Process and apparatus for the fabrication of a flat-shaped hollo

Details Process and apparatus for the fabrication of a flat-shaped hollo Process and apparatus for the fabrication of a flat-shaped hollo

1981-07-06

1983-04-26

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Corrugating

15624414, 264566, 264568, 4253261, 425336, 4253421, 425369, 425388, 425396, B29C 1707

Patent

active

043812767

ABSTRACT:
A process for the manufacture of a flat-shaped hollow body through the use of a forming die, wherein mold segment halves move continuously along a forming die and which, upon entering the forming die, are moved in an operating direction facing each other in pairs in a closed mold in tight proximity to each other. The mold is injected with warm thermoplastic hose stock which is shaped under vacuum action in the mold. In order to produce flat-shaped hollow bodies on a continuous basis the hose stock is subjected to vacuum action over at least a portion of its cross section even before mold segment halves are brought together and is pressed together accompanied by the formation of welds and the creation of hollow spaces over a portion of its cross section.

REFERENCES:
patent: 3035302 (1962-05-01), Lysobey
patent: 3099043 (1963-07-01), Held, Jr.
patent: 3235638 (1966-02-01), Winstead
patent: 3776679 (1973-12-01), Hegler
patent: 3812230 (1974-05-01), Takahashi
patent: 3976414 (1976-08-01), Hegler et al.
patent: 3981663 (1976-09-01), Lupke
patent: 4021178 (1977-05-01), Braun
patent: 4212618 (1980-07-01), Hegler

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