CN105624808B - A kind of annular flake shape electrode electrostatic spinning apparatus - Google Patents
A kind of annular flake shape electrode electrostatic spinning apparatus Download PDFInfo
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- CN105624808B CN105624808B CN201610211445.3A CN201610211445A CN105624808B CN 105624808 B CN105624808 B CN 105624808B CN 201610211445 A CN201610211445 A CN 201610211445A CN 105624808 B CN105624808 B CN 105624808B
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- electrode
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- annular flake
- pedestal
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0092—Electro-spinning characterised by the electro-spinning apparatus characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
Abstract
The present invention discloses a kind of annular flake shape electrode electrostatic spinning apparatus, including spinning system, dynamical system, coating mechanism, liquid-supplying system, cleaning mechanism, collection system and high voltage power supply, collection system is located at the top of spinning system, spinning system includes spinning electrode and pedestal, the spinning electrode is fixed on the pedestal, the dynamical system drives the pedestal and the spinning electrode to make unidirectional rotary motion, the coating mechanism and the cleaning mechanism are arranged on the spinning electrode and fixed, the cleaning mechanism is located at before the coating mechanism in the spinning electrode direction of motion, the collection system includes passive electrode, wherein described spinning electrode is annular flake, the transmitting terminal of the annular flake is cutting-edge structure.Annular flake shape electrode electrostatic spinning apparatus of the present invention can improve the yield and quality of nanofiber, realize prepared by the mass of nanofiber, its mechanism is simple, easy to operate, it is easy to accomplish industrialization is used.
Description
Technical field
The present invention relates to electrostatic spinning technique field, more particularly to a kind of annular flake shape electrode electrostatic spinning apparatus.
Background technology
Electrostatic spinning technique is the technology that a kind of utilization electrostatic field force produces nanofiber, and its principle is：In high-pressure electrostatic
In, charged polymer solution forms taylor cone in the presence of electric field force, when electric field force is sufficiently large so that charged drop overcomes
Surface tension formation electrified jet, finally on collecting mechanism deposition cure into nanofibrous structures.
The shower nozzle that traditional spray nozzle type electrostatic spinning apparatus easily occurs blocks, difficult cleaning, and array shower nozzle is in spinning process
In easily occur " edge effect " phenomenon the shortcomings of have impact on fiber quality, spinning efficiency causes yield relatively low.
Compared to spray nozzle type Static Spinning, needle-free Static Spinning has yield high, and spinning equipment is simple, and production cost is more low
Feature.A kind of needleless electrostatic spinning technique that patent WO2005/024101A1 is proposed, fiber production is big, but its spinning solution is sudden and violent
In atmosphere, the fibre diameter thickness produced is uneven for dew, in addition, spinning electrode Electric Field Distribution is uneven, spinning critical voltage is high,
Energy consumption is big.Patent CN 104313705A propose a kind of nanofiber spinning mode of annular electro polar filament, and it can avoid spinning
Solution exposes in atmosphere, and realizes the continuous coating of solution, but the installation fixed form of its wire electrode is not reasonable, lacks simultaneously
Weary effective cleaning apparatus for self, and structure is excessively complicated, is not suitable for the manufacture of batch nanofiber.
The content of the invention
In order to overcome the defect of prior art, the present invention devises a kind of annular flake shape electrode electrostatic spinning apparatus, energy
Enough rational fixed installation electrodes, the annular flake shape electrode of use realizes Electrode Field and is uniformly distributed, the point having
End structure can promote to induce spinning again simultaneously；Cleaning mechanism is set, the lasting cleaning of spinning electrode is realized.The present invention can
Increase substantially the yield and quality of fiber product.
The present invention is achieved in that a kind of annular flake shape electrode electrostatic spinning apparatus, including spinning system, dynamical system
System, coating mechanism, liquid-supplying system, cleaning mechanism, collection system and high voltage power supply, the collection system are located at the spinning system
Top, the spinning system includes spinning electrode and pedestal, and the spinning electrode is fixed on the pedestal, the dynamical system
Regiment commander moves the pedestal and the spinning electrode makees unidirectional rotary motion, and the coating mechanism and the cleaning mechanism are arranged on institute
State it is on spinning electrode and fixed, the cleaning mechanism in the spinning electrode direction of motion be located at the coating mechanism
Above, the collection system includes passive electrode, and the spinning electrode is annular flake electrode, the hair of the annular flake electrode
It is cutting-edge structure to penetrate end.
