Device for continuously producing dendritic copper powder

Abstract

The utility model discloses a device for continuously producing dendritic copper powder. The device comprises a bracket, an electrolysis structure, a powder collecting structure and a height adjusting structure, the electrolysis structure comprises an electrolytic bath, an anode plate and a cathode roller; the anode plate is a phosphorus copper plate, two ends of the anode plate are lapped on two sides of a top opening of the electrolytic tank, and the middle part is sunken to form a semi-cylindrical groove in the electrolytic tank; the cathode roller is arranged on the bracket, is positioned above the anode plate and is in clearance fit with the semicircular cylinder groove; the powder collecting structure is connected to the support and located on one side of the cathode roller and comprises a powder collecting groove and a scraper, and the scraper is made of an elastic material, connected to the side edge of the powder collecting groove and attached to the cathode roller; and the height adjusting structure is used for adjusting the height position of the electrolytic bath so as to regulate and control the size of a gap between the anode plate and the cathode roller. The device can achieve continuous production, electrolysis parameters are easy to control, the electrolytic copper powder collecting efficiency is high, and the device is suitable for actual production and application.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal powder preparation, and in particular relates to a device for continuously producing dendritic copper powder. Background Art

[0002] Copper powder materials are widely favored in the field of metal functional materials due to their own electrical conductivity, ductility, low price and other characteristics, and have great development prospects. There are many methods for preparing copper powder, such as mechanical powder making, electrolysis, gas reduction, atomization, plasma deposition, liquid phase reduction, etc. Among them, dendritic copper powder is mainly prepared by electrolysis. Due to its special morphology and structure, dendritic copper powder has a large specific surface area and is easy to form a three-dimensional mesh structure conductive network with good conductivity. Therefore, it is widely used in electronic slurry, shielding materials, batteries, aerospace and other fields.

[0003] However, the traditional electrolytic method for preparing dendritic copper powder requires regular stopping to discharge powder, or manual powder brushing, and constant replacement of electrolyte, which has low production efficiency and consumes a lot of labor and time costs. The prior art has designed the cathode into a track to move continuously and cyclically, realizing continuous electrodeposition and continuous particle collection, but the cost of customizing the annular track is expensive. If metal foil welding is used, the welding points may cause problems such as difficulty in rolling the track and jamming, and the track is prone to misalignment when the electrodeposition time is too long. In the collection of copper powder, the prior art has methods such as using a brush to collect copper powder and a powder brush roller combined with a spray water gun, but the above methods have low collection efficiency due to problems such as copper powder embedding in the brush. The above problems limit the preparation and application of dendritic copper powder. Utility Model Content

[0004] The utility model aims at the deficiencies in the prior art and provides a device for continuously producing dendritic copper powder.

[0005] In order to achieve the above objectives, the technical solution of the utility model is:

[0006] A device for continuously producing dendritic copper powder comprises a support, an electrolysis structure, a powder collecting structure and a height adjustment structure; the electrolysis structure comprises an electrolytic cell, an anode plate and a cathode roller; the anode plate is a phosphor copper plate, with two ends overlapping the two sides of the top opening of the electrolytic cell, and a concave middle portion forming a semi-cylindrical groove located in the electrolytic cell; the cathode roller is mounted on the support, located above the anode plate and matching the semi-cylindrical groove gap; the powder collecting structure is mounted on the support and located on one side of the cathode roller, comprising a powder collecting trough and a scraper, the scraper is made of elastic material, connected to the side of the powder collecting trough and close to the cathode roller; the height adjustment structure is used to adjust the height position of the electrolytic cell to regulate the gap size between the anode plate and the cathode roller.

[0007] Optionally, the thickness of the anode plate is 0.1-0.7 mm.

[0008] Optionally, both ends of the anode plate cover the top surface of the side wall of the electrolytic cell, and are bent and extended to cover a portion of the outer surface of the side wall of the electrolytic cell.

[0009] Optionally, anode connection points for external power supply are respectively provided at both ends of the anode plate.

[0010] Optionally, the cathode roller is hollow and has closed end faces, with a roller shaft provided in the middle, and both ends of the roller shaft are connected to the end faces of the cathode roller and pass through the end faces of the cathode roller; the bracket is provided with connecting holes that cooperate with the roller shaft, and both ends of the roller shaft pass through the connecting holes respectively, one end is connected to the rotating drive mechanism, and the other end forms a cathode connection point for an external power supply.

