公开(公告)号：US10953580B2

公开(公告)日：2021-03-23

申请号：US16313435

申请日：2017-06-28

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shinya Watanabe ,  Satoshi Abe ,  Kenichi Tanaka ,  Mikio Mori ,  Yoshiyuki Uchinono

IPC: B29C45/27 ,  B29C45/73

Abstract: In order to provide a sprue-bush which is capable of suitably cooling a melt raw resin in a raw resin-flow path as a whole, there is provided a sprue-bush, comprising a raw resin-flow path and a cooling medium-flow path located around the raw resin-flow path, wherein a width dimension of the raw-resin flow path gradually becomes larger toward a downstream side-end surface of the sprue-bush, and wherein the downstream side-end surface of the sprue-bush is a heat transfer surface.

公开(公告)号：US11220032B2

公开(公告)日：2022-01-11

申请号：US16313781

申请日：2017-06-28

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shinya Watanabe ,  Satoshi Abe ,  Kenichi Tanaka ,  Mikio Mori ,  Yoshiyuki Uchinono

IPC: B29C45/27 ,  B22F10/20 ,  B33Y80/00 ,  B29C33/38 ,  B33Y10/00

Abstract: To manufacture a sprue-bush which is capable of suitably cooling a melt raw resin in a raw resin-flow path as a whole, there is provided a method for manufacturing a sprue-bush, wherein a shaped part is located on a base part to manufacture the sprue-bush, the base part comprising a raw resin-flow path and a cooling medium-flow path, wherein, in the shaped part, a downstream raw resin-flow path portion is located and a downstream cooling medium-flow path portion is also located, the downstream raw resin-flow path portion corresponding to a downstream side region of a raw resin-flow path of the sprue-bush, the downstream cooling medium-flow path portion being positioned around the downstream raw resin-flow path portion and corresponding to a downstream side region of a cooling medium-flow path of the sprue-bush, and wherein the downstream cooling medium-flow path portion is located to surround the downstream raw resin-flow path portion.