A high-speed, high-shear, and high-dispersion two-stage extrusion granulation equipment

Abstract

The invention discloses a two-stage extrusion pelletizer with high revolving speed, high shear and high dispersion. The two-stage extrusion pelletizer comprises a first-stage single screw injection system and a two-stage double screw deep blending extrusion system, wherein the first-stage single screw injection system is connected with the two-stage double screw deep blending extrusion system through the manner that an injection head injects to a lateral feeding hole; a non-return ring is mounted on an injection single screw head of the first-stage single screw injection system; a material runner is formed in a barrel side of the two-stage double screw deep blending extrusion system; a circular trough is further formed in the barrel to reflux; a melt pump is mounted at a material outlet to pump the material; the two-stage double screw deep blending extrusion system drives an intermediate gear through a belt; the intermediate gear drives two screws simultaneously, so as to realize synchronous rotation of the two screws in the same direction. Through two-stage blending, the two-stage extrusion pelletizer disclosed by the invention can realize high revolving speed, high torque and high shear of the screws, so as to realize efficient dispersion of the material, is particularly suitable for blending and dispersing of a high filling system to greatly improve the working efficiency and the material quality.

Description

technical field [0001] The invention belongs to the field of modified plastic mechanical equipment, and relates to a high-speed, high-shear and high-dispersion two-stage extrusion granulation equipment, in particular to a high-mixing of modified additives and plastic particles by using a two-stage screw method Highly dispersed, and then directly extruded and granulated to obtain highly dispersed and uniform modified plastic particles. Background technique [0002] At present, twin-screw extruders have been widely used in the fields of plastics and rubber, especially the co-rotating parallel twin-screw extruders have excellent mixing effects and high processing efficiency, and are the most effective means for processing modified plastics. The twin-screw extruder can add solid raw materials such as polymer pellets or flakes to the screw part through the feed port, and plasticize the polymer material into a molten state through the combined action of heating and screw extrusion...

AI Technical Summary

Problems solved by technology

Therefore, the speed and torque of the traditional extruder cannot be improved very well, so it is often impossible to effectively achieve uniform mixing and dispersion of materials. At present, there is no precedent for an extruder that can achieve perfect mixing of molten materials.

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