JPH0524055A - Automotive weatherstrip - Google Patents

Abstract

PURPOSE:To securely close a slit for releasing a core of a force molding section for an automotive weatherstrip with good appearance and sufficient bonding strength. CONSTITUTION:A trimming section 4 and a hollow seal section 5 are formed on a force molding section 3 connected with an extruded body. A slit 6 for releasing a core is formed on the hollow seal section 5, and a cover piece 8 for covering the slit 6 for core releasing from outside is formed integrally. A core 17 used for force molding is released from the slit 6, and then the cover piece 8 is folded to the side of the trimming section 4 and polymer bonded on the outer face of the hollow seal section 5. The slit 6 for core releasing is covered with the cover piece 8 and closed firmly in a wide bonded area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip formed by connecting a molding part to an extruded body, and more particularly to a technique for closing a core removal slit of the molding part.

[0002]

2. Description of the Related Art For example, as shown in FIG. 4, a weather strip 1 attached to a door opening of an automobile is constructed by connecting an extruded body 2 by a molding portion 3 at a corner portion. As shown in FIGS. 5 and 6, the extruded body 2 and the mold forming portion 3 are integrally formed with a trim portion 4 attached to the body B and a hollow seal portion 5, which are formed with substantially the same cross-sectional shape. . A core removal slit 6 is formed in the hollow seal portion 5 of the molding portion 3, and the core (core) used at the time of molding is taken out from this slit. After the core is taken out, the core removing slit 6 is closed in order to prevent air escape noise and opening of the door when the door is closed, but conventionally, as shown in FIG. It was adhered with adhesive 7 and closed.

[0003]

However, according to the conventional weather strip, since the inner surface of the core-removing slit 6 is adhered, the slit mark remains and the appearance is poor.
Further, since the adhesion area is small, there are problems that the periphery of the adhesion part is deformed into an uneven shape, sufficient adhesion strength cannot be obtained, and the adhesion part opens due to the impact when the door is closed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a weather strip for an automobile, which is capable of providing a good appearance of a core-removing slit and securely closing it with sufficient adhesive strength.

[0005]

In order to solve the above-mentioned problems, the weather strip for automobiles of the present invention has a hollow seal portion formed in a molding portion connected to an extruded body, and the hollow seal portion is formed in the hollow seal portion. The core removal slit is provided, a covering piece for covering the core removal slit from the outside is integrally formed, and the covering piece is polymer-bonded to the outer surface of the hollow seal portion to close the core removal slit.

Examples of the "automobile weatherstrip" include various weatherstrips mounted on the opening and closing parts of an automobile such as a door opening, a door panel, an engine hood or a trunk. The “extruded body” is
An attachment base portion (trim portion) attached to a body or a door panel and a hollow portion that seals the opening / closing portion are integrally extruded. Examples of the "molded portion" include one that connects the abutting ends of adjacent extruded bodies at a bent portion such as a corner, or one that is molded by connecting to the end of the extruded body. In the case of the molding part connected between the extruded bodies, the attachment base part having substantially the same sectional shape as that of the extruded body and the "hollow seal part" are integrally provided therein.

The "core removal slit" is for taking out the core used for molding the hollow seal portion, and is formed in the longitudinal direction of the molding portion. The “covering piece” may be, for example, one having a larger area than the core cutting slit and integrally formed so as to project outward from one edge of the core cutting slit. When the covering piece is polymer-bonded to the outer surface of the hollow seal portion, it is preferable that the covering piece is formed thinner toward the tip side so that no step appears in the bonding portion. Further, in the case of the mold forming part having the trim part, if the covering piece is polymer-bonded to the hollow seal part on the trim part side, the bonded part becomes difficult to be seen from the outside.

[0008]

According to the weather strip of the present invention, since the core removing slit is covered with the covering piece and is bonded to the outer surface of the hollow seal portion in an overlapping manner, the bonding area can be increased.
Sufficient adhesive strength is obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a weather strip mounted on a door opening of an automobile will be described below with reference to the drawings. As shown in FIG. 4, the weather strip 1 of this embodiment is configured by connecting adjacent extruded bodies 2 at a corner portion of a door opening by a molding portion 3. As shown in FIGS. 2 and 3, the extruded body 2 and the die-molded portion 3 are co-extruded with a sponge rubber material and a solid rubber material, respectively, and molded with substantially the same cross-sectional shape by a solid rubber material, and attached to the body B. The trim part 4 and the hollow seal part 5 are integrally provided. The hollow seal portion 5 of the molding portion 3 has a core removing slit 6 in the longitudinal direction thereof.
Is provided, and a covering piece 8 that covers the core removing slit 6 from the outside is integrally formed.

