JPH0611506B2 - Molding method for automobile window ether strip - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for integrally molding a molding and a weather strip on a peripheral portion of a window glass by using the glass and the molding as inserts.

2. Description of the Related Art For example, it has been conventionally practiced to integrally form a molding and a weather strip integrally on a peripheral portion of a rear quarter glass (hereinafter referred to as a wind glass) of an automobile (for example, Japanese Patent Laid-Open No. 57-1737). Gazette).

FIG. 4 and FIG. 5 show an example thereof, in which the fixed mold 1 and the movable mold 2 hold the window glass 3 so that the peripheral edge of the window glass faces the product part space (cavity) R, A resin molding 4 is positioned between the window glass 3 and the mold surface 2a. Then, by injecting a weather strip material from the gate portion 5 into the product space R, the molding 4 and the weather strip 6 are integrally joined and molded to the peripheral portion of the window glass 3 with the window glass 3 and the molding 4 as inserts. It will be.

Problems to be Solved by the Invention In the conventional molding method as described above, the seal contact portion 7 protruding from the back surface of the molding 4 presses the window glass 3 to position the molding 4 itself. But
The contact pressure of the seal contact portion 7 may vary due to the variation in dimensional accuracy of the molding 4, and the seal contact portion 7 may not contact with the uniform pressure throughout the entire circumference of the window glass 3. Therefore, at the time of injecting the weather strip material, the material is extruded from the gap between the seal contact portion 7 and the window glass 3 where the contact pressure is weak, and burrs occur.

The occurrence of such burrs can be eliminated to some extent by increasing the contact pressure of the seal contact portion 7 against the window glass 3, but increasing the contact pressure increases the clamping force between the fixed mold 1 and the movable mold 2. This means that the wind glass 3 is easily damaged, which is not preferable.

Means for Solving the Problems The present invention is intended to prevent the occurrence of the above flash without causing damage to the windshield.

Specifically, as shown in the embodiment, apart from the seal contact portion, a lip extending toward the edge of the windshield and pressed against the windshield is integrally projected along the entire circumference of the back surface of the molding. It is formed to suppress the injection pressure acting on the seal contact portion side when the weather strip material is injected.

Embodiment FIG. 1 and FIG. 2 are views showing an embodiment of the present invention, and the portions common to FIG. 4 and FIG.

As shown in FIGS. 1 and 2, apart from the seal contact portion 7, the windshield 3 is provided around the entire back surface of the molding 4.
A thin and elastic minute lip 8 that extends toward the edge 3a side of the window glass 3 while being pressed against is integrally formed to project. The lip 8 is formed long enough to protrude beyond the seal contact portion 7 in the molding 4 unit state shown in FIG. 2, and when it is pressed against the window glass 3 as shown in FIG. The window glass 3 has a shape that can be easily deformed so as not to generate a repulsive force that applies a bending stress.

When the weather strip material is injected, although the lip 8 is pressed against the wind glass 3 as described above, the lip 8 receives the injection pressure of the weather strip material.
Locally deforms and rises from the windshield 3,
The weather strip material wraps around the seal contact portion 7 side beyond the lip 8.

At this time, the flow path of the weather strip material is the lip 8
Since the weather strip material passes through the lip 8, its pressure is reduced, and finally the injection pressure acting on the seal abutting portion 7 side is reduced. Therefore, the weather strip material does not overflow as a flash from the seal contact portion 7.

Further, the window glass 3 integrated with the molding 4 and the weather strip 6 by the above-mentioned joining molding method is set in the window glass opening on the vehicle body panel 9 side through the sealant 10 as shown in FIG. The tip of the seal lip 11 of the weather strip 6 is assembled so as to come into pressure contact with the corner portion 12 of the vehicle body panel 9.

Due to the pressure contact of the seal lip 11 described above, a force F that pushes up the molding 4 by the entire weather strip 6 is generated, but the bent lip 8 is engaged with the weather strip 6 as it is during molding. hand,
Due to the so-called anchor effect, it works against the above-mentioned push-up force F, whereby the effect of preventing the molding 4 from coming off from the weather strip 6 is exerted.

Further, the lip 8 is not a simple projection but has a deformed or bent shape extending to the side of the end edge 3a of the window glass 3 as shown in FIG. 3, so that the surface area is enlarged. Therefore, the adhesive strength of the molding 4 to the weather strip 6 becomes necessary and sufficient.

Effects of the Invention As described above, according to the present invention, the entire circumference of the back surface of the molding,
Separately from the seal contact portion, a lip that extends toward the edge of the wind glass and comes into pressure contact with the wind glass is integrally formed to project so that the injection pressure acting on the seal contact portion side when the weather strip material is injected. As a result, the occurrence of burrs from the seal contact portion can be prevented without causing damage to the windshield.

Further, since the lip of the molding is joined and integrated with the weather strip while extending to the edge side of the wind glass, the lip has an effect of preventing the molding from coming off, and as the surface area of the lip increases, The adhesive strength between the weather strip and the molding is improved, and the bonding strength between the two is further improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
FIG. 3 is an enlarged view of part A in FIG. 3, FIG. 3 is a cross-sectional view of the attached state of the wind glass obtained by the molding method of FIG. 1, FIG. 4 is an explanatory view of the wind glass, and FIG. 5 is a conventional molding method. FIG. 5 is a sectional view corresponding to the line VV in FIG. 4 in the figure. 1 ... Fixed type, 2 ... Movable type, 3 ... Wind glass,
3a ... edge, 4 ... mall, 6 ... weather strip, 7 ... seal abutment, 8 ... lip, R ... product space.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiko Kikuchi, 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Tadahiko Morigaki, 2 Takara-cho, Kanagawa, Yokohama, Nissan

Claims (1)

[Claims] 1. A molding having a window glass peripheral portion facing a product space in a mold and a seal contacting portion projectingly formed on a rear surface of the molding is positioned on the wind glass peripheral portion to form a product glass space in the product space. In a method of integrally joining and molding a molding and a weather strip to the peripheral portion of the wind glass by injecting a weather strip material, in addition to the seal contact portion on the entire circumference of the back surface of the molding,
A lip that extends toward the edge of the windshield and is in pressure contact with the windshield is integrally formed so as to suppress the injection pressure acting on the seal contact portion side when the weather strip material is injected. Molding method for automobile window ether strip.