Control of coating thickness of hot-dip metal coating

Details Control of coating thickness of hot-dip metal coating Control of coating thickness of hot-dip metal coating

1972-10-10

1976-01-13

Kendall, Ralph S.

Coating processes

With post-treatment of coating or coating material

Gas jet or blast mechanically treats coating

427433, 427436, 118 63, C23C 104, C23C 106, C23C 108

Patent

active

039326837

ABSTRACT:
Objectionable ripple formation in continuous hot-dip coating is avoided by using a single set of blowing nozzles and directing the gas streams downwardly against the strip at an angle between the strip and the center line of the gas stream of from about 0.degree. to about 45.degree., preferably from about 20.degree. to about 40.degree.. The technique is particularly useful at low line speeds of 150 feet per minute or less, especially at high coating weights of 1.5 ounces per square foot or more.

REFERENCES:
patent: 3406656 (1967-02-01), Patterson
patent: 3459587 (1969-08-01), Hunter et al.
patent: 3607366 (1971-09-01), Kurokawa
patent: 3681118 (1970-02-01), Ohama et al.

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