CN1161188C - Cold air driven spray painter - Google Patents
Cold air driven spray painter Download PDFInfo
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- CN1161188C CN1161188C CNB011281308A CN01128130A CN1161188C CN 1161188 C CN1161188 C CN 1161188C CN B011281308 A CNB011281308 A CN B011281308A CN 01128130 A CN01128130 A CN 01128130A CN 1161188 C CN1161188 C CN 1161188C
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- 239000007921 spray Substances 0.000 title claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 98
- 230000008602 contraction Effects 0.000 claims abstract description 14
- 230000007704 transition Effects 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 19
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 30
- 239000011248 coating agent Substances 0.000 description 27
- 239000003570 air Substances 0.000 description 25
- 239000007789 gas Substances 0.000 description 23
- 238000005507 spraying Methods 0.000 description 17
- 239000011159 matrix material Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- -1 pottery Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000635 Spelter Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010285 flame spraying Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000005749 Copper compound Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010288 cold spraying Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229940058401 polytetrafluoroethylene Drugs 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The present invention relates to a cold air driven spray device. The present invention is composed of a supersonic nozzle, a heater, a powder feeder, etc., wherein the supersonic nozzle is arranged at the point of an inlet of a spray chamber, a controller is connected to an air compressor with a gas storing tank, the controller is connected with the heater and the powder feeder respectively through a powder feeding switch and a pressure regulating switch, one end of the heater is communicated with the supersonic nozzle, an outlet of the spray chamber is additionally provided with a powder recovery device, and the supersonic nozzle is connected to the powder feeder through a pipeline. The supersonic nozzle is composed of a contracting section, a throat part and an expanding section, wherein the contracting section which is in the shape of a Vito Zinski curve is in a smooth and continuous contraction structure, the contracting section is in transitional connection with the throat part, the expanding section which is axisymmetric with the supersonic section is in a bit flow type structure, the expanding section which is in transitional connection with the throat part comprises an initial expansion section and a wave absorbing section, the initial expansion section is in a smooth and continuous transition structure, the wave absorbing section is in an axisymmetric structure and is parallel to an axis, the contracting section is connected with a mixing chamber, and transition pipe fittings arranged on the contracting section are respectively connected to the powder feeder and the heater. The present invention has the advantages of high powder feeding efficiency, long service life and no oxidation problems.
Description
Technical field
The present invention relates to the surperficial spray treatment of material, specifically a kind of cold air driven spray painter.
Background technology
In the prior art, two kinds of technology of the many employings of surperficial spray treatment for material, the one, the traditional type hot-spraying techniques, as: flame plating, electric arc spraying, plasma spraying, hypersonic flame spraying and detonation flame spraying etc., its common feature is to utilize different thermals source, various materials that will spray such as metal, alloy, pottery, plastics and all kinds of matrix material thereof are heated to fusing or molten state, and formations " particulate spray " that atomizes at a high speed is deposited on the coating of combining closely through pretreated working-surface formation heaped-up and matrix by air-flow.Because thermospray needs very high temperature in spraying process,, make the spray material severe oxidation, so limited the use range of thermospray when flame stream touches a large amount of air after leaving nozzle.In order to solve above-mentioned problem of oxidation, the further improvement of hot-spraying techniques is to adopt low-voltage plasma spraying and vacuum plasma spray coating, but in vacuum chamber, limited spraying workpiece size again, and can only could prepare coating, and spraying equipment involves great expense powdered material with stable liquid phase.The 2nd, cold spray technique, cold spraying is invented in the late nineteen eighties by Russian scientist, (wherein: 1) Russ P, the patent No. are respectively 1674585 (1991), 1603581 (1993), 1618778 (1993), 1773072 (1993), 2010619 (1994) for Russia, the U.S. and European Community's patent; 2) European patent, the patent No. are 0484533 A1 (1992); 3) United States Patent (USP), the patent No. is 5302414 (1994)) a kind of cold air driven spray painter disclosed, wherein powder feeder and superonic flow nozzzle are connected as a single entity, as shown in Figure 1, adopt the driven by motor rotary drum, promote powder by rotary drum and enter gas powder mixes chamber, a pressurized gas inlet is arranged in the lower end of powder feeder, and respectively gas is imported powder feeder rotary drum low side and powder top with balance powder feeding chamber pressure by two outlets, its weak point is: may cause the gaseous tension of powder upper end to be lower than the lower end, cause that powder flows backwards.Expansion section is taper on nozzle arrangements in addition, though be convenient to processing, the pressure-losses is big, is difficult for realizing best jet velocity, life-span low (1000 hours).
