What's the flying edge of the casting?
In the call blank corner position will extend outward solidification body a bit thin, is the flash, like out like a thorn is called burr. Because the mold is not particularly tight and docking position the liquid infiltration casting caused by the past.
The whole mold good, only a little burr, the die assembly due to the docking surface, burr is more. So the embryos to be processed, polished to become the final product.
When casting, use mold, pour into the melt, melt the liquid, and then form after coolingMould a whole, there are a few blocks assembled together, cooling products out of the casting blank.