JP5669355B2 - Automotive weatherstrip - Google Patents

Description

  The present invention is, for example, an opening seal that is attached to a body panel of an automobile and includes a curved lip portion provided with a coating layer (color solid material made of a thermosetting or thermoplastic elastomer of a desired color) C on the outer surface. It relates to the weather strip.

  As shown in FIGS. 1 and 2, an opening seal (weather strip) 40 is attached to the door opening edge of the automobile body panel 2 in order to elastically contact the door panel and ensure sealing performance. The opening seal 40 has a substantially U-shaped mounting base portion 20 assembled to the mounting flange, a hollow seal portion 30 that is integrally formed with the mounting base portion 20 and elastically contacts the door, protrudes from the mounting base portion 20, and contacts the interior trim 4. A lip portion 10 is provided.

  In addition, as shown in FIG. 2, the opening seal 40 having such a configuration has a coating layer made of a color solid material for the purpose of design and the like on the bottom wall 21 of the mounting base 20 and the outer surface 11 of the lip portion 10 continuous therewith. A material provided with C (a solid material made of a thermosetting or thermoplastic elastomer of a desired color) is often used.

  The coating layer C made of the color solid material has a specific gravity of 0.9 to 1.3. The mounting base 20 and the lip 10 are formed of a fine foam solid material, and the specific gravity is 0.9 to 1.1. Moreover, the hollow seal part 30 is formed with the sponge material P, and the specific gravity is 0.4-0.6 normally.

  In addition, the technique which provides a solid material in the outer surface 11 of the lip | rip part 10 is described in patent document 1 and 2, for example.

In order to reduce the weight of the opening seal, the present inventors have made the mounting base portion 20 and the lip portion 10 a fine foam solid material S (specific gravity 0.9 to 1.1) or lighter and lighter. Research has been conducted for the purpose of forming the material S (specific gravity: 0.6 to 0.95). However, in particular, when the mounting base 20 and the lip 10 are made of a light, finely foamed solid material and the color solid material as the coating layer C is coextruded on the outer surface (design surface), the lip 10 is heated by the heat of the vulcanization process. As shown by the imaginary line in FIG. 2, the problem of warping downward occurs.

This is because the specific gravity of the mounting base 20 and the lip 10 is reduced to a range of 0.9 to 1.1 (finely foamed solid material S), or further to 0.6 to 0.95 (lightweight finely foamed solid material S). As a result, the specific gravity difference with the coating layer C (specific gravity 0.9 to 1.3) provided on the outer surface 11 of the lip portion 10 is larger (specific gravity 0.2 or more).

That is, in the vulcanization step, for lip 10 is fine solid material is expanded by foaming, the coating layer C of the outer surface 11 is very small even if you do not or foaming foam, lip adjacent thereto The foaming of 10 fine foam solid material will be prevented. As a result, the foamed portion swells, and the portion of the coating layer C does not swell or is insignificant even if foamed, so that the lip portion 10 is deformed to warp downward in FIG. Such a tendency remarkably appears as the specific gravity difference between the coating layer C and the lip portion 10 increases.

  The present invention was devised in view of such problems, and in an opening seal or the like in which a coating layer is provided on the outer surface 11 of the lip portion, the lip portion is not deformed due to a difference in specific gravity between the lip portion and the coating layer. It is an object to provide a weather strip for an automobile.

Referring to FIGS. 1 and 3 will be described. The weather strip 1 for an automobile according to claim 1 is a fine foam solid material S, particularly a light weight fine foam solid material S. The outer surface 11 of the lip portion 10 that contacts the interior trim 4 has, for example, a thermosetting property of a desired color. Alternatively, in the solid material made of a thermoplastic elastomer and provided with a coating layer C having a specific gravity greater than that of the lip portion 10, the coating layer is also applied to the inner surface 12 which is the surface opposite to the outer surface 11 of the lip portion 10. C partially provided, it is characterized in that to prevent the said lip 10 is deformed by vulcanized foam.

