Preparation device for silver-coated copper powder

Abstract

The utility model discloses a preparation device for silver-coated copper powder. The preparation device comprises a shell, a heating mechanism and a stirring mechanism, a sealing cover is arranged on the upper surface of the shell; the heating mechanism is arranged on the outer arc surface of the shell; the stirring mechanism comprises a limiting groove, teeth, a middle rotating rod, a middle gear, a side gear, a rotating sleeve, a supporting plate and a side rotating rod, the limiting groove is formed in the lower side face of the sealing cover, the teeth are evenly distributed on the inner arc face of the limiting groove, and the middle rotating rod is rotationally connected to the middle of the lower surface of the sealing cover; the outer arc face of the middle rotating rod is rotationally connected with a supporting plate through a rotating sleeve, rotating sleeves are arranged on the three corners of the supporting plate, the inner arc faces of the rotating sleeves on the three side edges are rotationally connected with side edge rotating rods correspondingly, side edge gears are arranged at the upper ends of the three side edge rotating rods correspondingly, and the three side edge gears are connected with a middle gear in a meshed mode. The preparation device for the silver coated copper powder has the advantages that the structure is reasonable, and the stirring effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of silver-coated copper powder, in particular to a preparation device for silver-coated copper powder. Background Art

[0002] Silver-coated copper powder is a composite powder material with a core-shell structure consisting of copper powder as the core and a silver layer as the outer layer. It has the excellent conductivity of both metallic silver and copper, while overcoming the shortcomings of pure copper powder being easily oxidized and silver powder being expensive. It is widely used as a conductive filler in electromagnetic films, conductive paints, conductive adhesives, conductive pastes, etc.

[0003] In industrial production, commonly used methods for preparing silver-coated copper powder include displacement, chemical reduction, and a combination of displacement and chemical reduction. The latter involves first plating silver on the copper powder surface, then reducing and depositing a silver salt on the copper powder surface. However, in actual production, the copper-silver ion displacement reaction is readily initiated as long as both metallic copper and silver ions are present in the solution. Therefore, the method of preparing silver-coated copper powder using metallic copper powder and a silver salt in an aqueous solution is essentially a combination of displacement and reduction.

[0004] Due to the influence of many factors such as the morphology, surface adsorption conditions, and differences in surface active points of metallic copper powder, it needs to be stirred in real time. However, the centrifugal stirring slurry has a poor effect. Therefore, we propose a preparation device for silver-coated copper powder. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a preparation device for silver-coated copper powder, which has good stirring effect and can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a device for preparing silver-coated copper powder, comprising a housing, a heating mechanism and a stirring mechanism;

[0007] Housing: The upper surface of which is provided with a cover;

[0008] Heating mechanism: It is arranged on the outer arc surface of the shell;

[0009] Stirring mechanism: It includes a limiting groove, teeth, a middle rotating rod, a middle gear, a side gear, a rotating sleeve, a support plate and a side rotating rod. The limiting groove is arranged on the lower side of the cover, and the inner arc surface of the limiting groove is provided with evenly distributed teeth. The middle part of the lower surface of the cover is rotatably connected to the middle rotating rod, and the outer arc surface of the middle rotating rod is rotatably connected to the support plate through the rotating sleeve. The triangle of the support plate is also provided with a rotating sleeve. The inner arc surfaces of the rotating sleeves on the three sides are respectively rotatably connected to the side rotating rods. The upper ends of the three side rotating rods are provided with side gears, and the three side gears are all meshed with a middle gear. The three side gears are all meshed with the teeth. The structure is reasonable and the stirring effect is good.

[0010] Furthermore, the stirring mechanism also includes stirring blades, which are respectively arranged at the lower end of a middle rotating rod and the lower ends of three side rotating rods to achieve the stirring function.

[0011] Furthermore, it also includes a single-chip microcomputer, which is arranged outside the device, and the input end of the single-chip microcomputer is electrically connected to the external power supply to regulate the normal operation of each electrical appliance.

[0012] Furthermore, it also includes a driving motor, which is arranged on the upper surface of the cover, and the output shaft of the driving motor is fixedly connected to the upper end of the middle rotating rod, and the input end of the driving motor is connected to the output end of the single chip microcomputer to realize the stirring drive function.

