阅读说明：本技术 一种重负荷玻璃纤维砂轮增强网布及其制造方法 (Heavy-load glass fiber grinding wheel reinforced mesh cloth and manufacturing method thereof ) 是由 顾华 顾建冬 于 2020-11-20 设计创作，主要内容包括：本发明涉及一种重负荷玻璃纤维砂轮增强网布及其制造方法,其由玻璃纤维网布和专用酚醛树脂胶构成,玻璃纤维网布采用平加绞捆绑结构,且经线选用TM468G-2400,纬线选用ECT469T-4800；即经线每两根一组,各组之间平行排列,每组的两根经线前后交叉织造,形成交叉点和扭交孔,相邻两排的交叉点和扭交孔互相对应；在扭交孔和交叉点处分别穿设纬线,一根纬线穿过扭交孔,相邻的一根纬线平置于交叉点的两经线之间,所述每组经线上还设置有一根呈蛇字型且用于固定经线与纬线的交叉点的纤维丝；专用酚醛树脂胶是由热塑性酚醛树脂、热固性酚醛树脂、偶联剂、环氧树脂和甲醇制备而成。通过本发明,能够大大提高重负荷玻璃纤维砂轮增强网片的强度。(The invention relates to a heavy-load glass fiber grinding wheel reinforced mesh cloth and a manufacturing method thereof, wherein the glass fiber grinding wheel reinforced mesh cloth is composed of glass fiber mesh cloth and special phenolic resin glue, the glass fiber mesh cloth adopts a horizontal twisting and binding structure, the warp thread adopts TM468G-2400, and the weft thread adopts ECT 469T-4800; two warps are arranged in one group, each group is arranged in parallel, the two warps of each group are woven in a front-back crossing manner to form crossing points and twisting holes, and the crossing points and the twisting holes of two adjacent rows correspond to each other; the method comprises the following steps that wefts penetrate through twisting holes and crossing points respectively, one weft penetrates through the twisting holes, an adjacent weft is horizontally arranged between two warps of the crossing points, and each group of warps is also provided with a fiber yarn which is in a snake-shaped shape and used for fixing the crossing points of the warps and the wefts; the special phenolic resin glue is prepared from thermoplastic phenolic resin, thermosetting phenolic resin, a coupling agent, epoxy resin and methanol. The invention can greatly improve the strength of the heavy-load glass fiber grinding wheel reinforced mesh.)

1. A heavy-load glass fiber grinding wheel reinforced mesh fabric is composed of a glass fiber mesh fabric and a special phenolic resin adhesive; the method is characterized in that: the glass fiber mesh cloth adopts a plain twisted binding structure, the warp yarns are TM468G2400 produced in Chongqing International, and the weft yarns are ECT469T-4800 produced in Chongqing International; two warps are arranged in one group, each group is arranged in parallel, the two warps of each group are woven in a front-back crossing manner to form crossing points and twisting holes, and the crossing points and the twisting holes of two adjacent rows correspond to each other; the method comprises the following steps that wefts penetrate through twisting holes and crossing points respectively, one weft penetrates through the twisting holes, an adjacent weft is horizontally arranged between two warps of the crossing points, and each group of warps is also provided with a fiber yarn which is in a snake-shaped shape and used for fixing the crossing points of the warps and the wefts;

the special phenolic resin adhesive is prepared from the following components in parts by weight: 48-52 parts of thermoplastic phenolic resin, 11-15 parts of thermosetting phenolic resin, 0.5-1.5 parts of coupling agent, 3-5 parts of epoxy resin and 31-33 parts of methanol.

2. A method for manufacturing a heavy-load glass fiber grinding wheel reinforced mesh cloth is characterized by comprising the following steps: the specific method comprises the following steps:

s1: weaving glass fiber mesh cloth: selecting TM468G-2400 produced by Chongqing International as warp, selecting ECT469T-4800 produced by Chongqing International as weft, arranging the warp in parallel with each other, weaving the two warps of each group in a front-back crossing manner to form crossing points and twisting holes, wherein the crossing points and twisting holes of two adjacent rows correspond to each other; respectively penetrating wefts at the twisting holes and the crossing points, enabling one weft to penetrate through the twisting holes, enabling an adjacent weft to be horizontally arranged between two warps of the crossing points, and binding a fiber yarn which is in a snake shape and used for fixing the crossing points of the warps and the wefts on each group of warps to form glass fiber mesh cloth;

