| 摘要 |
PURPOSE:To facilitate molding and improve the appearance and quality by inserting an insertion part sealed previously with high pressure gas into parison being extruded, and integrating the expanding insertion part with a parison forming the main body of a molding as an interior trim part through closing the mold. CONSTITUTION:Since an insertion part 14 being placed in the inner part of a parison 16 is sealed with high pressure gas therein, the elastic modulus of thermoplastic resin forming the insertion part 14 by the head held in the parison 16 falls, the part 14 softens and begins to expand. In the next place, as molding dies 10,11 are moved into the arrow directions gradually, the parison 16 for forming the main body of a hollow molding article comes into contact successively with a part of outer periphery of an interior trim part 18 formed through expansion of the part 14, and then, they are integrated easily. Simultaneously, as the rod 13 of an actuator 12 is extracted in the direction of an arrow, after that, a split die 19 is moved in the arrow direction for clamping, and then, gas is sent thereinto by a blow pin P being faced to an inner space B, the parison 16 is brought into press contact with the inner wall of the molding dies 10,11 and split die 19, thereby being formed as the main body of a follow molded article 17. |
