CN206065418U - A kind of powder by gas-atomization equipment - Google Patents
A kind of powder by gas-atomization equipment Download PDFInfo
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- CN206065418U CN206065418U CN201620915802.XU CN201620915802U CN206065418U CN 206065418 U CN206065418 U CN 206065418U CN 201620915802 U CN201620915802 U CN 201620915802U CN 206065418 U CN206065418 U CN 206065418U
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Abstract
The utility model discloses a kind of powder by gas-atomization equipment, which belongs to metal dust manufacturing technology field, and the rotary bracket for placing tinsel charging tray is provided with the raw material cabin of powder manufacturing apparatus；Working chamber is connected with raw material cabin, is inside provided with induction coil and the wire-directed on rotary bracket is entered the wire-feed motor of induction coil overcentre；Nebulizer is connected with working chamber, and in the nebulizer, the upper end open of atomizer is towards induction coil；Atomisation tower and cyclone separator are connected with each other, and the top of atomisation tower is connected with nebulizer；Vacuum system is connected with atomisation tower.Above-mentioned powder manufacturing apparatus replaces bar-like raw material using tinsel, improves the utilization rate and production efficiency of atomization gas, reduces the cost that gas atomization manufactures metal dust；The drop of small dimension is conducive to obtaining the higher degree of superheat, so as to improve fine powder content in atomized powder.
Description
Technical field
This utility model is related to metal dust manufacturing technology field, more particularly to a kind of powder by gas-atomization equipment.
Background technology
Globular metallic powder is due to having the advantages that good mobility, stable apparent density, thus becomes metal 3D
The indispensable raw material and consumptive material in the field such as printing, surface cladding, spraying, metal injection molded.Ball is manufactured using Gas atomization techniques
Shape metal powder becomes one of method for industrially commonly using, manufactures particularly with the globular metallic powder of titanium, zirconium and its alloy
Field is even more so.The technology for generally adopting at present be with high frequency tape winding, without crucible induction heating mode melt raw material rod,
Continuously or semi-continuously drop is formed, and recycles gases at high pressure spherical metal and alloy powder to be manufactured by gas atomizing nozzle.
There are following shortcomings in the process for sized spherical titanium powder being manufactured by above-mentioned technique：
Fuel rod weight is little, and technical process is discontinuous, and high-pressure atomisation gas utilization rate is low, atomized powder high cost.It is above-mentioned
Technique adopts 20～100mm of diameter, and the pole of 200～1000mm of length is raw material, and single weight is at hundreds of grams to tens of kilograms
Between.And need to change fuel rod after the completion of every fuel rod atomization, this process includes：Above carry chuck, closing feeding chamber, change
A series of processes such as fuel rod, evacuation, inflation, the decline of new charge bar.During this period to ensure the stability of atomization process state,
The supply of atomization gas at nozzle must be maintained, that is to say, that have substantial amounts of high-pressure atomisation gas consumption during this period and have no
Powder output.The operating time of this process increases with fuel rod length and extends, and gas consumption is also increased dramatically.Generally,
Atomization gas are used for effective workable proportions for dusting between 20%～60%, and the sky of atomization gas blows and considerably increases gas mist
Change powder manufacturing cost, directly result in gas atomized powder cost and remain high.And increase merely fuel rod diameter or length
The volume and energy consumption that will also result in equipment is increased considerably, so as to considerably increase equipment manufacturing cost and to site requirements, economy
Difference.
Molten metal droplet size is larger, the degree of superheat is limited, and the atomized powder granularity of acquisition is difficult to further refine.It is former
Charge bar is progressively melted under radio-frequency induction coil heating, and the molten drop of melting is under gravity from the tip of fuel rod bottom
Drippage, into atomizer, under gases at high pressure effect is atomized solidification and forms globular metallic powder.The granularity of metal dust be by
What gas pressure (or atomizing gas velocities) and molten drop temperature (being proportional to melt viscosity) were together decided on.Pressure is bigger, gas
Stream is faster, atomization strength is bigger, and powder is thinner；Equally, the temperature of molten drop is higher, drop viscosity is less, easier by mist
The thinner metal dust of chemical conversion.Between 20～60Bar, the consideration used based on equipment safety is atomized conventional atomizing pressure
Pressure infinitely can not possibly be lifted.Therefore, under certain atomizing pressure, the degree of superheat of molten drop just becomes impact metal dust grain
The key factor of degree.And current gas atomization equipment is larger due to fuel rod, molten metal liquid volume and weight compared with
Greatly, therefore, often drop not yet reaches the higher degree of superheat and just falls into atomizer under gravity, therefore the gold for obtaining
Category powder size is thicker.In concentrating on the powder received, less than 40 μm moiety contents are relatively low, it is difficult to meet high accuracy 3D and beat
The requirement of the applications such as print, metal powder injection molding.
