JP2872287B2 - Method and apparatus for bonding laminated glass - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and an apparatus for manufacturing a laminated glass.

(Prior Art) Laminated glass, for example, windshields for automobiles,
A resin film, for example, polyvinyl butyral, is interposed between a pair of curved glass plates, the laminate is passed through a heating chamber to soften the resin film, and then the pair is formed while excluding air existing between the glass plate and the resin film. Usually, the glass plate and the resin film are temporarily bonded, and then pressurized, heated and permanently bonded in an autoclave.

If the temporary adhesion is insufficient, that is, if there is a gap between the glass plate and the resin film, air bubbles remain and become defective products. Therefore, various methods have been disclosed as a method of pushing out the air bubbles by pressure bonding. No. 61-134249 discloses at least 2
A laminate in which an adhesive synthetic resin interlayer is sandwiched between two transparent bodies is placed in a vacuum pack bag, and the inside of the vacuum pack bag is evacuated. Pre-compression bonding, then heat the pre-compression bonded laminate to complete compression bonding,
Japanese Patent Application Laid-Open No. 1-159244 discloses a method for manufacturing a laminated glass in which the transparent body and the adhesive synthetic resin interlayer are bonded and integrated, and there is disclosed an apparatus for pressing a laminated glass / plastic composite, The body has lateral wings that are strongly bent in the direction of the concave side and can be used in automated plants for the production of laminated safety glass, the device for mechanically pressing glass / plastic composites and the composites in and out of the press Wherein the mechanically pressurizing device and the processing device are perpendicular to a horizontal transport plane in which the axis of rotation is moved during a processing step in which the glass / plastic composite is carried out prior to the processing operation. An apparatus for pressing a glass / plastic composite placed in various directions, and the apparatus disclosed in Japanese Patent Publication No. 58-12140 discloses a sheet of a plastic material on a smooth surface of a hard body. A flexible sheet is placed on at least one inflatable film whose periphery is fixed in a container that can be evacuated, and the surface of the rigid body to which the flexible sheet is added is applied. Placing the hard body in a horizontal position away from the film toward the flexible sheet,
Next, the pressure on both sides of the membrane is controlled to inflate the membrane, first pressing the center of the flexible sheet against the surface of the rigid body, and then radially from the center of the flexible sheet. A method in which the flexible sheet is sequentially pressed outward on the surface of the hard body, and further, Japanese Patent Application Laid-Open No. 55-100244 discloses a method in which a pair of substantially identical glass plates is interposed between a pair of substantially identical glass plates. The front surface of the sandwich body with the resin film interposed therebetween is heated and pre-pressed with a press roll, and the opaque area of the peripheral part of the sandwich body where the press is insufficiently pressed is further pressed with a grip having a pair of grip pieces. A method for pre-adhering a glass plate comprising a step is disclosed.

(Problems to be Solved by the Invention) Among the above techniques, those disclosed in Japanese Patent Application Laid-Open No.
The inside of the rubber bag is evacuated with a vacuum pump, and the glass plate and the resin film are pressurized at atmospheric pressure through the rubber bag. Due to the heating through the bag, there is a disadvantage that the processing time increases due to indirect heating, pressurization only at the atmospheric pressure, and the like, and in JP-A-1-159244, the glass and the resin film are heated in advance by another method. The inner air is squeezed out from one end of the glass plate with a roll, but it requires fine adjustment according to the deep bending and complicated shape of the glass. In Japanese Patent Publication No. 58-12140, the film is gradually inflated like a balloon, and the contact area between the glass sheet and the film gradually increases, but the pressing force is such that the film contacts the entire surface of the glass sheet. The pressure rises only after the For use in a high-quality laminate, there is a problem that the pressure is insufficient at the initial pressing, the movement and adhesion of the air bubbles are poor, and the degassing is poor because the entire surface is simultaneously pressurized. The ones
The pressure by the gripper corrects a defective portion due to insufficient pressurization of the press roll, and there has been a problem that a new pressurizing step has to be added to a series of steps.

