| 摘要 |
PURPOSE:To provide an injection mold wherein at the time of injection molding of a molded product possessing a through hole, the product which reduces drastically generation of a warp causing a defective phenomenon, moreover, is superior in molding accuracy, performs automatically gate cutting within the mold and does not leave gate marks behind on the surface can be obtained. CONSTITUTION:A cavity 30 demarcating an external circumferential form of a molded product possessing a through hole is formed between a front mold 11 and rear cavity 14 which is provided contactably and separatably freely on the front mold 11 and along with formation of a gate 31 allowing resin to flow into the cavity 30 from a position of the molded product where a through hole is to form in the front mold 11, a pin 34 which is made freely movable up to the inside of the gate 31 by passing through a part where the through hole of the cavity 30 is to form is provided in the rear cavity 14. |
