Extrusion screw for regenerating waste rubber

Abstract

The invention discloses an extrusion screw for regenerating waste rubber. The extrusion screw comprises a rod body and spiral edges, wherein the spiral edges are divided into a feeding section, a melting section, a mixing section and a discharging section, the melting section comprises a first melting section, a second melting section, a third melting section and a fourth melting section, the first melting section is composed of N cams arranged in the axial direction of the rod body, the top end connecting line of the N cams is a spiral line, and the spiral direction of the spiral line is thesame as the spiral direction of the feeding section; the second melting section is screw-edge protrusions with inverted V-shaped projections, and the screw-edge protrusions are uniformly distributed on the outer circumference of the rod body corresponding to the second melting section; and the third melting section is a single-rotor spiral edge which is the same as the spiral direction of the feeding section, and the fourth melting section is four-rotor spiral edge, the four spiral edges of the four-rotor spiral edge are uniformly distributed on the outer peripheral surface of the rod body corresponding to the fourth melting section, and the four-rotating spiral edges are the same as the spiral direction of the feeding section. The extrusion screw has the advantages that the number of thescrew edges is changed, continuously variable extrusion force can be applied in the flowing process of the waste rubber, so that the melting reprocessing of the waste rubber is realized.

Description

technical field [0001] The invention relates to the field of screw manufacturing, in particular to an extrusion screw used for regeneration of waste rubber. Background technique [0002] There is an existing Chinese utility model patent with the application number CN201821047393.1 titled "Double-stage Helicoid Exhaust Screw", which discloses a double-stage helicoid exhaust screw, including a first-stage screw and a second-stage screw. The first-stage The screw is provided with a feeding section and a compression section. The second-stage screw is provided with a decompression exhaust section and a metering section. The second-stage screw is provided with a No. 1 flight and a No. 2 flight. The pitches of the No. and No. flight are the same, the thread turns are the same, and they are staggered. The decompression and exhaust section and the metering section of the utility model adopt double-stage helicoids, which can divert the molten raw material coming from the compression ...

AI Technical Summary

Problems solved by technology

However, the change of flight of the screw is still less, and the material melting effect is still unsatisfactory, so the structure of the screw needs to be further improved

Images