CS217417B1 - Drive system for casting machines - Google Patents

Abstract

An injection moulding machine comprises a mould closure unit 9 and an injection moulding unit 14 which includes a plasticizing device 5 with a plasticizing screw 13. A drive arrangement is provided which includes a variable-speed electric motor 1, open and closed loop control devices for controlling the speed of the motor 1, and one or two hydraulic pumps 2 acting as pressure flow generators for operating pressure flow loads of the mould closure unit 9 and of the injection moulding unit 14. The drive arrangement also includes force-transmitting machine elements, i.e. a clutch 3 and a transmission gearing 4, for transmitting a torque. During operation of the machine, the motor 1 rotates the plasticizing screw 13 either via the clutch 3 or via the clutch 3 and the transmission gearing 4, and simultaneously drives the two pumps 2. After the plasticizing stage the drive from the motor 1 may be parted from the screw 13 via the clutch 3 and used wholly for the injection stage, e.g. for damping the moulds. <IMAGE>

Description

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AHHOTAIJHH

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Φζγ. AND

Claims (4)

-Ή- OBJECT OF THE INVENTION A drive apparatus for casting machines comprising a variable speed electric motor, a device for controlling and regulating the speed of an electric motor, hydraulic pumps as an oil current generating current generator for driving oil extrusion current consumers in a closure and injection, and a driving transmission component of a torque transmission device characterized in that the variable-speed electric motor (1, 1 ') directly through the pull-out coupling (3, 3') or via the pull-out coupling (3, 3 ') in connection with other machine components Also, a hydraulic pump (2, 2z) is connected to the drive shaft of the electric motor (1, 1 ') to drive the current consumers of the extruder. 2. Drive apparatus for casting machines according to claim 1, characterized in that the variable speed electric motor (1), the hydraulic pumps (2), the necessary hydraulic devices for controlling and regulating the oil-dispensing current consumers, extendable the coupling (3) and the gearbox (4) together with the plastification node (5) and the injection cylinder (6) form the upper part (7) of the injection node (14). 3. Driving apparatus for casting machines according to claim 1, characterized in that the electric motor (1z), hydraulic pumps (2Z), hydraulic devices for controlling and regulating the oil extractors, withdrawable clutch (3Z), cardan shaft (12) ) and the V-belt transmission (11) 42- are installed in the lower part (10) of the injection node (14), the transmission case (4 *) being located in the upper part (7 *) of the injection node (14 *). 4. Drive apparatus for casting machines according to claim 1-3, characterized in that between the gear housing (4 *) located in the upper part (7 '*) and the cardan shafts 12) located in the lower part (10z) and predominantly implemented in the form of a spline shaft, there is a force closure that extends axially. Recognized by the invention on the basis of the results of an expert review by the Office of Invention and Patenting, Berlin, DB 1 drawing