What are the characteristics of Lost Foam Casting?

What are the characteristics of Lost Foam Casting?
Compared with the traditional sand casting, lost foam casting mass production process has the following characteristics:
(1) molded foam block models can then bonding combinations. Model shape (ie, shape castings) Basic without any restrictions.
(2) a fully consistent with the gradual shape, size shrinkage of only a thin metal foam model is retained in the mold to form a "real" mold instead of the traditional sand of the "cavity" mold (i.e., "empty -type ").
(3) its sand is no binder, without water, without any additions dry quartz sand.
(4) pouring the foam model of the liquid metal under the action of high temperature gasification continuously decompose, producing metal - model replacement process, not like the traditional "empty-type" Casting is a liquid metal filling process. Making a cast, we must "disappear" out of a foam model.