Wall Colmonoy, Madison Heights, Mich., announces its turnkey roller coating solution, an automated, cost-effective brazing paste application process for large-tolerance non-flat surfaces such as those on catalytic converters. The R&D department works directly with customers to develop the right customized paste, a blend of Nicrobraz filler metal powders mixed with gel S’ Binder , for specific applications. Primary applications for roller coating are catalytic converters and fin & tube exhaust gas recirculation (EGR) coolers and heat exchangers.
”Roller Coating and Screen Printing have seen significant growth because the increased precision requires less paste and greater efficiency in mass production in comparison to the other methods. It is quickly becoming a replacement for foil,” says Lydia Lee, Director of Brazing Engineering Center.
Like roller coating, screen printing processes are an alternative method to improve productivity and minimize material waste. Nicrobraz pastes can be applied to various surfaces using the Screen Printing application process. Screen Printing is a technique that applies a well-defined pattern of paste applied through a precisely designed mesh. Screen Printing has become a popular process because of excellent repeatability, good metering capability, ease of automation, no special operator skills, and high throughputs. In the Power Generation industry, applications for screen printing can include heat exchangers such as the micro-turbine recuperators.
