Precautions for painting the production line

 Industry news    |      2023-08-04 15:15:26

What should you pay attention to when working on the painting line?

First, the coating production line should pay attention to the attachment of the coated objects. The test immersion method is used to design the hanging and the object on the painting line in advance to ensure that the workpiece is in the best position during dip coating. The maximum plane of the object to be coated should be close to vertical, and the other planes should be at an angle of 10-40 with the horizontal level, so that the painted surface of the residual paint can flow smoothly.

2. After dip coating of large objects on the coating production line, the solvent should be basically evaporated before being sent to the drying room.

3. In the coating production line, in order to prevent the diffusion of solvent in the workshop and the dust falling into the paint tank, the dip tank should be protected.

4. When painting, always pay attention to the determination of the viscosity of the coating. The viscosity should be measured 1-2 times per shift. If the viscosity increases by more than 10% of the original viscosity, the solvent should be added in time. When adding solvent, stop dip coating. After stirring evenly, the viscosity is measured and then the work is continued.

5. The thickness of the paint film is mainly determined by the rate at which the object is lifted on the coating line and the viscosity of the paint. After controlling the viscosity of the paint liquid according to the above requirements, the coating production line should determine the appropriate lifting rate according to different equipment according to the maximum speed of the film film of about 30um. The object to be coated is lifted evenly at this rate. The lifting rate is fast, the paint film is thin, the lifting rate is slow, and the paint film is thick and uneven.

6. When the dip coating operation is carried out on the coating line, the paint film on the upper and lower sides may sometimes have a thickness difference, especially at the lower edge of the object to be coated. In order to improve the decorativeness of the coating, the excess accumulated paint drops can be manually removed by brush in small batch dip coating, and these paint drops can also be removed by centrifugal force or electrostatic attraction equipment.

7. Strengthen ventilation equipment to prevent the danger of solvent vapors; pay attention to the arrangement of fire prevention measures and regularly check the coating production line.

8. When dip coating wooden parts on the coating production line, pay attention to the time should not be too long, so as to prevent the wood from entering excessive paint, causing slow drying and waste.