Abstract
The investigation is intended to find how the molten metal fills up the vertical sand mould. Fine wire of high electric resistance is inserted in a mould space where the metal is to be fiiled, and the change of wire resistance caused by rising up the metal is recorded using Braun tube oscillograph. The experiment has been carried out as to aluminum cast at 750°, and the following results are obtained. (1) With same gate, runner and pouring basin, the amount of metal passing through the ingate varies with the size of casting attached to it. (2) When the casting is comparatively large enough to the ingate, the metal will flow steadily. But when it is not so large, the metal will flow less steadily. (3) The metal rushed into the mould vacancy from ingate runs straight to the end of it and rises up there, but proper design of the mould can make the metal flow steadily.
