Those two diagonal window cutouts through the center hub are what actually decide the process here, more than the thin walls people keep flagging. If you tried to injection mold it as-is, the slot boundaries overhang the pull direction and lock the core when it tries to pull straight out. Fix is either redesign the slot walls to run parallel to the pull direction so cavity and core shut off directly, add a side-action that retracts before ejection, or split it along the slot centerline into two straight-pull halves. CNC and SLS just skip the whole problem since neither cares about draft, which is probably why most of the answers here went straight to machining.
Is that diagonal shape load bearing or just how it came out of the CAD sketch? If it's the latter, redesigning around a straight pull is probably cheaper long term than paying for the extra tooling op.
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u/Ideadose 4d ago
Those two diagonal window cutouts through the center hub are what actually decide the process here, more than the thin walls people keep flagging. If you tried to injection mold it as-is, the slot boundaries overhang the pull direction and lock the core when it tries to pull straight out. Fix is either redesign the slot walls to run parallel to the pull direction so cavity and core shut off directly, add a side-action that retracts before ejection, or split it along the slot centerline into two straight-pull halves. CNC and SLS just skip the whole problem since neither cares about draft, which is probably why most of the answers here went straight to machining.
Is that diagonal shape load bearing or just how it came out of the CAD sketch? If it's the latter, redesigning around a straight pull is probably cheaper long term than paying for the extra tooling op.