The material couldn’t handle the temperatures for plastic injection. The temp is way above the max temp listed but I figured it was worth a try.
I have an aluminum frame that holds the prints for molding. This is by far the best way to go even for the small desktop machines.
Polypropylene is your friend. If you need the part to be stiffer use 10% glass filled material. It takes some looking to find glass filled but it’s worth it.