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US 6,190,157 B1Granted
Ejection device
AssigneeOtto Hofstetter AG, Werkzeug-und Formenbau
InventorsOtto Hofstetter, Luis Fernandez
Life of this patent
Estimating the term…
Abstract
The invention concerns an ejector for a discharging device for the removal of preforms which enables a partially cooled preform to be detached safely from a form tool and, on complete cooling, to be likewise removed from the discharging device safely and completely.
Claims11
A discharging tool comprising an ejection device for removing preforms from a mould tool,
- said discharging tool comprising:
- at least one base plate,
- a multitude of preform holders fastened to said at least one base plate, and
- a suction device for suctioning the preforms;
- and
- said ejection device comprising in each case:
- one ejection piston which is arranged within each preform holder and which is actuatable with the help of a pressurised air device, characterised in that the ejection piston comprises a piston head which in a floor region of the preform holder is displaceable in a pressure tight manner,
- wherein, for ejecting the ejection piston, between the piston head and a floor part of the preform holder there is arranged a pressure chamber which communicates with the pressurised air device via a pressurised air channel, and
- said piston head on the base plate side comprises a piston pin which is guided through the floor part in a pressure tight manner and which projects into a vacuum chamber which on one side communicates with a vacuumisation channel of the suction device and on another side is in connection with an inner space of the preform holder via an opening leading through the ejection piston.
6 more elements
An election device for use in a discharging tool comprising:
- an election piston arranged within a preform holder actuatable with the help of a pressurised air device, wherein said election piston comprises a piston head which in a floor region of the preform holder is displaceable in a pressure tight manner;
- a pressure chamber, disposed between the piston head and a floor part of the preform holder, which communicates with said pressurised air device via a pressurised air channel;
- and
- wherein said piston head, on a base plate side, comprises a piston pin which is guided through said floor part in a pressure tight manner and which projects into a vacuum chamber which on one side communicates with a vacuumisation channel of a suction device and on another side is in connection with an inner space of said preform holder via an opening leading through said ejection piston.
1 more element
Dependencies are inferred from the claim text.