CN103911678B - A kind of coaxial nozzle for electrofluid spray printing - Google Patents
A kind of coaxial nozzle for electrofluid spray printing Download PDFInfo
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- CN103911678B CN103911678B CN201410155392.9A CN201410155392A CN103911678B CN 103911678 B CN103911678 B CN 103911678B CN 201410155392 A CN201410155392 A CN 201410155392A CN 103911678 B CN103911678 B CN 103911678B
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- spray canister
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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
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
Abstract
The invention discloses a kind of coaxial nozzle for electrofluid spray printing, comprise outer nozzle and inner nozzle, axis hole is provided with bottom outer nozzle, shaft hole sleeve is connected to Connection Block, Connection Block is provided with axial step hole, socket inner nozzle base in stepped hole, the inner core of outer nozzle near the side of spout is also socketed with medium-height trestle, one end of interior nozzle needle is fixed on inner nozzle base, the other end is through fixing the positioning through hole of medium-height trestle, the outer wall of Connection Block is also socketed with piezoelectric ceramic actuator, and piezoelectric ceramic actuator is fixedly connected with outer spray canister.The coaxial nozzle of electrofluid spray printing provided by the invention, the relative altitude of interior outer nozzle is by Piezoelectric Ceramic device fine adjustment, realize the precise hard_drawn tuhes of the relative discharge of ectonexine different solutions, and more accurately controlling each layer " shell " structural thickness of coaxial spinning, and by medium-height trestle arrange improve in the coaxial accuracy of alignment of outer nozzle.
Description
Technical field
The present invention relates to a kind of coaxial nozzle device, particularly a kind of for the coaxial nozzle of electrofluid spray printing legal system for multi-layer nano fiber and MULTILAYER COMPOSITE drop.
Background technology
Electrofluid spray printing method prepares the important method of multi-layer nano fiber and MULTILAYER COMPOSITE drop.Electrofluid spray printing method adopts the coaxial nozzle device of bushing type syringe needle, the polymer solution that two or more are different sprays through coaxial nozzle, obtain even, long size and there is the multilayer Coaxial Nanofibers of " shell-core " structure, or be there is the MULTILAYER COMPOSITE drop of " shell-core " structure.MULTILAYER COMPOSITE drop and or the fiber of " hollow powder " structure have huge potentiality by fields such as microfluid, photoelectron and stored energies, numerous device awaits exploitation.
The Coaxial Nanofibers that electric current spray printing method obtains comprises nano silk, nano wire, nanometer rods, nanotube, nanobelt and nano-cable, because its specific area is large, surface energy and activity large, there are small-size effect, surface or interfacial effect, quantum size effect, macro quanta tunnel effect etc., and then show specificity in chemistry, physics (heat, optical, electrical magnetic etc.) properties, be widely used in the technical fields such as filtration, sensing, catalysis, organizational project, protective clothing, advanced optoelectronic component, MEMS inductance element and drug delivery.Specifically, in lithium ion battery, the electrode with coaxial fibre structure not only can improve energy conversion rate, can also improve the stability recycled; Coaxial fiber can also prepare electrode and the light-emitting component (LED) of solar cell.In addition, in electrochemical field, coaxial fiber can manufacture fibrous crystal pipe through certain post processing, while its electric property of guarantee, greatly reduce production cost and difficulty.The structure of specific area makes the coaxial fiber with certain performance to form ultracapacitor in addition, have great energy density and power density, and the material with high catalytic activity can be used for photocatalysis field.The film be simultaneously assembled into by the fiber of One's name is legion also realizes the effect of filtering by high voidage, even complete the regulation of environment.
