Patent ID: 8256823
Filing Date: 2012-09-04
Classification: B29C,B29L,B60J,Y10T

Abstract:
1. A core of a trim, the core being made of a long and substantially strip-shaped core material separately preformed with a predetermined thickness equal to or smaller than 1.0 mm, the core comprising a plurality of core pieces and connection portions connecting the plurality of core pieces to each other in a longitudinal direction, the core pieces being disposed at a predetermined interval in the longitudinal direction because separation spaces are formed by press punching a part of the core material at a predetermined interval in the longitudinal direction or because separation spaces are formed by extending, in the longitudinal direction, slits formed at a predetermined interval in the longitudinal direction of the core material, the core being embedded in and integrated with the trim by being covered with a trim polymer material when the trim having a large length is formed, wherein a filler polymer material is filled into the separation spaces and held between the adjacent core pieces in a state in which the filler polymer material does not adhere to the core pieces, the filler polymer material being capable of chemically joined to the trim polymer material and having a lower hardness and being more flexible than the core material to such an extent as not to prevent the adjacent core pieces from being moved closer to or away from each other, so that, when forming the trim, a difference in mold shrinkage of the trim polymer material in the thickness direction between portions of the trim polymer material covering the core pieces and the connection portions and portions of the trim polymer material covering the separation spaces filled with the filler polymer material is decreased or eliminated, wherein portions of the filler polymer material filled into the separation spaces are connected each other, wherein the entire surface of the core pieces and the connection portions are covered with the filler polymer material, and the filler polymer material covering the core pieces and the connection portions has a thickness that does not exceed the thicknesses of the core pieces and the connection portions and is continuous with the filler polymer material filled into the separation spaces.