Further, the defect that the process of above-mentioned technique manufacture sized spherical titanium powder is also present is, using expensive high-pressure atomisation gas
The pressure differential of working chamber and aerochamber is maintained, causes atomized powder manufacturing cost to remain high.Make during powder by gas-atomization
High-pressure atomisation gas for power are maximum into origin, for the high-pressure atomization gas for maintaining working chamber's pressure stability to be filled with
Cause certain gas to waste, increase the cost of gas atomization metal dust.
In addition, the atomizer aperture at present used by technology is larger, atomization gas consume big.Existing atomizer is basis
Existing drop size matched design, center bore is usually between 15～20mm.Under identical atomization gas flow rate, aperture is got over
Greatly, the bigger, expense of atomization gas flow consumption is higher, and this just considerably increases the cost of gas atomization metal dust.
Utility model content
The purpose of this utility model is to provide a kind of powder by gas-atomization equipment, its can continuously production operation, operation imitates
Rate is high, and energy consumption is low, and low production cost is higher as the metal dust quality of product.
It is that, up to this purpose, this utility model is employed the following technical solutions：
A kind of powder by gas-atomization equipment includes：
Raw material cabin, is provided with the rotary bracket for placing tinsel charging tray in which；
Working chamber, which is connected with the raw material cabin, is inside provided with induction coil and by the tinsel on the rotary bracket
It is guided into the wire-feed motor of the induction coil overcentre；
Nebulizer, which is connected with the working chamber, and in the nebulizer, the upper end open of atomizer is towards the line of induction
Circle；
The atomisation tower being connected with each other and cyclone separator, the top of the atomisation tower are connected with the nebulizer；
Vacuum system, which is connected with the atomisation tower.
Preferably, the powder by gas-atomization equipment also includes：
Tail drain filter；
Exhaustor, which is connected with the tail drain filter；
Interior circulation blower fan, which is connected with the working chamber and the exhaustor.
Preferably, the powder by gas-atomization equipment also includes：
Straightener, which is built in the melting room, between the wire-feed motor and sensing quoit, is worn for tinsel
Cross.
Preferably, the powder by gas-atomization equipment also includes：
Powder collecting tank, which is connected with the meal outlet of the cyclone separator.
Preferably, the working chamber is vacuum-packed Double water-cooled structure, side offers observation window.
Preferably, the atomisation tower is Double water-cooled structure.
Preferably, the induction coil is red copper material, single turn or multi-turn structure, indoor design has sectional area to be not less than
4 square millimeters of cooling water channel.
Preferably, the aperture of the atomizer is 4mm～20mm.
Powder by gas-atomization equipment provided by the utility model, which brings following technique effect：
1. bar-like raw material is replaced using tinsel, eliminate, so that
Raw material can significantly be extended the stream time of atomization process, improve atomization gas with continual continuous wire feed
Utilization rate and production efficiency, reduce the cost that gas atomization manufactures metal dust；
2. the drop of small dimension is conducive to obtaining the higher degree of superheat, so as to improve fine powder content in atomized powder, carries
The quality of powder is risen.
3. the aerofluxuss after atomization are pressurized using the circulating fan of adjustable speed and are returned and filled as in melting room, to remain molten
Operating pressure between refining room and aerochamber is poor, so as to save the consumption of high-pressure atomisation gas, reduces atomized powder synthesis
Cost.
Description of the drawings
Fig. 1 is the schematic diagram of the powder by gas-atomization equipment provided by this utility model embodiment.
