A superfine copper powder surface modification uniform coating device

Abstract

The utility model discloses a superfine copper powder surface modification even coating device relates to superfine copper powder processing field, aims at solving the problem of uneven coating of existing device, copper powder easy reunion. The device includes the cylinder of taking the top cap, and the lower section of cylinder is equipped with vibration subassembly, and its output end is connected to the feeding tray, and the feeding tray slip joint cylinder inner wall, is equipped with stirring subassembly on the top cap. Vibration subassembly contains cylinder outside drive motor, and its output end is connected to the drive shaft, and the driven shaft is equipped with symmetry in the cylinder, and transmission kit is between the two, and all are symmetrically equipped with cam to lift the feeding tray. Transmission kit is constituted by driving wheel, driven wheel and belt, stirring subassembly contains rotating electrical machine, rotating axle and stirring vane, and the top cap is connected through internal and external thread cylinder thread with the cylinder. The device is in the synergistic effect of vibration and stirring, realizes copper powder dispersion fully, promotes the uniformity of coating, and reliable sealing, convenient operation, is applicable to superfine copper powder surface modification coating operation.

Description

Technical Field

[0001] This utility model relates to the field of ultrafine copper powder processing technology, and in particular to a device for uniform coating of ultrafine copper powder surface modification. Background Technology

[0002] Ultrafine copper powder, due to its high specific surface area, excellent electrical and thermal conductivity, and catalytic properties, is widely used in electronic pastes, conductive composite materials, catalysts, and other fields. In practical applications, to improve the stability, dispersibility, and compatibility with matrix materials of ultrafine copper powder, surface modification treatment is required. The core step is to uniformly coat the surface of the copper powder particles with a modifier film.

[0003] Existing ultrafine copper powder surface coating devices have several shortcomings: First, most devices rely solely on a single stirring method, which easily leads to the agglomeration of ultrafine copper powder, preventing the modifier from contacting the internal particles and resulting in poor coating uniformity. Second, some devices lack an effective material turning mechanism, causing the copper powder to remain in a fixed position within the reaction area, resulting in localized imbalances in modifier concentration and uneven coating thickness. Third, the devices lack sufficient sealing performance and ease of disassembly and assembly, which not only easily leads to the volatilization of the modifier or the introduction of external impurities but also increases the difficulty of equipment cleaning and maintenance, affecting production efficiency and product quality. Utility Model Content

[0004] The purpose of this invention is to provide a device for uniformly coating the surface of ultrafine copper powder, which aims to solve the problems of uneven coating and easy agglomeration of copper powder in existing devices.

[0005] To achieve the above objectives, this utility model employs an ultrafine copper powder surface modification and uniform coating device, comprising a cylindrical body with a top cover, a vibration assembly in the lower section of the cylindrical body, a feeding tray at the output end of the vibration assembly, the feeding tray being slidably disposed on the inner side wall of the cylindrical body, and a stirring assembly on the top cover; the vibration assembly includes a drive motor disposed on the outer side wall of the cylindrical body, a drive shaft extending into the cylindrical body at the output end of the drive motor, a driven shaft horizontally symmetrically disposed on the cylindrical body at the position of the drive shaft, a transmission assembly between the driven shaft and the drive shaft, and two cams symmetrically disposed on the driven shaft and the drive shaft, with multiple cams lifting the feeding tray.

[0006] The transmission assembly includes a drive wheel mounted on the drive shaft, a driven wheel mounted on the driven shaft at a position corresponding to the drive wheel, and a belt mounted on the drive wheel and the driven wheel, and the transmission is carried out through the belt.

[0007] The stirring assembly includes a rotary motor mounted on the top cover, and the output end of the rotary motor is provided with a rotary shaft extending into the discharge tray. Multiple stirring blades are evenly arranged on the rotary shaft.

[0008] The top cover is provided with an external threaded cylinder below it, and the cylinder body is provided with an internal threaded cylinder above it. The internal threaded cylinder is threadedly connected to the external threaded cylinder and is located inside the external threaded cylinder.

[0009] The two ends of the drive shaft and the driven shaft are rotatably mounted on the inner side wall of the cylinder via bearings.

[0010] Beneficial effects:

[0011] Significantly improved coating uniformity: Through the synergistic effect of the vibration component and the stirring component, the vibration continuously agitates the copper powder, and the stirring blades shear and disperse the copper powder, effectively preventing agglomeration and ensuring that each copper powder particle can fully contact the modifier to achieve uniform coating.

[0012] Reliable sealing and easy operation: The top cover and the cylinder are connected by threads and sealed with a gasket, which provides a good sealing effect. At the same time, it is easy to disassemble and assemble, and facilitates feeding, unloading and cleaning of equipment. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the ultrafine copper powder surface modification and uniform coating device of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the cylinder of this utility model.

[0016] Figure 3 This is a structural schematic diagram of the vibration component of this utility model.

