Design for MIM — What Engineers Should Know
Converting a machined brass part to 304 MIM is a redesign exercise. Success depends on wall thickness uniformity, draft on internal cores, gate placement, sintering support strategy, and a plan for post-sinter machining on critical seals.
Applications
Brass valve body redesign
Uniform walls, isolated heavy sections, and shrinkage-compensated cavities.
Plumbing fitting conversion
Internal retention ribs and threads planned for post-sinter ops.
Manifold gallery optimization
Flow path improvements possible during conversion — not just material swap.
Pilot-to-production ramp
First-article inspection tied to OEM drawing tolerances.
Benefits for OEM Buyers
Faster feasibility decisions
Initial DFM feedback within 2 business days from STEP upload.
Lower mass-production risk
Gate and support design reviewed before hard tooling commitment.
Improved CFD performance
Internal geometry optimization often accompanies conversion.
Clear machining budget
Only critical interfaces machined post-sinter — predictable secondary cost.
Frequently Asked Questions
What wall thickness range works for MIM 304?
Generally 1.5–8 mm for consistent sintering shrinkage. Thinner sections risk green-part handling damage; heavy isolated sections cause warp.
How much shrinkage should we model?
Plan 0.5–1.0% linear shrinkage compensation in the mold cavity — validate on first articles.
What file formats do you accept?
STEP, IGES, SolidWorks, and PDF drawings via the contact form.
Get a free DFM review on your drawing
Upload your brass part CAD for conversion feasibility and gate proposal.
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