Summary of the invention
The cold air driven spray painter that the purpose of this invention is to provide a kind of powder feeding efficient height, life-span length, non-oxidation problem.
To achieve these goals, technical scheme of the present invention is: be made up of superonic flow nozzzle, well heater, powder feeder, spray booth, powder recovering device, controller, wherein, superonic flow nozzzle is installed in the spray booth ingress, controller is connected with the air compressor pipeline that has gas-holder, and links to each other with well heater, powder feeder respectively by powder feeding switch, pressure regulating switch, and well heater is with heating power supply, one end is to superonic flow nozzzle, and the spray booth outlet adds powder recovering device; Described superonic flow nozzzle is connected with powder feeder by pipeline, by contraction section, throat, expansion segment three parts are formed, described contraction section is the subsonic speed section, be Vito octyl group curved shape smooth and continuous contraction structure, be connected with the throat transition, described expansion section is a supersonic speed section rotational symmetry bit stream formula structure, be connected with the throat transition, it comprises initial bubble section and wave absorption section, and the initial bubble section is the smooth and continuous transition structure, is the current of spring district therebetween, the wave absorption section is the axially symmetric structure that parallels to the axis, be homogeneity range therebetween, described contraction section links to each other with mixing section, its mixing section by transition fitting mounted thereto respectively with powder feeder, well heater is connected; Described powder feeder is by the dress powder chamber with sealing cover, pressurized air air intake A, B, be installed in the rotary drum of below, dress powder chamber, the powder particle export mixes, described dress powder locular wall is provided with two independently pressurized air air intake A, B, one above dress powder chamber, one below rotary drum, via controller links to each other with gas-holder respectively, again to air compressor, establish a powder particle outlet that is connected with the superonic flow nozzzle pipeline on the dress powder locular wall in addition, groove and the gap between rotary drum and the wall set on the rotary drum constitute pressurized air air intake B to the passage between the powder particle outlet;
Described controller links to each other with described powder feeder, superonic flow nozzzle respectively by the tensimeter on it, links to each other with well heater by the thermopair of temperature controller through being located on the superonic flow nozzzle, is connected with powder feeder by voltmeter again.
The principle of the invention is: utilize pressurized gas to carry powder through heating, by the matrix surface in the nozzle high-speed motion arrival spray booth of supersonic speed design, powder particle high-speed motion bombardment matrix surface, there is about 1/3 kinetic energy to change heat energy into, particle is in effect generation of the following moment viscous deformation of high speed kinetic energy and heat energy, and the surface that makes particle be welded on matrix forms coating; Wherein gas accelerates to 300～1200m/s, drives dusty spray and forms coating with lower temperature (20～550 ℃) high-speed impact matrix; Power gas is quickly heated up to temperature required, and by making powder heating with powder mixes.
The present invention has following advantage:
1. improve automatic powder feeding system, improved powder feeding efficient.The present invention is imported the inlet mouth up and down in the powder feeder respectively by two inlet mouths, can control respectively by pressure regulating switch, make gaseous tension suitable for reading greater than the bottom, thereby guarantee that powder feeding is even, avoided in the prior art (inlet mouth is imported by a gas port up and down) to cause the gaseous tension of powder upper end to be lower than the lower end easily, cause that powder flows backwards, rotary drum is covered dead phenomenon by powder, improved powder feeding efficient, enlarged the powder feeding scope.
