System for feeding molten resin and method of feeding molten resin

Patent metadata

Field	Value
Publication number	US-9573309-B2
Application number	US-201214003085-A
Country	US
Kind code	B2
Filing date	Mar 8, 2012
Priority date	Mar 10, 2011
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

To efficiently feed a molten resin to the resin holders. An intermittently feeding device works to intermittently feed a transfer unit equipped with resin holders, and has a cam supported by a motor via a support. The cam is rotated by the motor. A cam follower of a moving block meshes with the screw of the cam, and the moving block moves along a support rail accompanying the turn of the cam. The motor rotates at a constant speed, and the transfer unit 3 is fed intermittently depending on the shapes of the cam and of the cam follower.

First claim

The invention claimed is:

1. A system for feeding a molten resin, comprising:
an extruder for extruding the molten resin through an extrusion port;
resin holders for receiving the molten resin from said extrusion port;
transfer units equipped with a plurality of said resin holders; and
compression forming apparatuses having a plurality of metal molds;
intermittently feeding devices which vary the moving speed of said transfer units at a moment when said resin holder receives the molten resin;
said intermittently feeding devices configured to feed said transfer units at a feed speed which is zero or is slowed down at a position where said resin holder receives the molten resin so that the molten resin is continually and successively fed into said resin holders from said extrusion port;
the metal molds are disposed in a plurality of rows in said compression forming apparatuses;
said transfer units include a file-off mechanism for filing off said resin holders from a state of one row to a plurality of rows, the file-off mechanism aligning said resin holders in one row at the molten resin extrusion port and filing off said resin holders to a plurality of rows to meet the positions of the metal molds at the time of feeding the molten resin to the metal molds;
conveyer devices for moving said transfer units straight to said metal molds; and
change-over devices for changing over said intermittently feeding devices and said conveyer devices for said transfer units.

2. The system for feeding the molten resin according to claim 1 , wherein the compression forming apparatuses and the pair of the transfer units are located on both sides of said extrusion port; and
the transfer units include a lift, and are configured to be alternately transferred to a position to receive said molten resin in a manner that one transfer unit travels under the other transfer unit enabling the molten resin to be continually fed to the resin holders.

Assignees

• Hirota Norihisa
• Asano Yutaka
• Azuma Toshifusa
• Toyo Seikan Group Holdings Ltd

Inventors

• Hirota Norihisa
• Asano Yutaka
• Azuma Toshifusa

Classifications

• B29C31/048 Primary

  the material being severed at the dispensing head exit, e.g. as ring, drop or gob, and transported immediately into the mould, e.g. by gravity · CPC title

• B29C43/34 Primary

  Feeding the material to the mould or the compression means {(B29C43/085 takes precedence)} · CPC title

• B29C47/004 Primary

  Operations & Transport · mapped topic

• B29C2043/046

  travelling between different stations, e.g. feeding, moulding, curing stations · CPC title

• B29C2043/3623

  coupled on a support, e.g. plate · CPC title