CN114014555A

CN114014555A - Glass thinning device, continuous production line and method

Info

Publication number: CN114014555A
Application number: CN202111346957.8A
Authority: CN
Inventors: 应悦; 应盛荣; 周贞锋; 董寒杰; 刘昌文; 闻涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-02-08

Abstract

The invention relates to a glass thinning device, a continuous production line and a method, wherein the thinning device comprises an acid liquor spraying device; cleaning the spraying device; a wind power assembly; the acid liquor spraying device and the cleaning spraying device respectively comprise a plurality of spraying rods, and the spraying rods can swing back and forth along the advancing direction of the glass material so as to ensure that the acid liquor or the cleaning solvent is more uniform in the spraying process. The production line consists of several thinning apparatuses. The glass panel is supported by the horizontal riding wheels without manual insertion, the stress area is increased by several times, the size of the glass panel is increased, the supporting area is also increased, and the condition of damage under the action of gravity is eliminated; the hoisting and switching are not needed, and the yield can be improved to more than 99.5 percent; safe, environment-friendly, efficient and unmanned operation in the etching process of the glass panel is realized; can etch glass panels of each generation, and the adaptability is greatly improved.

Description

Glass thinning device, continuous production line and method

Technical Field

The invention relates to the field of glass thinning equipment, in particular to a glass thinning device, a continuous production line and a method.

Background

In the production process of the panel display, in order to reduce the thickness and weight of the display, a chemical etching method is often adopted, and a glass layer is etched off by mixing acid liquor to thin the glass layer or remove foreign matters on the surface.

In the glass production process, a chemical etching method is also adopted to reduce the thickness of the glass, eliminate the surface defects of the glass and reduce the weight of the glass. In the production process of the silicon chip, an oxide layer on the surface of the silicon chip is removed and the surface defects of the silicon chip are eliminated by a chemical etching method.

At present, two types of etching equipment are applied in production, wherein one type of etching equipment is soaking type etching equipment, and the other type of etching equipment is spraying type etching equipment.

The immersion etching equipment is a cabinet type container, and etching acid liquid can be stored in the container. Objects (glass, display panels, silicon wafers and the like) to be etched are orderly arranged on an inserting piece frame and are directly immersed into etching acid liquor; after a period of time, the article is removed and washed with water to obtain a thinned article. The immersion etching equipment has the following defects:

1) the size of the object cannot be too large. Too large an object, the insertion is difficult; the difficulty of immersion and removal is also great. 2) Intermittent operation and low production efficiency. 3) And the labor intensity is high. 4) And because an operator needs to contact acid liquor, the working environment is poor, and the safety protection requirement is high. 5) The object has high breaking rate. 6) The product quality is difficult to ensure; because the lower part of the object is contacted with the acid solution first during immersion and the upper part of the object is separated from the acid solution first during removal, the etching time difference is caused, and the thickness of the object is uneven. 7) White powdery precipitates generated by etching are easily adhered to the lower end of the glass substrate.

The spray etching equipment is also a cabinet container, and a plurality of acid liquor spray heads are arranged in the cabinet container. Objects (glass, display panels, silicon wafers and the like) to be etched are arranged in order on an inserting sheet frame and are directly placed into a cabinet type container; the acid liquor spraying is started, and the acid liquor is uniformly sprayed on the object. After a period of time, the article is removed and washed with water to obtain a thinned article. The spraying mode includes top spraying mode, side spraying mode and top side spraying mode. Compared with the soaking type etching equipment, the defects of the spraying type etching equipment have the advantage that the etching quality is improved. But the spray etching equipment has the following defects:

1) the size of the object cannot be too large. Too large an object, the insertion is difficult; the difficulty of immersion and removal is also great. 2) Intermittent operation and low production efficiency. 3) And the labor intensity is high. 4) And because an operator needs to contact acid liquor, the working environment is poor, and the safety protection requirement is high. 5) The object breaking rate is higher. This is probably because the etched glass is too thin (only 0.15-0.3 mm) and is more likely to be broken by the impact of the spray. 6) And the side-spraying type is adopted, so that the number of processed sheets is small, and only one sheet or two sheets can be processed at a time. 7) And the top spraying type is adopted, and vertical strip-shaped concave-convex grains are easily caused on the surface of an object due to the uncertain line of the sprayed liquid flowing from top to bottom.

In CN 111662014 a, magnolia et al proposed a thinning apparatus for glass; including the sculpture case, the sculpture incasement is equipped with chemical etching liquid, and the sculpture incasement sets up a plurality of fixing device who is used for fixed glass along the length direction interval, and fixing device sets up the fixed subassembly in sculpture case both sides including the symmetry, and two pairs of cardboards are at least fixed to the subassembly, and two pairs of cardboards are at least by last to lower interval arrangement, and the card of every pair of cardboard is held the lateral symmetry and is equipped with the elastic component that is used for extrudeing fixed glass, and the elastic component surface scribbles the anticorrosive coating. According to the invention, the glass substrate is fixed by the clamping plates arranged at intervals and the elastic pieces arranged on the clamping plates, so that the contact area with the glass substrate can be reduced, and meanwhile, the circulation of etching liquid is improved, and the thicknesses of the two side edges of the thinned glass are basically consistent. The device belongs to immersion etching equipment, and improves a glass inserting rack; but the disadvantages of immersion etching equipment still exist.

In CN 112358194A, Penshou et al propose an extremely thin glass etching and thinning device and method; the method comprises the following steps: the glass clamping frames comprise clamping discs arranged at two ends, and waterfall flow baffle grooves of the clamping discs at two sides are connected through a flow baffle plate; the plurality of movable shafts are movably inserted on the same drawing connecting rod; the two ends of the plurality of glass clamping frames are movably arranged on the two sides of the thinning etching box through sealing bearings; the invention relates to a cascade flow type etching device, which comprises a cascade flow spraying plate, wherein a plurality of spraying heads are arranged at the bottom of the cascade flow spraying plate in an array manner. The device and the method belong to spray type etching equipment and have various defects of the spray type etching equipment.

