Balanced type triple-screw vibrating force field reinforced plasticizing mixing extrusion method and equipment

Abstract

The invention discloses balanced type triple-screw vibrating force field reinforced plasticizing mixing extrusion method and equipment. According to the method, an axial vibrating force field is added on a main screw of a triple-screw system, meanwhile, a bidirectional feeding manner is adopted, so that when the triple-screw system rotates, the main screw axially vibrates, and the material suffers from the shearing action and the axial vibrating extrusion grinding action at the same time in the triple-screw system, and thus increasing the mixing effect of the material. The equipment comprises a hydraulic excitation device, a triple-screw system, a measuring and control device, a driving motor and feeding hoppers, wherein two ends of the triple-screw system are respectively provided with the feeding hoppers, two ends of the main screw of the triple-screw system are respectively connected with the hydraulic excitation device and the driving motor, the measuring and control device is arranged at one side of the triple-screw system, and the driving motor and the hydraulic excitation device are respectively in electric connection with the measuring and control device. According to the invention, a conventional plasticizing mixing method is broken through, the vibrating force field is increased, and the plasticizing mixing effect of the material during conveying can be enhanced; and since bidirectional feeding is adopted, the axial resistance of the vibrating force field is eliminated.

Description

technical field [0001] The invention relates to the technical field of polymer molding, in particular to a balanced three-screw vibration field-enhanced plasticizing mixing extrusion method and equipment. Background technique [0002] In recent years, the plastics industry has developed towards high quality, high performance, and low cost. Correspondingly, it is necessary to develop screw extruders with high efficiency, energy saving, and strong material adaptability. Mixing extruders include single-screw, twin-screw and multi-screw, and three-screw extruder is a new type of plastic modification mixing extrusion equipment. [0003] The utility model patent with publication number CN203919658U discloses a three-screw extruder. In this extruder, three screws are composed of a long screw and two short screws. The front half of the long screw is in the feeding barrel, and the long screw The second half is in the extrusion barrel, the first short screw and the second short screw...

AI Technical Summary

Problems solved by technology

[0004] However, among the above three three-screw extruders, the first two three-screw extruders use the mechanism of external heat source and mechanical shearing to achieve material plasticization and mixing, and use the method of simply increasing the meshing area to improve The plasticizing and mixing effect of the material has not broken through the original plasticizing and mixing mechanism, and its plasticizing and mixing effect is still difficult to be better improved

Although the third type of three-screw extruder breaks through the traditional plasticizing and mixing mechanism, that is, superimposes a vibration force field on the middle main screw to strengthen material extrusion and grinding, but in practical applications, the central main screw realizes axial vibration When it is seriously affected by the strong resistance of the material in the extrusion direction to the screw, it is difficult to achieve vibration (especially large-amplitude vibration), which seriously affects the vibration of the main screw in the middle of the three-screw extruder superimposed by a vibration force field. It is impossible to realize the periodic change of axial meshing tooth clearance and the goal of strengthening plasticizing and mixing for material grinding and extrusion

Therefore, the plasticizing and mixing effect of the three-screw extruder needs to be further improved.

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