Method for bonding single-hole organic glass and inorganic glass to reduce stress on the edge of the opening

Abstract

The application discloses a kind of single-hole organic glass and inorganic glass bonding method for reducing the stress of opening edge, multiple inorganic glass substrates are stacked to form inorganic glass assembly, after stacking, the excess part of bonding layer is removed, and the inorganic glass opening is exposed, the inorganic glass assembly, the fourth film adhesive layer, the organic glass substrate and the press plate glass are stacked together in sequence to form a first stack, the auxiliary plug round tool is cut and ground, the wrapped silicone strip is wound outside the auxiliary plug round tool and fixed, then the auxiliary plug round tool with the wrapped silicone strip is placed in the organic glass opening of the organic glass substrate and the opening of the cover plate glass, the circular breathable felt is cut and filled into the inorganic glass opening of the inorganic glass assembly, two pieces of polyurethane film completely wrap the first stack and form a second stack by vacuumizing, and the second stack is heat treated to eliminate the stress of opening edge. The application solves the problem of existing technology organic glass opening edge cracking.

Description

Technical Field

[0001] This invention relates to a method for bonding plexiglass and inorganic glass, and more particularly to a method for bonding single-hole plexiglass and inorganic glass to reduce stress at the opening edges, belonging to the field of glass bonding. Background Technology

[0002] In modern society, glass is no longer just used for decoration and privacy; it has been given many more functions, leading to the development of laminated glass. Laminated glass consists of two or more sheets of glass firmly bonded together with a transparent, elastic interlayer. This technology is currently mature in the market. However, due to evolving needs, the original laminated glass technology for communication windows (such as in hospitals and banks) and operational windows (such as robotic arms) can no longer meet market expectations. Glass thickness can negatively impact visual and acoustic performance. Therefore, laminated glass made from plexiglass (such as acrylic and polycarbonate) and inorganic glass has emerged. However, laminated glass made from two different materials already has excessive internal stress. Adding a hole further exacerbates this stress, causing cracks to appear at the edges of the plexiglass after a period of use. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a bonding method for single-hole plexiglass and inorganic glass that reduces the stress at the opening edge, thereby solving the problem of cracking at the opening edge of plexiglass in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A method for bonding single-hole acrylic glass and inorganic glass to reduce edge stress of the opening, characterized by comprising the following steps:

[0006] S1, the inorganic glass opening diameter of the inorganic glass component is S1, the organic glass opening diameter of the organic glass substrate and the opening diameter of the cover glass are S2, where S1>S2 and S1-S2=2~3mm;

[0007] S2. Multiple inorganic glass substrates are stacked to form an inorganic glass assembly. An adhesive layer is provided between two adjacent inorganic glass substrates. After stacking, the excess part of the adhesive layer is deducted and the inorganic glass opening is exposed.

[0008] S3. A fourth adhesive layer opening with a diameter of S2 is made on the fourth adhesive layer through the pressure plate glass;

[0009] S4. The inorganic glass assembly, the fourth film bonding layer, the organic glass substrate and the pressure glass are stacked together in sequence to form a first laminate, and the edges of the first laminate are fixed.

[0010] S5. Select a silicone strip with a rectangular cross-section and wrap it with a release cloth;

[0011] S6. Cut and grind the auxiliary blocking circular tool. The diameter of the auxiliary blocking circular tool is S4=S2-d, where d is the thickness of the wrapped silicone strip. Wrap the wrapped silicone strip around the outside of the auxiliary blocking circular tool and fix it. Then, place the auxiliary blocking circular tool with the silicone strip wrapped in it into the organic glass opening of the organic glass substrate and the opening of the cover glass. Cut a circular breathable felt with a diameter S6=S1. Fill the inorganic glass opening of the inorganic glass assembly with the circular breathable felt.

[0012] S7. Completely wrap the first laminate with two polyurethane films, make contact and seal the two polyurethane films around the edges, and then evacuate the inside of the two polyurethane films to form the second laminate.

