Twin-screw extrusion device and processing method therefor

A twin-screw extrusion device, comprising:

• a barrel;
• a twin-screw mechanism comprising a first screw, a second screw and a drive assembly, wherein the first screw and the second screw are both rotatably connected to the barrel, the first screw is engaged with the second screw, the drive assembly comprises a plurality of idler gears and two mutually engaged elliptical gears, one of the elliptical gears is fixedly connected to the first screw, the other elliptical gear is synchronously rotatable with one of the idler gears, the plurality of idler gears are in transmission connection, and a last one of the idler gears is fixedly connected to the second screw, so that the first screw and the second screw are rotatable in a same direction;
• wherein the first screw is rotatable at a constant speed, a rotation speed of the first screw is ω1=N, an eccentricity of each of the elliptical gears is k, 0<k<0.8, an included angle between a connecting line of the first screw and the second screw and a long axis of each of the elliptical gears is φ, and a rotation speed of the second screw is ω2, satisfying
• ω
• 2
• =
• (
• 1
• -
• k
• 2
• )
• ⁢
• N
• 1
• -
• 2
• ⁢
• k
• ⁢
• cos
• ⁢
• φ
• +
• k
• 2
• .