JPH0375246A - Bonding method for laminated glass and system therefor - Google Patents

Abstract

PURPOSE:To accomplish perfect deaeration bonding of a laminated glass by making a suction of the periphery of a laminate made by putting a thermoplastic resin interlayer between a pair of glass plates and, concurrently with this, by pressing and pressure raising successively from the central part outwardly. CONSTITUTION:A laminate 1 made by putting a thermoplastic resin interlayer 1' between a pair of glass plates curvedly formed to a specified shape is preheated to a specified temperature and sandwiched by a metallic deaeration mold 2 made up of a surrounding frame 3, a ceiling 4, a bottom 5, etc. Thence, a vacuum is applied through an exhaust piping 13 connected to at least one position of an exhaust assembly pipe 11 to make a suction of the periphery of the laminate 1. A high-pressure air is then injected through injection ports 6 into pressure chambers 8 situated around the central part (A block) of the laminate 1. And high-pressure air is injected into pressure chambers 8 situated around B, C, D and E blocks successively outwardly, effecting pressing both the surfaces, thus resulting in contact bonding.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for manufacturing laminated glass.

(Prior Art) Laminated glass, such as a windshield for an automobile, is produced by interposing a resin film, such as polyvinyl butyral, between a pair of curved glass plates, passing the laminate through a heating chamber to soften the resin film, and then Usually, the pair of glass plates and the resin film are temporarily bonded together while removing the air present in the glass plate and the resin mu, and then the final bonding is carried out by applying pressure and heating in an autoclave.

Temporary adhesion is insufficient, that is, 1.
If there is 1ml, air bubbles will remain and the product will be defective, so various methods have been disclosed to remove the air bubbles by pressure bonding.
adhesive synthetic resin between at least two transparent bodies
The laminate sandwiching the laminate is placed in a vacuum pack bag, the inside of the vacuum pack bag is evacuated, the vacuum pack bag is sealed, the laminate is pre-pressed, and then the pre-pressed laminate is heated. JP-A No. 1999-11102 discloses a manufacturing method of laminated glass, which involves bonding the transparent body and HM in an adhesive luting resin to integrate them.
Publication No. 159244 discloses an apparatus for pressurizing a laminated glass/plastic composite, said composite having lateral wings strongly bent in the direction of the concave side surface, for use in an automatic plant for the production of laminated safety glass. and a device for mechanically pressurizing the glass/plastic composite and a device for moving the composite into and out of the press, wherein the mechanically pressurizing device and the processing device have a rotating shaft that is connected to the glass/plastic composite. A device for pressurizing a glass/plastic composite body placed in a direction perpendicular to the horizontal transport plane in which the body is moved r1 of the processing step carried out prior to the processing operation, and also of Japanese Patent Publication No. 58-12140, A sheet of plastic material is applied to a smooth surface of a rigid body, the flexible sheet being placed over at least one inflatable membrane fixed around its periphery in a container that can be evacuated; Place the hard body in a horizontal position with the surface of the hard body to which the flexible sheet is applied facing the flexible sheet and away from the membrane, and then inflate this membrane by controlling the pressure on both sides of the membrane at t4. First, the center of the flexible sheet is pressed against the surface of the hard body, and then the flexible sheet is sequentially pressed radially outward from the center of the flexible sheet against the surface of the hard body. How to, and even
Japanese Unexamined Patent Publication No. 55-100244 discloses that the front surface of a sandwich body formed by interposing an intermediate resin film having substantially the same shape as the glass plates between a pair of glass plates having substantially the same shape is heated and pre-pressed with a press roll. , discloses a method for pre-bonding a glass plate, which includes the step of further pressurizing the opaque area of the peripheral edge of the sandwich body where pressing is insufficient with a gripper having a pair of gripping pieces.

