Ball-milling mixing device based on NTC (Negative Temperature Coefficient) thermistor slurry

Abstract

The utility model relates to the technical field of ball-milling mixing devices, in particular to a ball-milling mixing device based on NTC (Negative Temperature Coefficient) thermistor slurry, which comprises a martensitic stainless steel ball body and a discharging cylinder assembly, a driving magnetic attraction assembly is arranged on the outer side of the discharging cylinder assembly, and the discharging cylinder assembly comprises a martensitic stainless steel rotating cylinder; a first vertical plate and a second vertical plate are fixedly connected to the outer side of the martensitic stainless steel rotating cylinder, the driving magnetic attraction assembly comprises a servo motor, a double-threaded rod is fixedly connected to the tail end of a main shaft of the servo motor, an inner screw hole plate is spirally connected to the outer side of the double-threaded rod, a lantern ring is fixedly connected to one side of the inner screw hole plate, and a rail plate is fixedly connected to the bottom end of the lantern ring; according to the NTC thermistor slurry grinding device, impurity powder generated in the grinding process can be effectively removed, the purity of NTC thermistor slurry and the performance of later-stage finished products are improved, and the quality and reliability of the products are ensured.

Description

Technical Field

[0001] This utility model relates to the field of ball milling mixing device technology, specifically to a ball milling mixing device based on NTC thermistor slurry. Background Technology

[0002] NTC thermistor paste is a special material used to manufacture NTC thermistors. It is mainly composed of metal oxides and organic carriers. This paste is printed onto a ceramic substrate using a thick-film process and then sintered to form a thermistor film with a negative temperature coefficient. Its characteristic is that the resistance value decreases as the temperature increases. It has good resistance stability, process adaptability, and temperature response characteristics. It can be used in temperature compensation, sensing, and high-precision temperature measurement. NTC thermistor paste needs to be ground during reprocessing. The ball mill mixing device for NTC thermistor paste is a device used to mix various raw material powders with organic carriers evenly. It achieves full mixing and refinement of raw materials under the collision and friction of the grinding media through ball milling.

[0003] In existing NTC thermistor slurry grinding technology, steel balls are typically used for grinding. However, this grinding method has certain drawbacks. During the grinding process, friction between the steel balls and between the steel balls and the grinding jar causes wear, resulting in the shedding of metal powder from the surface of the steel balls. This shed metal powder mixes into the NTC thermistor slurry, becoming impurities. Since the performance of NTC thermistor slurry requires high purity, the presence of these impurities may negatively affect the purity of the slurry, thereby interfering with its performance to some extent. Therefore, to address the above problems, a ball milling and mixing device based on NTC thermistor slurry is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a ball milling mixing device based on NTC thermistor slurry to solve the problem that friction between steel balls and between steel balls and grinding jar causes wear, resulting in the shedding of metal powder from the surface of the steel balls. This shed metal powder mixes into the NTC thermistor slurry, affecting the purity of the slurry.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A ball milling mixing device based on NTC thermistor slurry includes a martensitic stainless steel ball and a discharge cylinder assembly. A drive magnetic suction assembly is installed on the outside of the discharge cylinder assembly. The discharge cylinder assembly includes a martensitic stainless steel rotating drum. A first vertical plate and a second vertical plate are fixedly connected to the outside of the martensitic stainless steel rotating drum. The drive magnetic suction assembly includes a servo motor. A double-threaded rod is fixedly connected to the end of the servo motor spindle. An internal threaded plate is helically connected to the outside of the double-threaded rod. A collar is fixedly connected to one side of the internal threaded plate. A rail plate is fixedly connected to the bottom of the collar. A guide post is slidably connected to the inner side of the rail plate. An electromagnet plate is fixedly connected to the rear end of the collar. The housing of the servo motor is fixedly connected to the front end of the first vertical plate. The guide post is fixedly connected to the inner side of the second vertical plate.

