Tubular container molding method and apparatus

Details Tubular container molding method and apparatus Tubular container molding method and apparatus

1983-05-23

1985-01-29

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

249 83, 249124, 264339, 425112, 425117, 425127, 425129R, B29C 500, B29D 3100, B29F 110

Patent

active

044965133

ABSTRACT:
A tubular container molding method includes the steps of inserting a core block having an upwardly projected annular flange at the top end into a preformed tubular member, closing the mold and thereby pressing an upper marginal portion of the tubular member against a cavity mold and bending inwardly such upper marginal portion to form a shoulder portion of the container, urging the inwardly bent marginal portion against an interior surface of the cavity mold by the annular flange to hold the shoulder portion between the core block and the cavity mold, and injecting molten resin into an air gap defined between the core block and the cavity mold, thereby molding conical and neck portions of the container integrally with the shoulder portion.

REFERENCES:
patent: 2386498 (1945-10-01), Ostrander
patent: 2485885 (1949-10-01), Hoopes
patent: 3074837 (1963-01-01), Flax
patent: 3330006 (1967-07-01), Jenkins

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