INJECTION-MOLDED ARTICLE HAVING A PLURALITY OF HOLLOW PARTS AND INJECTION MOLDING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an injection-molded article constituted of a slit and a resin part surrounding the whole of the slit and having desired hollow parts certainly formed in the resin part. SOLUTION: In the injection-molded article constituted of the slit 20 and the resin part 10 surrounding the whole of the slit, the resin part 10 is constituted of a first resin part 11 positioned along one end of the slit 20, a plurality of second resin parts 12A and 12B extended from the first resin part 11 along the slit 20 in the extending direction of the slit 20 and the third resin part 13 held between the second resin parts 12A and 12B and positioned along the other end of the slit 20. Pressure fluid introducing marks 14A and 14A are formed to the first resin part 11 and hollow parts 15, 15A and 15B extended from the pressure fluid introducing marks 14A and 14B are formed to the first resin part 11 and the second resin parts 12A and 12B. No hollow part is formed to the third resin part 13.