A new type of ball mill improvement device

Abstract

This utility model discloses a novel improved ball mill device in the field of chemical equipment technology, comprising: multiple inner lining units, evenly spaced along the axial direction of the ball mill cylinder, each inner lining unit being formed by splicing multiple circumferentially distributed inner lining arc plates; multiple spring buffer assemblies, correspondingly disposed between the inner lining arc plates and the ball mill cylinder, for supporting the inner lining arc plates and providing elastic buffering to absorb the impact force of the grinding media and aluminum sheets on the inner lining arc plates; wherein, the spring buffer assembly includes multiple first spring columns, multiple second spring columns, and a switching mechanism, the first spring columns and second spring columns being staggered along the axial direction in the back support area of ​​the inner lining arc plates. This device adopts a dual-stiffness spring switching mechanism to achieve dynamic control of the support rigidity during grinding, balancing flattening efficiency and sheet shape protection, effectively reducing the breakage rate and edge curling of the aluminum sheets during the grinding process.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a novel improved ball mill device. Background Technology

[0002] The core component of aluminum silver paste is flake-shaped aluminum particles. Its basic raw material is aluminum powder (usually spherical or irregular fine powder). The grinding process involves high-speed collision, shearing, and extrusion of the aluminum powder with grinding media (such as steel balls or ceramic balls) within a ball mill, crushing the original aluminum powder into aluminum flakes with specific thickness, diameter, and smoothness. In the production of aluminum silver paste (especially for high-quality products used in coatings, inks, and electronic materials), the required aluminum flake shape is a key factor determining the final product's performance (such as metallic luster, hiding power, leveling properties, and conductivity). The ideal aluminum flake shape is typically a round, flat, thin sheet with a particle size usually between 3μm and 100μm, a thickness generally between 0.1-0.5μm, and intact edges that are not easily curled or broken.

[0003] Currently, the requirements for downstream products in the aluminum silver paste industry are increasing year by year. Traditional ball mills have a large cross-sectional diameter, and the aluminum sheets have a large space to move within them, making them susceptible to large impact forces. Due to the mechanical action of collisions and compression by the grinding media (such as steel balls) inside the ball mill, the aluminum sheets are prone to breakage or curling, affecting the gloss of the final product and its performance in applications, such as dispersion and reflectivity in coatings.

[0004] To address these issues, a novel ball mill improvement device is provided. Utility Model Content

[0005] The purpose of this invention is to provide a new type of ball mill improvement device, which solves the problem that aluminum sheets in existing ball mills are prone to breakage and edge curling under strong impact.

[0006] This utility model achieves the above objectives through the following technical solutions: A novel ball mill improvement device includes: Multiple inner lining units are arranged at equal intervals along the axial direction of the ball mill cylinder, and each inner lining unit is formed by splicing together multiple circumferentially distributed inner lining arc plates. Multiple spring buffer assemblies are arranged one-to-one between the inner lining arc plate and the ball mill cylinder to support the inner lining arc plate and provide elastic buffering to absorb the impact force of the grinding media and aluminum sheet on the inner lining arc plate.

[0007] The spring buffer assembly includes multiple first spring posts, multiple second spring posts, and a switching mechanism. The first and second spring posts are staggered along the axial direction in the back support area of ​​the inner lining arc plate, and the stiffness coefficient of the first spring post is greater than that of the second spring post. The switching mechanism is used to selectively drive the first spring post or the second spring post to abut against the inner lining arc plate, so as to realize the switchable adjustment of the back support stiffness of the inner lining arc plate at different grinding stages.

[0008] As a further optimization of this utility model, the switching mechanism includes a mounting seat fixedly disposed on the outer peripheral wall of the ball mill cylinder, a gear rotatably disposed on the mounting seat, and two first racks symmetrically disposed on both sides of the gear and meshing with it; the top of each of the two first racks is fixedly provided with a mounting bracket, and the two mounting brackets are respectively used to install the first spring column and the second spring column.

