Method for implanting metal connecting piece in multi-layer laminated glass

Abstract

The invention relates to a method for implanting a metal connecting piece in multi-layer laminated glass, which is characterized in that a metal piece is arranged in a non-edge part of the laminated glass, and a gauze strip penetrates through an upper hole and a lower hole due to the absence of an external ventilation channel, so that gas around the metal connecting piece forms a gas path through gauze textures in a vacuumizing process and is discharged; therefore, the adhesive sheet and the metal connecting piece are firmly adhered and are not easy to open.

Description

Background Art

[0001] The invention relates to the field of glass processing, in particular to a method for implanting metal connectors inside multi-layer laminated glass. Technical Field

[0002] With the development of society, people's living conditions are constantly improving, and the pursuit of unique and perfect designs is increasing. The crystal clear, luxurious and dignified glass is deeply loved by the majority of people. Glass stairs, glass beams, glass handrails, etc. have become indispensable parts of specialty stores and family mansions. At the beginning, glass railings were installed on the ground. A few titanium parts were only used to connect the glass and did not allow it to withstand much force. The Chinese invention patent "Method for pre-embedded metal parts in laminated glass" discloses a method for pre-embedded U-shaped metal parts in the connection of laminated glass. Since the pre-embedded titanium parts are U-shaped, the patent discloses that the U-shaped parts are placed with auxiliary tools and maintain their shape. Since it is at the edge of the glass, that is, one end face of the titanium part is exposed to the outside, the gas around the part can be completely discharged along the gap of the edge of the glass by vacuuming during the production process, which has little effect on the subsequent lamination and lamination process.

[0003] In order to pursue the perfect visual effect and give people a wider field of vision and more space, the glass railing glass beam is hoisted and suspended. The strength of the glass itself is not safe enough, so titanium parts must be embedded to strengthen the strength of the force. At the same time, these titanium alloy parts need to be connected with other parts. That is, the embedded titanium parts are completely sealed inside the glass, surrounded by glass on all sides, and the titanium parts are relatively large. If there is gas around the parts that cannot be discharged smoothly, bubbles will form at the film position, or the parts will not be firmly bonded, causing debonding, which will affect the appearance and performance of the laminated glass. Summary of the invention

[0004] In response to the needs in the above-mentioned field, the present invention provides a method for implanting metal connectors in multi-layer laminated glass, which can ensure that the gas around the metal connectors is discharged smoothly, the film and the metal connectors are firmly bonded, and the metal connectors achieve the effect of sharing the force.

[0005] A method for implanting a metal connector in a multi-layer laminated glass, wherein the metal connector is block-shaped and has through holes on the surface, the multi-layer laminated glass comprises at least four sheets of glass, and the four or more sheets of glass are connected by a film, and the metal connector is located inside the middle layer of glass between the upper and lower sheets of glass, and the method comprises the following steps:

[0006] 1) Cutting and grinding of original glass: Cut and grind the glass, make holes at the through-hole positions of the upper and lower glass corresponding to the metal connectors, dig notches at the positions of the middle glass corresponding to the metal connectors, and then temper and homogenize the glass;

[0007] 2) Laying the pieces together: Place a vacuum bag cut to the right size of the glass on the table, stack the lower glass and the middle glass from bottom to top, and use film to separate the glass. Use adhesive to wipe the edge of the glass gap and the surface of the metal connector. Put the metal connector into the gap of the middle glass, stuff the gaps around it with film strips, and fasten the entire metal connector in the gap of the glass. Then, place film on the middle layer, stack the upper glass on it, remove the film on the openings of the upper and lower glass, and align the holes of the upper and lower glass through the gaps.

[0008] 3) Vacuum bag: On the assembled glass, use a mesh strip to connect the upper and lower holes, then pull at least one end to the edge of the glass and fix it with high-temperature tape, so that each layer of glass film can contact the mesh, put the silicone plug into the upper and lower glass holes, and then hot-melt the edges of the upper and lower vacuum bags together to form a sealed bag, leaving an exhaust port for exhaust, and put it into the autoclave for high-pressure vacuuming;

[0009] 4) Autoclave molding: The metal connectors and glass are firmly bonded under high temperature and high pressure to complete the glass lamination process.

