High conductivity and thermal conductivity aluminum foil tape, preparation method and preparation system

Abstract

This invention relates to the field of tape manufacturing technology and discloses an aluminum foil tape with high electrical and thermal conductivity, comprising: a protective layer: the outermost layer of the tape to protect the aluminum foil from damage or oxidation; a conductive adhesive layer: located above the aluminum foil layer, composed of an adhesive with conductive particles added to further improve the conductivity of the tape; an aluminum foil layer: located below the aluminum foil layer, made of high-purity aluminum material, serving as the main conductive and thermally conductive layer of the tape; a thermal interface material layer: closely attached to the bottom of the aluminum foil layer; made of a filler with high thermal conductivity and added to the thermally conductive adhesive, primarily responsible for the thermal conductivity of the tape; and a pressure-sensitive adhesive layer: located at the bottom of the tape, in contact with the application surface, providing adhesion. This aluminum foil tape has high electrical and thermal conductivity and can be widely used in many fields such as electronics, electrical engineering, aerospace, automotive, and solar energy.

Description

Technical Field

[0001] This invention relates to the field of tape preparation technology, specifically to aluminum foil tape with high electrical conductivity and thermal conductivity, its preparation method, and preparation system. Background Technology

[0002] Aluminum foil tape has a wide range of applications, especially in situations requiring electrical conductivity. With technological advancements and increasing application scenarios, the performance requirements for aluminum foil tape are becoming increasingly stringent. Firstly, traditional aluminum foil tape is easily damaged or oxidized during use, which not only affects its conductivity but may also shorten its lifespan. Secondly, although aluminum foil itself has a certain degree of conductivity, these properties are limited by variations in material purity and processing techniques; general aluminum foil tape may lack sufficient conductivity, which may not meet the requirements of some demanding applications. Simply adding conductive materials to the tape may affect other properties, such as flexibility and adhesion. Another key issue is thermal conductivity. With the miniaturization and integration of electronic products and other devices, the requirements for heat dissipation are becoming more stringent. Traditional aluminum foil tape may be insufficient in terms of thermal conductivity, which may lead to overheating of devices, thus affecting performance and lifespan; existing aluminum foil tapes are already insufficient in some areas, where aluminum foil tapes with enhanced electrical and thermal conductivity are needed; for example:

[0003] Electromagnetic interference (EMI) shielding: Electromagnetic interference is a critical issue in modern electronic equipment. Aluminum foil tape can be used as a shielding material to prevent external electromagnetic interference from affecting the equipment, while also preventing interference generated by the equipment itself from being transmitted.

[0004] Thermal solutions: As electronic devices become smaller, their heat dissipation needs increase. Aluminum foil tape has excellent thermal conductivity and can help dissipate heat generated by integrated circuits or other electronic components.

[0005] Solid-state lighting (such as LEDs): The heat generated by LEDs needs to be effectively dissipated, otherwise it will affect their performance and lifespan. Aluminum foil tape can provide a thermal path between LED modules, helping heat to be conducted away quickly.

[0006] Solar panels: In solar cells, efficient heat dissipation and good electrical conductivity are required. Aluminum foil tape can meet both of these requirements.

[0007] Battery management and heat dissipation: High-performance batteries, especially lithium batteries, generate a significant amount of heat during charging and discharging. Aluminum foil tape helps dissipate this heat, ensuring the battery operates safely and optimally.

[0008] Automotive electronics: Many sensors and electronic control units in modern cars require materials that are both conductive and thermally conductive to ensure their proper functioning.

[0009] Aerospace: In the aerospace field, equipment frequently faces extreme temperature variations. This tape ensures that electronic and electrical systems function properly under these harsh conditions.

[0010] Microelectronic Packaging and Connection: In the packaging and connection process of microelectronic devices, tapes with high conductivity and thermal conductivity are required to ensure performance and reliability. Summary of the Invention

[0011] The purpose of this invention is to provide an aluminum foil tape with high electrical and thermal conductivity, a preparation method and a preparation system. This aluminum foil tape has high electrical and thermal conductivity and can be widely used in many fields such as electronics, electrical engineering, aviation, automobiles, and solar energy.

[0012] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0013] High electrical and thermal conductivity aluminum foil tapes, including:

[0014] Protective layer: This is the outermost layer of the tape, designed to protect the aluminum foil from damage or oxidation;

[0015] Conductive adhesive layer: Located above the aluminum foil layer, it consists of adhesive with conductive particles added to further improve the conductivity of the tape;

[0016] Aluminum foil layer: Located below the conductive adhesive layer, it is made of high-purity aluminum and serves as the main conductive and thermal conductive layer of the tape;

[0017] Thermal interface material layer: It is attached directly below the aluminum foil layer; it is made of a filler with high thermal conductivity and added to the thermally conductive adhesive, and is mainly responsible for the thermal conductivity of the tape.

[0018] Pressure-sensitive adhesive layer: Located at the bottom of the tape, it contacts the surface of the application and provides adhesion.

[0019] The protective layer is made of polyester, polyethylene, polypropylene, polyvinyl chloride, polytetrafluoroethylene, fluoroplastic film, nylon, or silicone rubber; the conductive particles in the conductive adhesive layer are silver particles; and the filler in the thermal interface material layer is alumina, boron oxide, or carbon nanotubes.

