Silver coated copper powder preparation device

Abstract

The invention discloses a silver-coated copper powder preparation device which comprises a device body, a powder feeding mechanism, an air supply mechanism and a cyclone separator, the device body comprises an evaporation chamber and a coating chamber, a feeding pipe is arranged at the top of the evaporation chamber, laser heating devices are arranged on the two sides of the feeding pipe, and the laser heating devices heat silver powder to form silver steam; laser of the laser heating device intersects with the axis extension line of the feeding pipe at one point in the evaporation chamber, copper powder in the coating chamber makes contact with silver steam to form silver-coated copper powder particles, a mixing cavity is formed in the end, close to the evaporation chamber, of the coating chamber, and the cross section area of the mixing cavity is decreased along with increasing of the distance from the evaporation chamber. The powder feeding mechanism is connected with the device body and used for blowing copper powder into silver steam, the air supply mechanism comprises a plurality of air supply nozzles located on the inner wall of the coating chamber and used for forming rising spiral airflow, and the cyclone separator is located below the device body. The silver-coated copper powder preparation device provided by the invention has the advantages of high silver-coated copper powder preparation efficiency and good product uniformity.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder coating, in particular to a device for preparing silver-coated copper powder. Background Art

[0002] In the related art, chemical methods are mostly used to prepare silver-coated copper powder, which produces a lot of waste liquid, poor silver bonding effect on the copper powder surface, and uneven products. The stirring of the chemical reactor often causes particle breakage, low quality, and uneven coating. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a silver-coated copper powder preparation device, which has the advantages of high silver-coated copper powder preparation efficiency and good product uniformity.

[0004] According to an embodiment of the present invention, a silver-coated copper powder preparation device comprises a device body, a powder feeding mechanism, an air supply mechanism and a cyclone separator, wherein the device body comprises an evaporation chamber and a coating chamber, a feeding pipe is arranged on the top of the evaporation chamber, laser heating devices are arranged on both sides of the feeding pipe, the laser heating device heats the silver powder to form silver vapor, the laser of the laser heating device intersects with the extended axis line of the feeding pipe at a point in the evaporation chamber, the copper powder and the silver vapor are in contact with each other in the coating chamber to form silver-coated copper powder particles, the coating chamber has a mixing chamber at one end adjacent to the evaporation chamber, the cross-sectional area of ​​the mixing chamber decreases with increasing distance from the evaporation chamber, the powder feeding mechanism is connected to the device body to blow the copper powder into the silver vapor, the air supply mechanism comprises a plurality of air supply nozzles located on the inner wall of the coating chamber to form an ascending spiral airflow, the spiral airflow is used to prolong the mixing time of the copper powder and the silver vapor, and the cyclone separator is located below the device body to separate unqualified silver-coated copper powder particles.

[0005] The silver-coated copper powder preparation device according to the embodiment of the present invention has the advantages of high silver-coated copper powder preparation efficiency and good product uniformity.

[0006] In some embodiments, the powder feeding mechanism includes a powder feeding pipe and an air feeding pipe, the air feeding pipe is perpendicular to the powder feeding pipe and connected to the powder feeding pipe, the first end of the powder feeding pipe is connected to the evaporation chamber, and the air feeding pipe is connected to a protective gas source.

[0007] In some embodiments, the silver-coated copper powder preparation device also includes a pretreatment mechanism, which includes a pickling tank and a drying tank. The pickling tank is used to pickle the copper powder in an oxygen-free environment, and the drying tank is used to dry the copper powder. The drying tank is connected to the second end of the powder feeding pipe.

[0008] In some embodiments, the silver-coated copper powder preparation device also includes a collecting box, which is connected to the cyclone separator to collect silver-coated copper powder particles, and one side of the collecting box is connected to a protective gas source to dry the silver-coated copper powder particles.

[0009] In some embodiments, a filter is provided in the collection box to separate the silver-coated copper powder particles and water.

[0010] In some embodiments, the silver-coated copper powder preparation device further includes an ultrasonic dispersion device, and the ultrasonic dispersion device is located on the inner wall of the evaporation chamber to disperse the silver vapor.