[0017] 101-Cylinder body, 102-Top cover, 103-Rotary motor, 104-Rotary shaft, 105-Stirring blade, 106-Discharge tray, 107-Drive motor, 108-Drive shaft, 109-Driven shaft, 110-Cam, 111-Drive wheel, 112-Driven wheel, 113-Belt, 114-Internal threaded cylinder, 115-External threaded cylinder. Detailed Implementation

[0018] Please see Figures 1-3,in, Figure 1 This is a schematic diagram of the ultrafine copper powder surface modification and uniform coating device of this utility model. Figure 2 This is a schematic diagram of the internal structure of the cylinder of this utility model. Figure 3 This is a structural schematic diagram of the vibration component of this utility model.

[0019] This utility model provides a device for uniformly coating and modifying the surface of ultrafine copper powder, including a cylindrical body 101 with a top cover 102. A vibration assembly is provided in the lower section of the cylindrical body 101, and a feeding tray 106 is provided at the output end of the vibration assembly. The feeding tray 106 is slidably disposed on the inner side wall of the cylindrical body 101. A stirring assembly is provided on the top cover 102. The vibration assembly includes a drive motor 107 disposed on the outer side wall of the cylindrical body 101. A drive shaft 108 extending into the cylindrical body 101 is provided at the output end of the drive motor 107. A driven shaft 109 is horizontally symmetrically disposed on the cylindrical body 101 at the position of the drive shaft 108. A transmission kit is provided between the driven shaft 109 and the drive shaft 108. Two cams 110 are symmetrically disposed on the driven shaft 109 and the drive shaft 108, and multiple cams 110 lift the feeding tray 106.

[0020] In this embodiment, the cylinder 101 is integrally formed from a corrosion-resistant metal material, with an overall cylindrical hollow structure. This ensures the overall structural strength of the device, resists vibration and impact during long-term use, and is compatible with various acidic and alkaline modifiers, preventing material corrosion from affecting the coating effect and equipment lifespan. The discharge tray 106 is made of wear-resistant metal material, with an overall cylindrical structure open at the top. Its outer wall maintains a reasonable gap with the inner wall of the cylinder 101, ensuring smooth up-and-down sliding of the discharge tray 106 while preventing copper powder from leaking out through the gap. A wear-resistant liner is added to the part of the discharge tray 106 that contacts the cam 110, further improving the wear resistance of the discharge tray 106 and reducing wear caused by long-term vibration contact.

[0021] Furthermore, the transmission assembly includes a drive wheel 111 disposed on the drive shaft 108, a driven wheel 112 disposed on the driven shaft 109 at a position corresponding to the drive wheel 111, and a belt 113 sleeved on the drive wheel 111 and the driven wheel 112, and transmission is carried out through the belt 113.

[0022] In this embodiment, the driving wheel 111 and the driven wheel 112 adopt the same specification of synchronous pulley and are matched with the corresponding synchronous belt to form a transmission structure. This design can ensure that the driving shaft 108 and the driven wheel 112 always rotate synchronously, avoid the problem of uneven force and vibration imbalance on both sides of the feeding plate 106 due to transmission speed deviation, and ensure the stable operation of the feeding plate 106.

[0023] Furthermore, the stirring assembly includes a rotary motor 103 disposed on the top cover 102, and the output end of the rotary motor 103 is provided with a rotary shaft 104 extending into the discharge tray 106, and a plurality of stirring blades 105 are uniformly disposed on the rotary shaft 104.

[0024] In this embodiment, the rotary motor 103 adopts a variable frequency speed control type, which can flexibly adjust the speed according to the particle size, agglomeration degree of ultrafine copper powder and the viscosity of modifier to adapt to different coating requirements; the rotary shaft 104 is made of high-strength metal material to ensure that it is not easily bent or deformed during high-speed rotation; the stirring blades 105 are symmetrically distributed and have a certain tilt angle with the rotary shaft 104, which can enhance the shearing and dispersion effect of copper powder and reduce the splashing and adhesion of copper powder during stirring. At the same time, the surface of the stirring blades 105 is treated with anti-sticking to further reduce copper powder residue.

[0025] Furthermore, an external threaded cylinder 115 is provided below the top cover 102, and an internal threaded cylinder 114 is provided above the cylinder body 101. The internal threaded cylinder 114 is threadedly connected to the external threaded cylinder 115 and is located inside the external threaded cylinder 115.

[0026] In this embodiment, the external threaded cylinder 115 and the top cover 102 are an integrated structure, while the internal threaded cylinder 114 is fixedly connected to the cylinder body 101. The thread specifications of the two are precisely matched, and the thread connection length is optimized. This ensures the stability of the connection between the top cover 102 and the cylinder body 101, preventing the top cover 102 from loosening during equipment operation. It also achieves a good sealing effect through the threaded fit, reducing the volatilization of the modifier and the entry of external impurities.

