Coating drying technology and device thereof

Abstract

The invention discloses a coating drying technology and device thereof. The technology is used for drying a coating by combining a microwave drying technology with a circulating air-supply type drying technology, and a mode of heating the microwave dried coating from inside to outside is combined with a mode of drying the microwave dried coating with circulating air from outside to inside so that the purpose of more rapidly thoroughly drying the coating is achieved. The coating drying technology disclosed in the invention has the characteristics of uniform heating, high drying speed, high heat efficiency, good product quality and the like; and the circulating air can be used for immediately eliminating a solvent evaporated by the coating in a microwave heating process, thus the problems of local overheating caused by high microwave heating speed and incapability of immediately eliminating the solvent is avoided, the quality of the coating is ensured, and the thorough and uniform drying effect is obtained. The device has simple structure, can obtain better drying effect of the coating, and can improve the drying speed, thereby greatly saving the production period, improving the production efficiency and being capable of effectively avoiding microwave leakage.

Description

[0001] technical field [0002] The invention relates to a coating material production system, in particular to the drying treatment of the coating material, in particular to a coating drying technology and a device thereof. Background technique [0003] Now after the material coating production process, the wet coating needs to be baked and dried to drive off the solvent components in the coating to obtain a dry coating. The drying degree of the coating greatly affects the quality of the coating. [0004] There are many drying methods for coatings. At present, far-infrared radiation drying, heat conduction heat drum drying, double-sided air supply floating drying, conventional convective hot air drying and circulating hot air impact drying are currently used. [0005] Among them: the drying efficiency of far-infrared radiation is low, the drying is uneven, and it is easy to cause drying problems, so it has not been widely used; the drying speed of hot drum drying depends on...

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Problems solved by technology

[0005] Among them: the drying efficiency of far-infrared radiation is low, the drying is uneven, and it is easy to cause drying problems, so it has not been widely used; the drying speed of hot drum drying depends on the temperature of the hot drum, and the equipment is relatively heavy. It is mainly used for drying paper and cloth. , which is rarely used in coating drying; the unique double-sided air nozzle design of floating drying, the dried coated sheet is dried in a floating state under the action of air flow, and its drying efficiency is high, which has been obtained in the drying of paper coating machines Widely used, but when the coating substrate is made of metal, the coating cannot achieve the effect of double-sided drying, which will cause a great waste of energy and high cost; convection drying is a relatively traditional drying technology with simple equipment, but dry The efficiency is low and will gradually be replaced; circulating hot air impact drying is the mainstream drying method at the present stage, and current coating machines generally use electric heating up and down circulating air supply drying method, which is also one of them, and the efficiency of hot air drying is more common It should be high, and the energy saving effect is good, but because most of the circulating air drying technology is electric heating, when the thermocouple heats up the temperature in the oven, the temperature in the oven is difficult to be uniform, and when the coating enters the oven, the coating surface temperature It will rise rapidly, which will easily cause the surface conjunctiva and the inner layer is still wet, which cannot achieve the purpose of complete drying, making the surface of the coating film not bright enough and not uniform enough

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