JPH04118324A - Weather strip for automobile - Google Patents

Abstract

PURPOSE:To improve the outside appearance of a connection part by forming the seal lip of the connection part from an extended seal lip as extrusion molded body and suppressing the mold shaped connection part between the seal lip in a small range. CONSTITUTION:Only a seal lip 33b is extended in the longitudinal direction from one between the extrusion molded members 3A and 3B having different extrusion angle of the seal lip, e.g. from the terminal edge of the extrusion molded member 3B, and an extended seal lip 34b is formed. Further, the extension angle of the extended seal lip 34b is deformed toward the extension end so as to coincide with the extension angle of the seal lip 33a of the other extrusion molded member 3A. Further, the extension end is set oppositely in a close interval to the terminal of the seal lip 33a of the other extrusion molded member 3A. The body parts 30a and 30b of both the extrusion molded members 3A and 3B and sealing lips 33a and 33b are connected through mold shaping, and a connection part 3C is formed. Accordingly, the seel lip in the connection part 3C is inconspicuous, and outside appearance is improved, since the mold shaped connection part 31c is formed in a small range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a weather strip that is attached around the door of an automobile.

[Prior Art] Taking the rear door IA of an automobile as shown in FIG. 4 as an example, a weather strip is attached to the door frame 2 along the rear door IA. As shown in FIG. 5, this weather strip 3 includes a mounting base 31 that is held by a retainer in a concave groove formed on the outer periphery of the door frame 2, and a hollow seal portion 32 that is pressed against the door opening edge of the automobile body. ,
It is provided with a seal lip 33 that comes into contact with a concave drip rail provided outside the door opening edge.

Weatherstrip 3 is extruded. however,
The corner part (part A in Figure 4) needs to be curved into a corner shape, and the shape of the main body part 30 including the mounting base 31 and hollow seal part 32 is slightly different on the roof side 4 side and quarter pillar 5 side. Also, the seal lip 33 is different.
Since the shapes of the drip rails on the roof side 4 side and the quarter pillar 5 side are different, the extension angles with respect to the main body part 30 are different. It is formed by connecting the extruded material 3B on the 5 side by molding. FIG. 6 shows a cross section of the molded connection part 3C, and the cross-sectional shape changes gradually from the extruded material 3A side to the 3B side as a whole. Note that 36 and 37 are punch holes of the core used during molding.

[Problems to be Solved by the Present Invention] By the way, the color tones of the surface skins of extruded rubber materials and molded materials are quite different. However, the seal lip 33 is visible on the outside, and the difference in color tone gives a sense of discomfort to the corner portions and spoils the appearance. The present invention has been made with the object of improving the appearance of the connecting portion by reducing the size of the molded connecting portion that appears on the outside as much as possible.

[Means for Solving the Problems] Therefore, the present invention, as illustrated in FIGS. 1 and 2,
Extruded molded materials 3A with different extension angles of seal lips,
3B, for example, from the end of the extrusion molded material 3B, only the seal lip 33b is extended in the longitudinal direction to form an extended seal lip 34b, and the extension angle of this extended seal lip 34b is set to be the same as the seal lip of the other extrusion molded material 3A. 33a
The seal lip 33 of the other extruded material 3A is gradually changed toward the extending end so as to match the extending angle of the extending end.
Opposed to the end of a at a close distance, the molded material 3A for double pressing
, 3B and the seal lips 33a, 34b are connected by molding to form a connecting portion 3C.

[Operations and Effects] Most of the sealing lip of the connection part is formed by the extension sealing lip 34b which is an extrusion molded product, and the molded connection part 31C between it and the sealing lip 33a is in a very small range. The appearance is improved without being noticeable.

[Example] Embodiments of the present invention are shown in FIGS. 1 to 3.

The extruded materials 3A and 3B of the weather strip 3 are connected by a molded connection portion 3C.

The extruded material 3A is attached to the upper horizontal part of the door frame 2 facing the roof side 4 in the automobile shown in FIG. 4, and is made of sponge rubber.
1a, a hollow seal portion 32a, and a seal lip 33a.

The extruded material 3B is attached to the rear inclined portion of the door frame 2 facing the quarter pillar 5, is made of sponge rubber, and includes a mounting base 31b, a hollow seal portion 32b, and a seal lip 33b. Hollow seal part 32
b has a slightly flatter shape than the hollow seal portion 32a. The seal lips 33a, 33b extend from the mounting bases 31a, 31b at different angles.

The structure of the molded connection portion 3C will be explained together with its molding method.

The entire end of the extruded material 3A is a cut surface. The extruded material 3B has a seal lip 33 as shown in FIG.
b is cut at the main body portion 30b consisting of the mounting base portion 31b and the hollow seal portion 32b, leaving an extended seal lip 34b extending in the longitudinal direction.

These extruded materials 3A and 3B are set in the cavity of the mold, facing each other at a predetermined angle. in this case,
The extended seal lip 34b is curved to follow the corner shape, and is gradually twisted so that its extending tip matches the extending angle of the seal lip 33a of the extruded material 3A, and the tip is bent into the seal lip 33a. They are set in the mold in close opposing positions. In this state, a sponge rubber material is injected into the cavity. As a result, the main body portion 30a of the extrusion molded material 3A and the main body portion 30b of the extrusion molded material 3B are connected, and the seal lip 33a and the extended seal lip 34b are connected. The extended seal lip 34b is curved into a corner shape depending on the mold temperature, and is bent into a shape that gradually changes to match the extension angle of the seal lip 33a.

Thus, the molded connection portion 3C of the obtained weatherstrip 3 has a seal lip 33a and an extended seal lip 34b.
Only the part 31c between 31c and the mounting base side part 32c appear on the outside of the vehicle, but since the side part 32c is almost hidden by the retainer that holds the weather strip 3, the part 31c
only appears on the outside. However, since the width of the portion 31c is narrow, it is hardly noticeable, and a sense of continuity can be obtained at the corner portion, resulting in a good appearance.

The present invention is not limited to the above-mentioned embodiment, but can also be applied to a molded connection part of a corner part B of a weather strip used for a front door IB of an automobile shown in FIG. 4, for example.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a perspective view of the connection part of the weather strip, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. FIG. 4 is a perspective view of an automobile; FIG. 5 is a perspective view of a connecting portion of a conventional weather strip;
FIG. 6 is a sectional view taken along the line Vl-VI in FIG. 5. IA, IB...Door 2...Door frame 3...Weather strip 3A, 3B...Extruded material 3C...Mold connection Parts 30.30a, 30b... Main body part 33.33a
, 33b... Seal lip 34b...
Extension seal lip Fig. 1, It) Fig. 5 Fig. 6

Claims (1)

[Claims] An automotive weather strip comprising a main body and a seal lip formed along the main body, in which extruded materials whose seal lips extend from the main body in different directions are connected by molding. In the strip, only the seal lip of one extruded material extends in the longitudinal direction from the end of the extruded material to form an extended seal lip, and the extension angle of the extended seal lip is determined by the extension angle of the seal lip of the other extruded material. The extending end of the extended seal lip is made to face the end of the seal lip of the other extrusion molded material at a close distance by gradually changing it to match the extension angle, and the distance between the main body parts and the seal lip of both extrusion molded materials is Automotive weather strip that is connected by molding.