Patent ID: 7112056
Filing Date: 2006-09-26
Classification: B29C

Abstract:
1. 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.