Title:
HOPPER HOLE STRUCTURE OF INJECTION MOLDING MACHINE
Document Type and Number:
Japanese Patent JP3594818
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To protect a plurality of pellets from being bitten in even when a pellet-shaped resin is bitten between a screw flight and a hopper hole and reduce the fluctuation of slide resistance between a screw and a cylinder.
SOLUTION: Out of corners whereon formed the inner periphery of a hopper hole 4 and a screw opening 1b crossing each other, the angle β of a corner in the screw end direction is formed as 5°-40° in the direction reverse to the screw angle of a flight 3 of a screw 2 to increase the angle formed by the flight 3 of the screw 2 and the hopper hole 4, and even when a pellet-shaped resin 5 is bitten therein, the resin is slid along the flight 3 of the screw 2 and can be moved. Also it is desirable that the above angle β is so defined as to set the angle (α+β) formed by adding the helix angle α and the angle β as 20°-55°.
Inventors:
Makoto Yukihiro
Application Number:
JP31087898A
Publication Date:
December 02, 2004
Filing Date:
October 30, 1998
Export Citation:
Assignee:
Japan Steel Works, Ltd.
International Classes:
B29C45/18; B29C31/04; (IPC1-7): B29C45/18; B29C31/04
Domestic Patent References:
| JP7132539A | ||||
| JP504065U |
Attorney, Agent or Firm:
Nobuyuki Kaneda
Ishibashi Masayuki
Katsuhiro Ito
Ishibashi Masayuki
Katsuhiro Ito