CN103114347B - Continuous fiber-manufacturing device - Google Patents

Abstract

A continuous fiber manufacturing device relates to an electrostatic spinning device. Provide a continuous fiber manufacturing device that can overcome the disadvantages of discontinuous liquid supply, large jet size difference, and surface solution solidification, and can ensure consistent fiber diameter and continuously electrospin nanofibers. It is equipped with a motor, a connector, a rotating shaft, an inducing roller, a needle point array, an annular liquid storage tank, a DC high-voltage power supply, a collecting plate, and a liquid supply device; the output shaft of the motor is connected to the rotating shaft through a connector, and the inducing roller is rotationally connected to the rotating shaft , the surface of the induction roller is provided with a gear ring, the needle point array is installed on the surface of the induction roller, a ring rack is arranged in the annular liquid storage tank, the ring rack meshes with the ring gear of the induction roller, and the positive pole of the DC high voltage power supply is connected to the ring solution tank , the negative pole of the DC high-voltage power supply is connected to the collecting plate, the collecting plate is arranged above the annular solution tank, the collecting plate is grounded, and the liquid supply device communicates with the annular liquid storage tank through the infusion tube.

Description

Continuous Fiber Manufacturing Plant

technical field

The invention relates to an electrostatic spinning device, in particular to a continuous fiber manufacturing device.

Background technique

Electrospinning has the characteristics of simple technology, low cost and pure physical stretching. It is very likely to become the mainstream manufacturing technology of nanofibers in the future. The efficiency of traditional electrospinning is extremely low, which seriously restricts the industrial application and commercialization of nanofibers.

With the maturity of electrospinning technology and the in-depth application research of nanofibers, domestic and foreign researchers have conducted a lot of related research and made some progress on the bottleneck of low yield.

Chinese patent CN200720076954.6 discloses a high-efficiency multi-needle electrospinning spinneret device, which is a natural extension of the traditional single nozzle. The mutual influence of the electric field between the heads, the high voltage applied, the poor spinning quality and the need for a booster pump, etc. Nigerian researchers (O.O.Dosunmu, G.G.Chase, W.Kataphinan, D.H.Reneker. Electrospinning of polymer nanofibres from multiple jets on a porous tubular surface. Nanotechnology 2006, 17:1123-1127) batch electrospinning of polymer nanofibres from multiple jets on a porous tubular surface. The polymer solution is slowly squeezed out of the hole, and under the action of a high-voltage electric field, multiple jets are generated and sprayed onto a layer of metal cylindrical receiving net surrounded by the periphery. This method needs an air pump to assist the liquid supply, the structure is relatively complicated, and there is a problem that the tube hole is easy to be blocked. Yarin et al. (Theron A, Zussman E, Yarin A L. Electrostatic field–assisted alignment of electrospun nanofibres. Nanotechnology, 2001, 12(3): 384-390.) Israeli researchers proposed a double layer containing ferromagnetic liquid The solution system is placed in a magnetic field and an electric field to realize batch electrospinning technology. Although this technology can solve the problem of needle clogging, it is easy to mix impurities in the polymer solution, which affects the quality of the fiber. In addition, the operation of the double-layer solution system is inconvenient, and the fiber diameter problems of poor uniformity. In addition, the ELMARCO company in the Czech Republic has designed a commercial electrospinning machine Nanospider. This device uses a metal cylinder instead of a traditional needle-point nozzle. During electrospinning, the metal cylinder is immersed in the polymer solution and rotates under the drive of the motor. The free surface of the nanofibers is disturbed, jets are generated, and nanofibers are finally obtained, but there are disadvantages such as residues that are not easy to clean.

Contents of the invention

The purpose of the present invention is to provide a continuous fiber manufacturing device that can overcome the shortcomings of discontinuous liquid supply, large jet size difference, and surface solution solidification, and can ensure consistent fiber diameter and continuously electrospin nanofibers.

