System for feeding molten resin and method of feeding molten resin

摘要

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.

主权项

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.