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:
May. 20, 2025
Filed:
Oct. 20, 2021
Lehigh University, Bethlehem, PA (US);
John P. Coulter, Schnecksville, PA;
Lehigh University, Bethlehem, PA (US);
Abstract
A polymer injection molding system in one embodiment includes a manifold comprising internal flow conduits configured for conveying polymer in a fluidic state. The manifold may be part of a hot or cold runner type molding unit. An injection nozzle fluidly coupled to the flow conduits interfaces with a mold cavity and is configured to inject polymer therein to form a molded article. The nozzle has a tubular valve body defining a central axial passage which receives a movable elongated valve pin. The valve pin is linearly movable to stop or permit polymer injection from the nozzle. The valve pin is further rotatable via a rotary drive mechanism to induce shear on the polymer. This maintains the polymer in its flowable fluidic state between molding cycles to prevent polymer cold slug formation within the nozzle which can disrupt flow resulting in incompletely formed articles.