Continuous crushing mechanism for copper powder

Abstract

The utility model relates to the technical field of powder metallurgy, in particular to a continuous copper powder crushing mechanism which comprises a conveying belt, a first crushing device used for crushing a copper powder cake into copper powder particles is installed above the conveying end of the conveying belt, the first crushing device comprises a first compression roller, and a row of first crushing teeth are spirally distributed on the periphery of the first compression roller. And a second crushing device for crushing the copper powder particles into copper powder is mounted below the output end of the conveyor belt. Compared with the prior art, the first crushing mechanism is arranged to conduct front crushing on the second crushing mechanism, and the technical problems that according to an existing crushing mode, the crushing period is long, the particle size of a final finished product can meet the requirement only by conducting repeated concentrated crushing for multiple times, and time and energy are consumed are solved.

Description

Technical Field

[0001] The utility model patent relates to the technical field of powder metallurgy, specifically a continuous crushing mechanism for copper powder. Background Art

[0002] Copper powder has excellent thermal and electrical conductivity, as well as good corrosion resistance and mechanical properties. It is widely used in the field of powder metallurgy. During the preparation process, copper powder needs to undergo high-temperature oxidation, reduction, crushing, and screening to obtain copper powder. The reduced copper powder hardens into a copper powder cake, which needs to be crushed before entering the next step of packaging.

[0003] Crushing is one of the core links in copper powder production. In the crushing stage, the dried material needs to be crushed. Usually, mechanical crushing is adopted, and the material is put into a crusher for grinding until the required particle size is reached. The usual copper powder crushing device, such as the Chinese patent "A reduction copper powder crushing device" (patent number ZL201721901882.4, published on September 28, 2018) records the following structure: The utility model discloses a reduction copper powder crushing device in the field of powder metallurgy technology. The reduced copper powder crushing device includes a frame, an upper first pressing roller and a lower first pressing roller arranged up and down on the frame, and a driving mechanism for driving the upper and lower first pressing rollers to rotate; the upper and lower first pressing rollers are covered with a plurality of first crushing teeth for crushing the reduced copper powder, and the first crushing teeth are regular tetrahedrons; the driving mechanism includes a motor arranged on the frame, the motor drives a driving sprocket through a reduction box, a driven sprocket is arranged at one end of the lower first pressing roller, the driving sprocket drives the driven sprocket through a first chain, a first gear is arranged at the other end of the lower first pressing roller, meshing with a second gear arranged at the same side end of the frame, the second gear is coaxially provided with a first sprocket, and the first sprocket drives a second sprocket arranged at the same side end of the upper first pressing roller through a second chain.

[0004] In the prior art, the utility model extrude and crush the powder cake by rotating the upper and lower first pressing rollers, and under the action of the first crushing teeth, the powder cake is crushed into copper powder with uniform particles. However, this crushing device has the following technical defects during actual use: the crushing cycle of this crushing method is relatively long, and multiple repeated concentrated crushings are required to make the final product particle size meet the requirements. Therefore, in order to solve the above defects, this scheme proposes a continuous crushing mechanism for copper powder. Utility Model Content

[0005] The utility model aims to provide a continuous crushing mechanism for copper powder, which is mainly used to solve the technical problems of the existing crushing method, that is, the crushing time is long, and multiple repeated concentrated crushing is required to make the final product particle size meet the requirements, which is time-consuming and energy-consuming.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A continuous crushing mechanism for copper powder comprises a conveyor belt, wherein a first crushing device for crushing copper powder cakes into copper powder particles is installed above the conveying end of the conveyor belt, the first crushing device comprises a first pressing roller which can rotate with an axis as a reference axis, a row of first crushing teeth are spirally distributed around the first pressing roller, and a second crushing device for crushing copper powder particles into copper powder is installed below the conveying end of the conveyor belt.

[0008] The working principle and beneficial effects of the utility model:

[0009] (1) After the reduced powder cake is conveyed to the continuous crushing mechanism by the conveyor belt, it passes through the first crushing device first, and the first pressure roller on the first crushing device starts to rotate, driving the first crushing teeth on the first pressure roller to start rotating and contacting the copper powder cake. Under high-speed rotation, the copper powder cake in contact with the first crushing teeth is crushed into particles. Compared with the prior art, the special feature of this scheme is that two crushing procedures are designed, and the purpose of the first crushing procedure is to decompose the whole copper powder cake into copper powder particles, so that the subsequent second crushing device (the function includes the function of the conventional crushing device in the prior art) can grind the copper powder particles. Because compared with the prior art, the material processed by the second crushing mechanism at the beginning is not a complete copper powder cake with a certain hardness, but copper powder particles that have been decomposed, so the time for the second crushing device to grind the material is reduced, and there is no need to grind the material repeatedly many times, and at the same time, the burden of the second crushing device on grinding the material is also reduced. Compared with the prior art, the whole process achieves the purpose of saving time and energy, and solves the technical problems of the prior art that the crushing time is long, and multiple repeated concentrated crushing is required to make the final finished product particle size meet the requirements, which is time-consuming and energy-consuming.

