Medical device design engineers increasingly are looking at metal injection molding (MIM) to produce precision components used in minimally invasive surgery.
One example is a mechanical introducer device made for STD Med, Inc., of Stoughton, MA, that contains five 17-4 PH stainless steel metal injection molded (MIM) parts: right and left cover, curved needle, curved needle linkage, and center linkage. The covers feature a complex three-dimensional geometry incorporating assembly pins and slots for moving the internal parts that require smooth action for suturing.
Using the metal injection molding (MIM) process provided a 70% cost savings over equivalent machined parts, according to an official at Parmatech. The parts in the mechanical introducer device are assembled by STD Medical, which also performs laser welding on the cover seam/joint. The parts are made to a density of 7.65 g/cm3....