Preferably, the transmitting terminal cutting-edge structure of the annular flake electrode be triangular structure, conic linear structure or
Tractrix shape structure.
Preferably, the spinning electrode thickness is 0.05-20mm or 0.5-10mm.
Preferably, the spinning electrode is the annular flake shape electrode of more than the 1 different diameters of axle, and by diameter of axle size successively
Nesting arrangement is into tower structure, and the two neighboring tower structure spacing is 50mm-500mm.
Preferably, the collection system also includes base material, and the base material is to be set above the material of gas permeability, the base material
There is suck-back wind apparatus, the passive electrode is annular flake, and the receiving terminal of the annular flake towards spinning electrode is tied for tip
Structure.
Preferably, the coating mechanism includes liquid bath, and the cutting-edge structure of the spinning electrode is immersed in the liquid bath, institute
When stating spinning electrode rotation, the solution in the liquid bath is coated on the spinning electrode.
Preferably, the coating mechanism includes setting on upper lid and liquid bath, the upper lid vertical in inlet, the liquid bath
Cloth liquid wheel is set, and cloth liquid wheel circle peripheral surface is set to V-type and uniform groove, in the vertical direction, the cloth liquid wheel
It is in contact, is in contact below with the spinning electrode with the inlet above.
Preferably, the coating mechanism sets fixed seat, the annular flake electrode respectively with the cleaning mechanism lower end
Bottom side or both sides set track, and the coating mechanism is separately fixed in two fixed seats with the cleaning mechanism, at least
One fixed seat arrangement on the track, moves at least one described fixed seat, adjusts described apply on the track
Cover the spacing of mechanism and the cleaning mechanism.
Preferably, in addition to gas accessory system, the gas accessory system include for supply source of the gas, be arranged on base
Air cavity and the circumference array stomata being arranged on pedestal below seat.
Preferably, the dynamical system includes motor, transmission device and the hollow shaft being connected with pedestal, and the motor leads to
Cross the transmission device and drive hollow shaft single direction rotation together with pedestal, and then drive the spinning electrode to make single direction rotation
Motion.
Compared with prior art, the invention has the advantages that：
(1) uniform electric field can be produced as spinning electrode using annular flake shape structure, helps to lift spinning fibre
Quality；
(2) tip design of annular flake transmitting terminal, makes accumulation at tip, helps to induce spinning；
The annular flake shape electrode of more than (3) the 1 different diameters of axle, by the tower structure of diameter of axle size successively nesting, increase
The area of emitting area, improves yield；
(4) coating mechanism that arrangement matches with electrode on annular flake shape electrode, can avoid spinning solution and air
Contact, keeps the stability of SOLUTION PROPERTIES before and after spinning；
(5) cleaning mechanism that arrangement matches with electrode on annular flake shape electrode, realizes online cleaning emission electrode,
It ensure that the uniformity of spinning quality；
(6) spinning electrode makees one-way movement, and coating mechanism and cleaning mechanism are fixed, the direction rotated in spinning electrode
On, keep cleaning mechanism all the time before coating mechanism, it can be ensured that higher cleaning efficiency, contribute to coated cloth liquid
Uniformly；
(7) receiving electrode is set to annular flake shape structure, matches with the electric level structure of spinning, realizes electric fields uniform point
Cloth, improves spinning efficiency；
(8) spinning electrode both sides set array stomata, to realize that gas plays a part of drawing stretching in fiber, and can add
Fast fiber deposition cure, improves spinning efficiency and spinning quality；And
(9) set discharge to circulate and devil liquor recovery structure, save resource.
Brief description of the drawings
Fig. 1 is annular flake shape electrode electrostatic spinning apparatus schematic diagram of the present invention.
Fig. 2 is the front view of apparatus of the present invention.
Fig. 3 is the top view of apparatus of the present invention.
The main sectional view of Fig. 4 apparatus of the present invention.
