Designing parts that are moldable and cost-effective
| Feature | Rule |
|---|---|
| Wall Thickness | Uniform: 1.5-3mm typical. Avoid changes >2:1 ratio |
| Ribs | Height = 2.5-3x wall, base = 0.5-0.6x wall. Add 0.5-1 draft each side |
| Draft Angle | Exterior: 1 deg minimum. Interior: 1.5-2 deg. Textured surfaces: 1 deg per 0.025mm depth |
| Corner Radius | Min = 0.5x wall thickness (stress reduction). Sharp corners = sink marks |
| Boss | OD = 2x ID, wall thickness at base = 0.6x nominal wall. Gusset for tall bosses |