A calendering and pulverizing integrated device

Abstract

The application discloses a calendering and crushing integrated device, relates to the metal powder processing and manufacturing technical field, and aims to solve the technical problems of low production efficiency, large equipment space occupation and high energy consumption caused by the separation of the calendering and crushing processes in the prior art. The device comprises a first driving component, a box body, a calendering component and a material distributing component. The first driving component is used to drive the calendering component to calender and crush metal powder. The material distributing component is installed in the box body and is used to screen the metal powder after calendering and crushing. The application is mainly used for the continuous and integrated production of flaky copper powder. The calendering, crushing and screening functions are integrated in the same device, closed continuous operation from raw materials to finished products is realized, the production efficiency is effectively improved, and the impurity pollution risk in the equipment occupation and material transfer process is reduced.

Description

Technical Field

[0001] This invention belongs to the field of metal powder processing and manufacturing technology, and specifically relates to an integrated rolling and pulverizing device. Background Technology

[0002] Flake copper powder, as a key electronic functional material, has been widely used in various fields such as electronic information, new energy, electromagnetic shielding, and conductive pastes due to its excellent electrical and thermal conductivity and good processability. It is one of the core raw materials for preparing terminal electrodes of multilayer ceramic chip capacitors, flexible circuit boards, and electromagnetic shielding coatings, and plays an important supporting role in promoting the miniaturization, high precision, and high performance of electronic devices. Compared with traditional spherical copper powder, flake copper powder has a larger specific surface area, better planar contact characteristics, and a lower sintering temperature. When forming conductive paths, it can build a denser "multi-contact network," effectively reducing contact resistance. Its conductivity is significantly better than that of spherical copper powder, which can improve the reliability of electronic devices while reducing material usage. It has gradually replaced some silver powder in the preparation of conductive pastes, significantly reducing production costs while meeting performance requirements.

[0003] Currently, the mainstream method for preparing flake copper powder in industry is ball milling. This method is simple and low-cost, but it has many technical bottlenecks, making it difficult to meet the high-quality and high-efficiency production requirements of high-end electronics. The most prominent problem is that the rolling and crushing processes in the existing preparation process are separated and need to be completed step by step using multiple independent devices: first, the copper powder raw material is processed into flake intermediates through a dedicated rolling device, then the intermediates are transferred to crushing and refining equipment, and finally, additional separation equipment is required to classify and screen the crushed copper powder to remove impurities and unqualified particles. This step-by-step production mode not only leads to a lengthy production process, large equipment space occupation, and high energy consumption, but also seriously affects production efficiency. In addition, the copper powder needs to be transferred multiple times during the process transition, which not only increases the labor cost, but also makes it easier to introduce external impurities, making it difficult to achieve precise control of product purity. The dispersant remaining during ball milling and the metal impurities generated by equipment wear can further increase the volume resistivity of the product, affecting its conductivity. Meanwhile, since the calendering and pulverizing processes are independent of each other, it is impossible to achieve coordinated control of process parameters. The sheet-like intermediates produced during the calendering process have uneven thickness and irregular shape. After pulverization, they are prone to problems such as large fluctuations in particle size distribution, many burrs on the edge of the sheet, and poor uniformity of product morphology. This results in large differences in product performance between batches, making it difficult to meet the strict requirements of high-end electronic devices for the particle size and morphology of sheet copper powder. It may even affect the coating performance of subsequent conductive pastes and the stability of electronic devices.

[0004] In summary, addressing the technical pain points in existing flake copper powder preparation processes, such as separation of rolling and pulverizing steps, low production efficiency, uneven product morphology, difficulty in impurity control, and cumbersome processes, this paper proposes an integrated rolling and pulverizing device for flake copper powder. This device integrates rolling, pulverizing, and separation functions, enabling coordinated control of process parameters and closed-loop continuous production. This design has significant practical implications and industrial application value. Summary of the Invention

[0005] The present invention aims to provide an integrated calendering and crushing device, which is mainly used to solve the technical problems of low production efficiency, large equipment space occupation, high energy consumption, and inability to achieve continuous and high-precision production caused by the separation of calendering and crushing processes in the existing technology.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An integrated rolling and crushing device includes a first driving component, a housing, a rolling component, and a material distribution component. The first driving component is used to drive the rolling component to roll and crush metal powder, and the material distribution component is installed inside the housing to screen the rolled and crushed metal powder.

