CN104690966A - Supersonic nozzle for miniature ink jet printing - Google Patents
Supersonic nozzle for miniature ink jet printing Download PDFInfo
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- CN104690966A CN104690966A CN201510049609.2A CN201510049609A CN104690966A CN 104690966 A CN104690966 A CN 104690966A CN 201510049609 A CN201510049609 A CN 201510049609A CN 104690966 A CN104690966 A CN 104690966A
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Abstract
The invention discloses a supersonic nozzle for miniature ink jet printing, wherein a De Laval nozzle is connected with a gas chamber body by virtue of a locking block so as to be formed into an axisymmetric whole and fixed by virtue of a fastening bolt, and the front end of the gas chamber body is symmetrically provided with a pressure probe interface and a temperature probe interface; symmetric air source inlets are tipsily inserted in the rear end of the gas chamber body, the tail part of the gas chamber body is provided with a coaxial powder feeding pipe by virtue of a U-shaped plug, the connecting part of the De Laval nozzle and the gas chamber body is provided with an annular grid mesh, and high-pressure gas and a power body are converged in the De Laval nozzle and sprayed out. The supersonic nozzle adopts coaxial powder feeding, and the powder feeding pipe is directly communicated with the laryngeal of the De Laval nozzle, so that blockage is prevented; the airflow is uniform and stable due to the effects of the multiple symmetrically-distributed air source inlets and the annular grid mesh, so that acceleration of the powder body is facilitated; a flow pass in the De Laval nozzle is in a regular streamline shape, flow is small, the supersonic speed segment distance is long, the converging of a jet flow outlet is relatively good, and the supersonic nozzle has relatively good application prospect.
Description
Technical field
The present invention relates to a kind of nozzle, specifically relate to a kind of micro-injection based on cold spraying principle and print superonic flow nozzzle.
Background technology
In recent years since, miniature manufacture (Micro mono-manufacture) this new concept is introduced in design of material and research, becoming the focus of academia and industrial quarters concern. and along with required article shape is to complicated, miniature development, new challenge is proposed to manufacturing technology, only have and utilize new mould-free forming, particularly jet printing technology is just expected to succeed.
Jet printing technology is that a kind of material that increases manufactures solution, aerodynamic principle is utilized to focus on the deposition of accurate Nano/micron level material, normally by material to be formed after corresponding pre-treatment, it is directly printed on carrier shaping by printer, the shape and size of formed body are controlled by computer. and it is shaping that it can be used for block materials, being more suitable for thin-film material shaping. its course of work is, first, three-dimensional physical model is carried out slicing treatment, and these images are converted into executable two-dimensional pixel file, printing device is exported to as instruction. then, printing device is according to the instruction of computer, successively print these two dimensional images, to accumulate layer by layer to obtain threedimensional model object. jet printing is a kind of contactless print procedure, the precision of formed body is controlled by nozzle diameter, be generally 25-75um.Conventional jet printing material is " ink " that utilize particular formulation.Such as: technical grade
3D printsmachine manufacturer, a United States Patent (USP) was successfully applied for before Optomec day---miniature aerosol injection and aerosol injection array, patent number: #8640975, and this technology is utilized produce meticulous functional circuit and embedded components and without the need to using mould to get final product embedded components, so just reduce total chi of electronic system.
israelthe PolyJet polymeric spray patented technology that Objet company releases at the beginning of 2000, its forming principle and 3DP somewhat similar, but spray be not adhesive but polymerization forming material, PolyJet technology is also one of current 3D printing technique the most advanced.
Along with being showing improvement or progress day by day of technology, the material of jet printing also becomes more diversified, and such as, based on the micro-injection printing-forming of cold spraying principle, it has, and spray efficiency is high, speed fast, form strength of coating advantages of higher.The general principle that cold spraying is shaped is that gases at high pressure produce supersonic speed (300-1200 m/s) flowing by de Laval noz(zle) Laval jet pipe, ultrafine solids powder particle is sent into air-flow from axis direction, powder particle (1-50 μm) is accelerated by high velocity air, matrix surface is clashed into complete solid state, by larger plastic deformation, powder particle be deposited on matrix and form coating, forming whole 3D solid after accumulation layer by layer.
