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Valve Gate Actuation Method and Apparatus

IP.com Disclosure Number: IPCOM000008031D
Publication Date: 2002-May-13

Publishing Venue

The IP.com Prior Art Database

Abstract

In an injection molding machine, a valve gate actuation method and apparatus is provided for use in the flow control of molten material to a mold cavity. The valve gate actuation method comprise a flexible bladder operatively attached at one to an elongated valve stem. The valve stem extends from the bladder to a gate area of an injection nozzle. Communication of a pressurized fluid to the flexible bladder provides the motive force to selectably open and close the nozzle gate.