[0010] (2) The entire row of first crushing teeth is wound around the first pressing roller in an "S" shape, ensuring that all the first crushing teeth are staggered. Each time the first pressing roller rotates by a fixed angle, only one first crushing tooth contacts the copper powder cake, and the torque applied by the motor to the first pressing roller to drive the first pressing roller to rotate only acts on one crushing tooth each time, thereby maximizing the crushing force of a single crushing tooth, thereby maximizing energy utilization efficiency and reducing energy loss.

[0011] Preferably, the distance between the first pressing roller and the conveyor belt is smaller than the thickness of the powder cake. The design of this solution is that when the copper powder cake is being conveyed forward along the conveyor belt, the copper powder cake as a whole will be stuck between the first pressing roller and the conveyor belt and will be in close contact with the first pressing roller. Only when the first pressing roller rotates can the first crushing teeth crush the copper powder cake.

[0012] Preferably, the second crushing device includes a shell, and the inside of the shell includes two second pressing rollers with axes parallel to each other and rotatable as reference axes, and the two second pressing rollers rotate in opposite directions, and a plurality of second crushing teeth are evenly distributed on the second pressing rollers, and the crushing teeth on the two second pressing rollers can mesh with each other when rotating. The second pressing rollers and the second crushing teeth are arranged to further crush and grind the copper powder particles obtained by the first crushing device, and crush the copper powder obtained by grinding.

[0013] Preferably, a mesh plate with a plurality of mesh holes is arranged inside the housing and below the second pressing roller. The mesh plate is arranged to screen the copper powder crushed by the second crushing device and separate the metal powder with larger particles.

[0014] Preferably, the mesh plate includes a first end and a second end which are relatively arranged and fixed on the inner wall of the shell, the first end is located higher than the second end, and the shell is provided with a discharge port at the second end, and the discharge port is connected to a discharge pipe. The coarser particles screened by the mesh plate are discharged along the mesh plate to the discharge port and discharged through the discharge pipe, so as to prevent the copper powder with larger particle size from entering the next process and affecting the quality of the finished product.

[0015] Preferably, a vibrator is installed at the bottom of the first end of the mesh plate. The purpose of the vibrator is to make the copper powder particles with larger particle size and not completely crushed on the mesh plate slide out of the discharge port more efficiently along the mesh plate. At the same time, the setting of the vibrator can also prevent the larger particles of the material that have not been ground into powder from clogging the sieve holes on the mesh plate.

[0016] Preferably, the end of the discharge pipe away from the discharge port is connected to a screw feeder, and the discharge port of the screw feeder is connected to a feed pipe. The end of the feed pipe away from the screw feeder is connected to the internal space of the shell and is located above the second pressure roller and conveys materials to the inside of the shell. The screw feeder conveys the copper powder particles with larger particle sizes collected in the storage box to the feed pipe, and then conveys them to the inside of the shell through the feed pipe, so that the second pressure roller and the second crushing teeth further grind the copper powder particles with coarse particle sizes. This solution supplements the production process of copper powder to ensure that the obtained copper powder has a uniform particle size and meets the requirements.

[0017] Preferably, a curved baffle is fixedly installed on one side of the upper end of the shell away from the conveyor belt, the concave surface of the curved baffle faces the first pressing roller, and vertical baffles are fixedly installed on both sides of the upper end of the shell adjacent to the conveyor belt, and one end of the vertical baffle away from the shell is fixedly connected to the curved baffle. The curved baffle and the vertical baffle together form a containment structure to prevent the first pressing roller from causing the crushed copper powder particles to splash around during the process of rotating and crushing the copper powder cake, causing material loss.