In the patent CN 106082687B, the li art proposes a glass thinning method and device; comprises the following steps: s1, providing glass to be thinned; s2, adopting acidic corrosive liquid to corrode the to-be-thinned surface of the glass, and scraping the to-be-thinned surface of the glass by utilizing a friction mechanism in relative motion with the glass while corroding the glass. The glass thinning method provided by the invention can remove impurities and stains on the surface of the glass, reduce the depression on the surface of the glass, ensure the uniformity of glass thickness thinning and level the surface of the glass. The device belongs to immersion type etching and grinding equipment; most of the defects of the immersion etching equipment still exist. Although grinding methods are proposed to improve the product quality; however, the production efficiency is extremely low, and etching and polishing can be performed only one by one.

In CN 108227257B, tianwei proposed a thinning apparatus and thinning method; utilize and bear the fixed display panel of device, utilize height adjusting device to adjust the distance between the erosion liquid in display panel and the liquid storehouse, through the first base plate staged and the erosion liquid contact that makes display panel, progressively attenuate first base plate, wherein, realize preliminary attenuate at first attenuate stage, realize quick attenuate at the second attenuate stage, realize little attenuate at the third attenuate stage, defect on the first base plate can not too early be corroded by erosion liquid completely like this, thereby avoid defect amplification, it is corresponding, need not additionally to carry out the polishing process and can eliminate the concave point on display panel surface, bad such as fish tail, simplify display panel attenuate process, and can avoid the piece problem that the polishing process produced, thereby increase the product yield, improve display effect. The device belongs to immersion etching equipment, and the thinning is divided into a plurality of stages, and the thinning speed of different stages is adjusted by adjusting the contact time and the contact angle of acid liquor and a panel. But the disadvantages of immersion etching equipment still exist.

In patent CN 109942203 a, wajia crystal proposes a glass thinning apparatus and a use method; the glass processing fixture comprises an etching area, a positioning area and a positioning area, wherein the etching area is used for thinning a plurality of pieces of glass vertically accommodated in the glass processing fixture; the washing area is used for cleaning the glass on the glass processing jig before thinning and cleaning the glass after thinning; the conversion area is used for loading the glass processing jig to be thinned into the washing area and unloading the thinned glass processing jig from the washing area to the outside; the braking assembly is used for moving the glass processing jig before the thinning from the conversion area to the etching area through the washing area and moving the glass processing jig after the thinning from the etching area to the conversion area through the washing area; the washing area is arranged between the conversion area and the etching area; the glass thinning production line adopts the mode of spraying thinning to thin the glass vertically contained in the glass processing jig, can realize single multi-disc glass thinning, and avoids the problem that reaction products adhere to glass to cause defective products in the soaking type thinning method. The device belongs to immersion etching equipment, and improves a glass inserting rack and a tool for converting glass from an etching area to a cleaning area. But the disadvantages of immersion etching equipment still exist.

In CN 109879601A, Wajian crystal proposes a glass thinning production line and a use method; the device comprises a conversion area, a washing area and an etching area, wherein both ends of the washing area and the etching area are arranged on the conversion area, and a feeding end and a discharging end are arranged on the conversion area; a plurality of glasses accommodated vertically in the glass thinning jig are loaded into the converting zone through the feed end, pre-thinning cleaning is performed in the rinsing zone and thinning processing is performed in the etching zone, and the thinned glass can enter the rinsing zone through the converting zone again to be subjected to post-thinning cleaning and is unloaded to the outside through the discharge end of the converting zone. Glass attenuate production line adopts the mode that sprays the attenuate to carry out the attenuate processing to the vertical glass that holds in glass attenuate tool, can realize the thinning of single multi-disc glass, avoids reaction product adhesion to cause the problem of defective products on glass in the soaking formula attenuate method simultaneously. The device belongs to immersion etching equipment, and provides a concept of a conversion area, a rinsing area and an etching area and an area conversion tool. But the disadvantages of immersion etching equipment still exist.

In CN 103880295B, zhangxun et al proposed a glass thinning apparatus and a glass thinning method; the glass thinning equipment comprises a box body and a spraying device arranged in the box body, wherein a first spraying groove, a first etching groove, a second etching groove, a third etching groove, a second spraying groove, a third spraying groove, a fourth spraying groove and a drying groove are sequentially arranged in the box body, and the spraying device comprises a first spraying pipe, a second spraying pipe, a third spraying pipe, a fourth spraying pipe, a fifth spraying pipe, a sixth spraying pipe and a seventh spraying pipe which are respectively positioned above the bottoms of the first spraying groove, the first etching groove, the second etching groove, the third etching groove, the second spraying groove, the third spraying groove, the fourth spraying groove and the fourth spraying groove. The thinning method for spraying, washing and etching in different grooves by using the glass thinning equipment can avoid the problem that reaction products in the immersion type thinning method are adhered to glass, and the problem of uneven immersion type etching is avoided by sequentially carrying out three times of etching in the first etching groove, the second etching groove and the third etching groove. The device belongs to immersion etching equipment, and divides an immersion groove into a plurality of grooves to perform functional positioning on each groove. But the disadvantages of immersion etching equipment still exist.

In CN 106145689 a, zhan yi proposes a glass thinning apparatus; the method comprises the following steps: a chamber, the chamber comprising: a loading zone and a rinsing zone arranged in the loading channel; an etching region in which thinning processing is applied to the glass loaded along the loading channel; and a rinsing zone and an unloading zone arranged in the unloading channel through which the glass subjected to the thinning process is taken out; a cassette arranged to be movable within the chamber and to vertically accommodate at least one glass sheet; a main thickness gauge disposed in the etching region of the chamber and measuring a thickness of the glass subjected to the thinning process in real time; and a controller that stops the thinning process performed on the glass and controls the cassette to move along the unloading path if the thickness of the glass measured by the main thickness gauge reaches a target thickness. The equipment belongs to immersion etching equipment. In order to improve the accuracy of the target thickness, in the etching region where the thinning process is applied to the glass, a main thickness gauge capable of measuring the thickness of the glass in real time is provided. But the disadvantages of immersion etching equipment still exist.

