Method of operating an injection molding machine with continuously operating plasticizing unit
AssigneeKraussMaffei Technologies GmbH
InventorRainer Zimmet
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Abstract
In a method of operating an injection molding machine of a type having an injection plunger for pushing melt from an injection space anteriorly of an injection plunger into an injection mold, a plasticizing screw of an extruder is continuously operated to continuously feed melt through a melt channel into the injection space. A passage through the melt channel is closed to allow backup of melt backwards into the extruder, and the injection plunger is moved forward to inject a shot amount from the injection space into the injection mold.
Claims4
A method of operating an injection molding machine of a type having an injection plunger for pushing melt from an injection space anteriorly of an injection plunger into an injection mold, said method comprising the steps of:
- continuously operating a plasticizing screw of an extruder to continuously feed melt through a melt channel into the injection space, wherein the plasticizing screw defines an axis and is immobile in a direction of the axis;
- closing a passage through the melt channel to allow backup of melt backwards into the extruder;
- and
- moving the injection plunger forward to inject a shot amount from the injection space into the injection mold.
Dependencies are inferred from the claim text.