RANCANG BANGUN ALAT POWDER COATING: BOOTH PENYEMPROTAN DAN OVEN CURING

Abstract

This study integrates the design and construction of a powder coating spray booth and a curing oven into a practical coating system for an automotive education laboratory. The booth was designed as a spraying area equipped with a 10-inch exhaust blower and powder collection arrangements, while the curing oven uses an infrared ceramic burner, a thermocouple, a REX-C100 PID controller, and an automatic timer. The study used an experimental approach with observation, functional testing, documentation, and descriptive analysis. Booth and spray gun tests showed that powder could be sprayed and partially extracted and collected; however, fine powder could still escape because the exhaust system did not use a filter. At 40 kV and 40 psi, visual spraying results at distances of 5, 10, and 15 cm differed, with the 10 cm distance producing a relatively uniform coating. Oven temperature tests showed actual temperatures of 147°C and 178°C at set points of 150°C and 180°C, respectively. The timer matched the selected durations of 10, 15, and 20 minutes. At 180°C, visual curing observations at 5, 10, and 15 minutes indicated progressively more integrated coating, although the optimum curing condition cannot be established from visual assessment alone. The integrated equipment can support practical powder coating activities, with further testing needed for extraction efficiency, temperature stability, adhesion, and coating thickness.