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:
Sep. 10, 2024
Filed:
Oct. 30, 2020
Applicant:
The Japan Steel Works, Ltd., Tokyo, JP;
Inventors:
Assignee:
The Japan Steel Works, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29C 45/76 (2006.01); G01M 99/00 (2011.01); G01P 15/00 (2006.01);
U.S. Cl.
CPC ...
B29C 45/76 (2013.01); G01M 99/00 (2013.01); G01P 15/00 (2013.01); B29C 2945/76163 (2013.01); B29C 2945/76187 (2013.01); B29C 2945/76451 (2013.01);
Abstract
An abnormality detection apparatus for detecting an abnormality of a ball screw provided in an injection molding machine includes: a vibration sensor configured to detect vibration of the ball screw; and a computation unit configured to detect an abnormality of the ball screw based on information related to a distribution of frequency components obtained by frequency analysis of a vibration intensity detected by the vibration sensor, and information related to a distribution of frequency components obtained by frequency analysis of a vibration intensity detected when the ball screw, which is normal, operates.