[0013] Furthermore, the heating mechanism also includes an interlayer, an oil change pipe, a heating rod and a temperature sensor. The interlayer is arranged on the lower side of the outer arc surface of the shell, the left side of the interlayer is provided with evenly distributed oil change pipes, the right side of the interlayer is provided with evenly distributed heating rods, and the left side of the outer arc surface of the shell is provided with a temperature sensor. The measuring end of the temperature sensor extends into the interior of the shell, the two oil change pipes are externally connected to the external oil supply pump, the input end of the heating rod is electrically connected to the output end of the single-chip microcomputer, and the temperature sensor is electrically connected to the single-chip microcomputer in both directions to realize the heating function.

[0014] Furthermore, it also includes a water outlet pipe, which is arranged on the bottom surface of the shell, and a micro filter element is provided in the water outlet pipe. The lower end of the water outlet pipe is connected to an external water pump, and a discharge pipe is provided in the middle of the bottom surface of the shell. The lower surface of the cover is fixedly connected to the water inlet pipe, and the lower side of the outer arc surface of the water inlet pipe is provided with evenly distributed sprinkler heads. The upper end of the water inlet pipe is connected to an external water supply equipment, and the upper surface of the cover is symmetrically provided with a first feed port and a second feed port to realize the functions of feeding and discharging.

[0015] Furthermore, it also includes a ventilation pipe, which is arranged on the upper right side of the outer arc surface of the shell. A pressure gauge is provided on the right side of the outer arc surface of the shell. The right end of the ventilation pipe is connected to an external air pump to realize the functions of air intake and air pressure regulation.

[0016] Furthermore, it also includes a pH sensor, which is arranged on the bottom surface of the shell. The pH sensor is bidirectionally electrically connected to the single-chip microcomputer to measure the pH value of the internal slurry.

[0017] Furthermore, it also includes reinforcing ribs, which are arranged on the outer arc surface of the interlayer, and the lower surface of the reinforcing ribs is fixedly connected to the bracket to achieve the supporting function.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the preparation device of the silver-coated copper powder has the following advantages:

[0019] When stirring operation is required, the single chip microcomputer is controlled to drive the motor to operate, and the output shaft of the drive motor rotates, and then rotates in the opposite direction through the three side gears, thereby driving the three side gears to rotate with the middle rotating rod as the center while rotating themselves. During this period, the limit groove, rotating sleeve and support plate support the three side gears, thereby driving the stirring blades to slowly stir the copper slurry. The stirring blades in the middle complete centrifugal stirring, and the stirring blades on the side will concentrate on the silver-coated copper powder in the middle to disperse it. The structure is reasonable and the stirring effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic cross-sectional view of the heating mechanism of the present invention;

[0022] Figure 3 This is a schematic cross-sectional view of the stirring mechanism of the present invention.

[0023] In the figure: 1 shell, 2 heating mechanism, 21 interlayer, 22 oil change pipe, 23 heating rod, 24 temperature sensor, 3 stirring mechanism, 31 limit groove, 32 teeth, 33 middle rotating rod, 34 middle gear, 35 side gear, 36 rotating sleeve, 37 support plate, 38 side rotating rod, 4 water outlet pipe, 5 discharge pipe, 6 pH sensor, 7 water inlet pipe, 8 observation window, 9 first feed port, 10 second feed port, 11 ventilation pipe, 12 pressure gauge, 13 drive motor, 14 reinforcing rib, 15 bracket, 16 single chip microcomputer. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-3 , this embodiment provides a technical solution: a preparation device for silver-coated copper powder, comprising a housing 1, a heating mechanism 2 and a stirring mechanism 3;

