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Injection Molding Design Considerations

Simple and complex shapes can be injection molded, however certain design guidelines should be followed:

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Lighter colors hide flow patterns better than dark colors. Choose the right material from the table. Drawing dimensions should be of the final part - material shrinkage will automatically be considered in the design of the mold. Use raised text instead of recessed text when possible. Where walls meet at a 90 angle, round inside and outside to at least .05" radius - sharper outside corners can create molding problems and sharper inside corners will increase tooling cost. Keep holes at least .015" from edges. It should not be possible to fully hide a 0.3" diameter ball anywhere inside the material.

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