Sprue-bush and method for manufacturing sprue-bush

Patent metadata

Field	Value
Publication number	US-11220032-B2
Application number	US-201716313781-A
Country	US
Kind code	B2
Filing date	Jun 28, 2017
Priority date	Jun 29, 2016
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

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.

First claim

The invention claimed is:

1. A method for manufacturing a sprue-bush, the method comprising:
forming a shaped part having a downstream raw resin-flow path portion and a downstream cooling medium-flow path portion therein such that the downstream cooling medium-flow path portion is positioned around the downstream raw resin-flow path portion and is also located to surround the downstream raw resin-flow path portion, 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 corresponding to a downstream side region of a cooling medium-flow path of the sprue-bush; and
locating the shaped part on a base part to manufacture the sprue-bush, the base part comprising a raw resin-flow path and a cooling medium-flow path therein,
wherein the shaped part is located on the base part by a performance of a formation of the shaped part on the base part in accordance with a selective laser sintering method, and
a formation of the base part is not performed in accordance with the selective laser sintering method.

2. The method according to claim 1 , wherein the shaped part is located on the base part such that the shaped part has a less than one-half dimension of a height dimension of the sprue-bush.

3. The method according to claim 1 , wherein a surface of the base part on which the shaped part is located is subjected to a rough process prior to the formation of the shaped part.

4. The method according to claim 1 , wherein the shaped part is formed at a location other than the base part and the formed shaped part is disposed on the base part.

5. The method according to claim 1 , wherein the base part is subjected to a machine process to decrease a height dimension of the base part before the shaped part is located on the base part.

6. The method according to claim 1 , wherein the base part includes an existing sprue-bush.

7. A method for manufacturing a sprue-bush, the method comprising:
forming a shaped part having a downstream raw resin-flow path portion and a downstream cooling medium-flow path portion therein such that the downstream cooling medium-flow path portion is positioned around the downstream raw resin-flow path portion and is also located to surround the downstream raw resin-flow path portion, 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 corresponding to a downstream side region of a cooling medium-flow path of the sprue-bush; and
locating the shaped part on a base part to manufacture the sprue-bush, the base part comprising a raw resin-flow path and a cooling medium-flow path therein, wherein
the cooling medium-flow path of the base part and the downstream cooling medium-flow path portion comprise a cooling medium-flow path of the sprue-bush, and wherein
a pitch of the cooling medium-flow path of the sprue-bush in a cross-sectional view gradually becomes smaller toward a downstream side-end surface of the sprue-bush at a downstream side region of the sprue-bush.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Watanabe Shinya
• Abe Satoshi
• Tanaka Kenichi
• Mori Mikio
• Uchinono Yoshiyuki

Classifications

• B22F12/20

  Cooling means · CPC title

• B22F10/66

  by mechanical means · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B29C45/2737 Primary

  Heating or cooling means therefor (B29C45/7331 takes precedence) · CPC title

• B29C33/3842

  Manufacturing moulds, e.g. shaping the mould surface by machining · CPC title