如何设计熔模铸造铸件浇冒口

•Run simulation on “naked” single casting

•进行“裸件”（单独铸件，不带任何浇冒口系统）模拟•Shell mesh in ceramic material to required thickness •确定模壳材料及厚度后进行网格划分

•Run View Factor calculation

•运行视角因数计算

•Run SOLIDCast

•运行SOLIDCast

•Go to Riser Design Wizard

•转到浇冒口设计向导

Go to Riser Design Wizard 转到冒口设计向导

Select “Design Risers”

Then “Next”选择“设计冒口”然后点击下一步

One Feed Area identified –check “Plot Feed Area” then “Next”识别出一个补缩区-勾选“显示补缩区”然后点击“下一步”

Maximum casting modulus (Mc) identified as 0.56cm 识别出铸件的最大模数（Mc）是0.56厘米

Enter value near Max –say 0.55 then Click “OK”

输入接近最大值的一个值，-这里输入0.55然后点击“确定”

Contact point (area of max Mc) identified

识别最大模数的位置

•Modulus = volume/surface area or area/perimeter for long bars.

•If bar is square, length of side = 4x required modulus.

•模数=体积/表面积或者对于长杆形状铸件的话=表面积/周长，

•如果杆截面积是正方形，那么一边的尺寸=4x需要的模数

•Max Mc in this case = 0.56cm

•在这个案例中最大的模数Mc=0.56cm

•Riser (bar) modulus (Mr) should be 20% larger ie1.2(Mc) = 0.67

•冒口（模头）模数（Mr）应该是铸件模数的1.2倍=1.2x0.56=0.67

•For square bar, bar size = 4x required modulus = 4(0.67) = 27 mm square.

•正方形截面积的模头，模头尺寸=4x需要的模数=4x0.67=27平方毫米

•Contact neck modulus (Mn) (when poured through) should be equal to Mc (0.56). •冒口颈（浇口）模数（Mn）（模头-浇口-冒口）应该等于铸件模数Mc（0.56）•For square bar, bar size = 4x required modulus = 4(0.56) = 23 mm square.

•如果是正方形截面积的杆，其尺寸=4x需要的模数=4x0.56=23平方毫米

•Contact can be reduced by reducing length of contact (distance of casting from bar),•typically Mn= 0.6(Mc) if length of neck is less than smaller cross section of contact. •Therefore for short neck, contact Mn= 0.6(0.56) = 0.336.

•减小浇口的长度（铸件到模头的距离）可以减小浇口的尺寸，通常，如果浇口的长度•小于截面积的小边的话，Mn=0.6(Mc),因此，对于短冒口颈来说，Mn=0.6x0.56=0.336•For round neck, diameter = 4(Mn) = 4(0.336) = 13.4mm diameter.

•圆的浇口的话，直径=4（Mn）=4x0.336=13.4毫米直径

•Further reductions in diameter are possible if neck is “notched” and taken away •from casting at an angle of approx30 degrees. Notching neck also creates fracture •(break off) point for alloys such as white irons.

•如果冒口颈做成易割样式的话，其直径可以进一步降低，可以做成大约30度。

•易割冒口颈也产生断裂点。

Bar 模头27x27

Plane of symmetry镜像

Short Contact =14

mm diameter短浇口

=14毫米直径

30 deg

10

Run FLOWCast 运行FLOWCast 做流场分析

Run SOLIDCast运行

SOLIDCast做温度场分析

Plot of Material Density