Opening Trim Weather Strip
An opening trim weather strip includes a trim portion
, a seal portion, and a cover lip integrally formed to the trim portion and extended to a vehicle interior side thereof. The cover lip is formed with a cover lip main body by a sponge member and formed with a cover lip skin layer formed by a solid member at a surface of the cover lip main body. A modulus of the cover lip skin layer is made to be equal to or smaller than a modulus of the cover lip main body.The present invention relates to an opening trim weather strip attached to a vehicle body opening peripheral part of a vehicle body of an automobile for sealing a gap between the vehicle body opening peripheral part and an automobile door,particularly relates to an opening trim weather strip which is provided with a cover lip and in which at least a main body of the cover lip is formed by a sponge member.
An opening trim weather strip 110 attached to a vehicle body opening peripheral part of a vehicle body of an automobile is molded by extrusion and is constituted by a trim portion 120, a cover lip 130 and a hollow seal portion 140 as shown byFIG. 5.
The trim portion 120 holds the opening trim weather strip 110 over an entire periphery of a vehicle body opening by clamping a flange portion formed at a vehicle body opening peripheral part 6. The trim portion 120 is formed by a solid member ora slightly foamed member, inside thereof is embedded with an insert member 126, an inner face thereof is formed with a vehicle exterior side hold lip 124 and a vehicle interior side hold lip 125 for holding the flange portion to thereby hold the flangeportion of the vehicle body.
The hollow seal portion 140 is formed integrally with a vehicle exterior side of the trim portion 120 for sealing a gap between a door 2 and the vehicle body opening peripheral part 6 by being brought into contact with an outer periphery of thedoor 2 when the door 2 is closed. The hollow seal portion 140 is formed with a sponge member to be flexibly brought into contact with the door 2 in accordance with a shape thereof to firmly seal.
The cover lip 130 is extended in a vehicle interior direction from a portion on a vehicle interior side of the trim portion 120, brought into contact with a garnish or the like provided at inside of a vehicle to thereby cover a gap between theopening trim weather strip 110 and the garnish or the vehicle body. The cover lip 130 is formed by a solid member, or a slightly foamed member similar to the trim portion 120, further, a surface of the cover lip 130 is provided with a skin layer 133made of a thermoplastic elastomer of a solid member for garnishment (refer to, for example, JP-A-8-174620, JP-A-2001-130264 and JP-A-2001-246991).
In recent years, light-weight formation of an automobile has been requested for protecting a global environment and it is also requested to light-weight the opening trim weather strip 110 for the light-weight formation of an automobile. Aspecific weight of the solid member for forming the trim portion 120 and the cover lip 130 is about 1.2, a specific weight of the slightly foamed member is about 0.95 through 1.05, and therefore, it is requested to constitute the specific weight by about0.5 through 0.8 by the sponge member by further foaming.
However, the opening trim weather strip 110 is attached to an entire periphery of the vehicle body opening peripheral part 6 of an automobile to be along therewith, and therefore, the opening trim weather strip 110 is bent to be attached theretoat a corner portion. At that occasion, in a case of forming the main body of the cover lip 130 by the sponge member for the light-weight formation as described above, when the skin layer 133 is formed by the solid member in correspondence with the trimportion of the solid member, the slightly foamed member of the background art, there is a concern that the skin layer 133 cannot follow elongation of the main body of the cover lip 130, wrinkles are produced at the surface of the bent cover lip 130 andan appearance thereof is deteriorated.
Therefore, it is desired to provide an opening trim weather strip in which wrinkles are not produced at a surface of a cover lip even when a light-weight opening trim weather strip is attached by being bent at a corner portion and which isexcellent in appearance and can easily and inexpensively be fabricated.
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