Steel-pipe coating apparatus

Details Steel-pipe coating apparatus Steel-pipe coating apparatus

1977-08-05

1980-05-27

McIntosh, John P.

Coating apparatus

Immersion or work-confined pool type

Work extending through pool-confining wall area

425113, 425381, 425465, B05C 502

Patent

active

042044960

ABSTRACT:
A steel-pipe coating process and an apparatus therefor, in which molten resin is extruded through a cross-head die connected to an extruder, into a tubular shape, in a manner to cover or coat the surface of a steel pipe. In this apparatus, a resin outlet in the extruder is communicated through the medium of a resin guide member with a resin inlet of the cross head die. The extruder is secured to a fixed frame, while the cross head die is supported by the fixed frame in a reciprocating manner through the medium of a reciprocating drive member within a given stroke in the direction of the steel pipe being fed. Thus, when the cross head die is reciprocated by means of the reciprocating drive member, the relative speed of the steel pipe being fed to the cross head die being reciprocated may be intermittently varied, whereby the amount of resin being extruded through a cylindrical outlet of the cross head die around the surface of the steel pipe may be intermittently varied.

REFERENCES:
patent: 2892441 (1959-06-01), Stearns
patent: 3690288 (1972-09-01), Main et al.
patent: 3692447 (1972-09-01), Nelson
patent: 4082585 (1978-04-01), Kanotz et al.

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