Patent ID: 9174372
Filing Date: 2015-11-03
Classification: B29C

Abstract:
1. A method of making a shaped part, comprising: closing a tool comprising a first portion comprising a nozzle and a second portion comprising a shut off pin opposite the nozzle, and a film gate and a mold cavity formed between the first portion and the second portion; injecting polymer melt into the mold cavity of the tool, wherein the polymer melt flows through the nozzle and through the film gate; blocking the nozzle by direct contact with the shut off pin; completing a compression stroke wherein the mold cavity is compressed, a thickness of the film gate is decreased, and the shut off pin moves; releasing the shut off pin; pushing the shut off pin in the opposite direction of the nozzle; opening the tool; ejecting the shaped part; and pulling leftover material from the nozzle with the shut off pin.