In figure：1- raw material cabins, 101- rotary brackets, 2- working chambers, 21- observation windows, 201- induction coils, 202- wire feeds
In machine, 301- atomizers, 4- atomisation towers, 5- cyclone separator, 6- tail drain filters, 7- exhaustors, 701- drain taps, 8-
Circulating fan, 9- vacuum systems, 10- straighteners, 11- powder collecting tanks.
Specific embodiment
The technical solution of the utility model is further illustrated below in conjunction with the accompanying drawings and by specific embodiment.
Embodiment one
As shown in figure 1, a kind of powder by gas-atomization equipment, including raw material cabin 1, working chamber 2, nebulizer, atomisation tower 4, rotation
Wind separator 5, and vacuum system 9.Wherein, raw material cabin 1 is vacuum seal structure, and the rotation for placing tinsel charging tray is provided with which
Bracket 101.Working chamber 2 is connected with raw material cabin 1, and is connected with the raw material cabin 1, and the two and the external world seal off.Melting
Room 2 is vacuum-packed Double water-cooled structure, and side offers observation window 21 and can monitor fusing atomization process, and observation window 21 is preferred
Quartz glass is made, and can device activity dark slide.
Induction coil 201 is provided with working chamber 2 and the wire-directed on rotary bracket is entered into 201 center of induction coil
Top wire-feed motor 202, in order to ensure convey it is wiry during, position wiry does not shift so as to exactly
201 overcentre of induction coil is sent to, then the setting straightener 10 between wire-feed motor 202 and induction coil 201.Wire-feed motor
202 can carry out speed governing according to demand, and its conveying tinsel enters straightener 10, and the continuous metal silk after aligning is just to induction coil
201 center, from top to bottom into induction coil 201.According to the diameter of continuous metal silk, replaceable different wire feed rolls and aligning
Wheel.Continuous metal silk diameter is between 1mm～5mm.Induction coil 201 be red copper material, single turn or multi-turn structure, indoor design
There is cooling water channel of the sectional area not less than 4 square millimeters.Induction coil 201 is by the power supply outside adpting flange and working chamber 2
Electrode is connected, and while connects coil cooling water channel.Cooling water channel is connected with the cooling system outside equipment.The power supply of induction coil
There is provided by the high frequency electric source being positioned over outside sealed shell of tank, between 100kHz～1MHz, peak power is not less than its operating frequency
10kW。
Nebulizer is connected with working chamber 2, and in the nebulizer, the upper end open of atomizer 301 towards induction coil 201 is
Lifting atomizing effect, it is preferable that the opening of atomizer 301 is coaxially disposed with induction coil 201 in nebulizer.The nebulizer
It is to aim at fine drop or flow setup, the aperture of atomizer 301 is 4mm～20mm.
Vacuum system 9, which is connected with atomisation tower 4, for device interior evacuation.Atomisation tower 4 is Double water-cooled structure,
It is connected with nebulizer at the top of which, bottom is connected with the top of cyclone separator 5 by pipeline.Add for the ease of the powder by made by
With collect, then, on the meal outlet of cyclone separator 5, be connected with a powder collecting tank 11, thus, made by powder just can collect
In powder collecting tank 11, then turning at it.Certainly, those skilled in the art also can with other container collection powder,
Or directly connect packing material on the meal outlet of cyclone separator 5, collect directly packing delivery after powder.
Above-mentioned gas powder by atomization equipment, its milling method are as follows：
A) by the rotary bracket in metal wire feedstock charging feedstock storehouse, and the tinsel drawn is loaded into wire-feed motor, is adjusted
Section wire-feed motor conveys speed wiry in 1mm/s～1000mm/s times, and conveying tinsel is to above induction coil；
B) start cooling water, close working chamber, atomisation tower, the hatch door of cyclone separator, seal complete equipment, start vacuum
System, to required vacuum, the vacuum can be arranged on 0.001Pa～500Pa according to practical situation to the air in emptying equipment
Between；
C) vacuum system is closed, atomization gas are filled with into equipment；
D) start nebulizer, and high-pressure atomisation gas are supplied to nebulizer, and maintain the work pressure of working chamber and atomisation tower
Power is poor, and the operating pressure difference is 100Pa～100000Pa；
E) start induction coil, heat fusing metal silk, and induction coil power and conveying gold are adjusted according to fusing situation
The speed of category silk, continuously or semi-continuously persistently melts and is atomized to drop；
F) treat that whole disk continuous metal silk fusing is completed, phased out wire-feed motor, induction coil and atomization gas supply, from powder
Atomized metal powder is obtained in last collecting tank.
