CN210357638U - Cold spray gun for spraying silver layer - Google Patents
Cold spray gun for spraying silver layer Download PDFInfo
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- CN210357638U CN210357638U CN201921001370.1U CN201921001370U CN210357638U CN 210357638 U CN210357638 U CN 210357638U CN 201921001370 U CN201921001370 U CN 201921001370U CN 210357638 U CN210357638 U CN 210357638U
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Abstract
The utility model relates to a cold spray gun for spraying silver layer, can include air chamber subassembly, intake pipe, send powder core subassembly and cold spray pipe subassembly, the air chamber subassembly can include awl cylindric air chamber casing, air chamber cap, go up air chamber baffle and lower air chamber baffle, the air chamber casing has upper shed and under shed, the air chamber cap is sealed to be installed at the upper shed, go up air chamber baffle and lower air chamber baffle fixed mounting in the air chamber casing, divide into the air chamber into triplex; the upper air chamber partition plate and the lower air chamber partition plate are provided with at least one circle of air holes, and the sum of the sectional areas of the air holes of the upper air chamber partition plate is larger than that of the air holes of the lower air chamber partition plate; the inner wall of the conical lower part below the lower air chamber partition plate is provided with a plurality of rifling lines, the number of the rifling lines is consistent with that of a circle of air holes of the lower air chamber partition plate, the outlet of the circle of air holes is aligned with the upper end of the rifling lines, and the lower end of the rifling lines is close to the lower opening. The upper and lower air chamber clapboards with different air-through sectional areas are arranged, so that the pressure fluctuation of the air chamber can be avoided, and the coating quality is improved.
Description
Technical Field
The utility model relates to a cold spraying equipment specifically relates to a cold spray gun for spraying silver layer.
Background
Cold spraying is a new and advanced surface coating technique developed from thermal spraying. The cold spraying is based on the aerodynamic and high-speed collision dynamics principle, firstly, high-pressure gas is introduced into a contraction-expansion Laval nozzle, supersonic flow is generated after the gas flows through the throat part of the nozzle, then powder conveying gas is used for conveying spraying powder into airflow from the upstream of the nozzle along the axial direction, powder particles are accelerated to the high speed of more than 300-1200 m/s through the whole nozzle to form high-speed particle flow, and the high-speed particle flow collides with a substrate to generate severe plastic deformation so as to deposit and form a coating. In the process, the working gas is usually preheated, and the temperature is generally 100-800 ℃ according to different spraying materials, but is far lower than the melting point of the spraying materials. Because the spraying process adopts relatively low temperature, adverse effects such as oxidation (aiming at metal materials), phase change, decomposition, chemical reaction, grain growth (aiming at nano-structure materials) and the like in the thermal spraying process can be avoided. At present, cold spray techniques have been successfully used to prepare most pure metals, alloys, metal matrix composites, nanostructured metal coatings or blocks, and the like.
The existing cold spray gun for spraying silver layer adopts the form of pure conical cylinder-shaped air chamber component. Because the sectional area of the gas-powder mixing pipe at the rear end of the gas chamber is fixed, the gas supply pressure of the gas chamber structure is easy to fluctuate due to fluctuation of the powder supply quantity, and the system needs to correspondingly adjust when monitoring the large fluctuation. However, a certain time is required from monitoring-system calculation-valve execution-to gas chamber-gas chamber feedback, and the gas flow can continuously fluctuate in the time. The flow and pressure adjusted by the time lag cannot meet the actual fluctuation amount, and the phenomenon of overshoot or undershoot occurs, so that the system is continuously adjusted to oscillate. The method has the advantages that the service life of system components is greatly influenced, the coating quality is seriously influenced, the binding force of the coating is high and low, the porosity is different, the powdering rate is different, and the surface of the coating is uneven. And the silver powder is softer, and higher spraying speed is needed, so that the pressure resistance grade of related equipment needs to be improved, and the manufacturing cost of the equipment is greatly increased. In addition, the cold spraying temperature is high, so that the requirement on the material of a Laval nozzle in a cold spray gun is high, the production cost is high, a sealing ring in the cold spray gun is easy to damage, the service life is short, the continuity of the spraying action is influenced, and the material waste is caused.