Although, this manufacturing process is adopted to obtain individual layer two dimensional surface film unit, relative to adopting the layer unit that formed of other traditional methods, there is better adhesive force and the characteristic such as electric conductivity, thermal conductivity is also better, but, in the process using cold spray-coating method to form, because of the structure of De Laval noz(zle) uniqueness, the spraying powder made easily is attached to its throat not easy to clean, formed and block, have a strong impact on the use of spraying equipment.For solving the problem, researcher has carried out large quantifier elimination, and develops various cold spraying nozzle.The such as patent No. 200510083138.3 discloses a kind of cold spraying nozzle, it has the convergence introducing portion of sectional area convergence, the throat be connected with convergent part and export department, playpipe etc., for preventing blocking, its playpipe is positioned at throat or exceedes the export department of this throat.The patent No. 200510030207.4 and 00253384.7 all discloses a kind of cold spraying nozzle, and said nozzle to some extent solves a difficult problem for powder stopped nozzles in spraying process.But also there is the problems such as flow is comparatively large, supersonic speed segment distance is shorter, jet expansion jet convergence property is bad in said nozzle, especially at microelectronic, while needing just more to require that powder jet has larger speed when adopting cold spray-coating method to form film unit, convergence property also will be got well.Obviously, existing nozzle is difficult to meet jet printing technical requirement, is necessary to develop a kind of novel nozzle.
Summary of the invention
The object of the invention is to for the existing superonic flow nozzzle for micro-injection printing in the process of preparation high quality thin film layer unit, flow is comparatively large, supersonic speed segment distance is shorter, jet expansion jet convergence property is bad, the problem such as easily result in blockage, and provides a kind of superonic flow nozzzle printed for micro-injection.
The present invention is realized by following technical proposals, it mainly comprises: De Laval noz(zle), latch segment, air chamber body, pressure probe interface, air source inlet, temp probe interface, U-shaped plug, powder feeding pipe, fastening bolt, annular aperture plate, De Laval noz(zle) and air chamber body connect into axial symmetry entirety by latch segment, and utilize fastening bolt to fix, on the front end of air chamber body, under be symmetrically distributed with pressure probe interface, temp probe interface, air chamber body end symmetrical oblique cutting has multiple air source inlet, afterbody is provided with coaxial powder-feeding pipe by U-shaped plug, the contact point of De Laval noz(zle) and air chamber body is provided with annular aperture plate, gases at high pressure and powder converge and spray in De Laval noz(zle).
The overall inner flow passage of described De Laval noz(zle) is regular streamlined, and its head is provided with half elliptic converging portion, is provided with throat after converging portion, and throat is connected with divergent section, and divergent section is connected with flat segments, is provided with micro-converging portion after flat segments.
The length of flat segments is greater than micro-converging portion and is greater than divergent section and is greater than converging portion; Wherein, the length of flat segments is 30-80mm, and the length of micro-converging portion is 10-30mm, and the length of divergent section is 10-26mm, and the length of converging portion is 10-24mm.
More preferably the length of flat segments is 50mm, and the length of micro-converging portion is 15.5mm, and the length of divergent section is 12.4mm, and the length of converging portion is 11.7mm.
The diameter of flat segments is greater than converging portion and is greater than micro-converging portion and is greater than throat; Wherein, the diameter of flat segments is 5-20mm, and the diameter of converging portion is 8-15mm, and the diameter of micro-converging portion is 2.6-10mm, and the diameter of throat is 1.5-3.5mm.
More preferably the diameter of flat segments is 10mm, and the diameter of converging portion is 8mm, and the diameter of micro-converging portion is 6mm, and the diameter of throat is 3mm.
Converging portion is 60 ° to the convergent angle of throat, and the convergent angle of micro-converging portion end is 3 °-10 °.
