JPS63283917A - Manufacture of window glass with molding and mold for that purpose - Google Patents

Abstract

PURPOSE:To prevent a metal strip from falling out from a molding, by a method wherein the metal strip is held strongly by either a movable mold or a stationary mold, and the metal strip is caused to encroach upon a main body of the molding by forming a horizontal projection piece on the metal strip. CONSTITUTION:A groove 11 constituted of a pair of protrusions 10, 10 separated from each other is produced on an inner wall surface of a stationary mold 2, on which cavity 6 is produced. On the one hand, an almost horizontal projection piece 12 is formed in an inward direction from one of a pair of leg pieces facing to each other of a metal strip 8'. A hollow 9' receiving a connecting piece connecting the facing leg pieces of the metal strip 8' is formed on a movable mold 3 further. Then the projection piece 12 of the metal strip 8' is inserted into the groove 11 produced of the protrusion 10, 10 of the stationary mold 2 and the metal strip 8' is held strongly by the stationary mold 2. The movable mold 3 is put upon the stationary mold 2 by placing window glass between them, at the same time the connecting piece of the metal strip 8' is put into the hollow 9' of the movable mold 3 and the metal strip 8' is pressed into the groove 11. Then resin is injected within the cavity 6 at high pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a window glass for an automobile, and more particularly to a method for manufacturing a window glass with a molding, in which a bright molding is integrally formed on the window glass, and a mold therefor.

A typical example of a conventional method for manufacturing a window glass with a molding and a mold therefor is disclosed in Japanese Patent Application Laid-Open No. 57-1737, which consists of a fixed mold 2 and a movable mold 3, and their first parting part 4. ．．
4', the window glass 5 is clamped. A cavity 6 is formed on the outer side of the mold 2.3 and has a second parting part 7.7' facing the outer part, and a bright metal strip 8 is inserted into this parting part 7.7'. 7', and resin is injected into the cavity 6 under high pressure. Generally, the metal strip 8 is formed into a substantially channel-shaped cross section.
The opposing leg pieces bite into the resin molding to prevent the metal strip 8 from coming off from the molding.

Problems to be Solved by the Invention In the conventional example shown in FIG. 9, the metal strip 8 does not take the correct position with respect to the molding after molding. The user may experience the resin turning around or the metal strip 8 tilting.

Since resin is injected into the cavity 6 at high pressure, the legs of the metal strip 8 receive this high pressure and the parting portion 7.
It is believed that the movement relative to the metal strip 7' causes the above-mentioned problems, and several improvements in the cross-sectional shape of the metal strip 8 have been proposed. However, the inventor has succeeded in solving this problem by improving the support of the metal strip to the mold.

Means for Solving the Problems The present invention employs the following technical means to overcome the drawbacks of the prior art described above.

According to the present invention, a metal strip having a substantially reverse channel cross section is fitted into the inner wall surface of the cavity of the movable mold in a wedge shape, a window glass is sandwiched between the movable mold and the fixed mold, and resin is poured into the cavity. A method of manufacturing a molded window glass comprising injection is provided.

Further, according to the present invention, sideways protrusions are formed in at least two locations on one of the opposing leg pieces of the metal strip having a substantially reverse channel-shaped cross section, and a groove for receiving the protrusions is formed in the fixed mold. Provided is a method for manufacturing a window glass with a molding, which comprises: providing a mold, fitting the projecting piece into the groove, and sandwiching the window glass between the two molds while pushing the top wall of the metal strip into the recess provided in the movable mold. be done.

Furthermore, according to the present invention, there is provided a fixed mold having a parting part for receiving the window glass and a groove for supporting at least a part of the metal strip, a parting part for pressing the window glass, and a recess into which the metal strip is pushed. Provided is a mold for manufacturing window glass with a molding, which comprises a movable mold having a movable mold.

Embodiment Embodiments of the present invention are shown in FIGS. 1-8. The same parts as in FIG. 9 are denoted by the same reference numerals, and some explanations thereof will be omitted.