[0013] S8. Heat-treat the second laminate to eliminate stress at the opening edges.

[0014] Furthermore, the inorganic glass assembly comprises a first inorganic glass substrate, a first film bonding layer, a second inorganic glass substrate, a second film bonding layer, a third inorganic glass substrate, a third film bonding layer, and a fourth inorganic glass substrate, which are sequentially stacked.

[0015] Furthermore, in step S5, the length of the silicone strip is S3 = πS2 + δ, where δ = 0 to 2 mm.

[0016] Furthermore, in step S6, after the auxiliary blocking round tool is placed into the plexiglass opening of the plexiglass substrate and the opening of the cover glass, the surface of the auxiliary blocking round tool is flush with the upper surface of the cover glass.

[0017] Furthermore, in step S6, after the circular breathable felt fills the inorganic glass opening of the inorganic glass assembly, the bottom surface of the circular breathable felt is flush with the bottom surface of the inorganic glass assembly.

[0018] Furthermore, in step S7, vacuum extraction is performed in an environment with a temperature of 15–30°C and a humidity of ≤55%, the vacuum pressure is controlled at 0.08–0.1 MPa, and the vacuum extraction time is 4–6 hours.

[0019] Further, S8 specifically involves sending the second laminate into a high-pressure autoclave for heat treatment. In the first stage, the autoclave is heated to 50°C and simultaneously pressurized to 0.2 MPa, and maintained for 60 minutes. In the second stage, the temperature is raised to 80°C and the pressure is increased to 0.6 MPa, and maintained for 60 minutes. In the third stage, the temperature is further raised to 100°C and the pressure is increased to 1.2 MPa, and maintained for 120 minutes. In the fourth stage, the temperature is lowered to 32°C and maintained for 50 minutes. The autoclave door is opened when the pressure drops to 0.

[0020] Furthermore, the heating frequency of the pressurized vessel is 1.3℃ / min, and the cooling frequency is 0.7℃ / min.

[0021] Furthermore, the plexiglass substrate is made of acrylic or polycarbonate plexiglass.

[0022] Furthermore, the first film bonding layer, the second film bonding layer, the third film bonding layer, and the fourth film bonding layer are made of PVB, EVA, or TPU.

[0023] Compared with the prior art, the present invention has the following advantages and effects: The present invention provides a bonding method for single-hole organic glass and inorganic glass that reduces the stress at the opening edge, and solves the problem of cracking at the opening edge of inorganic glass in the prior art. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the bonding method between single-hole organic glass and inorganic glass to reduce edge stress of the opening according to the present invention. Detailed Implementation

[0025] To illustrate in detail the technical solutions adopted by the present invention to achieve the intended technical objectives, the technical solutions in 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, not all embodiments. Furthermore, the technical means or technical features in the embodiments of the present invention can be replaced without creative effort. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, the present invention provides a method for bonding single-hole acrylic glass and inorganic glass to reduce edge stress of the opening, comprising the following steps:

[0027] S1, the inorganic glass opening diameter of the inorganic glass component is S1, the organic glass opening diameter of the organic glass substrate and the opening diameter of the cover glass are S2, where S1>S2 and S1-S2=2~3mm.

[0028] S2. Multiple inorganic glass substrates are stacked to form an inorganic glass assembly. An adhesive layer is provided between two adjacent inorganic glass substrates. After stacking, the excess part of the adhesive layer is removed, and the inorganic glass openings are exposed. The inorganic glass assembly includes a first inorganic glass substrate 1, a first film adhesive layer 2, a second inorganic glass substrate 3, a second film adhesive layer 4, a third inorganic glass substrate 5, a third film adhesive layer 6, and a fourth inorganic glass substrate 7, which are stacked sequentially.

[0029] The plexiglass substrate is made of acrylic or polycarbonate plexiglass. The first film bonding layer 2, the second film bonding layer 4, the third film bonding layer 6, and the fourth film bonding layer 8 are made of PVB, EVA, or TPU, and all three layers are made of the same material. The first inorganic glass substrate 1, the second inorganic glass substrate 3, the third inorganic glass substrate 5, the fourth inorganic glass substrate 7, and the pressure plate glass 10 are semi-tempered glass or silicate white glass.

