Method and apparatus for molding hollow articles

Details Method and apparatus for molding hollow articles Method and apparatus for molding hollow articles

1985-06-10

1987-09-01

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Female mold including tamping means or means utilizing mold...

Including means imparting diverse motion

249137, B29C 3926, B29C 4106

Patent

active

046906320

ABSTRACT:
A method of rotationally molding hollow articles from cross-linkable polymeric material wherein the mold and molding material are simultaneously revolved about two nonparallel axes while being heated to fuse and cross-link polymeric material. When the polymeric material is partially cross-linked the mold containing the hollow article is opened at at least one location to admit heated air circulated therethrough to facilitate cross-linking of the inner portion of the molded tubular article and produce a smooth inner surface therein. Also disclosed is apparatus for performing the molding method of the invention.

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