《铸工》杂志1979年第三期刊登的“保温冒口研究”一文中,提出了计算冒口尺寸的公式:(1－β)(V_r/V_c)=(A_r/A_c)·(b_r/b_c)+β……(1)(1－β)(V_r/V_c)=(A_r/A_c)＋β……(2)(1)式适用于保温冒口计算,(2)式一普通冒口的计算。(1)、(2)式中:V_rV_c—冒口和铸件的体积;A_rA_c—冒口和铸件的表面积,b_rb_c—冒口和铸件的造型材料蓄热系数;β—由于金属收缩和型腔变形需要补充的 A formula for calculating riser size was proposed in “Study of Insulating Riser” published by Castor Magazine in the third issue in 1979: (1-β) (V_r / V_c) = (A_r / A_c) · (b_r / b_c ) + β (1) (1-β) (V_r / V_c) = (A_r / A_c) + β (2) The equation (1) is applicable to the calculation of a thermal insulation riser Calculate. (1), (2) Where: V_rV_c-riser and casting volume; A_rA_c-riser and casting surface area, b_rb_c-riser and castings modeling material heat storage coefficient; β due to metal shrinkage and cavity deformation Need to add