I am curious as to what other people are using to create neat parting lines for molds of complex parts and any associated techniques?
By complex parts I really mean parts with a hole in them, so it’s hard to make the parting line even and straight on both sides of the hole.
Creating a parting line (for me) is undoubtedly the most difficult, frustrating and tedious step of making a carbon fiber part.
I started out by creating a parting line out of epoxy putty that went slightly over the desired parting line height and then sanding it to the correct level afterwards. It was time consuming but it worked (eventually).
More recently, I started using silicone rubber. I bury just under half the plug in play doh with a dam around the perimeter. Then I fill it up to half way using a low (ish) viscosity silicone. It’s not cheap but it works perfectly. My recent parting lines have been both perfectly level and flat on both sides of the holes in my plugs.
I’d like to hear if anyone else here has a preferred trick they would be ok to share?
