Considerations for MIM/CIM Suitability
MIM part design principles are similar to plastic molded products. Uniform wall thickness is best for gradual transition where wall thickness must vary, coring thick cross sections for lower production cost and consistent dimensional control, radius corners and draft angles aiding in release from the mold.
MIM/CIM Components Should Be:
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150 grams or less in weight (typical average 50 grams or less) |
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Reasonably complex in design (combined components produced as one piece for increased cost savings) |
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Maximum wall thickness .5" (12.7mm) |
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Minimum wall thickness .005" (.13mm) |
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Flat surface on component prevents distortion during sintering. Custom trays with grooves or holes to allow for proper support are optional. |
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Tolerance Range
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Typical |
Best |
Angler |
+/- 2 deg. |
+/- .5 deg |
Dimensional |
+/- .3 % |
+/- .001" (.0254) |
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The flexibility of MIM component features may include: cross holes, angle holes, irregular shapes, undercuts and splines.
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Gate locations, critical for proper mold fill and similar to ejector pins and mold parting lines, leave witness areas on part surfaces. The location of these molded imperfections may interfere with function as well as cosmetics. It may be to a designer's advantage to work with us early in the design stage to optimize your part design for MIM. |
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