The expansion ratio of described De Laval noz(zle) is 3-13.2, described expansion ratio is the sectional area of the sectional area ratio throat of micro-converging portion is 3 ~ 13.2, under the condition of this expansion ratio, working gas and powder are 356-1400m/s from the maximal rate scope of converging portion, throat, divergent section, flat segments, the ejection of micro-converging portion; Wherein, working gas and powder are greater than flat segments from the speed of micro-converging portion and are greater than divergent section and are greater than throat and are greater than converging portion.
Described air source inlet symmetrical expression oblique cutting air inlet chamber body rear end, quantity is 2 ~ 4.
Described annular aperture plate inside is provided with powder feeding pipe through hole and gas via-hole, and wherein powder feeding pipe through hole is arranged at annular aperture plate central authorities, is at least provided with 4 gas via-holes around powder feeding pipe through hole.
Invention technical scheme is adopted to have following excellent effect:
(1) a kind of superonic flow nozzzle printed for micro-injection described in, agent structure comprises air chamber body, De Laval noz(zle), latch segment, powder feeding pipe etc., and structure is comparatively compact, is convenient to processing and assembling, reduces costs.
(2) a kind of superonic flow nozzzle printed for micro-injection described in, its De Laval noz(zle) comprises converging portion, throat, divergent section, flat segments, micro-converging portion, wherein converging portion is half elliptic, whole inner flow passage is regular streamlined, the convergence of jet is strengthened while ensure that powder effluxvelocity, in addition, also there is throughput less, the advantage that supersonic speed segment distance is long.
(3) superonic flow nozzzle that a kind of micro-injection described in prints, adopt the air inlet of many air source inlet, and air source inlet symmetrical expression oblique cutting air inlet chamber body rear end at an angle, join in the interaction of annular aperture plate, make powder feeding air-flow more stable, reduce throughput, reduce the requirement to pipeline, decrease energy loss simultaneously, be conducive to the speed that powder reaches larger, in addition, also can effectively prevent spraying powder in the choking phenomenon of De Laval noz(zle) throat.
Accompanying drawing explanation
Fig. 1 is the structural representation of the superonic flow nozzzle for micro-injection printing, 1. De Laval noz(zle), 2. latch segment, 3. air chamber body, 3-1. pressure probe interface, 3-3. temp probe interface, 3-2. air source inlet, 4.U type plug, 5. powder feeding pipe, 6. fastening bolt, 7. annular aperture plate.
Fig. 2 is De Laval noz(zle) structural representation, 1-1. converging portion, 1-2. throat, the 1-3. section of faling apart, 1-4. flat segments, the micro-converging portion of 1-5..
Fig. 3 is the structural representation of air chamber body.
Fig. 4 is the structural representation of latch segment.
Fig. 5 is the structural representation of U-shaped plug.
Fig. 6 is the structural representation of annular aperture plate, 7-1. powder feeding pipe through hole, 7-2. gas via-hole.
Fig. 7 is the numerical analysis figure (unit: m/s) of the flow behavior of cold spraying De Laval noz(zle) in the past.
Fig. 8 is the numerical analysis figure (unit: m/s) of the flow behavior of De Laval noz(zle) of the present invention.
Fig. 9 is the numerical analysis figure (unit: m/s) of the flow behavior of nozzle of the present invention.
Detailed description of the invention
embodiment 1
As shown in figures 1 to 6, for a kind of structural representation of the superonic flow nozzzle for micro-injection printing, it mainly comprises De Laval noz(zle) 1, latch segment 2, air chamber body 3, pressure probe interface 3-1, air source inlet 3-2, temp probe interface 3-3, U-shaped plug 4, powder feeding pipe 5, fastening bolt 6, annular aperture plate 7, De Laval noz(zle) 1 and air chamber body 3 connect into axial symmetry entirety by latch segment 2, and utilize fastening bolt 6 to fix, on the front end of air chamber body 3, under be symmetrically distributed with pressure probe interface 3-1, temp probe interface 3-3, air chamber body 3 end symmetrical oblique cutting has multiple air source inlet 3-2, afterbody is provided with coaxial powder-feeding pipe 5 by U-shaped plug 4, the contact point of De Laval noz(zle) 1 and air chamber body 3 is provided with annular aperture plate 7, gases at high pressure and powder converge and spray in De Laval noz(zle) 1.