[0009] As a further optimization of this utility model, the first spring column includes a column body and a movable rod movably inserted into the column body. The top end of the movable rod is fixedly provided with a stop plate, and a spring is sleeved on the movable rod between the stop plate and the column body; the structure of the second spring column is the same as that of the first spring column.

[0010] As a further optimization of this utility model, it also includes an adjustment frame and an outer shell cylinder; the outer shell cylinder is fixedly sleeved on the outer periphery of the ball mill cylinder to accommodate and protect the spring buffer assembly; the adjustment frame is transversely mounted on the outer shell cylinder and is connected to each switching mechanism for synchronously driving the operation of each switching mechanism to achieve simultaneous switching of the first spring column and the second spring column in multiple inner lining units.

[0011] As a further optimization of this utility model, the adjusting frame has two parallel annular end plates and a plurality of connecting rods fixed between the two annular end plates; each connecting rod has a second rack meshing with the gear at the corresponding position; the outer side of the annular end plate has a push-pull member and the inner side has a locking block; the end face of the outer shell has a locking hole that cooperates with the locking block.

[0012] As a further optimization of this utility model, a wear-resistant layer is provided on the side surface of the inner lining arc plate facing the inner cavity of the ball mill cylinder, and an elastic expansion joint is provided at the splice of adjacent inner lining arc plates.

[0013] As a further optimization of this utility model, the inner lining arc plate is configured as an elastic plate, including an elastic body. The elastic body has an air cavity, which is connected to an external air pressure control system through an inflation pipe and an exhaust pipe that penetrate the wall of the elastic body. The air pressure of the air cavity is dynamically adjusted to achieve switchable adjustment of the self-supporting stiffness of the inner lining arc plate at different grinding stages.

[0014] The beneficial effects of this utility model are as follows: 1. This utility model adopts a dual-rigidity spring switching mechanism to achieve dynamic control of support rigidity during the grinding process, taking into account both flattening efficiency and sheet protection. The device provides high rigidity support in the initial grinding stage to quickly flatten aluminum powder, and switches to low rigidity flexible support in the fine grinding stage to protect the shape of aluminum sheets. This effectively reduces the breakage rate and edge curling of aluminum sheets during the grinding process, thereby significantly improving the metallic luster, sheet integrity rate and batch consistency of aluminum silver paste products.

[0015] 2. This utility model sets the inner lining arc plate as an elastic structure with a built-in air cavity. By adjusting the air cavity pressure, the stiffness of the inner lining arc plate itself can be adjusted, forming a dual stiffness control mechanism with the spring buffer assembly, which further improves the controllability of the grinding process and the stability of product quality. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the inner lining unit and the spring buffer assembly of this utility model; Figure 3 This is a schematic diagram of the spring buffer assembly structure of this utility model; Figure 4 This is a schematic diagram of the adjustment frame structure of this utility model; Figure 5 This is a schematic diagram of the inner arc plate structure of this utility model.

[0017] In the picture: 1. Inner lining arc plate; 101. Elastic main body; 102. Wear-resistant layer; 103. Elastic expansion joint; 104. Inflation pipe; 105. Exhaust pipe; 2. Grinding mill cylinder; 3. First spring column; 301. Column; 302. Movable rod; 303. Support plate; 304. Spring; 4. Second spring column; 5. Switching mechanism; 501. Mounting base; 502. Gear; 503. First rack; 504. Mounting bracket; 6. Adjusting bracket; 601. Annular end plate; 602. Connecting rod; 603. Second rack; 604. Push-pull component; 605. Locking block; 7. Outer shell cylinder. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example 1 To address the problems of existing ball mills, such as large cylinder diameter and short length leading to low grinding efficiency, small batch feed, and easy breakage and edge curling of aluminum sheets under strong impact, please refer to [the relevant documentation / reference]. Figures 1-3 This utility model provides a novel improved ball mill device, comprising: Multiple inner lining units are arranged at equal intervals along the axial direction of the ball mill cylinder 2. Each inner lining unit is formed by splicing multiple inner lining arc plates 1 evenly distributed in the circumference. Adjacent inner lining arc plates 1 abut against each other to form a continuous inner wall surface. The length of the ball mill cylinder 2 can be 4000mm and the diameter can be 600mm. By reducing the cross-sectional diameter and increasing the length, the direct impact force on the aluminum sheet is reduced. Multiple spring buffer components are arranged one-to-one between the inner lining arc plate 1 and the ball mill cylinder 2 to support the inner lining arc plate 1 and provide elastic buffer to absorb the impact force of the grinding media and aluminum sheet on the inner lining arc plate 1, thereby reducing the breakage rate and edge curling of the aluminum sheet during the grinding process.