[0010] 5) Remove the mesh strips and silicone plugs.

[0011] The mesh strips are made of high temperature resistant nylon.

[0012] The film is SGP film.

[0013] The size of the gap is the external dimensions of the metal connector plus the thickness of the SGP film, and the tolerance is controlled within 0.2mm.

[0014] Before applying the adhesive to the metal connector, first use a dry cloth with water to wipe off the dust on the surface of the object, then spray the surface of the part with anhydrous ethanol, wipe it clean with a dust-free cloth, and then wipe the adhesive.

[0015] The adhesive is 4-aminopropyltriethoxysilane, and the application amount is 20-30g / m 2 .

[0016] The laminating process in step 4) includes: a) entering the autoclave and first cold-evacuating and exhausting for 2 hours, filling the pressure, gradually heating up to 53 degrees and keeping the temperature for 30 minutes, then heating up to 90 degrees and keeping the temperature for 1 hour, and then keeping the temperature at 120 degrees for 2 hours; b) raising the temperature to 135 degrees in 40 minutes, raising the internal pressure of the autoclave to 1.25 MPa, and keeping the temperature for 180 minutes to make the internal sandwich completely liquid; c) then entering a rapid cooling process and the temperature reaches 90 degrees in 20 minutes, the film changes from liquid to paste, and then slowly cooling from 90 degrees to 78 degrees, controlling at 0.2 degrees per minute, keeping the temperature at 78 degrees for 60 minutes, and finally quickly dropping from 78 degrees to room temperature, and releasing the pressure when the temperature drops to 40 degrees until there is no pressure in the autoclave.

[0017] The multi-layer laminated glass comprises four sheets of glass, two sheets of middle layer glass, and the metal connector is built in the two middle sheets of glass.

[0018] Before the metal connector is built into the two middle sheets of glass, the film in the gap between the two middle sheets of glass is removed.

[0019] The method for removing the film from the notch and the hole is to use a hot air gun to heat the edge film of the notch and the hole to soften the film, and then use a utility knife to cut the film along the edge.

[0020] The material of the metal connecting piece is titanium alloy.

[0021] Since there is no external ventilation channel for the built-in metal parts on the non-edge of the laminated glass, the present invention adopts mesh strips to penetrate the upper and lower holes, so that the gas around the metal connecting parts can be discharged through the air path formed by the mesh texture during the vacuuming process, so that the film and the metal connecting parts are firmly bonded without easy glue cracking.

[0022] The present invention also uses silica gel plugs to plug the holes on the upper and lower glass sheets, which can fix the mesh strips on one hand and prevent the melted SGP film from overflowing during the high temperature and high pressure process, thereby affecting the appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the laminated glass forming diagram of the present invention,

[0024] Figure 2 for Figure 1 AA section view in the figure,

[0025] Figure 3 is a top view of glass 1 and 4.

[0026] Figure 4 is a top view of glass 2 and 3.

[0027] Figure 5 It is a top view of the method process of the present invention,

[0028] Figure 6 for Figure 5 The BB section view in the figure,

[0029] The numbers are listed as follows: 1-glass, 2-glass, 3-glass, 4-glass, 5-titanium part, 6-SGP film, 7-mesh strip, 8-hole, 9-rubber plug, 10-laminated glass, 11-gap. DETAILED DESCRIPTION

[0030] The mesh strips, silicone plugs and various chemical reagents mentioned below are all commercially available.

[0031] like Figure 1 , Figure 2 As shown, the laminated glass 10 is configured as follows: 12 super steel homogeneous glass 1+1.52SGP film 6+12 super steel homogeneous glass 2+3.04SGP film 6+12 super steel homogeneous glass 3+1.52SGP film 6+12 super steel homogeneous glass 4. The titanium part 5 is embedded in the notch between the two middle pieces of glass. The size of the titanium part 5 is 240mm*240mm*27mm, and there are 4 connecting holes 8 with a hole size of 22mm.

[0032] Although the present invention describes four-glass lamination in detail, it is applicable to lamination processes with more than three glasses, and all of them are within the scope of protection of the present invention.

[0033] Process steps: Figure 1-6 shown.

