The differences between a pin-type rubber extruder and a common cold feed extruder lie in the screw structure and the addition of pins.
In a pin-type rubber extruder, pins are inserted radially into the screw thread grooves from the circumference of the barrel. This design enables the rubber compound to be effectively sheared and mixed during the extrusion process, eliminating laminar flow and agglomeration, achieving good plasticization of the rubber compound, low rubber temperature, and energy conservation.
Additionally, due to the insertion of pins, the mixing, kneading, and plasticizing capabilities are enhanced. Under the same extrusion conditions, the working length of the screw can be shortened by 2D-4 compared to a common cold feed extruder. As the length-to-diameter ratio decreases, the residence time of the material in the barrel is reduced. The discharge temperature is lower, meeting the extrusion requirements of various production processes. Moreover, due to the improved screw structure, the driving power is reduced significantly.