s2: surface treatment of glass fiber mesh cloth: unreeling the glass fiber mesh cloth through an unreeling roller, carrying out surface tensioning on the glass fiber mesh cloth through a conveying roller set, and conveying the glass fiber mesh cloth to the upper side of the grounding metal plate, wherein the conveying speed of the conveying roller set and the unreeling roller set is 16-24 m/min; the method comprises the following steps of (1) arranging modification liquid in a modification liquid injector, arranging a metering pump on the modification injector, arranging a metal wire spray head at the output end of the modification liquid injector, and connecting a 220V power supply to the metal wire spray head to form a high-voltage electric field between the metal wire spray head and a grounding metal plate; under the regulation action of a metering pump, injecting the modifying solution onto a metal wire spray head according to the injection amount of 50ml/min, and spraying the modifying solution onto the glass fiber mesh cloth passing through the surface of the grounded metal plate;

s3: a gum dipping procedure: guiding the glass fiber mesh cloth subjected to surface treatment by a guide roller arranged on a dipping pond, and stretching and extending the surface of the glass fiber mesh cloth by a tensioning roller to increase the dipping effect; then, dipping glue through an adjusting roller arranged in a glue stock tank; the gum dipping time of the glass fiber mesh cloth in the sizing material pool is increased by winding the adjusting roller and is controlled within 3-4 min; the dosage of the special phenolic resin adhesive is 80-120 g/m²；

S4: and (3) drying: conveying the glass fiber mesh cloth subjected to the gum dipping process into a drying tower body to be wound on a reversing roller set, opening a circulating fan and opening a combustion chamber to perform heat exchange; controlling the temperature of the drying tower body to be 10-12 ℃, raising the temperature to 100-120 ℃, and keeping the temperature to ensure that the glass fiber mesh cloth is dried in the drying tower body for 4-6 min;

s5: secondary heating: and heating the dried glass fiber mesh cloth in the drying tower for 6-10min again.

3. The manufacturing method of the heavy-load glass fiber grinding wheel reinforced mesh cloth according to claim 2, characterized in that: and a guide scraper is also arranged in the drying tower body, so that the rubber particles on the surface can be scraped off in the welding and conveying process.

4. The manufacturing method of the heavy-load glass fiber grinding wheel reinforced mesh cloth according to claim 2, characterized in that: the special phenolic resin adhesive is prepared by the following method:

(1): mixing thermoplastic phenolic resin and thermosetting phenolic resin, and then adding epoxy resin under stirring at normal temperature;

(2): adding a coupling agent into the product obtained in the step (1), and continuously stirring until the mixture is uniformly stirred;

(3): and (3) adding methanol into the product obtained in the step (2), starting a stirrer to stir at a rotating speed of 150-200 r/min for 4-6 hours to obtain the special phenolic resin adhesive.

Technical Field

The invention relates to the field of grinding wheel reinforced meshes, in particular to a heavy-load glass fiber grinding wheel reinforced mesh cloth and a manufacturing method thereof.

Background

The reinforced mesh of the grinding wheel is a skeleton in the resin grinding wheel, plays an important role in the strength of the whole grinding wheel and directly determines the quality of the grinding wheel. In the JB/T11432-2003 glass fiber reinforced sheet for bonded abrasive tools industry standard, the product specification EP 8X 8-520/2950 is the variety of the maximum gram weight and the highest load goods in the markets at home and abroad at present.

The existing grinding wheel reinforced mesh is generally in a twisting structure, common twisting is that a needle bar reed forms a cloth fell up and down, weft threads are inserted into the cloth fell, interweaving points are generated, the strength of warp threads is greatly damaged, and the ratio of the warp threads of the grinding wheel mesh cloth gray cloth to the warp threads of the reinforced mesh is reduced.

In order to meet the requirements of cutting production of large-scale heavy industrial grinding wheels, the invention adopts a new weaving loom method and selects specific raw materials to produce EG2 x 2-800 glass fiber grinding wheel mesh cloth which is used in a heavy-load glass fiber grinding wheel reinforcing mesh; meanwhile, the strength of the heavy-load glass fiber grinding wheel reinforced mesh can be greatly improved.

Disclosure of Invention

The invention aims to provide a heavy-load glass fiber grinding wheel reinforced mesh cloth capable of improving the strength of a grinding wheel reinforced mesh and a manufacturing method thereof.

