Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1995-06-07
1997-06-17
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to heat or cool
26432815, B29C 4520
Patent
active
056394900
ABSTRACT:
The nozzle tip of an injection mold, which admits plastic at high injection pressures and temperatures to the gate of the mold, is locked on its seat within the nozzle housing by way of an axially elongated bridging key arrangement, to lock the nozzle tip to the nozzle housing and preclude backing-off movement of the nozzle tip into the gate. This prevents the nozzle tip from moving to block or partially block-off the gate. By securely locking the nozzle tip, potential damage to the mold gate is avoided. A singular keyway comprising aligned keyway portions may be provided, in mutual radial facing relation, to receive an elongated key therein. A differentiated nozzle tip locking embodiment provides two annular arrays of complementary keyway halves in mutual facing relation, forming potential insertion keyways in differentiated matching relation to provide one almost perfect match-up between two halves of a keyway, for insertion of a tubular spring pin as a key in locking relation therein. Adjacent pairs of potential keyway halves may be in progressive near alignment, so as to ensure a near-perfect keyway alignment match-up, thereby enabling the insertion of a key, such as a locking pin member, to maintain the nozzle tip in a screwed-home condition.
REFERENCES:
patent: 5269676 (1993-12-01), Gellert
patent: 5501594 (1996-03-01), Glozer et al.
Heitbrink Tim
Tradesco Mold Limited
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