Piston driven pin closure nozzle assembly
AssigneeOtto MäNner GmbH
InventorsRaimund Friderich, Otto Manner
Life of this patent
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Abstract
A pin closure nozzle for injection molding molds has several working pistons acting on the same closure pin. These working pistons are arranged on a common throughgoing piston rod. Each piston rides in its own chamber and the piston rod passes through and is slidingly guided in openings in the chamber floors. The piston rod thus has at least two sliding guides and is accordingly prevented from tilting.
Claims23
A nozzle for feeding molten material to an injection mold, comprising wall means defining a flow path for the molten material and at least two chambers spaced from said flow path, each of said chambers having a respective end wall with an opening therethrough, a valve member movable between a first position in which said flow path is open and a second position in which said flow path is closed;
- and operating means for said valve member, said operating means including an elongated actuating member for moving said valve member, and said actuating member extending through and being guided by said openings, said operating means further including a piston member in each of said chambers, and said piston members being connected to said actuating member so that said piston members are essentially fixed against relative movement longitudinally of said actuating member, wherein each of said openings has a peripheral surface and said actuating member directly contacts said peripheral surfaces.
Dependencies are inferred from the claim text.