Method for improving glass laser cutting efficiency

Abstract

The invention relates to the technical field of glass manufacturing, and particularly discloses a method for improving glass laser cutting efficiency, which comprises the following steps: before glass laser cutting, plating at least one layer of anti-reflection protective film on the cutting surface of glass so as to reduce the reflectivity of laser on the cutting surface, and then cutting; the protective film is a soluble film and can be washed off after laser cutting, and the refractive index of the protective film is between the refractive index of air and the refractive index of glass. According to the method for improving the laser cutting efficiency of the glass, provided by the invention, the cutting surface of the glass is plated with the special protective film before laser cutting, and the special protective film has an anti-reflection effect, so that the reflection of laser on the surface of the glass can be reduced, and the laser cutting efficiency is improved. Meanwhile, the protective film is a soluble film and can be conveniently removed during subsequent processing after laser cutting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass manufacturing, in particular to a method for improving the laser cutting efficiency of glass. BACKGROUND

[0002] At present, the flat glass shaped and flowed out of the port of the kiln on the glass production line is generally processed and cut by mechanical cutting, which is a traditional mechanical processing method. The method uses super-hard diamond cutters to draw marks on the surface of the glass, and then breaks the glass along the marks by applying mechanical stress to complete the cutting. However, the traditional mechanical cutting method requires higher experience of the operator, for example, the depth of the mark cutting, the pressure and the force applied during the breaking need to be controlled by experience, and in the process of mechanical cutting, micro cracks and edge collapse will inevitably occur on the cutting edge of the glass, which will significantly reduce the edge strength of the glass. Therefore, in order to avoid the disadvantages of mechanical cutting, laser cutting is gradually used to replace mechanical cutting. However, due to the high reflectivity of the glass surface, the reflectivity of the laser during laser cutting is high, which leads to the problem of low laser cutting efficiency. SUMMARY

[0003] The purpose of the present application is to provide a method for improving the laser cutting efficiency of glass, which aims to solve the problem of low laser cutting efficiency caused by the high reflectivity of the glass surface.

[0004] To achieve the above-mentioned purpose, the present application is realized by the following technical scheme: The present application provides a method for improving the laser cutting efficiency of glass, which comprises the following steps: before laser cutting of the glass, at least one anti-reflection protective film is coated on the cutting surface of the glass to reduce the reflectivity of the laser on the cutting surface, and then laser cutting is performed. The protective film is a soluble film that can be washed off after laser cutting, and the refractive index of the protective film is between the refractive index of air and the refractive index of glass.

[0005] Specifically, the method for improving the laser cutting efficiency of glass provided by the present application benefits from the special protective film coated on the cutting surface (surface) of the glass before laser cutting. The special protective film has an anti-reflection effect, which can reduce the reflection of the laser on the glass surface, thereby improving the efficiency of laser cutting. At the same time, the protective film is a soluble film, which can be easily removed during subsequent processing after laser cutting.

[0006] Further, a method for improving the efficiency of laser cutting of glass: the method can be integrated into the production line of glass, and the glass is formed and annealed in the furnace, and then enters the film coating process, at least one protective film is coated on the cutting surface of the glass at a first temperature, and after the film layer is solidified, it enters the laser cutting process for laser cutting.

[0007] Further, a method for improving the efficiency of laser cutting of glass: the method can be integrated into the production line of glass, and the glass is formed and annealed in the furnace, and then enters the film coating process, at least one protective film is coated on the cutting surface of the glass at a first temperature, and after the film layer is solidified, it enters the laser cutting process for laser cutting.

[0008] Further, a method for improving the efficiency of laser cutting of glass: the glass is coated with a protective film on the cutting surface at 100-250 DEG C (i.e. the first temperature is 100-250 DEG C).

[0009] Further, a method for improving the efficiency of laser cutting of glass: the glass is coated with a protective film on the cutting surface at 100-250 DEG C (i.e. the first temperature is 100-250 DEG C).

[0010] Further, a method for improving the efficiency of laser cutting of glass: the protective film is formed by solidifying a coating liquid coated on the cutting surface of the glass, and the coating liquid at least includes deionized water, polyethylene glycol, soluble starch and boric acid, and includes or does not include silica resin and / or nano zirconium oxide resin. Wherein, the silica resin and nano zirconium oxide resin are used to control the refractive index of the formed protective film, the silica resin is used to reduce the refractive index, and the nano zirconium oxide resin is used to increase the refractive index.