[0007] Preferably, the housing includes a base, a sealing plate, side plates, a top plate, an inspection door, a feed hopper, and support legs. The support legs are fixed to the four corners of the base. There are two side plates, which are installed opposite each other on both sides of the base. A fixing plate is fixedly installed at one end of the base. The inspection door is rotatably installed on the side plate. The top plate is fixed to the upper part of the side plate. The feed inlet is located on the top plate. The first driving component is installed on the outside of the side plate, and the material distribution component is installed on the inside of the side plate.

[0008] Preferably, the calendering component includes two opposing first crushing rollers and two opposing second crushing rollers, the first and second crushing rollers being rotatably mounted on the inner side of the side plate, the second crushing rollers being located directly below the first crushing rollers, and the feed hopper being located directly above the first crushing rollers; The first drive component includes an electrical control box, a first motor, a first pulley drive component, and a gear drive component. There are two sets of gear drive components, two in each set, which are meshed and correspondingly installed on the rotating shafts of the two first crushing rollers and the two second crushing rollers. The motor is installed on the outside of the side plate, and its drive shaft is fixedly connected to the rotating shaft of one of the second crushing rollers. The second pulley drive component is installed on the rotating shafts of the first crushing rollers and the second crushing rollers. The material distribution unit includes a sieve bucket, a screen, a third motor, a second pulley drive component, and a camshaft. There are two sieve buckets, which are movably mounted inside the side plate, located below the first and second crushing rollers, respectively. A screen is installed inside the sieve bucket to screen metal powder of the corresponding particle size. There are two camshafts, which are rotatably mounted inside the side plate and abut against the tails of the two sieve buckets. The third motor is mounted on the outside of the side plate, and its drive shaft is fixedly connected to the camshafts. The second pulley drive component is installed between the two camshafts. The screen is installed inside the sieve bucket, which has a gradually narrowing opening near the fixed plate. The sieve bucket is inclined towards the fixed plate. The third motor drives the camshaft, thereby driving the sieve bucket to reciprocate and screen the metal powder.

[0009] Preferably, it also includes a return material component, which includes a lifting trough, a first collecting hopper, a second motor, a conveying trough, and a spiral lifting rod. The first collecting hopper is fixed to the inside of the fixed plate and is located below the opening of the screen hopper below the first crushing roller. The lifting trough is vertically arranged above the first collecting hopper, and a conveying trough extends from the upper part of the lifting trough to the feeding hopper. The spiral lifting rod is rotatably installed in the lifting trough. The second motor is fixedly installed on the top of the lifting trough and is fixedly connected to the spiral lifting rod. The return material component is used to send the uncrushed metal powder back to the first crushing roller for secondary rolling and crushing.

[0010] Preferably, the screen bucket also includes a reset rod, a spring, and a fixing component. The fixing component is integrally formed at the four corners of the screen bucket. Two mounting plates are also provided in the side plate on one side. The fixing component and the mounting plate are provided with round holes. The reset rod is connected in series with the mounting plate and the fixing component. The two ends of the reset rod are fixed with nuts. The spring is sleeved on the reset rod and located between the mounting plate and the fixing component. When the camshaft drives the screen bucket to move, the spring will reset the screen bucket.

[0011] Preferably, the material distribution component also includes a second collecting hopper, which is funnel-shaped. Multiple mounting parts are provided on both sides of the second collecting hopper, and corresponding mounting grooves are provided on the side plates. The second collecting hopper is installed in the mounting grooves through the mounting parts. The second collecting hopper is located below the upper screen hopper, and the lower opening of the second collecting hopper is directly opposite the second crushing roller. The inner diameter of the second collecting hopper is larger than the outer diameter of the screen.

[0012] Preferably, the housing further includes a first collection box and a second collection box, which are slidably installed between the side plates. The first collection box is located below the opening of the lower screen hopper, and the second collection box is located below the screen inside the lower screen hopper.