With the development of technology and diversification of market demands, display panels become larger, and as can be seen from table 1 "size of glass substrate for each generation line", the size of glass panels becomes larger. When the size of the glass panel reaches a certain degree, the existing etching equipment can not meet the production requirement.

Aiming at the defects of the prior art and equipment, the invention aims to provide an automatic and continuous glass thinning device which aims at large-area glass panels and can improve the production efficiency and the glass thinning quality and smoothness, and has low breakage rate.

Disclosure of Invention

The invention provides a glass thinning device, a continuous production line and a method, which are used for solving the problems of thinning of a large-area glass panel, easiness in breakage in the thinning process, quality after thinning, production efficiency and waste liquid treatment in the thinning process in the prior art.

The technical problem solved by the invention is realized by adopting the following technical scheme:

a glass thinning apparatus comprising:

a machine frame, a plurality of guide rails and a plurality of guide rails,

the conveying device is arranged on the rack and used for horizontally conveying the glass materials to be thinned;

the acid liquor spraying device is positioned above and/or below the conveying device, sprays acid liquor on the glass material, and enables the acid liquor to fully cover the surface of the glass material so as to realize acid etching and thinning of the glass material;

the cleaning and spraying device is positioned above and/or below the conveying device, sprays a cleaning solvent on the glass material, and enables the cleaning solvent to fully cover the surface of the glass material so as to clean the glass material;

the wind power assembly is positioned above and/or below the conveying device and is arranged at the rear side of the acid liquor spraying device or the cleaning spraying device so as to clean and blow-dry the glass materials;

the acid liquor spraying device and the cleaning spraying device respectively comprise a plurality of spraying rods, and the spraying rods can swing back and forth along the advancing direction of the glass material so as to ensure that the acid liquor or the cleaning solvent is more uniform in the spraying process.

In some embodiments, the acid liquor spraying device comprises a conveying device, a cleaning spraying device and a wind power assembly, wherein the conveying device is arranged on the inner side of the acid liquor spraying device, the cleaning spraying device and the wind power assembly are covered by the outer shell, so that acid liquor or acid gas leakage is reduced, and micro negative pressure is formed in the outer shell.

In some embodiments, the washing device further comprises an alkali liquor spraying device, wherein the alkali liquor spraying device is positioned between the pickling spraying device and the cleaning spraying device; the alkali liquor spraying device comprises a plurality of spraying rods, and the spraying rods can swing back and forth along the advancing direction of the glass materials so as to ensure that alkali liquor is more uniform in the spraying process.

In some embodiments, the number of the spray bars on the alkali liquor spray device is 2-3, and the distance between two adjacent spray bars is 100-200 mm.

In some embodiments, the acid liquor spraying device further comprises an acid liquor recovery unit, wherein the acid liquor recovery unit is located below the acid liquor spraying device and is used for recovering acid liquor and recycling the acid liquor.

In some embodiments, the acid liquor recovery unit further comprises a solid-liquid separation unit for separating solid suspended matters, the solid-liquid separation unit comprises a plurality of stages of sequentially connected settling tanks, and the number of the settling tanks is 2-6.

In some embodiments, the solid-liquid separation unit is a cyclone separator.

In some embodiments, the spray bar has a width that is no less than the width of the glass frit.

In some embodiments, the width of the spray bar is 100-500 mm greater than the width of the glass material.

In some embodiments, a plurality of spray heads are arranged on the spray rod, and the area of a liquid drop formed by the spray heads is not smaller than the area of the glass material.

In some embodiments, 10-20 spray headers are arranged on each spray rod, the spray headers are distributed at equal intervals, and the intervals of the spray headers are 100-200 mm.

In some embodiments, the number of spray bars on the acid spray device is 1-15;

in the pretreatment process, the number of the spray rods is 2-3 spray rods;

in the acid etching process, the number of the spray rods is 6-9 spray rods.

In some embodiments, the distance between two adjacent spray bars is 100-200 mm.

In some embodiments, the distance between the spray bar above the glass panel and the glass panel is 80-250 mm; the distance between the spray rod and the glass panel is 30-90 mm and is located below the glass panel.

In some embodiments, the conveying device includes a plurality of idler rods horizontally arranged and driven by a power mechanism, a plurality of idlers are distributed on each idler rod and are distributed at equal intervals to support the glass material, from left to right, a contact point of the idlers and the glass material forms an arc-shaped curve, a high point of the curve is located in the middle of the idler rod, and low points of the curve are located on two sides of the idler rod.

In some embodiments, the line between the high and low points of the curve makes an angle with the horizontal of less than 5 °, preferably between 2 ° and 4 °.

In some embodiments, the distance between two adjacent idler rods is 60 mm-200 mm.

In some embodiments, the distance between two adjacent riding wheels is 50 mm-300 mm.

In some embodiments, the moving speed of the conveying device in the horizontal direction is 0.5-3 m/min.

The invention also provides a continuous full-automatic glass panel thinning production line which comprises the glass thinning device, wherein the glass thinning device comprises a plurality of acid liquor spraying devices, cleaning spraying devices and wind power components which are arranged at intervals;

or,

comprises a plurality of acid liquor spraying devices, alkaline washing spraying devices, cleaning spraying devices and wind power components which are arranged at intervals.

In order to realize the detection of the product, the glass material thinning device also comprises a product detection section, when the thinned glass material enters the product detection section, the thickness and surface quality detection is carried out, and the qualified product moves to the next procedure or enters a packaging line; the rejected product is removed from the conveyor belt to a reject lane.

