Embedded planetary-screw pulsation plasticizing exhaust extruder and method

Abstract

The invention provides an embedded planetary-screw pulsation plasticizing exhaust extruder, which comprises a screw mechanism, a cylinder, a feed inlet, an air outlet, a discharge outlet and an actuating unit, wherein the screw mechanism comprises a main screw and a plurality of planetary screws, and the axis of the main screw is coincident with the axis of the cylinder; the screw arris of the main screw is provided with a plurality of holes which are matched with the planetary screws; the planetary screws are respectively inserted in the holes of the screw arris of the main screw, embedded into a screw slot and distributed around the main screw; the axes of the planetary screws are parallel to the axis of the main screw; the actuating unit comprises pulsation gears, planetary gears and a pulsation-gear transmission mechanism; the planetary gears are fixed at the ends of the planetary screws and are engaged with the pulsation gears; and the pulsation gears are connected with the pulsation-gear transmission mechanism. The invention also provides an embedded planetary-screw pulsation plasticizing exhaust method implemented by the device. The embedded planetary screw pulsation plasticizing exhaust extruder and the embedded planetary-screw pulsation plasticizing exhaust method have the advantages of adjustable retention time, low energy consumption, thorough exhaust, good uniformity of phase structure control, and the like.

Description

technical field [0001] The invention relates to a polymer material plasticizing exhaust extrusion processing technology, in particular to an embedded planetary screw pulsating plasticizing exhaust extrusion device and a method thereof. Background technique [0002] In recent years, the field of polymer material processing has been moving towards the direction of energy saving, consumption reduction and green processing. High-speed machining, precision machining, material microscopic phase structure control and remote intelligence are the key development directions in the future. As a processing technology, from the raw material entering the equipment to the final product quality control, it has to go through several processes such as solid transportation, exhaust, melting, and melt transportation. At present, the widely used processing equipment mainly includes single-screw extruder, twin-screw extruder and so on. The material melt transportation process is mainly realized...

AI Technical Summary

Problems solved by technology

Traditional single-screw extruders cannot provide uniform interfacial stretching, and it is necessary to carry out mixing and mixing uniform performance control; twin-screw extruders only strengthen the mixing effect in the meshing zone, increasing the aspect ratio and optimizing the screw structure have reached The limit, the room for further improvement of the mixing effect is already very limited

As an essential equipment for engineering materials and reactive extrusion, the exhaust efficiency and thoroughness affect the processing process. The surface renewal frequency, the contact state of the material and the machine wall are very important to the exhaust, and the pressure pulsation effect is induced during the exhaust process. These It must be considered when strengthening the exhaust, but the existing structure cannot solve this problem well

Because the existing plasticizing and venting extrusion structures and methods have the following defects: (1) cannot provide uniform interfacial stretching, the uniformity of mixing performance is difficult to control, and the corresponding residence time of fluid micro-elements is also difficult to control; (2) ) The structure is complex, and the mixing effect can only be enhanced locally, but not comprehensively; (3) Effective exhaust cannot be achieved during the melting process

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