UTG edge chamfering method

Abstract

The application discloses a UTG edge chamfer processing method, comprising the following steps: S1, point touch etching is performed on one side edge of the ultra-thin glass, the ultra-thin glass is placed into a drying box, and preliminary etching is performed; S2, preliminary etching is performed on the other three edges of the ultra-thin glass; S3, one edge of the ultra-thin glass is placed in a grinding groove of a grinding platform to be ground back and forth, and the grinding platform stores etching liquid; S4, the other three edges of the ultra-thin glass are ground; S5, the ultra-thin glass is placed in a slit in a flushing groove, and the ultra-thin glass is flushed by etching liquid from bottom to top in the slit; S6, after the same time interval, the jig is rotated by 90 degrees and placed in the slit, and the other three edges of the ultra-thin glass are preliminarily flushed; and S7, cleaning is performed, and the ultra-thin glass with the edge chamfer is obtained. The application has the advantages that the edge of the ultra-thin glass has the chamfer, the glass is smoother, and the bending capacity of the glass is improved.

Description

Technical Field

[0001] This invention relates to the field of ultrathin glass preparation technology, and in particular to a UTG edge chamfering processing method. Background Technology

[0002] Currently, the mainstream application of flexible screens is in foldable phones, and UTG (ultra-thin glass) is mainly used as a cover for flexible screens. However, with the development of the industry, UTG will inevitably have more application scenarios, and the deep customization of UTG with different shapes, sizes, and thicknesses will also become a demand.

[0003] The processing of ultra-thin flexible glass is technically challenging and involves complex procedures. The glass is prone to breakage during production, and issues such as substandard product flatness and edge damage result in low product yield.

[0004] Currently, the basic thickness of mainstream ultra-thin glass is 30-100μm. Due to the brittleness and thinness of the glass, the edges after cutting are right angles. During processing, bumps and knocks can easily cause numerous microcracks to appear at the edges. These microcracks can easily lead to breakage when the glass is bent, affecting the lifespan of the UTG (Ultra-Thin Glass). Foldable glass needs to meet strong bending performance requirements to ensure stability and bending resistance during use. To remove residual microcracks and sharp edges after UTG cutting, the glass edges need to be treated to remove tiny microcracks and make the edges smoother and rounder, effectively improving the edge strength of the UTG.

[0005] UTG's existing edge chamfering process requires ultra-thin glass to undergo processes such as coating and stacking, applying acid-resistant adhesive, edge etching, adhesive removal, and subsequent processing. The mainstream approach involves coating both sides of the glass with ink or adhesive, leaving the edges uncoated, and then using acid etching to smooth and round the edges, creating a chamfer. These processes also require continuous cleaning, inspection, and alignment, making the process delicate and complex. This complexity can easily lead to breakage of the ultra-thin flexible glass and poor surface flatness, resulting in a cumbersome manufacturing process and low yield for ultra-thin flexible glass covers.

[0006] Some processes use physical grinding methods, but these can easily cause cracks at the glass edges, resulting in structural damage and a low yield rate. Summary of the Invention

[0007] The purpose of this invention is to provide a UTG edge chamfering processing method, which can chamfer the edges of ultra-thin glass, making the glass smoother and improving its bending ability.

[0008] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A method for processing UTG edge chamfering, characterized by comprising the following steps: S1, the cut ultra-thin glass is clamped with a clamping tool, and one edge of the ultra-thin glass is etched by point etching. The side of the ultra-thin glass that has absorbed the fine line-shaped water film etching solution is placed into the drying oven for preliminary etching. S2, repeat step S1 to perform preliminary etching on the other three sides of the ultrathin glass; S3, Take the ultra-thin glass with all four sides initially etched and place it in the grinding groove of the grinding platform for grinding back and forth. The grinding platform stores etching solution. S4. Repeat step S3 to grind the other three sides of the ultrathin glass. S5, after the ultra-thin glass is ground, it is fixed on both sides by a fixture and placed in the slit opened in the flushing tank. The ultra-thin glass is flushed by the etching solution from bottom to top in the slit. S6. After the same amount of time, rotate the fixture 90° and place it in the slit. Repeat step S5 to rinse the other three sides of the ultrathin glass. S7. Clean the ultra-thin glass obtained in step S6 to obtain ultra-thin glass with chamfered edges.

[0009] Preferably, the etching solution is selected from one or more of sulfuric acid, hydrofluoric acid, phosphoric acid, hydrochloric acid, and acetic acid.

[0010] Preferably, in step S1, the point-touch etching is specifically achieved by setting multiple conical water outlets below one edge of the ultra-thin glass, with the upper small opening of the conical water outlet serving as the water outlet end, and the bottom of the conical water outlet being introduced with etching solution via a water pump.

