Apparatus for forming plastic articles
AssigneeHusky Injection Molding Systems Ltd.
InventorsManfred Lausenhammer, Arnold Mai
Life of this patent
Estimating the term…
Abstract
At least one mold is provided having a mold cavity and a mold gate communicating with the mold cavity, an injection nozzle for feeding molten plastic material to the injection mold having a nozzle outlet in line with the mold gate, and a thin movable valve gating arrangement positioned between the mold gate and nozzle outlet having an orifice therein permitting and shutting off flow of molten plastic from the nozzle to the mold.
Claims16
A system for injection molding a plurality of articles which comprises:
- a plurality of mold cavity spaces;
- each said mold cavity space having a mold gate;
- means for feeding at least two different molten materials to each of said mold cavity spaces via said mold gates;
- movable valve gating means between each of said mold gates and said feeding means;
- said movable valve gating means having a plurality of orifices;
- means for moving said valve gating means between at least one position wherein said orifices communicate with said mold gates so as to permit flow of at least one of said molten materials to each of said mold cavity spaces and a closed position wherein flow of said molten materials to said mold cavity spaces is blocked;
- and
- said valve gating means being sufficiently thin that during movement of said valve gating means between said positions substantially no molten material is carried by said valve gating means.
A system for injection molding a plurality of articles which comprises:
- a plurality of mold cavity spaces;
- each said mold cavity space having a mold gate;
- means for feeding at least two different molten materials to each of said mold cavity spaces via said mold gates;
- movable valve gating means between each of said mold gates and said feeding means;
- said movable valve gating means having a plurality of orifices therein;
- means for moving said valve gating means between a first position wherein said orifices are aligned with said mold gates so as to permit flow of a first one of said molten materials to each of said mold cavity spaces, a second position wherein said orifices are aligned with said mold gates so as to permit flow of a second one of said molten materials to each of said mold cavity spaces, and a closed position wherein flow of each of said molten materials to said mold cavity space is blocked;
- and
- said valve gating means being sufficiently thin that during movement of said valve gating means between said positions substantially no molten material is carried by said valve gating means.
A system for injection molding a multi-material article comprising:
- a mold cavity space having a mold gate;
- means for feeding at least two different molten materials to said mold cavity space via said mold gate;
- valve gating means for permitting flow of said molten materials from said feeding means to said mold cavity space and for blocking flow of said molten materials from said feeding means to said mold cavity space;
- said valve gating means having at least two orifices;
- a first one of said orifices being positioned between said feeding means and said mold gate to allow a first one of said molten materials to flow from said feeding means to said mold gate;
- and
- a second one of said orifices being positioned between said feeding means and said mold gate to allow a second one of said molten materials to flow from said feeding means to said mold gate.
Dependencies are inferred from the claim text.