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:
May. 05, 2026
Filed:
Feb. 24, 2022
Shibaura Machine Co., Ltd., Chiyoda-ku, JP;
Nobuyuki Asanuma, Numazu, JP;
Shibaura Machine Co., Ltd., Chiyoda-ku, JP;
Abstract
A control method for an injection molding machine includes a measurement process of feeding a quantity of molten resin along a length of a heating barrel by moving a screw backward while rotating the screw in the heating barrel for melting a resin material, during the measurement process before the measurement process is completed, reducing a rotational speed of the screw at a same time as reducing a backward movement speed of the screw, stopping backward movement of the screw when the measurement process is completed, and the rotational speed and a rotation direction of the screw are controlled such that a back pressure becomes a target pressure at a target time lower than the back pressure that is measured at a time when the measurement process is completed, and injecting the molten resin into a mold after reaching the target time.