CN101138791A - Even-sized particles producing device and method for preparing the same - Google Patents
Even-sized particles producing device and method for preparing the same Download PDFInfo
- Publication number
- CN101138791A CN101138791A CNA2007100598937A CN200710059893A CN101138791A CN 101138791 A CN101138791 A CN 101138791A CN A2007100598937 A CNA2007100598937 A CN A2007100598937A CN 200710059893 A CN200710059893 A CN 200710059893A CN 101138791 A CN101138791 A CN 101138791A
- Authority
- CN
- China
- Prior art keywords
- crucible
- vacuum chamber
- drop
- piezoelectric oscillator
- links
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The present invention belongs to technology field of manufacturing metal powder, which specifically relates to a method and a device of manufacturing spheroid metal and alloy granular by making use of uniform liquid drop spray application techniques. Inert gas used by the present invention is bled into a crucible and a vacuum tight chamber that can obtain steady differential pressure by means of pressure control system, which makes mental fusant ejected in the form of laminar jet from a micro-nozzle positioned on a bottom of the crucible. Vibration disturbance mental shooting flow produced by a piezoelectric oscillator turns metal shooting flow into uniform droplets. And real-time size parameters of the droplets mentioned-above can be obtained by camera system and computer analysis software. Subject to the optimum parameters, frequency of control oscillator is fed back, thereby reducing size error of the metal droplets and predetermined droplets. The present invention is able to directly manufacture granular that is homogenized in size, shape and thermodynamic condition. The present invention has short technological process and products have good quality, which greatly reduces equipment investments.
Description
Technical field
The invention belongs to the metal dust preparing technical field, be specifically related to a kind of apparatus and method that adopt the symmetrical liquid drop injecting technology to prepare spherical metal and alloying pellet.
Background technology
The preparation method of metal dust can be divided into physical-chemical process and Mechanical Method two big classes substantially, and wherein Mechanical Method mainly is mechanical crushing method and the direct atomization of metal bath, comprises methods such as mechanical lapping, cold airflow pulverizing, centrifugal pulverizing and atomizing.Table 1 provides the comparison of various powder preparation technology, and as seen, above-mentioned traditional particle or powder preparation method exist shortcomings such as equipment needed thereby is invested greatly or process controllability is poor, and product percent of pass is low.
The comparison of the several frequently seen powder preparation technology of table 1.
| Method | Grain shape | Particle size range (μ m) | The uniform particles degree | Expensive relatively |
| Spining disk method | Spherical | 50-300 | Medium | Office |
| The aerosolization method | Circle, spherical | 15-300 | Medium | Moderate |
| The plasma atomization | Spherical | 5-80 | Good | Office |
| Water atomization | Irregular | 5-800 | Difference | Low |
People such as the Chun of Massachusetts Institute Technology (MIT) and Passow have proposed a kind of novel symmetrical liquid drop production method one symmetrical liquid drop injecting technology on the basis of Rayleigh capillary liquid stream Instability Theory.This technology can obtain size uniform spherical molten drop or particle by the fracture behaviour of control continuous molten metal jet, compares with the conventional particles preparation method to have the technological process weak point, controllability is good, equipment investment is few, production efficiency height, characteristics such as good product quality.On this technical foundation, people's SEPARATE APPLICATION such as Wu Ping, Zhang Shaoming Chinese patent (CN2649227, CN1899732).But because metal jet is subjected to the influence of environment easily in process of production, there is certain grain size distribution in the metallic particles that causes producing, and can't adjust in real time and control in process of production.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, a kind of even metallic particles preparation facilities is provided, preparation facilities provided by the invention, on the basis of existing symmetrical liquid drop injecting device, increased the real time monitoring feedback control system, produce the variation of drop size by monitoring, adjust parameters such as oscillator frequency in real time, thereby reduce to produce the Size Distribution of molten drop, obtain alloying pellet more uniformly.
