Coating,methods,and,precaution business, insurance Coating methods and precautions of metal powder coating
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Since the metal powder coatings can demonstrate a bright, luxurious decorativeeffect, it is very suitable for furniture, jewelry, cars and other indoor andoutside objects spraying.In themanufacturing process, the current Chinese market is mainly taking theDry-Blending method, the international community also use Bonding method. Inmost cases, we recommend using an electrostatic gun for coating. Metal powdercoatings coating method, the friction gun is generally not suitable for the coatingof metal powder coating. Due to this type of products containing metallicpigment, while using an electrostatic gun in construction should ensure thatthe system is well grounded, setting a lower electrostatic voltage and powderamount at the same time, prevent generating ignition when spraying. The effectof forming a coating film and the gun setting, the quality or brand has a greatrelationship. After longtime spraying, there are may be a lot of metal powder accumulated in the gun discharge needle, which required the constructorregularly clean up the discharge needle.The shineof metal powder coatings in most cases due to the error is large, we do notrecommend using gloss device to measure metallic appearance coating gloss, butonly by visual comparison method to determine whether it is the same with sample.The recyclability of the metal powder coating for the powder manufactured bydry mixing method, because of in the process of spraying and recovery will occurseparation, thus there are some differences on recycling powder and new powdersmetal pigment content, may cause the coating film appearance inconsistencies,appear color cast. This is because the metallic pigment and the nature of powderparticles difference. Experts recommend that the reclaimed powder and newpowders ratio should at least 1:4.If useadhesive fixing method manufacturing powder coating, due to the ratio of metalpigment and powder particles is relatively fixed, then it could re-use recycledpowder. Spray varnish layer on metal powder layer has the following advantages:Enhanced metal powder coatings anti-stoning properties; increase the aestheticeffect of the coating metal powder; completely solve the scraped property of metallicpigment; improve weatherability of the coating metal powder. To ensure the appearanceof varnish layer, requiring workpiece by first spraying should not be subjectto any contamination. Thus, it generally needs for fully automated spray linesand two separate rooms for each spray painting.Recommendedunder normal circumstances do not spray varnish layer. Only using in verydemanding, such as: high-end appliances, car wheels and outdoor use (to ensuredurability) and so on. Metallic pigments scraped property, either bydry-blending method or bonding method manufacturing powder, were not completelysolve the problem of metallic pigments scraped property. The only way to solvethe scraped property is spraying a layer of transparent coating film in the metalpowder layer. The method to keep the metal powder coating appearanceconsistent: for the same product, try to use the same batch of metal powdercoatings, avoid the difference between powder coatings batches; keep sprayingconditions stabilize.Using thesame set of spray equipment, using the same voltage, pressure and otherparameters, try to keep the gun and the workpiece distance not change, try tokeep the stability of the film thickness; guarantee powder coatings have beenfully fluidized before spraying; while using recycled powder should ensure the ratioof recovery powder and new powder less than 1:4; recommend multiple parts to beassembled together spraying at the same time.Source:http://www.mhcmp.com
Coating,methods,and,precaution