Laminating processing method of oversized laminated glass

Abstract

The invention provides a laminated processing method of oversized laminated glass, and belongs to the technical field of fine and deep processing of glass. Comprising the following steps: S1, cutting, grinding and washing: taking a glass raw sheet, cutting the glass raw sheet to a proper specification according to processing requirements, carrying out edge grinding treatment on the glass raw sheet, and after edge grinding is completed, feeding the glass into an interlayer cleaning machine for cleaning and air drying to obtain a glass substrate; water used by the interlayer cleaning machine is pure water, the interference amount of a brush is-2mm, and the cleaning machine selects a correct height according to the thickness of the glass; the conductivity of pure water is required to be less than 30 [mu] s / cm. The water temperature is 40-60 DEG C; the treated glass substrates are fed into a lamination station for lamination operation, an ionic intermediate film is adopted as an interlayer intermediate diaphragm, the temperature of a lamination chamber is 22-28 DEG C, and the humidity of the lamination chamber is 18%-28%; and a glass tin surface, an ion spacing membrane and a glass tin surface are combined. The method has the advantage that quality problems such as bubbles and degumming cannot occur in the later period.

Description

Technical Field

[0001] The invention belongs to the technical field of glass deep processing, and in particular relates to a lamination processing method for super-large laminated glass. Background Art

[0002] At present, the structure of interlayer SGP products is processed by vacuuming process, in which the semi-finished product is first wrapped with baili cloth to protect the air-conducting needle cotton from being sucked into the interlayer. Then the air-conducting needle cotton is used to wrap the outside to guide the air out of the interlayer. Finally, a vacuum bag is used to seal it, and a vacuum pump is used to continuously vacuum the wrapped laminated glass. The glass is then sent to the autoclave for autoclave treatment.

[0003] However, in traditional autoclave operation, when the temperature inside the autoclave rises to 80°C, the autoclave is inflated and pressurized. When heated, the edges of the laminated glass are heated faster, which causes the edges to be sealed in advance. The air inside the laminated glass cannot be discharged, and there is residual gas inside later, which leads to quality problems of the glass. In order to avoid bubbles or delamination later, we need to optimize the processing technology of laminated glass to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a processing method for reducing stress spots in tempered glass in view of the above-mentioned problems existing in the prior art, aiming at reducing the generation of stress spots in the glass tempering process.

[0005] The object of the present invention can be achieved by the following technical scheme: A lamination processing method for super large laminated glass, characterized in that the method comprises the following steps:

[0006] S1. Cutting, grinding and washing: Take the original glass sheet and cut it to the appropriate specifications according to the processing requirements, and grind it. After the grinding is completed, the glass is sent to the interlayer washing machine for cleaning and air drying to obtain the glass substrate; the interlayer washing machine uses pure water, the brush interference is -2 mm, and the correct height of the washing machine is selected according to the thickness of the glass; the conductivity of pure water is required to be less than 30μs / cm. The water temperature is 40-60℃;

[0007] S2, Lamination: Send the processed glass substrate to the lamination station for lamination operation. The interlayer intermediate membrane adopts an ion-type intermediate membrane. The temperature of the lamination room is 22-28°C and the humidity is 18%-28%. The lamination is carried out in the form of glass tin surface + ion interval membrane + glass tin surface.

[0008] S3, Pre-rolling: After the glass is assembled, it is sent to the rolling equipment for rolling treatment. The temperature of the rolling preheating section is 80-100℃. The distance between the rollers in the pre-rolling section should be about 5% less than the total thickness of the glass and the film. After the first roller, the surface temperature of the glass is maintained at 35-45℃.

[0009] S4, heating roller pressing: the temperature of the heating roller pressing section is 160-200℃, the roller spacing of the heating roller pressing section should be about 10% less than the total thickness of the glass and the film, and the surface temperature of the glass after the heating roller pressing section is maintained at 60-65℃;

[0010] S5. Wrapping: neatly stack the laminated glasses that have been laminated and rolled together, and stick PET film on the outer circumference of the stacked laminated glasses. It should be noted that the PET film cannot completely wrap the outer circumference of the stacked glass, but a 1-2 cm gap must be reserved at the four corners;

[0011] S6. Vacuuming: Put the wrapped laminated glass into a vacuum bag for sealing, and install a vacuum nozzle for vacuuming;

[0012] S7, Autoclave: The laminated glass that has completed vacuum bag sealing is sent into the autoclave for autoclave operation, and during this process, it is continuously vacuumed. The specific process of autoclave operation is as follows:

