| 摘要 |
PURPOSE:To offer a product which possesses no crack and sufficient strength in its weld line and possesses few air accumulation and short mold, by providing a pin gate which is larger than a thickness of a gate part of an injection-molded product. CONSTITUTION:The whole of a product 6 is molded by a method wherein injected plasticized resin passes through a runner 8 and jetted through a protruded pin gate holes 5, 5' which have been obtained through a sprue 7. Air in the inside of a mold is discharged outside through air vents 4, 4'. As a gate cut plate 9 is broken as the mold is in a three plate method through which the mold is separated into three parts, the runner 8 is separated from the mold and the pin gates 5, 5' are cut off from the product 6. The product 6 is unloaded by ejecting an ejector rod 3 after a core 1 and cavity 2 have been broken afterward. |
