Apparatus for making tubing from thermoplastic synthetic materia

Details Apparatus for making tubing from thermoplastic synthetic materia Apparatus for making tubing from thermoplastic synthetic materia

1976-01-12

1977-05-03

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

425326B, 425392, 425396, 425371, B29C 1700, B29D 722

Patent

active

040211789

ABSTRACT:
A tubular parison of synthetic plastic material in thermoplastic condition is extruded into a travelling mold wherein it is formed into a corrugated tube. The travelling mold is formed when cooperating mold sections of two endless strings of such mold sections move together and travel for some distance in a straight path before moving apart again. Each mold section has front and rear guide rollers which travel in guide channels that are so configurated as to impart to the mold sections the aforementioned movements toward and away from each other.

REFERENCES:
patent: 2866230 (1958-12-01), Holte
patent: 3035302 (1962-05-01), Lysobey
patent: 3286305 (1966-11-01), Seckez
patent: 3732046 (1973-05-01), Martin et al.
patent: 3776679 (1973-12-01), Hegler
patent: 3834853 (1974-08-01), Bequet et al.
patent: 3881851 (1975-05-01), Allanic et al.

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