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. 14, 1996
Filed:
Jan. 19, 1994
William M Lester, Livingston, NJ (US);
Other;
Abstract
Horizontally movable mold halves respectively journal different plungers for movement within coaxial bores extending through the closed mold halves. With the mold closed, and one plunger extending through the mold to one side, a metered compartment is formed between the two carefully positioned plungers. A charge of molten metal, or the like, is transferred from a reservoir into the compartment and moved into the mold cavity by moving the two plungers in unison to a position at the die surface of the respective mold halves. After hardening, the mold halves are separated and one plunger ejects the molded article from the mold. The plungers and mold halves are moved by hydraulic cylinder rams into a sequence of fixed positions for different steps of a programmable molding cycle. Sensing switches provide feedback for establishing the plunger positions at various cycle steps. In particular a variable movable sensing switch establishes the capacity of the molten metal metered compartment to produce a charge precisely tailored for the mold cavity.