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. 24, 2012
Filed:
Jul. 02, 2009
Yoshiya Taniguchi, Akashi, JP;
Yoshiya Taniguchi, Akashi, JP;
Toyo Machinery & Metal Co., Ltd., Akashi-shi, JP;
Abstract
Provided is an electric die casting machine capable of achieving high injection speed and high boost pressure. An injection unit () is provided with an electric servomotor () for injection in a first stage, a ball screw mechanism () (motion converting mechanism in the first stage) for converting rotational motion of the electric servomotor for injection in the first stage into rectilinear motion of a linear motion body (), electric servomotors (and) for injection in a second stage, mounted on the linear motion body, a crank mechanism (and) (motion converting mechanism in the second stage) for converting rotational motion of the electric motor servomotor for injection in the second stage into rectilinear motion of an injection plunger (), and a control unit () for controlling driving of each electric servomotor for injection. The control unit drives only the electric servomotor () for injection in the first stage independently in a low-speed injection step, and drives both the electric servomotor () for injection in the first stage and the electric servomotors (and) for injection in the second stage simultaneously in a high-speed injection step and a pressure intensification step.