(Means for Solving the Problems) The present invention has been made in view of such conventional problems,
A method of bonding laminated glass that completely eliminates voids in the laminated body and eliminates any gaps at the peripheral edge, and a device for manufacturing the laminated body by interposing a thermoplastic intermediate resin film between a pair of glass plates. In doing so, the peripheral edge of the laminate is sucked, and a pressing member is used to bond the laminated glass so as to sequentially press outward from the center of the laminate surface to increase the pressure, and further, between a pair of glass plates. In a laminated glass bonding apparatus having a pair of degassing types that abut and hold with a thermoplastic intermediate resin film interposed therebetween, the degassing type includes a number of pressure chambers partitioned by partition walls, and The upper and lower abutting portions that contact the glass plate have a glass plate pressing member made of an elastic body having a curved shape according to the shape of the glass plate,
Each of the pressure chambers is provided with a pressure fluid injection hole, and the shape of the peripheral portion of the upper and lower contact portions that abuts on the glass plate is such that a hollow portion is formed on the peripheral edge of the laminated glass plate, and the upper and lower edges of the peripheral edge of the corresponding contact portion are formed. The present invention provides a laminated glass bonding apparatus having an exhaust collecting pipe provided in the pressing member on the outer peripheral side of the cavity.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an assembled sectional view showing an essential part of an apparatus for carrying out the method of the present invention, FIG. 2 is a plan view for explaining the order of pressing loads, and FIG. 1 is a perspective view of FIG.

The laminated glass 1 with the intermediate resin film 1 ′ interposed therebetween is sandwiched by a degassing mold 2 that separates, and the degassing mold forms the surrounding frame 3, the ceiling 4, the bottom 5, etc. of metal, for example, aluminum alloy. Surrounded by heat-resistant rubber made of an elastic body,
For example, the pressure fluid injection hole 6 is made of nitrile rubber, and the partition wall 7 is formed.
A large number of pressure chambers 8 are arranged, and the contact portions 9 contacting the pressure chambers and the laminated glass 1 have a glass plate pressing member made of an elastic body curved in accordance with the shape of the glass. A pressure fluid injection hole is provided in each of the pressure chambers,
An opening that penetrates the injection hole 6 is provided in the ceiling portion 4 or the bottom portion 5 located on the opposite side of the contact portion.

Either the upper or lower surface of the upper and lower abutting portions 9, 9 that abut against the laminated glass 1 is formed with a cavity 10 in the peripheral edge according to the thickness of the laminated glass 1, and the upper and lower ends of the peripheral edge of the corresponding abutting portion are abutted. An air exhaust pipe 11 is provided around the outer periphery of the cavity, and a plurality of exhaust conduits 12 connected to the exhaust pipe are provided around the cavity 10.

An exhaust pipe 13 is connected to at least one location of the exhaust collecting pipe 11, and a tip of the exhaust pipe is connected to a vacuum pump (not shown).

The injection hole 6 is connected to a pressure source (not shown) by a pipe 14. A solenoid valve (not shown) for switching between opening and closing and switching to the atmosphere is installed in the pipe, and the pressure in the pressure chamber 8 is increased by the operation of the valve. The medium is injected, pressurized, and discharged.

The pipes 14 and 13 connecting the injection hole 6 and the exhaust manifold 11 are:
A flexible pipe is incorporated in preparation for the movement of the upper degassing mold 2 , and the opening and closing operation of the solenoid valve and the like is performed by sequentially blowing, for example, high-pressure air into each pressure chamber 8 by a relay or the like incorporated in an operation panel. Opening / closing and switching control are performed so that the pressure in the pressure chamber 8 is simultaneously released to the atmosphere.

The upper degassing type 2 is suspended vertically so that a device for turning and moving (not shown) is incorporated in the upper portion, and the laminated glass 1 is moved to the lower degassing type by another device such as a robot. It is carried into 2 and then carried out after crimping.

In consideration of heat resistance, the degassing mold 2 constituting the abutting portions 9 and 9, not only a heat-resistant elastic body, but also a glass cloth or the like is interposed between the delamination mold 2 and the laminate to be processed to increase the temperature. Degassing of the laminated glass 1 and further real bonding can be performed.

 Hereinafter, the operation of the present invention will be described.

After the glass bent in a predetermined shape is washed and dried, an interlayer film 1 'is interposed between a pair of glass plates, and the laminated glass 1 which has been preheated to a required temperature is sandwiched between upper and lower degassing dies 2 and exhausted. Vacuum is applied through the pipe 13 to suction the peripheral portion of the laminated glass 1.