[0011] Preferably, in step S3, the grinding platform includes an outer rigid frame and an inner soft layer, and grinding grooves are formed on both the rigid frame and the soft layer.

[0012] Preferably, the rigid frame is an acid-resistant material with an internal multi-microporous structure, selected from resin, rigid plastic or composite material, and the material of the soft layer is selected from sponge, fiber, fabric, soft plastic or composite material. The etching solution is stored in both the rigid frame and the soft layer by a water pump.

[0013] Preferably, in step S5, multiple sets of slits are opened above the flushing trough, and the lower part of the multiple sets of slits is connected to the inside of the flushing trough. The flushing trough is set in a liquid collection tank, and a water pump is installed in the liquid collection tank and connected to the bottom of the flushing trough.

[0014] Preferably, in step S5, the fixture is assembled from two parts, upper and lower, and has slots on all four sides.

[0015] Preferably, the ultrathin glass is fixedly installed inside the fixture by means of a wire winding support.

[0016] In summary, the beneficial effects of this invention are as follows: The single-piece glass processing method saves at least several steps, including coating, stacking, and adhesive separation, thereby simplifying the processing flow of ultra-thin flexible glass covers and improving processing efficiency and yield. The glass edges are treated with an etching solution using a point-touch method, followed by grinding using a physicochemical mixture to eliminate micro-cracks and create chamfered edges. The upward flow of the processing solution balances the scouring force and gravity, stabilizing the glass and preventing deformation. The scouring water flow also makes the glass surface smoother and repairs surface defects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the conical water outlet structure of the present invention; Figure 2 This is a schematic diagram of the grinding platform structure of the present invention; Figure 3 This is a schematic diagram of the flushing groove installation structure of the present invention; Figure 4 This is a schematic diagram of the ultrathin glass with chamfered edges prepared according to the present invention. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. These embodiments do not constitute a limitation on the present invention.

[0019] like Figure 1 The UTG edge chamfering method shown includes the following steps: S1, the cut ultra-thin glass is clamped by a clamping tool, and one edge of the ultra-thin glass is subjected to point-etching. Multiple conical water outlets 1 are set below one edge of the ultra-thin glass, such as... Figure 2 The small opening at the top of the conical water outlet 1 is the water outlet end. The bottom of the conical water outlet 1 is introduced with etching solution through a water pump. When the edge of the ultrathin glass is held vertically, it is gently touched to the water droplets discharged from the top of the conical water outlet 1. The water droplets will be adsorbed on the bottom of the ultrathin glass due to surface tension and will form a thin line-like water film at the edge. The side of the ultrathin glass with the thin line-like water film of etching solution is placed in a drying oven to accelerate the evaporation of the etching solution. Due to the deposition effect of gravity, the upper edge of the ultrathin glass will evaporate first and the lower edge will evaporate later. At this time, there will be an etching time difference. The lower etching time is longer, and more ultrathin glass is etched, which will form a preliminary chamfer and perform preliminary etching.

[0020] S2, repeat step S1 to perform preliminary etching on the other three sides of the ultrathin glass.

[0021] S3. Place the pre-etched ultra-thin glass on all four sides into the grinding groove of the grinding platform and grind it back and forth. The grinding speed should be slowed down and the force controlled to prevent the ultra-thin glass from breaking. Figure 3 The grinding platform shown includes an outer rigid frame 2 and an inner soft layer 3. Grinding grooves are formed on both the rigid frame 2 and the soft layer 3. The rigid frame 2 is made of an acid-resistant material with an internal multi-microporous structure, selected from resin, rigid plastic or composite material. The material of the soft layer 3 is selected from sponge, fiber, fabric, soft plastic or composite material. The material of the soft layer 3 should be relatively soft and not easily break the ultra-thin glass. Etching solution is stored in both the rigid frame 2 and the soft layer 3 through water pumps. The ultra-thin glass moves in the grinding grooves for grinding. Under the combined action of grinding and etching solution corrosion, edge treatment is achieved by the combined action of physical and chemical methods.

[0022] S4. Repeat step S3 to grind the other three sides of the ultrathin glass.

[0023] S5. After the ultra-thin glass is ground, it is fixed on both sides by the fixture 4 and placed in the slit 6 opened in the flushing tank 5. The ultra-thin glass is flushed by the etching liquid flowing from bottom to top in the slit 6. After the same time interval, the fixture 4 is rotated 90° and placed in the slit 6. The etching liquid with a stable flow rate flows from bottom to top in the slit 6, continuously flushing and thinning the edges of the ultra-thin glass, making the edges of the ultra-thin glass more rounded and smooth.