For this reason, the present invention adopts following technical scheme:
A kind of even-sized particles producing device, comprise vacuum chamber, be fixed on vacuum chamber top crucible, gas pressure regulator, piezoelectric oscillator, signal generator, add battery lead plate, cooling collector and Control System of Microcomputer, wherein, crucible side wall and vacuum chamber the sidewall appendix by separately respectively link to each other with gas pressure regulator with valve, in crucible and vacuum chamber, be respectively arranged with pressure sensor, gas pressure regulator is according to the input adjusting crucible of pressure sensor and the gas pressure in the vacuum chamber, and crucible links to each other with the inert gas storage facilities respectively with vacuum chamber; The bottom of crucible is provided with the micro nozzle that is connected with vacuum chamber, the vibration head of piezoelectric oscillator is positioned at the top of micro nozzle, signal generator generates oscillator signal under the control of Control System of Microcomputer, the oscillator signal of signal generator output is carried on the piezoelectric oscillator; Add battery lead plate, be positioned at vacuum chamber, be arranged on the below of micro nozzle, position relative and nozzle is provided with opening on it; Cooling collector is positioned at the bottom of vacuum chamber; The sidewall of vacuum chamber is provided with and dodges device and camera head frequently, and camera head links to each other with Control System of Microcomputer, and the flicker frequency of dodging the frequency device is subjected to the control of the frequency divider that links to each other with the output of signal generator; Control System of Microcomputer is calculated the diameter of drop, the frequency of oscillation of FEEDBACK CONTROL piezoelectric oscillator according to the image of being gathered.
In the technique scheme, micro nozzle can be the sapphire aperture, and its diameter range can be between 0.050～5.000mm; The vibration frequency range of piezoelectric oscillator can be between 1～20kHz.
As further preferred version, preferably be equipped with the temperature element that links to each other with temperature regulating device in the crucible, the heater of crucible links to each other with temperature regulating device; Preferably be provided with baffle plate between battery lead plate and the cooling collector adding.
The preparation method that the present invention provides a kind of above-mentioned even-sized particles producing device simultaneously and adopted, it comprises the following steps:
(1) opens the crucible loam cake, in crucible, add metal material that needs melting and sealing;
(2) sealed vacuum chamber;
(3) vacuum chamber is vacuumized, crucible and vacuum chamber are charged into inert protective gas;
(4) heating crucible, the metal material in the melting cup;
(5) open piezoelectric oscillator, add voltage to adding battery lead plate, in crucible, import inert protective gas, utilize pressure control device to make and reach stable pressure reduction between crucible and the vacuum chamber, thereby motlten metal is penetrated from the micropore of the crucible bottom form with laminar jet, under the effect of piezoelectric oscillator vibration head, the metal jet of outflow is fractured into uniform drop, all is with the equivalent electric charge at each drop when adding the battery lead plate middle opening;
(6) computer control system is utilized computer image analysis software, calculates the diameter of drop according to the captured drop image of camera head, and FEEDBACK CONTROL is adjusted the frequency that oscillator produces, thereby obtains to set the symmetrical liquid drop of size;
(7) make the symmetrical liquid drop of fracture advance cooling collector, the final set moulding.
As preferred embodiment, preferably be provided with baffle plate between battery lead plate and the cooling collector adding, in execution in step (7) before, utilize baffle plate to stop that drop drops on the cooling collector, treat that the technological parameter adjustment finishes after, remove baffle plate, execution in step (7); Preferably be equipped with the temperature element that links to each other with temperature regulating device in the crucible, the heater of crucible links to each other with temperature regulating device, utilizes temperature regulating device control crucible temperature.
The present invention has following beneficial effect:
1. metallic particles preparation facilities of the present invention and method, process controllability is strong, can control crucible temperature, the pressure differential of crucible and vacuum chamber, especially utilize image surveillance system and circuit feedback control system to adjust the frequency that oscillator produces, molten drop that reduces to produce and the error of setting drop size, thus the metallic particles of the uniform-dimension that obtains has improved production efficiency.
2. with respect to the additive method of present preparation metallic particles, the present invention can directly produce the particle in the homogenization of aspects such as size, shape and thermodynamic condition, and technological process is short, and good product quality greatly reduces equipment investment.
Description of drawings
Fig. 1 prepares the apparatus structure schematic diagram of single-size for real-time monitoring of the present invention.