Disclosure of Invention
The utility model aims at providing a cold spray gun of spraying silver layer to solve above-mentioned technical problem. Therefore, the utility model discloses a specific technical scheme as follows:
a cold spray gun for spraying a silver layer can comprise an air chamber assembly, an air inlet pipe, a powder feeding core assembly and a cold spray pipe assembly, wherein the air chamber assembly comprises a conical air chamber shell, an air chamber cover, an upper air chamber partition plate and a lower air chamber partition plate, the air chamber shell comprises a cylindrical upper part and a conical lower part and is provided with an upper opening and a lower opening; the air chamber cover is hermetically arranged at the upper opening, and the upper air chamber partition plate and the lower air chamber partition plate are fixedly arranged in the air chamber shell and divide the air chamber into three parts, wherein the upper air chamber partition plate is positioned at the junction of the cylindrical upper part and the conical lower part, and the lower air chamber partition plate is positioned in the conical lower part; the upper air chamber partition plate and the lower air chamber partition plate are provided with at least one circle of air holes, and the sum of the sectional areas of the air holes of the upper air chamber partition plate is larger than that of the air holes of the lower air chamber partition plate; a plurality of rifling lines are arranged on the inner wall of the conical lower part below the lower air chamber partition plate, the number of the rifling lines is consistent with that of a circle of air holes of the lower air chamber partition plate, the outlet of the circle of air holes is aligned with the upper end of the rifling lines, and the lower end of the rifling lines is close to the lower opening; the air inlet pipe penetrates through the air chamber cover and enters the air chamber part above the upper air chamber partition plate; the powder feeding core assembly penetrates through central through holes of the air chamber cover, the upper air chamber partition plate and the lower air chamber partition plate until the powder feeding core assembly is close to the lower opening; the cold spray pipe assembly is fixedly mounted on the lower opening.
Further, the side surface of the lower air chamber partition plate has the same taper as the inner wall of the conical lower part.
Furthermore, the lower air chamber partition plate is provided with two circles of air holes, wherein the inner circle of air holes are inclined holes, the outer circle of air holes are straight holes, the outlets of the outer circle of air holes are aligned to the upper ends of the rifling lines, and the outlets of the inner circle of air holes are aligned to the lower ends of the rifling lines.
Further, the middle of the bottom of the lower air chamber partition plate is provided with a circular arc flange extending downwards, and an outlet of the inner ring air hole is positioned on the circular arc flange.
Furthermore, a positioning protrusion is arranged on the side face of the lower air chamber partition plate, one of the rifling lines is provided with an upper end extending part, and the positioning protrusion is matched with the upper end extending part for positioning.
Furthermore, the air chamber assembly also comprises an air chamber inner sleeve and a plurality of top columns, and the upper air chamber partition plate and the lower air chamber partition plate are fixedly arranged in the air chamber shell through the air chamber inner sleeve and the plurality of top columns; the upper end of the air chamber inner sleeve is abutted against the air chamber cover, and the lower end of the air chamber inner sleeve is abutted against the upper air chamber partition plate; the upper end of the top column supports the upper air chamber partition plate, and the lower end of the top column is fixed on the lower air chamber partition plate.
Further, the top pillar has an upper end with a smaller diameter, the upper air chamber partition plate has a through hole, and the upper air chamber partition plate is sleeved on the upper end through the through hole and supported by the top pillar; the lower end of the top column is fixedly connected with the lower air chamber partition plate through threads.
Further, the air chamber cover is further provided with a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are respectively used for measuring the temperature and the pressure in the air chamber part above the upper air chamber partition plate.
Furthermore, send powder core subassembly to establish including sending powder core and cover send the powder core sleeve pipe on the powder core, send the powder core sleeve pipe to be equipped with the cooling water sleeve on corresponding to the entrance point position of sending the powder core, be equipped with radial opposition's water inlet and delivery port on the lateral wall of cooling water sleeve, the water inlet is used for connecting cooling water source.
Further, cold spray pipe subassembly includes shower nozzle tube socket, interior spray tube, well sleeve pipe and outer tube, the shower nozzle tube socket has inhalant canal and exhalant canal, interior spray tube with form cooling inhalant canal between the well sleeve pipe, well sleeve pipe with form cooling return water passageway between the outer tube, inhalant canal one end with cooling water sleeve's delivery port intercommunication, the other end with cooling inhalant canal intercommunication, cooling return water passageway lower extreme with cooling inhalant canal intercommunication, the upper end with exhalant canal intercommunication.