The described overall inner flow passage of De Laval noz(zle) 1 is regular streamlined, its head is provided with half elliptic converging portion 1-1, is provided with throat 1-2 after converging portion 1-1, and throat 1-2 is connected with divergent section 1-3, divergent section 1-3 is connected with flat segments 1-4, is provided with micro-converging portion 1-5 after flat segments 1-4.The length of flat segments 1-4 is 50mm, and the length of micro-converging portion 1-5 is the length of 1.5mm, divergent section 1-3 is 12.4mm, and the length of converging portion 1-1 is 11.7mm.The diameter of flat segments 1-4 is 10mm, and the diameter of converging portion 1-1 is 8mm, and the diameter of micro-converging portion 1-5 is 6mm, and the diameter of throat 1-2 is 3mm.Converging portion 1-1 is 60 ° to the convergent angle of throat, and the convergent angle of micro-converging portion 1-5 end is 3 °.The expansion ratio of De Laval noz(zle) 1 is 10, described expansion ratio is the sectional area of the sectional area ratio throat 1-2 of micro-converging portion 1-5 is 10, under the condition of this expansion ratio, working gas and powder are 356m/s from the maximal rate scope of converging portion 1-1, throat 1-2, divergent section 1-3, flat segments 1-4, micro-converging portion 1-5 ejection; Wherein, working gas and powder are greater than flat segments 1-4 from the speed of micro-converging portion 1-5 and are greater than divergent section 1-3 and are greater than throat 1-2 and are greater than converging portion 1-1.
Described air source inlet 3-2 symmetrical expression oblique cutting air inlet chamber body 3 rear end, quantity is 3.
Annular aperture plate 7 inside is provided with powder feeding pipe through hole 7-1 and gas via-hole 7-2, and wherein powder feeding pipe through hole 7-1 is arranged at annular aperture plate 7 central authorities, is at least provided with 4 gas via-hole 7-2 around powder feeding pipe through hole 7-1.
The present invention has carried out structural design according to superonic flow nozzzle principle, and utilizes the CFD analysis software Fluent of popular to carry out check analysis.Consider the convergence requirement increasing powder jet, on the basis of common De Laval noz(zle) four-part form structure, the structure of De Laval noz(zle) is redesigned, add the micro-converging portion impelling powder jet to collect, wherein micro-converging portion length is 10 ~ 30mm, and itself and jet pipe central axis angle are 3 ~ 10 °.In addition, in order to reduce throughput, and then the requirement reduced pipeline, converging portion is designed to half elliptic, it is by by any curve of nozzle throat, obtain around central hub, whole inner flow passage is regular streamlined, other structure divisions design by conventional De Laval noz(zle), nozzle exit is circular, size is φ 2.6 ~ φ 10mm, be cold spraying De Laval noz(zle) and the numerical analysis figure of De Laval noz(zle) of the present invention in identical flow behavior in the past as Figure 7-8, as can be seen from the figure De Laval noz(zle) of the present invention is adopted, higher effluxvelocity can be obtained, be 873m/s to the maximum, and jet in " candle shape ", this will be conducive to powder and will reach its critical speed faster, accelerate the deposition of powder, form finer and close film.And cold spraying De Laval noz(zle) only had 638m/s spray official exit velocity is maximum in the past, described the reasonable part of the present invention's design.
In addition, consider the impact of powder feeding source of the gas on cold spray process, the present invention, air source inlet mode and structure are all redesigned, add the quantity of air source inlet, reach 2-4, and adopt symmetrical expression oblique cutting air inlet chamber body rear end, in conjunction with the effect of annular aperture plate to air-flow, make gas more mild, this will be conducive to gas after by nozzle throat, reach larger speed, be illustrated in figure 9 the numerical analysis figure adopting the nozzle in the present invention to carry out, analog parameter is: inlet pressure 0.8Mpa, temperature 300K, selected source of the gas is perfect gas.As can be seen from the figure, effluxvelocity is 611m/s to the maximum, and jet convergence property is also fine.
