Second, water impurities. Mainly pre-treatment of the water used in the sand content, salt content is too large impurities caused by.
Third, the suspension chain impurities. Mainly suspended chain oil plate and a spreader water plate (material for hot galvanized plate) by the pretreatment acid, alkali vapor corrosion products.
Fourth, powder impurities. Mainly too much powder additives, pigment dispersion is uneven, powder extrusion caused by the powder point.
Fifth, pretreatment impurities. Mainly phosphate slag caused by large particles of impurities and phosphate film yellow rust caused by small pieces of impurities.
Sixth, curing furnace impurities.
The common problem of painting equipment is the environmental pollution of the production site: paint spray booth discharge water (slag), exhaust gas pollution; powder spraying room overflow powder generated by the dust pollution. In addition, in the electrical explosion-proof (fire), there are more deficiencies, such as: electrical explosion-proof (fire) level does not meet the requirements of the national mandatory standards, explosion-proof (fire) facilities configuration is incomplete and other issues. As these issues generally do not affect the quality of the workpiece spraying, so often do not pay attention to or from the cost considerations and cuts, so it is more important to the supervision of the relevant departments and mandatory requirements to promote, in order to eliminate safety hazards, improve the working environment of the operators, and so that the exhaust gas (water) discharge standards. In recent years with the strict requirements of environmental protection, environmentally friendly coatings have been rapid development, to reduce environmental pollution has played a positive role.
Water curtain paint spraying room in the structure includes: room body, water tank, water curtain board, water circulation system, air extraction and filtration system, lighting device, etc., hanging conveyor chain and hanging workpiece through the room body is sprayed paint.
Water curtain paint spraying room in front of the water curtain board, water curtain board above the overflow tank, water curtain board behind the multi-stage water curtain spraying device, scroll room. The workpieces are sent into the spraying room by hanging conveyor chain. Operator with hand-held electrostatic paint spray gun or fixed rotary cup paint spray gun on the workpiece for spraying operations, scattered overspray paint mist with the airflow attraction, into the paint spraying room, the first with the water curtain board of the water curtain meets the centrifugal force of the scroll plate to the exhaust gas into the water, so that it is washed to the tank, the rest of the paint spray in the multi-stage curtain spraying purification, completely intercepted in the water.
The paint spraying line generally adopts water curtain spraying room, water spinning spraying room, dry spraying room and water washing spraying room to spray the workpiece. Plastic spraying coating line generally use electrostatic spraying method to spray the workpiece, the main equipment of the spray booth by the powder spraying room, electrostatic powder spraying equipment and spray gun, powder recycling device and other components. Now mainly to spray paint coating line in the water curtain spray booth as an example for overview and analysis. This water curtain paint spraying room is simple and practical, and is currently used more in the paint spraying and coating line.
To paint mist after the airflow and then through the gas-water separation device to remove the odor treatment, purified gas and finally discharged to the outside. The water curtain captures the paint mist with the water flow into the water pool, the pump pumping and filtering, paint residue floating on the water surface, in the paint coagulant added to the pool under the action of cohesive agent, cohesion into a loose mass, can be scooped out of the container to focus on the treatment, to keep the water quality clean. Through the role of water curtain spraying room and auxiliary equipment, can be ideal to complete the workpiece spraying and paint mist purification purposes.