[0011] Optionally, both end surfaces of the cathode roller are covered with an insulating layer.

[0012] Optionally, the electrolytic cell is provided with a strip-shaped notch for accommodating the roller shaft.

[0013] Optionally, a liquid outlet is further provided on the lower side of the electrolytic cell, and the liquid outlet is controlled by a liquid outlet switch.

[0014] Optionally, both ends of the powder collecting trough are swingably connected to the bracket, and the scraper is arranged parallel to the cathode roller.

[0015] Optionally, the bracket includes a bottom plate and two side plates, the side plates are fixed to the bottom plate, the electrolytic cell is placed between the side plates, and the height adjustment structure is a lifting platform arranged between the bottom of the electrolytic cell and the bottom plate.

[0016] The beneficial effects of the utility model are:

[0017] The device for continuously producing dendritic copper powder of the utility model can realize continuous production, the electrolysis parameters are easy to control, the electrolytic copper powder collection efficiency is high, and the utility model is suitable for actual production application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a three-dimensional structure at one angle of a device for continuously producing dendritic copper powder in an embodiment;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the device for continuously producing dendritic copper powder in another angle of the embodiment;

[0020] Figure 3 It is a schematic diagram of the top view of the structure of the device for continuously producing dendritic copper powder in the embodiment;

[0021] Figure 4 It is a partial structural three-dimensional cross-sectional view of a device for continuously producing dendritic copper powder in an embodiment;

[0022] Figure 5 It is a schematic diagram of the partial structural position relationship of the device for continuously producing dendritic copper powder in the embodiment;

[0023] Figure 6 A schematic diagram of a height adjustment structure of a device for continuously producing dendritic copper powder according to an embodiment;

[0024] Figure 7 It is a circuit connection schematic diagram of the device for continuously producing dendritic copper powder in the embodiment;

[0025] In the figure:

[0026] Bracket 1, bottom plate 11, side plate 12, connecting hole 121;

[0027] Electrolysis structure 2, electrolytic cell 21, anode plate 22, cathode roller 23, roller shaft 24, rotation drive mechanism 25, insulating layer 26, strip notch 21a, semi-cylindrical groove 22a, overlap 22b, liquid outlet 211, liquid outlet switch 212, anode connection point A, cathode connection point B;

[0028] Powder collecting structure 3, powder collecting groove 31, scraper 32, adjustment buckle 33, discharge port 34, gate 311;

[0029] Height adjustment structure 4, upper platform 41, lower platform 42, X-shaped lifting frame 43, connecting rods 44, 45, fixing seat 46, adjusting screw rod 47, fixed shaft 431, movable shaft 432, slide rail 461. DETAILED DESCRIPTION

[0030] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0031] refer to Figures 1 to 4 The device for continuously producing dendritic copper powder in the embodiment comprises a support 1, an electrolysis structure 2, a powder collecting structure 3 and a height adjustment structure 4. The electrolysis structure 2 comprises an electrolytic cell 21, an anode plate 22 and a cathode roller 23, wherein the two ends of the anode plate 22 overlap the two sides of the top opening of the electrolytic cell 21, and the middle part is concave to form a semi-cylindrical groove 22a located in the electrolytic cell 21. The cathode roller 23 is mounted on the support 1, located above the anode plate 22 and having a gap with the semi-cylindrical groove 22a. The powder collecting structure 3 is mounted on the support 1 and located on one side of the cathode roller 23, and comprises a powder collecting groove 31 and a scraper 32. The scraper 32 is made of elastic material, connected to the side of the powder collecting groove 31 and close to the cathode roller 23. The height adjustment structure 4 is used to adjust the height position of the electrolytic cell 21 to regulate the gap between the semi-cylindrical groove 22a of the anode plate 22 and the cathode roller 23.

[0032] The anode plate 22 is a phosphor copper plate with a thickness of 0.1-0.7 mm. Compared with the insoluble anode material, the phosphor copper plate is used as the anode, and Cu3P can be generated during the reaction process, so that a black protective film is formed on the surface of the phosphor copper plate. The protective film can control the dissolution rate of copper, make the current efficiency of the anode close to the current efficiency of the cathode, and keep the copper ions in the plating solution balanced, which greatly reduces the generation of anode mud and reduces the replacement frequency of the electrolyte. The two ends of the anode plate 22 form a lap joint 22b, which covers the top surface of the side wall of the electrolytic cell 21 and bends to extend to the outer surface of the part of the side wall covered. The part located in the electrolytic cell 21 is bent downward to form a semi-cylindrical groove 22a, so that the anode plate 22 and the electrolytic cell 21 have a stable positional relationship, which is also convenient for the replacement of the anode plate 22. The lap joints 22b at both ends are respectively provided with anode connection points A for external power supply.

