Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – Mold having movable core or movable pin
Patent
1996-04-24
1998-04-07
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
Mold having movable core or movable pin
264318, 425DIG58, B29C 4544
Patent
active
057361738
ABSTRACT:
A preform injection mould includes an elongate mould core cooperating with a female mould and a neck ring in a manner to define a mould cavity therebetween. An injection nozzle in the female mould allows molten plastic to be injected into the mould cavity so that a preform moulded article may be formed. The neck ring is constituted by a pair of mating halves which can be separated laterally with respect to the longitudinal axis of the mould core. A taper sleeve surrounds the mould core beneath the neck ring. The neck ring halves are secured to diametrically opposed slides to facilitate lateral separation of the neck ring. A pair of slide taper locks contact a respective one of the slides to inhibit lateral movement of the slides and to back up the neck ring when injection mould is in a mould closed position. An annular formation is formed on the upper surface of the neck ring and is accommodated by a complementary recess formed in the bottom of the female mould. The mating inclined surfaces of the female mould and the annular formation constitute an upper taper lock which is backed up by a cavity plate. An annular formation is provided on the upper surface of the taper sleeve and is accommodated by a complimentary recess formed in the bottom of the neck ring. The mating inclined surfaces of the taper sleeve and neck ring constitute a lower taper lock. Since a portion of the neck ring constitutes the female taper of the lower taper lock, the lower taper lock is backed up by the slide taper locks through the slides allowing the cross-sectional area of the neck ring to be reduced.
REFERENCES:
patent: 4889480 (1989-12-01), Nakamura et al.
patent: 5531588 (1996-07-01), Brun
Burrows Mark W.
Kovac Walter
Wright John B.
Heitbrink Tim
Zygo Mold Limited
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