[0013] A. Heating without increasing pressure: After the glass enters the autoclave, the autoclave is heated at a rate of 5°C / min; after the temperature reaches 120 degrees, it is kept warm for 20 minutes;

[0014] B. Temperature and pressure increase: After the holding time is up, the autoclave is heated again to raise its temperature to 130-150°C; after reaching the temperature, the autoclave is pressurized at a rate of 0.6MPA / min to make the pressure inside the autoclave reach 1.0-1.5MPA;

[0015] C. Insulation and pressure: After the temperature and pressure reach the process requirements, the autoclave is insulated for 40 to 60 minutes to ensure that the film and glass are fully bonded;

[0016] D. Cooling and pressure reduction: After the required time of heat preservation and pressure maintenance is reached, the autoclave is cooled down to reduce the temperature inside the autoclave to below 50°C. The cooling time is 30 to 60 minutes. After the temperature is reached, the autoclave is pressure-released.

[0017] After the high-pressure calcination is completed, the super-large laminated glass can be obtained.

[0018] Advantages of the present invention:

[0019] 1. The method of the present invention can fully discharge the residual air in the super-large laminated glass, thereby ensuring that there will be no quality problems such as bubbles and debonding in the later stage. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0021] A lamination processing method for super large laminated glass comprises the following steps:

[0022] S1. Cutting, grinding and washing: Take the original glass sheet and cut it to the appropriate specifications according to the processing requirements, and grind it. After the grinding is completed, the glass is sent to the interlayer washing machine for cleaning and air drying to obtain the glass substrate; the interlayer washing machine uses pure water, the brush interference is -2 mm, and the correct height of the washing machine is selected according to the thickness of the glass; the conductivity of pure water is required to be less than 30μs / cm. The water temperature is 40-60℃;

[0023] S2, Lamination: Send the processed glass substrate to the lamination station for lamination operation. The interlayer intermediate membrane adopts an ion-type intermediate membrane. The temperature of the lamination room is 22-28°C and the humidity is 18%-28%. The lamination is carried out in the form of glass tin surface + ion interval membrane + glass tin surface.

[0024] S3, Pre-rolling: After the glass is assembled, it is sent to the rolling equipment for rolling treatment. The temperature of the rolling preheating section is 80-100℃. The distance between the rollers in the pre-rolling section should be about 5% less than the total thickness of the glass and the film. After the first roller, the surface temperature of the glass is maintained at 35-45℃.

[0025] S4, heating roller pressing: the temperature of the heating roller pressing section is 160-200℃, the roller spacing of the heating roller pressing section should be about 10% less than the total thickness of the glass and the film, and the surface temperature of the glass after the heating roller pressing section is maintained at 60-65℃;

[0026] This process will not seal the edges of the glass when rolling it, but can expel some of the air between the film and the glass, thereby making the two glass substrates evenly aligned with the film to prevent the glass from being misaligned.

[0027] S5. Wrapping: neatly stack the laminated glasses that have been laminated and rolled together, and stick PET film on the outer circumference of the stacked laminated glasses. It should be noted that the PET film cannot completely wrap the outer circumference of the stacked glass, but a 1-2 cm gap must be reserved at the four corners;

[0028] Since the white lining is a fabric, its surface has texture. If the white lining is directly used to wrap the laminated glass, the melted film will form a sealing edge with texture on the edge of the laminated glass, which makes the edge of the laminated glass white and the transparency effect is poor. However, using a smooth PET film to wrap the edge of the laminated glass can improve this problem. At the same time, considering that a vacuum pump is needed to continuously extract and remove the air between the glass and the film, the PET film needs to leave gaps at the four corners of the glass to allow the air in the laminated glass to be discharged smoothly.

[0029] S6. Vacuuming: Put the wrapped laminated glass into a vacuum bag for sealing, and install a vacuum nozzle for vacuuming;

[0030] S7, Autoclave: The laminated glass that has completed vacuum bag sealing is sent into the autoclave for autoclave operation, and during this process, it is continuously vacuumed. The specific process of autoclave operation is as follows:

[0031] A. Heating without increasing pressure: After the glass enters the autoclave, the autoclave is heated at a rate of 5°C / min; after the temperature reaches 120 degrees, it is kept warm for 20 minutes;

[0032] In this state, since no external pressure is applied to the laminated glass, the edge of the glass will not adhere to the film, so the edge will not be sealed in advance, and the film is in a viscous flow state, and the vacuum pump continues to vacuum the glass, which can extract and exhaust the residual air in the film to ensure that there is no residual gas inside the laminated glass.

