How CAD/CAM Shapes Modern Injection Mould Design

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Injection mould design now runs as a digital workflow, starting with a 3D model of the plastic part built in software such as SolidWorks, AutoCAD, Mastercam or Siemens NX. Before any steel is cut, designers check for moulding issues like draft angles, uniform wall thickness and undercuts, which are cheapest to fix on screen. The parting line is then chosen and the model is split into core and cavity, with gating, runners, cooling channels and venting planned to control how plastic fills and cools. CAM software converts the finished design into CNC toolpaths, with EDM used for features cutters cannot reach, and the assembled tool is finally trialled on a moulding machine to refine the design. The article notes that CAD/CAM complements, rather than replaces, practical moulding experience.

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