The specific embodiment
The present invention mainly is to use inert gas (as nitrogen) to inject crucible and vacuum chamber, utilize control pressurer system to make crucible and vacuum chamber reach stable pressure reduction, make metal bath form ejection with laminar jet from the micro nozzle of crucible bottom, according to Rayleigh jet unstability principle, vibrational perturbation metal jet with piezoelectric oscillator produces makes metal jet be fractured into uniform drop.Obtain to produce the real-time dimensional parameters of drop by camera head in conjunction with computer image analysis software, and then, utilize the frequency of circuit feedback control system control generator, molten drop that reduces to produce and the error of setting drop size at optimized parameter.Molten drop is through adding the battery lead plate induction charging, thereby avoids phase inter coagulation in dropping process, and the homogeneous molten drop of generation is frozen into the extraordinary metallic particles of sphericity in cooling fluid.
Below in conjunction with drawings and Examples the present invention is further described.
1. referring to Fig. 1, even-sized particles producing device of the present invention comprises crucible 1, piezoelectric oscillator 2, add battery lead plate 6, baffle plate 8, particle cooling-gatherer 10, vacuum chamber 11, crucible 1 is provided with piezoelectric oscillator 2, and piezoelectric oscillator 2 is connected with signal generator 36 by control line, and the bottom of crucible 1 is inlaid with micro nozzle 5, the vibration head 3 of this piezoelectric oscillator 2 is arranged on the top of micropore 5, crucible 1 lateral wall having heaters 4 has the battery lead plate of adding 6 below crucible 1, adding battery lead plate 6 centres has an opening 7 with respect to the nozzle place.
2. the bottom of vacuum chamber 11 is provided with particle cooling collector 10, and a baffle plate 8 is arranged on the gatherer 10, is fixed on the bottom of vacuum chamber 11 by support 9.
3. crucible 1 top and vacuum chamber 11 tops are connected with appendix 15,16 respectively, appendix 15,16 is connected with valve 17,18 respectively, link to each other with inert gas storage facilities 14 by valve 37 by appendix 19, valve 17,18 is connected with gas pressure regulator 33 by control line 21,20.Gas pressure regulator 33 has two pressure sensors 22,23 to place crucible 1 and vacuum chamber 11 inside respectively.Vacuum chamber 11 right sides link to each other with vacuum valve 24 by appendix 31, are connected with vavuum pump 25 by appendix 32.
4. crucible 1 is built-in with temperature element-thermocouple 12, is connected with temperature regulating device 13 by line, and heater 4 is connected with temperature regulating device 13 by control line.Adding battery lead plate 6 is connected with power supply 30 by lead.
5. vacuum chamber 11 left side walls have one to dodge device 26 frequently, are connected with frequency divider 28 by line, and frequency divider 28 is connected with signal generator 36 in the Control System of Microcomputer 29.Device 26 opposite positions have camera head 27 with dodging frequently on vacuum chamber 11 right sides, are connected with the image collection card 34 of microcomputer control equipment 29 by line.
6. Control System of Microcomputer 29 critical pieces include signal generator 36, image collection card 34 and mainboard 35.Signal generator 36 and image collection card 34 are connected on the computer motherboard 35 by control line respectively.
7. micro nozzle is circular sapphire aperture, and its diameter range is between 0.050～5.000mm, and the vibration frequency range of piezoelectric oscillator is between 1～20kHz.
In the present embodiment, the concrete steps that adopt preparation of granules device of the present invention to prepare even metallic particles are as follows:
(1) opens the crucible loam cake, in crucible, add metal material Sn-3.5Ag-0.5Cu 100g that needs melting and sealing;
(2) cooling fluid is added in the gatherer, baffle plate moves to the top of gatherer, and the sealed vacuum chamber;
(3) crucible and vacuum chamber are vacuumized, and charge into inert protective gas;
(4) heating crucible, the metal material in the melting cup, temperature is incubated a period of time after arriving 250 ℃;
(5) open piezoelectric oscillator, open and add the battery lead plate power supply, voltage is transferred to 300V, in crucible, import nitrogen, utilize control pressurer system to make and reach between crucible and the vacuum chamber and stablize pressure reduction 1.3P
0Thereby motlten metal is penetrated from the micro nozzle of the crucible bottom form with laminar jet, under the effect of piezoelectric oscillator vibration head, the metal jet of outflow is fractured into uniform drop, all is with the equivalent electric charge at each drop when adding the battery lead plate middle opening; Micro nozzle diameter 100 μ m.