Powder by gas-atomization equipment and its milling method that above-described embodiment one is provided, replace bar-shaped original using tinsel
Material, so that raw material can be tens of to hundreds of kilograms with continual continuous wire feed so that uninterrupted atomization cycle is from original
Several tens minutes extend to tens of hours even more than a couple of days, it is to avoid prior art several minutes are accomplished by changing the feelings of fuel rod
Condition, fully meets Production requirement.Simultaneously as in the continuous working cycle, all times are used for melting and powder by atomization,
Without the pause neutral phase changed needed for raw material, while also eliminating the unnecessary consumption of neutral gear phase a large amount of atomization gas, both carried
The utilization rate of atomization gas is risen.Work efficiency is improve again, such that it is able to be effectively reduced the cost of powder by gas-atomization.
Due to adopting tinsel for raw material, drop size reduces, and is more easy to obtain the higher degree of superheat, so as to improve fine powder
Last content, improves powder properties.
Embodiment two
As shown in figure 1, a kind of powder by gas-atomization equipment, including raw material cabin 1, working chamber 2, nebulizer, atomisation tower 4, rotation
Wind separator 5, tail drain filter 6, exhaustor 7, interior circulation blower fan 8 and vacuum system 9.Wherein, raw material cabin 1 is tied for vacuum sealing
Structure, is provided with the rotary bracket 101 for placing tinsel charging tray in which.Working chamber 2 is connected with raw material cabin 1, and is connected with the raw material cabin 1
It is integral, the two and extraneous seal isolation.Working chamber 2 is vacuum-packed Double water-cooled structure, and side offers observation window 21
Fusing atomization process can be monitored, 21 preferred quartz glass of observation window is made, and can device activity dark slide.
Induction coil 201 is provided with working chamber 2 and the wire-directed on rotary bracket is entered into 201 center of induction coil
Top wire-feed motor 202, in order to ensure convey it is wiry during, position wiry does not shift so as to exactly
201 overcentre of induction coil is sent to, then the setting straightener 10 between wire-feed motor 202 and induction coil 201.Wire-feed motor
202 can carry out speed governing according to demand, and its conveying tinsel enters straightener 10, and the continuous metal silk after aligning is just to induction coil
201 center, from top to bottom into induction coil 201.According to the diameter of continuous metal silk, replaceable different wire feed rolls and aligning
Wheel.Continuous metal silk diameter is between 1mm～5mm.Induction coil 201 be red copper material, single turn or multi-turn structure, indoor design
There is cooling water channel of the sectional area not less than 4 square millimeters.Induction coil 201 is by the power supply outside adpting flange and working chamber 2
Electrode is connected, and while connects coil cooling water channel.Cooling water channel is connected with the cooling system outside equipment.The power supply of induction coil
There is provided by the high frequency electric source being positioned over outside sealed shell of tank, between 100kHz～1MHz, peak power is not less than its operating frequency
10kW。
Nebulizer is connected with working chamber 2, and in the nebulizer, the upper end open of atomizer 301 towards induction coil 201 is
Lifting atomizing effect, it is preferable that the opening of atomizer 301 is coaxially disposed with induction coil 201 in nebulizer.The atomization
Device is to aim at fine drop or flow setup, and the aperture of atomizer 301 is 4mm～20mm.
Vacuum system 9, which is connected with atomisation tower 4, for device interior evacuation.Atomisation tower 4 is Double water-cooled structure,
It is connected with nebulizer at the top of which, bottom is connected with the top of cyclone separator 5 by pipeline.The top of the cyclone separator 5 leads to
Piping is connected with the bottom of tail drain filter 6.Collected for the ease of the powder by made by, then, cyclone separator 5
A powder collecting tank 11 is connected with meal outlet, thus, made by powder just can collect in powder collecting tank 11, then turn to
At it.Certainly, those skilled in the art also with other container collection powder, or directly can go out powder in cyclone separator 5
Connect packing material on mouthful, collect directly packing delivery after powder.
