The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2001
Filed:
Jun. 16, 1999
Applicant:
Inventor:
Kazuo Hiraoka, Chiba, JP;
Assignee:
Sumitomo Heavy Industries Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/577 ;
U.S. Cl.
CPC ...
B29C 4/577 ;
Abstract
The present invention is applicable to an injection molding machine comprising an injection device having a servo motor for use in rotating a screw and a controller for controlling the servo motor. The controller has a rotation speed N previously set therein as a set value for the screw rotation in a metering process. The controller rotates the screw at an acceleration A,until the rotation speed of the screw reaches a value N,(where N,<N). After that the controller carries out a control operation to rotate the screw at an acceleration A,until the rotation speed of the screw reaches the value N. The acceleration A,is higher than the acceleration A