Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With product ejector
Patent
1996-05-14
1998-07-07
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With product ejector
264318, 264334, 425809, 425DIG58, B29C 4544
Patent
active
057765219
ABSTRACT:
An apparatus for forming a moulded article includes a stationary mould core with an external threaded surface. A female mould surrounds a portion of the mould core including the threaded surface in a mould closed condition to define a mould cavity between the mould core and the female mould. Molten plastic is injected into the mould cavity to form the moulded article. A rotatable sleeve surrounds the mould core and engages with the moulded article formed in the mould cavity. The sleeve carries a gear wheel which meshes with a pinion. A rack is associated with the pinon and is moveable linearly to impart rotation of the pinion and in turn the sleeve. A lead screw on the sleeve engages a lead screw nut to cause the sleeve to displace axially along the mould core as the sleeve rotates. Lugs on the sleeve engages the moulded article and causes it to rotate with the sleeve so that the moulded article unscrews from the mould core allowing it to be ejected from the apparatus.
REFERENCES:
patent: 5383780 (1995-01-01), McCready et al.
patent: 5421717 (1995-06-01), Hynds
patent: 5518679 (1996-05-01), Junk
Burrows Mark W.
Wright John B.
Heitbrink Tim
Zygo Mould Limited
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