More specifically, the weather strip 1 for an automobile according to claim 1 has a substantially U-shaped cross section assembled to a flange portion 3 formed along the door opening edge of the body panel 2 and is particularly lightweight. The mounting base 20 which is a finely foamed solid material S, a hollow seal portion 30 which is integrally formed with the mounting base 20 and elastically contacts the door, and protrudes from the bottom wall 21 of the mounting base 20 and contacts the interior trim 4. A lip portion 10 that is in contact with the foamed material S, the bottom wall 21 of the mounting base 20 and the outer surface 11 of the lip portion 10 are, for example, a solid material made of a thermosetting or thermoplastic elastomer of a desired color, in a large coating layer C having a specific gravity from the mounting base 20 and the lip portion 10 that is provided by coextrusion with the mounting base 20 and the lip 10, of the mounting base 20 and the lip portion 10 There difference in specific gravity of the heavy and the coating layer C is 0.2 or more, a base end portion of the inner surface 12 of the lip 10, also part including a curved surface 13 continuous to the interior side wall 22 of the mounting base 20 The covering layer C is provided, and the covering layer C is not provided on the entire inner surface 12 , and the lip portion 10 is caused by vulcanization foaming due to the specific gravity difference between the lip portion 10 and the covering layer C of the outer surface 11 thereof. Is characterized in that it is prevented from deforming.

The automobile weather strip 1 according to claim 2 is the invention according to claim 1, wherein the specific gravity of the mounting base portion 20 and the lip portion 10 which are the fine foam solid material S is 0.6 to 1.1, and The specific gravity of the coating layer C, which is a solid material made of a curable or thermoplastic elastomer, is 0.9 to 1.3.

  In the weather strip 1 for an automobile according to the first and second aspects, as described above, the covering layer C is a base end portion of the inner surface 12 of the lip portion 10 and is curved continuously to the indoor side wall 22 of the mounting base portion 20. It is provided on the surface 13.

The automobile weather strip 1 according to claim 1 is a solid material made of a thermosetting or thermoplastic elastomer having a desired color on the outer surface 11 of the lip portion 10 which is a fine foam solid material S, and has a specific gravity higher than that of the lip portion 10. There the one provided by co-extruding a greater coating layer C 0.2 or more, even the inner surface 12 and outer surface 11 is a surface of the opposite side of the lip portion 10, is provided with the coating layer C partially vulcanized Even after foaming, the lip portion 10 is prevented from warping in one direction .

That is, the covering layer C is not provided on the entire inner surface 12 of the lip portion 10, but is a part including the curved surface 13 that is the base end portion of the inner surface 12 of the lip portion 10 and continues to the indoor side wall 22 of the mounting base portion 20. since there is provided a coating layer C, the swelling of the curved surface 13 of the base end portion of the inner surface 12 of the lip portion 10 (foaming) is suppression. Accordingly, the lip portion 10, while the inside can be reduced foaming lightweight, deformation of the lip portion 10 is prevented by the inhibition.

  The weather strip 1 for an automobile according to claim 2 exhibits the same effect as that of the invention according to claim 1.

  In the automotive weather strip 1 according to claims 1 and 2, the covering layer C is provided on the curved surface 13 which is the base end portion of the inner surface 12 of the lip portion 10 and continues to the indoor side wall 22 of the mounting base portion 20. The lip portion 10 can be effectively prevented from warping without providing the coating layer C over the entire inner surface 12.

That is, the curved surface 13 of the lip portion 10 is a portion that is deformed by receiving the greatest stress when the lip portion 10 warps downward. Therefore, by suppressing the deformation of the curved surface 13, the entire lip portion 10 is deformed. Can be effectively prevented. Thus, the coating layer, in particular reducing the amount of colored color solid material C (expensive), an improvement in productivity can and FIG Turkey.

It is a side view which shows the motor vehicle provided with the weather strip. FIG. 2 is a sectional view taken along line XX of FIG. 1, showing a weather strip according to a conventional example. The weather strip which concerns on 1st embodiment of this invention is shown, and it is the XX sectional drawing of FIG. The weather strip which concerns on 2nd embodiment of this invention is shown, and it is the XX sectional drawing of FIG.

The implementation form of an automotive weather strip 1 according to the present invention, shown in FIGS. The weather strip 1 has a substantially U-shaped cross section assembled to the flange portion 3 formed along the door opening edge of the body panel 2, has a mounting lip 23, and has a mounting base portion 20 in which a core member 24 is embedded, The opening seal includes a hollow seal portion 30 that is integrally formed with the mounting base portion 20 and elastically contacts the door, and a lip portion 10 that protrudes from the bottom wall 21 of the mounting base portion 20 and abuts against the interior trim 4.

