| 摘要 |
PURPOSE:To improve the dimensional accuracy of a lengthy casting by filling up dry sands in a flask after arranging a dissipating model in the longitudinal flask and executing casting under reducing pressure after rolling sideway of a mold. CONSTITUTION:The longitudinal flask 1 providing feet 14 and one pair of hanging metal is laid as facing the bottom plate 2 to downward. After forming a sand bed beforehand by charging dry sand 26, the dissipating model 16, a down gate tube 18, etc., are set, and the dry sand 26 is charged from the upper open part 4 and filled up as surrounding sufficiently around the model 16. Next, the open part 4 is closed and the flask body is hung up, and it is supported on the ground by the feet 14 as rolling sideway, to execute casting under reduced pressure condition, after setting a trumpet gate 27 in place of the cover 21. As the dry sand 26 is sufficiently charged to the lower part of the model 16 and the casting is executed after rolling sideway of the mold, the pouring metal is run to the each part. Therefore, the dimensional accuracy of the lengthy casting is improved. |
