A multifunctional adjustable two-stage extrusion unit

Abstract

The invention relates to a multifunctional adjustable two-stage extrusion unit, which includes a mixing feeding system, a metering feeding system, a switchable two-stage extruding unit, an auxiliary machine production line and a finished product delivery system; the mixing feeding system and the metering system The feeding system is respectively connected with the two-stage extrusion unit, and the auxiliary production line includes the water-stretched granulation auxiliary machine production line, the mold surface hot-cut granulation auxiliary machine production line, the water ring granulation auxiliary machine production line, and the underwater pelletizing auxiliary machine production line. The present invention provides a multifunctional adjustable double-stage extruder unit. The host part of the complete set of equipment can switch single / double-stage extruders, and has multiple sets of granulation auxiliary machine production lines, and is equipped with various feeders, machine barrels The length-to-diameter ratio is adjustable, and the advantages of mixing and feeding methods.

Description

technical field [0001] The invention relates to a multifunctional adjustable double-stage extrusion unit. Background technique [0002] The same-direction parallel double-stage extrusion unit is widely used in the mixing and extrusion of engineering plastics, modified plastics, wood-plastic materials, elastomer materials, high-filling masterbatches, color masterbatches, degradable materials, packaging materials, telecommunication cables, etc. out and granulate. Due to the different production process requirements of various materials, there are also great differences in the configuration requirements of the two-stage extruder unit. At the same time, the melt characteristics of various materials are also very different, resulting in differences in granulation methods, which require different granulation auxiliary production lines. [0003] At present, the single unit used for production and experiment mainly has the following problems: [0004] 1. The length-to-diameter ra...

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Problems solved by technology

[0004] 1. The length-to-diameter ratio requirements of the screw and barrel are different for the production of different materials. It is difficult for conventional two-stage extruders to adapt to the mixing and granulation of various materials.

[0005] 2. Some materials need to be mixed with a high-speed mixer to achieve the adsorption of liquids or surface treatment of powders; while some raw materials have high requirements for the accuracy of the addition ratio, and need to be added separately with a weight loss scale; therefore, a set of raw material supply system Can not meet the needs of a variety of raw materials

[0006] 3. The different proportions of powder and pellets of different materials lead to different feeding methods and sequences. Some powders (such as carbon black, etc.) need to be fed from the 3-4-section barrel downstream of the main feeding port by a side feeder. Some liquid additives need to be injected into and mixed with the melt at the back of the barrel

[0007] 4. The granulation method, the melt characteristics of different materials are different, it is difficult to adapt to a single granulation method, and the production capacity is reduced or even cannot be produced normally.

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