abstract:Fusible core injection molding, also known as lost core injection molding, is a specialized plastic injection molding process used to mold internal cavities or undercuts that are not possible to mold with [cores. Strictly speaking the term "fusible core injection molding refers to the use of a fusible alloy] as the core material; when the core material is made from a [[soluble plastic the process is known as soluble core injection molding.