In order to solve the technical problems, the technical scheme of the invention is as follows: a heavy-load glass fiber grinding wheel reinforced mesh fabric is composed of a glass fiber mesh fabric and a special phenolic resin adhesive; the innovation points are as follows: the glass fiber mesh cloth adopts a plain twisted binding structure, the warp yarns are TM468G2400 produced in Chongqing International, and the weft yarns are ECT469T-4800 produced in Chongqing International; two warps are arranged in one group, each group is arranged in parallel, the two warps of each group are woven in a front-back crossing manner to form crossing points and twisting holes, and the crossing points and the twisting holes of two adjacent rows correspond to each other; the method comprises the following steps that wefts penetrate through twisting holes and crossing points respectively, one weft penetrates through the twisting holes, an adjacent weft is horizontally arranged between two warps of the crossing points, and each group of warps is also provided with a fiber yarn which is in a snake-shaped shape and used for fixing the crossing points of the warps and the wefts;

the special phenolic resin adhesive is prepared from the following components in parts by weight: 48-52 parts of thermoplastic phenolic resin, 11-15 parts of thermosetting phenolic resin, 0.5-1.5 parts of coupling agent, 3-5 parts of epoxy resin and 31-33 parts of methanol.

A method for manufacturing a heavy-load glass fiber grinding wheel reinforced mesh cloth has the innovation points that: the specific method comprises the following steps:

s1: weaving glass fiber mesh cloth: selecting TM468G-2400 produced by Chongqing International as warp, selecting ECT469T-4800 produced by Chongqing International as weft, arranging the warp in parallel with each other, weaving the two warps of each group in a front-back crossing manner to form crossing points and twisting holes, wherein the crossing points and twisting holes of two adjacent rows correspond to each other; respectively penetrating wefts at the twisting holes and the crossing points, enabling one weft to penetrate through the twisting holes, enabling an adjacent weft to be horizontally arranged between two warps of the crossing points, and binding a fiber yarn which is in a snake shape and used for fixing the crossing points of the warps and the wefts on each group of warps to form glass fiber mesh cloth;

s2: surface treatment of glass fiber mesh cloth: unreeling the glass fiber mesh cloth through an unreeling roller, carrying out surface tensioning on the glass fiber mesh cloth through a conveying roller set, and conveying the glass fiber mesh cloth to the upper side of the grounding metal plate, wherein the conveying speed of the conveying roller set and the unreeling roller set is 16-24 m/min; the method comprises the following steps of (1) arranging modification liquid in a modification liquid injector, arranging a metering pump on the modification injector, arranging a metal wire spray head at the output end of the modification liquid injector, and connecting a 220V power supply to the metal wire spray head to form a high-voltage electric field between the metal wire spray head and a grounding metal plate; under the regulation action of a metering pump, injecting the modifying solution onto a metal wire spray head according to the injection amount of 50ml/min, and spraying the modifying solution onto the glass fiber mesh cloth passing through the surface of the grounded metal plate;

s3: a gum dipping procedure: arranging the glass fiber mesh cloth subjected to surface treatmentGuiding by a guide roller on the dipping pool, and stretching and extending the surface of the glass fiber mesh cloth by a tensioning roller to increase the dipping effect; then, dipping glue through an adjusting roller arranged in a glue stock tank; the gum dipping time of the glass fiber mesh cloth in the sizing material pool is increased by winding the adjusting roller and is controlled within 3-4 min; the dosage of the special phenolic resin adhesive is 80-120 g/m²；

S4: and (3) drying: conveying the glass fiber mesh cloth subjected to the gum dipping process into a drying tower body to be wound on a reversing roller set, opening a circulating fan and opening a combustion chamber to perform heat exchange; controlling the temperature of the drying tower body to be 10-12 ℃, raising the temperature to 100-120 ℃, and keeping the temperature to ensure that the glass fiber mesh cloth is dried in the drying tower body for 4-6 min;

s5: secondary heating: and heating the dried glass fiber mesh cloth in the drying tower for 6-10min again.

Furthermore, a guiding scraper is further arranged in the drying tower body, and rubber particles on the surface are scraped in the welding and conveying process.