[0030] S3. A fourth adhesive layer opening with a diameter of S2 is made on the fourth adhesive layer 8 through the pressure plate glass 10.

[0031] S4. The inorganic glass assembly, the fourth film bonding layer 8, the organic glass substrate 9 and the pressure glass 10 are stacked together in sequence to form a first laminate, and the edges of the first laminate are fixed.

[0032] S5. Select a silicone strip 11 with a rectangular cross-section and wrap it with a release cloth. The length of the silicone strip 11 is S3 = πS2 + δ, where δ = 0 ~ 2 mm.

[0033] S6. Cut and grind the auxiliary blocking circular tool 12. The diameter of the auxiliary blocking circular tool 12 is S4=S2-d, where d is the thickness of the wrapped silicone strip 11. Wrap the wrapped silicone strip 11 around the outside of the auxiliary blocking circular tool 12 and fix it. Then, place the auxiliary blocking circular tool 12 with the silicone strip 11 wrapped around it into the organic glass opening and the opening of the cover glass of the organic glass substrate 9. Cut a circular breathable felt 13 with a diameter S6=S1. Fill the inorganic glass opening of the inorganic glass assembly with the circular breathable felt 13.

[0034] After the auxiliary plugging circular tool 12 is placed into the plexiglass openings of the plexiglass substrate 9 and the openings of the cover glass, the surface of the auxiliary plugging circular tool 12 is flush with the upper surface of the cover glass 10. After the circular breathable felt 13 fills the inorganic glass openings of the inorganic glass assembly, the bottom surface of the circular breathable felt 13 is flush with the bottom surface of the inorganic glass assembly.

[0035] S7. Completely wrap the first laminate with two polyurethane films, ensuring the two films are in contact and sealed at all four sides. Then, evacuate the inside of the two polyurethane films to form the second laminate. Perform vacuum extraction in an environment with a temperature of 15–30℃ and humidity ≤55%, controlling the vacuum pressure at 0.08–0.1 MPa, and the vacuum extraction time is 4–6 hours.

[0036] S8. The second laminate is heat-treated to eliminate the stress at the opening edge. After exiting the autoclave, the polyurethane film, pressure plate glass, auxiliary plugging circular tool and circular breathable felt are removed, and finally, open-pore organic laminated glass with reduced internal stress is formed.

[0037] The second-layer composite material is placed in an autoclave for heat treatment. The autoclave is heated to 50°C and pressurized to 0.2 MPa in the first stage, and held for 60 minutes. In the second stage, the temperature is increased to 80°C and the pressure is increased to 0.6 MPa, and held for 60 minutes. In the third stage, the temperature is further increased to 100°C and the pressure is increased to 1.2 MPa, and held for 120 minutes. In the fourth stage, the temperature is decreased to 32°C and held for 50 minutes. The autoclave door is opened when the pressure drops to 0. The heating frequency of the autoclave is 1.3°C / minute, and the cooling frequency is 0.7°C / minute.