[0020] The spring buffer assembly includes multiple first spring posts 3, multiple second spring posts 4, and a switching mechanism 5. The first spring posts 3 and second spring posts 4 are staggered along the axial direction in the back support area of ​​the inner lining arc plate 1, and the stiffness coefficient of the first spring post 3 is greater than that of the second spring post 4. For example, the stiffness of the first spring post 3 is 80-120 N / mm, and the stiffness of the second spring post 4 is 40-60 N / mm. The switching mechanism 5 is used to selectively drive the first spring post 3 or the second spring post 4 to abut against the inner lining arc plate 1, so as to realize the switchable adjustment of the back support stiffness of the inner lining arc plate 1 at different grinding stages.

[0021] The first spring column 3 includes a column body 301 and a movable rod 302 movably inserted into the column body 301. A stop plate 303 is fixedly provided at the top of the movable rod 302. A spring 304 is sleeved on the movable rod 302 between the stop plate 303 and the column body 301. The structure of the second spring column 4 is the same as that of the first spring column 3.

[0022] The switching mechanism 5 includes a mounting base 501 fixedly mounted on the outer peripheral wall of the ball mill cylinder 2, a gear 502 rotatably mounted on the mounting base 501, and two first racks 503 symmetrically arranged on both sides of the gear 502 and meshing with it. Mounting brackets 504 are fixedly mounted on the top of each of the two first racks 503, and the two mounting brackets 504 are respectively used to mount the first spring post 3 and the second spring post 4. By driving the gear 502 to rotate forward or backward, the two first racks 503 are driven to move linearly in opposite directions, thereby controlling the first spring post 3 and the second spring post 4 mounted on different mounting brackets 504 to selectively abut or disengage from the outer wall of the inner lining arc plate 1, thus achieving the switching of support stiffness.

[0023] When the switching mechanism 5 pushes the first spring column 3 or the second spring column 4 into the support position, the abutment plate 303 contacts the back of the inner lining arc plate 1. During the grinding process, the grinding medium impacts the inner lining arc plate 1, causing it to move towards the outside of the cylinder. The impact force is transmitted through the abutment plate 303 to the movable rod 302, compressing the spring 304. The column 301 is fixed on the mounting bracket 504. The spring 304 absorbs the impact energy and produces an elastic deformation of 0.5-1.2mm to buffer the impact. After the impact ends, the spring 304 rebounds, pushing the movable rod 302 to reset, causing the inner lining arc plate 1 to rebound slightly, forming a micro-disturbance effect, which helps the material to redistribute and prevents local accumulation.

[0024] To reduce operational complexity and improve switching efficiency, such as Figure 1 , Figure 4 As shown, it also includes an adjustment frame 6 and an outer shell cylinder 7; the outer shell cylinder 7 is fixedly sleeved on the outer periphery of the ball mill cylinder 2 and is used to accommodate and protect the spring buffer assembly; the adjustment frame 6 is straddling the outer shell cylinder 7 and is connected to each switching mechanism 5 for synchronously driving each switching mechanism 5 to achieve simultaneous switching of the first spring column 3 and the second spring column 4 in multiple inner liner units.