[0013] Preferably, the mesh size of the screen located at the higher position is 25 μm, and the mesh size of the screen located at the lower position is 10 μm.

[0014] Preferably, the access door is equipped with a handle and a lock.

[0015] Preferably, the first and second collection bins are equipped with handles.

[0016] The beneficial effects of this invention are as follows: 1. This technical solution integrates rolling, crushing, and sieving functions into the same device. The enclosure provides a sealed working environment, and the first driving component drives the rolling component to complete the rolling and crushing of metal powder. The material distribution component directly performs sieving inside the enclosure. This effectively solves the problems of long production process, large equipment space occupation, and high energy consumption caused by the separation of rolling and crushing processes in the prior art. It realizes continuous and integrated production of metal powder from raw materials to finished products, and significantly improves production efficiency.

[0017] 2. The base, side plates, top plate, and fixed plate together form a relatively enclosed working space, effectively preventing the leakage of metal powder during processing and avoiding the intrusion of external impurities, which is conducive to the precise control of product purity. At the same time, the installation of the maintenance door provides convenience for the daily maintenance, cleaning, and adjustment of the equipment, the support legs ensure the stability of the equipment operation, and the setting of the feed hopper facilitates the input of raw materials. The entire box structure is compact, the layout is reasonable, and the manufacturing cost is low.

[0018] 3. By setting up two-stage crushing rollers (first crushing roller and second crushing roller), gradient rolling and pulverization of metal powder is achieved, significantly improving the thickness uniformity and morphological regularity of the flake intermediate. By setting up a return material component, larger particles that fail to pass through the screen after the first stage of crushing are automatically collected and transported back to the feed hopper. After being mixed with fresh raw materials, they re-enter the first crushing roller for secondary rolling and crushing, forming an internal circulation loop. This effectively solves the problem of continuous production caused by process separation in the existing technology, greatly improves the utilization rate of raw materials, avoids material waste, and ensures the particle size uniformity of the final product, thereby improving the overall production efficiency and powder output.

[0019] 4. The combination of a reset rod, spring, and fixing components provides a stable and reliable reset mechanism for the screen bucket. When the camshaft pushes the screen bucket, the spring is compressed and stores energy; after the cam rotates past its highest point, the spring releases its elastic force, causing the screen bucket to automatically and smoothly return to its original position. This ensures that the screen bucket can perform regular reciprocating motion, avoiding problems such as jamming or excessive impact, thereby guaranteeing the continuity and stability of the screening process, improving screening efficiency, and extending the service life of the equipment.

[0020] 5. By setting a funnel-shaped second collecting hopper between the upper screen hopper and the second crushing roller, the fine particles after the first-stage screening are accurately collected and directionally conveyed, ensuring that all the material passing through the upper screen can fall into the gap of the second crushing roller, avoiding material scattering or splashing; at the same time, the second collecting hopper can be detachably connected by mounting parts and mounting grooves, which is convenient for replacement or cleaning according to process requirements.

[0021] 6. By setting up a sliding and pull-out first collection box and a second collection box, the large-particle-size recycled materials and fine finished products after final screening are collected separately, realizing automatic product classification and convenient unloading.