(6) utilize the captured drop image of camera head to calculate the diameter of drop accurately in conjunction with computer image analysis software, and adjust the frequency that oscillator produces through the circuit feedback control system, thereby produce the symmetrical liquid drop of setting size, error is in 1%.
(7) remove baffle plate, make the symmetrical liquid drop of fracture advance gatherer, by the moulding of cooling fluid final set.
Claims (8)
1. even-sized particles producing device, comprise vacuum chamber, be fixed on the crucible of vacuum chamber top, gas pressure regulator, piezoelectric oscillator, signal generator, add battery lead plate, cooling collector and Control System of Microcomputer, wherein, crucible side wall and vacuum chamber the sidewall appendix by separately respectively link to each other with gas pressure regulator with valve, in crucible and vacuum chamber, be respectively arranged with pressure sensor, gas pressure regulator is according to the input adjusting crucible of pressure sensor and the gas pressure in the vacuum chamber, and crucible links to each other with the inert gas storage facilities respectively with vacuum chamber; The bottom of crucible is provided with the micro nozzle that is connected with vacuum chamber, the vibration head of piezoelectric oscillator is positioned at the top of micro nozzle, signal generator generates oscillator signal under the control of Control System of Microcomputer, the oscillator signal of signal generator output is carried on the piezoelectric oscillator; Add battery lead plate, be positioned at vacuum chamber, be arranged on the below of micro nozzle, position relative and nozzle is provided with opening on it; Cooling collector is positioned at the bottom of vacuum chamber; The sidewall of vacuum chamber is provided with and dodges device and camera head frequently, and camera head links to each other with Control System of Microcomputer, and the flicker frequency of dodging the frequency device is subjected to the control of the frequency divider that links to each other with the output of signal generator; Control System of Microcomputer is calculated the diameter of drop, the frequency of oscillation of FEEDBACK CONTROL piezoelectric oscillator according to the image of being gathered.
2. even-sized particles producing device according to claim 1 is characterized in that, described micro nozzle is the sapphire aperture, and its diameter range is between 0.050～5.000mm.
3. even-sized particles producing device according to claim 1 is characterized in that the vibration frequency range of piezoelectric oscillator is between 1～20kHz.
4. even-sized particles producing device according to claim 1 is characterized in that described crucible is built-in with the temperature element that links to each other with temperature regulating device, and the heater of crucible links to each other with temperature regulating device.
5. even-sized particles producing device according to claim 1 is characterized in that, is provided with baffle plate adding between battery lead plate and the cooling collector.
6. preparation method that the described even-sized particles producing device of claim 1 is adopted, it comprises the following steps:
(1) opens the crucible loam cake, in crucible, add metal material that needs melting and sealing;
(2) sealed vacuum chamber;
(3) vacuum chamber is vacuumized, crucible and vacuum chamber are charged into inert protective gas;
(4) heating crucible, the metal material in the melting cup;
(5) open piezoelectric oscillator, add voltage to adding battery lead plate, in crucible, import inert protective gas, utilize pressure control device to make and reach stable pressure reduction between crucible and the vacuum chamber, thereby motlten metal is penetrated from the micropore of the crucible bottom form with laminar jet, under the effect of piezoelectric oscillator vibration head, the metal jet of outflow is fractured into uniform drop, all is with the equivalent electric charge at each drop when adding the battery lead plate middle opening;
(6) computer control system is utilized computer image analysis software, calculates the diameter of drop according to the captured drop image of camera head, and FEEDBACK CONTROL is adjusted the frequency that oscillator produces, thereby obtains to set the symmetrical liquid drop of size;
(7) make the symmetrical liquid drop of fracture advance cooling collector, the final set moulding.
7. preparation method according to claim 6 is characterized in that, is provided with baffle plate adding between battery lead plate and the cooling collector, in execution in step (7) before, utilize baffle plate to stop that drop drops on the cooling collector, treat that the technological parameter adjustment finishes after, remove baffle plate, execution in step (7).
