Extruding screw for single screw extruder

Abstract

The invention discloses an extruding screw for a single screw extruder. The extruding screw is characterized in that the diameter of the tail part of the screw is greater than that of the head part of the screw, and the conic angle between the connection of the outer diameter of threads and the axis of the screw is 0.6-2 DEG; the material charging section, the compressing section, the metering section and the mixing section with double wedges arranged on the surface, of a single screw structure are distributed in sequence; the bottom diameter of the threads of the material charging section is the same as that of the threads of the compressing section and are parallel to the axis of the screw respectively; a plurality of spiral grooves with the rotating direction opposite to that of the threads of the material charging section are formed in the threads of the material charging section and the compressing section respectively; the bottom diameter of the threads of the metering section is parallel to the outer diameter of the threads, and the width of the spiral grooves close to the side of the compressing section is smaller than that of the spiral grooves close to the side of the mixing section, on the metering section. According to the invention, the extruding screw has the advantages that the extruding screw is simple in structure and convenient to process, the equipment investment is reduced a lot, the extruding screw can be widely applied to processing loose materials and plastic raw materials with high compression ratio and multi-components, the service life is long, and the energy consumption is low.

Description

technical field [0001] The invention relates to a screw rod of a plastic extruder, in particular to an extrusion screw rod of a single screw extruder. Background technique [0002] In the processing of plastics, it is difficult to extrude loose materials, high compression ratio, and multi-component plastics. At present, the extrusion of such plastics is mostly processed by parallel twin-screw or conical twin-screw extrusion device, which has the following disadvantages: 1. The equipment used for processing parallel twin-screw or conical twin-screw has large investment and high energy consumption. 2. The service life of parallel twin-screw and conical twin-screw is short and the production cost is high. Contents of the invention [0003] The object of the present invention is to provide an extrusion screw of a single screw extruder with simple structure, low manufacturing cost, easy processing and long service life, which can be widely used for loose materials, high compre...

AI Technical Summary

Problems solved by technology

At present, the extrusion of such plastics is mostly processed by parallel twin-screw or conical twin-screw extrusion device, which has the following disadvantages: 1. The equipment used for processing parallel twin-screw or conical twin-screw has large investment and high energy consumption. High degree of equipment wear; 2. The service life of parallel twin-screw and conical twin-screw is short, and the production cost is high

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