I'm new and just getting into carbon fiber work. I did my first mold and ended up with little success. My carbon fiber ended up gluing to my mold. This time i put 4 heavy coats of pva release agent to try and avoid this. What I really want to find out is making split moulds. Many of the parts i want to produce carbon fiber copies of have plastic parts on the back. Was thinking of 3d printing these and gluing them on or a split mold of some sort. any advice is welcomed.

Welcome to the Forum!

Sticking parts in your mould is a common early mistake so in a way its good to have got that out the way now!  Good application of release agents is vital to releasing your parts.  It's good you learned that lesson now on a small part rather than a much bigger expensive part!

3D printing and bonding on the reverse fixings is a good way to finish the panels. The reverse fixings are a common issue for many when laminating and need to be considered on a case by case basis.  Some people will take a cast of the fixings, then bond them in place, others will fabricate a new fixing from scratch.  You can even bond in "big head" fasteners which will give you threaded studs/captive nuts etc which can help with refitting the panel.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Thanks. I found out if you use a heat gun on the plastic part when trying to take it out of the mold it shrinks the plastics and pops right out. Will this work when removing the carbon fiber piece from the mold?

You shouldn't need to use a heat gun on a composite part to remove it from the mould. Too much heat on a part is likely to make it soften (if it hasn't been post cured yet) which may well ruin the part.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

I got the part out last night. but a lot of the blue release agent is on the mold piece. and area's that are coned upwards didn't get enough epoxy. I will upload a picture.

Not sure what the issue is? Did i press the carbon fiber down to hard?

traces of PVA on the part is fine, it just washes off.  The raised parts look like classic bridging where the fabric has not been pressed fully into the corners thus leaving a void.  Sometimes this fills with resin, otherwise it stays as an air void which looks a lot worse.  You need to take more care with placing the fabric into the mould to ensure there is no bridging.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

When I was pressing it down, it was like an air pocket that wouldn't go away. No matter how much i pressed it down it would lift up on the other side. Any advice to avoid this?

Not certain just what process that you are using to make the part (hand lay-up/vac bagging etc.) but using separate pieces of fabric for small sections where there's a change in contour can help with ensuring the fabric conforms better to the shape. A bit ofspray tack and a roller cutter can help you get neat cut lines and help with overall appearance of the finished parts. If working with a single piece of fabric, though, work from the centre outwards when laying the fabric in to help make sure that it doesn't bridge around tricky areas.