Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Corrugating
Patent
1988-04-28
1989-09-19
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Corrugating
264167, 2642093, 4253261, 425327, 425393, 425396, B29C 4786
Patent
active
048679283
ABSTRACT:
This invention relates to an apparatus and a method for the production of outwardly ribbed, plastic pipes. The apparatus includes a core around which a plasticized material is pressed from a nozzle. A kernel having an essentially constant diameter is positioned at the terminal end of the core for a smooth inner face of the pipe. The outer face of the pipe is ribbed by grooves of axially displaceable chill moulds. The end zone of the kernel is provided for the cooling of the inner face of the pipe. In known apparatuses the grooves of the chill moulds are often filled incompletely and the inner face of the pipe becomes uneven on account of air bubbles, for instance. These disadvantages are avoided by heating an initial zone of the kernel for heating the inner face of the pipe and by shaping the surface of the initial zone to slightly expand conicallly in the production direction.
REFERENCES:
patent: 3280430 (1966-10-01), Antobus
patent: 3872893 (1975-03-01), Roberts
patent: 3994646 (1976-11-01), Hauck
patent: 3998579 (1976-12-01), Nordstrom
patent: 4226580 (1980-10-01), Lupke et al.
patent: 4365948 (1982-12-01), Chaplain
patent: 4510013 (1985-04-01), Lupke et al.
patent: 4534923 (1985-08-01), Lupke
patent: 4591323 (1986-05-01), Boen
patent: 4710337 (1987-12-01), Nordstrom
Carlsson Ingemar
Jarvenkyla Jyri
Thurlow Jeffery
Uponor N.V.
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