[0026] Shell 1: The upper surface thereof is provided with a cover, and also includes a single-chip microcomputer 16, which is arranged outside the device, and the input end of the single-chip microcomputer 16 is electrically connected to an external power supply, and also includes a water outlet pipe 4, which is arranged on the bottom surface of the shell 1, and a micro filter element is provided in the water outlet pipe 4. The lower end of the water outlet pipe 4 is externally connected to an external water pump, and a discharge pipe 5 is provided in the middle of the bottom surface of the shell 1. The lower surface of the cover is fixedly connected to a water inlet pipe 7, and the lower side of the outer arc surface of the water inlet pipe 7 is provided with evenly distributed sprinkler heads, and the upper end of the water inlet pipe 7 is externally connected to an external water supply device. The upper surface of the cover is symmetrically provided with a first feed port 9 and a second feed port 10, and also includes a ventilation pipe 11, which is provided on the upper right side of the outer arc surface of the shell 1. The outer arc of the shell 1 A pressure gauge 12 is provided on the right side of the surface, and the right end of the ventilation pipe 11 is connected to an external air pump. It also includes a pH sensor 6, which is arranged on the bottom surface of the shell 1. The pH sensor 6 is bidirectionally electrically connected to the single-chip microcomputer 16. It also includes a reinforcing rib 14, which is arranged on the outer arc surface of the interlayer 21. The lower surface of the reinforcing rib 14 is fixedly connected to a bracket 5. The device is placed on the designated workstation through the bracket 5. At this time, the pre-coated copper powder and the reducing solution are discharged into the interior of the shell 1 through the first feed port 9. At this time, the silver salt solution is introduced into the interior of the shell 1 through the second feed port 10. At this time, the single-chip microcomputer 16 and the pH sensor 6 can be controlled to operate, and the pH sensor 6 measures the pH value of the internal copper slurry in real time;

[0027] Heating mechanism 2: It is arranged on the outer arc surface of the shell 1. The heating mechanism 2 also includes an interlayer 21, an oil change pipe 22, a heating rod 23 and a temperature sensor 24. The interlayer 21 is arranged on the lower side of the outer arc surface of the shell 1. The left side of the interlayer 21 is provided with evenly distributed oil change pipes 22, the right side of the interlayer 21 is provided with evenly distributed heating rods 23, and the left side of the outer arc surface of the shell 1 is provided with a temperature sensor 24. The measuring end of the temperature sensor 24 extends into the interior of the shell 1. The two oil change pipes 22 are externally connected to the external oil supply pump. The input end of the heating rod 23 is electrically connected to the output end of the single-chip microcomputer 16. The temperature sensor 24 is bidirectionally electrically connected to the single-chip microcomputer 16;

[0028] Stirring mechanism 3: It includes a limiting groove 31, teeth 32, a middle rotating rod 33, a middle gear 34, a side gear 35, a rotating sleeve 36, a support plate 37 and a side rotating rod 38. The limiting groove 31 is set on the lower side of the cover. The inner arc surface of the limiting groove 31 is provided with evenly distributed teeth 32. The middle of the lower surface of the cover is rotatably connected to the middle rotating rod 33. The outer arc surface of the middle rotating rod 33 is rotatably connected to the support plate 37 through the rotating sleeve 36. The triangle of the support plate 37 is also provided with a rotating sleeve 36. The inner arc surfaces of the rotating sleeves 36 on the three sides are respectively rotatably connected to the side rotating rods 38. The upper ends of the three side rotating rods 38 are provided with side gears 35, the three side gears 35 are all meshed and connected with a middle gear 34, and the three side gears 35 are all meshed and connected with the teeth 32. The stirring mechanism 3 also includes stirring blades, which are respectively arranged at the lower end of a middle rotating rod 33 and the lower ends of the three side rotating rods 38, and also includes a driving motor 13. The driving motor 13 is arranged on the upper surface of the cover, and the output shaft of the driving motor 13 is fixedly connected to the upper end of the middle rotating rod 33. The input end of the driving motor 13 is the output end of the single-chip microcomputer 16. At this time, the single-chip microcomputer 16 can be controlled to drive the motor 13 to run, and the output shaft of the driving motor 13 rotates, thereby The side gear 35 rotates in the opposite direction, thereby driving the three side gears 35 to rotate around the middle rotating rod 33 while rotating itself. During this period, the limiting groove 31, the rotating sleeve 36 and the supporting plate 37 support the three side gears 35, thereby driving the stirring piece to slowly stir the copper slurry, so that the copper slurry undergoes a neutralization reaction in real time. After the neutralization reaction is completed, the external air pump is regulated, and nitrogen is ventilated through the ventilation pipe 11. At this time, the pressure gauge is observed and the air pressure in the pressure gauge is 0.5 MPa. The external water pump is regulated to discharge the mother liquor from the inside of the shell 1 through the outlet pipe 4. At this time, the external water pump is regulated, and ionized water passes through the inlet Deionized water is discharged from the water pipe 7 and the sprinkler head to clean the silver-coated copper powder. At this time, the single-chip microcomputer 16 is regulated, the stirring blades stir at high speed, and the stirring blades on the side complete centrifugal stirring. The stirring blades on the side will break up the silver-coated copper powder concentrated in the middle. After stirring is completed, the cleaned ionized water is discharged through the outlet pipe 4. The silver-coated copper powder is retained in the interior of the outer shell 1 through the micro filter element, and then repeatedly cleaned until the pH sensor 6 tests the pH of the cleaning liquid to be 7. The cleaning process is completed and the cleaning liquid is discharged. At this time, silver-coated copper powder with a water content of less than 10% is obtained. At this time, the external suction pump is regulated to discharge these silver-coated copper powders through the discharge pipe 5.

