PRODUCING METHOD OF CASTING VESSEL AND DEVICE THEREFOR

摘要

PROBLEM TO BE SOLVED: To prevent the rise-up and also, to improve the workability and the dimensional precision. SOLUTION: A holding plate 6 is arranged in the inner surface of bottom part 5 of a bottomed porous cylindrical body-state fixed metal tool 1, and an upper pushing plate 9 is covered on the opening part 3 in the fixed metal tool, and this holding plate and the upper pushing plate are fixed with fixing bolts 7. A barrel heat-insulating plate 11 is fixed on the outer surface of the barrel part in the fixed metal tool and a bottom heat-insulating plate 12 is fixed on the outer surface of the bottom part. A lost foam pattern 20 is fitted on the outer surfaces of both heat-insulating plates and the pattern bottom part 22 is fixed to this bottom heat-insulating plate 12 and a pattern barrel part 21 is fixed to a barrel heat-insulating plate 11. This pattern bottom part is fixed to a lower pushing plate 27 through an outer bottom heat-insulating plate 25. The upper pushing plate and the lower pushing plate are connected through connecting bolts 30 and integrated to form a lost foam pattern unit U.