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:
Jan. 22, 1980
Filed:
Aug. 10, 1978
Jasper D Barber, Charlotte, NC (US);
Charlotte Pipe and Foundry Company, Charlotte, NC (US);
Abstract
An injection molding apparatus, including a mold having a mold cavity therein defining the outer periphery of a pipe fitting, has a core pin assembly adapted to be positioned in the cavity and which comprises opposing distal core sections whose proximal ends abut an intermediate core section therebetween. The core sections are mutually separable and have passages for accommodating a fluid coolant therein, and when the core sections are assembled, at least certain passages in either or both distal core sections are in fluid intercommunicating relation with passages in the intermediate core section. Means is provided for circulating fluid coolant through passages in all the core sections and comprises pump means for pumping fluid coolant at a predetermined pressure through the intercommunicating passages and for concurrently withdrawing the coolant therefrom at a suction pressure greater than the predetermined pressure to prevent leakage of the coolant from the intercommunicating passages outwardly between the abutting proximal ends of the corresponding core sections and into the mold cavity.