Hollow fiber spinning nozzle of insertion tube type

Abstract

The invention provides a hollow fiber spinning nozzle of an insertion tube type, comprising a bottom sheet, a middle sheet, an upper cover, a fastening bolt, an insertion tube fitting, a positioning base and a bolt. The fastening bolt connects the bottom sheet (1), the a middle sheet and the upper cover together so as to fix the whole framework of the nozzle; the insertion tube fitting is arranged in a hole of the middle sheet for spraying feed liquor, the positioning base is arranged in a hole of the middle sheet and connected with the middle sheet through threads, and the bolt is set to penetrate through the positioning base for positioning the insertion tube fitting. According to the nozzle structure of the invention, the concentricity of the nozzle is convenient to adjust so that the nozzle is convenient to take apart and clean and easy to assemble. The invention not only is convenient to use, but also can ensure the spinning quality, is favorable to being useding in mass production, can be conveniently to replaced with syringe needles of different specifications and be used for spinning bilayer or multi-layer composite hollow fiber and multi-core hollow fiber or processing a spinning nozzle with 1-36 holes or more.

Description

technical field [0001] The invention relates to a chemical fiber spinning nozzle, in particular to an inserted tube type porous spinning nozzle used for spinning hollow fibers. Background technique [0002] Spinning nozzle is the key component of spinning hollow fiber in the spinning machine. Insertion tube type spinning nozzle is generally used for spinning hollow fiber. The spinning dope is ejected from the ring gap between the outer wall of the tube and the spinning hole to form a hollow fiber wall. Therefore, the concentricity of the insertion tube and the spinning hole directly affects the uniformity of the wall thickness of the spun hollow fiber, that is, the quality of the hollow fiber. Due to the fixed tube seat structure of the currently used insertion tube spinning nozzle, the position of the insertion tube in the spinning hole is basically not adjustable, especially for the porous spinning nozzle, which mainly depends on improving the processing accuracy to solve...

AI Technical Summary

Problems solved by technology

However, in practical application, it is found that after the concentricity is adjusted at room temperature, under the condition of heating, due to the release of metal deformation stress, the concentricity is lost, which affects the spinning quality of the hollow fiber, so it cannot be produced normally.

At the same time, adjusting the concentricity by tapping the root of the injection needle is time-consuming and labor-intensive, and it is easy to cause damage to the needle seat of the injection needle

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