Multiple mold for producing elongate tubular articles

Details Multiple mold for producing elongate tubular articles Multiple mold for producing elongate tubular articles

1978-01-27

1980-01-22

Arnold, Donald J.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

Plural mold cavities

249110, 425581, B29F 100

Patent

active

041848365

ABSTRACT:
A central chamber of a mold body, communicating through a heated nozzle with a supply channel, has a plurality of peripherally spaced injection orifices opening into respective cavities for the molding of tubular articles such as shells of disposable syringes, each cavity being defined by a generally cylindrical recess in the mold body paralleling the nozzle axis and a core received with all-around clearance in that recess. Each cavity has two elongate sections of larger and smaller diameter interconnected by a wider annular gap at the level of the injection orifices; the axial width of the annular gap progressively diminishes with increasing distance from the corresponding orifice.

REFERENCES:
patent: 2339443 (1944-01-01), Wilson
patent: 2799435 (1957-07-01), Ablanalp
patent: 3159878 (1964-12-01), Scott, Jr. et al.
patent: 3339239 (1967-09-01), Peck
patent: 3351691 (1967-11-01), Wilford
patent: 3663145 (1972-05-01), Teraoka
patent: 3897929 (1975-08-01), Hartmann

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