embodiment 2
A kind of superonic flow nozzzle printed for micro-injection, it mainly comprises De Laval noz(zle) 1, latch segment 2, air chamber body 3, pressure probe interface 3-1, air source inlet 3-2, temp probe interface 3-3, U-shaped plug 4, powder feeding pipe 5, fastening bolt 6, annular aperture plate 7, De Laval noz(zle) 1 and air chamber body 3 connect into axial symmetry entirety by latch segment 2, and utilize fastening bolt 6 to fix, on the front end of air chamber body 3, under be symmetrically distributed with pressure probe interface 3-1, temp probe interface 3-3, air chamber body 3 end symmetrical oblique cutting has multiple air source inlet 3-2, afterbody is provided with coaxial powder-feeding pipe 5 by U-shaped plug 4, the contact point of De Laval noz(zle) 1 and air chamber body 3 is provided with annular aperture plate 7, gases at high pressure and powder converge and spray in De Laval noz(zle) 1.
The described overall inner flow passage of De Laval noz(zle) 1 is regular streamlined, its head is provided with half elliptic converging portion 1-1, is provided with throat 1-2 after converging portion 1-1, and throat 1-2 is connected with divergent section 1-3, divergent section 1-3 is connected with flat segments 1-4, is provided with micro-converging portion 1-5 after flat segments 1-4.The length of flat segments 1-4 is 40mm, and the length of micro-converging portion 1-5 is the length of 25mm, divergent section 1-3 is 22.5mm, and the length of converging portion 1-1 is 18.3mm.The diameter of flat segments 1-4 is 14.8mm, and the diameter of converging portion 1-1 is 12.6mm, and the diameter of micro-converging portion 1-5 is 2.6mm, and the diameter of throat 1-2 is 1.5mm.Converging portion 1-1 is 60 ° to the convergent angle of throat, and the convergent angle of micro-converging portion 1-5 end is 8 °.The expansion ratio of De Laval noz(zle) 1 is 3.8, described expansion ratio is the sectional area of the sectional area ratio throat 1-2 of micro-converging portion 1-5 is 10, under the condition of this expansion ratio, working gas and powder are 1350m/s from the maximal rate scope of converging portion 1-1, throat 1-2, divergent section 1-3, flat segments 1-4, micro-converging portion 1-5 ejection; Wherein, working gas and powder are greater than flat segments 1-4 from the speed of micro-converging portion 1-5 and are greater than divergent section 1-3 and are greater than throat 1-2 and are greater than converging portion 1-1.
Described air source inlet 3-2 symmetrical expression oblique cutting air inlet chamber body 3 rear end, quantity is 7.
Annular aperture plate 7 inside is provided with powder feeding pipe through hole 7-1 and gas via-hole 7-2, and wherein powder feeding pipe through hole 7-1 is arranged at annular aperture plate 7 central authorities, is at least provided with 4 gas via-hole 7-2 around powder feeding pipe through hole 7-1.
embodiment 3
A kind of superonic flow nozzzle printed for micro-injection, it mainly comprises De Laval noz(zle) 1, latch segment 2, air chamber body 3, pressure probe interface 3-1, air source inlet 3-2, temp probe interface 3-3, U-shaped plug 4, powder feeding pipe 5, fastening bolt 6, annular aperture plate 7, De Laval noz(zle) 1 and air chamber body 3 connect into axial symmetry entirety by latch segment 2, and utilize fastening bolt 6 to fix, on the front end of air chamber body 3, under be symmetrically distributed with pressure probe interface 3-1, temp probe interface 3-3, air chamber body 3 end symmetrical oblique cutting has multiple air source inlet 3-2, afterbody is provided with coaxial powder-feeding pipe 5 by U-shaped plug 4, the contact point of De Laval noz(zle) 1 and air chamber body 3 is provided with annular aperture plate 7, gases at high pressure and powder converge and spray in De Laval noz(zle) 1.