[0029] The working principle of a preparation device of silver-coated copper powder provided by the present invention is as follows: the device is placed on a designated work station through a bracket 5. At this time, the pre-coated copper powder and the reducing liquid are discharged into the interior of the shell 1 through the first feed port 9. At this time, the silver salt solution enters the interior of the shell 1 through the second feed port 10. At this time, the single-chip microcomputer 16 and the pH sensor 6 can be regulated to operate. The pH sensor 6 measures the pH value of the internal copper slurry in real time. At this time, the external oil pump is turned on and the temperature-changing oil is added to the interior of the interlayer 21 through the oil change pipe 22. At this time, the single-chip microcomputer 16 and the heating rod 23 are regulated to operate. The heating rod 23 heats the temperature of the exchange oil and transmits these temperatures to the interior of the shell 1. The single-chip microcomputer 16 and the temperature sensor 24 measure the temperature inside the shell 1 in real time. At this time, the single-chip microcomputer 16 can be regulated to operate, the output shaft of the drive motor 13 rotates, and then rotates in the opposite direction through the three side gears 35, thereby driving the three side gears 35 to rotate with the middle rotating rod 33 as the center while rotating themselves. During this period, the limit The position slot 31, the rotating sleeve 36 and the supporting plate 37 support the three side gears 35, which in turn drive the stirring piece to slowly stir the copper slurry, so that the copper slurry undergoes a neutralization reaction in real time. After the neutralization reaction is completed, the external air pump is regulated, and nitrogen is ventilated through the ventilation pipe 11. At this time, the pressure gauge is observed and the air pressure in the pressure gauge is 0.5 MPa. The external water pump is regulated to discharge the mother liquor from the inside of the shell 1 through the water outlet pipe 4. At this time, the external water pump is regulated, and ionized water is discharged into the ionized water through the water inlet pipe 7 and the spray head to clean the silver-coated copper powder. At this time, the single The stirring blades of the sheet machine 16 stir at high speed, the stirring blades in the middle complete centrifugal stirring, and the stirring blades on the side break up the silver-coated copper powder concentrated in the middle. After stirring, the cleaned ionized water is discharged through the outlet pipe 4. The silver-coated copper powder is retained in the interior of the housing 1 by the micro filter element, and then repeatedly cleaned until the pH sensor 6 tests the pH of the cleaning liquid to be 7. The cleaning process is completed and the cleaning liquid is discharged. At this time, silver-coated copper powder with a water content of less than 10% is obtained. At this time, the external suction pump is adjusted to discharge the silver-coated copper powder through the discharge pipe 5.

[0030] It is worth noting that the single-chip microcomputer 16 disclosed in the above embodiment is specifically model S7-200, and the heating rod 23, temperature sensor 24, pH sensor 6 and drive motor 13 can be freely configured according to the actual application scenario. It is recommended to use WRN230 stainless steel K-type thermocouple electric heating rod for the heating rod 23, MD-T270G-GPRS wireless temperature transmitter / sensor for the temperature sensor 24, SM2123M model pH sensor for the pH sensor 6, and SG080 planetary gear reducer for the drive motor 13. The single-chip microcomputer 16 controls the operation of the heating rod 23, temperature sensor 24, pH sensor 6 and drive motor 13 using methods commonly used in the prior art.

