We’ve tried melting plastic in the oven in steel bowls with lids , but the plastic melts very un-evenly, and burns along the edges.
Maybe it would be easier to melt in a big tub in the oven?
We are doing experiments in sand casting, and are planning on making a solid plastic bench in one piece. The bench should end up weighing around 5 kgs or more.
Any ideas on how to melt and cast big amounts of plastic all at once?
Could we put it all in a rotating oil barrel with a bonfire underneath, like a heated concrete mixer?