Fig. 5 a are that the transmitting terminal cutting-edge structure of annular flake electrode is the schematic diagram of triangular structure；Fig. 5 b are transmitting terminal point
End structure is the linear schematic diagram of conic；Fig. 5 c are the schematic diagram that transmitting terminal cutting-edge structure is tractrix shape.
Fig. 6 is coating mechanism structural representation, there is two kinds of ways of realization, and wherein 6a is to be realized by way of liquid bath is submerged
The mechanism graphics of covering liquid, 6b is main profile, and 6c is the tomograph of caulking gum, and 6d is the upward view of caulking gum,
6e is realizes the mechanism profile of covering liquid by way of the coating of cloth liquid wheel, and 6f is the graphics of cloth liquid wheel.
Fig. 7 is cleaning mechanism schematic diagram, and wherein 7a is mechanism graphics, and 7b is main profile.
The multistage tower-like spinning electrode schematic diagram of two kinds of forms of Fig. 8.
1- guide rollers, 2- base materials, 3- HV generators, 4- polyrrhea grooves, 5- stomatas, 6- coating mechanisms, cleaning mechanism,
7- hollow shafts, 8- induced-draught fans, 9- passive electrodes, 10- spinning electrodes, 11- pedestals, 12- dynamical systems, 13- motors, 14- air cavitys,
Covered on 15- sources of the gas, 16- waste liquid tanks, 17- liquid cases, 18- measuring pumps, 19-, 20- springs, 21- Bu Ye mechanisms fixed seat, 22- sealings
Rubber, 23- liquid spill-ways, 24- inlets, 25- seal washers, 26- liquid baths, 27- cloth liquid wheels, 28- cleaning mechanism fixed seats, 29-
Spring part, 30- cleaning devices, 31- shower nozzles, 32- scrapers, 33- grooves, 34- fluid passages, 35- times flow containers, 36- valves, 37- disk covers,
38- bases.
Embodiment
A kind of knot of annular flake shape electrode electrostatic spinning apparatus of the invention will be described by the embodiment in accompanying drawing below
Structure is constructed.Annular flake shape electrode electrostatic spinning apparatus include spinning system, gas accessory system, dynamical system, coating mechanism,
Liquid-supplying system, cleaning mechanism, collection system and high voltage power supply.
As shown in Fig. 1, Fig. 4, Fig. 5 and Fig. 8, spinning system includes spinning electrode 10 and pedestal 11, and spinning electrode 10 is fixed
On the base 11, pedestal 11 is made up of disk cover 37 and base 38.Spinning electrode 10 is the structure of annular flake shape, and annular flake is easy
Uniform electric field is produced, helps to lift spinning fibre quality.The transmitting terminal of annular flake is cutting-edge structure, can realize sophisticated place
Accumulation, helps to induce spinning.The thickness of spinning electrode 10 is 0.05-20mm, and preferably 0.5-10mm, its material is conduction material
Matter.The cutting-edge structure of spinning electrode 10 is respectively triangular structure, three kinds of structures of conic linear structure and tractrix shape structure
Form, or the cutting-edge structure of other forms, can realize the effect of sophisticated accumulation.Spinning electrode 10 also may be used
Think the annular flake shape electrode of multiple different diameters of axle, by the tower structure of diameter of axle size successively shoe cover, two neighboring tower-like knot
Structure spacing is 50mm-500mm, it is to avoid hypotelorism influences the stability of electric field, while the area of emitting area can also be increased,
And then improve the yield of fiber.
As shown in Figure 1, Figure 2 and Figure 3, gas accessory system includes source of the gas 15, the and of air cavity 14 being arranged on below pedestal 11
Two row's circumference array stomatas 5 on the base 11 are set.Gas can be inert gas or other nonflammable gases.By source of the gas
15 are supplied, and gas flows through air cavity 14, and is ejected by array stomata 5, and the stomata 5 for being distributed in spinning electrode 10 is sprayed
The volatilization that the air-flow gone out can play solvent on stretching and drawing and gathering, accelerating fibers to spinning fibre makes fiber deposition solid
Change, improve spinning efficiency and spinning quality.