The MULTILAYER COMPOSITE drop with " shell-core " structure that electrofluid spray printing method obtains is mainly used in micropackaging field; be applied in medicament slow release encapsulation especially; namely support at microballoon skin the medicine that protective material is wrapped in certain effect; medicine is diffused in body by the space of nano-scale of infiltration or clad with given pace; greatly reduce phenomenon and the energy artificial Co ntrolled release time of medicine initial release excessive velocities, more effectively can play the effect of medicine.Structure and the electronic device of various complexity can be prepared by various special nozzle one step of design.Electrofluid spray printing method can by functional device package in " hollow powder " structure, save space greatly, also or directly make the electronic device of " shell-core " structure, and pass through the dissolution time of the THICKNESS CONTROL structure of " shell ", the manufacture for transient state electronics provides efficient manufacture method.
But also there is obvious defect in the coaxial nozzle that the electrofluid spray printing method of prior art adopts:
One be most nozzle is non-exchange structure, the spout size of nozzle is fixed, the flow velocity of solution and flow cannot be regulated by spout, by means of only means such as the attribute of regulator solution own or the adjustments of delicate flow pump, make the adjustable amplitude of liquid inventory little, the needs of the various multilayer composite fiber complicated and changeable of preparation and compound drop cannot be met, and device poor universality.
Even if two is that in prior art, portion nozzle adopts removable shower nozzle, but removable shower nozzle is the periphery being socketed in nozzle, because jet size is very little, be generally micron order, make the diameter being socketed in interior nozzle less, make that the difficulty of processing of nozzle is large, machining accuracy is low, have a strong impact on the multilayer composite fiber of preparation and the structure precision of drop.
Three is that the spout relative altitude of the ectonexine nozzle of coaxial nozzle is fixed and cannot regulate, thus the precise hard_drawn tuhes more of the relative discharge of each layer different solutions is not realized by the relative altitude of the spout regulating interior outer nozzle, to make up the defect of the control accuracy deficiency of delicate flow pump, thus further by the accurate control to each layer " shell " structural thickness of multilayer composite fiber and drop of the control realization of fine adjustment more of relative discharge, thus can not cannot meet and prepare the multi-layer nano fiber of all kinds of labyrinth and the needs of compound drop.
Patent of invention " a kind of coaxial jet head for electro-hydrodynamic jet printing and application thereof ", Authorization Notice No.: CN102275386B, authorized announcement date: 2013.05.22, disclose a kind of coaxial jet head for electro-hydrodynamic jet printing, comprise probe placement platform, nozzle, supporting seat, metal probe and lip cover, described nozzle is fixedly installed on probe placement platform, described supporting seat is arranged on upper end of nozzle, described lip cover is sleeved on the spout of nozzle lower end, described metal probe upper needle end is sleeved in supporting seat screwed hole of centre, needle body is placed in nozzle chamber, needle body axis is coaxial with nozzle centre axis, and the needle point of metal probe bottom passes the through hole in described lip cover and stretches out in outside nozzle.This Coaxial nozzle has the control accuracy that can improve black liquid quantity delivered, and can form the advantages such as seriation shower nozzle by changing lip cover.
But what disclosed in foregoing invention patent, Coaxial nozzle inside adopted is metal probe but not nozzle needle, metal probe is only for changing Electric Field Distribution, improving stability of spinning process, thus this Coaxial nozzle can not realize coaxial spinning owing to not having inside and outside nozzle arrangements, cannot prepare the fiber of " shell-core " structure or " hollow powder " structure or compound drop and multi-ply fibrous structure.On the other hand, although lip cover also be replaceable structure, its object only for ease of replacing metal probe, and can not realize regulator solution flow, realize to " shell " of multilayer composite fiber structure or compound drop thick control and regulation function.
Summary of the invention
The relative altitude of the interior outer nozzle that the coaxial nozzle that object of the present invention is intended to the electrofluid spray printing overcoming prior art exists cannot regulate, non-exchange nozzle arrangements cannot realize the adjustment of liquid inventory, removable nozzle arrangements difficulty of processing is large, the shortcomings and deficiencies such as precision is low, a kind of novel coaxial nozzle for electrofluid spray printing is provided, the relative altitude of interior outer nozzle is by Piezoelectric Ceramic device fine adjustment, realize the precise hard_drawn tuhes of the relative discharge of ectonexine different solutions, and pass through the setting of centering supporting structure, the coaxial accuracy of alignment of outer nozzle in improving, and strengthen the fixation of internal nozzle needle.
