Bidirectional single screw extruder

Abstract

The invention discloses a bidirectional single-screw extruder, which comprises a machine barrel, wherein combined cutter heads, a lining and a conveying threaded module are arranged in the machine barrel; the combined cutter heads consist of two dynamic cutter heads and a static cutter head; the machine barrel comprises a machine barrel outer sleeve and a rotary middle sleeve; the machine barrel outer sleeve consists of a left part and a right part at a distance; the rotary middle sleeve is shaped like a cylinder, and the inside of the rotary middle sleeve is a through hole of which the cross section is a square reversed arcturus; the cross section of the static cutter head is a square reversed arcturus, and the shape of the static cutter head is matched with the through hole of the rotary middle sleeve; and the rotary middle sleeve, the static cutter head and the machine barrel outer sleeve all can be detached into two equal parts. The bidirectional single-screw extruder also comprises a power mechanism, wherein the chain of the power mechanism is positioned in the space between the two parts of the machine barrel outer sleeve and drives the rotary middle sleeve to rotate in a direction opposite to the rotation direction of a screw. When the bidirectional single-screw extruder is used, the static head and the dynamic heads perform opposite motion on the basis of the prior art, so that the material dispersion, shearing and conveying effects are excellent and energy is saved.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a bidirectional single-screw extruder. Background technique [0002] The combination of the two working principles of single-screw extruder and disc mixer overcomes the disadvantage of poor mixing ability of single-screw extruder in principle, and has become an important development technology in foreign extrusion processing. For example, the KCK machine, T-type machine, end mixer, tandem disc grinding machine, etc. that have appeared successively. The unified feature of this type of machine is that a disk working area composed of dynamic and static disks is established in the screw. Most of the mixing tasks It is transferred to this area for completion, and the mixing effect is very good, but practice has proved that because the dynamic and static discs of this type of machine have no conveying function, the material must be pushed through by the front and rear pressure differ...

AI Technical Summary

Problems solved by technology

[0002] The combination of the two working principles of single-screw extruder and disc mixer overcomes the disadvantage of poor mixing ability of single-screw extruder in principle, and has become an important development technology in foreign extrusion processing. For example, the KCK machine, T-type machine, end mixer, tandem disc grinding machine, etc. that have appeared successively. The unified feature of this type of machine is that a disk working area composed of dynamic and static disks is established in the screw. Most of the mixing tasks It is transferred to this area for completion, and the mixing effect is very good, but practice has proved that because the dynamic and static discs of this type of machine have no conveying function, the material must be pushed through by the front and rear pressure difference, the more "dead discs", the pressure energy The greater the consumption, the material transportation will be blocked, the flow will be unstable, the pressure will fluctuate greatly, and even degradation will occur.

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