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:
Apr. 26, 2005
Filed:
Jun. 12, 2001
Hiroshi Yamaki, Kanagawa, JP;
Hiroshi Yamaki, Kanagawa, JP;
Asahi Kasei Kabushiki Kaisha, Osaka, JP;
Abstract
The invention is to ensure that in injection molding a molten resin having carbon dioxide dissolved therein as a plasticizer, a sufficient amount of carbon dioxide to achieve satisfactory improvement in flowability is dissolved in the molten resin so that the flowability of the molten resin is significantly improved while enabling the production of a non-foamed molded article. Specifically, in the invention, a molten resin having dissolved therein a sufficient amount of carbon dioxide to improve its flowability is filled into a mold cavity while allowing to foam at the flow front of the molten resin, and the resin in the mold cavity is then pressurized to at least a pressure at which it does not foam.