阅读说明：本技术 一种复合化学钢化玻璃的制备方法及钢化炉系统 (Preparation method of composite chemically toughened glass and toughening furnace system ) 是由 李肖妍 牛桃霞 仵小曦 王楠 李靖波 于 2021-09-27 设计创作，主要内容包括：本发明公开一种复合化学钢化玻璃的制备方法及及钢化炉系统,将待处理玻璃进行预热处理,盐浴进行离子交换处理,得到第一前驱体；对第一前驱体进行退火,洗盐,烘干,得到第二前驱体；重复上述步骤m次,得到复合化学钢化玻璃；本发明的钢化炉系统包括两个预热/退火/烘干炉、多个钢化炉、洗盐炉和搬运机构,所述钢化炉和洗盐炉独立设置,所述预热/退火/烘干炉设置在钢化炉和洗盐炉的上方,所述多个钢化炉分为m组,用于对玻璃进行m次离子交换处理,本发明在解放人力的同时,提高了玻璃的钢化效果,并且提高盐浴的使用寿命。(The invention discloses a preparation method of composite chemical toughened glass and a toughening furnace system, wherein the glass to be treated is subjected to preheating treatment, and salt bath is subjected to ion exchange treatment to obtain a first precursor; annealing, washing salt and drying the first precursor to obtain a second precursor; repeating the steps for m times to obtain the composite chemical toughened glass; the toughening furnace system comprises two preheating/annealing/drying furnaces, a plurality of toughening furnaces, salt washing furnaces and a carrying mechanism, wherein the toughening furnaces and the salt washing furnaces are independently arranged, the preheating/annealing/drying furnaces are arranged above the toughening furnaces and the salt washing furnaces, and the plurality of toughening furnaces are divided into m groups and used for carrying out ion exchange treatment on glass for m times.)

1. The preparation method of the composite chemically toughened glass is characterized by comprising the following specific steps of:

s1, preheating glass to be treated, and performing ion exchange treatment on a salt bath to obtain a first precursor;

s2, annealing the first precursor, washing salt, and drying to obtain a second precursor;

s3 repeating step S1 and step S2 m times to obtain the composite chemically toughened glass.

2. The method for preparing composite chemically toughened glass according to claim 1, wherein in step S3, m is the number of times that the same glass is chemically toughened, and the value of m is 1-4.

3. The method of claim 1, wherein in step S1, the salt used in the salt bath is determined according to the strengthening temperature required for the glass and the melting point and decomposition temperature of the corresponding salt.

4. The method for preparing composite chemically toughened glass according to claim 1, wherein in step S2, the annealing temperature is 350-380 ℃ and the annealing time is 30-60 min; the temperature of the salt washing is 40-60 ℃, and the time is 10-30 min; the drying temperature is 350-380 ℃ and the drying time is 10-30 min.

5. The method of claim 1, wherein in step S2, pure water is used for the salt washing.

6. The toughening furnace system for preparing the composite chemically toughened glass is characterized by comprising two preheating/annealing/drying furnaces, a plurality of toughening furnaces, a salt washing furnace and a carrying mechanism, wherein the toughening furnaces and the salt washing furnace are independently arranged, the preheating/annealing/drying furnaces are arranged above the toughening furnaces and the salt washing furnace, and the plurality of toughening furnaces are divided into m groups and used for carrying out ion exchange treatment on the glass for m times; the preheating/annealing/drying furnace is used for carrying out preheating treatment, toughening treatment and drying treatment after salt washing on the glass; the salt washing furnace is used for washing salt attached to the surface of the tempered glass; the carrying mechanism is used for putting the glass to be tempered/cleaned into or taking out each tempering furnace.

7. The toughening furnace system for producing composite chemically toughened glass according to claim 6, wherein the handling mechanism is a mechanical gripper.

8. The toughening furnace system for manufacturing composite chemically toughened glass according to claim 6, further comprising an automatic control unit for controlling the carrying mechanism.

9. The toughening furnace system for preparing composite chemically toughened glass according to claim 6, further comprising a temperature control unit for adjusting the temperatures of the preheating/annealing/drying furnace, the toughening furnace and the salt washing furnace by the temperature control unit.

10. The toughening furnace system for preparing composite chemically toughened glass according to claim 6, further comprising a drying control unit for automatically adjusting the preheating/annealing/drying furnace to dry the glass.

Technical Field

The invention belongs to the technical field of glass manufacturing, and particularly belongs to a preparation method of composite chemical toughened glass and a toughening furnace system.

Background

Glass is a brittle material and microcracks exist on the surface of the glass, and therefore, the glass has low resistance to bending and impact. The chemical toughening is to replace ions with smaller radius in the glass with ions with larger radius in the salt bath, and the surface of the chemically toughened glass forms a compressive stress layer, so that the strength, heat resistance, mechanical property and the like of the chemically toughened glass can be obviously improved. In addition, after the glass is tempered, the micro-cracks on the surface of the glass can become finer and even be healed under the extrusion action due to the existence of larger compressive stress on the surface.

The existing glass toughening process adopts a semi-automatic mode and manual salt washing. The three furnaces are arranged in an inverted 'article' shape, as shown in figure 1, the glass to be toughened is put into and taken out from the three furnaces by a manipulator controlled by a program, firstly, the glass to be toughened is put into a preheating furnace, the manipulator puts the glass to be toughened into a toughening furnace for first ion exchange treatment after preheating, the manipulator puts the glass into an annealing furnace for cooling and annealing after toughening is finished, and the glass after first-step chemical toughening is taken out by an operator after annealing is finished, and salt washing operation is carried out by clean water. The second tempering step is repeated as the first step. The middle salt washing process is long in time and needs personnel to participate, so that the waste of manpower, time and resources is caused.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a preparation method of composite chemical toughened glass and a toughening furnace system, aiming at achieving high efficiency in work, releasing manpower, optimizing the toughening effect and prolonging the service life of salt bath.

In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of composite chemically toughened glass comprises the following specific steps:

s1, preheating glass to be treated, and performing ion exchange treatment on a salt bath to obtain a first precursor;

s2, annealing the first precursor, washing salt, and drying to obtain a second precursor;

s3 repeating step S1 and step S2 m times to obtain the composite chemically toughened glass.

Further, in step S3, m is the number of times of chemical tempering the same glass, and the value of m is 1-4.

Further, in step S1, the type of salt used in the salt bath is determined according to the desired strengthening temperature of the glass and the melting point and decomposition temperature of the corresponding salt.

Further, in step S2, the annealing temperature is 350 to 380 ℃ and the annealing time is 30 to 60 min; the temperature of the salt washing is 40-60 ℃, and the time is 10-30 min; the drying temperature is 350-380 ℃ and the drying time is 10-30 min.

Further, in step S2, pure water is used for salt washing.

The invention also provides a toughening furnace system for preparing the composite chemical toughened glass, which comprises two preheating/annealing/drying furnaces, a plurality of toughening furnaces, a salt washing furnace and a carrying mechanism, wherein the toughening furnaces and the salt washing furnace are independently arranged, the preheating/annealing/drying furnaces are arranged above the toughening furnaces and the salt washing furnace, and the plurality of toughening furnaces are divided into m groups and used for carrying out ion exchange treatment on the glass for m times; the preheating/annealing/drying furnace is used for carrying out preheating treatment, toughening treatment and drying treatment after salt washing on the glass; the salt washing furnace is used for washing salt attached to the surface of the tempered glass; the carrying mechanism is used for putting the glass to be toughened/cleaned into or taking the glass out of each toughening furnace;

further, the carrying mechanism is a mechanical gripper.

Further, the automatic conveying device further comprises an automatic control unit, and the automatic control unit is used for controlling the conveying mechanism.

Further, the device also comprises a temperature control unit, wherein the temperature control unit is used for adjusting the temperatures of the preheating/annealing/drying furnace, the toughening furnace and the salt washing furnace.

Further, the glass drying device further comprises a drying control unit, and the drying control unit is used for automatically adjusting the preheating/annealing/drying furnace to dry the glass.

Compared with the prior art, the invention has at least the following beneficial effects:

the invention provides a preparation method of composite chemical toughened glass, which comprises the following steps of preheating glass for m times → ion exchange → annealing → salt washing → drying, and achieves the purpose of gradually increasing the stress and the strength of the glass; the system is provided with the salt washing furnace, the ion-exchanged glass and the salt used for ion exchange attached to the toughening frame are washed, the condition that the glass which is not subjected to salt washing treatment directly enters subsequent toughening is avoided, salt bath pollution is caused, the service life of the salt used for subsequent toughening is prolonged in the salt washing process, and the toughening effect is further improved.

Drawings

FIG. 1 is a block diagram of a prior art semi-automatic, manual salt-washing tempering system;

fig. 2 is a structural diagram of a glass composite chemical tempering furnace system according to an embodiment of the present invention.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

The invention provides a glass composite chemical toughening furnace system, which is used for implementing efficient and full-automatic toughening on glass.

FIG. 2 is a schematic view of a glass composite chemical toughening furnace system according to the present invention, which includes two preheating/annealing/drying furnaces, a plurality of toughening furnaces for chemical toughening treatment of glass, a salt washing furnace for cleaning glass, and a carrying mechanism for putting the glass to be toughened/cleaned into or taking out each toughening furnace, wherein the plurality of toughening furnaces and the salt washing furnace are independently arranged, and the preheating/annealing/drying furnaces are arranged above the toughening furnaces and the salt washing furnace.

