Applications
The
window of economic advantage in metal injection molded parts lies in complexity
and volume for small-size parts. MIM materials are comparable to metal formed
by competing methods, and final products are used in a broad range of
industrial, commercial, medical, dental, firearms, aerospace, and automotive applications. Dimensional tolerances
of ±0.003 inches per linear inch can be commonly held, and far closer
restrictions on tolerance are possible with expert knowledge of molding and
sintering. MIM can produce parts where it is difficult, or even impossible, to
efficiently manufacture an item through other means of fabrication. Increased
costs for traditional manufacturing methods inherent to part complexity, such
as internal/external threads, miniaturization, or brand identity marking,
typically do not increase the cost in a MIM operation due to the flexibility of
injection molding.
Other
design capabilities that can be implemented into the MIM operation include
Batch codes, part numbers or date stamps moulded into parts; parts manufactured
to their net weight reducing material waste and cost; Density controlled to
within 95–98%; Amalgamation of parts and Complex 3D Geometries.
The
ability to combine several operations into one process ensures MIM is
successful in saving lead times as well as costs, providing significant
benefits to manufacturers. The metal injection moulding process is also
recognised as a green technology due to the significant reduction in wastage
compared to "traditional" manufacturing methods such as 5 axis CNC
machining for example.
There
is a broad range of materials available when utilizing the MIM process.
Traditional metalworking processes often involve a significant amount of
material waste, which makes MIM a highly efficient option for the fabrication
of complex components consisting of expensive/special alloys MIM is a viable option when extremely
thin walls specifications are required. Additionally, EMI shielding requirements
has presented unique challenges, which are being successfully attained through
the utilization of specialty alloys .
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