Although component design is complex, following a few fundamental principles will help minimize problems during injection molding and in part performance. In some instances it may not be possible to incorporate or follow all the suggested advice but the guidelines should increase your understanding of designing with thermoplastics.
Design recommendations
Wall thickness
Ribs and profiled structures
Gussets or support ribs
Bosses
Holes
Radii & Corners
Tolerances
Coring
Undercuts
Draft angle