When the shrinkage and shrinkage phenomenon of copper casting occurs, in fact, it is because the casting temperature is relatively high or low. In the following words, it is because the casting speed is relatively fast or too slow. Shrinkage and porosity of copper castings occur, that is, because of the inappropriate design of the pouring system, as well as the deficiency of the feeding effect of the riser, the position of the chills is not conducive to the solidification of the sequence.

In this respect, we should pay attention to adjust the casting temperature and casting speed. Then, we should pay attention to improve the gating system design. In this respect, it will facilitate us to carry out sequential solidification and increase its riser feeding capacity. It is reasonable to set the dark riser or use cold core to prevent the overheating of individual parts of its metal type.

In the face of the bottom casting phenomenon of copper casting, we should pay attention to the pouring speed of it can not be too slow, and the top casting time should not be too fast. In this respect, it is in fact to prevent the phenomenon of local overheating.

For the underpouring defects of copper casting, to a large extent, it is because of the relatively high impurity content, and the relatively low liquidity itself. Then, it is because the casting temperature is too low, or because the casting speed is too slow or the phenomenon of mold leakage will lead to the underpouring defects.