Precautions for metal powder coating

Metal Powder Coating Precautions for Metal Powder Coating: Pay attention to the installation of the object to be coated. Through pre-immersion testing, design the installation and hanging methods of hanging tools and objects on the production line. Ensure that the workpiece is in a good position during the dipping process. The large plane of the coating should be close to vertical, and other planes and angles should be 10-40°.

angle, so that the coating surface can flow more smoothly. In order to prevent the solvent from spreading in the workshop and dust from falling into the paint tank, the paint tank should be maintained during the paint line operation. After the large objects in the coating line are immersed, they should be sent to the drying room after the solvent evaporates.

When powder coating metal, pay attention to measuring the viscosity of the coating from time to time. Each level should measure 1-2 times the viscosity. If the viscosity increases by more than 10% of the original viscosity, the solvent should be added in time. When adding solvent, the dipping should be stopped. After mixing, measure the viscosity before continuing. The thickness of the metal powder coating is mainly determined by the speed of the object on the coating line and the viscosity of the paint.

Metal Powder Coating Excessive accumulation is shown at the lower edge of the layer. In order to improve the decorativeness of the coating, excess accumulated paint drops can be manually removed with a brush during small-batch immersion, or removed by centrifugal force or electrostatic attraction equipment. When immersing wood in the coating line, pay attention to not keeping it for too long, to avoid the wood absorbing too much paint, resulting in slow drying and waste. Strengthen ventilation equipment to avoid the harm of solvent vapor; pay attention to the arrangement of fire-fighting equipment and regularly check the coating lines.

What should be paid attention to in metal powder coating? Metal powder coating refers to the use of compressed air to disperse powder arches into powder mist particles, which are adsorbed on the surface of the material to be coated under the action of a high-voltage electrostatic field. The correct name of metal powder coating is electrostatic powder coating, and it cannot be simply completed using a spray gun. There are many important points to note in this process.

Selection of production fixtures and feeding methods. Clamp the two ends of the fixture to ensure that it can withstand partial weight pressure; reduce the contact points between the size of the fixture and the profile surface during the production and use of the fixture in the middle part, and powder the vertically placed hanging rod part in time. The hanging position of the profile hanging fixture should also follow the corresponding principles. For some deeper trough types, the powdering and pushing of the spray claw and the profile distance are more appropriate. Large surface area or complex structure outer surfaces should be prohibited from being placed downwards, and the decorative surface and non-decorative surface contours should be distinguished.

This pretreatment process is simpler than the ordinary oxidation pretreatment process, mainly degreasing and chromium plating, with less raw material consumption and easier daily maintenance. In order to improve production efficiency during the pretreatment process, energy consumption during the drying process can be reduced, and larger racks can be selected, and more materials to be treated can be installed. For some softer profiles, place a crossbar in the middle of the profile, so that the concave parts are placed as much as possible, which is conducive to water evaporation.

Metal Powder Coating Issues to note in the room. Before the formal powder coating, spray several times first, and then observe the size of the powder and the uniformity of the powder distribution on both sides of the spray chamber.