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. 07, 1999
Filed:
Apr. 04, 1997
Kiyohiro Saito, Tokyo, JP;
Hiroshi Asami, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
In an injection step, actual injection speed V is closed-controlled so that the actual injection speed V becomes equal to first or second preset speed V.sub.1 or V.sub.2 while comparing the actual injection speed V with the first or second preset speed V.sub.1 or V.sub.2 in the section between S.sub.0 and S.sub.1 from the time when injection of molten resin is started up to the time when the molten resin reaches this side of a gate portion 46 or the section between S.sub.1 and S.sub.2 from the time when the molten resin reaches this side of the gate portion 46 up to the time when the molten resin reaches the inside of a cavity 3. The injection speed V is open- controlled to third preset speed V.sub.3 in the section between S.sub.2 and S.sub.3 from the time when the molten resin reaches the inside of the cavity 3 up to the time when injection of the molten resin is completed. Because a high injection speed can be secured and an injection speed change can be decreased, it is possible to decrease the frequency of a feed history appearing on the surface of a molded product.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile