Plasticizing unit with an electromotive spindle drive for an injection molding machine
AssigneeDemag Ergotech GmbH
InventorGeorg Michael Ickinger
Life of this patent
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Abstract
An actuating drive for a plasticizing unit of an injection molding machine is disclosed. The actuating drive includes a spindle drive with an electric motor and a control mechanism. An energy storage device is coupled with the spindle drive for force transmission therebetween. The energy storage device is loaded by the spindle drive in a return stroke phase and is unloaded in a forward feed phase, boosting the power of an electric motor. The actuator drive can be used, for example, for pulsating actuation of a mold ejector of the injection molding machine, significantly reducing the electrical energy consumption compared to conventional drives.
Claims7
An actuating drive for a plasticizing unit of an injection molding machine, comprising:
- a spindle drive having a stationary housing section and an electric motor with a drive element, the spindle drive further including a control mechanism arranged between the drive element and the housing section;
- and
- an energy storage device coupled with the spindle drive for force transmission therebetween,
- wherein the spindle drive loads the energy storage device in a return stroke phase of the spindle drive and unloads the energy storage device in a feed phase of the spindle drive, said unloading of the energy storage device boosting power of the electric motor, and
- wherein the control mechanism operates in parallel with the energy storage device to actively modify an effective actuating force of the energy storage device depending on a stroke position of the spindle drive.
Dependencies are inferred from the claim text.