[0033] The cathode roller 23 is, for example, a hollow titanium tube, with a roller shaft 24 disposed in the middle. The roller shaft 24 is located at the central axis of the cathode roller 23, and the two end faces of the hollow titanium tube are welded and closed. The two ends of the roller shaft 24 penetrate the end faces and extend outward, where the roller shaft 24 is connected and sealed with the end faces. The cathode roller 23 adopts a hollow structure to avoid the overall heavy structure of the device and reduce the cost of the cathode. In one embodiment, the bracket 1 includes a bottom plate 11 and two vertical side plates 12 fixed to the bottom plate. The electrolytic cell 21 is located between the two vertical side plates 12. The side plates 12 are provided with connection holes 121. The two ends of the roller shaft 24 pass through the connection holes 121 respectively, one end is connected to the rotation drive mechanism 25, and the other end forms a cathode connection point B for an external power supply. It can be understood that the roller shaft 24 and the cathode roller 23 are electrically connected through their end faces. The rotation drive mechanism 25 is, for example, a servo motor, fixed to the bracket 1, and used to drive the cathode roller 23 to rotate through the roller shaft 24. The two end surfaces of the cathode roller 23 are covered with an insulating layer 26, such as a resin coating, to prevent the copper powder from being deposited and unable to be collected, which affects the electrolysis efficiency. In addition, the cathode roller 23 and the roller shaft 24 can also be made of other electrode materials, including but not limited to graphite, copper, stainless steel, etc.

[0034] The two ends of the powder collecting tank 31 are swingably connected to the two vertical side plates 12 through adjustable buckles 33. The scraper 32 is arranged parallel to the cathode roller 23 and close to the cathode roller 23. The degree of closeness between the scraper 32 and the cathode roller 23 can be adjusted by adjusting the buckle 33. The powder collecting tank 31 is, for example, a long horse trough structure. The scraper 32 adopts a silicone scraper strip. The copper powder generated on the surface of the cathode roller 23 is collected in the powder collecting tank 31 by the scraper 32. The collection efficiency is high and the method is simple. The cost of the additional motor installed for brush roller cleaning and the embedding of copper powder in the brush are avoided. A gate 311 can be set at the outlet of the powder collecting tank 31. When the gate 311 is closed, an acid solution can be added to the powder collecting tank 31 to avoid oxidation of the dendritic copper powder; when the gate 311 is opened, the copper powder can be transferred through the discharge port 34 connected to the powder collecting tank 31.

[0035] The cathode roller 23 and the semi-cylindrical groove 22a are spaced apart, and the distance between the two is the inter-electrode distance. By adjusting the inter-electrode distance, the parameters of the electrolytic copper powder can be changed to adjust the morphology of the electrolytic copper powder. In one embodiment, the height adjustment structure 4 is a lifting platform provided between the bottom plate 11 and the bottom of the electrolytic cell 21. The height position of the electrolytic cell 21 is changed by raising and lowering the height of the lifting platform, thereby making the anode plate 22 closer to or farther away from the cathode roller 23 to change the inter-electrode distance. Figure 5 The side wall of the electrolytic cell 21 is provided with a strip-shaped slot 21a to allow the roller 24 to move up and down.

[0036] refer to Figure 6For example, the height adjustment structure 4 adopts an X-shaped lifting platform, which includes an upper platform 41, a lower platform 42 and an X-shaped lifting frame 43 located on the left and right sides between the upper platform 41 and the lower platform 42. Each lifting frame includes a crossed fixed shaft 431 and a movable shaft 432. The two ends of the fixed shaft 431 of the two X-shaped lifting frames 43 are connected by connecting rods 44, and the two ends of the movable shaft 432 are connected by connecting rods 45. The upper platform 41 and the lower platform 42 are connected to the opposite side with a fixed seat 46, and the fixed seat 46 is provided with a slide rail 461. The upper and lower connecting rods 45 of the movable shaft 432 are respectively matched in the slide rails 461 of the upper and lower fixed seats 46, so that the intersection angle between the fixed shaft 431 and the movable shaft 432 can be changed by sliding in the slide rail 461 to adjust the distance between the upper platform 41 and the lower platform 42. For ease of operation, an adjusting screw rod 47 is provided between the connecting rods 44 and 45 at the bottom ends, and the adjusting screw rod 47 is used to achieve fine adjustment of the X-shaped cross angle, thereby achieving fine adjustment of the inter-pole spacing.