8. preparation method according to claim 6 is characterized in that described crucible is built-in with the temperature element that links to each other with temperature regulating device, and the heater of crucible links to each other with temperature regulating device, utilizes temperature regulating device control crucible temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100598937A CN101138791A (en) | 2007-10-16 | 2007-10-16 | Even-sized particles producing device and method for preparing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100598937A CN101138791A (en) | 2007-10-16 | 2007-10-16 | Even-sized particles producing device and method for preparing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101138791A true CN101138791A (en) | 2008-03-12 |
Family
ID=39190988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100598937A Pending CN101138791A (en) | 2007-10-16 | 2007-10-16 | Even-sized particles producing device and method for preparing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101138791A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244460B (en) * | 2008-03-13 | 2010-06-02 | 大连理工大学 | Method for producing minuteness conductive fiber |
| CN102319554A (en) * | 2011-06-13 | 2012-01-18 | 太仓市华利达实验设备有限公司 | Automatic temperature-regulation pressure-regulation vibrator |
| CN102736450A (en) * | 2012-06-15 | 2012-10-17 | 华中科技大学 | Metallic target generator without vibrating rod |
| CN104588673A (en) * | 2015-01-28 | 2015-05-06 | 大连理工大学 | Device and method for efficiently preparing metal spherical ultrafine powder |
| CN108405873A (en) * | 2018-04-26 | 2018-08-17 | 白西燕 | A kind of nanometer metal micropowder preparation method and its preparation system |
| CN109907880A (en) * | 2019-04-15 | 2019-06-21 | 江苏师范大学 | The eyedrop drip system of eyes treatment |
| CN109965327A (en) * | 2019-04-04 | 2019-07-05 | 盐城市元炟科技有限公司 | A kind of seamless soft capsule dripping pill device and dripping forming method |
| CN110025427A (en) * | 2019-04-15 | 2019-07-19 | 江苏师范大学 | Eye drip medicine device |
| CN110051466A (en) * | 2019-04-15 | 2019-07-26 | 江苏师范大学 | A kind of Tropfen system cured for ophthalmology |
| CN110116214A (en) * | 2019-04-26 | 2019-08-13 | 西北工业大学 | The uniform tin alloy ball side direction perturbation of micron order sprays preparation facilities |
| CN110842209A (en) * | 2019-12-23 | 2020-02-28 | 北京工业大学 | Device for preparing uniform metal particles through pressure difference regulation and electromagnetic disturbance |
| CN113020607A (en) * | 2021-02-06 | 2021-06-25 | 北华航天工业学院 | Device for preparing micro solder balls for chip scale packaging through electromagnetic disturbance and flow focusing |
| CN113263181A (en) * | 2021-04-29 | 2021-08-17 | 大连理工大学 | Method for efficiently preparing spherical metal microparticles with uniform and controllable particle size and preparation device thereof |
| CN113909481A (en) * | 2021-10-11 | 2022-01-11 | 紫金矿业集团股份有限公司 | Method and device for preparing high-quality gold evaporation material |
| CN114918418A (en) * | 2022-05-30 | 2022-08-19 | 广东长信精密设备有限公司 | Granulating device |
-
2007
- 2007-10-16 CN CNA2007100598937A patent/CN101138791A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244460B (en) * | 2008-03-13 | 2010-06-02 | 大连理工大学 | Method for producing minuteness conductive fiber |
| CN102319554A (en) * | 2011-06-13 | 2012-01-18 | 太仓市华利达实验设备有限公司 | Automatic temperature-regulation pressure-regulation vibrator |
| CN102736450A (en) * | 2012-06-15 | 2012-10-17 | 华中科技大学 | Metallic target generator without vibrating rod |
| CN102736450B (en) * | 2012-06-15 | 2014-10-29 | 华中科技大学 | Metallic target generator without vibrating rod |
| CN104588673A (en) * | 2015-01-28 | 2015-05-06 | 大连理工大学 | Device and method for efficiently preparing metal spherical ultrafine powder |
| CN108405873A (en) * | 2018-04-26 | 2018-08-17 | 白西燕 | A kind of nanometer metal micropowder preparation method and its preparation system |
| CN109965327A (en) * | 2019-04-04 | 2019-07-05 | 盐城市元炟科技有限公司 | A kind of seamless soft capsule dripping pill device and dripping forming method |
| CN110025427A (en) * | 2019-04-15 | 2019-07-19 | 江苏师范大学 | Eye drip medicine device |
| CN109907880A (en) * | 2019-04-15 | 2019-06-21 | 江苏师范大学 | The eyedrop drip system of eyes treatment |
