, and L2 denotes a resistance arm. From the above formula, to balance the lever, the power arm is several times as much as the resistance arm, and the resistance is several times as much as the power.

Fig. 6a is a schematic structural diagram of a pressing device according to an embodiment of the present application. Fig. 6b is a side view of fig. 6 a.

As shown in fig. 6a and 6b, the pressing device provided by the embodiment of the present application includes two opposite pressing mechanisms 30, each pressing mechanism 30 includes a base 31, a cross beam 32, a pressing rod 33, an upright column 34 and a driving mechanism 35, the upright column 34 and the driving mechanism 35 are both installed on the base 31, a first end of the pressing rod 33, an end of the upright column 34 away from the base 31, and an end of the driving mechanism 35 away from the base 31 are all pivotally connected to the cross beam 32, and the upright column 34 is located between the pressing rod 33 and the driving mechanism 35.

In the present embodiment, the upright 34 and the base 31 and the driving mechanism 35 and the base 31 may be connected by a screw connection or a welding connection. The object of the present embodiment can be achieved by any connection method that can reliably connect the column 34 and the base 31 and the drive mechanism 35 and the base 31.

In an alternative embodiment, the driving mechanism 35 includes a motor reducer 351 and a turbine lifting reducer 352, the motor reducer 351 is connected to an input shaft of the turbine lifting reducer 352 through a coupling, and a lead screw conductor at the top end of the turbine lifting reducer 352 is rotatably connected to the cross beam 32 through a pin shaft.

Specifically, by activating the motor reducer 351, the lead screw conductor on the turbine lifting reducer 352 drives one end of the cross beam 32 to ascend or descend, and further, the pressure lever 33 located at the other end of the cross beam 32 descends or ascends.

In another alternative embodiment, the drive mechanism 35 includes a handwheel and a turbine lift reducer 352, the handwheel being rotatably connected to an input shaft of the turbine lift reducer 352 by a locating pin.

Specifically, by rotating the hand wheel, the lead screw conductor on the turbine lifting reducer 352 drives one end of the cross beam 32 to ascend or descend, and further, the pressure lever 33 located at the other end of the cross beam 32 descends or ascends.

In a further alternative embodiment, the driving mechanism 35 is a mechanical jack, one end of which is connected to the base 31, and the other end of which is pivoted to the cross beam 32, and by operating the mechanical jack, the mechanical jack drives one end of the cross beam 32 to ascend or descend, and then the pressure rod 33 at the other end of the cross beam 32 to descend or ascend.

In a specific implementation manner of this embodiment, the pressing rod 33 includes an upper pressing rod 331 and a pressing rod head 332, a first end of the upper pressing rod 331 is pivoted on the cross beam 32, and a second end of the upper pressing rod 331 is connected with the pressing rod head 332 through a screw thread.

Thus, the upper pressure rod 331 and the pressure rod head 332 can be conveniently mounted or dismounted, and the pressure rod head 332 can be conveniently replaced.

As an alternative embodiment, the pressing device provided in this embodiment further includes a pressure sensor 40, a first end of the pressure sensor 40 is connected to the driving mechanism 35, and a second end of the pressure sensor 40 is pivotally connected to the cross beam 32.

In the present embodiment, the pressure sensor 40 is used to detect the force received by the end of the strut 33.

In some embodiments, the pressing device provided by the present application further includes a limit switch 50, the limit switch 50 is disposed on the pillar 34, and the limit switch 50 has a first contact point and a second contact point, the first contact point can abut against the first end surface of the pressure sensor 40, and the second contact point can abut against the second end surface of the pressure sensor 40.

Specifically, when the housing of the pressure sensor 40 touches the first contact point or the second mechanical contact point of the limit switch 50, the motor reducer 351 stops operating, and is automatically protected.

In a specific embodiment of this embodiment, limit switch 50 is attached to upright 34 by threaded fasteners.

