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:
Jun. 17, 1997
Filed:
Nov. 18, 1994
Robert W Pennisi, Boca Raton, FL (US);
Gregory D Jackson, Plantation, FL (US);
Glenn F Urbish, Coral Springs, FL (US);
Louis D Megleo, Zyon, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A process for molding dimensionally accurate plastic articles using a low pressure injection molding technique. The process utilizes a two-piece silicone rubber mold having a cavity representative of the shape of the article to be molded. The mold is substantially encased on all sides in a rigid mold box to prevent deformation of the cavity during the molding process (10). The mold box and the encased mold are placed in a vacuum chamber, and a vacuum is drawn on the chamber to evacuate the cavity (20). A predetermined amount of a reactive mixture is simultaneously mixed and injected under pressure into the mold to form the plastic article (30). The amount of material injected is sufficient to fill the cavity but not sufficient to distort the cavity. The chamber is vented (40) and the mold is removed from the mold box (50). The mold is flexed in order to remove the plastic article from the mold (60).