The described overall inner flow passage of De Laval noz(zle) 1 is regular streamlined, its head is provided with half elliptic converging portion 1-1, is provided with throat 1-2 after converging portion 1-1, and throat 1-2 is connected with divergent section 1-3, divergent section 1-3 is connected with flat segments 1-4, is provided with micro-converging portion 1-5 after flat segments 1-4.The length of flat segments 1-4 is 75mm, and the length of micro-converging portion 1-5 is the length of 28.8mm, divergent section 1-3 is 12.5mm, and the length of converging portion 1-1 is 10.6mm.The diameter of flat segments 1-4 is 17.6mm, and the diameter of converging portion 1-1 is 9.5mm, and the diameter of micro-converging portion 1-5 is 4.3mm, and the diameter of throat 1-2 is 3.5mm.Converging portion 1-1 is 60 ° to the convergent angle of throat, and the convergent angle of micro-converging portion 1-5 end is 4 °.The expansion ratio of De Laval noz(zle) 1 is 13.2, described expansion ratio is the sectional area of the sectional area ratio throat 1-2 of micro-converging portion 1-5 is 10, under the condition of this expansion ratio, working gas and powder are 852m/s from the maximal rate scope of converging portion 1-1, throat 1-2, divergent section 1-3, flat segments 1-4, micro-converging portion 1-5 ejection; Wherein, working gas and powder are greater than flat segments 1-4 from the speed of micro-converging portion 1-5 and are greater than divergent section 1-3 and are greater than throat 1-2 and are greater than converging portion 1-1.
Described air source inlet 3-2 symmetrical expression oblique cutting air inlet chamber body 3 rear end, quantity is 5.
Annular aperture plate 7 inside is provided with powder feeding pipe through hole 7-1 and gas via-hole 7-2, and wherein powder feeding pipe through hole 7-1 is arranged at annular aperture plate 7 central authorities, is at least provided with 4 gas via-hole 7-2 around powder feeding pipe through hole 7-1.
Above-described embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, to the amendment and changing of going bail for that the present invention makes, all falls into protection scope of the present invention.
Although more employ: the term such as De Laval noz(zle) 1, latch segment 2, air chamber body 3, pressure probe interface 3-1, temp probe interface 3-3, air source inlet 3-2, U-shaped plug 4, powder feeding pipe 5, fastening bolt 6, annular aperture plate 7, do not get rid of the possibility using other term herein.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (10)
1. the superonic flow nozzzle printed for micro-injection, it mainly comprises De Laval noz(zle) (1), latch segment (2), air chamber body (3), pressure probe interface (3-1), air source inlet (3-2), temp probe interface (3-3), U-shaped plug (4), powder feeding pipe (5), fastening bolt (6), annular aperture plate (7), De Laval noz(zle) (1) and air chamber body (3) connect into axial symmetry entirety by latch segment (2), and utilize fastening bolt (6) to fix, on the front end of air chamber body (3), under be symmetrically distributed with pressure probe interface (3-1), temp probe interface (3-3), air chamber body (3) end symmetrical oblique cutting has multiple air source inlet (3-2), afterbody is provided with coaxial powder-feeding pipe (5) by U-shaped plug (4), the contact point of De Laval noz(zle) (1) and air chamber body (3) is provided with annular aperture plate (7), gases at high pressure and powder converge and spray in De Laval noz(zle) (1).
2. the superonic flow nozzzle printed for micro-injection according to claim 1, it is characterized in that: described De Laval noz(zle) (1) overall inner flow passage is regular streamlined, its head is provided with half elliptic converging portion (1-1), throat (1-2) is provided with after converging portion (1-1), throat (1-2) is connected with divergent section (1-3), divergent section (1-3) is connected with flat segments (1-4), is provided with micro-converging portion (1-5) after flat segments (1-4).
3. the superonic flow nozzzle printed for micro-injection according to claim 2, is characterized in that: the length of flat segments (1-4) is greater than micro-converging portion (1-5) and is greater than divergent section (1-3) and is greater than converging portion (1-1); Wherein, the length of flat segments (1-4) is 30-80mm, and the length of micro-converging portion (1-5) is 10-30mm, and the length of divergent section (1-3) is 10-26mm, and the length of converging portion (1-1) is 10-24mm.