The pressing device that this application embodiment provided, including the pressing mechanism of two relative settings, pressing mechanism includes base, crossbeam, depression bar, stand and actuating mechanism, and stand and actuating mechanism all install on the base, and the base was kept away from to the one end and the actuating mechanism's that the base was kept away from to the first end of depression bar, stand all pin joint on the crossbeam, and the stand is located between depression bar and the actuating mechanism. The pressing device provided by the embodiment can press glass with different thicknesses, so that the pressed glass has better performance.

The embodiment of the application also provides a calender. The present embodiment will be described in detail below with reference to the accompanying drawings.

Fig. 7a is a schematic structural diagram of a first calender provided in an embodiment of the present application. Fig. 7b is a cross-sectional view taken along a-a of fig. 7 a. Fig. 8a is a schematic structural diagram of a second calender provided in an embodiment of the present application. Fig. 8B is a cross-sectional view taken along line B-B of fig. 8 a. Fig. 9a is a schematic structural diagram of a third calender provided in the embodiment of the present application. Fig. 9b is a cross-sectional view taken along line C-C of fig. 9 a. Fig. 10a is a schematic view of a fourth structure of a calender according to an embodiment of the present application. Fig. 10b is a cross-sectional view taken along line D-D of fig. 10 a. Fig. 11a is a schematic structural diagram of a fifth kind of calender provided in the embodiment of the present application. Fig. 11b is a side view of fig. 11 a. Fig. 12a is a schematic structural diagram of a sixth kind of calender provided in the embodiment of the present application. Fig. 12b is a side view of fig. 12 a. Fig. 13a is a schematic structural diagram of a seventh calender provided in the embodiment of the present application. Fig. 13b is a side view of fig. 13 a.

As shown in fig. 7a to 13b, an embodiment of the present application provides a calender comprising a calender body 60, an upper main calendering roll 70, a lower main calendering roll 80 and the above-mentioned pressing device, wherein the upper main calendering roll 70 and the lower main calendering roll 80 are oppositely arranged on the calender body 60, and the upper main calendering roll 70 and the lower main calendering roll 80 are distributed in the same direction as the longitudinal direction (y direction in the figure) of the calender body 60, and molten glass can be located between the upper main calendering roll 70 and the lower main calendering roll 80; the pressing device is arranged on the calender body 60, specifically, the base 31 is connected with the calender body in a welding connection mode, and the second end of the pressing rod 33 can be pressed on the upper calendering main roller 70, that is, the pressing rod head 332 can be pressed on the upper calendering main roller 70.

It should be noted that the specific structure of the pressing device has been specifically described in the above embodiments, and the detailed description of the specific structure of the pressing device is omitted here.

As an alternative embodiment, as shown in fig. 7a and 7b, the driving mechanism 35 includes a hand wheel 353 and a turbine lifting reducer 352, and the hand wheel 353 is rotatably connected with an input shaft of the turbine lifting reducer 352 through a positioning pin.

Specifically, by rotating the hand wheel 353, the screw conductor of the turbine elevating/reducing gear 352 drives one end of the cross beam 32 to ascend or descend, and further, the pressing rod 33 located at the other end of the cross beam 32 descends or ascends, so as to change the pressure of the upper main rolling roll 70 on the molten glass.

As shown in fig. 8a and 8b, as another alternative embodiment, the driving mechanism 35 is a mechanical jack 150, one end of the mechanical jack 150 is connected to the base 31, the other end of the mechanical jack 150 is pivoted on the cross beam 32, and by operating the mechanical jack 150, the mechanical jack 150 drives one end of the cross beam 32 to ascend or descend, and further the pressure rod 33 at the other end of the cross beam 32 descends or ascends, so as to change the pressure of the upper main roller 70 on the molten glass.

As shown in fig. 9a to 10b, as a further alternative embodiment, the driving mechanism 35 includes a motor reducer 351 and a turbine lifting reducer 352, the motor reducer 351 is connected to an input shaft of the turbine lifting reducer 352 through a coupling, and a lead screw conductor at the top end of the turbine lifting reducer 352 is rotatably connected to the cross beam 32 through a pin shaft. Specifically, by activating the motor reducer 351, the screw conductor on the turbine elevating reducer 352 drives one end of the cross beam 32 to ascend or descend, and further, the pressing rod 33 located at the other end of the cross beam 32 descends or ascends, so as to change the pressure of the upper main rolling roll 70 on the molten glass.

