Designing custom injection molds for smartwatch straps often leads to unexpected $5,000+ re-tooling costs due to improper shrinkage calculations, wrong mold steel selection, and unoptimized gating systems. This B2B technical guide breaks down the top 5 tooling traps when creating custom FKM rubber and LSR silicone bands for Apple Watch Ultra 3, helping brands optimize DFM and lower unit costs at CONKLY factory.
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