Device for safeguarding an open position of the closing unit of an injection molding machine
AssigneeKrauss-Maffei Kunststofftechnik GmbH
InventorsMichael Zellerohr, Friedrich Staudacher
Life of this patent
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Abstract
Injection molding machines must be provided with devices which ensure that the mold mounting plates when in open position cannot inadvertently close, wherein the conventional safety devices include a toothed locking bar disposed between two mold mounting plates and are provided with a ratchet mechanism, but which obstructs accessibility in the space between the two mold mounting plates, so that according with the present invention a blocking unit is disposed outside the space between two mold mounting plates for engagement of the drive unit of the closing unit to thereby prevent an inadvertent closure.
Claims13
A safety device for safeguarding a closing unit of an injection molding machine from inadvertently executing a closing movement, said safety device comprising:
- a mechanical blocking unit, interacting with a drive unit for opening and closing the closing unit and disposed outside a space between mold mounting plates of the closing unit;
- and
- an activation mechanism automatically operating the blocking unit, when a protective door to the closing unit is opened for securement of the mold mounting plates of the closing unit in an open position.
Dependencies are inferred from the claim text.