The working principle of a powder coating cooling unit with crusher with a crusher is to load the powder coating into a groove with a porous bottom plate, supply air from below the porous bottom plate, and make the powder coating float and become a flowing state (called a flowing bed) when blown by air. The coated material heated above the powder melting point is immersed in the groove, and the powder floating around the workpiece is melted and coated. Then, it is taken out of the groove and cooled to form a coating film.
The film thickness of the flow bed impregnation tank is controlled by heat and impregnation time. The powder coating cooling devicepowder coating cooling unit with crusher the coated powder particles into a smooth continuous coating film. When the coated material does not have enough necessary heat, post heat treatment is required. Especially when using thermosetting powder coatings, in order to fully cure, post heat treatment is usually required.
This method is applicable to almost all types of powder coatings. The required particle size of the powder is: epoxy resin 50-300 μ m. Polyamide 100-300 μ m. PVC 100-300 μ m。 Suitable for coated materials with relatively small volumes or simple spherical shapes, not suitable for coated materials with small heat capacity (such as thin plates). Commonly used for insulation coating of pipe joints, accessory frames of washing machines, and electrical components.
The equipment of the flow bed impregnation method for powder coating cooling unit with crusher is simple and does not require professional experience in painting. The coating thickness can reach 150-1000 μ m. Most suitable for painting that requires corrosion resistance, but not suitable for painting decorative items due to thick film and poor appearance. Changing the color requires changing the flow channel and is not suitable for multi-color painting.
The flow impregnation device is composed of a tank, porous plates (metal, resin, cloth, etc.), and a bottom plate, which is cheap in cost and easy to manage and maintain. Moreover, as a production method with good efficiency, there are no environmental hazards such as atmosphere, water quality, or industrial waste. According to the production volume and the size of the coating, manual, semi-automatic, or fully automatic conveying methods can be selected.
The disadvantages of this method are that the size of the coated material is limited, preheating is required, the film thickness is uneven, the temperature inside the tank rises, and the thermal capacity of the coated material needs to be large.
The bottom of the powder spraying room should be designed in a shape that does not accumulate powder coating or has a small amount of accumulation. The angle of the inclined part of the hopper is based on the angle of repose of the coating. Because of electrostatic adsorption, the angle should be greater than the angle of repose. In situations where angles cannot be taken, facilities such as vibrators and impactors should be used.
Furthermore, in highly restricted situations, the powder coating cooling unit with crusher should be designed with a horizontal bottom and corresponding discharge machinery such as a scraper.
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