What are the functions?In casting, do you melt the metal first and then the core?
The process of placing the core is called the core"In general, in order to form the convenience in process design, the model in certain parts of the profile, convenient for core,
The lower core is placed on the lower mold parting surface of the casting cavity, and then the upper cavity of the casting cavity is covered after the mud core is placed,
two other respectively in two in the sandbox, the core, the two molding process according to the sandbox centrosymmetric together, called the box.The box can then be poured
