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Fusible core injection molding
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 demoldable 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. This process is often used for automotive parts, such as intake manifolds and brake housings, however it is also used for aerospace parts, plumbing parts, bicycle wheels, and footwear.〔.〕〔.〕
The most common molding materials are glass-filled nylon 6 and nylon 66. Other materials include unfilled nylons, polyphenylene sulfide, glass-filled polyaryletherketone (PAEK), glass-filled polypropylene (PP), rigid thermoplastic urethane, and elastomeric thermoplastic polyurethane.〔.〕〔.〕
==History==
The first patent for this type of molding process was taken out in 1968, however it was rarely used until the 1980s. That is when the automotive industry took interest in it to develop intake manifolds.〔.〕〔.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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