2. nozzle long service life, coating quality is good.Superonic flow nozzzle of the present invention adopts hot this base curves in Vito at contraction section, and expansion section (supersonic speed section) then adopts the design of rotational symmetry bit stream, and the shrinkage curve of described smooth and continuous can evenly accelerate to velocity of sound with air-flow, reduces the flowed energy loss; The section of will speed up is divided into initial bubble section and wave absorption section in addition, form supersonic speed radial flow (supersonic speed current of spring) air-flow in the initial bubble section and promptly transit to current of spring completely to current of spring by straight sonic flow, in the wave absorption section this supersonic speed current of spring is transformed into flowing of evenly paralleling to the axis, thereby minimizing resistance to flow, air-flow is quickened to greatest extent, nozzle can be increased to 1500 hours work-ing life, nozzle of the present invention not only in accelerator power loss few, resistance to flow is little, and can obtain bigger gas velocity.Improve coating quality, reduce coating porosity.
3. non-oxidation problem.The difference of the maximum of other heat spraying method is to produce coating in the temperature range more much lower than particles fuse temperature in the present invention and the prior art, makes coated material form coating under the temperature more much lower than its temperature of fusion by superonic flow nozzzle.Because powder Heating temperature lower (20～550 ℃) in the spraying process, in the spraying process particle can not produce overheated, also just there are not the problems such as particle high-temperature oxidation, evaporation, fusing, crystallization and gas release that produce in other thermal spray process, improved the quality of coating significantly.
4. applied range.Adopt the present invention not only to be suitable for metal, alloy material spraying, can be suitable for the spraying of reactive metal and thermoplasticity organic resin simultaneously, its base material can be various metals and electrical insulator (such as glass, pottery etc.).
The present invention have also that noise is low, energy consumption is little, non-thermal radiation, powder reusable edible, characteristics such as simple to operate, safety and cost are low.
Description of drawings
Fig. 1 is a powder feeder structural representation in the prior art.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is a powder feeder structure enlarged view among Fig. 2.
Fig. 4 is Fig. 2 moderate supersonic speed nozzle arrangements enlarged view.
Embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Shown in Fig. 2,3,4, form by superonic flow nozzzle 6, well heater 7, powder feeder 3, spray booth 4, powder recovering device 5, controller 2, wherein, superonic flow nozzzle 6 is installed in spray booth 4 ingress, controller 2 is connected with air compressor 1 pipeline that has gas-holder 11, and links to each other with well heater 7, powder feeder 3 respectively by powder feeding switch 22, pressure regulating switch 21, and well heater 7 is with heating power supply 71, one end is to superonic flow nozzzle 6, and spray booth 4 outlets add powder recovering device 5;
Described superonic flow nozzzle 6 is connected with powder feeder 3 by pipeline, by contraction section 61, throat 62, expansion segment 63 3 parts are formed, described contraction section 61 is the subsonic speed section, be Vito octyl group curved shape smooth and continuous contraction structure, be connected with throat 62 transition, described expansion section 63 is a supersonic speed section rotational symmetry bit stream formula structure, be connected with throat 62 transition, it comprises initial bubble section 631 and wave absorption section 632, initial bubble section 631 is the smooth and continuous transition structure, be the current of spring district therebetween, the axially symmetric structure of wave absorption section 632 for paralleling to the axis, be homogeneity range therebetween, described contraction section 61 links to each other with mixing section 64, its mixing section 64 by transition fitting mounted thereto respectively with powder feeder 3, well heater 7 is connected;
Described powder feeder 3 is by the dress powder chamber 31 with sealing cover 32, pressurized air air intake A33, B33 ', be installed in the rotary drum 34 of dress 31 belows, powder chamber, powder particle outlet 35 constitutes, described dress powder chamber 31 walls are provided with two independently pressurized air air intake A33, B33 ', one above dress powder chamber 31, one below rotary drum 34, via controller 2 links to each other with gas-holder 11 respectively, again to air compressor 1, establish a powder particle outlet 35 that is connected with the superonic flow nozzzle pipeline on 31 walls of dress powder chamber in addition, groove and the gap between rotary drum 34 and the wall set on the rotary drum 34 constitute pressurized air air intake B33 ' to the passage between the powder particle outlet 35;
Described controller 2 links to each other with described powder feeder 3, superonic flow nozzzle 6 respectively by the tensimeter 25 on it, links to each other with well heater 7 by the thermopair of temperature controller 24 through being located on the superonic flow nozzzle 6, is connected with powder feeder 3 by voltmeter 23 again.
