Double-screw extrusion element and double-screw extruder

Abstract

The invention discloses a double-screw extrusion element and a double-screw extruder. The double-screw extrusion element includes a first screw and a second screw; the first screw and the second screw are both provided with screw flights; the first screw and the second screw are of a double-screw structure which is partially engaged in the same direction, and the screw flights are spiral and are arranged on the surfaces of the screws in a surrounding manner; and a plurality of pin groups which are axially arranged are arranged on the screw flights, and pins are cylindrical. The screws are combined with the pins, the pins are designed on the screw flights of the screws, and the pins are axially arranged, so that the frequency of fluid flow beams can be increased, materials are continuously separated, combined, crossed or changed in direction in the flowing process, the materials can be effectively divided, the flowing condition of the materials is changed, and the mixing capacity of the screws is further enhanced. Meanwhile, friction conveying is mainly adopted for material conveying, and the characteristic of large yield of a single-screw extruder is reserved.

Description

technical field [0001] The invention relates to the technical field of rubber extrusion, in particular to a twin-screw extruder and a twin-screw extruder. Background technique [0002] Extrusion molding is the main molding method in the field of polymer material processing. Extruder is the main processing machine for extrusion molding. Single-screw extruder and twin-screw extruder are two widely used extruders. The key components of the extruder, the screw flight structure and the extrusion process determine the performance of the extruded product. Stronger mixing ability and efficiency are the main research directions of the current extruder. [0003] When the pin screw is used in the extruder, the melting process is accelerated due to the shunt mixing and shearing action of the pin, and the solid small block material broken by the pin alternates with the liquid material shunted by the pin, increasing The contact area and frequency are improved, the heat distribution is un...

AI Technical Summary

Problems solved by technology

[0005] Currently, the pin mixing elements used in the production of rubber mostly arrange the pins in the screw groove in a certain arrangement in a tangential direction, mainly to improve the distribution and mixing effect, the improvement of the dispersion effect is not obvious

Another pin-screw extruder is a reciprocating single-screw mixer. This kind of extruder also arranges pins tangentially. During the radial rotation, the screw reciprocates axially at the same time. Slide once, although the mixing performance is better than ordinary pin-screw, there is still room for improvement

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