[0024] S6. After the same amount of time, rotate the fixture 4 90° and place it in the slit 6. Repeat step S5 to rinse the other three sides of the ultrathin glass.

[0025] S7. Clean the ultra-thin glass obtained in step S6 to obtain ultra-thin glass with chamfered edges.

[0026] All of the above etching solutions are selected from one or more of sulfuric acid, hydrofluoric acid, phosphoric acid, hydrochloric acid, and acetic acid.

[0027] Furthermore, such as Figure 4 As shown, multiple sets of slits 6 are opened above the flushing tank 5, and the lower part of the multiple sets of slits 6 is connected to the interior of the flushing tank 5. The flushing tank 5 is set in the liquid collection tank 7, and a water pump is installed in the liquid collection tank 7 and connected to the bottom of the flushing tank 5.

[0028] In step S5, fixture 4 is square and assembled from two parts, with slots on all four sides. The ultra-thin glass is fixedly installed inside fixture 4 by wire winding support. The etching solution flows from bottom to top, overflows from the slit 6 after passing through the ultra-thin glass, is collected by the outer collection tank 7, and is then pumped back to the slit 6, thus completing one cycle. A uniform and stable fluid is formed in the slit 6. The upward flow of the fluid allows the scouring force and the weight of the ultra-thin glass to cancel each other out, reducing deformation of the ultra-thin glass.

[0029] This invention employs a single-piece glass processing method, which can save at least several steps such as coating, stacking, and adhesive separation, thereby simplifying the processing flow of ultra-thin flexible glass covers and improving processing efficiency and yield. An etching solution is used to treat the glass edges using a point-touch method, followed by grinding using a physicochemical mixture to eliminate micro-cracks and create chamfered edges. The upward flow of the processing solution balances the scouring force and gravity, stabilizing the glass, preventing deformation, and smoothing the glass surface, thus repairing surface defects.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within the scope of its essence and protection. Such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A method for processing UTG edge chamfering, characterized in that, The steps include the following: S1, the cut ultra-thin glass is clamped with a clamping tool, and one edge of the ultra-thin glass is etched by point etching. The side of the ultra-thin glass that has absorbed the fine line-shaped water film etching solution is placed into the drying oven for preliminary etching. S2, repeat step S1 to perform preliminary etching on the other three edges of the ultrathin glass; S3, Take the ultra-thin glass with all four sides initially etched and place it in the grinding groove of the grinding platform for grinding back and forth. The grinding platform stores etching solution. S4. Repeat step S3 to grind the other three sides of the ultrathin glass. S5, after the ultra-thin glass is ground, it is fixed on both sides by a fixture and placed in the slit opened in the flushing tank. The ultra-thin glass is flushed by the etching solution from bottom to top in the slit. S6. After the same amount of time, rotate the fixture 90° and place it in the slit. Repeat step S5 to rinse the other three sides of the ultrathin glass. S7. Clean the ultra-thin glass obtained in step S6 to obtain ultra-thin glass with chamfered edges.

2. The UTG edge chamfering method according to claim 1, characterized in that: The etching solution is selected from one or more of sulfuric acid, hydrofluoric acid, phosphoric acid, hydrochloric acid, and acetic acid.

3. The UTG edge chamfering method according to claim 1, characterized in that: In step S1, the point-touch etching is specifically achieved by setting multiple conical water outlets below one edge of the ultra-thin glass. The small opening at the top of the conical water outlet is the water outlet end, and the bottom of the conical water outlet is introduced with etching solution through a water pump.

4. The UTG edge chamfering method according to claim 1, characterized in that: In step S3, the grinding platform includes an outer rigid frame and an inner soft layer, and grinding grooves are formed on both the rigid frame and the soft layer.

5. The UTG edge chamfering method according to claim 4, characterized in that: The rigid frame is an acid-resistant material with an internal multi-microporous structure, and is selected from resin, rigid plastic or composite material. The material of the soft layer is selected from sponge, fiber, fabric, soft plastic or composite material. The etching solution is stored in both the rigid frame and the soft layer by a water pump.

6. The UTG edge chamfering method according to claim 1, characterized in that: In step S5, multiple sets of slits are opened above the flushing trough, and the lower part of the multiple sets of slits is connected to the inside of the flushing trough. The flushing trough is set in the liquid collection tank, and the liquid collection tank is connected to the bottom of the flushing trough through a water pump.

7. The UTG edge chamfering method according to claim 1, characterized in that: In step S5, the fixture is assembled from two parts, upper and lower, and slots are provided on all four sides.

8. A UTG edge chamfering method according to claim 7, characterized in that: The ultra-thin glass is supported and fixed inside the fixture after being wound with wire.

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