[0027] Furthermore, the two ends of the drive shaft 108 and the driven shaft 109 are respectively rotatably mounted on the inner wall of the cylinder 101 via bearings.

[0028] In this embodiment, a high-precision rotating bearing is selected. Its outer ring is tightly fitted with the mounting hole on the inner side wall of the cylinder 101, while the inner ring is precisely matched with the drive shaft 108 and the driven shaft 109, ensuring smooth rotation of the drive shaft 108 and the driven shaft 109 and reducing operating noise and wear. At the same time, a sealing structure is set on the outside of the bearing, which can effectively prevent copper powder particles and modifiers from entering the bearing, avoiding bearing jamming and damage, and extending service life.

[0029] Working principle

[0030] Material preparation: Rotate the top cover 102 to separate the external threaded cylinder 115 from the internal threaded cylinder 114. After opening the cylinder 101, pour the ultrafine copper powder to be surface modified and the quantitative modifier into the feeding tray 106. Pay attention to controlling the material loading amount to avoid exceeding two-thirds of the volume of the feeding tray 106 to prevent material overflow during subsequent vibration and stirring.

[0031] Sealing and locking: Cover the top cover 102 on top of the cylinder 101, rotate the top cover 102 clockwise to gradually tighten the external threaded cylinder 115 and the internal threaded cylinder 114 until the top cover 102 and the cylinder 101 are completely fitted together to ensure good sealing inside the device.

[0032] Start-up: Simultaneously start the drive motor 107 and the rotary motor 103. The drive motor 107 drives the drive shaft 108 to rotate. Through the transmission action of the drive wheel 111, the synchronous belt and the driven wheel 112, the driven shaft 109 is driven to rotate synchronously. The cams 110 on the drive shaft 108 and the driven shaft 109 rotate with the shaft. With the help of the eccentric structure of the cam 110, the feeding disc 106 is pushed to vibrate up and down along the inner wall of the cylinder 101. The vibration realizes the tumbling and initial dispersion of copper powder.

[0033] Stirring and coating: The rotary motor 103 drives the rotary shaft 104 and the stirring blade 105 to rotate, which shears and stirs the copper powder in the vibrating state, breaks up the copper powder agglomerates, and allows the modifier to fully contact each copper powder particle, thereby forming a uniform coating layer on the surface of the copper powder.

[0034] Operation completed: After the coating operation is completed, first turn off the rotary motor 103 and the drive motor 107. After the equipment has completely stopped running, rotate the top cover 102 counterclockwise to open the cylinder 101, take out the discharge tray 106, and collect the coated ultrafine copper powder. The entire coating process is now complete.

[0035] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A device for uniformly coating and modifying the surface of ultrafine copper powder, characterized in that, The device includes a cylindrical body (101) with a top cover (102) on top. A vibration assembly is provided in the lower section of the cylindrical body (101). A feeding tray (106) is provided at the output end of the vibration assembly. The feeding tray (106) is slidably disposed on the inner side wall of the cylindrical body (101). A stirring assembly is provided on the top cover (102). The vibration assembly includes a drive motor (107) disposed on the outer side wall of the cylindrical body (101). A drive shaft (108) extending into the cylindrical body (101) is provided at the output end of the drive motor (107). A driven shaft (109) is provided horizontally symmetrically with respect to the drive shaft (108) on the cylindrical body (101). A transmission kit is provided between the driven shaft (109) and the drive shaft (108). Two cams (110) are symmetrically disposed on the driven shaft (109) and the drive shaft (108). Multiple cams (110) lift the feeding tray (106).

2. The ultrafine copper powder surface modification and uniform coating device as described in claim 1, characterized in that, The transmission assembly includes a drive wheel (111) disposed on the drive shaft (108), a driven wheel (112) disposed on the driven shaft (109) at a position corresponding to the drive wheel (111), and a belt (113) sleeved on the drive wheel (111) and the driven wheel (112), and is driven by the belt (113).

3. The ultrafine copper powder surface modification and uniform coating device as described in claim 2, characterized in that, The stirring assembly includes a rotary motor (103) mounted on the top cover (102), and the output end of the rotary motor (103) is provided with a rotary shaft (104) extending into the discharge tray (106), and a plurality of stirring blades (105) are evenly arranged on the rotary shaft (104).

4. The ultrafine copper powder surface modification and uniform coating device as described in claim 3, characterized in that, An external threaded cylinder (115) is provided below the top cover (102), and an internal threaded cylinder (114) is provided above the cylinder body (101). The internal threaded cylinder (114) is threadedly connected to the external threaded cylinder (115) and is located inside the external threaded cylinder (115).

5. The ultrafine copper powder surface modification and uniform coating device as described in claim 4, characterized in that, The two ends of the drive shaft (108) and the driven shaft (109) are respectively rotatably mounted on the inner wall of the cylinder (101) via bearings.

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