A small powder barrel plating device for laboratory

Abstract

The application discloses a small powder barrel plating device for laboratory. It belongs to the technical field of electroplating. The device comprises an electroplating tank, an ultrasonic oscillation heating device, an adjustable speed motor, a power supply and a roller. The powder electroplating tank comprises a tank body and a movable anode. The ultrasonic oscillation heating device comprises an ultrasonic oscillation device and a water bath constant temperature heating system. The ultrasonic oscillation heating device is connected with the electroplating tank through a spring, so that the electroplating tank is stably stored in the ultrasonic oscillation heating device. The adjustable speed motor is composed of a motor, a gear reducer and a synchronous wheel transmission belt. The process comprises pretreatment and barrel plating. The application designs a small powder barrel plating device for laboratory and a process. Around the problem that powder is difficult to be electroplated, a small laboratory powder barrel plating device with adjustable barrel plating temperature, roller rotating speed and anode-cathode distance is designed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electroplating, and relates to a small powder barrel plating device for laboratory use. BACKGROUND

[0002] Metal powder belongs to loose material, and its performance comprehensively reflects the properties of the metal itself, the properties of single particles and the characteristics of particle groups. Since the 1970s, various gas phase and liquid phase physical and chemical reaction methods have appeared to prepare powders and ultrafine powders with important uses. Metal composite powder can improve or change the internal structure or surface defects of single metal powder, and has a great driving effect in the fields of conductive fillers, conductive inks, antibacterial materials, rubber, catalysts and the like. At present, many countries such as the United States, South Korea and Japan have carried out more research on metal composite powder, and the specific methods include mechanical ball milling, melt atomization and chemical plating, but there is less research on the preparation of metal composite powder by electroplating. It is very meaningful to invent a small powder barrel plating device around this problem.

[0003] Electroplating is divided into hanging plating, barrel plating and brush plating, and the use method is mainly related to the size and quantity of the plated sample. Hanging plating is suitable for general size products, such as automobile bumpers and bicycle handlebars. Barrel plating is suitable for small parts such as fasteners, gaskets and pins. Continuous plating is suitable for batch production of wires and strips. Brush plating is suitable for local plating or repair. Regardless of the plating method, the plating tank, hanger and the like in contact with the plated product and the plating solution should have a certain degree of universality. Around the characteristics of small volume and large quantity of powder, the barrel plating method is very suitable. Barrel plating is strictly speaking called barrel electroplating. It is a kind of electroplating processing method in which a certain number of small parts are placed in a special barrel, and various metal or alloy coatings are deposited on the surface of the parts in an indirect conductive manner in a rolling state, so as to achieve the purpose of surface protection, decoration and various functions.

[0004] At present, the powder barrel plating device has few adjustable parameters and is rarely suitable for laboratory use. SUMMARY

[0005] The purpose of the application is to simulate the environment of powder electroplating in a beaker, thereby providing a small powder barrel plating device for laboratory use, which can adjust the barrel plating temperature, barrel rotation speed and anode-cathode distance.

[0006] Technical scheme: The small powder barrel plating device for laboratory use comprises a base plate, a speed regulator, a three-phase asynchronous motor, a barrel and an ultrasonic vibration heating device arranged on the base plate.

[0007] At least four line holes are arranged on the speed regulator and the three-phase asynchronous motor, and wired lines connecting the speed regulator and the three-phase asynchronous motor are arranged in the four line holes.

[0008] A plating solution tank for placing the roller is arranged outside the roller, and the plating solution tank is arranged in the inner cavity of the ultrasonic oscillation heating device.

[0009] The ultrasonic oscillation heating device is arranged on the other side of the speed regulator and the three-phase asynchronous motor.

[0010] An input pulley is connected to the motor output shaft of the three-phase asynchronous motor through a C-shaped key.

[0011] A working shaft is arranged inside the roller, a needle bearing is connected to one end of the working shaft, a fixed angular contact bearing is connected to the other end of the needle bearing, and an output end shaft sleeve is connected to the other end of the fixed angular contact bearing.

[0012] An output pulley is connected to one end of the output end shaft sleeve close to the three-phase asynchronous motor, and a deep groove ball bearing is arranged on the other side of the output pulley.

[0013] A coaxial transmission belt is movably arranged on the input pulley and the output pulley.

[0014] A movable anode is arranged inside the plating solution tank.

[0015] A power supply device is arranged on the other side of the ultrasonic oscillation heating device, and two power supplies are arranged on the outer wall of the power supply device.

[0016] One of the power supplies is connected to the needle bearing through the arranged wired line.

[0017] The wall of the roller has no small holes, and the roller has openings at both ends.

[0018] Further, a bolt hole is arranged on the base of the three-phase asynchronous motor, a screw hole is arranged on the base plate and matched with the bolt hole, and a clamping screw for fixing the three-phase asynchronous motor and the base plate is arranged in the bolt hole and the screw hole.

[0019] Further, a notch is arranged on the plating solution tank.

