| 摘要 |
At least one of the subassemblies of an injection moulding machine for plastics which electromechanically convert a rotary movement into a straight movement, such as the closing unit, the nozzle moving unit, the injection unit, the ejector and the closing nozzle actuating unit, has a drive (P) with a planetary gear and a roller threaded spindle which is prevented from passively rotating backwards by restraining means. The rotary part of the drive with a planetary gear and a roller threaded spindle is movably mounted in the longitudinal direction of the spindle, against the force of elastic restoring means (29), and blocking means overcome the force of the restoring means (29) and secure against rotation the parts of the planetary roller threaded spindle by means of a reaction force generated by an external force. |
