The option of an electric ejector is now also available for 270/320 S and 420/470 C ALLROUNDERS. A servo motor drives a planetary roller screw drive via a toothed belt, which moves a threaded spindle in the axial direction. This combination of a servo drive with an absolute stroke measurement system and high-precision mechanical transmission elements results in a position-regulated, highly precise, dynamic and above all load-independent movement, which can be performed simultaneously with the mould clamping movement, independently of the hydraulic system.
The precise synchronised, simultaneous movements of the ejector and clamp unit offer the advantage that the parts are not ejected in an uncontrolled manner in a horizontal direction, but drop almost vertically from the mould area. This is especially advantageous in the case of fast-running multi-cavity moulds as all parts can be demoulded evenly and in an absolutely reproducible manner. Consequently, the mould can be closed again rapidly, reducing cycle times even further. If robotic systems are employed for part removal, the ejector can also be used as a positioning axis owing to its precise position regulation, in order to ensure the accurate transfer of parts to the gripper. Further application options are the high-precision functions with the mould closed. Here too, position regulation will ensure that positions are reached with precision.