[0011] Further, a method for improving the efficiency of laser cutting of glass: the mass ratio of deionized water, polyethylene glycol, soluble starch and boric acid in the coating liquid is 900-1100: 9.5-10: 0.3-0.4: 0.05-0.1.

[0012] Further, a method for improving the efficiency of laser cutting of glass: the preparation method of the coating liquid is: heating the deionized water to 85-95 DEG C, then adding the polyethylene glycol and stirring for 10-30 minutes, then adding the soluble starch and stirring for 1-10 minutes, then adding the boric acid and stirring for 1-10 minutes, and finally adding or not adding the silica resin and / or nano zirconium oxide resin for refractive index adjustment, so that the refractive index of the protective film formed by solidifying the coating liquid is between the refractive index of air and the refractive index of glass.

[0013] The beneficial effects of the present application are: The method for improving the laser cutting efficiency of glass provided by the present application can be integrated into an existing glass production line, and the penetration of laser is increased and the reflection of laser is reduced by coating at least one low-refractive protective film layer on the cutting surface of the flat glass after the flat glass is formed and discharged from the kiln on the production line, so as to improve the efficiency of laser cutting. At the same time, the glass can also be protected due to the presence of the protective film on the surface of the glass, which can replace the mildew-proof powder, and the glass can be directly grabbed by the mechanical hand and placed on the glass rack after the cutting is completed, so as to avoid the problem of scratches on the glass, save the use of mildew-proof powder, and reduce the cost of glass manufacturing.

[0014] In summary, the method for improving the laser cutting efficiency of glass provided by the present application is characterized in that a protective film layer is coated on the surface of the glass before laser cutting, which on the one hand facilitates the increase of the penetration of laser, the reduction of the reflection of laser, the improvement of the utilization rate of laser, and the improvement of the efficiency of laser cutting; and on the other hand, the protective film can also provide additional protection for the glass, and can act as a role of mildew-proof powder during the process of grabbing and transferring the glass by the mechanical hand, so as to replace the mildew-proof powder, reduce the cost of mildew-proof powder, protect the glass, reduce the scratches on the surface of the glass, reduce the water vapor erosion of the glass, and increase the service life of the glass. In addition, due to the soluble protective film in the present application, the protective film can be removed (removed by water washing or alcohol washing) according to the needs after laser cutting, so as to facilitate the subsequent processing and application of the glass after cutting. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Figure 1 The schematic diagram of coating a protective film on the cutting surface of the glass in embodiment 1 of the present application.

[0017] The marks in the figure are as follows: 1-glass, 2-protective film. DETAILED DESCRIPTION

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] Example 1

[0020] like Figure 1 As shown, this embodiment 1 provides a method to improve the efficiency of glass laser cutting. The method is as follows: before performing glass laser cutting, at least one layer of anti-reflective protective film 2 is first deposited on the cutting surface of the glass 1 to reduce the reflectivity of the laser on the cutting surface, and then laser cutting is performed to improve the efficiency of laser cutting. The protective film 2 is a soluble film that can be washed away after laser cutting, and the refractive index of the protective film 2 is between that of air and glass.

[0021] Specifically, the method described in Example 1 above can be directly integrated into existing glass production lines. After the glass leaves the kiln and is formed and annealed, it enters the coating process. After the glass 1 is cooled to a first temperature (100-250°C), a prepared coating liquid is applied to the cut surface of the glass 1 using a roller coating equipment or a spray coating equipment to form at least one protective film 2. After the film is cured, it enters the AOI inspection process to inspect the quality of the protective film. If the inspection is satisfactory, it enters the laser cutting process for laser cutting. After the laser cutting is completed, the film is unloaded by a robotic arm.

[0022] The coating solution mentioned above includes at least deionized water, polyethylene glycol, soluble starch, and boric acid, and may or may not include silica resin and / or nano-zirconia resin. The silica resin and nano-zirconia resin are used to regulate the refractive index of the formed protective film. The silica resin is used to reduce the refractive index, and the nano-zirconia resin is used to increase the refractive index.

[0023] Specifically, the preparation process of the above-mentioned coating solution is as follows: 10000.0g of deionized water is heated to 90°C, then 96.4g of polyethylene glycol is added and stirred for 30 minutes, then 3.7g of soluble starch is added and stirred for 10 minutes, then 0.8g of boric acid is added and stirred for 5 minutes, then 0.5g of silica resin is added, and the refractive index of the protective film 2 formed by the curing of the coating solution is adjusted to be approximately 1.40.

