DIE CASTING METHOD OF CASTING HAVING THIN WALLED PART

摘要

PURPOSE:To eliminate the casting defect owing to the sticking of a molten metal to dies and to improve the quality of a casting having a thin walled part in die casting in which a molten metal is poured under pressure to die cavities by packing directionally the molten metal into the cavities so as to avert the thin wall forming part of the cavities. CONSTITUTION:The molten metal flow is directionally packed into the dies 2-5 by the front bottom part 114 of a gate 11 so as to avoid the direct press contact of the molten metal forced into the dies with the thin wall part 501 forming fins, etc. of said dies in the die casting of an air cooled-type engine cylinder, etc. for a motorcycle by the pressure pouring using the dies. The overheating at the thin walled part 501 of the dies 2-5 is prevented, by which the sticking of the molten metal is eliminated and the non-defective casting is obtd.