The invention is provided with a motor, a connector, a rotating shaft, an inductive roller, a needle point array, an annular liquid storage tank, a DC high voltage power supply, a collecting plate and a liquid supply device;

The output shaft of the motor is connected to the rotating shaft through a connector, and the inducing roller is connected to the rotating shaft in rotation. The surface of the inducing roller is provided with a ring gear, and the needle point array is installed on the surface of the inducing roller. An annular rack is arranged in the annular liquid storage tank, and the annular rack and The ring gear of the induction roller is engaged, the positive pole of the DC high-voltage power supply is connected to the annular solution tank, the negative pole of the DC high-voltage power supply is connected to the collecting plate, the collecting plate is arranged above the annular solution tank, the collecting plate is grounded, and the liquid supply device is connected to the annular storage tank through the infusion tube. The tank is connected.

The motor is preferably a stepper motor.

The output shaft of the motor is preferably located on the center line of the central hole of the annular liquid storage tank, and the rotation shaft is preferably in a horizontal position and perpendicular to the output shaft of the motor.

The induction roller is preferably rotatably connected to the rotating shaft through a bearing, and the ring gear is preferably arranged in the middle of the induction roller.

The needlepoint array is installed on the surface of the inducing roller, preferably each needlepoint of the needlepoint array is screwed to the threaded hole provided on the surface of the inducing roller.

The needle tip array can be provided with 4 rows of needle tips, all of which are arranged axially along the inducing roller, and the interval angle between two adjacent rows of needle tips on the same circumference is 90 degrees.

Working principle of the present invention and beneficial effect are as follows:

When the device starts to work, first turn on the high-voltage power supply and adjust it to a certain voltage (such as 50kV), then start the motor, the rotating shaft starts to rotate, and the rotating shaft drives the induction roller to make a circular motion; due to the gear on the induction roller and the annular liquid storage tank The meshing of the ring rack in the center makes the inducing roller rotate around the central axis of the rotating shaft. At this time, the array needle tips on the inducing roller stir the liquid surface of the polymer solution, and the auxiliary solution overcomes the shackles of the surface tension of the free liquid surface, resulting in a Taylor cone and Under the action of an electric field, a large number of jets are formed, and through instability whipping and solvent volatilization, solid nanofibers are finally deposited on the collecting plate. The jet on the surface of the solution will disappear after a period of continuous spraying. Therefore, before it disappears, the array needle tip will move to this place or nearby to induce the next jet, and so on, and the nanofibers can be continuously electrospun. Because the size of the inducing roller and the tip is very small, the distance between the tip and the collecting plate is not much different from the distance between the liquid surface and the collecting plate, so the diameter of the fiber formed by a small amount of jets on the array needle tip is basically the same as that produced by the liquid surface; The induction roller has little interference to the electric field during the process of inducing the formation of the jet, which ensures the consistency of the fiber diameter. In addition, the liquid supply device provides solution to the annular solution tank through the infusion tube, so that the liquid level of the solution in the annular solution tank remains unchanged, and the continuous and stable production of fibers is realized.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure of the rotating shaft and the inducing roller in the embodiment of the present invention.

Fig. 3 is a schematic view of the use state of the embodiment of the present invention.

Detailed ways

Referring to Figures 1 and 2, the embodiment of the present invention is provided with a stepping motor 1, a connector 2, a rotating shaft 3, an inducing roller 4, a needle point array 5, an annular liquid storage tank 6, an annular rack 7, a DC high voltage power supply 8, a collection Plate 9 and liquid supply device 10.

The output shaft of the stepping motor 1 is connected to the rotating shaft 3 through the connector 2, and the inducing roller 4 is connected to the rotating shaft 3 in rotation. The needlepoint array 5 is installed on the surface of the inducing roller 4, and each needlepoint of the needlepoint array 5 is screwed to the threaded hole (not shown in Figs. 1 and 2) provided on the surface of the inducing roller 4. The induction roller 4 is composed of an induction wheel 41 , two ball bearings 42 , a sleeve 43 and a snap ring 44 , and the middle part of the induction wheel 41 is provided with a ring gear 45 . The inner ring of the ball bearing 42 is in interference fit with the rotating shaft 3, the left and right sides of the inducing roller 4 are axially fixed by the shaft shoulder of the rotating shaft 3, the sleeve 43 and the snap ring 44, and the inducing wheel 41 is in an interference fit with the outer ring of the ball bearing 42 , The ball bearing 42 is limited by the snap ring 44, and the sleeve 43 is in rotation with the rotating shaft 3. Taking the ring gear 45 as the reference, the needle tip array 5 is symmetrically arranged with 4 rows of needle tips along the axis of the induction roller 4, and the interval angle between two adjacent rows of needle tips on the same circumference is 90 degrees (that is, the 4 rows of needle tips are arranged in a cross shape) .