Further, the inner spray pipe comprises an upper inner spray pipe section and a lower inner spray pipe section which are butted together, the inner diameter of the upper inner spray pipe section is gradually reduced from top to bottom, and the inner diameter of the lower inner spray pipe section is gradually increased from top to bottom.
Further, the inner nozzle is made of high temperature plastic such as polyimide or stainless steel.
The utility model adopts the above technical scheme, the beneficial effect who has is: the utility model discloses a set up the upper and lower two-layer air chamber baffle of different sectional areas of ventilating, can avoid the air chamber pressure fluctuation, play the steady voltage effect, improve the coating quality. Through setting up the rifling for gaseous spiral that produces accelerates, and then makes the silver powder can spray to treating on the spraying surface with higher speed, can realize the spraying of silver powder under the circumstances that need not to improve the withstand voltage grade of equipment. In addition, by providing a cooling system, the laval nozzle can be made from a less expensive and easier to machine material, thereby reducing the cost of the cold spray gun.
Drawings
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
Fig. 1 is a perspective view of a cold spray gun according to an embodiment of the present invention;
FIG. 2 is another perspective view of the cold spray gun shown in FIG. 1 with a portion of the outer shell removed to show internal structure;
FIG. 3 is a front view of the cold spray gun shown in FIG. 2;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
fig. 5 is an enlarged view at B of fig. 4;
FIG. 6 is an exploded perspective view of the plenum assembly of the cold spray gun shown in FIG. 2;
FIG. 7 is a cross-sectional view of the plenum assembly shown in FIG. 6;
FIG. 8 is a perspective view of the plenum housing of the plenum assembly shown in FIG. 6.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1 to 8, a cold spray gun 100 for spraying a silver layer is described, and the cold spray gun 100 may include a gas chamber assembly 1, a gas inlet pipe 2, a powder feeding core assembly 3, and a cold spray pipe assembly 4. The plenum assembly 1 may include a conical cylindrical plenum housing 11, a plenum cover 12, a plenum inner 13, a number of top posts 14 (three shown), upper plenum partitions 15, and lower plenum partitions 16. The air chamber housing 11 is integrally formed and includes a cylindrical upper portion 111 and a conical lower portion 112. The gas chamber housing 11 has an upper opening 113 and a lower opening 114. The inner wall of the upper opening 113 has an internal thread and the outer wall of the lower opening 114 has an external thread. The chamber lid 12 is hermetically installed at the upper opening 113 of the chamber housing 11. An upper air chamber partition 15 and a lower air chamber partition 16 are fixedly installed in the air chamber housing 11 to divide the air chamber into three parts. A plurality of rifling grooves 1121 are arranged on the inner wall of the conical lower part 112 below the lower air chamber partition 15, the number of the rifling grooves 1121 is consistent with that of a circle of air holes of the lower air chamber partition 15, the outlet of the circle of air holes is aligned with the upper end of the rifling grooves 1121, and the lower ends of the rifling grooves 1121 are close to the lower opening 114. Through setting up rifling 121 for gaseous spiral of production is accelerated, and then makes the silver powder can spray to treating on the spraying surface with higher speed, can realize the spraying of silver powder under the circumstances that need not to improve the withstand voltage grade of equipment. And, can form the gas wall during gaseous spiral, block the powder diffusion, make the silver powder that jets out from cold spray pipe subassembly 4 more concentrated, and then improve the closely knit degree of coating (promptly, reduce the porosity), increase the bonding strength of coating, improve the silver powder powdering rate.
The inlet pipe 2 passes through the chamber cover 12 into the portion of the chamber above the upper chamber partition 15. The powder feeding core assembly 3 passes through the central through holes of the chamber cover 12, the upper chamber partition 15 and the lower chamber partition 16 until it is close to the lower opening 114 to feed the silver powder to the lower opening 114. The cold jet assembly 4 is fixedly mounted to the lower opening 114. Therefore, the silver powder gas flow forms a high-speed particle flow through the cold spray pipe assembly 4, and collides with the surface to be sprayed to cause severe plastic deformation to deposit and form a silver coating. The specific structure of the chamber lid 12, upper chamber baffle 15, lower chamber baffle 16, powder feed core assembly 3 and cold spray tube assembly 4 is described below.
