Method of operating an injection molding machine with continuously operating plasticizing unit
First Claim
1. 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.
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Accused Products
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.
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Citations
4 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4)
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Specification