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. 17, 2001
Filed:
Aug. 17, 1999
Kevin A. McCullough, Warwick, RI (US);
James D. Miller, Marietta, GA (US);
Chip Coolers, Inc., Warwick, RI (US);
Abstract
A plunger machine for molding reinforced polymer is provided. The plunger machine has particular application in molding polymer that is reinforced with particles having an aspect ratio greater than 1:1. The plunger machine includes a barrel housing with a smooth barrel bore that defines a main melt chamber. A plunger housing, having a plunger bore, defines an initial melt chamber that is in communication with the main melt chamber. A plunger resides in the plunger bore and is reciprocatable therein. The barrel bore is continuously inwardly to provide a smooth transition and alignment of reinforcing members in the polymer mixture during the melt process. The smooth bore ensures substantial alignment of the reinforcement members with the longitudinal axis of the bore to avoid excessive breakage of the reinforcing particles and prepare the polymer mixture for extrusion into a mold assembly.