METHOD FOR DECIDING DIRECTION OF AEROFOIL AND METHOD FOR FORMING AEROFOIL HOLDING MASK

摘要

PROBLEM TO BE SOLVED: To decide a direction of an aerofoil in a filling processing of the aerofoil. SOLUTION: This device is equipped with a sprue plate member 62 for positioning a sprue plate and an aerofoil 10 of an ejection molding device, and a fixing fixture 56 having a reference face separated from the sprue plate 62 in a blade width direction. Also, a core having a portion with a same dimension as the aerofoil 10 is arranged in a gap 13, and a fluid mask member is arranged in the gap 13 and is hardened so as to form the mask for restraining the aerofoil 10. At that time, the core is held by the sprue plate 62 and the reference face in a manner that the core direction against the sprue plate member 62 and the reference face is equalized with that in the processing condition. Then, the mask material is cut in approximately blade direction so as to form a divide line. The mask is arranged in the fixing fixture 56 under the processing condition, and the aerofoil 10 is inserted in the mask. The direction of the fixing fixture 56 is decided against the sprue plate 62 in a manner that the aerofoil 10 is supported by the mask.