BOTTOM-POURING CASTING METHOD
PROBLEM TO BE SOLVED: To prevent occurrence of a surface defect caused by hydrogen, in the case of performing a casting by using a mold having the temperature near the outer air temperature and in the case weather condition is not good when the casting is carried out. SOLUTION: A bottom-pouring cast...
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| creator | NISHINO KAZUHISA |
| description | PROBLEM TO BE SOLVED: To prevent occurrence of a surface defect caused by hydrogen, in the case of performing a casting by using a mold having the temperature near the outer air temperature and in the case weather condition is not good when the casting is carried out. SOLUTION: A bottom-pouring casting method includes: raising the temperature of the inner surface of the mold 3 lowered to the temperature near the outside air temperature to zero-point temperature or higher by sending warm air generated by using a warm-air blower toward the inner surface of the mold 3 from the pouring hole at the upper part of a pouring tube 2 to heat the mold 3; and after that, pouring the molten steel 4 into the mold 3. In the case of performing the casting by using the mold having the temperature near the outside air temperature, even when the weather condition is not good when the casting is carried out, the defect caused by the hydrogen can be prevented and linear flaw on the outer surface of the product and gap defect just below the surface caused by the defect can be reduced. COPYRIGHT: (C)2008,JPO&INPIT |
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SOLUTION: A bottom-pouring casting method includes: raising the temperature of the inner surface of the mold 3 lowered to the temperature near the outside air temperature to zero-point temperature or higher by sending warm air generated by using a warm-air blower toward the inner surface of the mold 3 from the pouring hole at the upper part of a pouring tube 2 to heat the mold 3; and after that, pouring the molten steel 4 into the mold 3. In the case of performing the casting by using the mold having the temperature near the outside air temperature, even when the weather condition is not good when the casting is carried out, the defect caused by the hydrogen can be prevented and linear flaw on the outer surface of the product and gap defect just below the surface caused by the defect can be reduced. 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SOLUTION: A bottom-pouring casting method includes: raising the temperature of the inner surface of the mold 3 lowered to the temperature near the outside air temperature to zero-point temperature or higher by sending warm air generated by using a warm-air blower toward the inner surface of the mold 3 from the pouring hole at the upper part of a pouring tube 2 to heat the mold 3; and after that, pouring the molten steel 4 into the mold 3. In the case of performing the casting by using the mold having the temperature near the outside air temperature, even when the weather condition is not good when the casting is carried out, the defect caused by the hydrogen can be prevented and linear flaw on the outer surface of the product and gap defect just below the surface caused by the defect can be reduced. 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| language | eng |
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| subjects | CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING |
| title | BOTTOM-POURING CASTING METHOD |
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