On the bottom wall 21 of the mounting base portion 20 of the opening seal 1 and the outer surface 11 of the lip portion 10, a coating layer C made of a thermosetting or thermoplastic elastomer solid material of a desired color is continuously applied to the mounting base portion 20 and the lip portion. Coextruded with the part 10 is provided. The mounting base portion 20 and the lip portion 10 are formed of a fine foam solid material S having a specific gravity of 0.6 to 1.1. The specific gravity of the coating layer C is 1.1 to 1.3, which is about 0.2 higher than the fine foam solid material S. The hollow seal portion 30 is formed of sponge rubber (specific gravity 0.4 to 0.8). The covering layer C is also provided on the curved surface 13 that is the base end portion of the inner surface 12 of the lip portion 10 and continues to the indoor side wall 22 of the mounting base portion 20.

In this weather strip 1, the coating layer C is also provided on the curved surface 13 of the inner surface 12 of the lip portion 10, so that the weather strip 1 contacts the coating layer C of the outer surface 11 and the inner surface 12 of the lip portion 10 (fine foamed solid material S). The bulge of the contacted portion is similarly suppressed. Therefore, although the inside of the lip part 10 foams, the situation where it deform | transforms so that it may warp downward is prevented.

  Moreover, since the coating layer C is provided on the curved surface 13, it is possible to effectively prevent the lip portion 10 from warping without being provided on the entire inner surface 12. The curved surface 13 of the lip portion 10 is a portion that is deformed by receiving the greatest stress when the lip portion 10 warps outward, and the entire deformation of the lip portion 10 is suppressed by suppressing the deformation of the curved surface 13. Is effectively prevented. Thereby, the usage-amount of the coating layer C can be reduced and productivity can be improved.

A reference form is shown in FIG. The weather strip 1 is characterized in that the coating layer C is provided on the entire inner surface 12 of the lip portion 10. That is, the coating layer C is continuously provided over the entire area from the bottom wall 21 of the mounting base 20 to the curved surface 13 of the lip 10 to prevent the lip 10 from warping.

DESCRIPTION OF SYMBOLS 1 Weather strip 2 Body panel 3 Flange part 4 Interior trim 10 Lip part 11 Outer surface 12 Inner surface 13 Curved surface 20 Mounting base 21 Bottom wall 22 Indoor side wall 23 Mounting lip 24 Core material 30 Hollow seal part 40 Weather strip C Covering layer S Fine foaming Solid material P Sponge material

JP 2008-132858 A JP 2008-132859 A

Claims (2)

A mounting base (20), which is a substantially foamed solid material (S), is attached to the flange (3) formed along the door opening edge of the body panel (2), and is attached to the mounting base. A hollow seal portion (30) that is integrally formed and elastically contacts the door, and a lip portion (10) that is a fine foam solid material that protrudes from the bottom wall (21) of the mounting base and abuts against the interior trim (4). provided, on the outer surface (11) of the lip portion and the bottom wall of the mounting base is made of thermosetting or thermoplastic elastomer, the mounting base and a large coating layer specific gravity than the lip portion (C) of the mounting base ( 20) and an automotive weatherstrip co-extruded with the lip (10) ,
The difference between the specific gravity of the mounting base (20) and the lip (10) and the specific gravity of the coating layer (C) is 0.2 or more,
A base end portion of the inner surface (12) of the front Symbol lip, the coating layer in part comprising curved surface continuous with the chamber inner wall (22) and (13) of the mounting base (20) and (C) is provided, Without providing the coating layer (C) on the entire inner surface (12), the vulcanization foaming caused the difference in specific gravity between the lip portion (10) and the coating layer (C) of the outer surface (11). A weather strip for automobiles, wherein the lip portion is prevented from being deformed.   Specific gravity of the coating layer (C) made of thermosetting or thermoplastic elastomer, wherein the specific gravity of the mounting base part (20) and the lip part (10) which are the fine foam solid material (S) is 0.6 to 1.1. The weather strip for automobiles according to claim 1, wherein is 0.9 to 1.3.

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