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:
May. 17, 2005
Filed:
Dec. 13, 2002
Ming-chang Teng, Hsinchu, TW;
Hsiang-nien Chung, Hsinchu, TW;
Wen-hung Feng, Hsinchu, TW;
Ming-chi Chen, Hsinchu, TW;
Ming-Chang Teng, Hsinchu, TW;
Hsiang-Nien Chung, Hsinchu, TW;
Wen-Hung Feng, Hsinchu, TW;
Ming-Chi Chen, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A clamping device for injection-molding machine includes a high-speed screw rod unit having a nut element screwed thereto and a movable mold holder connected to a front end thereof, a clamping screw rod unit screwed to a rear end of the nut element and connected to a transmission assembly, a pre-pressing unit adjustably tightened to the clamping screw rod unit for the latter to generate a pre-pressure against the nut element, and a braking unit adapted to brake the nut element. When the nut element is not braked, the high-speed screw rod unit is driven by the transmission assembly to move forward at high speed for closing mold. And, when the nut element is braked and the clamping screw rod unit is driven by the transmission assembly to rotate relative to the nut element, the nut element is linearly pushed forward to generate a high-pressure clamping force during closing mold.