Tilting Gravity Casting Method for manufacturing Knuckle

摘要

A tilting gravity casting apparatus, a die includes a ladle that stores a molten metal and the molten metal is poured through a pouring gate into a cavity of the die when the die is tilted. The cavity accommodates a cylindrical protrusion for forming a closed-end hole in a bearing support portion of a knuckle, and the cavity has a pressing boss portion located along an axial line of the cylindrical protrusion. Before a die tilt step of tilting the die is completed, a press step of pressing the molten metal in the pressing boss portion by using a pressing pin and a pouring gate block step of blocking the pouring gate with a block member are initiated.

主权项

1. A tilting gravity casting method for manufacturing a knuckle by using a tilting gravity casting apparatus in which a die includes a ladle that stores a molten metal and the molten metal is poured through a pouring gate into a cavity of the die when the die is tilted,
with the cavity accommodating a cylindrical protrusion for forming a closed-end hole in a bearing support portion of the knuckle, and with the cavity having a pressing boss portion located along an axial line of the cylindrical protrusion, the method comprising: a die tilt step of tilting the die; a press step of pressing the molten metal in the pressing boss portion by using a pressing pin; and a pouring gate block step of blocking the pouring gate with a block member, wherein the press step and the pouring gate block step are initiated before the die tilt step is completed.