Molds should be designed with generous radii and fillets wherever possible. A minimum radius of .020" (0.5mm) is recommended at all sharp corners and larger radii are generally beneficial when possible. However, making the radius too large will cause a sink mark on the opposite surface due to the greater mass of material.
How much more draft is needed when molds are textured?
1° draft plus 1.5° draft for each 0.001" (0.025mm) grain depth
Do vents close up?
Yes, and vent depth should be checked at each mold cleaning or PM.