Metal casting stainless steel design considerations and principles sand casting is basically the same. Since the metal itself is no concession type and permeability, and the cooling speed, so requirements are as follows. ① casting shape should be easy to make the casting unimpeded removed from metal mold. As the original design in Figure 2-1 carburetor housing, small parts in metal mold parting surface near the size of the internal cavity by large size, preventing removal of the casting after casting, to the original design of the metal part drawing design type, we need to increase the active block, the metal complex of the type, and can affect the accuracy of part size. Part Design Figure 2-1 after a change to the easy-open type, thus simplifying the design of metal type. So the shape of the part is the best direction along the cast removed from the tapered metal type, which is more easy to remove the casting.
② casting wall thickness should not be too big or too small, the structure should be conducive to the casting of molten metal crystallization sequence solidification. Irregular casting wall thickness should not differ too much, otherwise it will hinder the molten metal feeding. Figure 2-4.
.gif)
.gif)