As shown in fig. 6 and 7, the gas chamber lid 12 includes an upper flange portion 121, an intermediate threaded connection portion 122, and a lower extension portion 123, which have gradually decreasing outer diameters. The chamber lid 12 is fixedly mounted to the upper opening 113 by the external thread of the intermediate threaded portion 122 being threadedly engaged with the internal thread of the upper opening 113. The end of the lower extension 123 passes through the upper plenum partition 15. The air chamber cover 12 is provided with a central through hole 124, an air pipe through hole 125, a temperature sensor through hole 126 and a pressure sensor through hole 127. Wherein the powder feeding core assembly 3 is inserted into the air cell assembly from the central through hole 124 with its end near the lower opening 114. The air pipe through hole 125, the temperature sensor through hole 126 and the pressure sensor through hole 127 are located beside the central through hole 124, and are respectively used for the air inlet pipe 2, the temperature sensor 5 and the pressure sensor 6 to pass through (see fig. 2). The gas inlet tube 2 may have a spiral coil heating section 21 (see fig. 4) for heating the powder feeding gas. The powder feeding gas is usually an inert gas such as nitrogen gas. The temperature sensor 5 and the pressure sensor 6 are used to measure the temperature and the pressure, respectively, in the gas chamber (specifically, in the portion of the gas chamber above the upper chamber partition 16).
With continued reference to fig. 6 and 7, the upper and lower plenum partitions 15 and 16 are fixedly mounted within the plenum housing 11 by the plenum inner 13 and the top post 14. Wherein the upper plenum partition 15 is located at the intersection of the cylindrical upper section 111 and the conical lower section 112 and the lower plenum partition 16 is located in the conical lower section 112 (approximately mid-way). The upper end of the air chamber inner sleeve 13 abuts against the air chamber cover 1 (specifically, the middle threaded connection part 122), and the lower end abuts against the upper air chamber partition 15; the upper end of the top pillar 14 supports an upper air chamber partition 15, and the lower end is fixed to a lower air chamber partition 16. The fixing structure is simple, and the installation and the disassembly are very convenient. Of course, the upper and lower chamber partitions 15 and 16 may be mounted in the chamber housing 11 using other fixing structures.
In the illustrated embodiment, the sides of the lower plenum partition 16 are tapered the same as the inner wall of the conical lower portion 112 so that the lower plenum partition 16 can fit snugly against the inner wall of the conical lower portion 112. This configuration of the lower plenum partition 16 facilitates installation.
As shown in fig. 6 and 7, the top post 14 has a smaller diameter upper end 141 and an externally threaded lower end 142. The upper plenum partition 15 has a through hole 152, and the upper plenum partition 15 is supported by the top pillar 14 by fitting over the upper end 141 through the through hole 152. The lower end 142 of the top post 14 is fixedly connected to the threaded hole 162 of the lower plenum partition 16 by threads. This mounting arrangement of the top pillar 14 to the upper and lower air chamber partitions 15 and 16 facilitates installation and removal.
The upper and lower chamber partitions 15, 16 each have at least one turn of air holes 151, 161 (two turns are shown in fig. 6) and the sum of the cross-sectional areas of the air holes of the upper chamber partition 15 is greater than the sum of the cross-sectional areas of the air holes of the lower chamber partition 16. When the powder feeding amount fluctuates, the generated air pressure fluctuation realizes air pressure buffering through air holes with different sectional areas between the upper and lower double-layer air chamber partition plates, so that the pressure fluctuation caused by the powder feeding flow fluctuation has little influence on the pressure of the air chamber at the uppermost layer, and the pressure stabilizing effect is achieved. Namely, the upper air chamber is equivalent to a 'pressure stabilizing air storage tank', and after the pressure of the lower air chamber is reduced, the upper air chamber supplements the pressure in time to achieve the effect of automatic and rapid balance, so that the powder feeding pressure can be basically maintained unchanged.
In this embodiment, the upper air chamber partition 15 has two circles of air holes 151, and the air holes 151 are all straight holes; also, the number (6) of inner ring air holes 151 is smaller than the number (15) of outer ring air holes 151. It should be understood that the number of inner and outer ring air holes 151 and 151 may be the same.
