Manifold in substantial alignment with plasticizer

Details Manifold in substantial alignment with plasticizer Manifold in substantial alignment with plasticizer

1977-04-01

1978-09-05

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Including means to prepare parison

425534, 425572, B29P 2302, B29F 106, B29B 114

Patent

active

041116356

ABSTRACT:
Multi-cavity molds, such as used for injection blow-molding apparatus, have manifolds through which molten plastic is supplied from a plasticizer to the individual mold cavities. Some plastic molding materials, referred to as "heat-sensitive," deteriorate if they remain in the manifold for any substantial length of time. This manifold is constructed with its cross-section and branch passages correlated in such a way that there is no space in the manifold where plastic can accumulate out of the stream of feeding plastic. By keeping the plastic moving, in all parts of the manifold during each injection operation, deterioration of heat-sensitive plastic in the manifold is avoided.

REFERENCES:
patent: 3577291 (1971-05-01), Uchida
patent: 3616491 (1971-11-01), Vollers
patent: 3704723 (1972-12-01), Wheaton et al.
patent: 3940223 (1976-02-01), Farrell
patent: 3940224 (1976-02-01), Armour

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