As depicted in figs. 1 and 2, dynamical system includes motor 13, transmission device 12 and hollow shaft 7.Motor 13 is power source,
Hollow shaft 7 is connected with pedestal 11, and transmission device 12 can be synchronizing wheel and the form or the form of sprocket wheel chain of timing belt,
Or other alternative type of belt drive.Motor 13 can drive hollow shaft 7 and the single direction rotation of pedestal 11 by transmission device 12, enter
And drive spinning electrode 10 to make unidirectional rotary motion.
As shown in Fig. 5, Fig. 6 a, 6b, 6c, 6d, a kind of form of coating mechanism 6 is：Coating mechanism 6 includes upper lid 19, bullet
Spring 20, Bu Ye mechanisms fixed seat 21, caulking gum 22, liquid spill-way 23, inlet 24, seal washer 25 and liquid bath 26.Inlet
24 are arranged on lid 19, and solution is imported into liquid bath 26 by inlet 24, upper lid 19 and Bu Ye mechanisms fixed seat 21 it
Between realized and seal by seal washer 25, be provided with liquid spill-way 23 in Bu Ye mechanisms fixed seat 21, can be by by liquid spill-way 23
Unnecessary solution export, Bu Ye mechanisms fixed seat 21 is embedded with caulking gum 22, the structure of caulking gum 22 to be spun with annular flake
Silk electrode 10 mutually coincide, and 22 points of caulking gum is two pieces, and is fixed on by spring 20 in Bu Ye mechanisms fixed seat 21, in bullet
In the presence of the spring force of spring 20, two pieces of caulking gums 22 are close on spinning electrode 10, so that the side rotated in spinning electrode 10
Realize the sealing of solution upwards.A part for spinning electrode 10 is immersed in the liquid bath 26 of coating mechanism 6, when spinning electrode 10
During single direction rotation, the solution coating in liquid bath 26 is on spinning electrode 10.
As shown in Fig. 5 and Fig. 6 a, 6e and 6f, coating mechanism 6 can also be arranged to another structure type.Coating mechanism 6
Including upper lid 19, spring 20, Bu Ye mechanisms fixed seat 21, caulking gum 22, liquid spill-way 23, inlet 24, seal washer 25, liquid
Groove 26, cloth liquid wheel 27 and groove 33.The circumferencial direction surface of cloth liquid wheel 27 is set to the V-type concaved, and V-type cloth liquid wheel 27 is vertical
Top and bottom are in contact with inlet 24 and spinning electrode 10 respectively on direction, and spinning solution is flowed into from inlet 24, cloth liquid wheel 27
Upper circumference it is uniform groove 33, can be by the solution storage of inflow in groove 33, the drive cloth liquid when spinning electrode 10 rotate
The solution that wheel 27 is rotated in groove 33 is coated on spinning electrode 10.
The design of both the above coating mechanism, can realize the sealing of coating solution, can avoid solution exposed to sky
Rotten or contaminated in gas, can not only ensure to coat on spinning electrode is uniform and continuous, it can also be ensured that spinning quality
Stabilization.
As shown in fig. 7, cleaning mechanism 6 includes cleaning mechanism fixed seat 28, spring part 29, cleaning device 30, shower nozzle 31, scraper
32.Shower nozzle 31, scraper 32, cleaning device 30 are sequentially fixed in cleaning mechanism fixed seat 28, and shower nozzle 31 can be towards spinning electrode 10
Upper injection cleaning agent, the solute of some solidifications is softened and decomposed, the solidfied material that then will be adhered to by scraper 32 on spinning electrode 10
And waste liquid strikes off, it is close in the presence of spring part 29 on spinning electrode 10, carries out last cleaning, continue spinning electrode
It is clean.Coating mechanism and cleaning mechanism are arranged on the top of spinning electrode 10, and fixed, the side rotated in spinning electrode 10
Upwards, cleaning mechanism is always positioned at before coating mechanism, therebetween distance away, and spacing is adjustable, in cleaning
Mechanism after being cleaned after the remnants on spinning electrode 10 to that can make coating mechanism carry out continuous cloth liquid and realize continuous and fiber quality
Stable spinning.Coating mechanism and cleaning mechanism can be separately fixed in two fixed seat (not shown), then by fixed seat
In the arc orbit (not shown) for being arranged in annular flake electrode base one or both sides, fixed seat can with track slide,
Position determine after, by the retaining mechanism (not shown) in fixed seat, fixed seat is locked on guide rail, realize coating mechanism with
The spacing adjustment of cleaning mechanism；Also coating mechanism and the one of fixed seat of cleaning mechanism can be fixedly mounted, another installation
On guide rail, by the slip of the mechanism on guide rail, the relative position of coating mechanism and cleaning mechanism is can adjust, is realized between adjusting
Away from purpose.
As shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 6, liquid-supplying system include polyrrhea groove 4, waste liquid tank 16, liquid case 17, measuring pump 18,
Fluid passage 34, time flow container 35 and valve 36.Solution is flowed out by measuring pump 18 by liquid case 17, and flows to inlet 24, is coating machine
Solution needed for the quantitative continuous offer spinning of structure 6, unnecessary solution flows to back flow container 35 by liquid spill-way 23, returns flow container 35 and pass through
Valve 36 is connected with liquid case 17, is switched by control valve 36, you can the solution returned in flow container 35 is imported into liquid case 17.
Two circular polyrrhea grooves 4 are designed with the upper surface of pedestal 11, polyrrhea groove 4 is located at the both sides of spinning electrode 10, in pedestal 11
Inside, uniform four fluid passages 34, polyrrhea groove 4 is connected with fluid passage 34, and fluid passage 34 is connected with the liquid pipe in hollow shaft 7, from
The waste liquid that the both sides of spinning electrode 10 flow down flows to waste liquid tank 16 via the liquid pipe in liquid bath 4, fluid passage 34 and hollow shaft 7, from
And realize devil liquor recovery.Liquid-supplying system ensure that continual and steady feed flow, and can realize that effective discharge is reclaimed and devil liquor recovery.
As depicted in figs. 1 and 2, collection system includes passive electrode 9, guide roller 1, base material 2, suck-back wind apparatus 8.Collect electricity
Pole 9 is the cyclic structure corresponding with spinning electrode 10, and cyclic structure can realize the uniform of Electric Field Distribution on passive electrode 9,
It is preferred that, the receiving terminal of passive electrode 9 can be provided with cutting-edge structure, and cutting-edge structure is towards spinning electrode 10, cutting-edge structure
The point effect being had can realize that electrostatic charge is assembled at tip, easily realize induction spinning, improve spinning efficiency.Base material
2 be the reception material with gas permeability, and fiber is in its surface deposition cure obtained by electrospinning.Guide roller 1 drives base material 2 constantly to transport
It is dynamic, it is ensured that the continuity of production.The top of base material 2 is provided with suck-back wind apparatus 8, and suck-back wind apparatus can be induced-draught fan, exhaust
Fan etc., it is fiber solidifying on the gas that stomata 5 is ejected, acceleration base material 2 to take away, and further promote the stretching of fiber.
Height adjustable between passive electrode 9 and spinning electrode 10, to realize the controllability of fiber production.
As depicted in figs. 1 and 2, high voltage power supply includes HV generator 3.The positive pole connection of HV generator 3
To electrode 10, the negative pole of HV generator 3 is connected to passive electrode 9, is produced between spinning electrode 10 and passive electrode 9
High-voltage electrostatic field, realizes spinning.
When carrying out spinning using the present apparatus, high voltage power supply produces high voltage electric field between spinning system and collection system, moves
Force system drives the rotation of spinning system one direction, and liquid-supplying system is by solution pump to setting and be fixed on the coating machine on spinning electrode
Structure, carries out cloth liquid to spinning electrode by coating mechanism, spinning electrode is carried out spinning, in the presence of electric field, by collection system
Fiber collection is carried out, on the direction that spinning electrode rotates, cleaning mechanism is always positioned at before coating mechanism, set and fixed
Cleaning mechanism on spinning electrode can realize lasting cleaning to spinning electrode, and stretching of the gas accessory system to spinning fibre is led
Draw and draw in, further improve the quality of spinning.
Annular flake shape electrode electrostatic spinning apparatus of the present invention can improve the yield and quality of nanofiber, realize nanometer
Prepared by the mass of fiber, its mechanism is simple, easy to operate, it is easy to accomplish industrialization is used.