An annular rack 7 is arranged in the annular liquid storage tank 6, and the annular rack 7 meshes with the ring gear 42. The positive pole of the DC high-voltage power supply 8 is connected to the annular liquid storage tank 6, and the negative pole of the DC high-voltage power supply 8 is connected to the collecting plate 9. The collecting plate 9 Set above the annular liquid storage tank 6, the collecting plate 9 is grounded. The liquid supply device 10 communicates with the annular liquid storage tank 6 through a liquid infusion tube 101 .

The output shaft of the stepping motor 1 is located on the center line of the central hole of the annular liquid storage tank 6 , and the rotating shaft 3 is in a horizontal position and perpendicular to the output shaft of the stepping motor 1 .

Referring to Fig. 1 and Fig. 3, when the stepper motor 1 rotates, the connection of the connector 2 drives the rotating shaft 3 to make a circular motion around the center of the annular liquid storage tank 6, and simultaneously drives the induction roller 4 to make a circular motion. Since the ring gear 45 of the inducing roller 4 meshes with the ring rack 7 in the annular liquid storage tank 6 , the inducing roller 4 also rotates while revolving around the rotating shaft 3 . The pinpoint array 5 installed on the induction roller 4 continuously induces the surface of the solution to generate a jet according to the path and movement mode of the induction roller. The polymer solution in the annular reservoir 7 forms nanofibers on the collecting plate 9 under the action of the electric field of the needle tip array 5 . The arrows in FIG. 3 indicate the direction in which the rotating shaft 3 moves in a circle around the center of the annular liquid storage tank 6 . The curved line in Figure 3 represents the nanofiber jet.

In actual application, the number and arrangement of the needle points of the needle point array 5 can be set according to the needs, preferably arranged in a single row, and the distance between each needle point is appropriate, which can reduce the mutual interference between the initial jets.

Claims (6)

1. continuous print fiber fabrication setup, is characterized in that being provided with motor, connector, turning cylinder, induction roller, pinpoint array, annular reservoir, DC high-voltage power supply, collecting board and liquid feed device;

Motor output shaft is connected with turning cylinder through connector, induction roller and turning cylinder are rotationally connected, induction roller surface is provided with gear ring, and pinpoint array is installed on induction roller surface, is provided with annular rack in annular reservoir, annular rack engages with the gear ring of described induction roller, DC high-voltage power supply positive pole is connected with annular solution tank, and DC high-voltage power supply negative pole is connected with collecting board, and collecting board is located at above annular solution tank, collecting board ground connection, liquid feed device is communicated with annular reservoir by woven hose.

2. continuous print fiber fabrication setup as claimed in claim 1, is characterized in that described motor adopts stepper motor.

3. continuous print fiber fabrication setup as claimed in claim 1, is characterized in that described motor output shaft is positioned on the center line of annular reservoir centre bore, and described turning cylinder is horizontal and vertical with motor output shaft.

4. continuous print fiber fabrication setup as claimed in claim 1, is characterized in that described induction roller is rotationally connected by bearing and turning cylinder, and described gear ring is located in the middle part of induction roller.

5. continuous print fiber fabrication setup as claimed in claim 1, is characterized in that described pinpoint array is installed on induction roller surface, makes each needle point of pinpoint array and is located at the screw hole of inducing roller surface.

6. continuous print fiber fabrication setup as claimed in claim 5, is characterized in that pinpoint array is provided with 4 row's needle points, and 4 row's needle points are all along inducing roller shaft to setting, and adjacent 2 to arrange needle points be 90 degree at same interval angles circumferentially.