The invention also provides a method for thinning a glass panel by using the continuous full-automatic glass panel thinning production line, which comprises the following steps of placing glass or a display panel on the conveying device which moves horizontally:

(1) pretreatment step

Preparing pretreatment acid liquid by using concentrated sulfuric acid and hydrofluoric acid, wherein the sulfuric acid content is 65-75%, and the hydrofluoric acid content is 3-8%;

the glass or the display panel is moved to a pretreatment acid liquid spraying section, the pretreatment acid liquid is sprayed on the surface of the glass or the display panel needing thinning, after 1-10 min, the glass or the display panel is moved to a clear water spraying section, after being sprayed with clear water, the clear water enters a water blowing section of a wind power assembly, and the washing water is blown back to the clear water spraying section from the surface of the glass or the display panel by the wind power assembly;

(2) thinning process

Preparing a thinning acid solution by using hydrochloric acid and hydrofluoric acid, wherein the content of the hydrochloric acid is 10-25%, and the content of the hydrofluoric acid is 10-30%;

the glass or the display panel is moved to a thinning acid liquor spraying section, the thinning acid liquor is sprayed on the surface of the glass of the panel needing thinning, after 5-60 min, the glass or the display panel is moved to a clear water spraying section, after being washed by clear water, the clear water enters a water blowing section of the wind power assembly, the wind power assembly blows washing water from the surface of the glass or the display panel back to the clear water spraying section, and the glass or the display panel is continuously dried.

In some embodiments, the thinning process may be performed more than 2 times as needed.

In some embodiments, the cleaned spent acid solution is output to an acid solution recovery unit, and the spent acid solution is regenerated and returned to the production line. Wherein the regeneration treatment is to remove part of silicon dioxide and part of alkali metal salt in the waste acid liquor.

In some embodiments, the method further comprises an alkaline washing step, wherein a neutralized alkali liquor is prepared from sodium carbonate or caustic soda, and the concentration of the alkali liquor is 2-10%;

the glass or the display panel moves to an alkali liquor neutralizing and spraying section, alkali liquor is sprayed on the surface of the glass of the panel needing thinning, after 1-10 min, the glass or the display panel moves to a clear water spraying section, after being washed by clear water, the clear water enters a water blowing section of the wind power assembly, the wind power assembly blows washing water back to the clear water spraying section from the surface of the glass or the display panel, and the glass or the display panel is continuously dried.

The alkali washing step is optional, some glass has strong acid carrying capacity after acid washing, acid liquor cannot be washed away completely by water washing, the acid liquor can be effectively neutralized by adding a section of alkali washing, and then the alkali liquor is washed away by water washing.

The invention has the beneficial effects that:

(1) in the prior art, the glass panel needs to be manually inserted into the positioning groove, so that the size of the glass panel is limited (no manual insertion is needed when the size is too large); the bottom edge of the glass panel inserted into the groove is stressed, and the glass panel is damaged under the action of self gravity due to the fact that the glass panel is too large in size or too thin in thickness after being etched; this technique need not artifical inserted sheet, and glass panels is that horizontal riding wheel supports, and the lifting surface area increases several times, and glass panels size increases, and the lifting surface area also increases, has eliminated the damaged condition under the dead weight effect.

(2) In the prior art, the whole etching process is finished, the glass panel needs to be switched among a soaking tank, an etching tank and a cleaning tank for a plurality of times, and the risk of breakage of the glass panel is brought about by each time of hoisting and switching, so that the yield of the etched glass panel is about 90 percent; the invention does not need the hoisting and switching, and the yield can be improved to more than 99.5 percent.

(3) Upgrading from prior art glass etching intermittent manual operation to continuous automated operation; the safe, environment-friendly, efficient and unmanned operation of the glass panel etching process is realized.

(4) The prior art can only etch G5.5 generation and following generation glass panels, and the invention can etch glass panels of each generation, thereby greatly improving the adaptability.

(5) The 'glass slag' generated in the etching process is a solid precipitate, and if the 'glass slag' is adhered to a glass panel, the quality defect of uneven etching can be caused; the solid-liquid separation unit can remove the glass slag generated by etching in time, thereby greatly reducing the possibility of generating quality defects.

(6) The acid liquor spraying device can adjust the components of the etching acid liquor at any time so as to meet the requirements of different glass materials; in addition, the supplement of consumed acid can be adjusted in time in the etching process, and the service life of the acid etching solution is greatly prolonged.

(7) The invention is combined with the acid liquor recovery unit, and the acid liquor recovery unit can remove part of fluosilicic acid and part of alkali metal salt in the waste acid liquor in time, so that the acid liquor is regenerated and returns to the device again. The waste acid can be recycled, so that the waste of fluorine resources can be saved, and the production cost in the etching process is greatly reduced.

(8) The invention adopts a quality inspection instrument, can find etching defective products in time, reduces labor and time for manual detection, and improves working efficiency.

Drawings

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

FIG. 1 is a drawing of the present invention: a schematic structural view of a glass thinning apparatus of example 1;

FIG. 2 is a drawing of the present invention: a schematic structural view of an acid spray device of the glass thinning apparatus in example 1;

FIG. 3 is a drawing of the present invention: a schematic structural view of a cleaning spray device of a glass thinning apparatus in embodiment 1;

FIG. 4 is a drawing of the present invention: a schematic structural view of a riding wheel rod of a glass thinning apparatus in example 1;

FIG. 5 is a drawing of the present invention: a schematic structural view of a spray bar of a glass thinning apparatus in example 1;

FIG. 6 is a drawing of the present invention: a schematic structural view of a glass thinning apparatus of example 2;

FIG. 7 is a drawing of the present invention: a schematic structural diagram of an alkali liquor spraying device of the glass thinning apparatus in embodiment 2;

FIG. 8 is a drawing of the present invention: embodiment 3 is a schematic diagram of a continuous full-automatic glass material thinning production line;

FIG. 9 is a drawing of the present invention: the structure schematic diagram of a continuous full-automatic glass material thinning production line in embodiment 3;

wherein: the machine frame 100, the conveying device 200, the acid liquor spraying device 300, the cleaning spraying device 400, the wind power assembly 500, the alkali liquor spraying device 600, the acid liquor recovery unit 700, and the alkali liquor recovery unit 800

The housing 110, the idler rod 210, the idler 211, the spray rod 310, the spray header 311, the solid-liquid separation unit 710, and the settling tank 711 are filled with glass materials 999.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Example 1

Referring to fig. 1-5, a glass thinning apparatus 1000, comprising: a frame 100, a conveying device 200, an acid liquor spraying device 300, a cleaning spraying device 400 and a wind power assembly 500.

