一、前言 56机铸钢轴承中间体贯穿螺孔芯子并不复杂,但芯子较细,两端直径135mm,空刀部位直径150mm,且从工艺设计图——可以看出(见图)。两端上箱各有600mm×233mm×550mm,及460mm×200mm×550mm冒口,下箱两端均有内浇口,因此要求此芯有很好的耐热性和高温强度,否则易粘砂,造成出砂困 First, the foreword 56 machine steel bearing intermediate through the screw hole core is not complicated, but the core is thin, both ends of the diameter of 135mm, empty knife diameter 150mm, and from the process design - can be seen (see photo) . Both ends of the box each have 600mm × 233mm × 550mm, and 460mm × 200mm × 550mm riser, the lower end of the box has an inner gate, thus requiring the core has good heat resistance and high temperature strength, or easily sticky sand , Resulting in sand trapped