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Do you know the purpose of various coating equipment?
Painting is an important part of the surface manufacturing process. Anti-rust, anti-corrosion, aesthetics and the use of the material itself are one of the important aspects of the quality of the coating. Painting equipment is a vital part of the entire painting process. So what are the uses of each coating equipment? Let me introduce you one by one!
Painting equipment is mainly divided into pre-coating surface pretreatment equipment, painting equipment, coating film drying and curing equipment, mechanized conveying equipment, dust-free constant temperature and humidity air supply equipment, and other ancillary equipment.
1. Pre-treatment surface pretreatment equipment
The purpose of the pretreatment is to remove the foreign matter brought by the coated parts, such as scale, rust, grease, etc., to provide a good substrate suitable for coating requirements, such as phosphating, oxidation, passivation, to ensure that the coating has good Anti-corrosion performance and decorative performance. Pretreatment equipment is mainly divided into physical and chemical types.
Physical formula: Remove impurities attached to the surface of the steel sheet, and remove impurities such as grease by thinner. If there are sulfates or corrosive salts, they should be washed with water and blown dry with compressed air. On the steel plate pretreatment line, the scale, rust and other impurities are removed by shot blasting or sand blasting, and then the surface of the steel is cleaned with a vacuum cleaner or purified compressed air.
Chemical formula: impregnated, spray, dip-jet, spray-dip-jet combination. It mainly consists of tank body, tank heating system, ventilation system, tank mixing system, phosphating slag removal system, oil-water separation system and so on. Among them, the phosphating slag and oil-water separation device are the key systems, and the phosphating slag has the common methods such as sedimentation method, hydrocyclone separation method, inclined plate sedimentation method, bag filtration method, plate and frame filter press. The oil-water separation mainly includes: adsorption method, ultrafiltration method, hot oil separation method and centrifugation method.
2. Painting equipment
There are many methods for painting, such as brushing, dipping, air spraying, high pressure airless spraying, electrostatic spraying, electrophoretic painting, and lacquering. The ideal painting environment should meet good lighting, proper temperature, humidity and cleanliness, good ventilation and fire and explosion protection requirements.
The role of the painting equipment is to limit the overspray of the paint mist to a certain area and to be filtered to give the operator a working environment that meets hygienic conditions and safety regulations. In addition, construction conditions with a certain temperature, humidity and cleanliness should also be provided.
Common spray booths are divided into: dry spray booth: suitable for small batch workpiece painting; spray spray booth: suitable for small workpiece painting; water curtain spray booth: suitable for medium workpiece painting; water rotary spray booth: Suitable for painting of large workpieces with high decorative requirements.
3. Spray booth
Also called spray booth, it consists of the following parts and equipment:
(1.) Chamber body: The role is to limit the spray fog to a certain range.
(2.) Paint mist filter device: dry and wet. Dry the filter through a baffle or filter paper. The wet type separates the paint mist particles from the air by gas-water mixing.
(3.) Water supply system: ensure the normal circulation of water required by the wet spray booth.
(4.) Ventilation system: It consists of air supply and exhaust air, and provides air with certain temperature, humidity and cleanliness to ensure the indoor air is laminar.
(5.) Lighting device: Ensure that the equipment has good lighting.
(6.) Dipping equipment: The workpiece is immersed in the paint liquid, and the adhesion of the paint liquid is used to adhere a layer of paint to the surface of the workpiece. The dip coating equipment mainly consists of a tank body, a paint removing device, a stirring device, a heating device, a ventilation device and a fire safety device.
(7.) Electrostatic spraying equipment: It is realized according to the principle of the action of the electrostatic field on the electric charge. Generally, it includes an electrostatic spray booth, a high-voltage electrostatic generator, an electrostatic spray gun device, a paint supply device, and a safety device.
(8.) Electrophoretic painting equipment: Electrophoretic painting is the application of an electric field to ionize the coating particles dispersed in water to form a protective coating by electrophoretic coating on the working surface. The electrophoresis equipment generally comprises a tank body, a stirring circulation system, an electrode device, a paint liquid temperature adjusting device, a paint replenishing device, a ventilation device, a power supply device, and an electrophoresis post-flushing device.
(9.) Powder electrostatic spraying equipment: powder coating has good economy, no environmental pollution, high efficiency, and the coating thickness can reach 50μm or more. The powder electrostatic spraying equipment mainly comprises a powder spraying chamber, a high-voltage electrostatic generator, an electrostatic powder spraying gun, a powder feeder, a powder recycling device and the like.
4. Drying equipment
The main classification and composition of drying equipment: according to the heating method is divided into: convection drying, radiation drying, convection + radiation drying; according to the structural form is divided into: straight-through, bridge, П-shaped and so on. Main components: chamber body: the circulating hot air does not overflow, so that the indoor temperature is kept within a certain range; heating system: radiant heating and convection heating to ensure indoor air temperature control within the process requirements; air curtain system: Prevent hot air from overflowing and improve thermal efficiency; Temperature control system: A device that ensures that the temperature in each section of the room meets the process requirements.
5. Mechanized conveying equipment
Mechanized conveying equipment is mainly divided into two categories: air transportation and ground transportation. The air transportation includes: ordinary suspension conveyor, double-chain suspension conveyor, light suspension conveyor, accumulation suspension conveyor, and self-hoist transportation. Ground transportation includes: ground reverse accumulation conveyor, skid conveyor, tank chain conveyor, and ordinary ground conveyor. The role of mechanized equipment is to play a tissue coordination role throughout the coating line.
6. Electronic control system
Uses: The controller is distributed and installed near the equipment for easy maintenance and maintenance. The controller equipment can display the stability of the operation in a centralized manner. Features: The device can be connected to the company network, or use 4G network phone card to achieve remote data acquisition, intelligent production monitoring, and realize Industry 4.0. Remote equipment maintenance and repair, monitoring the operation status of the equipment monitoring system, transmitting data through the Internet of Things platform, data acquisition and analysis reports of the industrial computer.
The above is about the "Do you know the purpose of various coating equipment?" The relevant information is provided by 25 years of coating production line manufacturers Chuangzhi coating finishing, more information about the coating production line equipment, welcome attention We get updates!