The characteristics of the immersion process, the advantages and disadvantages of the immersion method

Immersion is a traditional method in paint coating process. Its process is to remove the work piece is not in the paint liquid, remove the remaining paint, after drying to form a paint film. Immersion application is very extensive, let's share the characteristics of the immersion process and the advantages and disadvantages of the immersion method
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coating is characterized by: simple coating process, high production efficiency, easy to achieve the coating process mechanization. The paint equipment is simple and suitable for primers that coat work.
immersion process requires simple geometry of the work piece. When the work piece is removed from the ends, it does not stay in the paint liquid, and the remaining paint can flow evenly down. Therefore, work parts with large bumps and bumps in the inner wall, such as work with deep grooves, blind holes, etc., as well as work parts floating in lacquer liquid, are not suitable.
coatings for immersion are mainly acetic resin paint, asphalt paint, epoxy primer paint, oily paint and water-soluble paint. Immersion is selective for coatings, easy to peel and pigments are easier to precipitate paint, are not suitable for immersion.
the quality of the coating is the viscosity and temperature of the paint. The viscosity of the paint affects not only the thickness of the coating, but also the speed at which the paint is flowing from the coating surface. The smaller the viscosity of the paint, the faster it will flow, which is beneficial to the paint. Sticky through the small so that the paint film is too thin, too large is the paint film thick and uneven. The temperature of the lacquer liquid directly affects the viscosity, so it can be used to adjust the viscosity of the lacquer liquid to meet the expected requirements. However, the annual lacquer liquid temperature is high and the solvent evaporates quickly. In the lacquer liquid, the temperature should be 20 to 30 degrees Celsius, followed by the uniformity of the paint. In order to make the thin layer of paint film have a good cover, the use of high cover paint.
, the hanging and transport of work parts is also related to the quality of the coating. In order to make the coating evenly soaked, the best hanging position of the work piece should be the maximum surface position on the work piece is close to vertical, while the other surfaces are tilted with the horizontal surface, and its angle should be 10 to 40 degrees. The work piece must be slotted to prevent bubbles from creating. During the removal of paint and drying, the workman position is
the position when the coating is maintained.
, according to the form factor of the work piece and production batch, immersion methods are intermittent and consecutive. Intermittent immersion equipment is a fixed slot for small batch S production. The use of rotary arm hanging, balance lifting, monorail lifting and other conveying work items. Continuous immersion master play using ordinary, suspension chain or pushchair suspension chain transmission work, for a large number of scene production.
in the immersion process, it is generally not appropriate to add new paint. It is also not allowed to stir. Due to painting and stirring, bubbles will be generated in the lacquer tank, which will affect the quality of the paint film U should be stirred regularly. After stirring or injecting new paint, should be set aside for a certain period of time, until the bubbles are removed, and then soaked.
do not use the dipping tank, it is advisable to put the paint in the tank to keep the oil paintclean, while reducing solvent volatility and fire risk. After a certain period of time, the paint in the lacquer tank should be poured out or pumped out with lacquer,wash the lacquer tank.
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