Subsequently, the central part of the laminated glass 1, A shown in FIG.
By injecting high-pressure air from the injection hole 6 into the upper and lower degassing type pressure chambers 8 located around the block, further into the pressure chamber 8 around the B block, and sequentially injecting the C, D, and E blocks, the laminated glass 1 is formed. Pressed on both sides, the gap between the pair of glass plates and the intermediate resin film 1 ′ is in close contact, and the air pockets due to the gap move sequentially to the peripheral portion, and from the peripheral portion through the exhaust conduit 12, the exhaust collecting pipe 11. Is sucked.

The pressing on the laminated glass 1 is caused by the bulging of the upper and lower pressure chambers 8, but the bulging in the vertical direction is restricted by the ceiling part 4 or the bottom part 5 and the laminated glass 1,
This results in a lateral bulge.

Subsequently, by injecting high-pressure air into the adjacent pressure chamber 8, the pressure chamber 8 near the center is restricted from expanding in the lateral direction, the pressure in the pressure chamber further increases, and the pressing force on the contact portion 9 is increased. Is increased, and a two-stage pressing action of pressing when the high-pressure air is blown from the pressure chamber 8 in the atmospheric pressure state, and subsequently increasing the pressure by blowing the high-pressure air into the adjacent pressure chamber 8, moves sequentially to the outer periphery.

Only the pressure chamber 8 provided in the E block is
Due to the combination of applying a slightly higher pressure and suctioning by the exhaust collecting pipe 11, the gap at the peripheral edge of the laminated glass 1 is brought into close contact and the accumulated air is pushed out, and a series of deaeration and crimping are completed. The high pressure air in each pressure chamber 8 is released by the operation of the solenoid valve, and the pressure chambers are returned to the atmospheric pressure state and carried out.

The order of operation of the solenoid valves can be any
Complete deaeration can be performed by a combination of the pressing order of the pressure chamber 8, the time, and the like, and the pressure used may be about 3 atm.

In the device according to the invention, it is possible, for example, to carry out a pre-bonding without any hindrance in a curved or bent form, said pre-bonding being suitable for the process of continuous flow production.

(Effects of the Invention) The present invention provides a pair of glass plates by increasing the pressure applied by pressing sequentially from the center of the laminated body toward the periphery without being influenced by the shape of the laminated glass and by suctioning the periphery of the laminated body. Completely deaerates and accumulates air pockets with the intermediate resin film, and at the peripheral edge of the laminated glass, it is possible to eliminate voids by increasing the pressing load, and completely perform deaeration bonding in the workpiece. Is what you can do.

[Brief description of the drawings]

FIG. 1 is an assembled sectional view showing an essential part of an apparatus for carrying out the method of the present invention, FIG. 2 is a plan view for explaining the order of pressing loads, and FIG. 1 is a perspective view of FIG. 1 '... interlayer film, 1 ... laminated glass 2 ... degassing type, 7 ... partition wall 6 ... injection hole, 8 ... pressure chamber 11 ... exhaust manifold, 12 ... exhaust pipe

Claims (2)

(57) [Claims] When manufacturing a laminate in which a thermoplastic intermediate resin film is interposed between a pair of glass plates, a contact portion with the glass plate is curved according to the shape of the glass plate, and Using a degassing mold having a pressing member having a cavity at the periphery of the plate, the air in the cavity is exhausted to suck the periphery of the laminate, and from the center of the laminate surface A method for bonding laminated glass, comprising sequentially pressing in the outer peripheral direction to increase the pressure of the pressing member. 2. A laminated glass bonding apparatus having a pair of degassing dies which abuts and sandwiches a thermoplastic intermediate resin film between a pair of glass plates, wherein the degassing type has a pressure divided by a partition wall. While arranging a large number of chambers, the upper and lower abutting portions that come into contact with the glass plate of the pressure chamber have a glass plate pressing member made of an elastic body curved in accordance with the shape of the glass plate, and the pressure chamber has Each of the pressure fluid injection holes is provided, and the shape of the peripheral portion of the upper and lower contact portions that comes into contact with the glass plate is such that a hollow portion is formed on the peripheral edge of the laminated glass plate, and the upper and lower edges of the peripheral edge of the corresponding contact portion are closed and sealed. A laminated glass bonding apparatus, wherein an exhaust collecting pipe is provided in the pressing member on the outer peripheral side of the hollow portion.