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. 28, 2010
Filed:
Jul. 21, 2005
Akio Okamoto, Sanyouonoda, JP;
Kazuaki Miyamoto, Ube, JP;
Akio Okamoto, Sanyouonoda, JP;
Kazuaki Miyamoto, Ube, JP;
Ube Machinery Corporation, Ltd., Ube-shi, JP;
Abstract
An injection-foaming method for a thermoplastic resin comprising using an injection unitprovided with a hopper, a plasticizing cylinderand a screw, and a moldhaving a mold cavityof changeable capacity; filling the mold cavitywith a foaming-agent-containing melted resin injected from the injection unit; and then enlarging the mold cavityfor allowing the foaming-agent-containing melted resin to expand, wherein inclusion of a foaming agent into a thermoplastic resin is done by using a mixture of a foam nucleating agent and a foaming gas as foaming agent, feeding the mixture to hopperor plasticizing cylinderand screwof injection unitat a pressure of 0.1 MPa or more and less than 1.0 MPa, and contacting the mixture with a pre- or post-plasticized thermoplastic resin present in hopperor plasticizing cylinderand screw