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:
Nov. 05, 1991
Filed:
Jun. 15, 1990
Applicant:
Inventors:
James W Stroud, III, Cleveland, OH (US);
John F Dodds, Newbury, OH (US);
Assignee:
Allen-Bradley Company, Inc., Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
425145 ; 264 405 ; 264 407 ; 425149 ;
Abstract
A controller for an injection molding machine controls the injection ram by reference to profiles having segments with programmable setpoints. The injection molding machine is initially controlled during each segment in an open-loop manner. Closed-loop control is then adopted. The difference between the process signal, e.g. ram velocity, and the setpoint at the end of each segment is used to change the current setpoint to improve the open-loop accuracy over time. The learning rate of change of the open-loop setpoints decreases after the initial correction.