Control of the paint application process and assessment of paint quality requires sampling and monitoring key process output parameters such as coating thickness, color and appearance.
More than 40 years ago, while many of us where still in school, a brilliant man in Europe named Ir. Pieter Gillis de Lange was working to come up with a new coating material that would radically reduce VOCs compared to traditional solvent-based coatings.
We coat a variety of parts with different metal gauges from 18-gauge up to very heavy steel plate. Some of our parts that have to be coated include very light gauge stock and very heavy stock in the same assembly.
Raw parts from customers are typically behind schedule when they enter the finisher's plant. The finishing process is generally the last process to complete before the product is sold.
When a manufacturer of upscale pens and pencils wanted a unique powder coated finish on the bodies and clips of its writing instruments, the company approached Powdercoat Services Inc., a custom powder coating job shop in Anaheim, Calif.
I am painting brass pen caps and barrels with a polyurethane black and clear coating. Cured parts are tested in a package to mimic shipping conditions. The coating behaves as if it were a thermoplastic resin. Parts held at 140°F with a relative humidity of 50 percent become marked by a string which holds the parts in the box. Information about both the coating application process and the paint chemistry is below.
Recently, I spent eight straight days in a liquid paint facility working to find the cause of severe craters in the clear coat. The work started at 6 a.m. and continued through the dinner hour. Testing, meetings, analysis and speculation comprised the day - and tended to interrupt our sleep as well.
EMB Technology has commissioned a pilot machine for powder coating for serial production of powder coated rolls of flexible metal substrates. This coating machine will be combined with a NIR (near infrared) curing unit.
Correcting Back-Ionization Starring We recently converted to powder coating from our old liquid operation for application on office furniture. The powder coating has been a success for the most part
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