Method and apparatus for producing a finned tube from synthetic

Details Method and apparatus for producing a finned tube from synthetic Method and apparatus for producing a finned tube from synthetic

1988-07-29

1990-02-13

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Corrugating

264515, 264167, 264173, 4251331, 4253261, 425327, 425380, 425393, 425396, B29C 4720

Patent

active

049005030

ABSTRACT:
An apparatus for producing a finned tube from synthetic plastics material has a moulding chamber which moves in the direction of production. Molten synthetic plastics charge enters this moulding chamber from which fins are moulded one after another, the fins being in each case formed individually one after another. In order to ensure this procedural measure, there are constructed in the surface of the molten plastics material present in the moulding chamber annular raised portions with conveying surfaces trailing in the direcetion of production. Corresponding conveying grooves are constructed in the half moulds which bound the molding chamber. These measures ensure an accurate contour of the tube which is to be produced, ensuring that a reverse flow of molten plastics charge and its combustion will be prevented.

REFERENCES:
patent: 3188690 (1965-06-01), Zieg
patent: 3349156 (1967-10-01), Zieg
patent: 3776679 (1973-12-01), Hegler
patent: 3998579 (1976-12-01), Nordstrom
patent: 4212618 (1980-07-01), Hegler et al.
patent: 4319872 (1982-03-01), Lupke et al.
patent: 4710337 (1987-12-01), Nordstrom
patent: 4721594 (1988-01-01), Jakvenkyla

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