RIBS AND BOSSES

The design of moldable ribs and bosses is outlined on the following two pages. Once you understand the 66% rule the design of ribs is pretty much straight forward. Bosses however seem to be the #1 feature that must be redesigned for moldability.

RIBS......................................................................................BOSSES

These pages are not intended to be a comprehensive design guide to plastic rib and boss design issues. The aim here is simply to illustrate the most frequent MOLDABILITY violations that force redesign, tool modification, and delay product delivery.