4. the superonic flow nozzzle printed for micro-injection according to claim 2, it is characterized in that: the length of flat segments (1-4) is 50mm, the length of micro-converging portion (1-5) is 15.5mm, and the length of divergent section (1-3) is 12.4mm, and the length of converging portion (1-1) is 11.7mm.
5. the superonic flow nozzzle printed for micro-injection according to claim 2, is characterized in that: the diameter of flat segments (1-4) is greater than converging portion (1-1) and is greater than micro-converging portion (1-5) and is greater than throat (1-2); Wherein, the diameter of flat segments (1-4) is 5-20mm, and the diameter of converging portion (1-1) is 8-15mm, and the diameter of micro-converging portion (1-5) is 2.6-10mm, and the diameter of throat (1-2) is 1.5-3.5mm.
6. the superonic flow nozzzle printed for micro-injection according to claim 2, it is characterized in that: the diameter of flat segments (1-4) is 10mm, the diameter of converging portion (1-1) is 8mm, and the diameter of micro-converging portion (1-5) is 6mm, and the diameter of throat (1-2) is 3mm.
7. the superonic flow nozzzle printed for micro-injection according to claim 2, it is characterized in that: converging portion (1-1) is 60 ° to the convergent angle of throat, the convergent angle of micro-converging portion (1-5) end is 3 °-10 °.
8. the superonic flow nozzzle printed for micro-injection according to claim 1, it is characterized in that: the expansion ratio of De Laval noz(zle) (1) is 3-13.2, described expansion ratio is the sectional area of the sectional area ratio throat (1-2) of micro-converging portion (1-5) is 3 ~ 13.2, under the condition of this expansion ratio, the maximal rate scope that working gas and powder spray from converging portion (1-1), throat (1-2), divergent section (1-3), flat segments (1-4), micro-converging portion (1-5) is 356-1400m/s; Wherein, working gas and powder are greater than flat segments (1-4) from the speed of micro-converging portion (1-5) and are greater than divergent section (1-3) and are greater than throat (1-2) and are greater than converging portion (1-1).
9. the superonic flow nozzzle printed for micro-injection according to claim 1, is characterized in that: described air source inlet (3-2) symmetrical expression oblique cutting air inlet chamber body (3) rear end, quantity is 2 ~ 4.
10. the superonic flow nozzzle printed for micro-injection according to claim 1, it is characterized in that: annular aperture plate (7) inside is provided with powder feeding pipe through hole (7-1) and gas via-hole (7-2), wherein powder feeding pipe through hole (7-1) is arranged at annular aperture plate (7) central authorities, and powder feeding pipe through hole (7-1) is at least provided with 4 gas via-holes (7-2) around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049609.2A CN104690966A (en) | 2015-01-30 | 2015-01-30 | Supersonic nozzle for miniature ink jet printing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510049609.2A CN104690966A (en) | 2015-01-30 | 2015-01-30 | Supersonic nozzle for miniature ink jet printing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105034375A (en) * | 2015-08-17 | 2015-11-11 | 东莞中国科学院云计算产业技术创新与育成中心 | FDM3D printing achieving method, printing system and jet flow control method under space environment |
| WO2016095034A1 (en) * | 2014-12-16 | 2016-06-23 | Sublinove Inc. | Printing apparatus and method for printing |
-
2015
- 2015-01-30 CN CN201510049609.2A patent/CN104690966A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016095034A1 (en) * | 2014-12-16 | 2016-06-23 | Sublinove Inc. | Printing apparatus and method for printing |
| CN105034375A (en) * | 2015-08-17 | 2015-11-11 | 东莞中国科学院云计算产业技术创新与育成中心 | FDM3D printing achieving method, printing system and jet flow control method under space environment |
| CN105034375B (en) * | 2015-08-17 | 2020-04-28 | 东莞中国科学院云计算产业技术创新与育成中心 | FDM3D printing system in space environment and jet flow control method |
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Application publication date: 20150610 |