Wherein, the conveying device 200 of the invention is arranged on the frame 100 and used for horizontally conveying the glass material 999 to be thinned; the conveying device 200 comprises a plurality of supporting roller rods 210 which are horizontally arranged and driven by a power mechanism, and a plurality of supporting rollers 211 which are distributed on each supporting roller rod 210 at equal intervals and used for supporting the glass materials 999. Because the conveying device 200 with the riding wheel type structure is adopted, the glass material 999 is horizontally placed on the riding wheel 211, the stress area can be effectively reduced, the size of the glass material 999 is increased, and the condition that the glass material 999 is damaged under the action of self gravity can be eliminated by the riding wheel 211.

In order to ensure that the glass material 999 keeps neat on the conveying device 200, 2 flexible barrier strips are respectively installed on two sides of the conveying device 200, when the glass material 999 passes through the flexible barrier strips, the flexible barrier strips arrange the glass material 999 to the middle position, and the glass material is transmitted to the subsequent process in an orderly state.

The conveyor 200 of the present invention is driven by a motor.

The acid liquor spraying device 300 is located above and/or below the conveying device 200, sprays acid liquor on the glass material 999, and enables the acid liquor to fully cover the surface of the glass material 999, so that the acid corrosion and thinning of the glass material 999 are achieved.

The cleaning spraying device 400 is positioned above and/or below the conveying device 200, and sprays the cleaning solvent on the glass material 999, so that the cleaning solvent is fully covered on the surface of the glass material 999, and the glass material 999 is cleaned.

The wind power assembly 500 of the present invention is located above and/or below the conveying device 200 and is disposed at the rear side of the acid liquor spraying device 300 or the cleaning spraying device 400, and the cleaning and drying of the glass material 999 can be realized by the compressed gas generated by the wind power assembly.

The acid liquor spraying device 300 and the cleaning spraying device 400 both comprise a plurality of spraying rods 310, and the spraying rods 310 can swing back and forth along the advancing direction of the glass material 999, so that the acid liquor or the cleaning solvent is more uniform in the spraying process.

More specifically, the riding wheels 211 on each riding wheel rod 210 in the present invention adopt a special arrangement, such as: from left to right, the contact point of the riding wheel 211 and the glass material 999 forms an arc-shaped curve, the high point of the curve is located in the middle of the riding wheel rod 210, and the low point of the curve is located on two sides of the riding wheel rod 210. Wherein the angle between the line connecting the high point and the low point of the curve and the horizontal line is less than 5 degrees, preferably 2 to 4 degrees. The included angle in this embodiment is 3 °. By adopting the design, two sides of the glass material 999 have certain gradient, and when the glass material is in the cleaning process, the cleaning solvent generated by the cleaning and spraying device 400 can rapidly flow to the two sides on the glass material 999 and wash away the glass slag, so that the surface of the glass material 999 is kept clean.

The distance between two adjacent riding wheel rods 210 is 60 mm-200 mm, and the distance between two adjacent riding wheels 211 is 50 mm-300 mm. The distance setting with a certain density can ensure the integrity of the glass material 999 to the maximum extent and prevent the glass material from being damaged under the action of self gravity.

The moving speed of the conveying device 200 in the horizontal direction is 0.5-3 m/min, wherein the moving speed can be adjusted, and is particularly related to the acid liquor concentration and the acid etching thickness in the acid etching process.

Because the acid liquor spraying device 300 and the cleaning spraying device 400 both adopt the spraying rod 310 structure, the main difference lies in that the materials sprayed by the two devices are different, wherein the acid liquor spraying device 300 sprays acid liquor, the cleaning spraying device 400 sprays cleaning solvent such as clear water, the spraying speed of the acid liquor spraying device 300 is slow, for example, 0.15-1.5 m/s, and the spraying speed of the cleaning spraying device 400 is fast, for example, 1-3.5 m/s.

The structure of the spray bar 310 of the acid sprayer 300 will be described below by taking the spray bar 310 as an example. The width of the spray rod 310 is not less than the width of the glass material 999, and generally, the width of the spray rod 310 is 100-500 mm greater than the width of the glass material 999. Therefore, the acid liquid can be fully covered on the surface of the glass material 999 to the maximum extent, so that the glass material 999 can be corroded by acid and thinned.

The spray rod 310 is provided with the plurality of spray heads 311, and the area of liquid drops formed by the spray heads 311 is not smaller than the area of the glass material 999, so that the acid liquid can be fully covered on the surface of the glass material 999 to the greatest extent, and the glass material 999 can be corroded by acid and thinned. For example, 10-20 spray headers 311 are arranged on each spray bar 310, the spray headers 311 are distributed at equal intervals, and the intervals between the spray headers 311 are 100-200 mm. The spray head 311 adopts an atomization spray structure, and ultrafine liquid drops are generated in the spray process and can uniformly drop on the surface of the glass material 999.

Further, on the acid liquor spraying device 300, the number of the spraying rods 310 is 1-15;

in the pretreatment process, the number of the spray rods 310 is 2-3;

during the acid etching process, the number of spray bars 310 is 6-9.

According to different acid etching processes, the distance between two adjacent spray rods 310 is 100-200 mm, wherein the distance between the spray rod 310 above the glass material 999 and the glass material 999 is 80-250 mm; the distance between the spray rod 310 positioned below the glass material 999 and the glass material 999 is 30-90 mm.

It should be noted that, according to actual needs, the acid solution spraying device 300, the cleaning spraying device 400, and the wind power assembly 500 are controlled by system software and are operated automatically, and the spraying speed of the spraying rods 310 or the operating frequency of the spraying rods 310 can be controlled, for example, only the upper spraying rod 310 is turned on to spray the glass material 999 or only the lower spraying rod 310 is turned on to spray the glass material 999, or the upper or lower spraying rod 310 is operated intermittently.

The device of the invention further comprises a shell 110, wherein the shell 110 is arranged above the conveying device 200, the acid liquor spraying device 300, the cleaning spraying device 400 and the wind power assembly 500 are covered in the shell to reduce leakage of acid liquor or acid gas, and micro negative pressure is formed in the shell 110.

