Production of polymer-coated steel tubing

Details Production of polymer-coated steel tubing Production of polymer-coated steel tubing

1975-08-14

1976-06-29

Hinson, Harrison L.

Metal working

Plural diverse manufacturing apparatus including means for...

Binding or covering and cutting

B21B 1500

Patent

active

039655512

ABSTRACT:
Lengths of polymer-coated tubing are continuously produced from steel strip by roll-forming and welding at a fast rate of speed. The welded tubing is sized, cleaned and heated to raise its temperature to that desired for applying a polymeric coating. After coating, the tubing is heated to a desired baking temperature and then cooled. The tubing is unsupported from a location upstream of the coating station until cooled. Elongated endless belts grip the tubing over a longitudinal distance of at least about 2 feet and pull the tubing in a controlled manner to maintain the tubing in precise spatial location throughout its heating, coating and baking.

REFERENCES:
patent: 2782743 (1957-02-01), Kennedy
patent: 3579772 (1971-05-01), Coad
patent: 3639970 (1972-02-01), Larkin
patent: 3667095 (1972-06-01), Ostrowski

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