9) While designing for uniform wall thickness what are some radius considerations when forming a corner?

Question

Question

Answer 1

Answer #1

The walls of the part usually meet the base at an angle greater than 90° because of draft given to the part.

If the walls are joined making a sharp corner then the wall thickness will not be uniform at the corners.

The maximum thickness at the sharp corner is about 1.4 times the nominal wall thickness.

This will result in longer cooling time accompanied by sink marks and warping.

Sharp corners have increased stress concentration.

At the time of flow their is a turbulence created at the corner which causes the air entrapment and weakens the moulding.

The problem can be overcome by giving radius at the corners.

Answer 2

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