In order to realize the recycling of the acid liquor, the device of the invention further comprises an acid liquor recovery unit 700, wherein the acid liquor recovery unit 700 is located below the acid liquor spraying device 300 and is used for recovering the acid liquor and recycling the acid liquor. The acid liquor recovery unit 700 further comprises a solid-liquid separation unit 710 so as to separate solid suspended matters, the solid-liquid separation unit 710 comprises multistage settling tanks 711 which are connected in sequence, the number of the settling tanks 711 is 2-6, acid liquor flows through each tank, and the suspended matters are partially precipitated and are conveyed out of the device by a slag discharge pump. Further, the solid-liquid separation unit 710 is a cyclone separator; the acid liquid with the solid enters a cyclone separator from the side direction, and solid slag is discharged from the bottom and is sent out of the device; the clear liquid is recycled.

In addition, the wind power assembly 500 of the present invention is an air knife, which is a general forming device commercially available, and the air knife works in a principle that compressed air passes through a gap to form a uniform air flow sheet, and the sheet is blown on a working surface, so that the effects of removing liquid, removing dust, drying, cooling, etc. can be achieved.

Example 2

Referring to fig. 6-7, the present invention further provides another glass thinning apparatus 1000, which is different from embodiment 1, further comprising an alkali liquor spraying apparatus 600, wherein the alkali liquor spraying apparatus 600 is located between the acid spraying apparatus 300 and the cleaning spraying apparatus 400. The alkali spraying device 600 comprises a plurality of spray bars 310, and the spray bars 310 can swing back and forth along the advancing direction of the glass material 999, so as to ensure that the alkali liquor or the cleaning solvent is more uniform in the spraying process.

Specifically, the alkali liquor spraying device 600 is located above and/or below the conveying device 200, and sprays alkali liquor on the glass material 999, so that the alkali liquor covers the surface of the glass material 999, and neutralization and alkali washing of the glass material 999 are achieved.

The alkali liquor spraying device 600 and the cleaning spraying device 400 in the invention both adopt the structure of the spraying rod 310, and the main difference lies in that the materials sprayed by the two devices are different, wherein the alkali liquor spraying device 600 sprays alkali liquor, and the cleaning spraying device 400 sprays cleaning solvent, such as clear water. The spraying speed of the alkali liquor spraying device 600 can be selected from 0.15-1.5 m/s, and the spraying speed of the cleaning spraying device 400 can be selected from 1-3.5 m/s.

On the alkali liquor spraying device 600, the number of the spraying rods 310 is 2-3, and the distance between two adjacent spraying rods 310 is 100-200 mm.

It should be noted that, according to actual needs, the acid solution spraying device 300, the alkali solution spraying device 600, the cleaning spraying device 400, and the wind power assembly 500 are controlled by system software and are operated automatically, and the spraying speed of the spraying rods 310 or the working frequency of the spraying rods 310 can be controlled, for example, only the upper spraying rod 310 is turned on to spray the glass material 999 or only the lower spraying rod 310 is turned on to spray the glass material 999, or the upper or lower spraying rod 310 works intermittently.

In order to realize the recycling of the alkali liquor, the device of the invention further comprises an alkali liquor recovery unit 800, and the alkali liquor recovery unit 800 is positioned below the alkali liquor spraying device 600 and is used for recovering the alkali liquor and recycling the alkali liquor.

Example 3

Referring to fig. 8-9, the present invention further provides a continuous, fully automated glass material 999 thinning line including one or more sets of glass thinning apparatuses 1000 of the previous embodiment 1 or embodiment 2.

In order to realize the detection of the product, the device also comprises a product detection section 2000, when the thinned glass material 999 enters the product detection section 2000, the thickness and surface quality detection is carried out, and the qualified product moves to the next procedure or enters a packaging line; the rejected product is removed from the conveyor belt to a reject lane.

The structure of the present invention is described in detail below by specific examples:

referring to fig. 8-9, a continuous full-automatic glass material 999 thinning production line includes at least 3 glass thinning apparatuses 1000 and a detection section 2000 connected in sequence, wherein the 1 st glass thinning apparatus is a pretreatment unit S1, the 2 nd glass thinning apparatus and the 3 rd glass thinning apparatus are glass thinning units S2, and the product detection section is a detection unit S3.

In the pretreatment unit S1, the 1 st glass thinning apparatus 1000 includes an acid solution spray device 300, a cleaning spray device 400, and a wind power module 500, which are connected in this order. Wherein, the number of the spray rods 310 of the acid liquor spray device 300 is 1-5, so as to achieve the purpose of primarily acid etching the surface of the glass material 999.

In the glass thinning unit S2, the 2 nd frame glass thinning apparatus 1000 includes an acid solution spray device 300, a cleaning spray device 400, and a wind power module 500, which are connected in this order. Wherein, the number of the spray rods 310 of the acid liquor spray device 300 is 2-4, so as to achieve the purpose of deeply acid-etching the surface of the glass material 999.

In the glass thinning unit S2, the 3 rd glass thinning apparatus 1000 includes an acid solution spraying apparatus 300, an alkali solution spraying apparatus 600, a cleaning spraying apparatus 400, and a wind power assembly 500, which are connected in sequence. The number of the spray rods 310 of the acid liquor spray device 300 is 4-6 so as to achieve the purpose of deeply acid etching the surface of the glass material 999, and the number of the spray rods 310 of the alkali liquor spray device 600 is 1-5 so as to achieve the purpose of neutralizing and alkali cleaning the surface of the glass material 999.

It is worth noting that a series of cleaning showers 400 are added in front of each acid showers 300 to clean the surface of the glass material 999 in advance. Of course, the additional part is not necessary and may be selected according to actual needs.

The cleaning and spraying device 400 sprays the cleaning solvent on the glass material 999, the cleaning solvent is fully covered on the surface of the glass material 999, the glass material 999 is cleaned, and the wind power assembly 500 cleans and dries the glass material 999 through the compressed gas generated by the wind power assembly 500. The purpose of the cleaning spray assembly 400 and wind assembly 500 process is to facilitate intermediate detection of the thickness of the etched glass material 999.

