DESIGN FOR MANUFACTURE · Diecasting Mold ENGINEERING RESOURCES
Start with the part’s function
Before discussing a minimum wall or a draft value, identify the surfaces that control assembly, the loads the component must carry and the faces that will remain visible. These requirements explain which geometry can change and which must be preserved. A useful review begins with the controlled drawing and a model at the same revision.
Look at wall transitions, not a single dimension
A component can have an acceptable nominal wall and still contain abrupt transitions around bosses, ribs or intersections. Review the complete flow path and local sections rather than selecting a universal wall-thickness number. Where geometry changes are proposed, assess the effect on both function and the casting route.
Consider the release direction
Draft depends on the tool-release direction, local depth, surface finish and the alloy and process. Undercuts may require slides or another tooling solution. Discuss the parting line and permitted ejection marks early, especially on cosmetic or assembly surfaces. The agreed mold design records these choices for the specific part.
Keep machining and inspection in the discussion
A rib, boss or stock allowance can affect workholding and access after casting. Mark which faces, bores and threads will be machined, then choose practical datums and measurement methods. The goal of DFM is a manufacturing plan for the finished component; casting geometry is one part of that plan.
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