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:
May. 13, 1997
Filed:
Dec. 27, 1994
Applicant:
Inventors:
Naohisa Nagasaka, Aichi, JP;
Masayuki Goto, Aichi, JP;
Shogo Sugiyama, Aichi, JP;
Yukio Kawakita, Aichi, JP;
Masanao Ishikake, Aichi, JP;
Assignee:
Toyoda Gosei Co., Ltd., Nishikasugai-gun, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
264 469 ; 264 455 ; 264102 ; 264240 ; 264245 ; 2643286 ; 2643288 ; 425 / ; 425130 ; 425173 ; 425543 ; 425546 ;
Abstract
Provided is a method of making a multi-property polyurethane part by RIM having a surface layer and an interior layer. The surface layer and the interior layer have different properties. The pressure in the cavity of the mold is reduced and a surface forming RIM polyurethane material is injected into the evacuated cavity, whereby the surface layer of the molded part is formed by RIM. An interior forming RIM polyurethane material is injected into the evacuated cavity, whereby the interior of the molded part is also formed by RIM.