As shown in FIG. 1, the covering piece 8 is provided so as to project outward from the upper edge of the core extracting slit 6, and a step portion 9 is provided at the base portion thereof. Further, the covering piece 8 has a larger area than the core extracting slit 6, and is formed thinner toward the tip side. A recess 10 having the same size as that of the covering piece 8 is provided on the outer side of the hollow seal portion 5 on the lower side of the core removing slit 6, that is, on the trim portion 4 side, and as shown in FIG. The core removing slit 6 is closed by polymerizing 8 and adhering them with the adhesive 7. In FIG. 2, 11 is a reinforcing insert embedded in the trim portion 4 of the extruded body 2.

When manufacturing the weather strip 1 constructed as described above, the extruded body 2 is cut into a predetermined length after extrusion molding, and its end portion is inside the molding apparatus 13 as shown in FIG. Is set to. The mold forming device 13 includes an upper mold 14,
It is composed of a lower mold 15, a plurality of middle plates 16, and a core 17 for molding the hollow seal portion 5. Then, the molding material is injected into the mold molding device 13 to mold the mold molding portion 3 between the butt ends of the extruded body 2, and the hollow seal portion 5 has the core removing slit 6, the covering piece 8, The step 9 and the recess 10 are formed.

After molding, the upper mold 14, the lower mold 15, and the middle plate 16
Are sequentially released, and then the core 17 is provided with the core removing slit 6
Is opened and taken out. Next, the adhesive 7 is applied to the covering piece 8, the step portion 9, and the recess 10, and the covering piece 8 is bent toward the trim portion 4 side and polymerized and adhered to the recess 10 as shown in FIG. The core removal slit 6 is closed. In this case, since the step portion 9 is provided at the base portion of the covering piece 8, the covering piece 8 can be easily and accurately adhered to the concave portion 10 accordingly.

As described above, according to the weather strip 1 of the present embodiment, since the core removing slit 6 is covered with the covering piece 8, the slit mark can be concealed. Since the covering piece 8 is formed thinner toward the front end side, there is no possibility that a step will appear in the adhesive portion. Since the covering piece 8 is bent and adhered to the trim portion 4 side, the adhered portion is less visible from the outside. Therefore, the core removing slit 6 can be closed nicely. Further, since the covering piece 8 is adhered to the outer surface of the hollow seal portion 5 in an overlapped manner, the adhesion area can be increased, sufficient adhesive strength can be obtained, the mouth opening can be reliably prevented, and the periphery of the adhesion portion is deformed. There is no fear.

The present invention is not limited to the above embodiment, but can be modified and implemented as follows. (1) Providing a core removal slit and a covering piece in a hollow seal portion at a position different from that of the above embodiment. (2) Forming the inner surface of the covering piece and the outer surface of the hollow seal portion that is polymerized into a corrugated shape. (3) Applying the present invention to a molding part connected to the end of the extruded body. (4) Applying the present invention to a weather strip mounted on a door panel, an engine hood, a trunk or the like.

[0015]

As described in detail above, according to the present invention,
Since the covering piece covering the core removal slit is polymer-bonded to the outer surface of the hollow seal portion, the core removal slit has an excellent effect that it can be surely closed with good appearance and sufficient adhesive strength.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state where a die molding portion of a weather strip according to an embodiment of the present invention is being molded.

FIG. 2 is a perspective view of a main part of a weather strip including the mold forming part of FIG.

FIG. 3 is a cross-sectional view of a mold forming part showing a state in which a core extracting slit of FIG. 1 is closed.

FIG. 4 is a side view of the automobile showing a mounting portion of a weather strip.

FIG. 5 is a perspective view of a main part of a conventional weather strip.

FIG. 6 is a cross-sectional view of a mold forming part showing a conventional method for closing a core extracting slit.

[Explanation of symbols]

1 Weather Strip 2 Extruded Body 3 Molded Part 4 Trim Part 5 Hollow Seal Part 6 Core Slit 7 Adhesive 8 Coated Piece

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Claims (1)

Claim: What is claimed is: 1. A cover piece for forming a hollow seal portion in a molding portion connected to an extruded body, providing a hollow core slit in the hollow seal portion, and covering the core hollow slit from the outside. Is integrally formed, and the coated piece is polymer-bonded to the outer surface of the hollow seal portion to close the core removing slit.