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1. (WO2017154342) SPRUE BUSHING

Pub. No.:    WO/2017/154342    International Application No.:    PCT/JP2017/000869
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Fri Jan 13 00:59:59 CET 2017
IPC: B29C 45/27
B33Y 80/00
B22F 3/105
B22F 3/16
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: ABE, Satoshi
阿部 諭
Title: SPRUE BUSHING
Abstract:
In order to provide a sprue bushing that can more favorably cool a molten raw material resin within a raw material resin flow passage, one embodiment of the present invention provides a sprue bushing having a raw material resin flow passage and a cooling medium flow passage that is provided to the periphery of the raw material resin flow passage, wherein a low heat transfer section is provided in a local region between the cooling medium flow passage and an upstream-side section of the raw material resin flow passage, said low heat transfer section having a relatively smaller heat transference than regions other than the local region.