(Problems to be Solved by the Invention) The above technology disclosed in Japanese Patent Application Laid-Open No. 134249/1983 evacuates the inside of the rubber bag using a vacuum pump, and the glass plate and resin film are connected to each other through the rubber bag at atmospheric pressure. Although it is pressurized, the material to be deaerated is placed in a rubber bag before being pressurized, and then heated through the bag while being deaerated, so it has the disadvantage that the processing time increases due to indirect heating, pressurization using only atmospheric pressure, etc. Mochi, JP-A-1-15
In the method disclosed in Publication No. 9244, the glass and resin film are heated in advance using a separate method, and the internal air is squeezed out using a roll from one end of the glass plate. Adjustment is required, and if the adjustment is insufficient, there is a drawback that deaeration will be poor.
In the method of the publication, the membrane is gradually inflated like a balloon, and the contact area between the glass sheet and the membrane gradually increases, but the pressure increases only when the membrane is in full contact with the glass sheet. Therefore, when used for hard laminates such as laminated glass, there is a problem that the initial pressure is insufficient, the movement and adhesion of air bubbles is poor, and then the pressure is increased on the entire surface at the same time, making degassing difficult. JP-A-55-1
The method disclosed in Japanese Patent No. 00244 uses pressure from a gripping piece to correct defects caused by insufficient pressure on the press roll, and there is a problem in that a new pressurizing step must be added to the series of steps.

(Means for Solving the Problems) The present invention has been made in view of the conventional problems, and is intended to completely eliminate voids in a laminate, and also to
A method and apparatus for bonding laminated glass that eliminates u at all, when producing a laminate with a thermoplastic intermediate resin film interposed between a pair of glass plates, the periphery of the laminate is suctioned and the laminate is A bonding method for laminated glass in which the pressure is increased by sequentially pressing outward from the center of the body surface, and a pair of degassing methods in which a laminate with a thermoplastic intermediate resin film interposed between a pair of glass plates is held in contact with each other. A number of pressure chambers made of an elastic material and having pressure injection nozzles and partition walls are arranged in the mold, and an exhaust hole communicating with the periphery of the laminate is provided around the outer periphery of the pressure chambers where they gather. Provides laminated glass bonding equipment.

(Example) Hereinafter, the actual sN of the present invention will be explained based on the drawings.

Fig. 1 is an assembled sectional view showing the main parts of tiM for carrying out the method of the present invention, Fig. 2 is a plan view illustrating the order of pressing loads, and Fig. 3 is a partially cutaway view of the device of the present invention. FIG.

The laminated glass l with the intermediate resin I11' interposed therebetween is held between a separate degassing mold 2, and the degassing mold has a surrounding frame 3, a ceiling part 4, a bottom part 5, etc. made of metal, for example, an aluminum alloy. A pressure injection hole 6 is provided inside the heat-resistant rubber made of an elastic material, such as nitrile rubber, and a large number of pressure chambers 8 partitioned by partition walls 7 are arranged, and the pressure chambers come into contact with the laminated glass l. 9. 9 shows a curve according to the shape of the glass, and is located on the opposite side of the corresponding contact part, the ceiling part 4,
Alternatively, an opening hole passing through the injection hole 6 is provided in the bottom portion 5 .

Either the upper or lower surface of the upper or lower contact s9.9 that contacts the laminated glass l is adjusted to the thickness of the laminated glass l to form a cavity 10 at the periphery, and the upper and lower ends of the periphery of the corresponding contact part are brought into contact and sealed. However, an exhaust manifold pipe 11 is provided around the outer periphery of the cavity, and an exhaust conduit 12 is connected to the exhaust manifold pipe.
A plurality of are arranged around the cavity lO.

An exhaust pipe 13 is connected to at least one location of the exhaust manifold 11, and the 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) through a piping 14, but a solenoid valve (not shown) for switching between opening and closing and release to the atmosphere is incorporated in the piping, and the operation of the valve increases the pressure in the pressure chamber 8. It is used to inject, pressurize, and release the medium.

Each pipe 14.13 connecting the injection hole 6 and the exhaust manifold 11
is installed with a flexible tube in preparation for the movement of the upper degassing type-2-, and the opening and closing operations of the solenoid valves, etc. are as follows:
For example, high pressure air is blown into each pressure chamber 8 in sequence by a relay built into the operation panel, and opening/closing and switching control is performed so that the pressure in the pressure chambers 8 is simultaneously released to the atmosphere.