[0020] A method for preparing aluminum foil tape with high electrical and thermal conductivity includes the following steps:

[0021] ①Preparatory work:

[0022] Prepare raw materials, including high-purity aluminum foil, thermally conductive adhesive, conductive adhesive, conductive particles, and pressure-sensitive adhesive; ensure all equipment and work surfaces are clean to prevent impurities from entering;

[0023] ② Preparation of aluminum foil layer:

[0024] High-purity aluminum material is selected to prepare aluminum foil; aluminum blocks are rolled into aluminum foil of the required thickness through cold rolling process; the aluminum foil is annealed to improve its flexibility;

[0025] ③ Preparation of thermal interface material layer:

[0026] Select a filler with high thermal conductivity, and mix the thermally conductive adhesive and the filler in a mixer in a certain proportion until a uniform paste is obtained. Use a coating device to evenly coat the mixed paste onto one side of the aluminum foil layer, and then dry or cure it.

[0027] ④ Preparation of conductive adhesive layer:

[0028] In the mixer, conductive adhesive and conductive particles are mixed in proportion until a uniform conductive adhesive is obtained; the mixed conductive adhesive is evenly applied to the other side of the aluminum foil layer that has been coated with thermal interface material using a coating device; then drying or curing is performed.

[0029] ⑤ Preparation of pressure-sensitive adhesive layer:

[0030] Using an adhesive applicator, the pressure-sensitive adhesive is evenly applied to the thermal interface material layer; the pressure-sensitive adhesive is then cured by drying or UV curing.

[0031] ⑥ Add a protective layer:

[0032] The protective laminate is applied to the top of the conductive adhesive layer using lamination technology.

[0033] ⑦ Cutting and Packaging:

[0034] Use a cutter to cut the prepared tape to the required width and length; finally, wind the tape onto the paper core and then package it.

[0035] In step ④, the conductive particles are pre-treated using a raw material grinding mill. The raw material grinding mill includes a grinding cylinder, characterized in that: a lower grinding disc is provided at the upper end of the inner cavity of the grinding cylinder, and a grinding mechanism is provided above the lower grinding disc; a vibrating screen is provided below the grinding mechanism; a second discharge hole is provided on the outer side of the vibrating screen; a vibrating motor is provided on the lower surface of the vibrating screen; a collection box is connected to the lower outer end of the grinding cylinder, and the collection box is connected to the vibrating screen through the second discharge hole; a lifting channel is connected to the upper surface of the collection box, and a discharge pipe is connected to the upper end of one side of the lifting channel; and a circulation mechanism is provided in the inner cavity of the lifting channel.

[0036] The circulation mechanism includes a second motor fixedly connected to the lower surface of the collection box, and the output shaft of the second motor is driven to a second rotating shaft. The upper end of the second rotating shaft passes through the collection box and is driven to a lifting auger. The upper end of the lifting auger is rotatably connected to the top of the inner cavity of the lifting channel.

[0037] The grinding cylinder has a positioning plate in the middle of its inner cavity, and the upper surface of the positioning plate has multiple sets of material discharge holes. The lower end of the lower grinding disc has a first material discharge hole.

[0038] The grinding mechanism includes a first motor fixedly connected to the middle of the lower surface of the positioning disk. The output shaft of the first motor is drivenly connected to a first rotating shaft, and a sealing cone plate is fixedly connected to the upper end of the first rotating shaft.

[0039] The grinding mechanism includes an upper grinding disc and multiple sets of connecting screws. The sealing cone plate is positioned directly above the upper grinding disc and is fixedly connected to the upper grinding disc by multiple sets of connecting screws. The lower end of the upper grinding disc has a limiting hole for the first rotating shaft to pass through.

[0040] Two sets of limiting blocks are symmetrically welded to the outer side of the first rotating shaft, and both sets of limiting blocks fit into the limiting holes. The outer diameter of the upper grinding disc is smaller than the inner diameter of the lower grinding disc.

[0041] The lower end of the grinding cylinder is connected to a conical discharge cylinder, and multiple sets of support legs are welded to the upper end of the outer side of the conical discharge cylinder.

[0042] The lower surface of the vibrating screen plate intersects with the horizontal plane, and multiple sets of screen holes are opened at the bottom of the inner cavity of the vibrating screen plate.

[0043] The present invention has the following beneficial effects:

[0044] 1. The advantages of the aluminum foil tape with high electrical and thermal conductivity and its preparation method of the present invention include:

[0045] The issue of protecting aluminum foil: By adding a protective layer as the outermost layer of the tape, the aluminum foil can be effectively protected from physical damage or oxidation. This increases the tape's lifespan and durability, ensuring it maintains good electrical and thermal conductivity over extended periods.

[0046] Enhanced conductivity: Traditional aluminum foil tapes may lack sufficient conductivity. In this invention, by adding a conductive adhesive layer composed of conductive particles and a binder above the aluminum foil layer, the conductivity of the tape is further improved. This makes the tape more advantageous in applications requiring high conductivity.

[0047] The use of high-purity aluminum: The aluminum foil layer is made of high-purity aluminum, which ensures that the tape has more stable and superior electrical and thermal conductivity.

[0048] Optimized thermal conductivity: By introducing a thermal interface material layer made of highly thermally conductive filler and incorporated into the thermally conductive adhesive, the tape's thermal conductivity is further enhanced. This means the tape can work more effectively in applications requiring rapid heat dissipation.

[0049] Enhanced Adhesion: The pressure-sensitive adhesive layer is located at the bottom of the tape, in contact with the application surface, providing strong adhesion. This ensures the tape adheres firmly in various environments and conditions, reducing the risk of detachment due to vibration or temperature changes.

[0050] Wide range of applications: Due to its comprehensive performance, this aluminum foil tape can be widely used in many fields such as electronics, electrical, aviation, automobile, and solar energy.

[0051] 2. The advantages of the raw material grinding mill of the present invention include:

[0052] Grinding System: The raw material grinder includes a built-in lower grinding disc, a matching upper grinding disc, and a grinding mechanism, providing powerful grinding capabilities and enabling efficient grinding of raw materials.

