Method of making a blown hollow article having a ribbed interior

Details Method of making a blown hollow article having a ribbed interior Method of making a blown hollow article having a ribbed interior

1978-08-07

1979-10-09

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264530, 264534, B29C 1707

Patent

active

041706226

ABSTRACT:
A method is disclosed for reinforcing hollow articles, such as bottles, blow molded from a heated thermoplastic material. A hollow parison is preformed with concave grooves in its exterior surface and corresponding ribs on its interior surface at locations in which the finished article is to be reinforced. The parison is then blow molded into the finished article. The blowing pressure and the temperature of the thermoplastic material collapse and fuse the concave grooves to form solid reinforcement ribs located inside the article while the exterior of the article has a rib-free surface defined by the blow mold.

REFERENCES:
patent: 3398428 (1968-08-01), Fuerst et al.
patent: 3956441 (1976-05-01), Uhlig

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