Polymer melt metering pump

Abstract

A polymer melt metering pump of the present invention comprises a pump body having a pump cavity and an inlet and an outlet, and concave-convex anti-adhesion is provided on the wall of the part of the metering pump that is in contact with the molten polymer. structure, which can realize the anti-adhesion effect of the polymer melt in the spinning assembly; the mechanism of the concave-convex anti-adhesion mechanism is: the concave-convex anti-adhesion structure includes a concave part and a convex part, and the convex part is higher than the inner wall surface of the component The setting uses the supporting function between points to reduce the direct contact between the high-viscosity polymer melt and the inner wall of the part, and forms a gas suspension effect under the action of the high-temperature and high-pressure melt to play a self-separating anti-adhesion.

Description

Technical field [0001] The invention relates to the technical field of textiles, in particular to a novel polymer melt metering pump. Background technique [0002] The earliest record of the melt spinning process comes from a British patent in 1845. In 1939, melt spinning was used industrially as a production process for manufacturing nylon 66 fibers. The basic process of melt spinning includes material melting, extrusion from the micro holes of the spinneret, and cooling and solidification of the melt stream. The finished filament can be wound into a bobbin or subjected to other processing. In the process of melt spinning, the polymer is fed into the extruder, conveyed by the screw, plasticized, and melted, and then forwarded to the metering pump: the metering polymer is accurately metered to ensure that the polymer melt can flow stably and evenly. The key component of the spinning assembly is that the melt in the spinning assembly is filtered by the filter medium to remove i...

AI Technical Summary

Problems solved by technology

[0007] Since the molten high-temperature polymer melt needs to transfer and flow in the spinning component, it is inevitable that the high-temperature melt will be in contact with the spinning component quality inspection, and it will inevitably be on the inner wall of the spinning component. There is adhesion. Although the inner wall of the spinning component can be processed smooth enough at present, the polymer adhesion caused by the inner wall surface problem has been greatly reduced. However, due to the processing accuracy and processing technology However, 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, so that It 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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