| 摘要 |
PURPOSE:To stably cast a good quality casting without any sand inclusion by setting a chiller providing penetrating holes for packing molding sand to circumference of a pattern and for evacuating at the prescribed position on the pattern. CONSTITUTION:The molding sand is charged at between plastic film 16 coating on the pattern 13 and plastic film 17 coating on opening face of a flask 14. By evacuating in the flask 14 and pushing the molding sand in the flask 14 with the air atmosphere, the mold is formed. Then, the chiller 22 providing the penetrating holes 23 functioning to pack the molding sand to the circumference of the pattern 15 and evacuating, is set to the prescribed position on the pattern 13. By this method, the mold being faithful to the pattern can be molded. |
