| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection mold assembly of high versatility capable of forming a screw part to be formed inside an undercut part together with the undercut part without using a driving source such as an electric motor or the like, and also be able to easily correspond to a change or the like in the figure of the product to be molded. SOLUTION: A screw core 51 is held at the second part 50 in a core unit 4 and it is separated from a screw part 92, while rotating, through a rack 6 and a gearwheel train 7 when a first mold 2 and a second mold 3 are separated. A core 41 for undercut is formed as integrated in a monolithic form with a first part 40 of the core unit 4, and is released from an undercut part 91 by rubbing an inclined pin 34 with an inclined pin hole 57 on separating a movable side template 31 from a movable side wear plate 32. COPYRIGHT: (C)2008,JPO&INPIT
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