The present invention for the technical scheme adopted realizing above-mentioned technical purpose is:
A kind of coaxial nozzle for electrofluid spray printing, comprise outer nozzle and inner nozzle, described outer nozzle comprises outer spray canister and is socketed on the outer shower nozzle of spout end of outer spray canister, described outer spray canister is provided with away from one end of spout the axis hole that diameter is greater than the inner diameter of steel flue of outer spray canister, the Connection Block of hollow tube-shape is socketed with in described axis hole, described Connection Block and outer spray canister interference fits, the middle part of described Connection Block is provided with axial stepped hole, the diameter that described stepped hole is positioned at lateral ends is greater than inner side, described inner nozzle comprises inner nozzle base and interior nozzle needle, described inner nozzle base sheath be connected to the stepped hole of Connection Block larger diameter end and with the stepped hole interference fits of Connection Block, the inner core of described outer spray canister is also socketed with medium-height trestle near the side of spout, described is circulus to medium-height trestle, its center is provided with positioning through hole, one end of described interior nozzle needle is fixed on inner nozzle base, the other end inserts in outer spray canister also through fixing the positioning through hole of medium-height trestle, the outer wall of described Connection Block is also socketed with piezoelectric ceramic actuator, described piezoelectric ceramic actuator is fixedly connected with outer spray canister.
A kind of coaxial nozzle for electrofluid spray printing, one end of described outer shower nozzle is provided with external screw thread, the spout end of described outer spray canister is provided with internal thread, the external screw thread of described outer shower nozzle screws mutually with the internal thread of outer spray canister, when described outer shower nozzle screws in outer spray canister, describedly contact with outer shower nozzle face medium-height trestle, be provided with conical through-hole in the middle part of described outer shower nozzle, the diameter of conical through-hole near outer spray canister side of described outer shower nozzle is greater than opposite side.
For a coaxial nozzle for electrofluid spray printing, described outer spray canister is also fixed with the fixing shoulder of ring-type away from the outer wall of the side of spout, and the fixing shoulder of described outer spray canister is fixedly connected with nozzle fixed platform.
For a coaxial nozzle for electrofluid spray printing, described interior nozzle needle comprises the replaceable nozzle needle that a group has different-diameter.
For a coaxial nozzle for electrofluid spray printing, described outer shower nozzle comprises the replaceable shower nozzle that one group of taper hole has different cone footpath and tapering.
For a coaxial nozzle for electrofluid spray printing, described inner nozzle base is metal or non-conducting material.
For a coaxial nozzle for electrofluid spray printing, described outer spray canister and Connection Block are non-conducting material, and described outer shower nozzle is metal or non-conducting material.
For a coaxial nozzle for electrofluid spray printing, the lateral wall of described outer shower nozzle is also provided with the spacing shoulder of ring-type.
For a coaxial nozzle for electrofluid spray printing, described outer spray canister is the combination of cylinder and cone, and near spout end is cone.
For a coaxial nozzle for electrofluid spray printing, the lateral wall of described outer spray canister is provided with outer nozzle inlet.
Compared with the electrofluid spray printing coaxial nozzle of prior art, the present invention has following remarkable advantage:
1, be can micrometric displacement structure between interior outer nozzle, and adopt piezoelectric ceramic actuator to change the relative altitude of inwardly projecting orifice, realize the precise hard_drawn tuhes of the relative discharge of ectonexine different solutions, make up the defect that delicate flow pump control accuracy is inadequate, realize more accurately controlling coaxial spinning process ectomesoderm " shell " structural thickness, meet the composite nano fiber of all kinds of labyrinth and the structure needs of compound drop.
2, nipple top arranges removable outer shower nozzle outside, and the spray canister that outer nozzle set is connected to outer nozzle is inner, make the spray canister size of outer nozzle can process larger, thus reduce difficulty of processing, the raising precision of outer nozzle, also be convenient to inner nozzle in the installation of outer nozzle inner core and location simultaneously, and be conducive to the coaxial precision improving interior outer nozzle.
