| At konvektsionnom a method of drying the paint heats up at the expense of heat of air. Thus on a paint surface the crust interfering a free exit of products of evaporation from the bottom coat layers that extends drying process is gradually formed.
The Thermoradiating method of drying is based on that phenomenon, that infra-red beams, getting on a subject absorbing radiation, heat up it. Infra-red heating is given more than heat, than konvektsionnaja by drying, thus the painted surface (metal, a tree) products, and then and a paint coat at the expense of absorption of radiant energy at first heats up. Covering hardening begins with an inside layer and extends gradually on the external. Heating goes and at the expense of heat transfer by disappearing products of evaporation; drying process at thermoradiating drying is sharply accelerated.
Lighting lamps nakalivanija can be the Source of infra-red beams. Uniform distribution of energy is better provide lamps with a mirror reflector or usual lamps nakalivanija with a reflector. Industrially application of lamps nakalivanija is limited, as they are short-lived, often leave out of operation and require periodic cleaning of a surface and non-uniformly heat up a product.
The Source of infra-red beams are also firm bodies, nagretye to 400-500°С. Such beams get into a coat layer more deeply and provide the fast; and uniform drying of a paint coat. Besides, teploizluchateli various designs serve longer lamps and is more practical them.
To heating teploizluchatelej apply an electricity and gas. In the first case heat-radiating panels represent pig-iron plates with the steel tubes filled in in them which the spiral isolated from a tube plavlenoj okisju of magnesium keeps within nihromovaja. Panels from iron sheets in the form of a box with tubular to heaters inside are produced also. The Gorki automobile factory has developed the panel in the form of the bent metal reflector - a reflector with three tubular heaters.
Sections
the Device of the thermoradiating dried
Sources of infra-red radiation
Speed of drying
chamber Walls
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