Powder Coating Booths, Electrostatic Guns, and Cartridge Recovery Systems for a More Efficient Finishing Process

Powder coating provides a durable finish while improving efficiency and reducing waste. But getting the most value from your powder finishing process and achieving consistent results is more than just applying powder to your parts or components. A well-designed powder coating system combines a powder booth, electrostatic application equipment, and a powder recovery system to create an efficient finishing process. When all of your equipment components work together in a unified system, you can improve efficiency, maintain a cleaner environment, and recover usable overspray.
Powder Coating Booths: The Foundation of the Finishing System
Powder coating booths provide a controlled environment for applying powder to the components or parts you are finishing while capturing overspray and preventing powder from migrating into the surrounding production area. Your booth design will vary depending on your production volume, part sizes, coating requirements, and if you are using manual or automated material handling. Some common configurations include:

• Open-face booths: Used for manual powder coating and lower-volume applications

• Enclosed booths for greater containment and controlled powder application

• Automatic powder booths designed for high-volume production

• Batch powder booths for finishing with multiple color changes 

Electrostatic Guns for Improved Powder Transfer Efficiency
Electrostatic powder guns are an important part of the application process. The gun gives the powder an electrical charge as it is sprayed on the component or part. The charged powder is attracted to the part, which adheres the coating to the surface. This improves transfer efficiency and reduces overspray. Application settings are matched to the part and powder being used. Considerations for electrostatic guns include gun voltage, powder flow, air pressure, part geometry, grounding, and spray distance.

What Happens to Powder Overspray?
Using an efficient electrostatic application process will still produce overspray. This overspray is captured by the powder booth and directed toward the recovery system. A cartridge recovery system separates powder from the exhaust air and collects it for reuse, helping to reduce material waste in your finishing process. The recovery or reclaim module captures powder and allows clean air to pass through the filters. The recovered powder is collected and returned to the application process.

Designing a Powder System for Your Production Requirements
Every manufacturing process is different, so your booth, electrostatic gun, recovery system, and material handling needs to be chosen based on your finishing process. Important considerations when designing a powder system include:

• Part or component sizes and weight

• Production volume and cycle times

• Powder coating specifications

• Manual versus automated applications

• Number of colors used or color change requirements

• Available facility space

• Airflow and ventilation requirements

• Powder recovery requirements

• Cleaning and maintenance procedures

For facilities with high-volume production lines can benefit from automated applications and recovery systems designed for continuous use. For smaller production runs or frequent color changes, you need the ability to quickly clean the booth, and recovery equipment can have a major impact on your production efficiency. 

Integrating Automation and Recovery Systems to Increase Efficiency
Powder coating is known for its material efficiency and recovery, but manufacturers can make the process more efficient with a properly designed booth with recovery technology and electrostatic applications. By integrating equipment into your finishing system, manufacturers can reduce material waste, improve coating efficiency, maintain a cleaner production environment, and build a production line that is better equipped to meet tough production demands.

Rohner designs and builds powder coating finishing systems for manufacturers to increase production and efficiencies. Talk to our team about integrating new equipment or designing a new system for your facility. 

Have questions? Please contact the Rohner team: info@rohner-usa.com