[0024] The aforementioned protective film 2 can reduce laser reflectivity by approximately 1.0% during actual laser cutting, thereby improving laser utilization and effectively increasing laser cutting efficiency by approximately 1.0%. Furthermore, thanks to the optimized formulation of the coating solution in this invention, the formed protective film 2 is readily soluble in aqueous solutions, allowing for thorough cleaning during subsequent glass cutting, edge grinding, and cleaning processes.

[0025] Comparative Example 1

[0026] The difference between Comparative Example 1 and Example 1 is that the glass on the production line of Comparative Example 1 is directly put into the laser cutting process after being formed and annealed in the kiln, without the application of protective film 2. The other conditions are the same as those in Example 1.

[0027] Comparison of laser cutting efficiency between Example 1 and Comparative Example 1: Since Example 1 pre-applied a protective film 2 before laser cutting the glass compared to Comparative Example 1, it reduced laser reflection by approximately 1.0% during laser cutting. This improved laser utilization and resulted in a laser cutting efficiency increase of approximately 1.0% compared to Comparative Example 1. Furthermore, the protective film 2 in Example 1 also provides protection for the glass, eliminating the need to spray anti-mildew powder to protect the glass surface from scratches during the robotic unloading process after cutting. This effectively saves on the use of anti-mildew powder and reduces costs.

[0028] The method for improving the efficiency of glass laser cutting provided by this invention benefits from the special protective film 2 that is pre-coated on the cutting surface (surface) of the glass 1 before laser cutting. This special protective film 2 has an anti-reflection effect, which can reduce the reflection of laser on the glass surface, improve the utilization rate of laser, and thus improve the efficiency of laser cutting.

[0029] The above-described preferred embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of the invention. Any obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A method for improving the efficiency of glass laser cutting, characterized in that, The method is as follows: before performing glass laser cutting, at least one layer of anti-reflective protective film is first deposited on the cutting surface of the glass to reduce the reflectivity of the laser on the cutting surface, and then the cutting is performed. The protective film is a soluble film that can be washed away after laser cutting, and its refractive index is between that of air and glass.

2. The method for improving glass laser cutting efficiency according to claim 1, characterized in that, This method can be integrated into a glass production line. After the glass leaves the kiln and is formed and annealed, it enters the coating process. At least one protective film is coated on the cut surface of the glass at the first temperature. After the film is cured, it enters the laser cutting process for laser cutting.

3. The method for improving glass laser cutting efficiency according to claim 2, characterized in that, After the film is cured, a film quality test is performed before it enters the laser cutting process.

4. A method for improving the efficiency of glass laser cutting according to claim 1 or 2, characterized in that, A protective film is applied to the cut surface of the glass at 100–250°C.

5. A method for improving the efficiency of glass laser cutting according to claim 4, characterized in that, A protective film is applied to the cut surface of the glass using roller coating or spray coating methods.

6. The method for improving glass laser cutting efficiency according to claim 1, characterized in that, The protective film is formed by curing a coating liquid applied to the glass cut surface. The coating liquid includes at least deionized water, polyethylene glycol, soluble starch and boric acid, and may or may not include silica resin and / or nano-zirconia resin. The silica resin and nano-zirconia resin are used to control the refractive index of the formed protective film. The silica resin is used to reduce the refractive index, and the nano-zirconia resin is used to increase the refractive index.

7. A method for improving the efficiency of glass laser cutting according to claim 6, characterized in that, The mass ratio of deionized water, polyethylene glycol, soluble starch, and boric acid in the coating solution is 900–1100: 9.5–10: 0.3–0.4: 0.05–0.

1.

8. A method for improving the efficiency of glass laser cutting according to claim 6 or 7, characterized in that, The preparation method of the coating liquid is as follows: deionized water is heated to 85-95°C, then polyethylene glycol is added and stirred for 10-30 minutes, then soluble starch is added and stirred for 1-10 minutes, then boric acid is added and stirred for 1-10 minutes, and finally silica resin and / or nano-zirconia resin are added or not added to adjust the refractive index so that the refractive index of the protective film formed by the curing of the coating liquid is between the refractive index of air and glass.

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