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:
Feb. 01, 1994
Filed:
Jun. 12, 1991
Vernon A Daniels, Brooklyn, MI (US);
Anthony Gill, Rochester, MI (US);
William A Nelson, New Baltimore, MI (US);
Automotive Plastic Technologies, Sterling Heights, MI (US);
Abstract
An improved injection molding system having gas injected through an injection pin associated with an ejector pin. The injection pin is movable between a retracted position at which it is sealed from the mold cavity, to an extended position where it delivers gas into the cavity. In a first embodiment, the injection pin is powered by a cylinder to move between the extended and retracted positions. In a second embodiment, the injection pin is actuated by the pressurized gas. The improved system injects gas into a mold cavity without the requirement of a separate injection aperture. Further, the inventive injection pins have outlet ports sealed from the flow of plastic until the injection pin is extended to deliver the gas.