Pre-treatment: To remove the impurity on the object that needs to be painted, such as oxide, rust, grease, etc, to provide a good substrate for spray painting, it adopts the processing of phosphorization, oxidation, passivation to ensure the coating has the properties of antisepsis and decoration.
The pre-treatment includes: Spray type, tank-DIP type, skin-diving
Major component: Shed body, tank, exhaust systems, pumps and sprinkler system, air supply system, hanging chain protection, water separation equipment, heat exchange system, slag removal system, pickling systems, pure water generation system, temperature control system, electronic control system and other system.
2. Spray painting: Through the spray gun or disc atomizer, by means of pressure or centrifugal force, dispersed into uniform and fine droplets, painting on surface of objects that need to be coating.
It can be divided into air spray, airless spray, electrostatic spray coating, and the basic form of various derived methods, such as a large flow of low pressure spray coating, thermal spraying, automatic spraying, and multiple spray.
Spray operation with high efficiency, suitable for manual and industrial automation and wide application. Mainly used for metals, plastics, furniture, military, marine and other areas. This technique is currently the most common application of a coating method.
Spraying operations require environmental requirements for clean room of million to hundred level.
Spraying equipment includes spray gun, spray booth for paint room, drying room, spraying equipment, the workpiece transport operations, anti-fogging and wastewater, waste gas treatment equipment.
Kind of coating material: Oil coating, lacquer coating, powder coating, UV oil coating.
Kind of spray booth:
1) Dry spray booth: For small quantities and more complex parts
2) Atomizing-type spray chamber: For small parts
3) Water curtain spray chamber: For the medium-sized parts
4) Rotating water spray room: Large decorative pieces, a higher degree of accuracy.
Major structure of spray booth:
1) Room Structure: The role is very limited, the paint mist within a certain range.
2) Mist filter: Sub-types of dry and wet.
Dry: Mist filter paper in the baffle or infiltration.
Wet: The water in the gas mixture, separation of mist particles from the air (wet room rather than the more environmentally friendly dry conditions point)
3) Water supply systems: Ensuring the necessary room for the normal cycle of spray water.
4) The ventilation systems: From gas, exhaust composition, equipment has a certain temperature, humidity and air cleanliness, to ensure that indoor air laminar flow conditions.
5) Lighting: To ensure good lighting.
3. Stoving: As the heavy construction machinery and parts machine, heat capacity, so it's anti-rust coating drying, generally uniform baking hot air convection drying method. Heat source can be local conditions, use of steam, electricity, light diesel oil, natural gas and liquefied petroleum gas.
Divided into: Hanging air furnace, tunnel furnace, oven cabinet.
Major component:
1) Drying room: To cycle hot air does not spill, so that the indoor temperature is kept within a certain range
2) The heating system: A radiation heating and convection heating to ensure the indoor air temperature in the range of technological requirements
3) Duct: Guide the hot air circulating in the drying room, the heat to the workpiece
4) Air filter: Filter dust in the air
5) Air heater; Heated indoor air circulation
6) Fan: Forced hot air circulation drying room
7) Air curtain system: To prevent the hot air to leak out, to improve thermal efficiency
8) Temperature control system: To ensure that indoor temperature of each device to process requirements
The pre-treatment includes: Spray type, tank-DIP type, skin-diving 
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