Mold for plastic bottles

Details Mold for plastic bottles Mold for plastic bottles

1991-03-21

1993-06-08

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

249135, 425812, B29C 3310, B29C 4962

Patent

active

052177297

ABSTRACT:
A mold for plastic bottles is designed to have an internal arithmetic average of roughness height of a cavity-forming wall to be less than 0.25 .mu.m. The mold has air passages for decompressing air in the cavity and absorbing the air between the wall and a parison expanded by blowing into it. The mold has air suction passages around the mouth portion of the mold and between the main body and the bottom portion of the mold. The surface of the bottle and the molds have so little air stagnated between the mold and the bottle wall that the resulting bottle results in a high gloss.

REFERENCES:
patent: 3597793 (1971-08-01), Weiler et al.
patent: 4034036 (1977-07-01), Farrell
patent: 4120924 (1978-10-01), Rainville
patent: 4304826 (1981-12-01), Kendall et al.
patent: 4353964 (1982-10-01), Grimm et al.
patent: 4699585 (1987-10-01), Giese et al.
patent: 4849154 (1989-07-01), Masumoto
patent: 4936893 (1990-06-01), Yamada et al.

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