[0007] As a further optimization of this utility model, the inner wall of the martensitic stainless steel rotating cylinder is coated with polyurethane or zirconium oxide. An extension cylinder is fixedly connected to the front end of the martensitic stainless steel rotating cylinder. The inner side of the extension cylinder is hollow and fits against the outer side of the plunger. The inner side of the martensitic stainless steel rotating cylinder is hollow and communicates with the inner side of the extension cylinder. The martensitic stainless steel spheres are located inside the martensitic stainless steel rotating cylinder, and there are multiple martensitic stainless steel spheres.

[0008] As a further optimization of this utility model, the front and rear ends of the martensitic stainless steel rotating cylinder are both fixedly connected to fixed shafts, and bearings are fixedly connected to the outside of the fixed shafts. The fixed shafts are rotatably connected to the inner side of the shaft hole of the bracket through the bearings, and the number of brackets is the same as the number of fixed shafts.

[0009] As a further optimization of this utility model, the front end of the bracket is fixedly connected to the housing of the stepper motor, and the end of the main shaft of the stepper motor is fixedly connected to the inner side of the fixed shaft.

[0010] As a further optimization of this utility model, the following features are provided: a rotating hole is provided on the inner side of the first vertical plate; the first vertical plate is rotatably connected to the double threaded rod via a bearing; and the first and second vertical plates are distributed at the front and rear ends of the martensitic stainless steel rotating cylinder.

[0011] As a further optimization of this utility model, the inner side of the collar is fitted with the outer side of the martensitic stainless steel rotating cylinder, one side of the electromagnet plate is fitted with the outer side of the martensitic stainless steel rotating cylinder, the inner side of the internal thread plate is provided with a threaded hole, and the inner side of the rail plate is provided with a straight hole.

[0012] As a further optimization of this utility model, the number of electromagnet plates is two sets, and there is a gap between each set of electromagnet plates, with the gaps between the two sets of electromagnet plates being staggered.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, the device utilizes a martensitic stainless steel sphere, a discharge cylinder assembly, and a driving magnetic attraction assembly. During the grinding process, the device employs the martensitic stainless steel sphere, which is a ferromagnetic grinding medium. After grinding, a magnetic electromagnet plate is used to magnetically attract the NTC thermistor slurry, effectively removing impurities and powder generated during the grinding process. This magnetic attraction method not only reduces impurities within the slurry but also improves the purity of the NTC thermistor slurry and the performance of the final product. Furthermore, the inner wall of the martensitic stainless steel drum is coated with a polyurethane or zirconium oxide coating, which effectively prevents the wear of the drum during use, thus preventing the formation of impurities such as steel, extending its service life, and further ensuring the purity of the NTC thermistor slurry. This significantly improves the quality and reliability of the product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the drive magnetic suction component structure of this utility model;

[0018] Figure 4 This is an exploded structural diagram of the driving magnetic attraction component of this utility model;

[0019] Figure 5 This is a schematic diagram of the electromagnet plate structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the discharge cylinder assembly of this utility model.

[0021] In the diagram: 1. Martensitic stainless steel sphere;

[0022] 2. Discharge cylinder assembly; 21. Support; 22. Stepper motor; 23. Fixed shaft; 24. Extension cylinder; 25. Martensitic stainless steel rotary cylinder; 26. Plunger; 27. First vertical plate; 28. Second vertical plate;

[0023] 3. Drive magnetic suction assembly; 31. Servo motor; 32. Double threaded rod; 33. Collar; 34. Internal threaded plate; 35. Rail plate; 36. Guide post; 37. Electromagnet plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Please see Figure 1-6 This utility model provides a technical solution:

[0027] The ball milling mixing device based on NTC thermistor slurry includes a martensitic stainless steel ball 1 and a discharge cylinder assembly 2. A drive magnetic suction assembly 3 is installed on the outside of the discharge cylinder assembly 2. The discharge cylinder assembly 2 includes a martensitic stainless steel rotating drum 25. A first vertical plate 27 and a second vertical plate 28 are fixedly connected to the outside of the martensitic stainless steel rotating drum 25. The drive magnetic suction assembly 3 includes a servo motor 31. A double threaded rod 32 is fixedly connected to the end of the main shaft of the servo motor 31. An internal threaded plate 34 is spirally connected to the outside of the double threaded rod 32. A collar 33 is fixedly connected to one side of the internal threaded plate 34. A rail plate 35 is fixedly connected to the bottom of the collar 33. A guide post 36 is slidably connected to the inside of the rail plate 35. An electromagnet plate 37 is fixedly connected to the rear end of the collar 33. The housing of the servo motor 31 is fixedly connected to the front end of the first vertical plate 27. The guide post 36 is fixedly connected to the inside of the second vertical plate 28.