[0018] Preferably, the end of the discharge pipe away from the discharge port is connected to a non-porous cloth pipe made of non-woven fabric, and the end of the cloth pipe away from the discharge pipe is fixedly connected to the feed port of the screw feeder. When the vibrator is working, it will vibrate with the housing and the discharge pipe. The arrangement of the cloth pipe is to prevent the vibration of the discharge pipe from being transmitted to the screw feeder and interfering with the operation of the screw feeder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of a continuous crushing mechanism for copper powder in the utility model patent;

[0020] Figure 2 This is a three-dimensional structural diagram of a continuous crushing mechanism for copper powder in the utility model patent;

[0021] Figure 3 It is a top view of a continuous crushing mechanism of copper powder in the utility model patent;

[0022] Figure 4 This utility model patent is a continuous crushing mechanism for copper powder Figure 3 AA section view;

[0023] Figure 5 This is a structural diagram of the first pressing roller of a continuous crushing mechanism for copper powder of the utility model patent;

[0024] Figure 6 This is a structural diagram of the second pressing roller of a continuous crushing mechanism for copper powder of the utility model patent;

[0025] The figure marks in the drawings of the specification include: conveyor belt 1, first pressure roller 21, first crushing tooth 22, shell 31, second pressure roller 321, second crushing tooth 322, mesh plate 33, vibrator 34, discharge port 35, arc baffle 36, vertical baffle 37, discharge pipe 41, screw feeder 42, feed pipe 43, cloth pipe 5. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] This device is mainly used for crushing the copper powder cake after treatment in the reduction furnace. The conventional crushing device in this field only sets up a crushing device, and then repeatedly passes the copper powder cake through the crushing device for repeated crushing until the particle size of the crushed metal powder is uniform. However, this crushing method takes a long time to crush, and requires repeated concentrated crushing to make the final product particle size meet the requirements. Therefore, in order to solve the above defects, this scheme proposes a continuous crushing mechanism for copper powder.

[0028] like Figure 1-6 As shown, a continuous crushing mechanism for copper powder includes a conveyor belt 1, and a first crushing device for crushing copper powder cakes into copper powder particles is installed above the conveying end of the conveyor belt 1. The first crushing device includes a first pressing roller 21 driven by a motor and rotatable with the axis as a reference axis. A row of first crushing teeth 22 are spirally distributed around the first pressing roller 21, and the entire row of first crushing teeth 22 is wound around the first pressing roller 21 in an "S" shape, ensuring that all the first crushing teeth 22 are staggered. Each time the first pressing roller 21 rotates a fixed angle, only one first crushing tooth 22 contacts the copper powder cake, and the torque applied by the motor to the first pressing roller 21 to drive the first pressing roller 21 to rotate only acts on one crushing tooth each time, so that the crushing force of a single crushing tooth is maximized; at the same time, the distance between the first pressing roller 21 and the conveyor belt 1 is smaller than the thickness of the powder cake, so that the copper powder cake cannot pass through the gap between the first pressing roller 21 and the conveyor belt 1 without being crushed during the conveying process of the conveyor belt 1.

[0029] like Figure 4 , Figure 6 As shown, a second crushing device for crushing copper powder particles into copper powder is installed below the output end of the conveyor belt 1. The second crushing device includes a housing 31. The housing 31 includes two second pressing rollers 321 with axes parallel to each other and driven by a motor, which can rotate with the axis as a reference axis. The two second pressing rollers 321 rotate in opposite directions. A plurality of second crushing teeth 322 are evenly distributed on the second pressing rollers 321. The crushing teeth on the two second pressing rollers 321 mesh with each other in the rotating state. The second pressing rollers 321 and the second crushing teeth 322 are arranged to further crush and grind the copper powder particles obtained by the first crushing device, and crush the copper powder obtained by grinding.

[0030] like Figure 2 , Figure 4As shown, a mesh plate 33 with a plurality of sieve holes is provided inside the housing 31 and below the second pressing roller 321. The purpose of providing the mesh plate 33 is to screen the copper powder crushed by the second crushing device and separate the metal powder with larger particles. The mesh plate 33 includes a first end and a second end which are relatively arranged and both are fixed on the inner wall of the shell 31, the position of the first end is higher than the position of the second end, a vibrator 34 is installed at the bottom of the first end of the mesh plate 33, and a discharge port 35 is opened at the second end of the shell 31, and the discharge port 35 is connected with an inclined discharge pipe 41. Under the vibration action of the vibrator 34, the coarser particles screened by the mesh plate 33 are discharged along the mesh plate 33 to the discharge port 35, and are discharged along the inclined discharge pipe 41, and the end of the discharge pipe 41 away from the discharge port 35 is connected with a non-porous cloth pipe 5 made of non-woven fabric, and the end of the cloth pipe 5 away from the discharge pipe 41 is fixedly connected with a screw feeder 42 and connected to the feed port of the screw feeder 42, and the discharge port of the screw feeder 42 is connected with a feeding pipe 43, and the end of the feeding pipe 43 away from the screw feeder 42 is connected with the internal space of the shell 31 and is located above the second pressure roller 321 and transports materials to the inside of the shell 31. The screw feeder conveys the collected copper powder particles with larger particle sizes to the feed pipe 43, and then conveys them to the inside of the shell 31 through the feed pipe 43, so that the second pressing roller 321 and the second crushing teeth 322 can further crush the copper powder particles with coarser particle sizes, supplementing the production process of copper powder to ensure that the obtained copper powder has uniform particle size and meets the requirements.

