PURPOSE: To obtain a stoke body for low pressure casting apparatus which does not develop the air leakage and reduces the defective casting, by cas-in- casting a collar part of the stoke with a high m.p. metal to form the flange.
CONSTITUTION: The silicon nitride-made collar part 8 is integrally formed at the upper position of the stoke 7 made of the same silicon nitride as ceramic. The collar part 8 of the stoke 7 is cast-in with the high m.p. metal-made flange 9 whose upper surface is the same plane as the upper end surface of the stoke 7 and lower surface is lower position than the lower surface of the collar part 8 to form the thicker thickness and outer diameter is larger than the diameter of the collar part 8 to form a columnar state, so as to become integrated form on the outer periphery of the collar part 8. By this constitution, the stoke body for low pressure casting apparatus in which the durable strength to the repeated pressing pressure is high and also, since a heat resistant seal is not used, operation for changing the seal is unnecessary and further, the air leakage is not developed and the defective casting, such as low hole, can be restrained is obtd.
INOUE YOSHIAKI
ANDO YUKIICHI
NAKAMOTO IKUHIKO
