Double screw extruder closed-end copper heater, model 75, including a crushing chamber. The chamber has two symmetrical annular grooves on the top, with an internal toothed ring in the center. Inside the grooves, sliding rods are set, with mounting rods at the top of the rods. A drive motor is positioned at the center bottom of the mounting rods, with a gear one at the output end of the motor, and a shaft two at the center bottom of gear one. The double screw extruder uses a copper closed-end heater for pre-treatment of the plastic to be heated,粉碎 larger plastic blocks, making the plastic into more compact pieces, which is more conducive to rapid heating and melting of the plastic. It can quickly stir the heated plastic, ensuring thorough mixing and blending of the material, dispersing clumps of plastic for faster melting.