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The new EcoCCore uses nonhalogenated hydrocarbons and modified alcohols Due to a onethird increase in product throughput and load weight it enables a marked reduction of perunit cleaning cost

Solvent-Based Part Cleaning

Nov. 4, 2013
Uses non-halogenated hydrocarbons, modified alcohols Two flood tanks, bypass filtration One-third more loading volume than previous system Use ultrasound and filtration simultaneously

DÜRR ECOCLEAN’s EcoCCore system improves on the previous 81C/P equipment series, setting a new standard in solvent-based part cleaning. Its one-third increase in product throughput and load weight yields a marked reduction of per-unit cleaning cost. Designed to use non-halogenated hydrocarbons and modified alcohols, the EcoCCore also boasts superior ease of operation, less space demand and a translucent design.

Wherever grease-free surfaces must be obtained, solvents are the part-cleaning medium of first choice. Users want process reliability, cost and energy efficiency, high speed, availability, short delivery times and eco-compatibility. Standard equipment includes two flood tanks, heat recovery, and full-flow plus bypass filtration capabilities. Switching from non-halogenated hydrocarbons to modified alcohols and back is easy.

The work chamber is designed for cleaning tanks up to 670 x 480 x 400 mm, thereby offering one-third more loading volume than the predecessor system. Throughput can be doubled, depending on the basket size. The maximum load weight capacity has been increased by more than 30% to 200 kg. With a cycle time of less than 8 minutes this provides a significant reduction in per-unit cleaning cost.

A big step toward improved cleaning quality lies in the new preliminary steam degreasing process: the oil-containing distillate is not passed into the flood tank as usual but is directed straight into the distilling system. This minimizes oil deposits in the flood tank and an undesirable oil enrichment of the solvent.

In addition, the preliminary steam-degreasing step offers advantages under elevated oil drag-in conditions, or when a second flood tank is used for a preservation treatment.

Boosting Cleaning Performance

Another innovation boosting cleaning performance is the ability to use ultrasound and filtration simultaneously. Particles are discharged throughout this process cycle, as opposed to conventional systems in which they settle at the bottom of the work chamber before being filtered.

In the EcoCCore design, pumps are equipped with variable-frequency drive units and control the volumetric flow rate in such a manner that the ultrasonic system can exert its effect. The combined filtration system ensures an effective discharge of particles. Moreover, the unit comes with a frequency-controlled rotary drive for turning and high-accuracy positioning of parts. A "gentle" operating mode prevents sensitive parts from getting dropped or displaced during start-up or handling operations.

Internal heating elements have been removed from the stainless steel flood tanks, so the design eliminates the potential of particle trap points or chip accumulation thereby reducing any re-contamination of parts.

The EcoCCore machine has a 7-in. color display with self-explanatory pictographs. If a temperature needs to be preset only for the first flood tank, a matching setting for the second tank is selected automatically. Process tracking and maintenance are intuitive and more convenient thanks to the integrated part visualization system. An optional full visualization capability can be integrated above the control panel.

Both flood tanks are heated entirely with thermal energy recovered from the distilling circuit. The heat input from the distilling system can be adjusted as needed in multiple stages. As a result, energy is saved while high throughput is guaranteed even with high oil drag-in rates.  A new process based on jacket heating is fully decoupled from the distilling system, ensuring optimized, gentle oil evaporation.