In the coating production line, the dried coating surface presents many point protrusions, which are called particles in industry. The appearance of coating particles seriously affects the quality of paint film and damages the appearance of products. Skilled use of coating equipment can effectively avoid the emergence of coating particles.
In view of the air quality problem causing particulate matter phenomenon, under the condition that the smoke has a more and more serious impact on the whole country, the coating operation is strictly prohibited from outdoor construction. When using the roller coating machine, it is recommended to close the protective cover of the roller coating part to ensure that the paint on the roller coating is not affected by the indoor dirty air. In addition, a roller coating machine with scraper shall be selected to further ensure that there are no sundries on the roller. During the spraying operation, although the spraying room is strictly required to wear construction clothes and exhaust, the spraying area of the full-automatic NC five axis spraying machine is independent, which ensures that the spraying process is completed in a higher quality independent space. When materials rotate in and out automatically, the bin door will open and close automatically instead of opening.
After the air environment quality is guaranteed, let's explore another reason for particles, floating dust and impurities on the coating surface. In the coating production line, the dust removal steps must not be omitted, because there will be some dust on the board, especially in the grinding process, dust will be generated again, so a dust collector must be added. According to the needs, double-sided dust remover can also be selected instead of manual dust removal, multi row brush can be used to remove the dust on the board, and large-diameter air knife can absorb impurities. It is generally used after the last primer is polished. The effect is obvious.
The production of particles is also closely related to coatings. Improper storage of paint will lead to deterioration or coarsening of paint or condensation of pigment. The deterioration of two-component coating curing machine is also one of the main causes of particles. Therefore, the coating must be stored properly. In the coating operation, the coating equipment needs to be equipped with paint filtering system. For example, in the spraying process, the contact area between paint and air can still be recycled. If the multi-layer filter box is not used, the coating quality is difficult to guarantee. In the design of paint filter box of coating machine, heating and multi-layer filtering defoaming functions are added, which is difficult to produce particle phenomenon again.
The structural design of coating equipment is based on rich practical experience. Therefore, among similar coating equipment with similar appearance, skillfully using high-quality coating equipment and flexibly mastering its functions can well avoid problems such as coating particles.
