家用电器的铝合金件铸造时容易出现裂纹。采用下述方法可以获得无裂纹铸件。如图1所示,把凝固时应力集中小的优质纯铝液从浇包经分配锅注入铸型中,分配锅里还应剩余部分铝液。待铝液在铸型中稍稍凝固,便应按图2所示,再把凝固时应力集中大的铝合金液从熔炉经流槽及分配锅注入铸型中,与底板下降速度配合,连续浇铙便能获得图3所示的实心铸件。浇注铝合金时,由于凝固时应力集中,易产生过多的裂纹。应根据图1和2,按所需要的铸件长度,注入足量的铝合金液。乘铝液尚未凝固,再把应力集中小的铝液从浇包经分配锅注 Household appliances aluminum alloy parts prone to cracks when casting. Crack-free castings can be obtained using the methods described below. Shown in Figure 1, the solidification of the stress concentration of small high-quality pure aluminum from the ladle through the distribution of pot into the mold, the distribution pot should also be part of the remaining liquid aluminum. To be slightly solidified in the mold to be molten aluminum, it should be shown in Figure 2, then the solidification of stress concentrated aluminum alloy liquid from the furnace through the flow tank and distribution pot into the mold, with the floor with the rate of decline, continuous pouring铙 will be able to get the solid castings shown in Figure 3. Pouring aluminum alloy, due to stress concentration during solidification, easy to produce excessive cracks. According to Figure 1 and 2, according to the required casting length, sufficient aluminum alloy liquid injection. By aluminum liquid has not yet solidified, and then focus on a small concentration of molten aluminum from the ladle by the distribution of Note