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Pretreatment Cataphoresis EP Electrophoretic Coating Line
Classification
Electro-coating is a process of immersing metal parts in a fluid bath, where an electric charge draws paint or epoxy particles in the fluid to the surface of the part.
The through-type electrophoretic coating equipment for continuous production usually forms a continuous coating production line with the equipment for surface treatment and drying before painting, which is suitable for mass production. The workpieces are put into the electrophoretic tank for electrophoretic painting continuously with the help of hanging conveyor.
Intermittent production is fixed electrophoretic coating equipment, the workpiece enters the electrophoretic tank for electrophoretic coating intermittently with the help of monorail electric hoist or other forms of conveyor (e.g. PC-controlled electric railroad trolley or gantry crane, etc.), which can be used to form an intermittent production coating line with other processes, and it is adapted to medium batch coating production.
Composition
The equipment for electrophoretic coating is composed of electrophoresis tank, stirring device, filtering device, temperature regulating device, paint management device, power supply device, water washing device, ultrafiltration device after electrophoretic coating, drying device, and backup tank.
The size and shape of the electrophoresis tank should be determined according to the size and shape of the workpiece and the construction process. Under the condition of ensuring certain distance between poles, it should be designed as small as possible.
The tank is equipped with filtering device and temperature regulating device to ensure a certain temperature of the paint and remove impurities and air bubbles in the circulating paint.
Stirring device can make the work of the paint to maintain uniformity and consistency, more use of circulating pumps, paint circulation is generally 4 to 6 times per hour, when the circulating pump is on, the paint level in the tank should be uniformly flipped.
The role of paint management device is to supplement and adjust the composition of paint, control the PH value of tank liquid, remove the neutralizer with diaphragm electrode and exclude the low molecular weight components with ultrafiltration device.
The selection of electrophoresis power supply generally adopts DC power supply. Rectification equipment can be silicon rectifier or silicon controlled. The size of current is related to the nature of coating, temperature, working area, energizing method, etc. It is generally 30~50A/m2.
Water washing device is used for rinsing the workpiece before and after electrophoretic coating, generally deionized water is used, but pressurized equipment is needed, and a common one is a drenching nozzle with a spiral body.
The drying device is used to promote the drying of electrophoretic coating into film, and it can adopt resistance furnace, induction electric furnace and infrared baking equipment. The oven design should have three sections of preheating, heating and post-heating, which should be formulated according to the varieties of coatings and workpieces.
Product Display
Question for designing a line
Durable, lasting finishes. E-Coating is renowned for its ability to stand up to outdoor weathering and indoor environments where harsh chemicals may be present, as well as being chip resistant.
Complete coverage and consistent thickness. E-Coating works well with complex shapes, allowing for better coverage and thinner coats than other methods.
Efficient coating usage. E-Coating can be used for higher volume production runs and uses paint more efficiently than spray techniques, delivering a high-quality finish with almost zero waste.
Excellent primer. Good inter-coat adhesion with most topcoats makes E-Coating a great primer for almost all ferrous applications.
Environmentally friendly. A water-based, immersion technology, E-Coating produces no Hazardous Air Pollutants or Volatile Organic Compounds. As with powder coating, once parts are coated they must be allowed to cure in an oven set to between 180 and 400 degrees Fahrenheit, depending on the coating and the temperature tolerance of the part.