The upper degassing mold 1 is suspended so as to be able to move up and down, and a rotating device (not shown) is built into the upper part of the mold, and this device and other transfer devices such as robots move the laminated glass l into the lower degassing mold. 2, and after crimping, it is carried out.

In consideration of heat resistance, the degassing type 2 constituting the abutment B9.9 is made of not only a heat-resistant elastic material but also, for example, a glass cloth or the like interposed between it and the laminate to be treated to increase the temperature. Degassing of the laminated glass 1 and furthermore, main bonding can be carried out.

The present invention will be explained in detail below.

After washing and drying the glass that has been bent and shaped into a predetermined shape, the interlayer film 1 is interposed between the pair of glass plates, and the laminated glass 1, which has been preheated to a required temperature, is held between upper and lower degassing molds 2. Bacqueum is applied through the exhaust pipe 13 to draw air into the periphery of the laminated glass l.

Next, an injection hole 6 is inserted into a vertical degassing type pressure chamber 8 located in the center of the laminated glass l, around block A shown in FIG.
Inject higher pressure air and further pressure chamber 8 around B block
injection into C, D.

By successively injecting the E block, both sides of the laminated glass L are pressed, and the pair of glass plates and the intermediate resin M are pressed together.
The gaps between l' are in close contact with each other, and the air pockets due to the gaps sequentially move to the periphery and are sucked from the periphery via the exhaust conduit 12 and into the exhaust manifold 11.

Pressure on the laminated glass l is generated by the expansion of the upper and lower pressure chambers 8, but the expansion in the vertical direction is limited by the ceiling portion 4 or the bottom portion 5 and the laminated glass 1, resulting in a bulge in the lateral direction.

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. becomes larger, resulting in a two-stage pressing action of pressure caused by blowing high-pressure air from the pressure chamber 8 in the atmospheric pressure state, and subsequent pressurization by the blowing of high-pressure air from the adjacent pressure chamber 8, and this action sequentially moves toward the outer periphery.

Only the pressure chamber 8 disposed in the E block uses a combination of applying a slightly higher pressure than the other pressure chambers 8 and suction from the exhaust manifold pipe 11 to close the gap at the periphery of the laminated glass 1 and prevent accumulation. After the air is pushed out and a series of degassing and crimping is completed, the high-pressure air in each pressure chamber 8 is released by actuation of a solenoid valve (not shown), and the pressure chamber is returned to atmospheric pressure and transported out.

The operating order of the electromagnetic valves can be set in any order, and complete degassing can be achieved by combining the order of pressing the pressure chambers 8, the time, etc., and the pressure used may be about 3 atmospheres. .

With the device of the invention, it is possible to pre-glue, for example, curved or bent shapes without any hindrance, and the pre-gluing is suitable for continuous flow production processes.

(Effects of the Invention) The present invention sequentially presses from the center toward the periphery without being influenced by the shape of the laminated glass, and further applies pressure increase and suction at the periphery to connect the pair of glass plates and the intermediate 4MJI.
! By completely deaerating the air pockets between the laminated glass and bonding it, increasing the pressure load at the periphery of the laminated glass, it is possible to eliminate voids and completely deaerate the objects to be bonded. It is possible.

[Brief explanation of drawings]

Fig. 1 is an assembled sectional view showing the main parts of the apparatus for carrying out the method of the present invention, Fig. 2 is a plan view illustrating the order of pressing loads, and Fig. 3 is a partially cutaway view of the apparatus of the present invention. FIG. 1°... Intermediate film l... Laminated glass 2... Degassing type 7... Partition wall 6... Injection hole 8... Pressure chamber

Claims (2)

[Claims] (1) When manufacturing a laminate by interposing a thermoplastic intermediate resin film between a pair of glass plates, the periphery of the laminate is suctioned, and the laminate is sequentially pressed outward from the center of the surface to increase the pressure. A method for bonding laminated glass, characterized by: (2) A pair of degassing molds that abut and sandwich a laminate with a thermoplastic intermediate resin film interposed between a pair of glass plates are equipped with a number of pressure chambers made of elastic material and equipped with pressure injection nozzles and partition walls. A bonding device for laminated glass, characterized in that an exhaust hole communicating with the periphery of the laminate is provided near the outer periphery of the pressure chambers that gather together.