The top of tail drain filter 6 is connected with exhaustor 7, the gas after filtration can Jing exhaustors 7 discharge.On exhaustor 7
Equipped with drain tap 701, this valve 701 can be opened when aerofluxuss are needed, or drain tap 701 is selected into pressure valve, be treated
When pressure in exhaustor 7 reaches a certain threshold value, pressure valve is opened, gas is discharged.
Interior circulation blower fan 8 is connected with working chamber 2 and exhaustor 7 by pipeline.Interior circulation blower fan 8, exhaustor 7 and air bleeding valve
Door 701 constitutes interior circulation Pressure Maintenance System, is filled with working chamber for the atmospheric exhaust after Partial filtration to be pressurized to return again
2, to maintain the pressure differential between working chamber 2 and atomisation tower 4 needed for normal work.According to technique needs, interior circulation blower fan 8 is adjustable
Speed, to realize that pressure differential regulates and controls.
Above-mentioned gas powder by atomization equipment, its milling method are as follows：
A) by the rotary bracket in metal wire feedstock charging feedstock storehouse, and the tinsel drawn is loaded into wire-feed motor, is adjusted
Section wire-feed motor conveys speed wiry in 1mm/s～1000mm/s times, and conveying tinsel is to above induction coil；
B) start cooling water, close working chamber, atomisation tower, cyclone separator, the hatch door of tail drain filter, sealing the whole series set
It is standby, start vacuum system, to required vacuum, the vacuum can be arranged on the air in emptying equipment according to practical situation
Between 0.001Pa～500Pa；
C) vacuum system is closed, atomization gas is filled with into equipment, and it is poor with the gas outlet of exhaustor formation initial pressure,
The initial pressure difference is 100Pa～100000Pa；
D) start nebulizer, interior circulation blower fan, tail drain filter, and high-pressure atomisation gas are supplied to nebulizer, it is appropriate to adjust
Section interior circulation rotation speed of fan to maintain the operating pressure of working chamber and atomisation tower poor, operating pressure difference be 100Pa～
100000Pa；
E) start induction coil, heat fusing metal silk, and induction coil power and conveying gold are adjusted according to fusing situation
The speed of category silk, continuously or semi-continuously persistently melts and is atomized to drop；
F) treat that whole disk continuous metal silk fusing is completed, phased out wire-feed motor, induction coil and atomization gas supply, from powder
Atomized metal powder is obtained in last collecting tank.
Powder by gas-atomization equipment and its milling method that above-described embodiment two is provided, replace bar-shaped original using tinsel
Material, so that raw material can be tens of to hundreds of kilograms with continual continuous wire feed so that uninterrupted atomization cycle is from original
Several tens minutes extend to tens of hours even more than a couple of days, it is to avoid prior art several minutes are accomplished by changing the feelings of fuel rod
Condition, fully meets Production requirement.Simultaneously as in the continuous working cycle, all times are used for melting and powder by atomization,
Without the pause neutral phase changed needed for raw material, while the unnecessary consumption of neutral gear phase a large amount of atomization gas is also eliminated, both
Improve the utilization rate of atomization gas.Work efficiency is improve again, such that it is able to be effectively reduced the cost of powder by gas-atomization.
Due to adopting tinsel for raw material, drop size reduces, and is more easy to obtain the higher degree of superheat, so as to improve fine powder
Last content, improves powder properties.
Adopt interior circulation Pressure Maintenance System to maintain the pressure differential of working chamber and atomisation tower, it is to avoid use high-pressure atomization
Gas this expensive source of the gas, so as to save the use of atomization gas, also reduces powder manufacturing cost.
Droplet matches little latus rectum atomizer nozzle, and nebulizer internal diameter significantly reduces, so that equal atomization air flow
Under the requirement of speed, atomization gas consumption can be greatly reduced, and this has been greatly reduced production cost so that air supply system is loaded
Reduce, complete equipment cost is lower.
Obviously, above-described embodiment of the present utility model is used for the purpose of clearly explanation this utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need to give to all of embodiment
It is exhaustive.All any modification, equivalent and improvement made within spirit of the present utility model and principle etc., should be included in
Within this utility model scope of the claims.
