A polymer injection mechanism for electrospinning nanofibers

A nanofiber, electrospinning technology, applied in fiber processing, textile and papermaking, filament/thread forming, etc., can solve problems such as large error in polymer supply, excessive needle injection, and decreased production efficiency, reaching the number of Appropriate, stable spinning, and the effect of improving quality

Active Publication Date: 2021-07-02
北京英鸿光大科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of polymer supply method of pressure push often has certain defects. The main defect is that the accuracy is low, which easily leads to large errors in polymer supply, less polymer supply, effective nanofiber density, and reduced production effect. However, if there is too much polymer supply, it will easily lead to excessive injection of the needle, resulting in clogging of the needle, affecting the progress of subsequent production, and restricting the improvement of nanofiber production efficiency.

Method used

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  • A polymer injection mechanism for electrospinning nanofibers
  • A polymer injection mechanism for electrospinning nanofibers
  • A polymer injection mechanism for electrospinning nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A polymer injection mechanism for electrospinning nanofibers as shown in the figure is characterized in that it includes a polymer supply mechanism and a spinning needle, and the polymer supply mechanism includes a polymer storage tank, a metering pump, and a quantitative supply tube and a polymer supply pipeline, the spinneret needle includes a nozzle body and a detachable needle unit, the polymer storage tank and the metering pump are connected through pipelines, and the quantitative supply pipeline includes a motor, a gear reducer, a gear The polymer supply mechanism is connected with the spinneret through the pipe joint and the polymer supply pipeline, and the polymer is quantitatively supplied to the spinneret.

[0027] The above-mentioned polymer injection mechanism for electrospinning nanofibers, wherein the motor is connected to a gear reducer, a gear set is connected to the transmission shaft of the gear reducer, and the shaft is driven to rotate by the gear set...

Embodiment 2

[0031] In the spinning needle of this embodiment, the nozzle tube is provided with a nozzle pipe for polymer supply, a nozzle distributor for uniform distribution of the polymer, and a nozzle inner cavity for the polymer to flow to the needle unit. The number of units is multiple, and multiple needle units are detachably and hermetically connected to the nozzle body, and are evenly distributed on the spherical end of the nozzle body;

[0032] Wherein, the nozzle pipe is a straight line pipe and communicates with the nozzle distributor. The nozzle distributor is hollow spherical, and the surface of the upper half of the spherical shape is provided with a plurality of distribution channels for polymer circulation. Holes, a plurality of the distribution through holes are evenly distributed, and communicate with the inner cavity of the nozzle, the inner cavity of the nozzle is a hemispherical cavity, and communicated with the needle unit, the pipeline of the nozzle, the distributor...

Embodiment 3

[0035] In this embodiment, the needle unit is detachably and airtightly connected to the nozzle body through plugging, clamping or threaded connection;

[0036] Wherein, the needle unit includes a connecting portion and a needle tube, the needle unit is connected to the nozzle body through the connecting portion, and communicates with the inner chamber of the nozzle and the needle tube, and the needle tube is a flexible tube, and a plurality of soft metal wires are embedded in it , the soft metal wire is electrically connected to the connecting part, and the nozzle body is electrically connected to the needle unit;

[0037] Wherein, the soft metal wire is one of iron wire, copper wire, silver wire or aluminum wire.

[0038]Most of the existing spinneret needles are fixed and difficult to replace. In this embodiment, the needle unit is improved, replaced by a hose, and a conductive soft metal wire is implanted inside. During the electrospinning process, the soft metal The fila...

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PUM

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Abstract

A polymer injection mechanism for electrospinning nanofibers disclosed by the present invention includes a polymer supply mechanism and a spinning needle, and the polymer supply mechanism includes a polymer storage tank, a metering pump, a quantitative supply pipe and a polymer supply pipeline, The spinneret needle includes a nozzle tube body and a detachable needle unit. The nozzle tube body is provided with a nozzle pipe, a nozzle distributor and a nozzle inner chamber. The principle of the invention is simple and the design is reasonable. The injection stability of the needle head is improved, which indirectly improves the quality of the produced nanofibers. At the same time, the spinneret head is improved. The needle head unit can adjust the spinneret direction with the change of the position. The number is appropriate, which reduces the downtime maintenance time. The production efficiency of nanofibers is improved, and the polymer pressure in the inner cavity of the nozzle is controllable, which prevents violent injection of polymers and clogging of needles, and realizes fast and stable spinning, which can effectively improve spinning efficiency and spinning uniformity.

Description

technical field [0001] The invention relates to the technical field of nanofiber production, in particular to a polymer injection mechanism for electrospinning nanofibers. Background technique [0002] Nanofibers are mostly produced by electrospinning machines through electrospinning. [0003] In the process of electrospinning, the reconciled polymer solution supplies the polymer to the spinneret needle on the electrospinning machine through the polymer injection mechanism, so that the polymer solution is ejected from the needle and moves in the electrostatic stand. Electrospinning is performed to obtain nanofibers. [0004] The polymer injection mechanism of the existing electrospinning machine is usually carried out in the way of pressure push, by controlling the movement of the push rod to squeeze the polymer solution in the pipeline, so as to supply the polymer to the injection needle. This kind of polymer supply method of pressure push often has certain defects. The m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D01D1/09
CPCD01D1/09D01D5/0061D01D5/0069
Inventor 崔建中
Owner 北京英鸿光大科技有限公司
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