A split-type screw mechanism for preventing viscosity reduction for a twin-screw extruder relates to the technical field of extruder screws. It comprises a feeding section, a first compression section, a vacuum conveying section, a first homogenizing section, a second homogenizing section and a second compression section which are sequentially connected in the material conveying direction in the barrel along the axial direction. The feeding section and the first compression section are both twin-screw structures, and the screw pitch of the feeding section is larger than that of the first compression section. The screw mechanism behind the first compression section adopts a split design; the barrel is divided into two branches from the tail end of the first compression section, and each branch is provided with a vacuum conveying section, a first homogenizing section, a second homogenizing section and a second compression section sequentially connected in the material conveying direction. The first homogenizing section, second homogenizing section and second compression section are all single-screw structures. The entire screw mechanism is placed in a high-temperature heating environment, wherein the ambient temperature of the first homogenizing section and the second homogenizing section is lower than that of the feeding section and the first compression section. The vacuum conveying section on the barrel is connected to a vacuum machine.
Country Code: CN
Application Number: CN202411422054.7
