Powder coating is a metal finishing process which replaces wet spray painting methods with a far more efficient and effective color coating system. A quick explanation of the process will help the reader understand what is involved here.
Pretreated metal components for a wide variety of manufactured and assembled items are hung on racks. This pretreatment consists of cleaning the surfaces beforehand, either with an abrasive or a chemical cleaner. After this pretreatment, the parts which are then electrically grounded are then coated with a colored, electromagnetically charged dry powder which adheres to the treated surfaces. Moving them to the curing oven, the coated part is then baked at high temperature and the powder subsequently gels under the heat. Flowing over every inch of the coated surface, the result is a smooth finish which then cures in the oven. After this stage, the parts are then removed and left to air-cool, after which they are passed on for final assembly.
The powder coating production line consists of the following segments. Parts are first cycled through pretreatment enclosures. These are either manual washing booths for small-scale production operations or a full multi-stage washing tunnel. The steam units apply cleaning chemicals in a jet of wet or dry steam, with some units equipped to provide ambient temperature wash/rinse functions in addition to the steam bath. Blast rooms quick dry parts after pretreatment and eliminate all remaining dust contaminants prior to the parts passing to the actual application booths. The actual powder spray booths are where the real action takes place. Outwardly designed much like standard spray booths, these are equipped with power ventilation to facilitate airflow during the actual application and waste elimination. Powder coating booths can either be configured for manual or fully automatic operation. Last and as important, the coating ovens finish the curing of the powder coat, designed to provide uniform temperature for efficient curing, and can be configured to the plant owner’s particular needs.
Powder coat painting processes offer maximum efficiency in paint production. Parts receive an even coat on every inch and bend of the surface, with less actual material used to accomplish the job. Also, dry powder is easier to clear out of the application booth, reducing downtime on post-application cleaning. Parts cycle through the production line much more quickly, speeding up overall production with markedly reduced wastage. And that helps with the bottom line in the long run.