[0053] Grading and screening: The vibrating screen design, combined with the vibrating motor to provide screening power, helps to separate finely ground powder from large particles in a timely manner, improving processing efficiency and grinding effect.

[0054] Recycling: Through the design of the material lifting channel and circulation mechanism, large particles that are not fully ground can be sent back into the grinding system for further grinding, which greatly improves the utilization rate of raw materials.

[0055] Positioning and material distribution: The positioning disc design and the first feeding hole inside the grinding cylinder help to evenly guide the raw materials into the grinding area and ensure that the ground products can pass through smoothly.

[0056] Precise power transmission: The design of the first and second motors provides power for grinding and material lifting, ensuring smooth operation of the entire machine.

[0057] Sealing and stability: The connection structure between the upper grinding disc and the sealing cone plate ensures the sealing of the grinding area and prevents dust from spilling out. At the same time, the design of the limiting block and limiting hole ensures the stability of the mechanical operation.

[0058] Material discharge design: The conical discharge cylinder design makes it easier for the ground raw materials to fall, while multiple support legs ensure the stability of the machine.

[0059] Screen hole configuration: Multiple sets of screen holes at the bottom of the vibrating screen can classify and screen the ground raw materials to ensure product quality.

[0060] The above characteristics can bring about:

[0061] High-efficiency grinding: Through the coordinated work of the upper and lower grinding discs, grinding efficiency has been greatly improved.

[0062] Resource saving: The design of the recycling mechanism allows large particles of raw materials to be re-ground, which greatly saves resources.

[0063] Easy to operate: The reasonable structural design makes the operation of the whole machine very simple and intuitive.

[0064] Increased stability: Through multiple positioning and support designs, the overall stability of the machine has been enhanced, reducing the failure rate.

[0065] Improved product quality: The design of the vibrating screen and screen holes ensures that the ground products have good uniformity and quality.

[0066] In summary, this raw material grinding mill is reasonably designed and fully functional, and can meet various grinding needs, which can greatly promote the improvement of production efficiency and product quality.

[0067] 3. The advantages of the glue application mechanism are:

[0068] Highly efficient electromagnetic drive: By switching the direction of the magnetic poles using a side electromagnet, the ferromagnetic deflector block can move repeatedly laterally. This electromagnetic drive method saves energy and ensures fast and stable movement, greatly improving the efficiency of adhesive application.

[0069] Precise adhesive control: Combining the movement of a ferromagnetic deflector and the design of a highly elastic tubing, the adhesive supply can be precisely controlled. When application is needed, the adhesive is accurately and quickly extruded, while when not needed, the adhesive flow is promptly and effectively cut off, preventing waste and unnecessary dripping.

[0070] Uniform application: The design of the adhesive layer and the distribution block ensures that the adhesive is evenly distributed on the tape base, whether in one place or multiple places, a uniform and continuous application can be obtained.

[0071] Stable operation: The chute design provides stable guidance between the ferromagnetic deflector and the non-magnetic fixed block, avoiding uneven adhesive application caused by unstable drive. Meanwhile, the upper electromagnet provides additional stability to the entire system, ensuring smooth operation even at high speeds.

[0072] Energy saving and noise reduction: The entire system adopts an electromagnetic drive method, which not only allows for flexible, convenient and precise parameter adjustment, but is also more energy-efficient and quieter than traditional drive methods.

[0073] Highly expandable and adaptable: Multiple glue-applying mechanisms are set along the transmission direction of the adhesive tape base, which makes the system very flexible and can be adjusted and configured according to different glue-applying needs.

[0074] Easy maintenance: The structure between each component is clear, and the highly elastic hose can be easily replaced by a detachable pressure plate, making maintenance and replacement simple and quick, thereby reducing equipment maintenance and enabling rapid switching between different adhesive formulations, thus expanding the production range of the production line.

[0075] Safe and reliable: During the movement of the ferromagnetic deflector block, multiple mechanisms ensure that the adhesive does not leak. For example, the combined design of the lower moving block and the side fixing block can seal the adhesive at the right time. Moreover, the process is automatic and does not rely on electronic detection equipment. It is extremely stable in operation and not prone to failure.

[0076] In summary, this adhesive application mechanism not only improves the efficiency and quality of adhesive application, but also takes into account stability, energy saving, and ease of maintenance in its design, making it highly practical and with broad application prospects. Attached Figure Description

[0077] 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. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0078] Figure 1 This is a schematic diagram of the aluminum foil tape of the present invention;

[0079] Figure 2 This is a schematic diagram of the overall front view of the raw material grinding mill of the present invention;

[0080] Figure 3 This is a schematic diagram of the cross-sectional structure of the grinding cylinder of the raw material grinding mill of the present invention;

[0081] Figure 4 This is a schematic diagram of the grinding mechanism of the raw material grinding machine of the present invention;

[0082] Figure 5 This is a cross-sectional structural diagram of the adhesive application mechanism of the present invention during the sealing and injection stage;

[0083] Figure 6 yes Figure 5 Enlarged view of circle A in the middle;

[0084] Figure 7 yes Figure 5 Enlarged view of circle B in the middle;

[0085] Figure 8 This is a cross-sectional view of the glue application mechanism of the present invention when the upper glue outlet is just opened.

[0086] Figure 9 yes Figure 8 Enlarged view of point C in the middle circle;

[0087] Figure 10 This is a cross-sectional structural schematic diagram of the adhesive coating mechanism of the present invention during the adhesive dispensing stage;

[0088] Figure 11 yes Figure 10 Enlarged view of point D in the middle circle;

[0089] Figure 12 This is a schematic diagram of multiple glue-applying mechanisms connected in series to apply glue together.

