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:
Jul. 22, 1986
Filed:
Apr. 23, 1984
Applicant:
Inventor:
Nobuyoshi Sasaki, Yokohama, JP;
Assignee:
M.C.L. Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264572 ; 264513 ; 2643281 ; 26432816 ;
Abstract
An injection molding process for molding an article having accurate dimensions without sink marks includes the step of feeding high pressure air into the core portion of a shell or solid molded mass formed by the preceding injection molding step. Preferably, the wax material is injected into a mold cavity through a throttled inlet port to flow thereinto as a vigorous turbulent flow. A separate flow line is provided for feeding high pressure air in the preferred embodiment. More preferably, the volume of injected wax is substantially smaller than the volume of mold cavity.