Ejector apparatus with additional ejector force
AssigneeEngel Austria GmbH
InventorStefan Eppich
Life of this patent
Estimating the term…
Abstract
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.
Claims16
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;
- and
- a 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.
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;
- and
- a 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.
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;
- and
- a 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.
Dependencies are inferred from the claim text.