| CN110051466A (en) * | 2019-04-15 | 2019-07-26 | 江苏师范大学 | A kind of Tropfen system cured for ophthalmology |
| CN110025427B (en) * | 2019-04-15 | 2021-07-20 | 江苏师范大学 | Eye drop device |
| CN110051466B (en) * | 2019-04-15 | 2021-07-20 | 江苏师范大学 | A drip medicine system for ophthalmology is treated |
| CN110116214A (en) * | 2019-04-26 | 2019-08-13 | 西北工业大学 | The uniform tin alloy ball side direction perturbation of micron order sprays preparation facilities |
| CN110842209A (en) * | 2019-12-23 | 2020-02-28 | 北京工业大学 | Device for preparing uniform metal particles through pressure difference regulation and electromagnetic disturbance |
| CN113020607A (en) * | 2021-02-06 | 2021-06-25 | 北华航天工业学院 | Device for preparing micro solder balls for chip scale packaging through electromagnetic disturbance and flow focusing |
| CN113020607B (en) * | 2021-02-06 | 2024-03-12 | 北华航天工业学院 | Device for preparing micro solder balls for chip level packaging by electromagnetic disturbance and flow focusing |
| CN113263181A (en) * | 2021-04-29 | 2021-08-17 | 大连理工大学 | Method for efficiently preparing spherical metal microparticles with uniform and controllable particle size and preparation device thereof |
| CN113909481A (en) * | 2021-10-11 | 2022-01-11 | 紫金矿业集团股份有限公司 | Method and device for preparing high-quality gold evaporation material |
| CN114918418A (en) * | 2022-05-30 | 2022-08-19 | 广东长信精密设备有限公司 | Granulating device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101138791A (en) | Even-sized particles producing device and method for preparing the same | |
| CN100503091C (en) | Uniform liquid drop injecting three-dimensional fast shaping method and apparatus thereof | |
| CN101279372B (en) | Method and device for preparing microparticles by splitting liquid drop using electric charge oscillation method | |
| CN205414417U (en) | Device of plasma atomizing preparation high performance powder for vibration material disk | |
| US20210308763A1 (en) | Apparatus and method for efficiently preparing ultrafine spherical metal powder by one-by-one droplets centrifugal atomization method | |
| CN104588673B (en) | A kind of device and method for efficiently preparing metal ball shaped superfine powder | |
| CN101140889A (en) | Automatic welding ball packaging metal ball embedding method and apparatus | |
| CN107824793B (en) | Device and method for preparing superfine monodisperse metal microspheres | |
| WO2020063623A1 (en) | Device and method for preparing spherical metal powder based on one-by-one atomization method for uniform droplets | |
| CN104588674A (en) | High efficiency superfine spherical metal powder preparation method and device | |
| CN104550988A (en) | Method and device for preparation of superfine spherical metal powder on basis of uniform droplet spray method | |
| CN103008672A (en) | Method and device for efficiently preparing uniform spherical micro-particle through pulse small-hole multi-vibrating-rod injection process | |
| CN106925786A (en) | Many uniform particle sizes' spherical powder batch preparation facilities and method based on the injection of homogeneous metal drop | |
| CN104550989A (en) | Method and device for preparing superfine spherical metal powder for 3D printing | |
| CN105945285A (en) | Method and device for preparing lattice structure parts from uniform metal droplets | |
| WO2020063622A1 (en) | Device and method for preparing spherical metal powder for 3d printing | |
| CN106112002A (en) | A kind of use circulation air be that medium is prepared metallic particles and reclaims the apparatus and method of heat | |
| CN104493186A (en) | Device and method for manufacturing uniform spherical micro-particles | |
| CN109622980A (en) | A kind of contactless powder by atomization device and method of molten metal ultrasonic standing wave | |
| CN101279371A (en) | Method and device for preparing micro-uniform grain using harmonic method | |
| CN204818071U (en) | Preparation metal spherical powder's for vibration material disk device | |
| US8465680B2 (en) | Method for pelleting spherical fine particle of sodium nitrate | |
| CN102335743A (en) | Ultrasonic spray-forming method | |
| CN103586122A (en) | Micron-size industrial continuous material low-temperature pulverizing system | |
| CN205732986U (en) | Atomized metal pow der produces equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080312 |