[0090] The attached diagram lists the components represented by each number as follows:

[0091] In the diagram: 1. Adhesive tape base; 21. Non-magnetic material fixing block; 210. Upper adhesive channel; 211. Upper adhesive inlet; 212. Upper adhesive outlet; 213. Upper adhesive cavity; 214. Highly elastic adhesive tube; 215. Upper fixing block; 216. Lower moving block; 217. Side fixing block; 218. Removable pressure plate; 22. Ferromagnetic deflection block; 220. Lower adhesive channel; 221. Lower adhesive inlet; 222. Lower adhesive outlet; 223. Branch channel; 224. Diverting block; 23. Upper electromagnet; 24. Side electromagnet; 25. Adhesive layer; 26. Non-magnetic sleeve; 27. Pressure dispensing tube; 28. Smooth support plane; 31. Grinding cylinder; 32. Conical discharge cylinder; 33. Grinding mechanism; 331. First motor; 332. First rotating shaft; 333. Limiting block; 334. Sealing cone plate; 335. Connecting screw; 336. Upper grinding disc; 337. Limiting hole; 34. Lower grinding disc; 341. First discharge hole; 35. Lifting channel; 36. Collection box; 37. Circulation mechanism; 371. Second motor; 372. Second rotating shaft; 373. Lifting auger; 38. Positioning disc; 39. Discharge hole; 310. Vibrating screen disc; 311. Second discharge hole; 311. Vibrating motor; 312. Discharge pipe; 4. Conductive adhesive layer; 5. Aluminum foil layer; 6. Thermal interface material layer; 7. Pressure-sensitive adhesive layer; 8. Protective layer. Detailed Implementation

[0092] 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.

[0093] Example 1

[0094] See Figure 1 High electrical and thermal conductivity aluminum foil tapes, including:

[0095] Protective layer 8: This is the outermost layer of the tape, designed to protect the aluminum foil from damage or oxidation.

[0096] Conductive adhesive layer 4: Located above the aluminum foil layer, it consists of adhesive with conductive particles added to further improve the conductivity of the tape;

[0097] Aluminum foil layer 5: Located below conductive adhesive layer 4, it is made of high-purity aluminum material and serves as the main conductive and thermal conductive layer of the tape;

[0098] Thermal interface material layer 6: It is closely attached to the aluminum foil layer 5; it is made of a filler with high thermal conductivity and added to the thermally conductive adhesive, and is mainly responsible for the thermal conductivity of the tape.

[0099] Pressure-sensitive adhesive layer 7: Located at the bottom of the tape, it contacts the surface of the application and provides adhesion.

[0100] Furthermore, the protective layer is made of polyester, polyethylene, polypropylene, polyvinyl chloride, polytetrafluoroethylene, fluoroplastic film, nylon, or silicone rubber; the conductive particles in the conductive adhesive layer are silver particles; and the filler in the thermal interface material layer is alumina, boron oxide, or carbon nanotubes.

[0101] A method for preparing aluminum foil tape with high electrical and thermal conductivity includes the following steps:

[0102] ①Preparatory work:

[0103] Prepare raw materials, including high-purity aluminum foil, thermally conductive adhesive, conductive adhesive, conductive particles, and pressure-sensitive adhesive; ensure all equipment and work surfaces are clean to prevent impurities from entering;

[0104] ② Preparation of aluminum foil layer 5:

[0105] High-purity aluminum material is selected to prepare aluminum foil; aluminum blocks are rolled into aluminum foil of the required thickness through cold rolling process; the aluminum foil is annealed to improve its flexibility;

[0106] ③ Preparation of thermal interface material layer 6:

[0107] Select a filler with high thermal conductivity, and mix the thermally conductive adhesive and the filler in a mixer in a certain proportion until a uniform paste is obtained. Use a coating device to evenly coat the mixed paste onto one side of the aluminum foil layer, and then dry or cure it.

[0108] ④ Preparation of conductive adhesive layer 4:

[0109] In the mixer, conductive adhesive and conductive particles are mixed in proportion until a uniform conductive adhesive is obtained; the mixed conductive adhesive is evenly applied to the other side of the aluminum foil layer that has been coated with thermal interface material using a coating device; then drying or curing is performed.

[0110] ⑤ Preparation of pressure-sensitive adhesive layer 7:

[0111] Using an adhesive applicator, the pressure-sensitive adhesive is evenly applied to the thermal interface material layer; the pressure-sensitive adhesive is then cured by drying or UV curing.

[0112] ⑥ Add protective layer 8:

[0113] The protective layer 8 is pressed onto the top of the conductive adhesive layer using lamination technology;

[0114] ⑦ Cutting and Packaging:

[0115] Use a cutter to cut the prepared tape to the required width and length; finally, wind the tape onto the paper core and then package it.

[0116] Tests have shown that the electrical conductivity and thermal conductivity of the aluminum foil tape of this invention are superior to those of mainstream products on the market. The test results are as follows:

[0117] Test conditions:

[0118] Temperature: 25℃;

[0119] Relative humidity: 50%;

[0120] Testing equipment: High-precision four-probe conductivity meter; thermal conductivity meter;

[0121] Sample size: 10cm x 10cm;

[0122] The following are comparative data under given experimental conditions:

[0123]

[0124] Electrical conductivity:

[0125] Tests 1-6 generally outperformed mainstream products A and B in terms of conductivity. In particular, tests 3 and 6 had a higher silver particle content, resulting in the highest conductivity (6350 S / m and 6400 S / m, respectively).

