Ejector device for an injection molding machine for plastics
AssigneeDemag Ergotech GmbH
InventorHolger Schmidt
Life of this patent
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Abstract
The invention relates to an ejector device for an injection-molding machine for plastics, having at least one ejector pin, which can be moved toward the mold and away from the latter through the center of a moveable die clamping plate by an actuator. In this arrangement, the actuator provided is a linear motor (21), which is arranged outside the central axis (I) on the moveable clamping plate (11) , and bar-shaped force-transmission elements (30), by means of which the linear motor can be brought into operative connection with the ejector pin (41), are provided.
Claims22
An ejector device for ejecting a molding from the dies of an injection molding machine for plastic, said machine having a moveable die clamping plate with a central axis, said ejector device comprising:
- at least one ejector pin which can be moved toward and away from the dies through the moveable die clamping plate,
- a linear motor mounted on the moveable die clamping plate outside the central axis of the moveable die clamping plate for moving the ejector pin toward and away from the dies, said linear motor having an axis of motion,
- a two-armed lever having a pair of opposed ends, one of said ends being connected to the ejector pin,
- a compression link connecting the other of said ends to the linear motor, and
- a tension link connecting the two-armed lever to the moveable clamping plate between said ends,
- whereby said linear motor can push on said compression link so that said two-armed lever pulls on said tension link so that said ejector pin can eject a molding from said moveable die clamping plate.
An ejector device for ejecting a molding from the dies of an injection molding machine for plastic, said machine having a moveable die clamping plate with a central axis, said ejector device comprising:
- at least one ejector pin which can be moved toward and away from the dies through the moveable die clamping plate,
- a linear motor mounted on the moveable die clamping plate outside the central axis of the moveable die clamping plate for moving the ejector pin toward and away from the dies, said linear motor having an axis of motion,
- a bracket fixed to said moveable die clamping plate,
- a two-armed lever having a pair of opposed ends, one of said ends being pivotably connected to said bracket,
- a tension link connecting the other of said ends to said linear motor, and
- a compression link connecting the two-armed lever to the ejector pin between said ends,
- whereby said linear motor can pull on said tension link so that said two-armed lever pushes said compression link so that said ejector pin can eject a molding from said moveable die clamping plate.
Dependencies are inferred from the claim text.