Machine for processing synthetic materials
AssigneeEngel Maschinenbau Gesellschaft m.b.H.
InventorsHelmut Naderhirn, Herbert Gruber
Life of this patent
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Abstract
An injection moulding machine with a vertically movable mould-clamping plate, an electrical drive motor for the movable mould-clamping plate. A control unit for the drive motor, a machine control unit and a safety device to prevent unintentional movement of the movable mould-clamping plate are also provided. The machine control unit activates the retaining device when a movement of the movable mould-clamping plate is indicated without a corresponding drive signal.
Claims7
An injection molding machine for processing synthetic materials having a vertically movable mold-clamping plate, an electrical drive motor for moving the movable mold-clamping plate, a motor control unit for the drive motor, the drive motor producing a drive signal when moving the movable mold-clamping plate, a machine control unit and a safety device means for preventing unintentional movement of the movable mold-clamping plate, the safety device means comprising at least one retaining device for controllably preventing movement of the movable mold-clamping plate the machine control unit being connected to the drive motor and a movement sensor being connected with the machine control unit, the machine control unit including means for activating the at least one retaining device to prevent movement of the movable mold-clamping plate when a movement of the movable mold-clamping plate is indicated to the machine control unit by the movement sensor in the absence of a corresponding drive signal from the drive motor.
Dependencies are inferred from the claim text.