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:
Dec. 24, 2024
Filed:
Oct. 12, 2021
Applicant:
The Japan Steel Works, Ltd., Tokyo, JP;
Inventors:
Assignee:
THE JAPAN STEEL WORKS, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 45/47 (2006.01); B29C 45/60 (2006.01); B29C 45/62 (2006.01); B29C 45/74 (2006.01); B29C 45/76 (2006.01);
U.S. Cl.
CPC ...
B29C 45/47 (2013.01); B29C 45/60 (2013.01); B29C 45/62 (2013.01); B29C 45/74 (2013.01); B29C 45/76 (2013.01); B29C 2945/7613 (2013.01);
Abstract
A stepped flight is formed on a screw of an injection molding machine. The stepped flight is a flight in which a step-shaped step portion is formed on a top portion thereof. The top portion of the flight includes a large diameter portion on an upstream side and a land portion on a downstream side. When a gap ratio m of a gap Hbetween the land portion and a bore of the heating cylinder to a gap Hbetween the large diameter portion and the bore is defined as H/H, the gap ratio m is selected to be 2.3≤m≤6.4.