PURPOSE: To reduce the consumption of a filter to filtrating sludge by filtrating the effluent of the respective layer by leading it to a filter after separating in two layers by leaving in a liquid tank the effluent after electrochemical machining.
CONSTITUTION: The effluent after electrochemical machining is left for a fixed time in a liquid tank 1, and the efflucent 9 contg. the floating sludge of the liquid tank 1 upper layer part a lot and the effluent 10 contg. the sludge of the lower layer part thereof not so much are led to filters 6, 7 separately. At this time the effluent 9 contg. a lot of sludges of the upper layer part is in a small quantity and the effluent 10 of the lower layer part does not contain much sludge, so clogging is hardly caused and the consumption of the respective filter 6, 7 is reduced.
ITO SHIN
SETO TAKAO
FUKUWA SHINJI
