Precautions for spraying line

1. Attention should be paid to the installation of the painted objects on the spraying line. Pre-dip test to design the hanger and object mounting method on the spraying line to ensure that the workpiece is in the best position during dipping. The largest plane of the object to be coated should be close to vertical, and the other planes are at an angle of 10°-40° with the horizontal, so that the remaining paint can flow out smoothly on the painted surface.

2. In order to prevent the solvent from spreading in the workshop and dust falling into the paint tank when painting on the spraying assembly line, the dipping tank should be protected.

3. After the large objects are dipped in the spraying assembly line, they should be sent to the drying room after the solvent is basically volatilized.

4. When painting, pay attention to the measurement of paint viscosity. 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, the dip coating operation should be stopped. After stirring evenly, measure the viscosity, and then continue the operation.

5. The thickness of the paint film is mainly determined by the rate of object lifting on the spraying line and the viscosity of the paint solution. After the viscosity of the paint solution is controlled according to the above requirements, the spraying line should be based on the maximum speed of the paint film about 30um, and the appropriate lifting rate should be determined by experiment according to different equipment. At this rate, the coated object is evenly lifted. The lifting rate is fast and the paint film is thin; the lifting rate is slow, and the paint film is thick and uneven.

6. During the dip coating operation on the spraying line, sometimes the thickness of the paint film to be coated and the lower part of the paint film is different, especially the thick accumulation on the lower edge of the coated object. In order to improve the decoration of the coating, use a brush to manually remove the excess accumulated paint drops when dipping in small batches, or use centrifugal force or electrostatic attraction equipment to remove these paint drops.

7. When dipping wooden parts on the spraying assembly line, pay attention to the time not to be too long, so as to avoid the wood from inhaling excessive paint, causing slow drying and waste.

8. Strengthen ventilation equipment to prevent the harm of solvent vapor; pay attention to the arrangement of fire prevention measures and regularly check the spraying line