At site, 8no.s of CNC machines in a row had to be provided with suitable mist collectors. All CNC machines generated mist / fumes from neat cutting oil which had to be captured and the pollutants in the fumes are to be filtered effectively.
Our FumeKiller®, electrostatic filters are well-suited to capture and control fumes generated during machining processes in CNC machines. These fume extractors can be used for the control of oil mist (neat cutting oil) as well as coolant mist (water-based coolant). Lower suction capacity fume extractors (FumeKiller®) can be installed for individual CNC machines. In case of multiple CNC machines larger capacity fume extractors can be installed along with suitable ducting to capture and route the generated fumes from the CNC machines to the oil mist collector (FumeKiller®). For neat cutting oil fumes, we always recommend Dual-pass electrostatic filters to provide high-efficiency filtration of fumes / mist. For water-based coolant fumes / mist single -pass filtration extractors work satisfactorily.
The installation was carried out using our FumeKiller® model FK6000/5hp mounted on a low MS angle stand with a large oil collector tank below the stand. MS ducting was mounted above the row of CNC machines with droppers to connect individual CNC machines. Last- mile connections were provided using PVC flexible hose. Even though our standard FumeKiller® model FK6000/5hp uses a 3HP motor to drive the suction fan, in this case we used a 5HP driven suction fan to provide higher static pressure because of the length of ducting involved.
It was found that for a 2-shift operation, the filters within the oil mist collector filtered the pollutants for 4 weeks before getting choked. The cleaning cycle for the filters was established at 4 weeks. Just before getting fully choked, the filter module as well as the prefilters and postfilters are removed and cleaned using pressure water pump at about 110bar pressure. The filters are dried using a compressed air jet and repositioned inside the fume extractor. Adequate training was given to the maintenance technicians to handle the equipment. All safety features were explained and demonstrated. The equipment was found to be working satisfactorily.
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