Fully-meshed co-rotating twin-screw extruder

Abstract

The invention discloses a fully-meshed homodromous double-screw extruder which comprises an extrusion frame body, a rotating shaft, a double-tooth rotating ring, two extrusion screws and a mounting base, and is characterized in that the extrusion frame body is fixedly connected to the upper end of the mounting base, the number of the extrusion screws is two, the extrusion screws are arranged in the extrusion frame body, and the rotating shaft is fixedly connected to the upper end of the mounting base; and the right sides of the extrusion screws are rotationally connected with the extrusion screws through bearings, a mounting supporting block is arranged on the left side of the interior of the extrusion frame body, the left sides of the extrusion screws are rotationally connected with the mounting supporting block through bearings, and threads of the two extrusion screws are matched with each other. The double-tooth rotating rings are arranged on the outer sides of the screw gears, the center gear is arranged in the middle of the two screw gears, the center gear can play an auxiliary supporting role on the screw gears, gear transmission is carried out through internal meshing, stress can be more uniform, and position deviation of the screws is prevented.

Description

technical field [0001] The invention relates to the technical field of extrusion molding, in particular to a fully meshing co-rotating twin-screw extruder. Background technique [0002] At present, about 33% of plastic processing is done on extruders. Extruders can be divided into single-screw extruders and twin-screw extruders. Twin-screw extruders are mainly in an "8" shape. The material in the extruder is conveyed forward in a way that the screw groove is not completely filled, which has the effect of forcing the material to move forward, and the twin-screw extruder also has a good dispersion and mixing effect on the material at the meshing point of the two screws. At the same time, the twin-screw extruder is divided into an intermeshing co-rotating twin-screw extruder and an intermeshing counter-rotating twin-screw extruder. The intermeshing co-rotating twin-screw extruder is at the meshing point, and the speed of the thread and the screw groove are opposite. , the rela...

AI Technical Summary

Problems solved by technology

[0003] The shortcomings of the current full-mesh co-rotating twin-screw extruder are: most of the screws of the current full-mesh co-rotating twin-screw extruder are only driven by unilateral gears. The weight of the screw cannot be effectively dispersed and supported, and the force of the gear transmission on one side is uneven. After a long time of use, the position of the screw will shift, which will affect the extrusion effect; Most of them are driven by belts, but the belt transmission efficiency is low, the life is short, and the belt has the characteristics of elastic sliding, which cannot guarantee a fixed transmission ratio

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