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:
Jan. 08, 2002
Filed:
Sep. 14, 1999
Other;
Abstract
An object is to reduce mutual interference between a plurality of sets of molds coupled to a common frame stand to improve the processing accuracy. A plurality of sets (e.g. two sets) of molds are driven by servo motors ( ). The servo motors ( ) are individually controlled by servo amplifiers ( ), respectively. A control portion in the servo amplifier ( ) calculates a current (I) so that the measured value (X) of the rotating position of the servo motor ( ) follows a directing value (X ) sent from a CPU through a pulse generator ( ). A torque detecting/limiting portion ( ) limits the calculated current (I) so that a limit value of the torque sent from the CPU through a DA converter ( ) is not exceeded and sends it to the servo motor ( ) through a current amplifier ( ). When the torque of the servo motor ( ) reaches the limit value after the molds come in contact, the directing value (X ) is rapidly advanced in the mold-losing direction.