[0028] As a further implementation of this solution, the inner wall of the martensitic stainless steel rotating cylinder 25 is coated with a polyurethane coating or a zirconium oxide coating. These coatings are existing technologies and can be applied to the inner wall of the martensitic stainless steel rotating cylinder 25 during processing. This effectively prevents the wear and tear of the rotating cylinder during use, thus preventing the formation of impurities such as steel, improving its service life, and further ensuring the purity of the NTC thermistor slurry. An extension cylinder 24 is fixedly connected to the front end of the martensitic stainless steel rotating cylinder 25. The inner side of the extension cylinder 24 is hollow and fits against the outer side of the plunger 26. The inner side of the martensitic stainless steel rotating cylinder 25 is also hollow. The inner side of the extension cylinder 24 is connected to the inner side of the martensitic stainless steel rotating cylinder 25. The martensitic stainless steel ball 1 is located inside the martensitic stainless steel rotating cylinder 25. There are multiple martensitic stainless steel balls 1. Through the above settings, the hollow structure design of the extension cylinder 24 and the martensitic stainless steel rotating cylinder 25, as well as the fit between the extension cylinder 24 and the plunger 26, ensure that the NTC thermistor slurry can smoothly enter the grinding chamber. The presence of multiple martensitic stainless steel balls 1 as grinding media increases the grinding contact points and improves the grinding efficiency and slurry uniformity.

[0029] As a further implementation of this solution, the front and rear ends of the martensitic stainless steel rotating drum 25 are fixedly connected to fixed shafts 23. Bearings are fixedly connected to the outside of the fixed shafts 23. The fixed shafts 23 are rotatably connected to the inner side of the shaft hole of the bracket 21 through the bearings. The number of brackets 21 is the same as the number of fixed shafts 23. Through the above arrangement, the fixed shafts 23 are connected to the brackets 21 through the bearings, which reduces the friction during rotation and improves the operating efficiency and stability of the device. This design ensures that the martensitic stainless steel rotating drum 25 can rotate smoothly, thereby driving the martensitic stainless steel ball 1 to effectively grind the slurry.

[0030] As a further implementation of this solution, the front end of the bracket 21 is fixedly connected to the housing of the stepper motor 22, and the end of the main shaft of the stepper motor 22 is fixedly connected to the inner side of the fixed shaft 23. Through the above settings, the fixed connection between the bracket 21 and the stepper motor 22, as well as the connection between the main shaft of the stepper motor 22 and the fixed shaft 23, ensures the stable transmission of power. This structural design enables the martensitic stainless steel drum 25 to obtain stable power input, ensuring the continuity and uniformity of the grinding process.

[0031] As a further implementation of this solution, a rotating hole is provided on the inner side of the first vertical plate 27. The first vertical plate 27 is rotatably connected to the double threaded rod 32 through a bearing. The first vertical plate 27 and the second vertical plate 28 are both distributed at the front and rear ends of the martensitic stainless steel rotating cylinder 25. Through the above arrangement, the first vertical plate 27 is rotatably connected to the double threaded rod 32 through a bearing, which reduces the friction between rotating parts and improves the operating efficiency of the device. The first vertical plate 27 and the second vertical plate 28 are distributed at the front and rear ends of the martensitic stainless steel rotating cylinder 25, which ensures the structural balance and stability of the device.

