Automated Recycling System Performs Filtration in Two Phases
IMTS 2018: Eriez’s Portable SumpDoc enables shop personnel to position the unit alongside the machine tool sump and treat the existing coolant, all during machine tool operation.
Eriez’s Portable SumpDoc enables shop personnel to position the unit alongside the machine tool sump and treat the existing coolant, all during machine tool operation. The fluid recycling system is automated and filters dirty sump coolant in a two-phase process. In the first phase, it vacuums out chips and sludge at a rate of 85 gpm (50 microns). In the second phase, it filters fine solid particulate to 3 to 5 microns and removes tramp oils to less than 0.5 percent at flow rates of 90 to 120 gallons per hour. Depending on the regularity of cleaning, a 200-gallon sump can be processed in about 2 hours. The system has onboard hookups and extensions to receive compressed air and 120-V, single-phase electric.
Features include touchscreen controls; hoses, couplings and floats; a vacuum that removes large chips and heavy sludge; a cartridge filter that removes fine-solid particulate; a centrifuge that removes emulsified oils from coolants; an ozone generator that provides biological control; a tank and pump for tramp oils; and utility hookups.
Optional equipment includes a high-speed, self-cleaning centrifuge and a coolant make-up system. The centrifuge has a disposal tank with level sensors and a discharge pump. The coolant make-up system includes a coolant concentrate holding tank, a gear concentrate pump and a digital hand-held refractometer.
Reducing cutting fluid use offers the chance for considerable cost savings. Tool life may even improve.
With their strong attention to routine housekeeping, it's not surprising that this shop carefully researched all methods for removing tramp oil from coolant in machine sumps. If tramp oil is allowed to build up in the coolant, the resulting shop odor, smoke generation and unpleasant conditions for the operators will quickly undermine all efforts to keep a clean shop and maintain an optimum working environment.
An expensive lesson that many shops learn too late is that the automatic oil system on their CNC machine tool may not be completely automatic. Since the automatic oil system is designed to give a warning when the oil tank is empty, many machinists simply assume all is well if the alarm doesn't go off.