Claims (8)
1. a kind of powder by gas-atomization equipment, it is characterised in that include：
Raw material cabin, is provided with the rotary bracket for placing tinsel charging tray in which；
Working chamber, which is connected with the raw material cabin, is inside provided with induction coil and by the wire-directed on the rotary bracket
Into the wire-feed motor of the induction coil overcentre；
Nebulizer, which is connected with the working chamber, and in the nebulizer, the upper end open of atomizer is towards the induction coil；
The atomisation tower being connected with each other and cyclone separator, the top of the atomisation tower are connected with the nebulizer；
Vacuum system, which is connected with the atomisation tower.
2. powder by gas-atomization equipment according to claim 1, it is characterised in that also include：
Tail drain filter；
Exhaustor, which is connected with the tail drain filter；
Interior circulation blower fan, which is connected with the working chamber and the exhaustor.
3. powder by gas-atomization equipment according to claim 1, it is characterised in that also include：
Straightener, which is built in the melting room, between the wire-feed motor and sensing quoit, is passed through for tinsel.
4. powder by gas-atomization equipment according to claim 1, it is characterised in that also include：
Powder collecting tank, which is connected with the meal outlet of the cyclone separator.
5. powder by gas-atomization equipment according to claim 1, it is characterised in that：The working chamber is vacuum-packed double
Layer water-cooling structure, side offers observation window.
6. powder by gas-atomization equipment according to claim 1, it is characterised in that：The atomisation tower is Double-layer water cold junction
Structure.
7. powder by gas-atomization equipment according to claim 1, it is characterised in that：The induction coil is red copper material,
Single turn or multi-turn structure, indoor design have cooling water channel of the sectional area not less than 4 square millimeters.
8. powder by gas-atomization equipment according to claim 1, it is characterised in that：The aperture of the atomizer is 4mm
～20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620915802.XU CN206065418U (en) | 2016-08-19 | 2016-08-19 | A kind of powder by gas-atomization equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620915802.XU CN206065418U (en) | 2016-08-19 | 2016-08-19 | A kind of powder by gas-atomization equipment |
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| CN206065418U true CN206065418U (en) | 2017-04-05 |
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ID=58430808
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106041107A (en) * | 2016-08-19 | 2016-10-26 | 赵文天 | Gas atomization powder production equipment and powder production method thereof |
| CN107096925A (en) * | 2017-05-10 | 2017-08-29 | 江苏天楹环保能源成套设备有限公司 | A kind of new plasma atomization prepares ball-type powder model system |
| CN107570717A (en) * | 2017-07-12 | 2018-01-12 | 张家港创博金属科技有限公司 | A kind of pollution-free method and device for preparing uniform grading active metal spherical powder |
| CN114472905A (en) * | 2022-01-17 | 2022-05-13 | 江苏威拉里新材料科技有限公司 | Rapid air supply device for gas atomization powder making equipment and use method thereof |
| EP4034320B1 (en) | 2019-09-24 | 2023-07-19 | Ald Vacuum Technologies GmbH | Device for atomizing a melt stream by means of a gas |
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2016
- 2016-08-19 CN CN201620915802.XU patent/CN206065418U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106041107A (en) * | 2016-08-19 | 2016-10-26 | 赵文天 | Gas atomization powder production equipment and powder production method thereof |
| CN107096925A (en) * | 2017-05-10 | 2017-08-29 | 江苏天楹环保能源成套设备有限公司 | A kind of new plasma atomization prepares ball-type powder model system |
| CN107570717A (en) * | 2017-07-12 | 2018-01-12 | 张家港创博金属科技有限公司 | A kind of pollution-free method and device for preparing uniform grading active metal spherical powder |
| EP4034320B1 (en) | 2019-09-24 | 2023-07-19 | Ald Vacuum Technologies GmbH | Device for atomizing a melt stream by means of a gas |
| CN114472905A (en) * | 2022-01-17 | 2022-05-13 | 江苏威拉里新材料科技有限公司 | Rapid air supply device for gas atomization powder making equipment and use method thereof |
| CN114472905B (en) * | 2022-01-17 | 2024-02-23 | 江苏威拉里新材料科技有限公司 | Quick air supplementing device for aerosolized powder making equipment and application method of quick air supplementing device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20170405 Termination date: 20190819 |