[0032] As a further implementation of this solution, the inner side of the collar 33 is fitted with the outer side of the martensitic stainless steel rotating cylinder 25, and one side of the electromagnet plate 37 is fitted with the outer side of the martensitic stainless steel rotating cylinder 25. The inner side of the internal threaded plate 34 is provided with a threaded hole, and the inner side of the rail plate 35 is provided with a straight hole. Through the above settings, the fitting design of the collar 33 and the martensitic stainless steel rotating cylinder 25, as well as the fitting design of the electromagnet plate 37 and the martensitic stainless steel rotating cylinder 25, ensures that the magnet electromagnet plate 37 can closely contact the martensitic stainless steel rotating cylinder 25, thereby effectively magnetically attracting the martensitic stainless steel sphere 1. The threaded hole design of the internal threaded plate 34 and the straight hole design of the rail plate 35 can drive the collar 33 and the electromagnet plate 37 to move through the double threaded rod 32 and the internal threaded plate 34.

[0033] As a further implementation of this solution, there are two sets of electromagnet plates 37, with a spacing between each set of electromagnet plates 37. The spacing between the two sets of electromagnet plates 37 is staggered. Through the above arrangement, the staggered spacing between the two sets of electromagnet plates 37 makes the magnetic attraction force distribution more uniform, which can more effectively remove impurity powder generated during the grinding process. This design not only improves the purity of the slurry, but also reduces the interference of impurities on the performance of the slurry, significantly improving the quality of the NTC thermistor slurry and the performance of the final product.

[0034] Workflow: When grinding NTC thermistor slurry, the NTC thermistor slurry is placed into the martensitic stainless steel rotating drum 25 through the extension tube 24. The plunger 26 then seals the extension tube 24. The stepper motor 22 is started to drive the fixed shaft 23 to rotate. The fixed shaft 23 rotates inside the support 21. The bearing arrangement reduces the friction during the rotation of the fixed shaft 23. The support 21 supports the martensitic stainless steel rotating drum 25. The fixed shaft 23 drives the martensitic stainless steel rotating drum 25 to rotate. The rotation of the martensitic stainless steel rotating drum 25 causes the martensitic stainless steel balls 1 to roll. The friction between the martensitic stainless steel balls 1 and the NTC thermistor slurry achieves the grinding effect. To improve the efficiency of grinding the NTC thermistor slurry, the electromagnet plates 37 are activated in stages. Both sets of electromagnet plates 37 are energized simultaneously. After being energized, the electromagnet plates 37 generate magnetic force, which passes through... The martensitic stainless steel rotating drum 25 magnetically attracts the martensitic stainless steel sphere 1, thereby controlling the position of the martensitic stainless steel sphere 1 under the magnetic attraction of the electromagnet plate 37. Since the intervals between the two sets of electromagnet plates 37 are staggered, the positions of the martensitic stainless steel sphere 1 are also staggered. When the servo motor 31 is started, it drives the double threaded rod 32 to rotate. The double threaded rod 32 drives the two inner threaded hole plates 34 connected by the outer spiral to move closer or further away from each other at the same time. The inner threaded hole plates 34 drive the collar 33 and the rail plate 35 to move simultaneously. The rail plate 35 limits the movement of the collar 33. When the two electromagnet plates 37 move closer to each other, the two sets of martensitic stainless steel sphere 1 also move closer to each other. At this time, friction is generated between the two sets of martensitic stainless steel sphere 1. Through the friction of the martensitic stainless steel sphere 1, the NTC thermistor paste is further ground. This grinding method can significantly improve the grinding efficiency of the NTC thermistor paste.

