company news about Curing furnaces in dusting equipment - analysis

In recent years, with the rapid development of China's large-scale infrastructure construction and automation industry, it has greatly promoted the development of spraying equipment industry. Powder spraying equipment is very important in metal surface spraying, which can effectively improve the service life and beauty of the workpiece, and meet the requirements of environmental protection. The rise of China's manufacturing industry in the powder spraying equipment manufacturing industry has a history of several decades, and the world market is mainly concentrated in Africa, Europe, Asia, the Americas and other places. Since its establishment, Xinkaisheng has served thousands of enterprises through continuous research and development and manufacturing. On the basis of fully absorbing foreign advanced powder spraying equipment technology, we cooperate with foreign professional powder spraying equipment manufacturing companies to carry out a number of large-scale spray assembly line projects, conduct in-depth research and development according to the original drawing design technology, and constantly improve the production process to achieve the positioning of powder spraying equipment.

In the work of powder spraying equipment, many customers are entangled in a problem, that is, about the curing temperature and time of powder coating. Today, the powder spraying equipment manufacturer Xinkaisheng coating will share the knowledge points necessary to master for everyone. First of all, the curing process of plastic powder is a chemical cross-linked film forming process, the ideal curing condition of epoxy polyester powder coating is: 180℃, 20min(in the case of the overall temperature of the drying path is stable, except for some specific product categories, the time and temperature are slightly adjusted). If the curing furnace temperature in the powder spraying equipment is too high and the time is too long, the Coatingagingphenomenon will occur, especially the white coating will turn yellow after aging. If the baking path (oven) design is not suitable, the temperature difference is too large, there will be local baking yellow phenomenon; At this time, the hot air circulation system should be increased, and the furnace temperature should be adjusted in the appropriate range. The point is that the general coating is brittle after aging!! Some powder spraying equipment manufacturers designed the drying passage heating time is too long, from room temperature to 180 ° C takes 2-3h, to 180 ° C after constant temperature 20min, so it is easy to over-cure, should make the drying passage sealed insulation, heating time in 20-40min is easy, and make the internal hot air convection, uniform temperature. When using the far-infrared heating tube to heat up, attention should be paid to the distance between the workpiece and the heating tube (should not be less than 200mm), if the site limit distance is too close, the white coating is easy to bake too much and return to yellow, you can add an iron plate (thickness 1.5-2mm) between the workpiece and the heating tube, and the thick steel plate can be drilled, which can reduce or avoid the possibility of "baking yellow".
For the coating whose curing furnace temperature is too low or drying time is too short, the film is incomplete and the coating adhesion is poor. For matte finish, matt powder gloss is too high, poor adhesion. If such problems occur, reasonable curing is required again to obtain a qualified product.