[0033] B. Temperature and pressure increase: After the holding time is up, the autoclave is heated again to raise its temperature to 130-150°C; after reaching the temperature, the autoclave is pressurized at a rate of 0.6MPA / min to make the pressure inside the autoclave reach 1.0-1.5MPA;

[0034] The autoclave is pressurized, that is, external pressure is applied to the laminated glass, so that the two substrates of the laminated glass are continuously squeezed toward the middle film, thereby combining the three together tightly.

[0035] C. Insulation and pressure: After the temperature and pressure reach the process requirements, the autoclave is insulated for 40 to 60 minutes to ensure that the film and glass are fully bonded;

[0036] D. Cooling and pressure reduction: After the required time of heat preservation and pressure maintenance is reached, the autoclave is cooled down to reduce the temperature inside the autoclave to below 50°C. The cooling time is 30 to 60 minutes. After the temperature is reached, the autoclave is pressure-released.

[0037] After the high-pressure calcination is completed, the super-large laminated glass can be obtained.

[0038] In the method, when the autoclave is fired, the autoclave is first heated and pressurized, and after the temperature is raised to 120° C., it is kept warm for 20 minutes, so that the films in each laminated glass are fully softened and melted to a viscous flow state, and then the vacuum pump is convenient for exhausting the residual air in each laminated glass, which can effectively avoid the quality problems of bubbles, debonding, etc. in the later stage of the super-large laminated glass, and effectively ensure the quality of the product.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A lamination processing method for super large laminated glass, characterized in that: This method comprises the following steps: S S1. Cutting, grinding and washing: Take the original glass sheet and cut it to the appropriate specifications according to the processing requirements, and grind it. After the grinding is completed, the glass is sent to the interlayer washing machine for cleaning and air drying to obtain the glass substrate; the interlayer washing machine uses pure water, the brush interference is -2 mm, and the correct height of the washing machine is selected according to the thickness of the glass; the conductivity of pure water is required to be less than 30μs / cm. The water temperature is 40-60℃; S2, Lamination: Send the processed glass substrate to the lamination station for lamination operation. The interlayer intermediate membrane adopts an ion-type intermediate membrane. The temperature of the lamination room is 22-28°C and the humidity is 18%-28%. The lamination is carried out in the form of glass tin surface + ion interval membrane + glass tin surface. S3, Pre-rolling: After the glass is assembled, it is sent to the rolling equipment for rolling treatment. The temperature of the rolling preheating section is 80-100℃. The distance between the rollers in the pre-rolling section should be about 5% less than the total thickness of the glass and the film. After the first roller, the surface temperature of the glass is maintained at 35-45℃. S4, heating roller pressing: the temperature of the heating roller pressing section is 160-200℃, the roller spacing of the heating roller pressing section should be about 10% less than the total thickness of the glass and the film, and the surface temperature of the glass after the heating roller pressing section is maintained at 60-65℃; S5. Wrapping: neatly stack the laminated glasses that have been laminated and rolled together, and stick PET film on the outer circumference of the stacked laminated glasses. It should be noted that the PET film cannot completely wrap the outer circumference of the stacked glass, but a 1-2 cm gap must be reserved at the four corners; S6. Vacuuming: Put the wrapped laminated glass into a vacuum bag for sealing, and install a vacuum nozzle for vacuuming; S7, Autoclave: The laminated glass that has completed vacuum bag sealing is sent into the autoclave for autoclave operation, and during this process, it is continuously vacuumed. The specific process of autoclave operation is as follows: A. Heating without increasing pressure: After the glass enters the autoclave, the autoclave is heated at a rate of 5°C / min; after the temperature reaches 120 degrees, it is kept warm for 20 minutes; B. Temperature and pressure increase: After the holding time is up, the autoclave is heated again to raise its temperature to 130-150°C; after reaching the temperature, the autoclave is pressurized at a rate of 0.6MPA / min to make the pressure inside the autoclave reach 1.0-1.5MPA; C. Insulation and pressure: After the temperature and pressure reach the process requirements, the autoclave is insulated for 40 to 60 minutes to ensure that the film and glass are fully bonded; D. Cooling and pressure reduction: After the required time of heat preservation and pressure maintenance is reached, the autoclave is cooled down to reduce the temperature inside the autoclave to below 50°C. The cooling time is 30 to 60 minutes. After the temperature is reached, the autoclave is pressure-released. After the high-pressure calcination is completed, the super-large laminated glass can be obtained.