[0031] like Figure 1 As shown, a curved baffle 36 is fixedly installed on one side of the upper end of the shell 31 away from the conveyor belt 1, and the concave surface of the curved baffle 36 faces the first pressing roller 21. Vertical baffles 37 are fixedly arranged on both sides of the upper end of the shell 31 adjacent to the conveyor belt 1, and one end of the vertical baffle 37 away from the shell 31 is fixedly connected to the curved baffle 36. The curved baffle 36 and the vertical baffle 37 together form a containment structure to prevent the first pressing roller 21 from causing the crushed copper powder particles to splash around during the process of rotating and crushing the copper powder cake, causing material loss.

[0032] From the above, it can be seen that the specific implementation of the utility model is as follows:

[0033] After the reduced powder cake is conveyed to the continuous crushing mechanism through the conveyor belt 1, it passes through the first crushing device first, and the first pressing roller 21 on the first crushing device starts to rotate, driving the first crushing teeth 22 spirally distributed on the first pressing roller 21 to start rotating and contacting the copper powder cake. Under high-speed rotation, the copper powder cake in contact with the first crushing teeth 22 is crushed into particles, and the copper powder particles fall into the shell 31 along the conveyor belt 1. After the two second pressing rollers 321 and the second crushing teeth 322 contact each other, the copper powder particles are ground into copper powder, and the copper powder falls onto the mesh plate 33. The copper powder particles that have not been fully ground cannot pass through the sieve holes of the mesh plate 33, and slide along the mesh plate 33 into the discharge pipe 41 under the action of the vibrator 34, and are then transported to the inside of the shell 31 through the screw feeder, and continue to fall onto the second pressing roller 321 for secondary grinding.

[0034] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A continuous crushing mechanism for copper powder, comprising a conveyor belt, characterized in that: A first crushing device for crushing copper powder cakes into copper powder particles is installed above the conveying end of the conveyor belt, and the first crushing device includes a first pressing roller that can rotate with the axis as the reference axis, and a row of first crushing teeth are spirally distributed around the first pressing roller. A second crushing device for crushing copper powder particles into copper powder is installed below the conveying end of the conveyor belt.

2. A continuous crushing mechanism for copper powder according to claim 1, characterized in that: The distance between the first pressing roller and the conveyor belt is smaller than the thickness of the powder cake.

3. The continuous crushing mechanism for copper powder according to claim 1, characterized in that: The second crushing device includes a shell, and the inside of the shell includes two second pressure rollers whose axes are parallel to each other and can rotate with the axes as reference axes, and the two second pressure rollers rotate in opposite directions. A plurality of second crushing teeth are evenly distributed on the second pressure rollers, and the crushing teeth on the two second pressure rollers can mesh with each other when rotating.

4. A continuous crushing mechanism for copper powder according to claim 3, characterized in that: A mesh plate with a plurality of sieve holes is arranged inside the shell and below the second pressing roller.

5. A continuous crushing mechanism for copper powder according to claim 4, characterized in that: The mesh plate includes a first end and a second end which are relatively arranged and fixed on the inner wall of the shell. The position of the first end is higher than that of the second end. The shell is provided with a discharge port at the second end, and the discharge port is connected to a discharge pipe.

6. A continuous crushing mechanism for copper powder according to claim 5, characterized in that: A vibrator is installed at the bottom of the first end of the mesh plate.

7. A continuous crushing mechanism for copper powder according to claim 6, characterized in that: The end of the discharge pipe away from the discharge port is connected to a screw feeder, the outlet of the screw feeder is connected to a feeding pipe, the end of the feeding pipe away from the screw feeder is connected to the internal space of the shell and is located above the second pressure roller and transports materials to the inside of the shell.

8. A continuous crushing mechanism for copper powder according to claim 7, characterized in that: One end of the discharge pipe away from the discharge port is connected to a non-porous cloth pipe made of non-woven fabric, and one end of the cloth pipe away from the discharge pipe is fixedly connected to the feed port of the screw feeder.

9. A continuous crushing mechanism for copper powder according to claim 3, characterized in that: A curved baffle is fixedly installed on the side of the upper end of the shell away from the conveyor belt, and the concave surface of the curved baffle faces the first pressure roller. Vertical baffles are fixedly arranged on both sides of the upper end of the shell adjacent to the conveyor belt, and the end of the vertical baffle away from the shell is fixedly connected to the curved baffle.

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