Inside an Inline Cleaner: How PCB Cleaning Machines Work
Inline cleaners are essential machines in electronics manufacturing, designed for high-throughput cleaning of printed circuit boards (PCBs). Positioned after reflow and inspection units, these cleaners seamlessly integrate into production lines, maximizing efficiency.
In today’s Ask Dr. Adam video, he explains how the inline process offers advantages over batch cleaning, particularly in handling complex parts and maintaining high throughput. Dr. Adam illustrates that the cleaning process mimics a car wash, with PCBs traveling on a conveyor belt through four distinct sections. He covers how the first wash section sprays cleaning chemistry onto the boards, using various nozzles and jets to reach intricate areas. Next, the chemical isolation zone acts as a pre-rinse, removing excess cleaning agents. The third section provides a final rinse with deionized water, ensuring boards are thoroughly clean. Lastly, he discusses how the drying section prepares the PCBs for further processing or conformal coating. This efficient, four-stage cleaning process ensures that circuit boards are thoroughly cleaned and dried, ready for the next phase of production.