Abstract: Apparatus is disclosed for the heat treatment of thermoplastics containing industrial and domestic refuse, as well as plastics waste. The refuse or waste is previously comminuted to a size capable of being treated in the process, then fed into the apparatus which is a crushing roller press. The press has a rotatably driven roll in a machine body, the machine body and the roll forming a converging infeed gap and two crushing gaps along the circumference of the roll. Just before a charging hopper there is a discharge opening provided with an adjustable scraper.