A planetary multi-screw extruder

Abstract

The invention provides a planetary multi-screw extruder. Compared with the existing single-screw and double-screw extrudes, the planetary multi-screw extruder has more functions of shearing, blending and mixing of a shearing area, can effectively realize uniform shearing and is good in mixing effect. A screw mechanism arranged in an outer barrel comprises a center screw and planetary screws uniformly distributed at the periphery of the center screw, a center screw driving shaft is arranged at the end part of the outer barrel positioned at the end of a discharge hole, the leading-out end part of the center screw driving shaft is connected with a main motor, the center screw driving shaft is connected with one end of the center screw to drive the center screw to rotate, the other end of the center screw is tightly propped by a baffle, a planetary screw driving shaft is arranged at the end part of the outer barrel positioned at the end of a feeding hole, the leading-out end part of the planetary screw driving shaft is connected with a secondary motor, one end of the planetary screw passes through a perforated cover plate connecting coupling connected with the baffle to be connected with the planetary screw driving shaft and drives the planetary screw driving shaft to rotate, the other end of the planetary screw is tightly propped by a sealing cover plate at the other end of the outer barrel, the center screw and the planetary screw are both provided with corresponding first mixing areas, second mixing areas and third mixing areas along an axial direction.

Description

technical field [0001] The invention relates to the technical field of extruder equipment, in particular to a planetary multi-screw extruder. Background technique [0002] In recent years, with the development of engineering plastics in the direction of high quality, high performance and low cost, the diversification and compounding of plastic products have appeared worldwide. Correspondingly, it is necessary to develop High-performance screw extruder with high shear force; single-screw extruder and twin-screw extruder are the most widely used for extrusion processing of general materials, but single-screw extruder and twin-screw extruder are suitable for glass PVC For powder processing, due to the power of the material moving forward, the material will wrap the screw and rotate together, so that the thread cannot play its role of propulsion. At the same time, it is limited by the limited shear zone, the shearing of the material is uneven, and the screw The conveying capaci...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of engineering plastics in the direction of high quality, high performance and low cost, the diversification and compounding of plastic products have appeared worldwide. Correspondingly, it is necessary to develop High-performance screw extruder with high shear force; single-screw extruder and twin-screw extruder are the most widely used for extrusion processing of general materials, but single-screw extruder and twin-screw extruder are suitable for glass PVC For powder processing, due to the power of the material moving forward, the material will wrap the screw and rotate together, so that the thread cannot play its role of propulsion. At the same time, it is limited by the limited shear zone, the shearing of the material is uneven, and the screw The conveying capacity is average, the extrusion volume is unstable, the mixing effect is not good, etc.

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