| 摘要 |
PROBLEM TO BE SOLVED: To incorporate a small friction with paper, a small wear of a molding itself, excellent durability and heat resistance by integrally molding a resin composition made of a crystalline polyester resin, a rubber modified styrene resin and an inorganic filler by an injection hollow molding method. SOLUTION: The hollow branch pawl 1 comprises a shaft 2, and many pawls 3. The shaft 2 and the pawls 3 are integrally molded of a resin. In this case, a resin composition containing 100 pts.wt. of a resin component containing 95 to 20 wt.% of a crystalline thermoplastic polyester resin and 5 to 80 wt.% of a rubber modified polystyrene resin, and 10 to 100 pts.wt. of a filler is hollow molded. In the injection molding, a molten resin is injected in a cavity of a mold, a fluid for forming a hollow portion 5 in the molten resin is press injected during injecting or after the injecting, and cooled while applying a pressure to the molten resin through the fluid, thereby obtaining the hollow molding.
|