[0035] During grinding with the martensitic stainless steel spheres 1, some of their own powder will fall off due to friction. This powder will mix into the interior of the NTC thermistor paste. The martensitic stainless steel spheres 1 are ferromagnetic and can be attracted by a magnet. The NTC thermistor paste itself is generally not magnetic and therefore will not be attracted. Following the same principle, the electromagnet plates 37 are activated, causing the two sets of electromagnet plates 37 to move away from each other until the electromagnet plates 37 cover the surface of the martensitic stainless steel rotating drum 25. Then, the stepper motor 22 drives the martensitic stainless steel rotating drum 25 to rotate, thereby causing the ground NTC thermistor paste to... The rotating mechanism allows the electromagnet plate 37 to evenly magnetically attract the powder of the martensitic stainless steel spheres 1 inside the NTC thermistor paste, while also limiting the position of the martensitic stainless steel spheres 1. This magnetic attraction method greatly reduces impurities mixed inside the NTC thermistor paste after it is taken out through the extension cylinder 24. Moreover, the inner wall of the martensitic stainless steel rotating cylinder 25 is coated with polyurethane or zirconium oxide, which can effectively prevent the appearance of impurities such as steel due to wear during use, improve service life, and further ensure the purity of the NTC thermistor paste, thus guaranteeing the performance of the final NTC thermistor product.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ball milling mixing device based on NTC thermistor paste comprising martensitic stainless steel balls (1) and a discharge cartridge assembly (2), characterized in that: The drive magnetic attraction assembly (3) is installed outside the discharge cylinder assembly (2); The discharge cylinder assembly (2) comprises a martensitic stainless steel rotating cylinder (25), and the outer side of the martensitic stainless steel rotating cylinder (25) is fixedly connected with a first vertical plate (27) and a second vertical plate (28); The drive magnetic attraction assembly (3) comprises a servo motor (31), the main shaft end of the servo motor (31) is fixedly connected with a double-thread rod (32), the outer side of the double-thread rod (32) is spirally connected with an internal screw hole plate (34), one side of the internal screw hole plate (34) is fixedly connected with a sleeve ring (33), the bottom end of the sleeve ring (33) is fixedly connected with a rail plate (35), the inner side of the rail plate (35) is slidably connected with a guide column (36), and the rear end of the sleeve ring (33) is fixedly connected with an electromagnet plate (37). The shell of the servo motor (31) is fixedly connected with the front end of the first vertical plate (27), and the guide column (36) is fixedly connected to the inner side of the second vertical plate (28).

2. The ball-milling mixing device based on NTC thermistor paste according to claim 1, characterized in that: The inner wall of the martensitic stainless steel rotating cylinder (25) is provided with a polyurethane coating or a zirconium oxide coating, the front end of the martensitic stainless steel rotating cylinder (25) is fixedly connected with an extension cylinder (24), the inner side of the extension cylinder (24) is a hollow structure, the inner side of the extension cylinder (24) is attached to the outer side of the plunger (26), the inner side of the martensitic stainless steel rotating cylinder (25) is a hollow structure, the inner side of the extension cylinder (24) is in communication with the inner side of the martensitic stainless steel rotating cylinder (25), the martensitic stainless steel ball body (1) is located in the interior of the martensitic stainless steel rotating cylinder (25), and the number of the martensitic stainless steel ball body (1) is multiple.

3. The ball-milling mixing device based on NTC thermistor paste according to claim 1, characterized in that: The front end and the rear end of the martensitic stainless steel rotating cylinder (25) are fixedly connected with fixed shaft rods (23), the outer side of the fixed shaft rod (23) is fixedly connected with a bearing, and the fixed shaft rod (23) is rotatably connected to the inner side of the shaft hole of the support (21) through the bearing.

4. The ball-milling mixing device based on NTC thermistor paste according to claim 3, characterized in that: The front end of the support (21) is fixedly connected with the shell of the stepping motor (22), and the main shaft end of the stepping motor (22) is fixedly connected with the inner side of the fixed shaft rod (23).

5. The ball-milling mixing device based on NTC thermistor paste according to claim 1, characterized in that: The inner side of the first vertical plate (27) is provided with a rotating hole, the first vertical plate (27) is rotatably connected with the double-thread rod (32) through a bearing, and the first vertical plate (27) and the second vertical plate (28) are arranged at the front end and the rear end of the martensitic stainless steel rotating cylinder (25).

6. The ball-milling mixing device based on NTC thermistor paste according to claim 1, characterized in that: The inner side of the sleeve ring (33) is attached to the outer side of the martensitic stainless steel rotating cylinder (25), one side of the electromagnet plate (37) is attached to the outer side of the martensitic stainless steel rotating cylinder (25), the inner side of the internal screw hole plate (34) is provided with a threaded hole, and the inner side of the rail plate (35) is provided with a straight hole.

7. The ball-milling mixing device based on NTC thermistor paste according to claim 1, characterized in that: The number of the electromagnet plates (37) is two groups, a spacing is arranged between the electromagnet plates (37) in each group, and the spacings between the two groups of electromagnet plates (37) are staggered.

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