[0011] In some embodiments, the powder feeding mechanism further includes an adjusting member, and the adjusting member is connected to the powder feeding pipe to adjust the angle of the powder feeding pipe relative to the horizontal plane of the bottom of the evaporation chamber.

[0012] In some embodiments, the coating chamber has a material drop channel, a first end of the material drop channel is connected to the mixing chamber, and a second end of the material drop channel is connected to the cyclone separator.

[0013] In some embodiments, a protective coating is provided on the inner wall of the material dropping channel.

[0014] In some embodiments, a plurality of the air supply nozzles are equidistantly arranged on both sides of the mixing chamber in the vertical direction, and each of the air supply nozzles corresponds to a regulating valve, and the regulating valve is used to adjust the air flow velocity of the air supply nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of a device for preparing silver-coated copper powder according to an embodiment of the present invention.

[0016] Figure numerals: 1. Evaporation chamber; 2. Coating chamber; 3. Feeding pipe; 4. Laser heating device; 5. Mixing chamber; 6. Cyclone separator; 7. Powder feeding pipe; 8. Air feeding pipe; 9. Pickling tank; 10. Drying tank; 11. Collecting box; 12. Filter screen; 13. Ultrasonic dispersion device; 14. Air supply nozzle. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0018] According to an embodiment of the present invention, a silver-coated copper powder preparation device comprises a device body, a powder feeding mechanism, an air supply mechanism and a cyclone separator 6. The device body comprises an evaporation chamber 1 and a coating chamber 2. A feeding pipe 3 is arranged on the top of the evaporation chamber 1. Laser heating devices 4 are arranged on both sides of the feeding pipe 3. The laser heating device 4 heats the silver powder to form silver vapor. The laser of the laser heating device 4 intersects with the extended axis of the feeding pipe 3 at a point in the evaporation chamber 1. The copper powder and the silver vapor in the coating chamber 2 contact to form silver-coated copper powder particles. The coating chamber 2 has a mixing chamber 5 at one end adjacent to the evaporation chamber 1. The cross-sectional area of ​​the mixing chamber 5 decreases with increasing distance from the evaporation chamber 1. The powder feeding mechanism is connected to the device body to blow the copper powder into the silver vapor. The air supply mechanism comprises a plurality of air supply nozzles 14 located on the inner wall of the coating chamber 2 to form an ascending spiral airflow. The spiral airflow is used to prolong the mixing time of the copper powder and the silver vapor. The cyclone separator 6 is located below the device body to separate unqualified silver-coated copper powder particles. Laser heating can achieve rapid heating and improve the evaporation efficiency of silver powder. The laser power can be precisely controlled to control the temperature of the silver vapor and ensure the coating quality. The spiral airflow can evenly mix the copper powder with the silver vapor and prolong the residence time of the copper powder, ensuring that the copper powder is fully in contact with the silver vapor and improving the product quality.

[0019] The silver-coated copper powder preparation device according to the embodiment of the present invention has the advantages of high silver-coated copper powder preparation efficiency and good product uniformity.

[0020] In some embodiments, the powder feeding mechanism includes a powder feeding pipe 7 and an air feeding pipe 8. The air feeding pipe 8 is perpendicular to the powder feeding pipe 7 and connected to the powder feeding pipe 7. The first end of the powder feeding pipe 7 is connected to the evaporation chamber 1, and the air feeding pipe 8 is connected to the protective gas source.

[0021] Specifically, the protective gas source can be an inert gas such as nitrogen to protect the copper powder and silver powder from oxidation in a high temperature environment that affects the coating quality. The powder delivery pipe 7 and the air delivery pipe 8 cooperate to ensure the stability and continuity of copper powder delivery.

[0022] In some embodiments, the silver-coated copper powder preparation device also includes a pretreatment mechanism, which includes a pickling tank 9 and a drying tank 10. The pickling tank 9 is used to pickle the copper powder in an oxygen-free environment, and the drying tank 10 is used to dry the copper powder. The drying tank 10 is connected to the second end of the powder feeding pipe 7.