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for preparing silver-coated copper powder, characterized in that: It comprises a housing (1), a heating mechanism (2) and a stirring mechanism (3); Housing (1): having a cover on its upper surface; Heating mechanism (2): arranged on the outer arc surface of the housing (1); Stirring mechanism (3): It includes a limiting groove (31), teeth (32), a middle rotating rod (33), a middle gear (34), a side gear (35), a rotating sleeve (36), a support plate (37) and a side rotating rod (38), wherein the limiting groove (31) is provided on the lower side of the cover, and the inner arc surface of the limiting groove (31) is provided with teeth (32) evenly distributed. The middle of the lower surface of the cover is rotatably connected to the middle rotating rod (33), and the middle rotating rod (33) The outer arc surface is rotatably connected to the support plate (37) through a rotating sleeve (36), and the triangle of the support plate (37) is also provided with a rotating sleeve (36). The inner arc surfaces of the rotating sleeves (36) on the three sides are respectively rotatably connected to the side rotating rods (38). The upper ends of the three side rotating rods (38) are provided with side gears (35), and the three side gears (35) are all meshed with a middle gear (34). The three side gears (35) are all meshed with the teeth (32).

2. The device for preparing silver-coated copper powder according to claim 1, wherein: The stirring mechanism (3) further comprises stirring blades, which are respectively arranged at the lower end of a middle rotating rod (33) and the lower ends of three side rotating rods (38).

3. The device for preparing silver-coated copper powder according to claim 1, wherein: It also includes a single-chip microcomputer (16), which is arranged outside the device, and an input end of the single-chip microcomputer (16) is electrically connected to an external power supply.

4. The device for preparing silver-coated copper powder according to claim 3, wherein: It also includes a drive motor (13), which is arranged on the upper surface of the cover, and the output shaft of the drive motor (13) is fixedly connected to the upper end of the middle rotating rod (33), and the input end of the drive motor (13) is the output end of the single chip microcomputer (16).

5. The device for preparing silver-coated copper powder according to claim 2, wherein: The heating mechanism (2) further comprises an interlayer (21), an oil change pipe (22), a heating rod (23) and a temperature sensor (24), wherein the interlayer (21) is arranged on the lower side of the outer arc surface of the housing (1), the left side of the interlayer (21) is provided with evenly distributed oil change pipes (22), the right side of the interlayer (21) is provided with evenly distributed heating rods (23), the left side of the outer arc surface of the housing (1) is provided with a temperature sensor (24), the measuring end of the temperature sensor (24) extends into the interior of the housing (1), the two oil change pipes (22) are externally connected to an external oil supply pump, the input end of the heating rod (23) is electrically connected to the output end of the single-chip microcomputer (16), and the temperature sensor (24) is bidirectionally electrically connected to the single-chip microcomputer (16).

6. The device for preparing silver-coated copper powder according to claim 1, characterized in that: The invention also includes a water outlet pipe (4), which is arranged on the bottom surface of the shell (1), a micro filter element is provided in the water outlet pipe (4), the lower end of the water outlet pipe (4) is externally connected to an external water pump, a discharge pipe (5) is provided in the middle of the bottom surface of the shell (1), the lower surface of the cover is fixedly connected to the water inlet pipe (7), the lower side of the outer arc surface of the water inlet pipe (7) is provided with evenly distributed spray heads, the upper end of the water inlet pipe (7) is externally connected to an external water supply device, and the upper surface of the cover is symmetrically provided with a first feed port (9) and a second feed port (10).

7. The device for preparing silver-coated copper powder according to claim 1, characterized in that: It also includes a ventilation pipe (11), which is arranged on the upper right side of the outer arc surface of the shell (1). A pressure gauge (12) is provided on the right side of the outer arc surface of the shell (1), and the right end of the ventilation pipe (11) is connected to an external air pump.

8. The device for preparing silver-coated copper powder according to claim 2, wherein: It also includes a pH sensor (6), which is arranged on the bottom surface of the housing (1), and the pH sensor (6) is bidirectionally electrically connected to the single-chip computer (16).

9. The device for preparing silver-coated copper powder according to claim 5, characterized in that: It also includes a reinforcing rib (14), which is arranged on the outer arc surface of the interlayer (21), and the lower surface of the reinforcing rib (14) is fixedly connected to a bracket (15).

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