[0022] 7. A stepped screening system was constructed by setting the upper screen aperture to 25μm and the lower screen aperture to 10μm. The preliminary screening effectively removed coarse particles and reduced the burden on the second crushing roller, while the final screening ensured precise control of the output particle size, enabling the stable production of fine, flaky copper powder with small particle size that meets the requirements of high-end electronics. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention patent; Figure 2 This is a partial cross-sectional view of the present invention patent; Figure 3 In this invention patent Figure 3 Side view; Figure 4 This is a cross-sectional view of the box structure of this invention patent; The reference numerals in the accompanying drawings include: 1. First drive component; 101. Electrical control box; 102. First motor; 103. First pulley drive component; 104. Gear drive component; 2. Box body; 201. Side panel; 202. Top panel; 203. Feed hopper; 204. Inspection door; 205. Mounting plate; 206. Mounting slot; 207. Support leg; 208. First collection box; 209. Second collection box; 210. Fixing plate; 3. Return material component; 301. Lifting chute; 302. First collecting hopper; 303. Second motor; 304. Conveying chute; 305. Screw lifting rod; 4. Calendering component; 401. First crushing roll; 402. Second crushing roll; 5. Material distribution component; 501. Second pulley drive component; 502. Third motor; 503. Screen hopper; 504. Reset rod; 505. Camshaft; 506. Baffle plate; 507. Spring; 508. Fixing component; 509. Screen; 510. Second collection hopper; 511. Mounting component. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "top surface," "bottom surface," "inner," "outer," "inner side," and "outer side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0029] Example 1: This invention provides an integrated calendering and crushing device, such as... Figures 1-4 As shown, the integrated calendering and crushing device includes a housing 2, which forms the external outline and internal installation space of the entire device. The housing 2 includes a base, which is a rectangular flat plate structure used to support the weight of the entire device. Four support legs 207 are fixedly connected to the four corners of the base, providing stable support for the entire device on the ground or work platform. The housing 2 also includes two side plates 201, which are identical in shape and parallel to each other. They are installed opposite each other on both sides of the base, i.e., the left and right sides, with the side plates 201 extending upwards perpendicular to the plane of the base. At one end of the base, that is, along the length of one side plate 201, a fixing plate 210 is fixedly installed. The fixing plate 210 is perpendicular to the base and the two side plates 201, used to close that end face of the housing 2. A top plate 202 is fixedly installed on the top of the housing 2. The top plate 202 is fixedly connected to the upper edge of the side plate 201 and the fixed plate 210, thus forming a relatively enclosed internal working space together with the base, side plate 201, and fixed plate 210. A feed inlet is provided on the top plate 202 for feeding the metal powder raw material to be processed into the housing 2. Above the feed inlet, a feed hopper 203 is fixedly installed. The feed hopper 203 is funnel-shaped, wider at the top and narrower at the bottom. Its lower outlet is directly opposite to and connected to the feed inlet on the top plate 202, guiding the raw material smoothly into the housing 2. On the two side plates 201, maintenance doors 204 are rotatably installed. The maintenance doors 204 can be opened outwards to facilitate maintenance, cleaning, and adjustment of the internal components of the housing 2 by the operator. The maintenance door 204 can be equipped with a handle and a lock. The handle facilitates opening and closing, while the lock is used to lock the maintenance door 204 during normal operation to prevent dust leakage and ensure safety.

[0030] Inside the housing 2, a rolling mill component 4 is installed. This component is used to extrude, roll, and initially crush the metal powder. The rolling mill component 4 includes two opposing first crushing rollers 401. The axes of these two first crushing rollers 401 are parallel to each other, and a predetermined small gap is maintained between their cylindrical surfaces. The two ends of the two first crushing rollers 401 are rotatably mounted on the inner sides of two side plates 201 via bearings, allowing them to rotate freely between the side plates 201. The first crushing rollers 401 are located directly below the feed hopper 203, allowing the metal powder falling from the feed hopper 203 to fall directly into the gap between the two first crushing rollers 401. The rolling mill component 4 also includes two opposing second crushing rollers 402. The structure of the second crushing rollers 402 is similar to that of the first crushing rollers 401; they are also two cylindrical rollers with parallel axes and a gap between their surfaces. The second crushing rollers 402 are also rotatably mounted on the inner sides of the two side plates 201 via bearings, and are located directly below the first crushing rollers 401. In this way, the material that has been initially rolled and crushed by the first crushing roller 401 will naturally fall to the gap of the second crushing roller 402 under the action of gravity, and receive further rolling and refining in the second stage.