Further, the special phenolic resin adhesive is prepared by the following method:

(1): mixing thermoplastic phenolic resin and thermosetting phenolic resin, and then adding epoxy resin under stirring at normal temperature;

(2): adding a coupling agent into the product obtained in the step (1), and continuously stirring until the mixture is uniformly stirred;

(3): and (3) adding methanol into the product obtained in the step (2), starting a stirrer to stir at a rotating speed of 150-200 r/min for 4-6 hours to obtain the special phenolic resin adhesive.

The invention has the advantages that:

1) in order to meet the requirements of cutting production of large-scale heavy-duty industrial grinding wheels, TM468G-2400 produced in Chongqing International is selected as warp, ECT469T-4800 produced in Chongqing International is selected as weft, high-density roving is selected as warp and weft, and in order to avoid influence on strength due to excessive bending times, a flat twisting and binding method is adopted, so that the strength of glass fiber mesh cloth and the mesh formed by the mesh cloth is improved; meanwhile, because the woven glass fiber mesh cloth has high gram weight and high cloth thickness, the existing resin adhesive and the woven glass fiber mesh cloth are difficult to soak, so that the formula of the existing resin adhesive is adjusted, the epoxy resin is added, the adhesion of the resin adhesive and the glass fiber mesh cloth is improved, the bonding force of the resin adhesive and the glass fiber mesh cloth is improved, and the strength of the heavy-load glass fiber grinding wheel reinforced mesh is further improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of a heavy-load fiberglass grinding wheel reinforced mesh cloth of the present invention.

FIG. 2 is a schematic diagram of the manufacturing method and apparatus of the reinforced mesh cloth of the heavy-duty fiberglass grinding wheel of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The reinforced mesh cloth of the heavy-load glass fiber grinding wheel shown in figure 1 is composed of glass fiber mesh cloth and special phenolic resin glue; the glass fiber mesh cloth adopts a plain twisted binding structure, the warp 1 is TM468G2400 produced in Chongqing International, and the weft 2 is ECT469T-4800 produced in Chongqing International; two warps 1 are arranged in one group, each group is arranged in parallel, the two warps of each group are woven in a front-back crossing manner to form crossing points and twisting holes, and the crossing points and the twisting holes of two adjacent rows are mutually corresponding; the weft threads 2 penetrate through the twisting holes and the crossing points respectively, one weft thread 2 penetrates through the twisting holes, the adjacent weft thread 2 is horizontally arranged between the two warp threads 1 of the crossing points, and each group of warp threads 1 is also provided with a fiber filament 3 which is shaped like a snake and is used for fixing the crossing points of the warp threads 1 and the weft threads 2.

A method for manufacturing a heavy-load glass fiber grinding wheel reinforced mesh cloth comprises the following specific steps: as shown in fig. 2

S1: weaving glass fiber mesh cloth: selecting TM468G-2400 produced by Chongqing International as warp, selecting ECT469T-4800 produced by Chongqing International as weft, arranging the warp in parallel with each other, weaving the two warps of each group in a front-back crossing manner to form crossing points and twisting holes, wherein the crossing points and twisting holes of two adjacent rows correspond to each other; respectively penetrating wefts at the twisting holes and the crossing points, enabling one weft to penetrate through the twisting holes, enabling an adjacent weft to be horizontally arranged between two warps of the crossing points, and binding a fiber yarn which is in a snake shape and used for fixing the crossing points of the warps and the wefts on each group of warps to form glass fiber mesh cloth;

s2: surface treatment of glass fiber mesh cloth: unreeling the glass fiber mesh cloth through an unreeling roller, carrying out surface tensioning on the glass fiber mesh cloth through a conveying roller set, and conveying the glass fiber mesh cloth to the upper side of the grounding metal plate, wherein the conveying speed of the conveying roller set and the unreeling roller set is 16-24 m/min; the method comprises the following steps of (1) arranging modification liquid in a modification liquid injector, arranging a metering pump on the modification injector, arranging a metal wire spray head at the output end of the modification liquid injector, and connecting a 220V power supply to the metal wire spray head to form a high-voltage electric field between the metal wire spray head and a grounding metal plate; under the regulation action of a metering pump, injecting the modifying solution onto a metal wire spray head according to the injection amount of 50ml/min, and spraying the modifying solution onto the glass fiber mesh cloth passing through the surface of the grounded metal plate;

s3: a gum dipping procedure: guiding the glass fiber mesh cloth subjected to surface treatment by a guide roller arranged on a dipping pond, and stretching and extending the surface of the glass fiber mesh cloth by a tensioning roller to increase the dipping effect; then, dipping glue through an adjusting roller arranged in a glue stock tank; the gum dipping time of the glass fiber mesh cloth in the sizing material pool is increased by winding the adjusting roller and is controlled within 3-4 min; the dosage of the special phenolic resin adhesive is 80-120 g/m²；

