Wrex Products, Inc. of Chico — home

Die Casting Design for Manufacturability (DFM)

Casting-friendly design reduces porosity, warp, and the amount of secondary machining a part needs. This page summarizes the checks we run on every die casting quote.

Molten metal being poured in a foundry
Representative industry photo · credits

Typical applications

  • New die cast part designs headed to tooling
  • Existing designs being evaluated for cost reduction
  • Parts moving from another die caster where design intent needs re-validation

Process overview

  1. 1

    Wall thickness review

    Checked for uniformity to reduce porosity and shrinkage risk.

  2. 2

    Draft and parting line review

    Draft and parting line location are proposed for reliable ejection and cosmetic result.

  3. 3

    Machining allowance planning

    Features needing tighter-than-as-cast tolerance are flagged for secondary machining allowance.

Part design considerations

  • Uniform wall thickness reduces porosity and warp
  • Ribs and bosses should transition gradually to avoid stress concentration
  • Features requiring tight tolerance should carry machining stock rather than relying on as-cast tolerance

DFM guidance

  • Bring designs to us before tooling is quoted — casting-specific DFM issues (porosity risk, ejection, trim access) are easiest to fix on the model, not the die
  • Tell us which features are functionally critical so machining allowance is planned in the right places

Quality controls

  • DFM findings documented and shared before tool build begins
  • First-article inspection validates the casting against the reviewed design

Secondary operations available

    Frequently asked questions

    What tolerance can I expect from as-cast features?

    As-cast tolerance varies by alloy, wall thickness, and feature location; we'll give you a specific tolerance expectation during DFM review rather than a generic number, and recommend secondary machining for anything tighter.

    Ready to talk about your project?

    Send your drawings or describe your part — an engineer will follow up, not a sales queue.