[0126] Thermal conductivity:

[0127] They also performed well in terms of thermal conductivity. Experiments 3 and 6 used carbon nanotubes as fillers in the thermal interface material layer and obtained the highest thermal conductivity values, which were 20 W / m·K and 22 W / m·K, respectively.

[0128] In contrast, the thermal conductivity of mainstream products A and B is 10 W / m·K and 9 W / m·K, respectively, which is far lower than that of the aluminum foil tape of this invention.

[0129] Polyethylene and polypropylene, as protective layer materials, combined with high content of silver particles and carbon nanotubes, exhibited the best overall performance (test numbers 2 and 3).

[0130] in conclusion:

[0131] The aluminum foil tape of the present invention is significantly superior to the current mainstream products A and B in terms of electrical conductivity and thermal conductivity.

[0132] By rationally selecting protective layer materials, adjusting the silver particle content of the conductive adhesive layer, and selecting fillers for the thermal interface material layer, it is possible to further optimize the performance.

[0133] Considering the importance of thermal conductivity and electrical conductivity for certain applications (such as cooling of electronic devices or conductive connections), the aluminum foil tape of the present invention has a significant competitive advantage in the market.

[0134] Example 2:

[0135] See Figure 2-4 In step ④, the conductive particles are pre-treated by a raw material grinding machine. The raw material grinding machine includes a grinding cylinder 31, a lower grinding disc 34 is provided at the upper end of the inner cavity of the grinding cylinder 31, a grinding mechanism 33 is provided above the lower grinding disc 34, a vibrating screen 310 is provided below the grinding mechanism 33, a second discharge hole 311 is provided on the outer side of the vibrating screen 310, a vibrating motor 311 is provided on the lower surface of the vibrating screen 310, a collection box 36 is connected to the lower outer end of the grinding cylinder 31, and the collection box 36 is connected to the vibrating screen 310 through the second discharge hole 311. A lifting channel 35 is connected to the upper surface of the collection box 36, and a discharge pipe 312 is connected to the upper end of one side of the lifting channel 35. A circulation mechanism 37 is provided in the inner cavity of the lifting channel 35.

[0136] The circulation mechanism 7 includes a second motor 371 fixedly connected to the lower surface of the collection box 36, and the output shaft of the second motor 371 is driven to a second rotating shaft 372. The upper end of the second rotating shaft 372 passes through the collection box 36 and is driven to a lifting auger 373. The upper end of the lifting auger 373 is rotatably connected to the top of the inner cavity of the lifting channel 35.

[0137] A positioning disk 38 is provided in the middle of the inner cavity of the grinding cylinder 1, and multiple sets of material discharge holes 39 are provided on the upper surface of the positioning disk 38. A first material discharge hole 341 is provided at the lower end of the lower grinding disk 34. The multiple sets of material discharge holes 39 facilitate the grinding of the raw material to fall into the vibrating screen disk 310 for vibration screening.

[0138] The grinding mechanism 3 includes a first motor 331 fixedly connected to the middle of the lower surface of the positioning disk 38. The output shaft of the first motor 331 is driven to a first rotating shaft 332, and a sealing cone plate 334 is fixedly connected to the upper end of the first rotating shaft 332. The first motor 331 drives the first rotating shaft 332 to rotate the sealing cone plate 334, so that the sealing cone plate 334 synchronously drives the upper grinding disk 336 to rotate, thereby improving the grinding stability between the upper grinding disk 336 and the lower grinding disk 34.

[0139] The grinding mechanism 33 also includes an upper grinding disc 336 and multiple sets of connecting screws 335. A sealing cone plate 334 is positioned directly above the upper grinding disc 336 and is fixedly connected to the upper grinding disc 336 by multiple sets of connecting screws 335. A limiting hole 337 is provided at the lower end of the upper grinding disc 336 for the first rotating shaft 332 to pass through. The upper grinding disc 336 and the lower grinding disc 34 facilitate the grinding of the adhesive raw material, thereby improving the grinding efficiency of the adhesive raw material.

[0140] Two sets of limiting blocks 333 are symmetrically welded on the outer side of the first rotating shaft 332, and both sets of limiting blocks 333 fit into the limiting hole 337. The outer diameter of the upper grinding disc 336 is smaller than the inner diameter of the lower grinding disc 34. The limiting blocks 333 improve the stability of the upper grinding disc 336 when it rotates and improve the grinding efficiency.

[0141] The lower end of the grinding cylinder 31 is connected to a conical discharge cylinder 32, and multiple sets of support legs are welded to the upper end of the outer side of the conical discharge cylinder 32. The conical discharge cylinder 32 facilitates the collection of the adhesive raw material powder screened by the vibrating screen 310, thereby improving the collection efficiency of the raw material powder.

[0142] The lower surface of the vibrating screen 310 is intersected with the horizontal plane, and multiple sets of sieve holes are opened at the bottom of the inner cavity of the vibrating screen 310. The vibrating screen 310 facilitates the screening of raw material powder, thereby obtaining raw materials with uniform powder particle size and improving the quality of adhesive preparation.

[0143] In use, the raw materials for preparing the adhesive solution are poured into the grinding cylinder 31. The raw materials enter the space between the upper grinding disc 336 and the lower grinding disc 34 through the gap between them. The first motor 331 drives the first rotating shaft 332 to rotate the upper grinding disc 336, thereby grinding the raw materials between the upper grinding disc 336 and the lower grinding disc 34. At the same time, the sealing cone plate 334 moves the raw materials closer to the inner wall of the grinding cylinder 31, thereby improving the grinding efficiency. The ground raw materials fall onto the positioning plate 38 through the first discharge hole 341 and onto the vibrating screen through the discharge hole 39 on the positioning plate 38. On the screen 310, the vibrating motor 311 drives the vibrating screen 310 to vibrate and screen the raw materials. The raw materials with qualified particle size are collected through the conical discharge cylinder 32. The raw material particles with a particle size larger than the inner diameter of the screen hole of the vibrating screen 310 are collected in the collection box through the second discharge hole 311 by the vibrating motor 311 and gravity. The second motor 371 drives the second rotating shaft 372 to drive the lifting auger 373 to transport the raw materials upward and drop them into the grinding cylinder 31 again through the discharge pipe 312, so as to facilitate secondary grinding of the raw materials, improve the grinding efficiency of the raw materials, and improve the quality of the prepared adhesive.

