HOT SPRUE VALVE ASSEMBLY FOR AN INJECTION MOLDING MACHINE

A hot sprue valve assembly is provided for controlling flow of molten material through a hot sprue bushing of an injection molding machine The valve assembly is particularly designed for use with an injection molding machine for molding centrally apertured record discs, such as video information dis...

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Bibliographische Detailangaben
1. Verfasser:	MAYER, BRUNO F. P
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACTUATING-FLOATS AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TAPS THERMAL INSULATION IN GENERAL TRANSPORTING VALVES WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A hot sprue valve assembly is provided for controlling flow of molten material through a hot sprue bushing of an injection molding machine The valve assembly is particularly designed for use with an injection molding machine for molding centrally apertured record discs, such as video information discs. The valve assembly includes a poppet valve movable between an open position to allow flow of molten discforming material into a mold cavity, and a closed position to prevent flow of the disc-forming material into the mold cavity. The poppet valve is designed to mold a central aperture in the disc upon movement to the closed position, and the valve assembly is designed to accommodate air ejector apparatus for removing a solidified record disc from the machine.