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The sharp corners should be avoided in the plastic parts, as it can impede from plastic melt flow, causing flaws on parts. Meanwhile, stress concentration can be easily generated in the sharp corners and further reduces the strength of parts. Therefore, adding radii in sharp corners is suggested.

3 Design Tips about Sharp Corners in Injection Molded Parts

This video will look at a common problem when designing parts for injection moulding, undercuts. The most common piece of advice you will get, is avoid them if you can, but sometimes you can’t. With this in mind, we will give a handful of tips that can help alleviate design issues caused by them.

20240119-Protolabs Insight: Undercut Fundamentals