the full length of the pelletizing machine
the full length of the pelletizing machine
In operation it is seen that the material to be pelletized such as, but not limited to, limestone or gypsum and an appropriate binder and activator, is fed into the inlet opening 90 with moisture being added from the nozzles 92 whereupon mixing and pet recycling occurs as the material is worked by the rotor assembly 26 which moves the material as it is mixed the full length of the pelletizing machine to the discharge opening 40 where the material is discharged as pellets.
A preferred embodiment of the extruder machine is 30 inches wide by 36 inches deep and 10 feet in length and the rotor assembly is operated by approximately 100 r.p.m. by a 40 horse power motor. The high speeds of the rotor assembly throw the material outwardly and provide high intensity mixing while violently stirring the twin screw extruder . The blades 70 have a plow action as they move through the material. The special design of the blades 70 wherein they are symmetrical in shape and include flat converging surfaces meeting to form a sharp leading edge whereby material buildup which is shedded does not produce lumps and oversized pellets.
The same is true with the unique trough construction wherein rubber is used to provide flexibility and the spring action produced by the springs 50 tending to resist the rotation forces of the rotor assembly 26 maintains the trough in a continuous state of flexing thus preventing material buildup on the trough, as seen by the dashlines in. The weir 42 is only high enough at the discharge end to prevent unpelletized small fines and lumps from being discharged. Thus it is seen that a variety of different types of finely divided materials may be pelletized by the combined mixing and pelletizing action of this machine which produces pellets of a uniform size.
In operation it is seen that the material to be pelletized such as, but not limited to, limestone or gypsum and an appropriate binder and activator, is fed into the inlet opening 90 with moisture being added from the nozzles 92 whereupon mixing and pet recycling occurs as the material is worked by the rotor assembly 26 which moves the material as it is mixed the full length of the pelletizing machine to the discharge opening 40 where the material is discharged as pellets.
A preferred embodiment of the extruder machine is 30 inches wide by 36 inches deep and 10 feet in length and the rotor assembly is operated by approximately 100 r.p.m. by a 40 horse power motor. The high speeds of the rotor assembly throw the material outwardly and provide high intensity mixing while violently stirring the twin screw extruder . The blades 70 have a plow action as they move through the material. The special design of the blades 70 wherein they are symmetrical in shape and include flat converging surfaces meeting to form a sharp leading edge whereby material buildup which is shedded does not produce lumps and oversized pellets.
The same is true with the unique trough construction wherein rubber is used to provide flexibility and the spring action produced by the springs 50 tending to resist the rotation forces of the rotor assembly 26 maintains the trough in a continuous state of flexing thus preventing material buildup on the trough, as seen by the dashlines in. The weir 42 is only high enough at the discharge end to prevent unpelletized small fines and lumps from being discharged. Thus it is seen that a variety of different types of finely divided materials may be pelletized by the combined mixing and pelletizing action of this machine which produces pellets of a uniform size.