[0144] Example 3:

[0145] See Figure 5-12 In the manufacturing of aluminum foil tape, the choice of coating method is crucial because it affects the tape's performance, cost, and production efficiency. In aluminum foil tape manufacturing, coating rollers are not suitable; instead, brush coating is preferred.

[0146] Surface smoothness:

[0147] The surface of aluminum foil is very smooth. When applying adhesive using a roller, air bubbles or uneven application can easily form on such a smooth surface, leading to unstable adhesion of the tape. Brush application is better suited to the surface characteristics of aluminum foil, using the brush's texture to evenly spread the adhesive and reduce air bubble formation.

[0148] Uniformity of adhesive application:

[0149] Brush coating, due to the characteristics of the brush bristles, can form a more uniform adhesive layer during the application process, which is crucial for the bonding quality and durability of the tape. Because the surface of aluminum foil is relatively smooth, its adhesion to adhesive rollers is relatively low, making uneven adhesive application more likely.

[0150] Control the amount of adhesive applied:

[0151] Brush application makes it easier to control the amount of adhesive applied, especially when different thicknesses of adhesive need to be applied to aluminum foil. Adhesive rollers typically have a fixed thickness, making it difficult to adjust the application thickness.

[0152] The brittleness of aluminum foil:

[0153] Aluminum foil is relatively brittle and easily breaks. During the coating process with a glue roller, an adhesive pull is generated between the roller and the aluminum foil, which creates an additional mechanical pull perpendicular to the aluminum foil surface, causing the foil to bend and increasing the risk of breakage. In contrast, when using a brush to coat the foil, the pull generated by the glue and brush bristles is almost parallel to the aluminum foil surface, thus reducing the likelihood of vertical force and ensuring the safety of the aluminum foil.

[0154] In summary, considering the characteristics of aluminum foil, the uniformity and quantity control of adhesive coating, and the cleaning and maintenance of equipment, brush coating is more suitable for the manufacturing process of aluminum foil tape. Therefore, a brush coating mechanism is used in steps ③, ④, and ⑤. This mechanism includes a non-magnetic material fixing block 21 and a ferromagnetic deflector block 22 positioned below the non-magnetic material fixing block 21. Side electromagnets 24 are respectively arranged on both sides of the ferromagnetic deflector block 22. The side electromagnets 24 switch their magnetic pole directions to drive the ferromagnetic deflector block 22 to repeatedly move laterally. The non-magnetic material fixing block 21 has multiple vertically penetrating upper adhesive channels 210 spaced along the length of the tape base 1. The ferromagnetic deflector... Block 22 has multiple vertically connected lower adhesive channels 220 corresponding to the upper adhesive channel 210; the ferromagnetic deflector block 22 repeatedly connects the lower adhesive channels 220 with the upper adhesive channels 210 during repeated lateral movements; the horizontal cross-section of the upper adhesive channel 210 and the lower adhesive channel 220 is a long strip with the same length as the width of the tape base 1; the upper adhesive channel 210 is connected to the external pressure injection tube 27; the bottom of the ferromagnetic deflector block 22 is provided with an adhesive layer 25; a smooth support plane 28 is provided below the tape base 1.

[0155] Furthermore, the upper glue channel 210 includes an upper glue inlet 211 and an upper glue outlet 212; an upper glue cavity 213 is formed in the non-magnetic material fixing block 21 between the upper glue inlet 211 and the glue outlet 212; the lower glue channel 220 includes a lower glue inlet 221 and a lower glue outlet 222.

[0156] Furthermore, the upper glue cavity 213 is spherical or ellipsoidal; a detachable highly elastic glue tube 214 is provided inside the upper glue channel 210; the upper opening of the highly elastic glue tube 214 is fixed at the upper glue inlet 211, and the lower opening is fixed at the upper glue outlet 212; when the upper glue outlet 212 is blocked, the pressurized glue liquid gathers in the middle of the highly elastic glue tube 214, causing the middle of the highly elastic glue tube 214 to bulge and tightly adhere to the upper glue cavity 213, and when the upper glue outlet 212 is unblocked, the restoring force of the highly elastic glue tube 214 combined with the external pressurized glue injection force is used to squeeze the glue liquid downward from the lower glue channel 220.

[0157] Furthermore, the non-magnetic material fixing block 21 includes an upper fixing block 215, a lower moving block 216, and a side fixing block 217 arranged sequentially; the lower moving block 216 is disposed below the upper fixing block 215 and can slide relative to the upper fixing block 215 in the horizontal direction; the thickness of the side fixing block 217 is the sum of the thickness of the upper fixing block 215 and the lower moving block 216; the distance between the upper opposing surfaces of the upper fixing block 215 and the side fixing block 217 is arranged to form the upper glue inlet 211; the lower moving block 216 moves in conjunction with the ferromagnetic deflector block 22. The lower moving block 216 and the side fixing block 217 enclose the upper glue outlet 212; when the ferromagnetic deflecting block 22 moves to the position where the lower glue inlet 221 and the upper glue outlet 212 are opposite each other, the end face of the lower moving block 216 is flush with the end face of the upper fixing block 215 and the upper glue outlet 212 is open; when the ferromagnetic deflecting block 22 moves to the position where the lower glue inlet 221 and the upper glue outlet 212 are misaligned, the end face of the lower moving block 216 approaches the end face of the side fixing block 217, thereby squeezing and sealing the lower opening of the strong elastic tube 214 to prevent glue leakage.