[0031] To drive the first crushing roller 401 and the second crushing roller 402 to rotate, the device is provided with a first driving component 1. The first driving component 1 includes a first motor 102, which is fixedly mounted on the outer side of one of the side plates 201. The output shaft of the first motor 102 is fixedly connected to the rotating shaft of one of the second crushing rollers 402 via a coupling or directly, thereby inputting power to the second crushing roller 402. To achieve relative rotation between the two second crushing rollers 402, a gear transmission component 104 is installed on the rotating shaft of each of the two second crushing rollers 402, and the two gears mesh with each other. When the first motor 102 drives one of the second crushing rollers 402 to rotate, the other second crushing roller 402 is driven to rotate synchronously in the opposite direction through the meshing gears, thereby achieving the squeezing and crushing of the material falling into the gap. The first driving component 1 also includes a first pulley transmission component 103, which is connected between the rotating shaft of the first crushing roller 401 and the rotating shaft of the second crushing roller 402. Specifically, the first pulley drive component 103 may include a driving pulley mounted on the shaft of the second crushing roller 402, a driven pulley mounted on the shaft of the first crushing roller 401, and a drive belt sleeved between them. When the second crushing roller 402 rotates, power is transmitted to the first crushing roller 401 through the first pulley drive component 103, causing the first crushing roller 401 to also begin to rotate. Similarly, a set of meshing gear drive components 104 are also installed on the shafts of the two first crushing rollers 401, thereby ensuring that the two first crushing rollers 401 can rotate synchronously in opposite directions. Through this transmission method, the first motor 102 can simultaneously drive the first crushing roller 401 and the second crushing roller 402 to perform calendering operations. The first drive component 1 may also include an electrical control box 101, which contains control circuits and switching elements for controlling the start, stop, and speed adjustment of the first motor 102.

[0032] Inside the housing 2, below the rolling mill component 4, is a material distribution component 5. The material distribution component 5 is used to screen the metal powder after rolling and crushing to separate qualified products that meet the particle size requirements. The material distribution component 5 includes two sieve hoppers 503, both of which are movably connected and installed inside two side plates 201. One sieve hopper 503 is located directly below the first crushing roller 401, used to receive material after the first stage of crushing; the other sieve hopper 503 is located directly below the second crushing roller 402, used to receive material after the second stage of crushing. Each sieve hopper 503 is a box-shaped structure with an open top, and a screen 509 is installed at its bottom. Specifically, the sieve 509 in the higher sieve hopper 503 has a mesh size of 25 micrometers, used for initial screening of fine particles smaller than 25 micrometers; the sieve 509 in the lower sieve hopper 503 has a mesh size of 10 micrometers, used for further screening of fine flaky copper powder smaller than 10 micrometers. Each sieve hopper 503 has a gradually narrowing opening on the side facing the fixed plate 210, which is used to discharge large-diameter particles that fail to pass through the sieve 509. The entire sieve hopper 503 is inclined towards the fixed plate 210, that is, the end of the sieve hopper 503 closest to the fixed plate 210 is lower than the other end, which facilitates the flow of material towards the opening during the screening process.

[0033] To achieve the reciprocating motion of the sieve bucket 503 for screening, the material distribution component 5 also includes two camshafts 505 and a third motor 502. The two camshafts 505 are rotatably mounted on the inner sides of the two side plates 201, and the position of each camshaft 505 corresponds to the tail of one sieve bucket 503, that is, to the end of the sieve bucket 503 furthest from the fixed plate 210. Cams are mounted on the camshafts 505, and the cams abut against the outer wall of the tail of the sieve bucket 503. The third motor 502 is fixedly mounted on the outer surface of the side plate 201, and its drive shaft is fixedly connected to one end of one of the camshafts 505, providing rotational power to the camshaft 505. A second pulley drive component 501 is also installed between the two camshafts 505. This second pulley drive component 501 includes pulleys mounted on the ends of the two camshafts 505 and a belt sleeved between the pulleys. When the third motor 502 drives the camshaft 505 directly connected to it to rotate, the other camshaft 505 also rotates synchronously through the second pulley transmission component 501. During the rotation, the cams on the two camshafts 505 periodically push the tail of the screen bucket 503, causing the screen bucket 503 to move forward (i.e., towards the fixed plate 210). To cooperate with the cam's pushing and enable the screen bucket 503 to automatically return to its original position, each screen bucket 503 is also equipped with a reset rod 504, a spring 507, and a fixing member 508. Specifically, a fixing member 508 is integrally formed at each of the four corners of each screen bucket 503, and the fixing member 508 has a round hole. On the inner side of each side plate 201, corresponding to the installation position of each screen bucket 503, two mounting plates 205 are fixedly installed, and the mounting plates 205 also have round holes. The reset rod 504 passes sequentially through the round holes on the mounting plate 205 and the fixing member 508, connecting the screen bucket 503 between the mounting plate 205. Both ends of the reset rod 504 are locked with nuts. A spring 507 is sleeved on the reset rod 504 and located between the mounting plate 205 and the fixing member 508. When the cam pushes the screen bucket 503 to move, the spring 507 is compressed; when the cam passes its highest point, the elastic force of the spring 507 pushes the fixing member 508, causing the screen bucket 503 to move in the opposite direction, thus achieving reset. In this way, driven by the third motor 502, the camshaft 505 rotates continuously, and the screen bucket 503, under the pushing action of the cam and the reset action of the spring 507, performs continuous reciprocating motion, thereby causing the metal powder on the screen 509 to continuously tumble and shake, achieving rapid and efficient screening of the material.