The preheating/annealing/drying furnace is a multipurpose furnace and can be used for preheating the glass before tempering and drying the glass after tempering and salt washing.

The toughening furnaces are divided into m groups and used for carrying out salt bath ion exchange treatment on the glass for m times, wherein m is the number of times of chemical toughening of the same glass, and the value of m is 1-4.

Pure water is filled in the salt washing furnace and is used for salt washing treatment of the toughened glass.

A carrying mechanism for putting the glass to be toughened/cleaned into and taking the glass out of each toughening furnace;

an automatic control unit for controlling the movement of the conveying mechanism;

and the temperature control unit can automatically adjust the temperatures of the preheating/annealing/drying furnace, the toughening furnace and the salt washing furnace.

A drying control unit for automatically adjusting the preheating/annealing/drying furnace.

The process of the glass composite chemical toughening is preheating → first ion exchange → annealing → salt washing → preheating → mth ion exchange → annealing → salt washing.

In addition, the salt washing furnace is arranged in the invention and is used for cleaning the glass subjected to the ion exchange treatment for m times and the salt used for the ion exchange attached to the toughening frame, so that the condition that the glass not subjected to the salt washing treatment directly enters the ion exchange treatment for m-1 times for toughening is avoided, the subsequent salt bath is polluted, the service life of the salt used for subsequent toughening is prolonged in the salt washing process, and the toughening effect is improved.

Further, the glass chemical tempering furnace system also comprises a carrying mechanism such as a mechanical gripper for putting in and taking out glass, an automatic control unit for controlling the carrying mechanism, a temperature control unit capable of automatically adjusting the temperatures of the preheating/annealing/drying furnace, the tempering furnace and the salt washing furnace, and a drying control unit capable of automatically adjusting the preheating/annealing/drying furnace.

The method for preparing the composite chemically toughened glass comprises the following steps:

s1: preheating glass to be treated in a preheating/annealing/drying furnace;

s2: and (3) putting the glass preheated in the S1 into a toughening furnace of a salt bath required by the first ion exchange for chemical toughening treatment, and containing sodium ion-containing salts in a plurality of toughening furnaces for the first ion exchange for exchanging lithium ions in glass components.

S3: putting the chemically toughened glass in the step S2 into a preheating/annealing/drying furnace for annealing at 350-380 ℃ for 30-60 min;

s4: putting the glass annealed in the S3 into a salt washing furnace, and washing salt in pure water at 40-60 ℃ for 10-30 min;

s5: putting the glass washed with the salt in the S4 into a preheating/annealing/drying furnace for drying treatment, wherein the drying temperature is 350-380 ℃ and the drying time is 10-30 min;

s6: putting the glass dried in the step S5 into a preheating/annealing/drying furnace for preheating treatment before secondary toughening;

s7: placing the glass preheated in the S6 into a tempering furnace of salt bath required by the second ion exchange for the second chemical tempering treatment, wherein the tempering furnaces for the second ion exchange contain salts containing potassium ions for exchanging lithium ions and sodium ions in glass components;

s8: putting the glass subjected to the chemical toughening treatment in the step S7 into a preheating/annealing/drying furnace for annealing treatment under the same annealing condition as the step S3;

s9: putting the glass annealed in the step S8 into a salt washing furnace for salt washing, wherein the salt washing conditions are the same as the step S4;

s10: putting the glass washed with the salt in the step S9 into a preheating/annealing/drying furnace for drying treatment under the same drying condition as the step S5;

s11: putting the glass dried in the step S10 into a preheating/annealing/drying furnace for preheating treatment before the mth tempering;

s12: putting the glass preheated in the S11 into a tempering furnace of salt bath required by the mth ion exchange for the mth chemical tempering treatment, and containing salts containing ions with larger radius in a plurality of tempering furnaces for the mth ion exchange for replacing the ions with smaller radius in the glass;

s13: putting the glass subjected to the chemical toughening treatment in the step S12 into a preheating/annealing/drying furnace for annealing treatment under the same annealing condition as the step S3;

s14: putting the glass annealed in the step S13 into a salt washing furnace for salt washing, wherein the salt washing conditions are the same as the step S4;

s15: putting the glass washed with the salt in the step S14 into a preheating/annealing/drying furnace for drying treatment under the same drying condition as the step S5 to obtain composite chemical toughened glass;

the m is the number of times of chemical toughening of the same glass.

Preferably, the type of salt used for ion exchange in the salt bath is determined by the desired strengthening temperature of the glass and the melting and decomposition temperatures of the corresponding salt (chloride, nitrate or sulfate); when salt bath is carried out, the particle radius of the salt used for ion exchange used in the next salt bath is larger than that of the salt used for ion exchange used in the last salt bath.

The above description is only exemplary of the invention and is not intended to limit the invention, which is defined by the appended claims.