[0038] This invention provides a bonding method for single-hole plexiglass and inorganic glass that reduces stress at the opening edge, solving the problem of cracking at the opening edge of inorganic glass in the prior art.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A method for reducing the stress of the edge of a single hole of organic glass and inorganic glass, characterized in that The method comprises the following steps: S1, the inorganic glass opening diameter of the inorganic glass assembly is S1, the organic glass opening diameter of the organic glass substrate and the opening diameter of the pressing plate glass are S2, wherein S1>S2 and S1-S2=2-3mm; S2, a plurality of inorganic glass substrates are stacked to form the inorganic glass assembly, a bonding layer is arranged between two adjacent inorganic glass substrates, and after the stacking is completed, the excess part of the bonding layer is removed and the inorganic glass opening is exposed; S3, a fourth bonding layer opening with a diameter of S2 is opened on the fourth adhesive layer by the pressing plate glass; S4, the inorganic glass assembly, the fourth adhesive layer, the organic glass substrate and the pressing plate glass are sequentially stacked together to form a first stack, and the edges of the first stack are fixed; S5, a silica gel strip with a rectangular cross section is selected, and the silica gel strip is wrapped with release cloth; S6, a grinding auxiliary plugging round tool is cut, the diameter S4 of the auxiliary plugging round tool is S2-d, wherein d is the thickness of the wrapped silica gel strip, the wrapped silica gel strip is wound outside the auxiliary plugging round tool and fixed, then the auxiliary plugging round tool with the wound silica gel strip is placed in the organic glass opening of the organic glass substrate and the opening of the pressing plate glass, a circular breathable felt is cut and the diameter S6 of the circular breathable felt is S1, and the inorganic glass opening of the inorganic glass assembly is filled with the circular breathable felt; S7, two pieces of polyurethane film completely wrap the first stack, the two pieces of polyurethane film are in contact and sealed around, and then the two pieces of polyurethane film are internally vacuumed to form a second stack; S8, the second stack is heat treated to eliminate the opening edge stress.

2. The method of claim 1, wherein the method is characterized by: The inorganic glass assembly comprises a first inorganic glass substrate, a first adhesive layer, a second inorganic glass substrate, a second adhesive layer, a third inorganic glass substrate, a third adhesive layer and a fourth inorganic glass substrate which are sequentially stacked.

3. The method of claim 1, wherein the method further comprises: applying a primer to the edge of the hole in the inorganic glass; and applying a sealant to the edge of the hole in the inorganic glass. In the step S5, the length S3 of the silica gel strip is πS2+δ, wherein δ=0-2mm.

4. The method of claim 1, wherein the method further comprises: applying a primer to the edge of the hole in the inorganic glass. In the step S6, after the auxiliary plugging round tool is placed in the organic glass opening of the organic glass substrate and the opening of the pressing plate glass, the surface of the auxiliary plugging round tool is flush with the upper surface of the pressing plate glass.

5. The method of claim 1, wherein the method further comprises: applying a primer to the edge of the hole in the inorganic glass. In the step S6, after the circular breathable felt fills the inorganic glass opening of the inorganic glass assembly, the bottom surface of the circular breathable felt is flush with the bottom surface of the inorganic glass assembly.

6. The method of claim 1, wherein the method further comprises: applying a primer to the edge of the hole in the inorganic glass. In the step S7, the vacuum extraction is performed in an environment with a temperature of 15-30℃ and a humidity of ≤55%, and the vacuum extraction time is 4-6 hours.

7. The method of claim 1, wherein the method further comprises: applying a primer to the edge of the hole in the inorganic glass. In the S8, the second stack is sent into a high-pressure kettle for heat treatment, in the first stage, the high-pressure kettle is heated to 50℃ and pressurized to 0.2MPa at the same time, and maintained for 60 minutes, in the second stage, the temperature is increased to 80℃, and the pressure is increased to 0.6MPa, and maintained for 60 minutes, in the third stage, the temperature is continuously increased to 100℃, the pressure is increased to 1.2MPa, and maintained for 120 minutes, in the fourth stage, the temperature is decreased to 32℃, and maintained for 50 minutes, and when the pressure decreases to 0MPa, the kettle door of the high-pressure kettle is opened.

8. The method of claim 7, wherein the method further comprises: applying a coating to the edge of the hole in the inorganic glass. The temperature increasing frequency of the high-pressure kettle is 1.3℃ / minute, and the temperature decreasing frequency is 0.7℃ / minute.

9. The method of claim 2, wherein the method further comprises: applying a coating to the edge of the hole in the inorganic glass. The first, second, third and fourth adhesive layers are made of PVB, EVA or TPU. The first, second, third and fourth adhesive layers are made of PVB, EVA or TPU. The first, second, third and fourth adhesive layers are made of PVB, EVA or TPU. The first, second, third and fourth adhesive layers are made of PVB, EVA or TPU.

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