In this embodiment, the lower plenum partition 16 has two circles of air holes 161, where the inner circles of air holes are inclined holes, the outer circles of air holes are straight holes, and the outlets of the outer circles of air holes are aligned with the upper ends of the rifling 121 and the outlets of the inner circles of air holes are aligned with the lower ends of the rifling 121. The arrangement mode of the air holes 161 is beneficial to spiral acceleration of air to achieve higher spraying speed, and is beneficial to improving the concentration ratio of sprayed powder to enable the porosity of the coating to be lower.
As shown in fig. 7, the lower chamber partition 16 of the present embodiment has a circular arc flange 163 extending downward at the center of the bottom thereof, and the outlet of the inner-ring air hole is located on the circular arc flange 163. The rounded flange 163 can bring the outlet of the inner ring air holes 161 closer to the rifling 1121 while ensuring sufficient air space below the lower air chamber partition 16, further improving the concentration of the injected powder.
With continued reference to fig. 6 and 8, a locating projection 164 is provided on the side of the lower plenum partition 16, one of the rifling 1121 has an upper end extension 1121a, and the locating projection 164 is positioned in cooperation with the upper end extension 1121 a. This ensures that air holes 161 of lower plenum partition 16 are aligned with rifling 1121.
In one embodiment, the depth of rifling 1121 is 0.5 millimeters.
In this embodiment, the number of air holes 161 per turn of lower air chamber baffle 16 is 21, and correspondingly the number of rifling 1121 is 21. It should be understood that the number of rifling 121 of the air holes 161 is not limited to the illustrated embodiment, which is related to the size of the air chamber and the lower air chamber partition 16.
In one embodiment, the number of air holes 151 of the upper plenum partition 15 totals 21 and has a diameter of 1.8 millimeters. The number of the inner air holes 161 and the outer air holes 161 of the lower air chamber partition 16 is 21, wherein the diameter of the inner air holes 161 is 1 mm, and the diameter of the outer air holes 161 is 1.3 mm.
As shown in fig. 2-5, the cold spray gun of the present invention further includes a cooling system for cooling the powder feeding core assembly 3 and the cold spray pipe assembly 4, which will be described separately below. The powder feeding core assembly 3 may comprise a powder feeding core 31 and a powder feeding core sleeve 32 sleeved on the powder feeding core 31. The powder feeding core sleeve 32 is provided with a cooling water sleeve 33 at the inlet end position corresponding to the powder feeding core 31 to cool the powder feeding core 31, so that the phenomenon that the silver powder is adhered to the powder feeding core 31 due to the overhigh temperature of the powder feeding core sleeve, the powder feeding amount is influenced, and even the powder feeding core 31 is blocked is avoided. The cooling water jacket 33 is provided with diametrically opposed water inlets and outlets in the side wall for connection to a source of cooling water (not shown), for example via a water inlet tube 34. The conductivity of the cooling water is required to be below 20 mu S/cm, so that the cooling water needs to be replaced by new cooling water if the conductivity of the cooling water is more than 20 mu S/cm during the use process. The cooling water can be pure water or deionized water with the conductivity of less than 6 mu S/cm, and the like.
The inner nozzle 42 is a laval nozzle and may include an upper inner nozzle segment 421 and a lower inner nozzle segment 422 that are butted together, wherein the inner diameter of the upper inner nozzle segment 421 gradually decreases from top to bottom and the inner diameter of the lower inner nozzle segment 422 gradually increases from top to bottom.