[0158] Furthermore, the lower moving block 216 and the upper fixed block 215, as well as the ferromagnetic deflecting block 22 and the bottom surface of the side fixed block 217, are respectively guided by sliding grooves.

[0159] Furthermore, the magnetic deflection block 22 is fixedly sleeved with outwardly extending non-magnetic sleeves 26 at both ends; the side electromagnet 24 is slidably sleeved with the non-magnetic sleeves 26.

[0160] Furthermore, the upper end faces of the upper fixing block 215 and the side fixing block 217 at the upper glue inlet 211, and the lower end faces of the lower moving block 216 and the side fixing block 217 at the upper glue outlet 212 are respectively provided with detachable pressure plates 218 to clamp and fix the highly elastic glue tube 214.

[0161] Furthermore, height-adjustable upper electromagnets 23 are fixedly installed above the non-magnetic material fixing block 21 near its two ends; the upper electromagnets 23 attract ferromagnetic deflection blocks 22 through the non-magnetic material fixing block 21 to balance its gravity.

[0162] Furthermore, there are multiple lower glue outlets 222, which are connected to the lower glue inlet 221 through branch channels 223; a diversion block 224 is fixedly provided at the position of the lower glue outlet 222 to disperse the glue into each branch channel 223; the glue layer 25 is planar.

[0163] Furthermore, along the conveying direction of the adhesive tape base 1, multiple adhesive coating mechanisms are provided, and the side electromagnets 24 of each adhesive coating mechanism are controllable to ensure that the adhesive is applied evenly and comprehensively to the adhesive tape base 1.

[0164] The adhesive application mechanism primarily controls the supply and application of adhesive by electromagnetically driving a ferromagnetic deflector block. The specific working principle is as follows:

[0165] Electromagnetic drive: The side electromagnet 24 of the glue coating mechanism switches the direction of the magnetic poles, causing the ferromagnetic deflector block 22 to move repeatedly laterally.

[0166] Adhesive supply and control:

[0167] When the ferromagnetic deflector 22 moves, its lower adhesive channel 220 connects with the upper adhesive channel 210 in the non-magnetic material fixing block 21, allowing the adhesive to pass through.

[0168] The highly elastic tube 214 acts as a temporary storage inside the upper adhesive channel 210. When the upper outlet 212 is blocked, the adhesive will accumulate inside the highly elastic tube 214, causing it to expand in the middle. When the upper outlet 212 is opened, the restoring force of the highly elastic tube 214, combined with external pressure, will squeeze the adhesive downward.

[0169] Adhesive application: The adhesive is applied to the base tape 1 through the lower adhesive channel 220, while the adhesive layer 25 ensures that the adhesive is evenly applied to the tape.

[0170] Movement and enclosure mechanisms:

[0171] The movement of the lower moving block 216 is linked with that of the ferromagnetic deflector block 22. This means that when the ferromagnetic deflector block 22 is in a certain position, the lower moving block 216 will block or open the lower opening of the strong elastic tube 214.

[0172] When the position of the ferromagnetic deflector 22 is aligned with the upper dispensing port 212, the adhesive can flow out; when the positions are misaligned, the flow of the adhesive is blocked.

[0173] Guiding and limiting: The slide provides sliding limiting guidance between the ferromagnetic deflector block 22 and the non-magnetic material fixing block 21, ensuring the stability and accuracy of the entire mechanism.

[0174] Adhesive diversion: Since there are multiple lower adhesive outlets 222, and they are all connected to the lower adhesive inlet 221 through branch channels 223, the diversion block 224 ensures that the adhesive can be evenly dispersed into each branch channel.

[0175] Balance and support: The upper electromagnet 23 is set to attract the ferromagnetic deflector block 22, which not only balances its gravity but also increases the stability of the entire mechanism.

[0176] Uniform application of adhesive by multiple coating mechanisms: There are multiple coating mechanisms arranged along the transmission direction of the tape base 1. The side electromagnets 24 of each coating mechanism can be controlled individually to ensure that the adhesive on the tape is applied evenly and comprehensively.

[0177] Through the above design, the adhesive coating mechanism achieves efficient supply, control and application of adhesive, ensuring the uniformity and comprehensiveness of adhesive application on the tape base.

