input: [Foundry Process] Resin Shell Molding [Process] Resin-bonded silica sand is placed onto a heated pattern, forming shell-like mold halves. Pattern halves are bonded together with or without cores. Probably the earliest, most automated and most rapid of mold (and coremaking) processes was the heat-curing technique known as the shell process. Ejector pins enable the mold to be released from the pattern and the entire cycle is completed in seconds depending upon the shell thickness desired. The two halves of the mold, suitably cored, are glued and clamped together prior to the pouring of the metal. Shell molds may be stored for long periods if desired. Because of pattern costs, this method is best suited to higher volume production. [Pros / Cons] 
output: Advantages Adaptable to large or medium quantities Most ferrous / non-ferrous metals can be used. Rapid production rate. Good dimensional casting detail and accuracy. Shell molds are lightweight and may be stored almost indefinitely. Disadvantages Since the tooling requires heat to cure the mold, pattern costs and pattern wear can be higher. Energy costs are higher. Material costs are higher than those for green sand molding.