3, the centering supporting structure being arranged at outer nozzle inner core is increased, interior nozzle needle two ends are fixed, improve the coaxial accuracy of alignment of inner nozzle phase external nozzle, and make the size also corresponding increasing to medium-height trestle owing to changing shower nozzle and the socket relation of outer nozzle, thus the difficulty of processing reduced medium-height trestle, further increase the coaxial accuracy of alignment of interior outer nozzle.
4, coaxial nozzle has the interchangeable outer shower nozzle of array of sizes and interior nozzle needle, by the outer shower nozzle of different inner diameters and the combination of interior nozzle needle, obtain that there is the outer nozzle of different fluid channel size and the coaxial nozzle of inner nozzle, realize the quantity delivered to solution, micro nanometer fiber diameter, coaxially fiber " shell " structural thickness regulate and control, and be applicable to the solution of different wetting and rheological characteristic.
5, be can micrometric displacement structure between interior outer nozzle, and inner nozzle is extended in outer nozzle, its adsorption effect can promote the formation of outer nozzle place taylor cone, effectively reduces the critical voltage value of the applied voltage needed for technique.
6, the outer shower nozzle of outer nozzle and the material of inner nozzle can be metal or non-conducting material, by the different collocation three kinds of powered-up mode that can realize that inner nozzle is powered separately, outer nozzle is powered separately and interior outer nozzle is powered simultaneously, can spinning parameter be changed by the different modes that powers up, and then act on playing control spinning process.
Accompanying drawing explanation
Fig. 1 is the structural representation of the coaxial nozzle for electrofluid spray printing of the present invention.
Fig. 2 be the coaxial nozzle for electrofluid spray printing of the present invention adjustment in the schematic diagram of outer nozzle relative altitude.
Fig. 3 is the schematic diagram that a group of the coaxial nozzle for electrofluid spray printing of the present invention has the outer nozzle of different taper hole size.
Fig. 4 is the operating diagram of the coaxial nozzle for electrofluid spray printing of the present invention.
Fig. 5 is the schematic diagram adopting the Coaxial Nanofibers prepared for the coaxial nozzle of electrofluid spray printing of the present invention.
Fig. 6 is the schematic diagram adopting the compound drop prepared for the coaxial nozzle of electrofluid spray printing of the present invention.
In figure: outer nozzle 1, outer spray canister 11, outer shower nozzle 12, outer nozzle fixes shoulder 13, inner nozzle 2, inner nozzle base 21, interior nozzle needle 22, Connection Block 3, to medium-height trestle 4, piezoelectric ceramic actuator 5, outer nozzle inlet 6, nozzle fixed platform 7.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
See Fig. 1, the coaxial nozzle for electrofluid spray printing provided by the invention, comprises outer nozzle 1 and inner nozzle 2.Wherein, outer nozzle 1 comprises outer spray canister 11 and is socketed on the outer shower nozzle 12 of spout end of outer spray canister 11, and outer shower nozzle 12 is connected with outer spray canister 11.Outer spray canister 11 is provided with away from one end of spout the axis hole that diameter is greater than outer spray canister 11 inner diameter of steel flue, is socketed with the Connection Block 3 of hollow tube-shape in axis hole, and Connection Block 3 and outer spray canister 11 interference fits.The middle part of Connection Block 3 is provided with axial stepped hole, and the diameter that stepped hole is positioned at lateral ends is greater than inner side.Inner nozzle 2 comprises inner nozzle base 21 and interior nozzle needle 22, inner nozzle base 21 be socketed on the stepped hole of Connection Block 3 larger diameter end and with the stepped hole interference fits of Connection Block 3.The inner core of outer spray canister 11 is also socketed with medium-height trestle 4 near the side of spout, and be circulus to medium-height trestle 4, its center is provided with positioning through hole.One end of interior nozzle needle 22 is fixed on inner nozzle base 21, and the other end inserts in outer spray canister 11 and also fixes through the positioning through hole to medium-height trestle 4.The outer wall of Connection Block 3 is also socketed with piezoelectric ceramic actuator 5, and piezoelectric ceramic actuator 5 is fixedly connected with outer spray canister 11.Piezoelectric ceramic actuator is existing product (cylinder encapsulation), depends on the version of piezoelectric ceramic actuator own with the form that is fixedly connected with of outer spray canister 11.
