Rumination type plastic extruder screw and material extruding method

Abstract

The invention provides a rumination type plastic extruder screw and a material extruding method, and relates to a plastic extrusion screw and a screw material extruding method capable of effectively shortening the melting material process, improving the yield, plastifying quality and greatly reducing the probability of melting material decomposition caused by overheating and power consumption. Thescrew is composed of a main screw and a sub-screw. A melting segment of the front segment of the main screw is a hollow screw barrel, a conveying segment of the rear segment of the main screw is a solid segment with a power connecting shaft, and compared with a conventional screw, the length of the screw is reduced by 1/3 or above. The sub-screw is mounted in the hollow barrel of the main screw in a concentric circle manner, the hollow segment of the main screw is provided with an additional thread, an additional thread groove is formed, and through holes or long holes are formed in the bottom of the thread groove according to a certain density to form a screen-shaped bottom groove. The rumination type plastic extruder screw and the material extruding method have the advantages that the melting material process is shortened; the probability of melting material decomposition caused by overheating is reduced; power consumption is reduced; the material cost and the processing cost are reduced; and through the reduced draw ratio, the anti-twisting and anti-bending strength is improved.

Description

technical field [0001] The invention relates to a ruminant plastic extruder screw and extrusion method which can not only effectively shorten the flow of molten material, improve output and plasticizing quality, but also greatly reduce the probability of decomposition of molten material due to overheating and power consumption , which belongs to the field of plastic extruder component assembly manufacturing. Background technique [0002] In the prior art, in order to improve the high-efficiency conveying and plasticizing quality of the screw, usually efforts are made to change the thread form, kneading form, length-to-diameter ratio, and number of revolutions. Due to the complex motion mechanism different from the conventional rheological model in the plasticizing and melting process, it is difficult to control the production capacity and efficiency. Screws with various structural forms are independent. Despite continuous innovation, the conveying capacity and plasticizing ...

AI Technical Summary

Problems solved by technology

[0003] Disadvantages: First, the processing accuracy of the screw with a large length-to-diameter ratio is higher; second, the heat treatment level of the material is required to be improved; third, if the design is poor or the processing accuracy is not high, it will cause excessive shearing of the plastic and generate additional Shear heat; Fourth, the screw with a large length-to-diameter ratio is often equipped with a special-shaped mixing section, which wastes the length-to-diameter ratio and increases the processing difficulty; Fifth, the length of the screw cannot be extended; Sixth, the depth of the screw groove is impossible excessive increase

This restricts the improvement of output and plasticizing quality

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