[0023] Specifically, pickling the copper powder can effectively remove the oxide on the surface of the copper powder, improve the cleanliness of the copper powder, and thus improve the coating effect. The drying tank 10 dries the copper powder to reduce the agglomeration of the copper powder, which is conducive to dispersing the copper powder. The pretreatment process of the copper powder is carried out in an oxygen-free environment to prevent the copper powder from being oxidized. The purity and quality of the silver-coated copper powder are improved. The continuity and stability of the production process are guaranteed.

[0024] In some embodiments, the silver-coated copper powder preparation device further includes a collecting box 11, which is connected to the cyclone separator 6 to collect the silver-coated copper powder particles, and one side of the collecting box 11 is connected to a protective gas source to dry the silver-coated copper powder particles.

[0025] Specifically, the collecting box 11 is used to collect silver-coated copper powder particles of target specifications. A resistance wire can be set outside the collecting box 11 to heat the protective gas from the protective gas source. The protective gas can both dry the silver-coated copper powder particles and prevent them from oxidation.

[0026] In some embodiments, a filter screen 12 is disposed in the collection box 11 to separate the silver-coated copper powder particles and water.

[0027] Specifically, the filter 12 can separate the silver-coated copper powder particles and moisture to ensure the quality of the silver-coated copper powder. The protective gas source can take away the moisture on the surface of the silver-coated copper powder when it passes from the bottom of the filter 12, thereby improving the quality of the copper powder and preventing the particles from oxidizing.

[0028] In some embodiments, the silver-coated copper powder preparation device further includes an ultrasonic dispersion device 13 , which is located on the inner wall of the evaporation chamber 1 to disperse silver vapor.

[0029] Specifically, the ultrasonic dispersion device 13 uses ultrasonic waves to drive the silver vapor to vibrate, which can disperse the silver vapor into finer particles, increase the contact area with the copper powder, improve the coating effect, and improve the uniformity and quality of the silver-coated copper powder. The ultrasonic dispersion device 13 can be arranged symmetrically about the feeding pipe 3. The ultrasonic dispersion device 13 includes an ultrasonic generator, which generates ultrasonic waves to drive the silver vapor to vibrate and disperse.

[0030] In some embodiments, the powder feeding mechanism further includes an adjusting member, which is connected to the powder feeding pipe 7 to adjust the angle between the powder feeding pipe 7 and the horizontal plane at the bottom of the evaporation chamber 1 .

[0031] Specifically, the adjusting member makes the powder feeding angle of the powder feeding pipe 7 adjustable, and the angle of the powder feeding pipe 7 relative to the bottom of the evaporation chamber 1 can be adjusted as needed to optimize the conveying path of the copper powder. The conveying efficiency and coating effect of the copper powder are improved. The adjusting member includes a rotating seat, and the powder feeding pipe 7 is rotatably connected to the rotating seat, and the other side of the rotating seat is connected to the device body. It can be understood that the powder feeding pipe 7 can also be arranged on a sliding bracket, and the powder feeding pipe 7 slides relative to the sliding bracket to change the powder feeding angle.

[0032] In some embodiments, a material dropping channel is provided in the coating chamber 2 , a first end of the material dropping channel is connected to the mixing chamber 5 , and a second end of the material dropping channel is connected to the cyclone separator 6 .

[0033] Specifically, the length of the blanking channel is positively correlated with the cooling time of the silver-coated copper powder particles, and the silver-coated copper powder particles are cooled as they descend in the blanking channel.

[0034] In some embodiments, a protective coating is provided on the inner wall of the material dropping channel.

[0035] Specifically, a ceramic coating can be provided on the inner wall of the blanking channel to reduce the adhesion of silver-coated copper powder particles, extend the service life of the equipment, maintain the cleanliness of the coating chamber, and facilitate continuous production.

