Plate-cleaning device for spinneret plate

Abstract

The invention discloses a plate-cleaning device for a spinneret plate. The plate-cleaning device comprises a jetting unit, a suction unit and a slow cooling plate arranged between the jetting unit and the suction unit and capable of being heated by electrifying, wherein the jetting unit comprises a steam jetting hole for jetting steam to the surface of the spinneret plate along an upward inclined direction; the suction unit comprises a first suction port and a second suction port for sucking surrounding floating monomers and monomer flocculation blown by the jetting unit; the jetting unit and the suction unit are respectively clung to the two sides of the slow cooling plate; the slow cooling plate can transfer heat with the jetting unit and the suction unit as well as the surrounding air, so that a suitable temperature scope is kept. The suction unit continuously works and the jetting unit intermittently works, so that the plate-cleaning efficiency is ensured while an energy-saving purpose is achieved; the slow cooling plate can keep the temperature stability of an area where air is sucked away; the whole device has a reasonable and reliable structure and can effectively clean the spinneret plate, so that the normal spinning work is ensured.

Description

technical field [0001] The invention relates to a cleaning device of a spinneret for melt spinning. Background technique [0002] Melt spinning is widely used because of its small equipment scale and various process routes. Different functional masterbatches can be added to form functional fibers with different properties. However, when melt spinning PA6, PA66, PP, PA6+PET composite spinning and other raw materials , because the short-chain polymers in the chips are released from the tow in gaseous form after leaving the high-pressure spinneret. When the concentration of gaseous monomers reaches a certain value, they will aggregate into flocculated solids, and some of these flocculations will adhere to It is taken away on the tow, and most of it gathers on the surface of the spinneret. When the flocculation is large to a certain extent, the melt pool will be broken, resulting in uneven denier and even broken ends, which will affect production. Pay attention to the aggregati...

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Problems solved by technology

[0002] Melt spinning is widely used because of its small scale of equipment, diverse process routes, and the ability to add different functional masterbatches to form functional fibers with different properties. When spinning PA6, PA66, PP, PA6+PET composite spinning and other raw materials, because the short-chain polymer in the slice leaves the high-pressure spinneret and is released from the filament bundle in gaseous form, the concentration of the gaseous monomer reaches a certain level. When the value is high, it will gather into floc-like solids. Part of these flocs will be attached to the tow and taken away, and most of them will gather on the spinneret surface. When the flocs are large enough to a certain extent, the molten pool will be broken. It will lead to uneven denier or even broken ends, which will affect the production. When melt-spinning this type of high polymer, pay attention to the aggregation of flocculation and remove the flocculation in time.

[0003]At present, the method generally adopted in China is to interrupt the spinning process when there are too many flocculations, manually clean the spinneret surface, and re-spin after confirming that it is correct. A newer method is to install a monomer pumping device under the spinneret, and continuously extract the air near the spinneret, so that the air carries gaseous monomers to be extracted, and the concentration of the monomers is reduced to prevent the accumulation of flocculation in the spinneret. On the spinneret, however, the continuous extraction of air causes the flow of air near the spinneret surface, bringing cold air with a lower temperature, resulting in a decrease in the temperature of the spinneret surface, and affecting the state of the tow cooling zone, resulting in Uneven thickness of tow (commonly known as unevenness)

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