JP2514801B2 - Window material manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a window material in which a frame body is integrally molded around a window material such as glass.

[Conventional technology]

In general, window materials for vehicles and buildings have a frame body made of rubber, soft vinyl chloride, or the like attached to the periphery of a glass plate in order to prevent wobbling during assembly or ingress of moisture.

Conventionally, these frame bodies have been manually fitted after being molded by extrusion after applying an adhesive. When it is attempted to automate this, flat glass can be easily automated, but curved glass is difficult.

Therefore, a method of manufacturing a window material in which a glass plate is inserted into a mold and a frame is molded around the periphery by injection molding (Japanese Patent Publication No. 61-
No. 7368) was developed.

[Problems to be solved by the invention]

However, since the glass, the resin, and the rubbers are essentially difficult to adhere to each other, the frame body molded as described above is easily peeled off, and there is a problem that moisture enters after assembling.

Further, in the above method, in order to prevent damage to the glass due to the mold clamping force, a buffer member made of a heat-resistant synthetic resin is provided in the holding portion of the mold, but as this material, a fluororesin, a silicone rubber or the like is usually used. , Even such a material is deformed by the mold clamping force while being in contact with a high temperature molten resin (in the case of rubber molding, a mold heated to a high temperature for vulcanization), the life is short, and Since these are expensive, there is a problem that running costs are high.

[Means for solving problems]

The present invention was conceived in order to solve the problems in the above-mentioned conventional manufacturing method, and its object is to make glass or the like even if the frame body is made of a material such as synthetic resin or rubber. To provide a new window material manufacturing method that has good adhesiveness to the window material, does not cause a gap or peeling, and can prevent the window material from being damaged when being held by a mold. It is in.

The present invention according to the above-mentioned object is a method of manufacturing a window material in which a window material such as glass is inserted into an injection molding die, and a frame is injection-molded on the peripheral edge of the window material. Before the adhesive layer hardens, the window material is put into the mold, and the upper and lower inner surfaces of the adhesive layer are partially sandwiched by the sandwiching portions projecting in the mold, and the adhesive layer outside the sandwiching portion. It is formed by injection-molding a frame on top.

 This will be described in detail with reference to examples.

〔Example〕

In the figure, 1 is a fixed type, 2 is a movable type, and on the mold closing surfaces of these molds, there are sandwiching portions 4 and 5 by the projecting edges which are located mutually with a space for accommodating the window material 3 therebetween, and the sandwiching portions 4, And the cavity recesses 6 and 7 formed on the outside of 5.

The holding portions 4 and 5 are formed to have a size that slightly deforms the adhesive layer 8 provided on the plate-shaped window member 3, and the contact surface thereof is made of Teflon to prevent the adhesion to the adhesive layer 8. It has a coating.

Reference numeral 9 is an injection-molded frame, and 10 is a material passage.
Although not shown in the drawing, the fixed die 1 and the movable die 2 are not shown.
Are mounted on a fixed platen and a movable platen of the injection molding machine as usual.

Then, first, an elastic adhesive is applied to the peripheral edge of the window member 3, and the upper and lower surfaces and side surfaces of the peripheral edge are covered with the adhesive layer 8.

Next, before the adhesive layer 8 is hardened, this window material 3 is put between the molds that have been opened, and the holding member 5 of the fixed mold 1 is so arranged that the peripheral edge thereof evenly projects into the recesses 6. Place on.

By this insert operation, the inside of the adhesive layer 8 is located in the sandwiching portion 5, so that when the movable mold 2 is moved and the mold is closed next, the window material 3 holds the sandwiching portion via the inside of the upper and lower surfaces of the adhesive layer 8. 4,5
Only the peripheral edge, which is sandwiched in the mold by and covered with the adhesive layer 8, is positioned to project into the cavity formed by the recesses 6 and 7.

When the mold is further clamped, the upper and lower inner surfaces of the adhesive layer 8 are partially pressed by the sandwiching portions 4 and 5 to be deformed into a flat shape, the window member 3 is elastically held, and the non-frame portion and the cavity are separated. Sealed.

After the mold clamping is completed, synthetic resin or rubber is injected from the material passage 10 into the cavity. By this injection, the frame body 9 is molded around the window material, and the frame body 9 is integrally bonded to the window material 3 via the adhesive layer 8.

〔The invention's effect〕

As described above, according to the present invention, the window material is put into the mold before the adhesive layer applied to the peripheral edge of the window material is hardened, and the upper and lower inner surfaces of the adhesive layer are partially sandwiched by the sandwiching portion projecting into the mold. Since the frame body is sandwiched and the frame body is injection-molded on the adhesive layer outside the sandwiched portion, the window material and the frame material are firmly adhered to each other, and when the frame body is assembled to a window of a vehicle or a building, It does not easily wobble, or even if it is used for a long period of time, it is difficult for water to enter due to peeling of the frame.

Also, because the adhesive layer holds and seals the window material during molding, it is possible to absorb wall thickness deformation, warpage, and distortion of the glass plate within the range of the adhesive layer thickness, and to securely hold and seal, as well as gold. Since the mold does not require a cushioning material, it has the features that the structure can be simplified and the cost is low.

[Brief description of drawings]

The drawings schematically show the method for manufacturing a window material according to the present invention. FIG. 1 is a sectional view when a window material is inserted, FIG. 2 is a sectional view when a frame is molded, and FIG. 3 is a sectional view of a finished product. FIG. 4 is a front view of the finished product. 1 ... Fixed type, 2 ... Movable type, 3 ... Window material, 4,5 ... Holding part, 6,7 ... Recessed part, 8 ... Adhesive layer, 9 ... Frame body.

Claims (1)

(57) [Claims] 1. A method of manufacturing a window member, wherein a window member such as glass is inserted into an injection molding die, and a frame is injection-molded on the periphery of the window frame, wherein a peripheral edge of the window member is provided with an adhesive layer in advance. Before the adhesive layer hardens, the window material is put in the mold, and the upper and lower surfaces of the adhesive layer are partially sandwiched by the sandwiching portions projecting into the mold, and on the adhesive layer outside the sandwiching portion. A method for manufacturing a window material, which comprises molding a frame by injection molding.