There are many many sharp corners in every plastic product, what does a sharp corner mean? Sharp corners greatly increase the stress concentration during injection molding. it could lead to failure of plastic parts, especially for the high amount of stress concentration. So generally, as a mold or plastic produce designer, when he or she meet that kind of sharp corner, they need to be radiused, The stress concentration factor varies with radius, for a given thickness. Do you know how to evaluate it?we will discuss it in the next time.

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