Coaxial nozzle for electrofluid spray printing provided by the invention, during use, moved up and down by computer controlled piezoelectric ceramic actuator 5 processed, drive the Connection Block 3 be connected also further to drive inner nozzle 2 to move up and down, thus the relative altitude of outer nozzle in fine adjustment.Interior nozzle needle 22 is about 20mm, and internal diameter is micron order, the upper and lower adjustable scope of interior nozzle needle be 0 ?100 microns.See Fig. 3, the schematic diagram of outer nozzle relative altitude in the adjustment of the coaxial nozzle of electrofluid spray printing of the present invention, a the inner nozzle in () figure is concordant with the spout of outer nozzle, b the spout of the inner nozzle in () figure shrinks in outer nozzle inner core, the spout of the inner nozzle in (c) figure stretches out outer nozzle certain distance.
Provided by the invention for electrofluid spray printing coaxial nozzle, one end of outer shower nozzle 12 is provided with external screw thread, the spout end of outer spray canister 11 is provided with internal thread, the external screw thread of outer shower nozzle 12 screws mutually with the internal thread of outer spray canister 11, and when outer shower nozzle 12 screws in outer spray canister 11, contact with 12, outer shower nozzle medium-height trestle 4, be provided with conical through-hole in the middle part of outer shower nozzle 12, the diameter of conical through-hole near outer spray canister side is greater than opposite side.Outer shower nozzle 12 is threaded with outer spray canister 11, is convenient to install and change outer shower nozzle 12.Outer shower nozzle 12 is socketed in the cylinder of outer spray canister 11, the size of outer spray canister 11 is increased, both the difficulty of processing of outer spray canister 11 had been reduced, be convenient to again the installation of inner nozzle 2 spray canister 11 inside outside with fixing, add the size to medium-height trestle 4 simultaneously, reduce the difficulty of processing to medium-height trestle 4, be also convenient to interior nozzle needle 22 to fixing on medium-height trestle 4, improve the accuracy of alignment of interior outer nozzle.When outer shower nozzle 12 screws in outer spray canister 11, outer shower nozzle 12 also plays the effect supported medium-height trestle 4.
Coaxial nozzle for electrofluid spray printing provided by the invention, interior nozzle needle 22 comprises the replaceable nozzle needle that a group has different-diameter, and outer shower nozzle 12 comprises the replaceable shower nozzle that one group of taper hole has different cone footpath and tapering.Fig. 3 is the schematic diagram with the outer nozzle of different taper hole size of electrofluid spray printing coaxial nozzle of the present invention, wherein, the tapering of the taper hole of outer shower nozzle is 10 ~ 30 degree, the internal diameter size of the miner diameter end of taper hole is tens microns and arrives hundreds of micron, and can seriation be become, as 20 microns, 50 microns, 100 microns, 200 microns etc., meet the needs of the internal diameter accurate adjustment to shower nozzle.Interior nozzle needle is about 20mm, and internal diameter is micron order, and internal diameter can from tens microns to hundreds of micron.By the outer shower nozzle of different inner diameters and the combination of interior nozzle needle, obtain that there is the outer nozzle of different fluid channel size and the coaxial nozzle of inner nozzle, realize the quantity delivered to solution, micro nanometer fiber diameter, coaxially fiber " shell " structural thickness regulate and control, and be applicable to the solution of different wetting and rheological characteristic.