[0178] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An apparatus for preparing aluminum foil tape with high electrical and thermal conductivity, characterized in that: The aluminum foil tape includes: Protective layer (8): This is the outermost layer of the tape, designed to protect the aluminum foil from damage or oxidation; Conductive adhesive layer (4): Located above the aluminum foil layer, it consists of adhesive with added conductive particles to further improve the conductivity of the tape; Aluminum foil layer (5): Located below the conductive adhesive layer (4), it is made of high-purity aluminum material and serves as the main conductive and thermal conductive layer of the tape; Thermal interface material layer (6): It is attached to the bottom of the aluminum foil layer (5); it is made of a filler with high thermal conductivity and added to the thermally conductive adhesive, mainly responsible for the thermal conductivity of the tape; Pressure-sensitive adhesive layer (7): Located at the bottom of the tape, it contacts the surface of the application and provides adhesion; The preparation apparatus includes a coating mechanism, which includes a non-magnetic material fixing block (21) and a ferromagnetic deflector block (22) disposed below the non-magnetic material fixing block (21); side electromagnets (24) are respectively disposed on both sides of the ferromagnetic deflector block (22); the side electromagnets (24) switch the magnetic pole direction to drive the ferromagnetic deflector block (22) to move horizontally repeatedly; the non-magnetic material fixing block (21) has multiple vertically penetrating upper adhesive channels (210) spaced apart along the length of the adhesive tape base (1); the ferromagnetic deflector block (22) corresponds to the upper... The adhesive channel (210) has multiple vertically connected lower adhesive channels (220); the ferromagnetic deflector (22) repeatedly connects the lower adhesive channels (220) with the upper adhesive channels (210) during repeated lateral movements; the horizontal cross-sections of the upper adhesive channels (210) and the lower adhesive channels (220) are both elongated strips with the same length as the width of the adhesive tape base (1); the upper adhesive channel (210) is connected to the external pressure injection tube (27); a brushed adhesive layer (25) is provided at the bottom of the ferromagnetic deflector (22); a smooth support plane (28) is provided below the adhesive tape base (1); The upper glue channel (210) includes an upper glue inlet (211) and an upper glue outlet (212); an upper glue cavity (213) is formed in the non-magnetic material fixing block (21) between the upper glue inlet (211) and the glue outlet (212); the lower glue channel (220) includes a lower glue inlet (221) and a lower glue outlet (222); The upper glue cavity (213) is spherical or ellipsoidal; a detachable highly elastic glue tube (214) is provided inside the upper glue channel (210); the upper opening of the highly elastic glue tube (214) is fixed at the upper glue inlet (211), and the lower opening is fixed at the upper glue outlet (212); when the upper glue outlet (212) is blocked, the pressurized glue liquid gathers in the middle of the highly elastic glue tube (214), causing the middle of the highly elastic glue tube (214) to bulge and tightly adhere to the upper glue cavity (213), and when the upper glue outlet (212) is unblocked, the restoring force of the highly elastic glue tube (214) combined with the external pressurized glue injection force is used to squeeze the glue liquid downward from the lower glue channel (220).

2. The apparatus for preparing aluminum foil tape with high electrical conductivity and thermal conductivity as described in claim 1, characterized in that, The conductive particles are pretreated by a raw material grinding machine, which includes a grinding cylinder (31). The grinding cylinder (31) is characterized in that: a lower grinding disc (34) is provided at the upper end of the inner cavity of the grinding cylinder (31), and a grinding mechanism (33) is provided above the lower grinding disc (34). A vibrating screen (310) is provided below the grinding mechanism (33). A second discharge hole (311) is provided on the outer side of the vibrating screen (310). A vibrating motor (311) is provided on the lower surface of the vibrating screen (310). A collection box (36) is connected to the lower end of the outer side of the grinding cylinder (31), and the collection box (36) is connected to the vibrating screen (310) through the second discharge hole (311). A lifting channel (35) is connected to the upper surface of the collection box (36), and a discharge pipe (312) is connected to the upper end of one side of the lifting channel (35). A circulation mechanism (37) is provided in the inner cavity of the lifting channel (35). The circulation mechanism (37) includes a second motor (371) fixedly connected to the lower surface of the collection box (36), and the output shaft of the second motor (371) is driven to a second rotating shaft (372). The upper end of the second rotating shaft (372) passes through the collection box (36) and is driven to a lifting auger (373). The upper end of the lifting auger (373) is rotatably connected to the top of the inner cavity of the lifting channel (35).

3. The apparatus for preparing aluminum foil tape with high electrical conductivity and thermal conductivity as described in claim 2, characterized in that, The grinding cylinder (31) has a positioning plate (38) in the middle of its inner cavity, and the upper surface of the positioning plate (38) has multiple sets of material discharge holes (39). The lower end of the lower grinding plate (34) has a first material discharge hole (341).

4. The apparatus for preparing aluminum foil tape with high electrical conductivity and thermal conductivity as described in claim 3, characterized in that, The grinding mechanism (33) includes a first motor (331) fixedly connected to the middle of the lower surface of the positioning disk (38). The output shaft of the first motor (331) is connected to a first rotating shaft (332), and a sealing cone plate (334) is fixedly connected to the upper end of the first rotating shaft (332).

5. The apparatus for preparing aluminum foil tape with high electrical conductivity and thermal conductivity as described in claim 4, characterized in that, The grinding mechanism (33) also includes an upper grinding disc (336) and multiple sets of connecting screws (335). The sealing cone plate (334) is located directly above the upper grinding disc (336) and is fixedly connected to the upper grinding disc (336) by multiple sets of connecting screws (335). The lower end of the upper grinding disc (336) is provided with a limiting hole (337) through which the first rotating shaft (332) passes.

6. The apparatus for preparing aluminum foil tape with high electrical conductivity and thermal conductivity as described in claim 5, characterized in that, Two sets of limiting blocks (333) are symmetrically welded on the outer side of the first rotating shaft (332), and both sets of limiting blocks (333) fit into the limiting hole (337). The outer diameter of the upper grinding disc (336) is smaller than the inner diameter of the lower grinding disc (34).

7. The apparatus for preparing aluminum foil tape with high electrical conductivity and thermal conductivity as described in claim 2, characterized in that, The lower end of the grinding cylinder (31) is connected to a conical discharge cylinder (32), and multiple sets of support legs are welded to the upper end of the outer side of the conical discharge cylinder (32).

8. The apparatus for preparing aluminum foil tape with high electrical conductivity and thermal conductivity as described in claim 2, characterized in that, The lower surface of the vibrating screen disk (310) is intersected with the horizontal plane, and multiple sets of screen holes are opened at the bottom of the inner cavity of the vibrating screen disk (310).

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