In the example shown in FIG. 1, a tapered recess 9 is made in the inner wall surface of the cavity 6 of the movable mold 3, and a connecting piece of the metal strip 8 having a substantially channel-shaped cross section is pushed into the recess 9. supports the metal strip 8 in advance, and the parting part 4' of the movable mold 3 and the fixed mold 2
The window glass 5 is sandwiched between the parting part 4 and the resin is injected into the cavity 6 under high pressure.

In another example shown in FIGS. 2-4, a groove 11 consisting of a pair of spaced projections 10.10 is formed in the inner wall surface forming the cavity 6 of the fixed mold 2. On the other hand, a substantially horizontal projecting piece 12 is formed inwardly from one of the pair of opposing leg pieces of the metal strip 8'. Furthermore, the movable mold 3 is formed with a recess 9' for receiving a connecting piece joining the opposing leg pieces of the metal strip 8'. This recess 9' only needs to receive the connecting piece that forms the top wall of the metal strip 8', and it is not necessarily necessary to strongly support the metal strip 8'.As shown in FIG. In this example, the protrusions 12 of the metal strip 8' are inserted in advance into the grooves 11 formed by the protrusions 10.1 and O of the fixed mold 2, and the metal strips 10. The strip 8' is strongly supported by the fixed mold 2. The movable type 3 is connected to the fixed type 2 with the window glass 5 in between.
At the same time, put the connecting piece of the metal strip 8' into the recess 9' of the movable mold 3, and insert the metal strip 8' into the groove 1.
Press it down to 1. Next, resin is injected into the cavity 6 under high pressure.

The example shown in Figure 5-8 is the protrusion 1 of the example shown in Figure 2-4.
This is simply a change in the direction of 2. That is, in this example, the projecting piece 12' provided on the leg piece of the metal strip 8'
extends outward from the main body of the metal strip 8',
This protruding piece 12' is strongly supported by the groove 11 made up of the protrusions 10, 10 of the fixed mold 2. Since it is substantially the same as the example shown in Fig. 2-4, the same parts are given the same reference numerals. , the explanation thereof will be omitted.

Effects In the present invention, since the metal strip is strongly supported by either a movable mold or a fixed mold before mold matching, there is no movement of the metal strip during mold matching.

Further, in the case of using a horizontal protruding piece, this protruding piece bites into the molding main body and reliably prevents the metal strip from coming off from the molding.

[Brief explanation of the drawing]

FIG. 1 is a partial side sectional view of one example of the present invention, FIG. 2 is a side sectional view of another example, FIG. A cross-sectional view taken from arrow IV-IV in the figure,
Fig. 5 is a side sectional view of another example in which the direction of the protrusion is changed, Fig. 6 is another sectional view of the part shown in Fig. 5, and Fig. 7 is seen from the arrow direction ■-■ in Fig. 6. The cross-sectional view and FIG. 8 are views taken from the direction of the arrows ■--■ in FIG. 7. No. 90 is the Kanto fIgt prayer cup diagram. In the 3° diagram: 1--mold, 2-- fixed type, 3- movable type,
5- Window glass, 6--cavity, 8.8'
-Metal strip, 9.9'--indentation, io-protrusion, 11--groove, 12.12'--protrusion piece. Agent Patent Attorney Hideaki Kuwahara Figure 4
Figure 8 Figure 9

Claims (3)

[Claims] (1) Fitting a wedge-shaped metal strip with a substantially reverse channel cross section on the inner wall surface of the cavity of the movable type, sandwiching a window glass between the movable type and the fixed type, and injecting resin into the cavity. A manufacturing method for window glass with moldings. (2) A sideways protrusion is formed in at least one place on one of the opposing legs of the metal strip having a substantially reverse channel-shaped cross section, and a groove for receiving the protrusion is provided in the fixed mold, and the protrusion is A method for manufacturing a window glass with a molding, which comprises fitting a piece into the groove, and sandwiching the window glass between both molds while pushing the top wall of the metal strip into a recess provided in a movable mold. (3) A fixed type having a parting part that receives the window glass and a groove that supports at least a part of the metal strip, and a movable type that has a parting part that holds the window glass and a recess into which the metal strip is pushed. Mold for manufacturing window glass with molding.