Coaxial nozzle for electrofluid spray printing provided by the invention, outer shower nozzle 12 can also arrange the spacing shoulder of ring-type on outer wall, and when outer shower nozzle 12 screws in outer spray canister 11, spacing shoulder plays position-limiting action.For ease of the outer spray canister 11 of spacing shoulder laminating, preferably the diameter of spacing shoulder is set to identical with outer spray canister 11 nozzle diameter.Outer shower nozzle 12 is divided into two parts by spacing shoulder, and the diameter of the part that outer shower nozzle 12 is positioned at outside outer spray canister 11 can be less than the part being positioned at outer spray canister 11.
Coaxial nozzle for electrofluid spray printing provided by the invention, for ease of coaxial nozzle and nozzle fixed platform 7 are fixed, preferably spray canister 11 is fixedly installed the fixing shoulder of ring-type away from the outer wall of the side of spout outside, the fixing shoulder of outer spray canister 12 is fixedly connected with nozzle fixed platform 7, and connected mode preferred bolt connects.The shape of outer spray canister 11 is preferably set to the combination of cylinder and cone, and near spout end is cone.The lateral wall of outer spray canister 11 is also provided with the outer nozzle inlet 6 of supply solution.
Provided by the invention for electrofluid spray printing coaxial nozzle, outer spray canister and Connection Block are non-conducting material, and outer shower nozzle 12 is metal or non-conducting material, and inner nozzle base 21 is metal or non-conducting material.By the selection of outer shower nozzle, the inner nozzle submount material collocation three kinds of powered-up mode that can realize that inner nozzle is powered separately, outer nozzle is powered separately and interior outer nozzle is powered simultaneously, can spinning parameter be changed by the different modes that powers up, and then act on playing control spinning process.
Provided by the invention for electrofluid spray printing coaxial nozzle, first the fixing shoulder of outer nozzle 1 is fixedly connected with bolt with nozzle fixed platform 7 during use, then nozzle fixed platform 7 is fixing on the table with fixture, bearing substrate is put in below, and by certain connected mode be fixed to X ?on Y workbench, then by substrate ground.Then screw in outer shower nozzle 12, and make to contact with outer shower nozzle 12 surface to medium-height trestle 4.Then Connection Block 3 is socketed in the opening part of outer spray canister 11, again inner nozzle base 21 is sleeved on the stepped hole internal fixtion of Connection Block 3, interior nozzle needle 22 is inserted in outer spray canister 11, and is also fixed through to the centre bore of medium-height trestle 4, the central axis coaxial of outer nozzle in ensureing.Also need external shower nozzle and inwardly projecting orifice to carry out surface treatment before preparation, strengthen solution to its wettability, make solution not easily naturally drip and block shower nozzle.By solution parameter such as the concentration of the inside and outside solution of adjustment, viscosity, surface tension and conductances during preparation, relative distance, inside and outside solution feed flow speed, extra electric field, die opening and X that the needle point of inwardly projecting orifice and external nozzles reveals ?the technological parameter such as speed of Y workbench movement, the ambient parameter such as environment temperature and humidity can control, especially to the adjustment of " shell " structural thickness the physical dimension of obtained coaxial micro-nano fiber or compound drop.
Claims (10)
1. the coaxial nozzle for electrofluid spray printing, comprise outer nozzle (1) and inner nozzle (2), it is characterized in that: described outer nozzle (1) comprises outer spray canister (11) and is socketed on the outer shower nozzle (12) of spout end of outer spray canister (11), described outer spray canister (11) is provided with away from one end of spout the axis hole that diameter is greater than the inner diameter of steel flue of outer spray canister (11), the Connection Block (3) of hollow tube-shape is socketed with in described axis hole, described Connection Block (3) and outer spray canister (11) interference fits, the middle part of described Connection Block (3) is provided with axial stepped hole, the diameter that described stepped hole is positioned at lateral ends is greater than inner side, described inner nozzle (2) comprises inner nozzle base (21) and interior nozzle needle (22), described inner nozzle base (21) be socketed on the stepped hole of Connection Block (3) larger diameter end and with the stepped hole interference fits of Connection Block (3), the inner core of described outer spray canister (11) is also socketed with near the side of spout medium-height trestle (4), described is circulus to medium-height trestle (4), its center is provided with positioning through hole, one end of described interior nozzle needle (22) is fixed on inner nozzle base (21), the other end inserts in outer spray canister (11) also through fixing the positioning through hole of medium-height trestle (4), the outer wall of described Connection Block (3) is also socketed with piezoelectric ceramic actuator (5), described piezoelectric ceramic actuator (5) is fixedly connected with outer spray canister (11).
