Method of influencing a backpressure length and/or a screw return speed
AssigneeEngel Austria GmbH
InventorsGuenther Klammer, Erich Hochreiter, Klaus Fellner, Thomas Koepplmayr
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Abstract
A method of influencing a backpressure length and/or a screw return speed in an axially extending plasticizing cylinder of a plasticizing unit for an injection moulding machine including a plasticizing screw arranged displaceably and rotatably in a cylinder bore of the plasticizing cylinder. Metering of plastic granulate fed to the plasticizing unit is carried out in dependence on the desired backpressure length in the plasticizing unit, and the plasticizing unit is operated in underfed mode.
Claims21
A method of influencing a backpressure length and a screw return speed in an axially extending plasticizing cylinder of a plasticizing unit for an injection moulding machine, the plasticizing unit including a plasticizing screw arranged displaceably and rotatably in a cylinder bore of the plasticizing cylinder, the method comprising:
- metering plastic granulate fed to the plasticizing unit depending on a desired backpressure length in the plasticizing unit, wherein the plasticizing unit is operated in underfed mode, and
- controlling the screw return speed using a screw peripheral speed of the plasticizing screw and a metered amount of the plastic granulate as setting variables.
A method of influencing a backpressure length and/or a screw return speed in an axially extending plasticizing cylinder of a plasticizing unit for an injection moulding machine, the plasticizing unit including a plasticizing screw arranged displaceably and rotatably in a cylinder bore of the plasticizing cylinder, the method comprising:
- metering plastic granulate fed to the plasticizing unit depending on a desired backpressure length in the plasticizing unit, wherein the plasticizing unit is operated in underfed mode,
- wherein metering of the plastic granulate fed to the plasticizing unit is further carried out depending on a desired screw return speed in the plasticizing unit.
A method of influencing a backpressure length and/or a screw return speed in an axially extending plasticizing cylinder of a plasticizing unit for an injection moulding machine, the plasticizing unit including a plasticizing screw arranged displaceably and rotatably in a cylinder bore of the plasticizing cylinder, the method comprising:
- metering plastic granulate fed to the plasticizing unit depending on a desired backpressure length in the plasticizing unit, wherein the plasticizing unit is operated in underfed mode,
- wherein the plasticizing screw is underfed during the metering of the plastic granulate such that the screw return speed of the plasticizing screw is constant.
A method of influencing a backpressure length and/or a screw return speed in an axially extending plasticizing cylinder of a plasticizing unit for an injection moulding machine, the plasticizing unit including a plasticizing screw arranged displaceably and rotatably in a cylinder bore of the plasticizing cylinder, the method comprising:
- metering plastic granulate fed to the plasticizing unit depending on a desired backpressure length in the plasticizing unit, wherein the plasticizing unit is operated in underfed mode;
- and
- ascertaining the backpressure length using a sensor.
Dependencies are inferred from the claim text.