Solvent-Based Parts Cleaning System

Dürr Ecoclean’s EcoCCore solvent-based parts cleaning system is designed to improve cleaning performance, process reliability and cost savings. It operates under full vacuum conditions and features two flood tanks, heat recovery and full-flow as well as bypass-filtration capabilities. For increased production flexibility, machine operators can switch between non-halogenated hydrocarbon and modified alcohol solvents.

The system uses a preliminary vapor degreasing process, which directs oil-rich solvent into the distillation system rather than the flood tank. This minimizes oil deposits in the flood tank and saturation of the solvent. This technique is useful for parts that will be coated or laser-welded after cleaning, the company says. In addition, the preliminary vapor degreasing step offers advantages under elevated oil-input conditions or when a second flood tank is used for corrosion protection.

The system also enables the use of ultrasonic and filtration simultaneously. With this feature, particles are removed from the work chamber throughout the process instead of settling at the bottom of the work chamber before being filtered. The machine’s pumps are equipped with variable-frequency drive units, and control the volumetric flow rate so that the ultrasonic system can exert its full effect. The unit features a frequency-controlled drive for the rotation and high-accuracy positioning of parts. A gentle operating mode prevents sensitive parts from being dropped or displaced during start-up or handling operations.

The work chamber holds cleaning loads ranging to 26.4" × 18.9" × 15.7" and weighing as much as 440 lbs. The unit features a cycle time of less than eight minutes. Both flood tanks are heated using thermal energy recovered from the distilling circuit. The heat input from the distilling system can be adjusted as needed in multiple stages.