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. 10, 2006
Filed:
Apr. 16, 2002
Akira Yoshinaga, Numazu, JP;
Jun Koike, Shizuoka-ken, JP;
Fumiyuki Kato, Shizuoka-ken, JP;
Makoto Nishizawa, Numazu, JP;
Akira Yoshinaga, Numazu, JP;
Jun Koike, Shizuoka-ken, JP;
Fumiyuki Kato, Shizuoka-ken, JP;
Makoto Nishizawa, Numazu, JP;
Toshiba Machine Co., LTD, Tokyo, JP;
Abstract
An object of the present invention is to suppress a clamping force from sharply increasing when dies are clamped in an electric direct-acting die clamping unit of an injection molding machine. A movable platen is arranged to face a stationary platen. A stationary die is attached to the front surface of the stationary platen, whereas a movable die is attached to the front surface of the movable platen. The movable platen is connected to the front surface of a backup plate via four coil springs. A nut of a ball screw is fixed at each of diagonally-opposed corners of the backup plate. The threaded rod of the ball screw passes through the backup plate via the nut. The tip portion of the threaded rod is rotatably connected to the stationary platen. The rear end portion of the threaded rod is connected to a motor.