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.
Claims9
An actuating drive for a plasticizing unit of an injection molding machine, comprising:
- a spindle drive operatively connected to the plasticizing unit and having a stationary housing section and an electric motor with a drive element, said spindle drive moving between a first end position corresponding to a feed phase of the spindle drive and a second end position corresponding to a return stroke phase of the spindle drive;
- and
- an energy storage device coupled with the spindle drive for force transmission therebetween, said energy storage device receiving energy from the spindle drive in the return stroke phase and transferring energy to the spindle drive in the feed phase;
- said transferred energy boosting power of the electric motor,
- wherein the spindle drive includes a control mechanism arranged between the drive element and the housing section and engaging with the drive element to actively control the force transmitted between the energy storage device and the spindle drive depending on a stroke position of the spindle drive.
Dependencies are inferred from the claim text.