[0037] In addition, other conventional structures that can achieve height adjustment can also be used without limitation.

[0038] When the above-mentioned apparatus for continuously producing dendritic copper powder is used to continuously produce dendritic copper powder, the inter-electrode distance can be controlled by the height adjustment structure 4, and the rotation speed of the cathode roller 23 can be set by the rotation drive mechanism 25, so as to adjust the electrolysis parameters and conveniently realize the adjustment of the copper powder structure. Figure 7 , the two anode connection points A and the cathode connection point B are connected to an AC variable frequency power supply. The electrolytic cell 21 contains electrolyte, the cathode roller 23 is powered and rotates at a preset speed, and copper powder is electrolyzed on the surface of the cathode roller 23 by applying an electrolytic voltage to the anode and the cathode. When the cathode roller 23 rotates to the point where the roller surface contacts the scraper 32, the copper powder is scraped off and collected in the powder collecting tank 31, thereby realizing continuous production. A liquid outlet 211 is also provided on the lower side of the electrolytic cell 21, and the liquid outlet 211 is controlled by a liquid outlet switch 212 to facilitate liquid discharge.

[0039] The above embodiments are only used to further illustrate a device for continuously producing dendritic copper powder of the utility model, but the utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. A device for continuously producing dendritic copper powder, characterized in that: It includes a support, an electrolysis structure, a powder collecting structure and a height adjustment structure; The electrolysis structure comprises an electrolytic cell, an anode plate and a cathode roller; the anode plate is a phosphor copper plate, with two ends overlapped on both sides of the top opening of the electrolytic cell, and the middle part is concave to form a semi-cylindrical groove located in the electrolytic cell; the cathode roller is mounted on the bracket, located above the anode plate and having a clearance fit with the semi-cylindrical groove; The powder collecting structure is mounted on the bracket and located on one side of the cathode roller, and includes a powder collecting groove and a scraper. The scraper is made of elastic material, connected to the side of the powder collecting groove and close to the cathode roller; The height adjustment structure is used to adjust the height position of the electrolytic cell to regulate the gap size between the anode plate and the cathode roller.

2. The device for continuously producing dendritic copper powder according to claim 1, characterized in that: The thickness of the anode plate is 0.1-0.7 mm.

3. The device for continuously producing dendritic copper powder according to claim 1, characterized in that: The two ends of the anode plate cover the top surface of the side wall of the electrolytic cell and are bent and extended to cover a portion of the outer surface of the side wall of the electrolytic cell.

4. The device for continuously producing dendritic copper powder according to claim 1, characterized in that: Anode connection points for external power supply are respectively arranged at both ends of the anode plate.

5. The device for continuously producing dendritic copper powder according to claim 1, characterized in that: The cathode roller is hollow and has closed end faces, with a roller shaft provided in the middle, and both ends of the roller shaft connected to and passing through the end faces of the cathode roller; the bracket is provided with connecting holes that cooperate with the roller shaft, and both ends of the roller shaft pass through the connecting holes respectively, one end is connected to the rotation drive mechanism, and the other end forms a cathode connection point for an external power supply.

6. The device for continuously producing dendritic copper powder according to claim 5, characterized in that: The surfaces of both ends of the cathode roller are covered with an insulating layer.

7. The device for continuously producing dendritic copper powder according to claim 5, characterized in that: The electrolytic cell is provided with a strip-shaped notch for accommodating the roller shaft.

8. The device for continuously producing dendritic copper powder according to claim 1, characterized in that: A liquid outlet is also provided on the lower side of the electrolytic cell, and the liquid outlet is controlled by a liquid outlet switch.

9. The device for continuously producing dendritic copper powder according to claim 1, characterized in that: The two ends of the powder collecting trough are swingably connected to the bracket, and the scraper is arranged parallel to the cathode roller.

10. The device for continuously producing dendritic copper powder according to claim 1, characterized in that: The bracket includes a bottom plate and two side plates, the side plates are fixed to the bottom plate, the electrolytic cell is placed between the side plates, and the height adjustment structure is a lifting platform arranged between the bottom of the electrolytic cell and the bottom plate.

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