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:
Nov. 25, 2025
Filed:
Jun. 06, 2022
The Japan Steel Works, Ltd., Tokyo, JP;
Soma Mitani, Tokyo, JP;
Shogo Kosue, Tokyo, JP;
THE JAPAN STEEL WORKS, LTD., Tokyo, JP;
Abstract
An injection molding machine includes a screw provided in a cylinder having a nozzle at a tip so that the screw is allowed to be driven in a rotational direction and an axial direction, a drive device configured to drive the screw, and a control device configured to control an operation of the drive device, wherein the drive device has a rotatably provided ball screw shaft and a nut screwed onto the ball screw shaft and moved forward and backward in response to rotation of the ball screw shaft, and includes a ball screw configured to drive the screw in the axial direction by forward and backward movement of the nut, and the control device sequentially moves a screw position before injection and a screw position after injection in a molding process cycle so that a forward/backward movement range of the nut in the molding process cycle is dispersed.