A part does not have one draft angle. The faces that scuff are usually the ones where shrink, texture and draw depth disagree — and where the drawing said nothi
A T1 parameter sheet records one machine on one afternoon. Move the tool to another press and the numbers stop meaning what they meant — what has to travel is t
Most mould problems are not found at T1 — they are written into the drawing months earlier. DFM is the last point where changing the part is still cheap, and it