[0034] To recycle larger particles that fail to pass through screen 509 after the first-stage crushing back to the first crushing roller 401 for further calendering, the device also includes a return material component 3. The return material component 3 includes a first collecting hopper 302, which is fixedly installed inside the fixing plate 210, and its opening is located directly below the opening of the higher screen hopper 503 (i.e., the screen hopper 503 located below the first crushing roller 401). During the reciprocating motion of the screen hopper 503, larger particles that fail to pass through screen 509 are discharged from the opening of the screen hopper 503 and fall into the first collecting hopper 302. The return material component 3 also includes a vertically arranged lifting chute 301, the lower end of which communicates with the bottom of the first collecting hopper 302 and is fixed above the first collecting hopper 302. Inside the lifting trough 301, a spiral lifting rod 305 is rotatably mounted, the length of which is approximately the same as the height of the lifting trough 301. At the top of the lifting trough 301, a second motor 303 is fixedly mounted, its output shaft fixedly connected to the upper end of the spiral lifting rod 305, for driving the spiral lifting rod 305 to rotate. Near the top of the lifting trough 301, a conveying trough 304 extends out, in an inclined or curved pipe shape, its end extending above or directly connecting to the feed hopper 203. When the second motor 303 starts, the spiral lifting rod 305 rotates, conveying the large particles of material falling into the first collecting hopper 302 upward along the lifting trough 301. When the material is lifted to the conveying trough 304, it can slide down along the conveying trough 304 under the action of gravity and finally enter the feeding hopper 203. After mixing with the new raw materials, it falls back into the space between the first crushing rollers 401 for secondary calendering and crushing, thereby realizing the recycling of materials and improving the overall powder output rate and product uniformity.

[0035] In the material distribution component 5, a second collecting hopper 510 is also provided below the upper screen hopper 503 (i.e., the screen hopper 503 below the first crushing roller 401). The second collecting hopper 510 is generally funnel-shaped, wider at the top and narrower at the bottom, and is used to collect fine particles that fall through the screen 509 of the screen hopper 503 and guide them to the second crushing roller 402 for further processing. Multiple mounting parts 511, such as hooks, clips, or bolt holes, are provided on both sides of the second collecting hopper 510. Mounting grooves 206 are provided on the side plates 201 on both sides corresponding to the positions of the mounting parts 511. The second collecting hopper 510 is detachably installed inside the housing 2 by engaging its mounting parts 511 with the mounting grooves 206 on the side plates 201, and is located directly below the upper screen hopper 503. The lower opening of the second collecting hopper 510 faces directly above the gap between the second crushing rollers 402, allowing the collected material to fall accurately between the second crushing rollers 402. In order to ensure that all the material that falls through the screen 509 can be collected and not scattered, the inner diameter of the upper opening of the second collecting hopper 510 is larger than the outer diameter of the screen 509, that is, the inlet of the second collecting hopper 510 can completely cover the projected area of ​​the screen 509.