[0020] Beneficial effects: compared with the prior art, the application has the following characteristics: 1, taking copper powder barrel plating nickel as an example, the copper powder of 200 meshes is sieved and placed in 10% hydrochloric acid for 30 minutes, and then ultrasonic cleaning for 5 minutes. The method of pretreatment can not only remove the copper oxide which has adverse effect on the surface conductivity of copper powder, but also activate the copper powder to facilitate the barrel plating; 2, the conventional barrel wall plate is covered with many small holes, the conduction of current between the part and the anode, the update of the solution inside and outside the barrel and the exhaust of waste gas all need to pass through these small holes during electroplating, but this also makes the powder flow out of the small holes during barrel plating, which has adverse effect on the barrel plating of the powder; 3, due to the design of external anode, the size and dimension of the anode will not be limited by the size of the barrel, and the electroplating efficiency is improved; 4, since the anode can move forward and backward, the distance between the anode and the cathode can be adjusted, and the plating environment of the powder in the device is improved; 5, the plated powder is limited in the barrel, considering that the powder will be affected by the water flow when the stirrer stirs, which affects the plating, the ultrasonic oscillation is used to reduce the agglomeration of the powder and also accelerate the update of the solution inside and outside the barrel; 6, the cathode of the conventional barrel is generally a long strip, and the parts are pressed on the cathode conductive device in the barrel during barrel plating, only a small part of the parts is directly connected with the cathode conductive device, and most of the parts can only be connected with the cathode through the stacked parts. The barrel of the application adopts a full metal structure, which is equivalent to the whole as a cathode, greatly improves the conductive area, increases the conductive strength, and enhances the barrel plating efficiency; 7, the ultrasonic oscillation heating device can be heated by water bath, and the barrel plating of the metal with temperature conditions can also be carried out; 8, the barrel of the application is connected with a variable speed motor, the rotating speed of the barrel can be adjusted, so as to control the deposition efficiency of the plating layer on the surface of the powder; 9, any powder with good conductivity can be barrel plated by the device; 10, the device has the characteristics of miniaturization, and can be made by the laboratory itself. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the structure diagram of the application Figure One ;

[0022] Figure 2 is the structure diagram of the application Figure Two ;

[0023] In the figure, 1 is a speed regulator, 2 is a three-phase asynchronous motor, 3 is a barrel, 4 is a coaxial transmission belt, 5 is a movable anode, 6 is an ultrasonic oscillation heating device, 7 is a cathode, 8 is a spring, 9 is a power supply, 10 is a set screw, 11 is a base plate, 12 is an input pulley, 14 is an output pulley, 15 is a working shaft, 16 is an output end shaft sleeve, 17 is a deep groove ball bearing, 18 is a fixed angular contact bearing, 19 is a plating solution tank and 20 is a needle roller bearing. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions of the present application, the technical solutions of the present application will be further described in detail below with reference to the accompanying drawings:

[0025] As shown in the figure, the small powder barrel plating device for laboratory, the three-phase asynchronous motor 2 is fixed on the base plate 11 through the set screw 10, the input pulley 12 is connected to the motor output shaft of the three-phase asynchronous motor 2 through the C-shaped key, the torque of the input pulley 12 is transmitted to the output pulley 14 through the belt 13, the output pulley 14 connected to the shaft section of the working shaft 15 drives the working shaft 15 to rotate through the C-shaped key, the right end of the output pulley 14 is in contact with the output end shaft sleeve 16, and the left end is in contact with the deep groove ball bearing 17, so that the axial fixing of the output pulley 14 is realized.

[0026] The input end and the output end of the working shaft 15 are both designed with two shaft shoulders for single-sided axial positioning of the two end fixed angular contact bearings 18, and the other side shaft sleeve 16 realizes the fixation of the inner ring of the fixed angular contact bearing 18, and the outer ring of the fixed angular contact bearing 18 is fixed in the plating solution tank 19, specifically referring to the size of the bearing seat fixed angular contact bearing outer ring.

[0027] The working shaft 15 is fixed in the circumferential direction through the connection with the two end fixed angular contact bearings 18, so as to ensure that the working shaft 15 jumps within the calculation error in each rotation, and the inner wall surface of the working shaft 15 and the input end and the output end pulley 14 are matched to ensure that the axial movement of the working crankshaft 15 in the working process is within the calculation error.

[0028] The roller bearing 20 is fixed as a cathode on the working shaft 1, and the roller 3 is welded on the working shaft 15, which drives the roller 3 to rotate when the working shaft 15 rotates. At this time, the output torque of the three-phase asynchronous motor is transmitted to the roller 3. EMBODIMENT

[0029] In combination with the drawings, the powder barrel plating device of the present application comprises an electroplating tank, an ultrasonic oscillation heating device, a variable speed motor, a power supply and a roller.

[0030] In implementation, the electroplating tank is connected with the ultrasonic oscillation heating device through a spring, so that the electroplating tank is stably stored in the ultrasonic oscillation heating device.