As shown in fig. 11a to 13b, the calender body 60 includes a first body 61 and a second body 62, the second body 62 has a table located above the first body 61, the upper calender main roll 70 and the lower calender main roll 80 are both disposed on the first body 61, the pressing device is disposed on the table, and the pressing rod 33 is penetrated through the table.

In a specific embodiment of this embodiment, the second body 62 is formed by welding i-steel or channel steel.

In order to realize the automatic operation of the calender provided by this embodiment, in this embodiment, the calender further includes a calender upper main roller motor 90, a calender lower main roller motor 100, an electric control cabinet 110 and a touch screen 120, a motor shaft of the calender upper main roller motor 90 is connected to the calender upper main roller 70, a motor shaft of the calender lower main roller motor 100 is connected to the calender lower main roller 80, the electric control cabinet 110 and the touch screen 120 are all disposed on the calender body 60, and the calender upper main roller motor 90, the calender lower main roller motor 100 and the touch screen 120 are all electrically connected to the electric control cabinet 110.

Like this, can reduce staff's the amount of labour, resources of using manpower sparingly.

The calender provided by the embodiment further comprises a plurality of additional rolls 130 and a plurality of movable rolls 140 which are arranged on the calender body 60, and after the molten glass is extruded, the molten glass is conveyed to the movable rolls 140 through the plurality of additional rolls 130 and conveyed to other processing equipment through the movable rolls 140.

It is noted that the extruded glass may be transferred to an apparatus for performing an annealing process after passing through the movable roll 140. Here, the apparatus for performing the annealing process is not limited.

When the calender provided by this embodiment is used, the speed parameters of the upper main calendering roll 70, the lower main calendering roll 80, the auxiliary calendering roll 130 and the movable roll 140 are set, so that the corresponding parameters are displayed on the touch screen 120, and a certain pressure parameter is set for the pressure sensor 40, so that the certain pressure parameter is displayed on the touch screen 120, the touch screen 120 sends a signal to the electric control cabinet 110, so that the electric control cabinet 110 controls the on-site motor reducer 351 to rotate, the lead screw on the turbine lifting reducer 352 is lifted and lowered, and the pressure rod 33 is driven to ascend or descend, so that the liquid molten glass is pressed into glass with a certain thickness through the upper main calendering roll 70 and the lower main calendering roll 80.

When the actual pressure value detected by the pressure sensor 40 is inconsistent with the set pressure value, the electric control cabinet 110 drives the motor reducer 351 to move to drive the turbine lifting reducer 352 to ascend or descend, and the acting force passes through the rotating fulcrum on the upright column 34 to realize the ascending or descending of the pressure lever 33, so as to control the force applied by the pressure lever 33 to the upper main rolling roll 70. The motor reducer 351 stops operating until the actual pressure value detected by the pressure sensor 40 is equal to the set pressure value.

When the circuit is unexpected, when the motor reducer 351 malfunctions, the shell of the pressure sensor 40 touches the first mechanical contact or the second mechanical contact of the limit switch 50, and at this time, the electric control cabinet 110 receives a signal to control the motor reducer 351 to stop working, so as to perform autonomous protection.

It should be noted that the thinner the thickness of the produced glass, the greater the pressure value set by the pressure sensor 40, and the greater the pressure applied to the upper calender main roll 70 by the cross member 32.

The calender provided by the embodiment comprises a calender body, an upper calendering main roller, a lower calendering main roller and a pressing device, wherein the upper calendering main roller and the lower calendering main roller are oppositely arranged on the calender body, the distribution directions of the upper calendering main roller and the lower calendering main roller are consistent with the longitudinal direction of the calender body, and molten glass can be positioned between the upper calendering main roller and the lower calendering main roller; the pressing device is arranged on the calender body, and the second end of the pressing rod can be pressed on the upper main roller of the calender. The calender provided by the embodiment comprises the pressing device, so that the glass with different thicknesses can be pressed, and the pressed glass has better performance.