Dry-jet wet-spinning jetting device and making method thereof

Abstract

The invention discloses a dry-jet wet-spinning jetting device and a making method thereof. The dry-jet wet-spinning jetting device comprises a flow regulating cover and a jetting plate which is installed inside the flow regulating cover, the upper end of the flow regulating cover is provided with multiple air inlets which are symmetrically distributed relative to the symmetry axis of the jetting plate, and the air inlets are connected with an air-supply device; the lower portion of the flow regulating cover is immersed into a coagulating bath to be sealed, and multiple air outlets are formed in the positions, located above the liquid level and close to the liquid level, of the flow regulating cover. By means of the immersed type flow regulating cover, it is guaranteed that on the condition that the jetting plate and jetting liquid flow are both in a stable atmosphere, the upwards oblique air outlets formed in a lower flow regulating cover body can prevent the liquid level from fluctuating, and meanwhile the air sealing effect of near liquid level is achieved. The angle of inclination of a shell of an upper flow regulating cover body is the same as that of a shell of a conical jetting cap, diffusion of air flow is achieved through parallel inclined planes, and the effect of uniform and gentle circulation can be achieved.

Description

technical field [0001] The invention belongs to the field of chemical fiber manufacturing engineering, and in particular relates to a dry-jet wet spinning spinneret and a manufacturing method thereof. Background technique [0002] The dry-jet wet spinning process is to raise the spinneret above the level of the coagulation bath, and the height can generally reach 10-40mm. After the spinning stock solution is sprayed from the spinneret, it must first pass through a high air layer to eliminate The outlet expansion effect of the polymer solution and the high positive draft of the liquid flow allow it to obtain a smaller diameter before entering the coagulation bath, which is conducive to the further double diffusion process in the subsequent coagulation bath. [0003] It is precisely because of this high-speed, high-power drawing process and small liquid flow diameter that the change of environmental factors in the air layer can easily cause liquid flow instability and even bro...

AI Technical Summary

Problems solved by technology

The manufacturing process of the one-piece spinneret is complicated. Due to its large number and area of ​​openings, the ratio of diameter to depth must be small enough to resist the deformation caused by high pressure, so the cost is high

The dry-jet wet spinning process has extremely high requirements on the quality of the spinning stock solution. Once the slow flow or clogging of individual spinneret holes occurs, it may affect the normal drafting of the surrounding tow. Therefore, for the integrated large-tow spinneret Said that even if a very few spinneret holes are unhealthy, their cleaning and maintenance need to be fully processed, which increases the maintenance cycle and cost, and reduces production efficiency

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