[0036] At the bottom of the housing 2, a first collection bin 208 and a second collection bin 209 are also provided for collecting the final main product and secondary product. Both the first collection bin 208 and the second collection bin 209 are drawer-type structures, slidably installed between two side plates 201. For example, by providing slide rails on the inside of the side plates 201, the collection bins are placed on the slide rails, allowing them to be pulled out and pushed in like drawers. The first collection bin 208 is located below the opening of the lower sieve hopper 503 (i.e., the sieve hopper 503 below the second crushing roller 402), and is used to collect particles larger than 10 micrometers discharged from the opening of the sieve hopper 503. The second collection bin 209 is located below the screen 509 inside the lower sieve hopper 503, that is, directly below the sieve hopper 503, and is used to collect fine flaky copper powder with a particle size smaller than 10 micrometers that leaks through the 10-micrometer screen 509; this part is the final main product. To prevent the main product from falling into the first collection bin 208 due to shaking, a baffle plate 506 is also provided on the lower side of the screen hopper 503. For ease of operation, handles can also be provided on the outer panels of the first collection bin 208 and the second collection bin 209 for easy pushing and pulling. In addition, sealing plates can be installed on the inner side of the side plate 201, in the gaps between the two screen hoppers 503 and between the screen hoppers 503 and the wall of the box 2. These sealing plates are used to prevent powder from scattering inside the box 2, ensuring that the material flows strictly along the set path, and also helping to maintain a clean working environment.

[0037] Through the coordinated operation of the aforementioned components, the metal powder, after being fed into the feed hopper 203, sequentially undergoes initial rolling by the first crushing roller 401, initial screening by the first screen hopper 503, collection and guidance by the second collection hopper 510, further rolling by the second crushing roller 402, and fine screening by the second screen hopper 503, ultimately yielding fine, flaky copper powder with uniform particle size and good flaky morphology in the second collection box 209. Large particles that fail the initial screening are automatically recycled back to the first crushing roller 401 via the return material component 3, achieving continuous, closed, and automated production throughout the entire process. The entire device has a compact structure, clear connections between components, and coordinated actions, enabling it to efficiently and stably complete all processing steps from raw materials to finished products.

[0038] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the invention and are protected by patent law.

Claims

1. An integrated calendering and crushing device, characterized in that, It includes a first driving component (1), a housing (2), a rolling component (4), and a material distribution component (5). The first driving component (1) is used to drive the rolling component (4) to roll and crush the metal powder. The material distribution component (5) is installed inside the housing (2) to screen the metal powder that has been rolled and crushed.

2. The integrated calendering and crushing device according to claim 1, characterized in that, The housing (2) includes a base, a fixing plate (210), a side plate (201), a top plate (202), an inspection door (204), a feed hopper (203), and support legs (207). The support legs (207) are fixed to the four corners of the base. There are two side plates (201) installed opposite each other on both sides of the base. The fixing plate (210) is fixedly installed at one end of the base. The inspection door (204) is rotatably installed on the side plate (201). The top plate (202) is fixed to the upper part of the side plate (201). The feed hopper (203) is set on the top plate (202). The first driving component (1) is installed on the outside of the side plate (201). The material distribution component (5) is installed on the inside of the side plate (201).