[0034] 1. Cutting and grinding of original glass: First, cut and grind glass 1, 2, 3, and 4. Glass 1 and 4 are the lower and upper sheets of laminated glass. Then, punch holes 8 according to the drawing requirements. Glass 2 and 3 are notched 11 according to the drawing. These 4 sheets of glass are cut, edged, punched, notched, and then tempered and homogenized. Figure 3 , Figure 4 shown.

[0035] 2. Lay the pieces together: Place a vacuum bag cut to the right size for the glass on the table, place glass 1 on the vacuum bag, then place 1.52 SGP film 6, then place glass 2 on the film, move glass 2 to align the four sides of glass 1, then place another layer of SGP film 6 on glass 2, place glass 3, move glass 3 to align with glass 2, use a hot air gun to heat the SGP film 6 between glass 3 and glass 2 along the notch 11 dug by glass 3 to soften the film, then use a utility knife to cut the SGP film 6 along the edge of the notch 11 dug by glass 3. Cut and remove the SGP with the notch to form a hollow notch 11. Use the same method to remove the position of the hole 8 corresponding to the film between glass 2 and glass 1. Take the titanium part for measurement. The external dimension tolerance is controlled within 0.2mm. If it meets the requirements, wipe the titanium part carefully, especially the oil stains on the surface of the part. First, use a dry cloth with water to wipe off the dust on the surface of the object, then spray the surface of the part with anhydrous ethanol, wipe it clean with a dust-free cloth, and then use adhesive to wipe the edge of the glass notch and the surface of the part. After the whole is evenly applied, put the titanium part 5 into the notch 11 of the glass, and the hole 8 of the titanium part 5 should be aligned and overlapped with the hole 8 of the glass 1. After the titanium part 5 is placed in the gap 11, the gaps around the titanium part 5 are stuffed with the cut SGP films 6, and the entire titanium part 5 is fastened in the gap 11 of the glass. The tightness of the gaps of the SGP films 6 around the inspection piece is moderate. Generally speaking, when digging a gap, the size of the titanium part plus the SGP should be less than 0.2mm, and it can be pushed in with a little force. Finally, put the SGP film 6 on and then put the upper glass 4 on, align the position of the hole 8, and then use a hair dryer and a utility knife to dig out the SGP film in the hole 8 to complete the glass assembly.

[0036] 3. Vacuum tape: On the laminated glass, insert one end of the mesh strip 7 into the glass hole 8. Make sure it passes through the entire inner hole end surface to ensure that each layer of the 4 layers of glass can contact the mesh. Then put the silicone plug 9 into the glass hole 8, pull the other end of the mesh strip 7 to the edge of the glass and fix it with high-temperature tape. The purpose is to allow the gas around the piece to be discharged through the mesh texture during the vacuuming process. Then cover the glass with a vacuum bag, and hot-melt the edges of the upper and lower vacuum bags together to form a sealed bag. Leave a vacuum port for vacuuming, and put it into the autoclave for high-pressure vacuuming. Figure 5-6 shown.

[0037] 4. Autoclave process: Enter the autoclave for staged exhaust and first cold pump for 2 hours, gradually heat up to 53 degrees and keep warm for 30 minutes, then heat up to 90 degrees and keep warm for 1 hour, and then keep warm at 120 degrees for 2 hours. It takes 40 minutes to raise the temperature to 135 degrees, the pressure inside the autoclave rises to 1.25 MPa, keep warm for 180 minutes to make the internal sandwich completely liquid, and then enter the rapid cooling for about 20 minutes to reach 90 degrees, the film changes from liquid to paste, and then slowly cool down from 90 degrees to 78 degrees at 0.2 degrees per minute. In order to minimize the temperature difference between the inside and outside of the laminated glass, keep the temperature at 78 degrees for 60 minutes, and finally quickly drop from 78 degrees to room temperature to complete the entire autoclave opening process. In this process, the autoclave will start to be pressurized from the beginning of heating, and the pressure will reach 1.25 MPa when the temperature reaches 80 degrees, and then release the pressure (i.e., deflate) until the temperature drops to 40 degrees. When there is no pressure in the autoclave, open the autoclave door and pull out the glass rack, and the glass laminating process is completed.

