Molding apparatus

Patent metadata

Field	Value
Publication number	US-2016288390-A1
Application number	US-201414777632-A
Country	US
Kind code	A1
Filing date	Mar 20, 2014
Priority date	Mar 26, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

In order to achieve lower costs in a molding apparatus using a mold by reducing mold cleaning steps following releasing of the product from the mold and shortening the molding cycle, the apparatus is equipped with a plurality of fixed molds and movable molds which are heated to the temperature necessary to harden a molding material and come together by means of clamping to form a cavity, and a non-heated cold runner which supplies the molding material from an injection device to the interior of the cavity via a gate opened in the movable mold, the fixed molds and movable molds being movable between an injection stage where the injection device and cold runner ( 32 ) are present and an opening stage near the injection stage.

First claim

What is claimed is:

1 . A molding apparatus comprising:
plural sets of fixed metal molds and movable metal molds which are heated to a necessary temperature for curing a molding material and are got together by mold clamping so as to define a cavity; a non-heated cold runner which supplies the molding material from an injection device into said cavity via a gate provided in said movable metal mold; an injection stage in which said injection device and the cold runner exist; and a mold opening stage which is in the vicinity of the injection stage and opens said fixed metal mold and the movable metal mold, wherein said fixed metal molds and the movable metal molds are movable between said injection stage and said mold opening stage, wherein a product molded within said cavity and a burr molded within said movable metal mold in said injection stage are separated by mold opening in said mold opening stage.

2 . The molding apparatus according to claim 1 , wherein the cold runner is provided with an inlet valve which can operate so as to open and close from an external portion.

Assignees

• Nok Corp

Inventors

• Koga Shotaro
• Urakawa Tetsuya
• Masaka Takeshi
• Kurano Yoshihiro
• Watanabe Shigeru
• Shimazoe Toshihiro

Classifications

• B29C45/2756 Primary

  Cold runner channels · CPC title

• B29K2021/00

  Use of unspecified rubbers as moulding material · CPC title

• B29C45/0001

  characterised by the choice of material · CPC title

• B29C33/38

  characterised by the material or the manufacturing process (B29C33/44 takes precedence) · CPC title

• B29C45/32

  having several axially spaced mould cavities {, i.e. for making several separated articles} · CPC title