Production of pipes insulated with foams

Details Production of pipes insulated with foams Production of pipes insulated with foams

1998-03-17

2000-01-04

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 466, 264 469, 264268, B29C 4406, B29C 4412

Patent

active

060106506

ABSTRACT:
A process for producing pipes insulated with foams comprises providing, between an inner carrier pipe and an outer pipe arranged parallel thereto, a holder which is provided with at least one aperture and is mounted so that it can be moved axially and positions the carrier pipe in the outer pipe and introducing into the vacant space between the two pipes, via the aperture(s) in the holder, a mixture for the preparation of foams, where during the introduction of the mixture, the holder moves in an axial direction with respect to the outer pipe and the carrier pipe, then after the mixture is charged, it is reacted to give the foam and the holder and, if desired, the outer pipe are removed.

REFERENCES:
patent: 3444279 (1969-05-01), Dost
patent: 3492029 (1970-01-01), French et al.
patent: 3793411 (1974-02-01), Stonitsch et al.
patent: 3935632 (1976-02-01), Maxson
patent: 4009732 (1977-03-01), Martin et al.
patent: 4240850 (1980-12-01), Arntz
patent: 4522578 (1985-06-01), Martin, Jr. et al.
patent: 4564487 (1986-01-01), Bennett
patent: 4956133 (1990-09-01), Payne
Plast Verarbeiter, Kontinuierlich Schaeumen, Huthig GmbH, Heidelberg (undated).

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