(6) ultrafiltration system controlling the concentration of impurity ions into a workpiece, to ensure coating quality. In running this system should be noted that once the system is running should run continuously, intermittent operation is prohibited electrostatic sprayer to prevent the ultrafiltration membrane dry. After dry resin and pigment attached ultrafiltration membrane can not be thoroughly cleaned electrostatic spraying equipment, it will seriously affect the ultrafiltration membrane water permeability and life. Ultrafiltration membrane water rate increases with time running downward trend, from 30 to 40 days of continuous work should be cleaned once, in order to ensure the required ultrafiltration UF dip and rinse water. (7) electrophoretic coating method is suitable for a large number of assembly line production process. Update cycle electrodeposition bath in three months or less should be. With an annual output of 300,000 steel ring electrophoresis production line, for example, the scientific management of the bath is extremely important for the bath parameters on a regular basis to detect and according to test results to make adjustments and replacement of the bath. Usually the following frequency measurement of bath parameters: electrophoretic liquid, ultra-filtrate and ultrafiltration cleaning fluid, Yin (Yang) very liquid, circulating lotion, deionized cleaning fluid PH value, solid content and conductivity once a day; Yan Kibbee, organic solvent content, small cell test laboratory twice a week. Pretreatment purpose: removing the coated member carried by foreign bodies, such as scale, rust, grease, etc., required to provide a good suitable for coating a substrate coating, such as phosphate, oxide, passivation, to ensure that the coatings have good corrosion resistance and decorative properties, pretreatment equipment is divided into physical formula, chemical formula. 1, the physical type: ① to remove impurities attached to the steel surface of the powder coating, with thinner to remove grease and other dirt. ② If sulfate or corrosive salts, should be washed with water, with compressed air. ③ on the steel plate pretreatment line to blasting or sand-blasting method to scale, rust and other impurities cleaned and then purified with a vacuum cleaner or compressed air to the steel surface to be cleaned. 2, the chemical formula: 1, immersion, injection, spray dip combine style, spray - dip - a combination of jet type. 2, acid, phosphate slag and oil-water separation equipment is the key to the system, phosphate slag there is sedimentation method, commonly used spin-liquid separation method, inclined plate sedimentation, filtration bag, plate and frame filter press. 3, oil and water separation are: adsorption, ultrafiltration, heat oil separation and centrifugation method. Automatic spraying equipment, Sino painting equipment (certified), provided by Qu Sino spray painting equipment co. Linqu Sino Painting Equipment Co. (www.wfjn.com) (www.wfjn.com) (www.wftcsw.com) is an industry leader in Shandong Weifang, industrial automation control systems and equipment, over the years, the company implementing the scientific management , innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Sino painting equipment in leadership with the staff warmly welcome all inquiries negotiations to create the painting equipment Sino better future.