Working process of the present invention is as follows:
The present invention is a propulsion source with pressurized air and electricity, by controller 2 controls, the well heater 2 of adjustments of gas temperature and the powder feeder 3 of supplying powder when being used to spray when pressurized gas being sent to be used to spray by pipeline, the heated gas-entrained of powder enters superonic flow nozzzle 6, superonic flow nozzzle 6 is realized quickening to powder particle in the spraying process, arrive matrix surface by high-speed motion, powder particle high-speed motion bombardment matrix surface, in spray booth 4, base material is carried out coating, there is about 1/3 kinetic energy to change heat energy into, particle is in effect generation of the following moment viscous deformation of high speed kinetic energy and heat energy, the surface that makes particle be welded on matrix forms coating, unnecessary powder is recycled by powder recovering device 5, and the enforcement of above cold air power spraying and coating process is to be finished by controller 2 controls.
Operating procedure parameter area of the present invention: gaseous tension 1.2～3.0MPa, 20～580 ℃ of gas temperatures, gas flow 10～30g/s, current consumption 2～12KW, powder size from 50nm to 60 μ m.
The principle of design of superonic flow nozzzle of the present invention is provided by the hydromeehanics formula, and one-dimensional steady is flowed, and considers compressible fluid, then has:
v
2/ 2+K/K-1P/ ρ=normal (1)
ρ vS=normal (2)
P/ ρ
k=normal (3)
By top three formula, can try to achieve:
ds/s＝(M
2-1)dv/v (4)
In the formula: the S pipeline section is long-pending; M=v/v
Sound(Mach number); The ρ gas density; The K gas law constant; The P gaseous tension; The v gas flow rate.By formula (4) as can be known, as v＞v
Sound, then the dv symbol is identical with the ds symbol.That is: become big (ds on the occasion of), fluid velocity increase with pipeline section is long-pending.As v＜v
SoundThen dv symbol and ds opposite in sign that is: diminish (ds is a negative value) with pipeline section is long-pending, and fluid velocity also increases.Therefore, through enough shrinking, fluid velocity can reach the velocity of sound at place, pipeline throat section, through behind this cross section, will obtain supersonic speed.
On poly tetrafluoro ethylene matrix, to prepare zinc-copper compound coating, for large-scale electronic component (as electrical condenser) is provided by the approach that provides.Its coating preparation specifically comprises three technological process embodiment:
(1) matrix pre-treatment: cleaning-macroscopical alligatoring-sandblast.
(2) spraying coating process: adopt cold air power spraying and coating method, selecting zinc is about coating underlayer thickness 0.3mm, then surface spray red copper thickness 2～3mm;
Spray zinc technology: spray distance 10～20mm, gaseous tension 1.6～1.8MPa, 200～220 ℃ of gas temperatures, gas flow 10～30g/s, powder size 30～50 μ m;
Spray process for copper: spray distance 10～20mm, gaseous tension 1.6～1.8MPa, 250～280 ℃ of gas temperatures, gas flow 10～30g/s, powder size 30～50 μ m.
(3) coating aftertreatment: adopt mechanical grinding, polishing.
Adopt the performance of coating of the present invention: the tensile strength 68MPa of coating and matrix, shearing resistance 35MPa, oxygen level 0.3～0.5%, resistance 0.05～0.08 Ω, withstand voltage 45kV, coating porosity spelter coating are 3～5%, the red copper coating is 1～3%, sedimentation effect 75%.
Relevant comparative example
Adopt the coating performance of Russian cold spray-coating method preparation as follows: the tensile strength 65MPa of coating and matrix, shearing resistance 35MPa, oxygen level 0.3～0.5%, resistance 0.05～0.08 Ω, withstand voltage 45kV, coating porosity spelter coating are 3～6%, the red copper coating is 2～3%, sedimentation effect 65%.
