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:
Jul. 18, 2006
Filed:
May. 12, 2003
Chia-chun Hsu, KeeLung, TW;
Wann-fu Su, Hsinchu, TW;
Ming-chi Chen, YiLan, TW;
Chuan-feng Chen, TuCheng, TW;
Chia-Chun Hsu, KeeLung, TW;
Wann-Fu Su, Hsinchu, TW;
Ming-Chi Chen, YiLan, TW;
Chuan-Feng Chen, TuCheng, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
The present invention is a force detecting controlling device for a screw of an injection molding machine, which utilities a load cell as a force sensor for injection, holding pressure and back pressure. The load cell arranged on a rear fixed plate directly detects a force applied onto a ball screw nut. Because the ball screw nut is fastened on the load cell, and the load cell is fixed on the rear fixed plate, the force on a ball screw is directly transmitted to the ball screw nut. Therefore, a total value of the force on the ball screw produced by back pressure and friction among mechanical parts are equal to a force value of the ball screw nut applying onto the load cell. The injection force detected via the load cell for an instant response reaches a close loop control and procedures of holding pressure and back pressure are specifically controlled as well.