[0038] 5. Take out the silicone plug 9 and the mesh strip 7.

[0039] The invention provides a multi-layer laminated glass with an embedded metal connector. The gas around the metal connector is discharged smoothly, the film and the metal connector are firmly bonded without debonding, and the product is beautiful.

Claims

1. A method for implanting a metal connector in a multi-layer laminated glass, wherein the metal connector is block-shaped and has through holes on the surface, the multi-layer laminated glass comprises at least four sheets of glass, and the four or more sheets of glass are connected by a film, and the metal connector is located inside the middle layer of glass between the upper and lower sheets of glass, and the method comprises the following steps: 1) Cutting and grinding of original glass: Cut and grind the glass, and make holes at the through-hole positions of the upper and lower glass corresponding to the metal connectors. Dig a notch at the position of the metal connector on the middle layer of glass, and then temper and homogenize the glass; 2) Laying the pieces together: Place a vacuum bag cut to the right size of the glass on the table, stack the lower glass and the middle glass from bottom to top, and use film to separate the glass. Use adhesive to wipe the edge of the glass gap and the surface of the metal connector. Put the metal connector into the gap of the middle glass, stuff the gaps around it with film strips, and fasten the entire metal connector in the gap of the glass. Then, place film on the middle layer, stack the upper glass on it, remove the film on the openings of the upper and lower glass, and align the holes of the upper and lower glass through the gaps. 3) Vacuum bag: On the assembled glass, use a mesh strip to connect the upper and lower holes, then pull at least one end to the edge of the glass and fix it with high-temperature tape, so that each layer of glass film can contact the mesh, put the silicone plug into the upper and lower glass holes, and then hot-melt the edges of the upper and lower vacuum bags together to form a sealed bag, leaving an exhaust port for exhaust, and put it into the autoclave for high-pressure vacuuming; 4) Autoclave molding: The metal connectors and glass are firmly bonded under high temperature and high pressure to complete the glass lamination process. 5) Remove the mesh strips and silicone plugs.

2. According to the method of claim 1, the mesh strips are made of high temperature resistant nylon.

3. The method according to claim 1, wherein the film is an SGP film, and the material of the metal connector is a titanium alloy.

4. According to the method of claim 3, the size of the gap is the external dimensions of the metal connector plus the thickness of the SGP film, and the tolerance is controlled within 0.2 mm.

5. According to the method of claim 1, before applying the adhesive to the metal connector, first use a dry cloth with water to wipe off the dust on the surface of the object, then spray the surface of the part with anhydrous ethanol, wipe it clean with a dust-free cloth, and then wipe the adhesive.

6. The method according to claim 5, wherein the adhesive is 4-aminopropyltriethoxysilane and the application amount is 20-30 g / m 2 .

7. The method according to claim 1, wherein the laminating process in step 4) comprises: a) After entering the autoclave, first cold pump out the air for 2 hours, then pressurize and gradually heat it up to 53 degrees and keep it for 30 minutes, then heat it up to 90 degrees and keep it for 1 hour, and then keep it at 120 degrees for 2 hours; b) Use 40 minutes to raise the temperature to 135 degrees, and the internal pressure of the autoclave to 1.25 MPa, and keep it for 180 minutes to make the internal clips completely liquid; c) Then enter the rapid cooling mode and use 20 minutes to reach the temperature of 90 degrees, the film changes from liquid to paste, and then slowly cool down from 90 degrees to 78 degrees, controlled at 0.2 degrees per minute, and keep the temperature at 78 degrees for 60 minutes, and finally quickly drop from 78 degrees to room temperature, and release the pressure when the temperature drops to 40 degrees until there is no pressure in the autoclave.

8. The method according to claim 1, wherein the multi-layer laminated glass comprises four sheets of glass, the middle layer of glass comprises two sheets, and the metal connector is built in the two middle sheets of glass.

9. The method according to claim 8, wherein before the metal connector is built into the middle two sheets of glass, the film in the gap between the two sheets of glass is removed.

10. The method according to claim 1, wherein the method for removing the film from the notch and the hole is to use a hot air gun to heat the edge film of the notch and the hole to soften the film, and then use a utility knife to cut the film along the edge.

Images