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1. (WO2018015834) PUNCH FOR COMPRESSION MOLDS

Pub. No.:    WO/2018/015834    International Application No.:    PCT/IB2017/054096
Publication Date: Fri Jan 26 00:59:59 CET 2018 International Filing Date: Sat Jul 08 01:59:59 CEST 2017
IPC: B29C 33/10
B29C 43/36
B29C 33/04
B29C 43/50
B29L 31/56
B29C 43/02
Applicants: SACMI COOPERATIVA MECCANICI IMOLA SOCIETA' COOPERATIVA
Inventors: PENAZZI, Davide
Title: PUNCH FOR COMPRESSION MOLDS
Abstract:
It is described a punch for the compression molding of plastic material for forming capsules for containers closure, wherein the punch comprises a stem portion made of steel and a head portion made of copper alloy screwed to said stem portion, wherein a separation interface between said stem portion and head portion comprises a passage for gas that reaches a bottom surface of the punch delimitating one forming cavity where the compression molding of the plastic material occurs, and wherein one channel internal to said head portion communicates with said passage for gas to enable to extract gas out of the forming cavity.