公开(公告)号：US11986987B2

公开(公告)日：2024-05-21

申请号：US17437241

申请日：2020-03-06

Applicant: Shibaura Machine Co., Ltd.

Inventor： Hiroyuki Onuma

IPC: B29C45/76 ,  B29C45/04 ,  B29C45/84 ,  B29C45/17

CPC classification number: B29C45/768 ,  B29C45/0441 ,  B29C45/84 ,  B29C2045/1784 ,  B29C2945/76163 ,  B29C2945/76254

Abstract: An injection molding machine includes: a timing belt wound around a driving-side rotation member and a driven-side rotation member and configured to transmit power from the driving-side rotation member to the driven-side rotation member; a driving-side rotation detecting unit configured to detect a rotational speed of the driving-side rotation member; a driven-side rotation detecting unit configured to detect a rotational speed of the driven-side rotation member; and an abnormality detecting unit configured to detect an abnormality in the timing belt based on a relative speed difference between the rotational speed of the driving-side rotation member detected by the driving-side rotation detecting unit and the rotational speed of the driven-side rotation member detected by the driven-side rotation detecting unit in a predetermined period after the driving-side rotation member starts to rotate from a stopped state.