Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Mold motion or position control
Patent
1984-08-01
1986-06-03
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Mold motion or position control
264 405, 4254512, 425590, 425DIG223, B29C 4568
Patent
active
045927146
ABSTRACT:
A mold closing unit of an injection molding machine has a threaded spindle which is engaged with the movable mold clamping plate of the machine via a spindle nut. The spindle is attached to the stationary mold clamping plate of the machine in a freely pivotable manner, and is connected with a stepping motor by means of a coupling. The stepping motor is controlled depending on a specified speed pattern as a function of the distance between the mold halves of the mold clamping plates. The valve body of a 4/2-way valve engages the spindle for relative axial movement and controls the hydraulic operating medium for the mold closing unit. A switch is arranged in the casing of the valve which can be triggered by the coupling and which actuates, for example, an indication system when a mold closure security error occurs.
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Berger Lahr, entitled "DIVI-STEP Type SST 088/SST 093".
Hartmann and Laemmle KG, "Electro-Hydraulic Linear Amplifier LVS", 10th Edition 1977.
Fortenberry J.
Klockner-Werke Aktiengesellschaft
Woo Jay H.
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