3. The integrated calendering and crushing device according to claim 2, characterized in that, The calendering component (4) includes two opposing first crushing rollers (401) and two opposing second crushing rollers (402). The first crushing rollers (401) and the second crushing rollers (402) are rotatably mounted on the inner side of the side plate (201). The second crushing rollers (402) are located directly below the first crushing rollers (401), and the feed hopper (203) is located directly above the first crushing rollers (401). The first drive component (1) includes an electrical control box (101), a first motor (102), a first pulley drive component (103), and a gear drive component (104). The gear drive component (104) has two sets, two in each set, which are meshed and correspondingly installed on the rotating shafts of the two first crushing rollers (401) and the two second crushing rollers (402). The first motor (102) is installed on the outside of the side plate (201), and its drive shaft is fixedly connected to the rotating shaft of one of the second crushing rollers (402). The first pulley drive component (103) is installed on the rotating shafts of the first crushing roller (401) and the second crushing roller (402). The material distribution component (5) includes a sieve bucket (503), a screen (509), a third motor (502), a second pulley transmission component (501), and a camshaft (505). There are two sieve buckets (503), which are movably installed inside the side plate (201) and located below the first crushing roller (401) and the second crushing roller (402), respectively. A screen (509) is provided inside the sieve bucket (503) to screen metal powder of the corresponding particle size. There are two camshafts (505), which are rotatably installed inside the side plate (201) and connected to the tail of the two sieve buckets (503). The third motor (502) is mounted on the outside of the side plate (201), and its drive shaft is fixedly connected to the camshaft (505). The second pulley transmission component (501) is installed between the two camshafts (505). The screen (509) is installed inside the screen bucket (503). The screen bucket (503) is provided with a gradually narrowing opening, which is close to the side of the fixed plate (210). The screen bucket (503) is inclined towards the fixed plate (210). The third motor (502) drives the camshaft (505), thereby driving the screen bucket (503) to reciprocate and thus screen the metal powder.

4. The integrated calendering and crushing device according to claim 3, characterized in that, It also includes a return material component (3), which includes a lifting trough (301), a first collecting hopper (302), a second motor (303), a conveying trough (304), and a spiral lifting rod (305). The first collecting hopper (302) is fixed to the inside of the fixed plate (210). The first collecting hopper (302) is located below the opening of the screen hopper (503) below the first crushing roller (401). The lifting trough (301) is vertically arranged above the first collecting hopper (302). The conveying trough (304) extends from the upper part of the lifting trough (301) and extends to the feeding hopper (203). The spiral lifting rod (305) is rotatably installed in the lifting trough (301). The second motor (303) is fixedly installed on the top of the lifting trough (301) and fixedly connected to the spiral lifting rod (305). The return material component (3) is used to send the uncrushed metal powder back to the first crushing roller (401) for secondary rolling crushing.

5. The integrated calendering and crushing device according to claim 3, characterized in that, The sieve bucket (503) also includes a reset rod (504), a spring (507), and a fixing member (508). The fixing member (508) is integrally formed at the four corners of the sieve bucket (503). Two mounting plates (205) are also provided in the side plate (201) on one side. The fixing member (508) and the mounting plate (205) are provided with round holes. The reset rod (504) is connected in series with the mounting plate (205) and the fixing member (508). The two ends of the reset rod (504) are fixed with nuts. The spring (507) is sleeved on the reset rod (504) and located between the mounting plate (205) and the fixing member (508). When the camshaft (505) drives the sieve bucket (503) to move, the spring (507) will reset the sieve bucket (503).

6. The integrated calendering and crushing device according to claim 3, characterized in that, The material distribution component (5) also includes a second collection hopper (510), which is funnel-shaped. Multiple mounting parts (511) are provided on both sides of the second collection hopper (510). A corresponding mounting groove (206) is provided on the side plate (201). The second collection hopper (510) is installed in the mounting groove (206) through the mounting parts (511). The second collection hopper (510) is located below the upper screen hopper (503). The lower opening of the second collection hopper (510) is directly opposite the second crushing roller (402). The inner diameter of the second collection hopper (510) is larger than the outer diameter of the screen (509).

7. The integrated calendering and crushing device according to claim 3, characterized in that, The box body (2) also includes a first collection box (208) and a second collection box (209). The first collection box (208) and the second collection box (209) are slidably installed between the side plates (201). The first collection box (208) is located below the opening of the lower screen hopper (503), and the second collection box (209) is located below the screen (509) inside the lower screen hopper (503).

8. The integrated calendering and crushing device according to claim 3, characterized in that, The sieve (509) located at the higher position has an aperture of 25 μm, and the sieve (509) located at the lower position has an aperture of 10 μm.

9. The integrated calendering and crushing device according to claim 2, characterized in that, The inspection door (204) is equipped with a handle and a lock.

10. The integrated calendering and crushing device according to claim 7, characterized in that, The first collection box (208) and the second collection box (209) are provided with handles.

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