Anti-adhesion screw extruder

Abstract

An anti-adhesion screw extruder of the present invention comprises an extruding tube, an extruding screw is arranged in the extruding tube, a screw shaft is arranged in the extruding screw, and the spinning assembly is in contact with the molten polymer Concave-convex anti-adhesion structures are provided on the surface of the parts, which can realize the anti-adhesion effect of polymer melt in the spinning assembly; the mechanism of the concave-convex anti-adhesion mechanism is: the concave-convex anti-adhesion structure includes concave parts and convex Part, the raised part is set higher than the surface of the part, using the support between points to reduce the direct contact between the high-viscosity polymer melt and the surface of the part, and forms a gas suspension under the action of the high-temperature and high-pressure melt Function, play a self-separating anti-adhesion.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to an anti-adhesion screw extruder. Background technique [0002] The earliest record of the melt spinning process comes from a British patent in 1845. In 1939, melt spinning was industrialized as a production process for the manufacture of nylon 66 fibers. The basic process of melt spinning includes material melting, extrusion from the micropores of the spinneret, and cooling and solidification of the melt stream. The finished filament can be wound into a bobbin or otherwise processed. In the process of melt spinning, the polymer is fed into the extruder, conveyed by the screw, plasticized, melted and then forwarded to the metering accumulator: the metering polymer ensures that the melt of the polymer can flow stably and evenly into the In the spinning assembly of the key component, the melt in the spinning assembly is filtered by the filter medium to remove impurities and air ...

AI Technical Summary

Problems solved by technology

Because the molten high-temperature polymer melt needs to be transferred and flowed in the spinning assembly, therefore, there will inevitably be contact between the high-temperature melt and the quality inspection of the spinning assembly, and it will inevitably be in the spinning assembly. There is adhesion on the inner wall. Although the inner wall of the spinning assembly can be processed to be smooth enough at present, the polymer adhesion caused by the inner wall surface has been greatly reduced. However, due to the processing accuracy and Due to the limitations of processing technology, it is difficult to make the inner wall completely smooth, which will still cause polymer adhesion; in the prior art, there is also a solution to add a lubricant between the polymer and the inner wall of the spinning component during spinning , which will have a certain anti-adhesion effect, but these added lubricants will inevitably enter the polymer, and then the properties of the polymer and the properties of subsequent spinning will have unpredictable effects, and it is not advisable

Due to the adhesion of the polymer during the spinning process, it is necessary to thoroughly clean the spinning group after the production plan of a batch is not completed. The cleaning of the spinning group will lead to a great consumption of time and cost, and There will still be some dead corners that are difficult to clean, which will adversely affect subsequent production

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