[0025] The adjusting frame 6 has two parallel annular end plates 601 and multiple connecting rods 602 fixed between the two annular end plates 601; each connecting rod 602 has a second rack 603 that meshes with the gear 502 at the corresponding position; the outer side of the annular end plate 601 has a push-pull member 604 and the inner side has a locking block 605; the end face of the outer shell cylinder 7 has a locking hole that cooperates with the locking block 605.

[0026] Initially, the adjusting frame 6 is located at one end of the axial direction, with its second rack 603 meshing with the gears 502 of each unit. All the first spring columns 3 are in a supported state, the second spring columns 4 are disengaged, and the locking block 605 is embedded in the locking hole on the end face of the outer shell cylinder 7 to achieve axial locking and prevent vibration and loosening. The control system starts the external drive device, such as a hydraulic cylinder, electric push rod, or manual, to act on the push-pull component 604. The push-pull component 604 drives the entire adjusting frame 6 to translate along the axial direction of the ball mill. The second rack 603 on the connecting rod 602 moves accordingly, driving the gears 502 of each unit to rotate synchronously. The gears 502 drive the first racks 503 on both sides to move in opposite directions, causing the first spring columns 3 to disengage from the supported position and the second spring columns 4 to enter the supported position. When the adjusting frame 6 moves to the predetermined position on the other end, the locking block 605 on the annular end plate 601 on the other side automatically engages in the corresponding locking hole.

[0027] like Figure 5As shown, the inner lining arc plate 1 has a wear-resistant layer 102 on the side surface facing the inner cavity of the ball mill cylinder 2. An elastic expansion joint 103 is provided at the splice of adjacent inner lining arc plates 1. The elastic expansion joint 103 is filled with an elastic sealing material such as silicone or polyurethane sealing strip to prevent material from seeping in but allow free expansion and contraction.

[0028] In the initial grinding stage, the switching mechanism 5 drives the first spring column 3 to abut against the inner lining arc plate 1 to provide high rigidity support, promoting the rapid extension of spherical aluminum powder into a sheet structure and achieving efficient flattening. When the grinding time reaches the preset value, the control system issues a switching command. In the fine grinding stage, the switching mechanism 5 drives the second spring column 4 to abut against the inner lining arc plate 1 to provide low rigidity support, which has a larger elastic deformation, reduces the breakage and curling of the aluminum sheet edges caused by repeated collisions, and the micro-disturbance generated by the rebound helps the material to be evenly distributed, improving the grinding uniformity.

[0029] Example 2 Based on Example 1, in order to further reduce impact strength and prevent the aluminum sheet edges from breaking, curling, or surface scratches, such as Figure 5 As shown, the inner lining arc plate 1 is set as an elastic plate, including an elastic body 101. An air cavity is provided in the elastic body 101. The air cavity is connected to an external air pressure control system through an air inlet pipe 104 and an exhaust pipe 105 that penetrate the wall of the elastic body 101. The air pressure of the air cavity is dynamically adjusted to realize the switchable adjustment of the self-supporting stiffness of the inner lining arc plate 1 at different grinding stages.

[0030] In the initial grinding stage, compressed air is injected into the air chamber through the air inlet pipe 104, raising the internal pressure to 0.3-0.5 MPa, limiting the deformation capacity of the elastic body 101 (deformation ≤ 0.4 mm). This, combined with the strong support provided by the first spring column 3, allows the grinding media to exert a strong shearing effect on the aluminum powder, promoting the rapid extension of spherical particles into a sheet-like structure, achieving efficient flattening. In the fine grinding stage, the control system opens the solenoid valve on the exhaust pipe 105 to release the gas in the air chamber, reducing the pressure to 0.05-0.1 MPa. This enhances the flexibility of the elastic body 101, allowing for greater elastic deformation (up to 0.8-1.2 mm). The inner lining arc plate 1 has good buffering capacity, absorbing the impact energy of the grinding balls and aluminum sheets, reducing edge collision damage and curling of the aluminum sheets, and improving the product's gloss and dispersion uniformity.

