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An ejector apparatus for an injection molding machine, includes ejector pins mounted to a movable ejector plate and drivable by a drive device for ejecting injection molded parts from a cavity of an injection molding tool. The ejector plate is displaceable by the drive device with a given normal eje

An ejector apparatus for an injection molding machine, includes ejector pins mounted to a movable ejector plate and drivable by a drive device for ejecting injection molded parts from a cavity of an injection molding tool. The ejector plate is displaceable by the drive device with a given normal ejector force acting on an injection molded part. There is provided a reinforcing mechanism which, when there is a jammed injection molded part, reinforces the ejector force acting on the injection molded part to an increased additional ejector force for ejecting the jammed injection molded part above the given normal ejector force which can be or is made available by the drive device.

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1. An ejector apparatus for an injection molding machine, comprising: ejector pins mounted to a movable ejector plate;a drive device for driving said ejector pins to eject injection molded parts from a cavity of an injection molding tool, said drive device being configured to displace said ejector p

1. An ejector apparatus for an injection molding machine, comprising: ejector pins mounted to a movable ejector plate;a drive device for driving said ejector pins to eject injection molded parts from a cavity of an injection molding tool, said drive device being configured to displace said ejector plate with a given normal ejector force acting on an injection molded part; anda reinforcing mechanism configured to reinforce the ejector force acting on said injection molded part when an injection molded part becomes jammed so as to generate a greater ejector force greater than the given normal ejector force and thereby eject the jammed injection molded part;wherein, in a first operating mode, said drive device generates the normal ejector force, and in a second operating mode, a motor of said reinforcing mechanism presses reinforcing plates against said ejector plate. 2. The ejector apparatus of claim 1, wherein the greater ejector force is at least double the normal ejector force. 3. The ejector apparatus of claim 1, wherein said motor of said reinforcing mechanism presses reinforcing plates against said ejector plate via an auxiliary spindle. 4. The ejector apparatus of claim 1, wherein said motor of said reinforcing mechanism drives two auxiliary spindles via a belt transmission, said auxiliary spindles being arranged substantially parallel to a main spindle of said drive device and being mounted to said reinforcing plates. 5. The ejector apparatus of claim 1, wherein said reinforcing mechanism includes a lever arrangement connected to said drive device and said ejector plate, said lever arrangement being configured such that a change in angular position of individual levers of said lever arrangement relative to each other reinforces the normal ejector force to generate the greater ejector force. 6. The ejector apparatus of claim 5, wherein said lever arrangement is pivotably connected to a main spindle driven by said drive device and to said ejector plate. 7. The ejector apparatus of claim 1, wherein said reinforcing mechanism includes: a lever arrangement; anda spring arranged between a main spindle driven by said drive device and said ejector plate, a spring force of said spring being set above the normal ejector force;wherein, in a case of a counteracting force occurring due to a jammed injection molded part and acting on the ejection movement of said ejector plate, the spacing between said main spindle and said ejector plate is reduced by compression of said spring and angles of levers of said lever arrangement relative to each other are displaced such that the normal ejector force of said ejector plate becomes the greater ejector force for ejecting the jammed injection molded part. 8. An injection molding machine comprising said ejector apparatus of claim 1. 9. An ejector apparatus for an injection molding machine, comprising: ejector pins mounted to a movable ejector plate;a drive device for driving said ejector pins to eject injection molded parts from a cavity of an injection molding tool, said drive device being configured to displace said ejector plate with a given normal ejector force acting on an injection molded part; anda reinforcing mechanism configured to reinforce the ejector force acting on said injection molded part when an injection molded part becomes jammed so as to generate a greater ejector force above the given normal ejector force and thereby eject the jammed injection molded part, said reinforcing mechanism including a motor for pressing reinforcing plates against said ejector plate;wherein said motor of said reinforcing mechanism drives two auxiliary spindles via a belt transmission, said auxiliary spindles being arranged substantially parallel to a main spindle of said drive device and being mounted to said reinforcing plates. 10. The ejector apparatus of claim 9, wherein the greater ejector force is at least double the normal ejector force. 11. The ejector apparatus of claim 9, wherein, in a first operating mode, said drive device generates the normal ejector force, and in a second operating mode, said motor of said reinforcing mechanism presses said reinforcing plates against said ejector plate. 12. The ejector apparatus of claim 9, wherein said reinforcing mechanism includes a lever arrangement connected to said drive device and said ejector plate, said lever arrangement being configured such that a change in angular position of individual levers of said lever arrangement relative to each other reinforces the normal ejector force to generate the greater ejector force. 13. The ejector apparatus of claim 12, wherein said lever arrangement is pivotably connected to a main spindle driven by said drive device and to said ejector plate. 14. The ejector apparatus of claim 9, wherein said reinforcing mechanism includes: a lever arrangement; anda spring arranged between a main spindle driven by said drive device and said ejector plate, a spring force of said spring being set above the normal ejector force;wherein, in a case of a counteracting force occurring due to a jammed injection molded part and acting on the ejection movement of said ejector plate, the spacing between said main spindle and said ejector plate is reduced by compression of said spring and angles of levers of said lever arrangement relative to each other are displaced such that the normal ejector force of said ejector plate becomes the greater ejector force for ejecting the jammed injection molded part. 15. An injection molding machine comprising said ejector apparatus of claim 9. 16. An ejector apparatus for an injection molding machine, comprising: ejector pins mounted to a movable ejector plate;a drive device for driving said ejector pins to eject injection molded parts from a cavity of an injection molding tool, said drive device being configured to displace said ejector plate with a given normal ejector force acting on an injection molded part; anda reinforcing mechanism configured to reinforce the ejector force acting on said injection molded part when an injection molded part becomes jammed so as to generate a greater ejector force greater than the given normal ejector force and thereby eject the jammed injection molded part;wherein said reinforcing mechanism includes a lever arrangement connected to said drive device and said ejector plate, said lever arrangement being configured such that a change in angular position of individual levers of said lever arrangement relative to each other reinforces the normal ejector force to generate the greater ejector force.