The quality inspection instruments of the product inspection section 2000 described above are a thickness gauge and a surface flatness gauge.

In the use process of the whole production line, the number of the glass thinning devices 1000 in the glass thinning process can be set according to needs, and due to the fact that the structures of the glass thinning devices are the same, the racks 100 and the conveying devices 200 of the whole production line can be processed in a unified mode and installed in a coordinated mode. The whole production line realizes the safe, environment-friendly, efficient and unmanned operation of the glass material 999 etching process through continuous automatic operation under the control of control software, and completes the etching thinning flow of glass or display panel glass.

Example 4

In the TFT _ LCD manufacturing process, the thickness of the glass substrate is one of the most important factors, and from the viewpoint of the manufacturing process, thinning of the glass substrate is mainly achieved by two ways:

1. directly purchasing 0.5mm or even thinner substrates; but the production line for producing the ultrathin glass has huge investment and low production yield, and the substrate is broken in the links of production, transportation, use and the like; therefore, the cost of ultra-thin glass is high.

2. The thickness of the substrate is reduced by thinning the existing substrate. The method has low requirement on the thickness of the glass substrate, and only thin glass needs to be thinned; thinning is also production equipment and production cost.

Chemical etching of glass: namely, the chemical corrosion action of the hydrofluoric acid solution is utilized to destroy the original silicon-oxygen film on the surface of the glass to generate a new silicon-oxygen film on the surface, so that the glass has high transmittance and a smooth surface. The chemical etching efficiency is higher than that of physical grinding, the energy consumption is low, and the method is also suitable for glass with various thicknesses; however, hydrofluoric acid used in chemical etching is a hazardous chemical, which brings safety and environmental protection problems.

The composition of the panel glass is generally composed of SiO, NaO, K2O, CaO, PbO, B2O3, etc. Upon reaction with HF, SiF4, NaF, KF, CaF2, PbF2, BaF2, HBF4 and the like are produced. The specific reaction process is as follows: na2O +2HF → 2NaF + H2O

CaO+2HF→CaF2+H2O

SiO2+4HF→SiF4+2H2O

K2O+2HF→2KF+H2O

PbO+2HF→PbF2+H2O

B2O3+8HF→2HBF4+3H2O

The SiF is in a gas state under a general condition, but is not volatilized in a hydrofluoric acid solution, namely the SiF reacts with hydrofluoric acid to generate fluosilicic acid: SiF4+ HF → H2SiF6

The fluosilicic acid and the fluoboric acid belong to strong acid and react with a plurality of fluoride salts to generate a plurality of fluosilicate salts and fluoborate salts; these salts are both soluble and insoluble, forming precipitates. The chemical reactions therein are extremely complex; the components after the reaction are also extremely complex.

The possible salts generated by the chemical thinning process and their solubility in water components are detailed in table 3 according to the components of table 2.

As can be seen from table 3, most of the thinning waste slag (commonly referred to as "glass slag" in the industry) generated in the thinning process is aluminum fluoride, fluoroaluminate, fluorosilicate, etc.; the thinning waste acid contains hydrofluoric acid, fluosilicic acid, fluoboric acid, soluble fluosilicate, fluoborate and the like.

Experiments prove that the concentration of hydrofluoric acid in the thinning acid liquid is within the range of 5-55%, the higher the concentration of hydrofluoric acid is, the faster the reaction speed is, and the higher the thinning efficiency is; but the poorer the thinning quality.

Experiments prove that when the concentration of fluosilicic acid in the thinning acid solution is 2-5%, the thinning reaction is promoted, and the thinning rate can be increased; however, when the ratio of the concentration of the fluosilicic acid to the concentration of the hydrofluoric acid is more than 0.8, the fluosilicic acid inhibits the reaction between the hydrofluoric acid and the glass, and thus the thinning rate is decreased and the thinning effect is deteriorated.

Experiments prove that the temperature liquid of the thinning acid liquid influences the thinning rate and effect; too low a temperature leads to too slow a reaction and too high a temperature leads to too violent a reaction, which causes defects in the product and increases the volatilization of the acid solution. The thinning acid solution temperature is preferably controlled to be 35-50 ℃ to maintain a certain thinning rate and ensure the thinning quality.

Experiments prove that under the condition of the same acid liquid concentration and the same acid liquid temperature, the longer the thinning time is, the more obvious the thickness thinning is.

Experiments prove that the solid precipitate has great influence on the surface quality of the glass: if the sediment deposited on the surface of the glass can not be cleaned in time, the thinning uniformity of the surface of the glass can be greatly influenced, and the glass panel is unqualified in serious cases.

A method of thinning a glass panel using the continuous, fully automated glass panel thinning line of example 3, comprising moving a glass or display panel on a horizontally moving conveyor and through the steps of: wherein the moving speed of the conveying device in the horizontal direction is 0.5-3 m/min, in this embodiment, 2m/min is selected.

(1) Pretreatment step

Concentrated sulfuric acid and hydrofluoric acid are used for preparing pretreatment acid liquid, wherein the sulfuric acid content is 65-75%, and the hydrofluoric acid content is 3-8%. Wherein the contents of the sulfuric acid and the hydrofluoric acid are dynamically changed, and the acid liquid can be timely supplemented according to the content change. The pretreatment acid liquor spraying section is provided with an acid supplementing interface, so that consumed acid liquor components can be supplemented in time; the waste acid liquor outlet is arranged to output acid liquor after being sprayed for a plurality of times.

And (4) rinsing the glass or display panel moving pre-spraying section with clear water. Then moving to a pretreatment acid liquor spraying section, spraying the pretreatment acid liquor on the surface of the glass or display panel to be thinned, wherein the spraying is bidirectional spraying from the upper surface to the lower surface, moving the glass or display panel to a clear water spraying section after 5min, and entering a wind power assembly (air knife) water blowing section after the clear water spraying, wherein the washing water is blown back to the clear water spraying section from the surface of the glass or display panel by the wind power assembly; the bottom of the pretreatment spraying section is provided with an acid liquor recovery unit, in particular to a receiving groove, which receives the sprayed acid liquor and recycles the acid liquor.