[0031] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A novel ball mill improvement device, characterized by, include: Multiple inner lining units are arranged at equal intervals along the axial direction of the ball mill cylinder (2), and each inner lining unit is formed by splicing together multiple circumferentially distributed inner lining arc plates (1); Multiple spring buffer components are arranged one-to-one between the inner lining arc plate (1) and the ball mill cylinder (2) to support the inner lining arc plate (1) and provide elastic buffer to absorb the impact force of the grinding media and aluminum sheet on the inner lining arc plate (1). The spring buffer assembly includes multiple first spring columns (3), multiple second spring columns (4), and a switching mechanism (5). The first spring columns (3) and the second spring columns (4) are staggered along the axial direction on the back support area of ​​the inner lining arc plate (1), and the stiffness coefficient of the first spring column (3) is greater than that of the second spring column (4). The switching mechanism (5) is used to selectively drive the first spring column (3) or the second spring column (4) to abut against the inner lining arc plate (1) so as to realize the switchable adjustment of the back support stiffness of the inner lining arc plate (1) at different grinding stages.

2. The novel ball mill improvement device according to claim 1, characterized in that, The switching mechanism (5) includes a mounting base (501) fixed on the outer peripheral wall of the ball mill cylinder (2), a gear (502) rotatably mounted on the mounting base (501), and two first racks (503) symmetrically arranged on both sides of the gear (502) and meshing with it. The top of each of the two first racks (503) is fixedly provided with a mounting bracket (504), and the two mounting brackets (504) are respectively used to install the first spring post (3) and the second spring post (4).

3. The novel ball mill improvement device according to claim 1, characterized in that, The first spring column (3) includes a column body (301) and a movable rod (302) movably inserted into the column body (301). The top end of the movable rod (302) is fixedly provided with a stop plate (303), and a spring (304) is sleeved on the movable rod (302) between the stop plate (303) and the column body (301). The structure of the second spring post (4) is the same as that of the first spring post (3).

4. A novel improved device for ball mill as claimed in claim 1 wherein, It also includes an adjustment frame (6) and an outer shell cylinder (7); The outer shell (7) is fixedly sleeved on the outer periphery of the ball mill cylinder (2) to accommodate and protect the spring buffer assembly; The adjustment frame (6) is mounted across the outer shell cylinder (7) and is connected to each switching mechanism (5) for synchronously driving each switching mechanism (5) to achieve simultaneous switching of the first spring column (3) and the second spring column (4) in multiple inner lining units.

5. The novel ball mill improvement device according to claim 4, characterized in that, The adjusting frame (6) has two parallel annular end plates (601) and a plurality of connecting rods (602) fixed between the two annular end plates (601). Each of the connecting rods (602) has a second rack (603) that meshes with the gear (502) at the position of the gear. The outer side of the annular end plate (601) is provided with a push-pull member (604) and the inner side is provided with a locking block (605). The end face of the outer shell cylinder (7) is provided with a locking hole that cooperates with the locking block (605).

6. The novel ball mill improvement device according to claim 1, characterized in that, The inner lining arc plate (1) has a wear-resistant layer (102) on the side facing the inner cavity of the ball mill cylinder (2), and an elastic expansion joint (103) is provided at the splice of adjacent inner lining arc plates (1).

7. The novel ball mill improvement device according to claim 6, characterized in that, The inner lining arc plate (1) is configured as an elastic plate, including an elastic body (101). The elastic body (101) is provided with an air cavity. The air cavity is connected to an external air pressure control system through an inflation pipe (104) and an exhaust pipe (105) that penetrate the wall of the elastic body (101). The air pressure of the air chamber is dynamically adjusted to achieve switchable adjustment of the self-supporting stiffness of the inner lining arc plate (1) at different grinding stages.

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