Method of blow molding an all plastic drum and compression moldi

Details Method of blow molding an all plastic drum and compression moldi Method of blow molding an all plastic drum and compression moldi

1978-06-28

1979-10-09

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264541, 425525, B29C 1707

Patent

active

041706234

ABSTRACT:
An all plastic tubular drum is blow molded into the selected configuration from an extruded parison. The parison is provided with at least two spaced circumferentially extending thickened sections. These thickened sections are captured in a compression mold cavity during the blow molding cycle. Thereafter the captured thickened sections are compression molded into outwardly extending projections, undercuts, reinforcing gussets, or the like.

REFERENCES:
patent: 3050773 (1962-08-01), Hagen
patent: 3159697 (1964-12-01), Tocci
patent: 3217360 (1965-11-01), Mason et al.

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