In this case, the inner nozzle 42 may be made of a low-cost material such as high-temperature plastic such as polyimide, or stainless steel.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The cold spray gun for spraying the silver layer is characterized by comprising an air chamber assembly, an air inlet pipe, a powder feeding core assembly and a cold spray pipe assembly, wherein the air chamber assembly comprises a conical cylindrical air chamber shell, an air chamber cover, an upper air chamber partition plate and a lower air chamber partition plate; the air chamber cover is hermetically arranged at the upper opening, and the upper air chamber partition plate and the lower air chamber partition plate are fixedly arranged in the air chamber shell and divide the air chamber into three parts, wherein the upper air chamber partition plate is positioned at the junction of the cylindrical upper part and the conical lower part, and the lower air chamber partition plate is positioned in the conical lower part; the upper air chamber partition plate and the lower air chamber partition plate are provided with at least one circle of air holes, and the sum of the sectional areas of the air holes of the upper air chamber partition plate is larger than that of the air holes of the lower air chamber partition plate; a plurality of rifling lines are arranged on the inner wall of the conical lower part below the lower air chamber partition plate, the number of the rifling lines is consistent with that of a circle of air holes of the lower air chamber partition plate, the outlet of the circle of air holes is aligned with the upper end of the rifling lines, and the lower end of the rifling lines is close to the lower opening; the air inlet pipe penetrates through the air chamber cover and enters the air chamber part above the upper air chamber partition plate; the powder feeding core assembly penetrates through central through holes of the air chamber cover, the upper air chamber partition plate and the lower air chamber partition plate until the powder feeding core assembly is close to the lower opening; the cold spray pipe assembly is fixedly mounted on the lower opening.
2. The cold spray gun of claim 1 wherein said lower plenum partition is tapered on the same side as the inner wall of said conical lower portion.
3. The cold spray gun of claim 1 wherein said lower chamber partition has two circles of air holes, wherein the inner circle of air holes are inclined holes, the outer circle of air holes are straight holes, the outlet of the outer circle of air holes is aligned with the upper end of said rifling, and the outlet of the inner circle of air holes is aligned with the lower end of said rifling.
4. The cold spray gun of claim 3 wherein said lower plenum partition has a downwardly extending radiused flange at the bottom center thereof, and wherein the outlets of the inner ring air holes are located on said radiused flange.
5. The cold spray gun of claim 4 wherein said lower air chamber partition is provided with a locating projection on a side thereof, one of said rifling having an upper end extension, said locating projection being co-located with said upper end extension.
6. The cold spray gun of claim 1 wherein said plenum assembly further comprises a plenum inner sleeve and a plurality of top posts, said upper and lower plenum partitions being fixedly mounted within said plenum housing by said plenum inner sleeve and said plurality of top posts; the upper end of the air chamber inner sleeve is abutted against the air chamber cover, and the lower end of the air chamber inner sleeve is abutted against the upper air chamber partition plate; the upper end of the top column supports the upper air chamber partition plate, and the lower end of the top column is fixed on the lower air chamber partition plate.
7. The cold spray gun of claim 6 wherein said top post has a smaller diameter upper end, said upper plenum partition having a through hole, said upper plenum partition being supported by said top post by said through hole being sleeved over said upper end; the lower end of the top column is fixedly connected with the lower air chamber partition plate through threads.
8. The cold spray gun of claim 1 wherein said powder feeding core assembly comprises a powder feeding core and a powder feeding core sleeve sleeved on said powder feeding core, said powder feeding core sleeve is provided with a cooling water sleeve at a position corresponding to an inlet end of said powder feeding core, a side wall of said cooling water sleeve is provided with a water inlet and a water outlet which are diametrically opposite, and said water inlet is used for connecting a cooling water source.
9. The cold spray gun of claim 8 wherein said cold spray tube assembly comprises a nozzle tube base, an inner nozzle, a middle sleeve and an outer sleeve, said nozzle tube base having a water inlet channel and a water outlet channel, a cooling water inlet channel formed between said inner nozzle and said middle sleeve, a cooling water return channel formed between said middle sleeve and said outer sleeve, said water inlet channel having one end in communication with said cooling water outlet of said cooling water sleeve and the other end in communication with said cooling water inlet channel, said cooling water return channel having a lower end in communication with said cooling water inlet channel and an upper end in communication with said water outlet channel.
10. The cold spray gun of claim 9 wherein said inner lance includes upper and lower inner lance sections butted together, said upper inner lance section having an inside diameter that gradually decreases from top to bottom and said lower inner lance section having an inside diameter that gradually increases from top to bottom.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921001370.1U CN210357638U (en) | 2019-06-28 | 2019-06-28 | Cold spray gun for spraying silver layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921001370.1U CN210357638U (en) | 2019-06-28 | 2019-06-28 | Cold spray gun for spraying silver layer |
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| CN210357638U true CN210357638U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471987A (en) * | 2022-03-02 | 2022-05-13 | 季华实验室 | Cold spraying spray gun |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471987A (en) * | 2022-03-02 | 2022-05-13 | 季华实验室 | Cold spraying spray gun |
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