| 摘要 |
PROBLEM TO BE SOLVED: To precisely injection-mold a part, which has pores crossing at a predetermined angle communicating with each other, as an integrated molded product without flash. SOLUTION: A first core pin 25 and a second core pin 26 for forming first and second pores 2 and 3 crossing in a T-shape to communicate with each other are arranged in the cavity 13 of an injection molding machine 10 and the contact parts of them are supported from below by a movable core pin 27 so as not to be displaced by the injection pressure of a molten resin. The pores 2 and 3 can be formed precisely and it is prevented that flash is formed at the communication part of these pores. Since the movable core pin 27 is drawn out of the cavity 13 in a state that the resin injected in the cavity is flowable, the unnecessary pore or recessed part caused by the movable core pin 27 is not formed to the molded product. COPYRIGHT: (C)2005,JPO&NCIPI
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