2. a kind of coaxial nozzle for electrofluid spray printing according to claim 1, it is characterized in that: one end of described outer shower nozzle (12) is provided with external screw thread, the spout end of described outer spray canister (11) is provided with internal thread, the external screw thread of described outer shower nozzle (12) screws mutually with the internal thread of outer spray canister (11), when described outer shower nozzle (12) the outer spray canister of screw-in (11) is interior, described medium-height trestle (4) to be contacted with outer shower nozzle (12) face, described outer shower nozzle (12) middle part is provided with conical through-hole, the diameter of conical through-hole near outer spray canister (11) side of described outer shower nozzle (12) is greater than opposite side.
3. a kind of coaxial nozzle for electrofluid spray printing according to claim 1 and 2, it is characterized in that: described outer spray canister (11) is also fixed with the fixing shoulder of ring-type away from the outer wall of the side of spout, and the fixing shoulder of described outer spray canister (12) is fixedly connected with nozzle fixed platform (7).
4. a kind of coaxial nozzle for electrofluid spray printing according to claim 1, is characterized in that: described interior nozzle needle (22) comprises the replaceable nozzle needle that a group has different-diameter.
5. a kind of coaxial nozzle for electrofluid spray printing according to claim 2, is characterized in that: described outer shower nozzle (12) comprises the replaceable shower nozzle that one group of taper hole has different cone footpath and tapering.
6. a kind of coaxial nozzle for electrofluid spray printing according to claim 1, is characterized in that: described inner nozzle base (21) is metal or non-conducting material.
7. a kind of coaxial nozzle for electrofluid spray printing according to claim 2, it is characterized in that: described outer spray canister (11) and Connection Block (3) are non-conducting material, described outer shower nozzle (12) is metal or non-conducting material.
8. a kind of coaxial nozzle for electrofluid spray printing according to claim 2, is characterized in that: the lateral wall of described outer shower nozzle (12) is also provided with the spacing shoulder of ring-type.
9. a kind of coaxial nozzle for electrofluid spray printing according to claim 1, is characterized in that: the combination that described outer spray canister (11) is cylinder and cone, and near spout end is cone.
10. a kind of coaxial nozzle for electrofluid spray printing according to claim 1 and 2, is characterized in that: the lateral wall of described outer spray canister (11) is provided with outer nozzle inlet (6).
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| CN113459671B (en) * | 2021-06-28 | 2022-04-22 | 华南理工大学 | Flexible variable-size micro-piezoelectric spray head based on electromagnetic coupling effect and adjusting method |
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| US4059949A (en) * | 1974-02-15 | 1977-11-29 | E. I. Du Pont De Nemours And Company | Sheath-core cospun heather yarns |
| JP3620103B2 (en) * | 1995-06-12 | 2005-02-16 | 日東紡績株式会社 | Method for producing resin-coated reinforcing fiber yarn |
| US6776858B2 (en) * | 2000-08-04 | 2004-08-17 | E.I. Du Pont De Nemours And Company | Process and apparatus for making multicomponent meltblown web fibers and webs |
| DE10211052A1 (en) * | 2002-03-13 | 2003-10-23 | Fresenius Medical Care De Gmbh | Hollow fiber spinning nozzle |
| WO2005095684A1 (en) * | 2004-03-25 | 2005-10-13 | Massachusetts Institute Of Technology | Production of submicron diameter fibers by two-fluid electrospinning process |
| CN101560699A (en) * | 2009-05-25 | 2009-10-21 | 天津工业大学 | Melt spinning head for multi-composition hollow fiber composite membrane |
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