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:
Nov. 10, 1998
Filed:
Dec. 29, 1997
Kevin Richard Ellwood, Ann Arbor, MI (US);
Deborah Frances Mielewski, Ann Arbor, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
An injection molding process for a thermoplastic resin using a mold having disrupters in the location in which weld lines will be formed. Molten resin is injected into a mold cavity as at least two separate streams having a flow front and a flow core. The mold cavity is filled with resin from each of the streams whereby a weld line will be formed at an interfacial area where the flow fronts meet. The disrupters located perpendicular to the resin flow direction disrupt the flow fronts prior to the interfacial area. The flow fronts are thereby fragmented. This allows the flow front fragments, and the flow cores to be more homogeneously dispersed within the interfacial area thereby increasing the weld line strength and appearance.