Shell molding (corning process)
Shell molding (corning process): Process in which clay-free silica sand coated with the thermosetting resin or mixed with the resin is placed on a heated metal pattern for a short period of time to form a partially hardened shell. The unaffected sand mixture is removed for further use. The pattern and the shell are then heated further to harden or polymerize the resin-sand mix, and the shell is removed from the pattern.
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