[0031] In implementation, the powder is limited inside the roller, so there is no need to worry that the powder will be affected by the water flow when the ultrasonic oscillation is used, which will affect the plating. In addition, the use of ultrasonic oscillation not only reduces the agglomeration of the powder, but also speeds up the renewal of the solution inside and outside the roller.

[0032] In implementation, a groove for storing anode plates is provided on the wall of the electroplating tank, providing a movable environment for the anode.

[0033] In the implementation, the drum of the all-metal structure, equivalent to the whole as a cathode, increases the conductive area, increases the conductive strength, and enhances the barrel plating efficiency.

[0034] In the implementation, the design of the external anode, the size and size of the anode will not be limited by the size of the drum, and the electroplating efficiency is improved.

[0035] In the implementation, the ultrasonic oscillation heating device is water-bathed, the electroplating temperature is improved, the electroplating efficiency is improved, and the electroplating effect is enhanced.

[0036] In the implementation, the drum is connected to the variable speed motor, and the powder surface coating deposition efficiency is controlled by adjusting the drum rotation speed.

[0037] Taking copper powder plating nickel as an example, the specific steps are as follows:

[0038] 1. Pretreatment: screen 200 mesh copper powder in 10% hydrochloric acid for 30 minutes, treat surface copper oxide, and then ultrasonic cleaning for 5 minutes.

[0039] 2. Preheating: heat the electroplating tank to the required temperature of barrel plating by the ultrasonic oscillation heating device.

[0040] 3. Pre-plating: pre-plating of powder before long-term and large-scale plating, and pre-estimating the growth efficiency of electroplating layer.

[0041] 4. Barrel plating: the drum is connected to the adjustable speed motor, and the speed of the adjustable speed motor can be calculated according to the required electroplating time.

[0042] Many metal powders can be selected for the device, including copper, nickel, silver and other powders. The single metal for barrel plating is also many, including copper, nickel, silver and other powders. Taking copper powder electroplating nickel as an example. The plating nickel liquid formula is NiSO4·6H2O: 150-200g / L, NiCl2·6H2O: 30-70g / L, H3BO3: 30-50g / L, C 12 H 25 SO4Na: 0.05-0.1g / L, PH: 4-5, temperature: 40-50℃. The distance between anode and cathode is 2-5cm, the electroplating time is 30-60min, and the current size is 0.6-1A / dm 2 .

[0043] After electroplating, the nickel-plated copper powder is taken out from the drum, washed, dried and put into a sample bag. The obtained nickel-plated carbon fiber is collected through a simple concentrator; the nickel coating is observed by scanning electron microscope, and it is found that the nickel coating is fine and uniform, and the copper powder is well coated.

Claims

1. A small-scale powder barrel plating apparatus for laboratory use, characterized in that, Includes a base plate (11), on which a speed regulator (1), a three-phase asynchronous motor (2), a drum (3), and an ultrasonic vibration heating device (6) are arranged and mounted. At least four wiring holes are provided on the speed controller (1) and the three-phase asynchronous motor (2) which are close to each other, and wired lines connecting the speed controller (1) and the three-phase asynchronous motor (2) are installed in the four wiring holes. A plating bath (19) for placing the roller (3) is installed on the outside of the roller (3), and the plating bath (19) is placed in the inner cavity of the ultrasonic vibration heating device (6); The ultrasonic vibration heating device (6) is located on the other side of the speed regulator (1) and the three-phase asynchronous motor (2); An input pulley (12) is connected to the output shaft of the three-phase asynchronous motor (2) via a C-type key. A working shaft (15) is arranged inside the drum (3). A needle roller bearing (20) is connected to one end of the working shaft (15), a fixed angular contact bearing (18) is connected to the other end of the needle roller bearing (20), and an output end bushing (16) is connected to the other end of the fixed angular contact bearing (18). An output pulley (14) is connected to one end of the output end bushing (16) near the three-phase asynchronous motor (2), and a deep groove ball bearing (17) is installed on the other side of the output pulley (14). A coaxial transmission belt (4) is movably mounted on the input pulley (12) and the output pulley (14). A movable anode (5) is installed inside the plating bath (19); A power supply device is installed on the other side of the ultrasonic vibration heating device (6), and two power supplies (9) are installed on the outer wall of the power supply device. One power source is connected to the needle roller bearing (20) via a wired connection; the other power source is connected to the movable anode (5) via a wired connection. The wall panel of the roller (3) has no small holes, and the two ends of the roller (3) are open.

2. The laboratory-grade small-scale powder barrel plating apparatus according to claim 1, characterized in that, Bolt holes are provided on the base of the three-phase asynchronous motor (2), and screw holes adapted to the bolt holes are provided on the base plate (11). Set screws (10) for fixing the three-phase asynchronous motor (2) and the base plate (11) are placed in the bolt holes and screw holes.

3. The laboratory-grade small-scale powder barrel plating apparatus according to claim 1, characterized in that, A notch is provided on the plating tank (19).

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