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:
Oct. 30, 2001
Filed:
Nov. 13, 1998
Masahiro Tamaki, Susono, JP;
Jun Koike, Sunto-gun, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
An injection apparatus for a motor-driven injection molding machine comprised a barrel unit for heating and plasticating polymer material, a screw disposed in the barrel unit rotatably and movably in the axial direction, a first rotating shaft having one end connected to a rear end of the screw, a charging motor for driving the first rotating shaft for rotation, a ball screw mechanism consisting of a second rotating shaft having a threaded rod portion, and a threaded nut member engaging with the threaded rod portion, an injection carriage having a front plate for mounting the barrel unit thereon, and a rear plate for supporting the second rotating shaft at the rear end thereof, an injection motor for driving the ball screw mechanism, and an intermediate mount plate, disposed movably between the front plate and the rear plate, for linking the first rotating shaft to the second rotating shaft coaxially with a predetermined distance spaced apart between the rear end of the first rotating shaft and the front end of the second rotating shaft. Back pressure acting on the screw in a charging process can accurately be controlled without requiring a difficult control operation for controlling the injection motor and the charging motor for synchronous operation.