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1、Use uniform wall thicknesses throughout the part. This will minimize sinking, warping, residual stresses, and improve mold fill and cycle times.
· Wall Section Considerations
· Voids and Shrinkage
· Warpage
2、Use generous radius at all corners. The inside corner radius should be a minimum of one material thickness.
·Radius Limitations
3、Use the least thickness compliant with the process, material, or product design requirements. Using the least wall thickness for the process ensures rapid cooling, short cycle times, and minimum shot weight. All these result in the least possible part cost.
4、Design parts to facilitate easy withdrawal from the mold by providing draft (taper) in the direction of mold opening or closing.
·Draft and Texture
5、Use ribs or gussets to improve part stiffness in bending. This avoids the use of thick section to achieve the same, thereby saving on part weight, material costs, and cycle time costs.
·Rib Design
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