Making tooling for CF parts - vacuum epoxy infusion method:

Prep sacrificial board

PU foam pattern

Seal PU foam surface

Epoxy tooling coat

Smooth surface

Tooling gloss surface

Sacrificial shuttering

Gel coat

Glass-fiber tool

CF lay up

Vacuum epoxy into part

Remove bagging and peel ply

Silicone tooling for cast PU:

SLA printed parts used as patterns to create silicone mould tools. Two part PU then used to create functional parts at low cost. SLA print times far exceed PU material setting times. I found it viable to batch produce parts using this method.