The gas that the present invention uses can be high pressure gas bodies such as air, nitrogen, helium or mixed gas.The material that can spray is metal and alloy thereof, thermoplasticity organic resin, and base material can be various metals and electrical insulator (such as glass, pottery etc.).The bonding force of coating and matrix reaches 30～80MPa, voidage 1～8%, coat-thickness 1-10
5μ m, sedimentation effect 55～80%.
Claims (2)
1. cold air driven spray painter, by superonic flow nozzzle (6), well heater (7), powder feeder (3), spray booth (4), powder recovering device (5), controller (2) is formed, wherein, superonic flow nozzzle (6) is installed in spray booth (4) ingress, controller (2) is connected with the air compressor that has gas-holder (1 1) (1) pipeline, and by powder feeding switch (22), pressure regulating switch (21) respectively with well heater (7), powder feeder (3) links to each other, well heater (7) is with heating power supply (71), one end is to superonic flow nozzzle (6), and spray booth (4) outlet adds powder recovering device (5); It is characterized in that: described superonic flow nozzzle (6) is connected with powder feeder (3) by pipeline, by contraction section (61), throat (62), expansion segment (63) three parts are formed, described contraction section (61) is the subsonic speed section, be Vito octyl group curved shape smooth and continuous contraction structure, be connected with throat (62) transition, described expansion section (63) is a supersonic speed section rotational symmetry bit stream formula structure, be connected with throat (62) transition, it comprises initial bubble section (631) and wave absorption section (632), initial bubble section (631) is the smooth and continuous transition structure, be the current of spring district therebetween, the axially symmetric structure of wave absorption section (632) for paralleling to the axis, be homogeneity range therebetween, described contraction section (61) links to each other with mixing section (64), its mixing section (64) by transition fitting mounted thereto respectively with powder feeder (3), well heater (7) is connected; Described powder feeder (3) is by the dress powder chamber (31) with sealing cover (32), pressurized air air intake A, B (33,33 '), be installed in the rotary drum (34) of below, dress powder chamber (31), powder particle outlet (35) constitutes, described dress powder chamber (31) wall is provided with two independently pressurized air air intake A, B (33,33 '), one in top, dress powder chamber (31), one in rotary drum (34) below, via controller (2) links to each other with gas-holder (11) respectively, again to air compressor (1), establish a powder particle outlet (35) that is connected with superonic flow nozzzle (6) pipeline on the wall of dress powder chamber (3 1) in addition, set groove gone up by rotary drum (34) and the gap between rotary drum (34) and the wall constitutes pressurized air air intake B (33 ') to the passage between the powder particle outlet (35).
2. according to the described cold air driven spray painter of claim 1, it is characterized in that: described controller (2) links to each other with described powder feeder (3), superonic flow nozzzle (6) respectively by the tensimeter (25) on it, link to each other with well heater (7) by the thermopair of temperature controller (24), be connected with powder feeder (3) by voltmeter (23) again through being located on the superonic flow nozzzle (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011281308A CN1161188C (en) | 2001-09-05 | 2001-09-05 | Cold air driven spray painter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011281308A CN1161188C (en) | 2001-09-05 | 2001-09-05 | Cold air driven spray painter |
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| Publication Number | Publication Date |
|---|---|
| CN1403210A CN1403210A (en) | 2003-03-19 |
| CN1161188C true CN1161188C (en) | 2004-08-11 |
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| CNB011281308A Expired - Fee Related CN1161188C (en) | 2001-09-05 | 2001-09-05 | Cold air driven spray painter |
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2001
- 2001-09-05 CN CNB011281308A patent/CN1161188C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391617C (en) * | 2005-09-29 | 2008-06-04 | 宝山钢铁股份有限公司 | Composite ceramic Raoult nozzle for cold spray coating |
| CN100446870C (en) * | 2005-10-31 | 2008-12-31 | 宝山钢铁股份有限公司 | Cold air dynamical spray-painting method and apparatus of delivering powder through down stream |
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| Publication number | Publication date |
|---|---|
| CN1403210A (en) | 2003-03-19 |
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