| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively provide a vent hole member constituted not only to smoothly discharge a formed gas but also to prevent the occurrence of foam refuse, unnecessary to remove the resin in a small hole (vent hole) and simple to attach and detach with respect to a mold. SOLUTION: A screw part 5 is formed to the outer periphery of the vent hole member body 1 which comprises a resin or rubber material such as polypropylene or Teflon and shows an almost cylindrical shape and of which the cylindrical interior is set to a vent hole 2 and a plurality of open/close pieces 3 are integrally formed to either one of the end parts in the longitudinal direction of the vent hole member body 1 to be made automatically openable and closable. COPYRIGHT: (C)2007,JPO&INPIT
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