[0036] In some embodiments, a plurality of air supply nozzles 14 are equidistantly arranged on both sides of the mixing chamber 5 in the vertical direction, and each air supply nozzle 14 corresponds to a regulating valve, which is used to adjust the air flow velocity of the air supply nozzle 14 .

[0037] Specifically, the regulating valve can adjust the air flow speed of each air supply nozzle 14 as needed, optimize the distribution of the spiral air flow, and improve the uniformity and quality of the silver-coated copper powder. The air supply nozzles 14 distributed at equal intervals in the vertical direction can form a more stable spiral air flow to reduce interference between air flows. The air supply nozzles 14 are symmetrical about the mixing chamber 5, which can ensure the symmetry of the spiral air flow and avoid air flow deviation.

[0038] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for preparing silver-coated copper powder, characterized in that: include: The device body comprises an evaporation chamber and a coating chamber, a feeding pipe is arranged on the top of the evaporation chamber, laser heating devices are arranged on both sides of the feeding pipe, the laser heating device heats the silver powder to form silver vapor, the laser of the laser heating device intersects with the extended axis line of the feeding pipe at a point in the evaporation chamber, the copper powder in the coating chamber contacts with the silver vapor to form silver-coated copper powder particles, and the coating chamber has a mixing chamber at one end adjacent to the evaporation chamber, and the cross-sectional area of ​​the mixing chamber decreases as the distance from the evaporation chamber increases; A powder feeding mechanism, the powder feeding mechanism is connected to the device body and is used to blow copper powder into the silver vapor; An air supply mechanism, the air supply mechanism comprising a plurality of air supply nozzles located on the inner wall of the coating chamber to form an ascending spiral airflow, the spiral airflow being used to prolong the mixing time of the copper powder and the silver vapor; A cyclone separator is located below the device body and is used to separate unqualified silver-coated copper powder particles.

2. The silver-coated copper powder preparation device according to claim 1, characterized in that: The powder feeding mechanism comprises a powder feeding pipe and an air feeding pipe, wherein the air feeding pipe is perpendicular to the powder feeding pipe and is connected to the powder feeding pipe, a first end of the powder feeding pipe is connected to the evaporation chamber, and the air feeding pipe is connected to a protective gas source.

3. The silver-coated copper powder preparation device according to claim 2, characterized in that: It also includes a pretreatment mechanism, which includes a pickling tank and a drying tank. The pickling tank is used to pickle the copper powder in an oxygen-free environment, and the drying tank is used to dry the copper powder. The drying tank is connected to the second end of the powder feeding pipe.

4. The silver-coated copper powder preparation device according to claim 1, characterized in that: It also includes a collecting box, which is connected to the cyclone separator to collect silver-coated copper powder particles. One side of the collecting box is connected to a protective gas source to dry the silver-coated copper powder particles.

5. The silver-coated copper powder preparation device according to claim 4, characterized in that: A filter is arranged in the collection box to separate the silver-coated copper powder particles and water.

6. The silver-coated copper powder preparation device according to claim 1, characterized in that: It also includes an ultrasonic dispersing device, which is located on the inner wall of the evaporation chamber and is used to disperse the silver vapor.

7. The silver-coated copper powder preparation device according to claim 2, characterized in that: It also includes an adjusting member, which is connected to the powder delivery pipe and is used to adjust the angle of the powder delivery pipe relative to the horizontal plane at the bottom of the evaporation chamber.

8. The silver-coated copper powder preparation device according to claim 1, characterized in that: The coating chamber is provided with a material dropping channel, a first end of the material dropping channel is connected to the mixing chamber, and a second end of the material dropping channel is connected to the cyclone separator.

9. The silver-coated copper powder preparation device according to claim 8, characterized in that: A protective coating is arranged on the inner wall of the material dropping channel.

10. The silver-coated copper powder preparation device according to claim 1, characterized in that: A plurality of the air supply nozzles are equidistantly arranged on both sides of the mixing chamber in the vertical direction, and each of the air supply nozzles corresponds to a regulating valve, and the regulating valve is used to adjust the air flow velocity of the air supply nozzle.

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