WASHING APPARATUS AND METHOD

PROBLEM TO BE SOLVED: To wash an article to be washed within a short time by a simple mechanism. SOLUTION: In the washing tank 4 of a first washing part 2 in which a washing soln. 52 is stored, a feed basket 51 in which a plurality of core shafts 50 are housed at a predetermined interval is shaken up and down between the washing soln. 52 and the atmosphere by a first up and down shaking means 5 and the feed basket 51 in which the core shaft 50 washed in the washing tank 4 is moved to the washing tank 8 of a second washing part 3 in which the washing soln. 52 is stored and shaken up and down between the washing soln. 52 and the atmosphere in the washing tank 8 by the second up and down shaking means 9 and the core shafts 50 in the feed basket 51 drawn up from the washing tank 8 are subjected to shower washing within the washing tank 8. By shaking the feed basket up and down between the washing soln. and the atmosphere, the shearing force caused by gas-liquid interface passage is generated and the core shafts can be washed by this shearing force and, therefore, the whole of the core shafts can be uniformly washed by one up and down shaking and the contaminant such as an oil component of the core shafts can be removed within a short time.