Method for blow molding and transfer molding thermoplastic mater

Details Method for blow molding and transfer molding thermoplastic mater Method for blow molding and transfer molding thermoplastic mater

1976-04-28

1978-01-24

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264155, 264163, 264296, B29C 1707

Patent

active

040704300

ABSTRACT:
A method of combining a transfer molding operation with a blow molding operation to form an article having wall sections of different thicknesses. The major portion of an extruded parison fed between a pair of mold sections and enclosed thereby is expanded into conformity with the cavity defined by the mold sections. An intermediate portion of the parison is directed into a cavity and displaced therefrom by opposed portions on the mold sections into a desired space to completely fill such spaced forming a wall section having a different wall thickness than the remainder of the article.

REFERENCES:
patent: 2541249 (1951-02-01), Hobson
patent: 3050773 (1962-08-01), Hagen
patent: 3317955 (1967-05-01), Schurman et al.
patent: 3821344 (1974-06-01), Peters

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