S4: and (3) drying: conveying the glass fiber mesh cloth subjected to the gum dipping process into a drying tower body to be wound on a reversing roller set, opening a circulating fan and opening a combustion chamber to perform heat exchange; controlling the temperature of the drying tower body to be 10-12 ℃, raising the temperature to 100-120 ℃, and keeping the temperature to ensure that the glass fiber mesh cloth is dried in the drying tower body for 4-6 min;

s5: secondary heating: and heating the dried glass fiber mesh cloth in the drying tower for 6-10min again.

And a guide scraper is also arranged in the drying tower body, so that the rubber particles on the surface can be scraped off in the welding and conveying process.

Example 1:

the special phenolic resin adhesive is prepared from the following components in parts by weight: 48 parts of thermoplastic phenolic resin, 11 parts of thermosetting phenolic resin, 0.5 part of coupling agent, 3 parts of epoxy resin and 31 parts of methanol.

The special phenolic resin adhesive is prepared by the following method:

(1): mixing thermoplastic phenolic resin and thermosetting phenolic resin, and then adding epoxy resin under stirring at normal temperature;

(2): adding a coupling agent into the product obtained in the step (1), and continuously stirring until the mixture is uniformly stirred;

(3): and (3) adding methanol into the product obtained in the step (2), starting a stirrer to stir at the rotating speed of 150r/min for 4 hours to obtain the special phenolic resin adhesive.

Example 2:

the special phenolic resin adhesive is prepared from the following components in parts by weight: 50 parts of thermoplastic phenolic resin, 13 parts of thermosetting phenolic resin, 1 part of coupling agent, 4 parts of epoxy resin and 32 parts of methanol.

The special phenolic resin adhesive is prepared by the following method:

(1): mixing thermoplastic phenolic resin and thermosetting phenolic resin, and then adding epoxy resin under stirring at normal temperature;

(2): adding a coupling agent into the product obtained in the step (1), and continuously stirring until the mixture is uniformly stirred;

(3): and (3) adding methanol into the product obtained in the step (2), starting a stirrer to stir at the rotating speed of 175r/min for 5 hours to obtain the special phenolic resin adhesive.

Example 3:

the special phenolic resin adhesive is prepared from the following components in parts by weight: 52 parts of thermoplastic phenolic resin, 15 parts of thermosetting phenolic resin, 1.5 parts of coupling agent, 5 parts of epoxy resin and 33 parts of methanol.

The special phenolic resin adhesive is prepared by the following method:

(1): mixing thermoplastic phenolic resin and thermosetting phenolic resin, and then adding epoxy resin under stirring at normal temperature;

(2): adding a coupling agent into the product obtained in the step (1), and continuously stirring until the mixture is uniformly stirred;

(3): and (3) adding methanol into the product obtained in the step (2), starting a stirrer to stir at the rotating speed of 200r/min for 6 hours to obtain the special phenolic resin adhesive.

The heavy duty fiberglass grinding wheel reinforcing mesh using examples 1-3 was compared to a conventional twisted structure reinforcing mesh as follows:

	twisted structure	Example 1	Example 2	Example 3
					Warp specification	200tex	TM468G-2400	TM468G-2400	TM468G-2400
Weft specification	400tex	ECT469T-4800	ECT469T-4800	ECT469T-4800
					Specific strength (warp)	0 .6～0 .7 N/tex	0 .76 N/tex	0 .76 N/tex	0 .8 N/tex
Specific strength (filling yarn)	0 .65～0 .75 N/tex	0 .76 N/tex	0 .78 N/tex	0 .8 N/tex
					Average thickness (mm)	0.73	2.44	2.62	2.60

And (4) conclusion: as can be seen from the above table, by adopting the manufacturing method of the invention, compared with the reinforced mesh sheet with a twisted structure, the specific strength of the reinforced mesh sheet can be improved, and the strength can be improved by more than 10%; meanwhile, the woven glass fiber mesh cloth is thicker than the traditional glass fiber mesh cloth, and is suitable for the heavy-load glass fiber grinding wheel reinforcing mesh.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.