The machine is equipped with inner tube and tire tread extrusion heads and can also be equipped with other extrusion heads as required by users. 2.Temperature measuring and indicating device install in the machine body. The feeding zone over 150 is equipped with side rolls for the enhancement of feeding capability. The screws and bushes are subjected to nitrogenation treatment to get enough strength and wear-resistance. 4.The reducer has a forced lubrication unit, which is featured by high transmission efficiency, long service life and low noise. The machine over 150 is driven by a variable-open type for easy rubber removal.