Due to the wide range of changes in the characteristics of the expanded raw materials, the twin-screw extruder requires the screw speed to be adjusted within a wide range. Its working principle is much more complicated than that of the single-screw extruder, and there are major differences in the specific structure, especially the machine. The arrangement of the barrel, screw, and thrust bearing gearbox is relatively complex, resulting in an increase in equipment costs. For example, a single screw uses a belt for one-stage transmission, while a twin-screw extruder uses a gearbox for transmission. Both have great advantages in manufacturing and transmission efficiency. difference.
Extrusion and puffing processing is a processing technology in which raw materials undergo high temperature, high pressure, and instant ripening. It integrates transportation, crushing, extrusion, mixing, shearing, high-temperature sterilization, and molding. It can process viscous, high-fat, and high-moisture content. The raw materials are incomparable with ordinary production processes, so they are increasingly used in the production of aquatic feed and pet feed.