Finally it should be noted that：Above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation；Although the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in previous embodiment, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or substitutions, the essence of appropriate technical solution is departed from various embodiments of the present invention technical side
The scope of case.
Claims (7)
1. a kind of annular flake shape electrode electrostatic spinning apparatus, including spinning system, dynamical system, coating mechanism, liquid-supplying system,
Cleaning mechanism, collection system and high voltage power supply, the collection system are located at the top of the spinning system, the spinning system bag
Spinning electrode and pedestal are included, the spinning electrode is fixed on the pedestal, the dynamical system drives the pedestal and described
Spinning electrode makees unidirectional rotary motion, and the coating mechanism and the cleaning mechanism are arranged on the spinning electrode and fixed
Motionless, the cleaning mechanism is located at before the coating mechanism in the direction of motion of the spinning electrode, the collection system
Including passive electrode, it is characterised in that：The spinning electrode is annular flake electrode, and the transmitting terminal of the annular flake electrode is
Cutting-edge structure,
The coating mechanism includes setting vertically arranged cloth liquid wheel in inlet, the liquid bath on upper lid and liquid bath, the upper lid,
Cloth liquid wheel circle peripheral surface is set to V-type and uniform groove, in the vertical direction, above the cloth liquid wheel with it is described enter
Liquid mouthful is in contact, and is in contact below with the spinning electrode；
The coating mechanism sets fixed seat, the annular flake electrode base side or two respectively with the cleaning mechanism lower end
Side sets track, and the coating mechanism is separately fixed in two fixed seats with the cleaning mechanism, at least one described fixation
Seat arrangement on the track, moves at least one described fixed seat on the track, adjust the coating mechanism with it is described
The spacing of cleaning mechanism.
2. annular flake shape electrode electrostatic spinning apparatus according to claim 1, it is characterised in that：The annular flake electricity
The transmitting terminal cutting-edge structure of pole is triangular structure, conic linear structure or tractrix shape structure.
3. annular flake shape electrode electrostatic spinning apparatus according to claim 1, it is characterised in that：The spinning electrode is thick
Spend for 0.05-20mm.
4. annular flake shape electrode electrostatic spinning apparatus according to claim 1, it is characterised in that：The spinning electrode is
The annular flake shape electrode of more than the 1 different diameters of axle, and by diameter of axle size, nesting arrangement is into tower structure successively, two neighboring tower
Shape structure spacing is 50mm-500mm.
5. annular flake shape electrode electrostatic spinning apparatus according to claim 4, it is characterised in that：The collection system is also
Including base material, the base material is that suck-back wind apparatus is provided with above the material of gas permeability, the base material, and the passive electrode is ring
Shape thin slice, the receiving terminal of the annular flake towards spinning electrode is cutting-edge structure.
6. the annular flake shape electrode electrostatic spinning apparatus according to claim 1 or 5, it is characterised in that：Also include gas
Body accessory system, the gas accessory system includes for the source of the gas supplied, the air cavity being arranged on below pedestal and is arranged on base
Circumference array stomata on seat.
7. the annular flake shape electrode electrostatic spinning apparatus according to claim 1 or 5, it is characterised in that：The power
System includes motor, transmission device and the hollow shaft being connected with pedestal, and the motor is driven described by the transmission device
Hollow shaft single direction rotation together with pedestal, and then drive the spinning electrode to make unidirectional rotary motion.
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| CN105624808A (en) | 2016-06-01 |
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Denomination of invention: Annular flake-shaped electrode electrostatic spinning device Effective date of registration: 20200408 Granted publication date: 20170912 Pledgee: Guangdong Nanhai Rural Commercial Bank branch branch of Limited by Share Ltd. Pledgor: FOSHAN QINGZI PRECISION MEASUREMENT AND CONTROL TECHNOLOGY Co.,Ltd. Registration number: Y2020980001334 |
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Date of cancellation: 20230412 Granted publication date: 20170912 Pledgee: Guangdong Nanhai Rural Commercial Bank branch branch of Limited by Share Ltd. Pledgor: FOSHAN QINGZI PRECISION MEASUREMENT AND CONTROL TECHNOLOGY Co.,Ltd. Registration number: Y2020980001334 |