Injection blow molding method for hollow article having openings

Details Injection blow molding method for hollow article having openings Injection blow molding method for hollow article having openings

1973-11-29

1978-07-18

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264161, 264163, 425527, 425533, B29C 1707

Patent

active

041016181

ABSTRACT:
Injection blow molding method for a hollow article having openings at both ends, in which said method comprises the steps of: forming a parison having openings at both ends by injecting plastic material into the cavity of an injection mold which is provided with a stationary core member and a movable core member as disposed on the same axis, shifting said parison from said injection mold to said blow mold together with a movable core member, closing the remaining open end of said parison by a closing core member, and blowing said parison within said blow mold to produce a molded article having openings at both ends.

REFERENCES:
patent: 598224 (1898-02-01), Hays
patent: 1127381 (1915-02-01), Byrnes

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