| 摘要 |
PROBLEM TO BE SOLVED: To reduce the load necessary for the elastic deformation of a hollow seal part of a die-molding part by dropping the temperature of a die in molding a die to prevent a melting trace or a holding trace from being left behind on an extrusion part. SOLUTION: In an opening trim 10, connection end faces of two extrusion parts 11 provided with a hollow seal part 13 of extrusion-molded sponge EPDM rubber and a fitting part 12 of extrusion-molded solid EPDM rubber are connected by a die forming part 21 provided with a hollow seal part 23 and a fitting part which are of die-molded solid TPO, and a lightening hole 24 to reduce the load necessary for the elastic deformation is formed in a part of the hollow seal part 23.
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