| 摘要 |
PROBLEM TO BE SOLVED: To provide a new method for effectively washing a workpiece having an intricate internal cavity. SOLUTION: At least one of openings 32-40 of the workpiece 30 having the internal cavity 31 is used as an inlet and at least one of the other openings as an outlet. A washing liquid 16 is supplied through the inlet, and moved in the cavity 31 while turbulance is generated in the liquid 16, and discharged through the outlet. The flow rate at the largest cross section area part of the cavity is set at Rec×ν×S/(4×d) or higher, provided, however, that Rec: Rey Number; V: the flow rate;ν: kinematic viscosity of the washing fluid; d: the cross section area; S: the length around the cross section. The washing liquid is supplied through liquid supplying nozzles 11a-13 attachably and detachably stuck on the openings with a pump 22 for pressure-feeding the washing liquid to the liquid supplying nozzles. The liquid supplying operation of the liquid supplying nozzles is selectively actuated with nozzle selection means 24a-24c. Thereby, the turbulent washing water effectively moves a foreign substance in the cavity and removes the same from the workpiece. COPYRIGHT: (C)2005,JPO&NCIPI
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