company news about Automobile lighting spraying production process flow

The parts of the lights need to be painted mainly into: external mask (similar to the transparent cover of glass), mirror, some decorative frames, etc.

1. The spray paint of the mask is divided into external spray hardened paint and internal spray anti-fog paint. The purpose of external spray hardened paint is to improve the surface hardness, increase the corrosion resistance of the mask, and improve the weather resistance (to prevent yellowing and cracking of sunlight); The purpose of spraying anti-fog paint is to prevent the phenomenon of fog in the normal use of lights and improve driving safety;

2. The purpose of painting the reflector is to improve its surface gloss, improve the reflectivity after aluminum plating, and ensure the light distribution of the whole lamp;

3. The purpose of painting such as decorative frames is to improve the surface texture and cover the injection defects of rough parts.

The painting process of car lights is roughly divided into:

1. Surface treatment, electrostatic dust removal, injection molding parts after the surface there is a lot of static electricity, before painting the static electricity and dust must be removed to ensure the cleanliness of the product;

2. Spray painting, place the mask on the spray painting tool, generally use the spray manipulator (ABB, Yaskawa, Fanuc, etc.) to spray, spray parameters include flow, atomization, sector, spray distance, speed, Angle, path, etc.;

3. Leveling: the product is placed on the assembly line after painting, and the paint needs to be stably levelled at room temperature, as well as infrared heating and leveling. The purpose of leveling is to make all the paint drip into a flat surface, and the solvent in the paint is also volatilized at this stage. Improved bonding force between paint film and injection parts;

4. Ultraviolet UV curing, the paint contains photosensitizer, absorbs the energy released by ultraviolet light, and cross-linked curing reaction occurs with the paint resin to form a transparent dry paint film;

5. The outer mask also needs to be annealed at high temperature to release the internal injection stress and prevent cracking during use.