Infra-red emitter heats coatings very rapidly
Water-cooled, short wave, infra-red emitter, which offers very high power densities, suits finishing operations, which require very rapid heating and for the heating of very thin coatings.
A new water-cooled, short wave, infra-red emitter, which offers very high power densities, is now available from Heraeus Noblelight, of Neston. It is particularly suitable for finishing operations which require very rapid heating and for the heating of very thin coatings. The new short wave emitter is based on the well-proven, Heraeus twin tube design and features new materials and innovative water cooling, which allow very high surface power densities of up to 1.2MW/m2 to be achieved.
(This compares with maximum surface power densities of a few hundred kW/mý for conventional infra-red emitters.) Because of the rapid heat-up rates, the water-cooled emitter can generate temperatures greater than 1000degC in the product to be heated within seconds.
The emitter has been developed to find application in areas such as drying thin, water-based dispersions in coil coating in the steel industry, heating glazings in the manufacture of roof tiles, rapid heating of metal plates to temperatures of around 900degC, applying heat and coatings under vacuum and drying varnishes on wooden boards.
Currently, the new emitters, which have an operating life of around 1500 hours, are available in four models, with heated lengths of 150mm, 310mm, 530mm and 800mm and power ratings from 2.9kW to 15kW.
Other lengths and powers can be manufactured to order.
Every emitter is fitted with gold reflectors to maximise the heat radiation and can be used with all conventional voltages.
The required cooling is 2-3 litres/min for emitters with heated lengths less than 500mm and 4-6 litres/min for emitters with heated lengths greater than 500mm.
Heraeus Noblelight, part of the multi-national Heraeus Group, specialises in the production and application of high quality energy sources covering the entire electromagnetic spectrum, from ultra-violet to infra-red.
It has over 40 years experience in infra-red technology and offers the expertise, products and systems to provide efficient and effective solutions to drying, heating and curing problems throughout industry.
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