(2) Thinning process

Preparing a thinning acid solution by using hydrochloric acid and hydrofluoric acid, wherein the content of the hydrochloric acid is 10-25%, and the content of the hydrofluoric acid is 10-30%; the same acid solution can also be supplemented at any time, see step (1).

The glass or the display panel is firstly rinsed by clean water and then moved to a thinning acid liquor spraying section, the thinning acid liquor is sprayed on the surface of the panel glass to be thinned, the upper surface and the lower surface of the panel glass are sprayed in two directions, the panel glass enters the clean water spraying section after 30min, the panel glass enters the wind power assembly water blowing section after being sprayed by clean water, and the wind power assembly blows the washing water from the surface of the glass or the display panel back to the clean water spraying section and continuously blows the glass or the display panel for drying.

Then, thinning the glass or the display panel for the second time, moving to the second part of the thinning acid liquor spraying section, spraying the thinning acid liquor on the surface of the glass of the panel to be thinned, wherein the upper part and the lower part are sprayed in two directions, moving the glass or the display panel to the clean water spraying section after 20min, entering the water blowing section of the wind power assembly after the clean water is sprayed, blowing the washing water from the surface of the glass or the display panel to the clean water spraying section by the wind power assembly, and continuously drying the glass or the display panel;

the glass or the display panel continuously moves to the alkali liquor neutralizing and spraying section, the alkali liquor is sprayed on the surface of the panel glass to be thinned, after 5min, the glass or the display panel moves to the clear water spraying section, after being sprayed with clear water, the clear water enters the water blowing section of the wind power assembly, the wind power assembly blows the washing water back to the clear water spraying section from the surface of the glass or the display panel, and the glass or the display panel is continuously dried.

(3) Detection and finishing procedure

The processed panel enters a detection section, and qualified products enter the next procedure or enter a packaging line after thickness and surface quality detection; the rejected product is moved from the conveyor to a reject lane.

The rinsing with clear water is an option, namely the water is not rinsed, and the water directly enters the pretreatment acid liquor spraying section or the thinning acid liquor spraying section.

The alkali washing step of the alkali liquor neutralization spraying section is optional, some glass has strong acid carrying capacity after being washed with acid, the acid liquor cannot be washed away by water, the acid liquor can be effectively neutralized by adding one section of alkali washing, and then the acid liquor and the alkali liquor are washed away together by water.

And (3) outputting the cleaned waste acid liquor to an acid liquor recovery unit, removing part of silicon dioxide and part of alkali metal salt in the waste acid liquor, regenerating the acid liquor, and returning the acid liquor to the production line.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. 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.

Claims

1. A glass thinning apparatus, comprising:

a machine frame, a plurality of guide rails and a plurality of guide rails,

2. The glass thinning apparatus according to claim 1, further comprising a housing disposed above the conveying device and housing the acid solution spraying device, the cleaning spraying device and the wind power assembly therein to reduce leakage of the acid solution or the acid gas, wherein a slight negative pressure is formed in the housing.

3. A glass thinning apparatus according to claim 1,

the washing and cleaning device is characterized by also comprising an alkali liquor spraying device, wherein the alkali liquor spraying device is positioned between the pickling spraying device and the cleaning spraying device; the alkali liquor spraying device comprises a plurality of spraying rods, and the spraying rods can swing back and forth along the advancing direction of the glass material so as to ensure that the alkali liquor is more uniform in the spraying process;

on the alkali liquor spraying device, the number of the spraying rods is 2-3, and the distance between every two adjacent spraying rods is 100-200 mm;

the acid liquor recycling device is characterized by also comprising an acid liquor recycling unit, wherein the acid liquor recycling unit is positioned below the acid liquor spraying device and used for recycling acid liquor;

the acid liquor recovery unit also comprises a solid-liquid separation unit so as to separate solid suspended matters, the solid-liquid separation unit comprises multistage settling tanks which are connected in sequence, and the number of the settling tanks is 2-6.

4. A glass thinning apparatus according to claim 1 or 3, wherein a plurality of showerheads are provided on the shower rod, and the area of the liquid drops formed by the showerheads is not smaller than the area of the glass material.

5. The glass thinning apparatus according to claim 4, wherein 10-20 spray headers are arranged on each spray rod, the spray headers are distributed at equal intervals, and the interval between the spray headers is 100-200 mm.

6. A glass thinning apparatus according to claim 1, wherein the number of said spray bars on said acid liquid spraying means is 1 to 15;

in the pretreatment process, the number of the spray rods is 2-3 spray rods;

in the acid etching process, the number of the spray rods is 6-9 spray rods.

7. The glass thinning apparatus according to claim 6, wherein a distance between two adjacent spray bars is 100 to 200 mm;

the distance between the spray rod positioned above the glass panel and the glass panel is 80-250 mm; the distance between the spray rod and the glass panel is 30-90 mm and is located below the glass panel.

8. The glass thinning apparatus according to claim 1, wherein the conveying device includes a plurality of idler rods horizontally arranged and driven by a power mechanism, a plurality of idlers are distributed on each idler rod and equidistantly distributed for supporting the glass material, from left to right, the idlers and the contact points of the glass material form an arc-shaped curve, the high point of the curve is located in the middle of the idler rod, and the low point of the curve is located on both sides of the idler rod.

9. A glass thinning apparatus according to claim 8, wherein a line connecting the high point and the low point of said curve makes an angle of less than 5 ° with a horizontal line.

10. The glass thinning apparatus according to claim 8, wherein a moving speed of the conveying device in a horizontal direction is 0.5 to 3 m/min.

11. A continuous full-automatic glass panel thinning production line is characterized by comprising the glass thinning device according to any one of claims 1 to 10, wherein the glass thinning device comprises a plurality of acid liquor spraying devices, cleaning spraying devices and wind power assemblies which are arranged at intervals;

or,

12. A method of glass panel thinning using the continuous fully automated glass panel thinning line of claim 11, comprising moving a glass or display panel on the horizontally moving conveyor and through the steps of:

(1) pretreatment step

(2) thinning process