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US 6,120,277 AGranted
Hybrid injection molding machine
AssigneeCincinnatti Milacron Inc.
InventorM. Barr Klaus
Life of this patent
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AssigneeCincinnatti Milacron Inc.
InventorM. Barr Klaus
Estimating the term…
An electro-mechanical drive apparatus uses a single variable speed motor, two one-way clutches, a hydraulic pump stack and a hydraulic accumulator to provide both hydraulic power for linear motion axes and rotation of a driven element of an electromechanical drive system in an injection molding machine. When engaged, the first one-way clutch couples the drive motor to the pump stack, while the second one-way clutch couples the motor to the driven element. During rotation of the drive motor in a forward direction, (a) the first one-way clutch engages, rotating the shaft of the hydraulic pump stack to power the machine's hydraulic systems and charge an accumulator; and (b) the second one-way clutch slips. When the drive motor is rotated in a reverse direction, (a) the second one-way clutch engages, rotating the driven element, and (b) the first one-way clutch slips.
An injection molding machine comprising at least one hydraulically operated system, an injection unit including a feed screw capable of rotational and translational movement within a barrel, a hydraulic pump, a variable speed electric drive motor, and transmission means for alternately transmitting power from the drive motor to (a) rotate the feed screw and (b) activate the hydraulic pump, such that operation of the drive motor in one direction rotates the feed screw to plasticize material in the barrel of the injection unit and operation of the drive motor in an opposite direction activates the hydraulic pump to enable operation of the hydraulic systems of the injection molding machine.
A molding machine having at least one hydraulically operated system, an injection unit including a feed screw rotatably and translatably carried in a barrel, a hydraulic pump, a variable speed electric drive motor, and transmission means for alternately transmitting power from the drive motor to the feed screw and hydraulic pump, the transmission means comprising:
An injection molding machine comprising at least one hydraulically operated system, at least one electro-mechanical drive system including a variable speed electric drive motor, a hydraulic pump, and transmission means for alternately transmitting power from the drive motor to (a) rotate a driven element in the electro-mechanical drive system and (b) activate the hydraulic pump, such that operation of the drive motor in one direction activates the electromechanical drive system and operation of the drive motor in an opposite direction activates the hydraulic pump to enable operation of the hydraulic systems of the injection molding machine.
Dependencies are inferred from the claim text.