Super-thick conductive wrapping foam machine pasting roll material processing method and application

Abstract

The invention relates to a super-thick conductive wrapping foam machine pasting roll material processing method and application, and the processing method comprises the following steps: selecting a release film with the specification of 200-300G as a bearing substrate, splicing and fixing strip-shaped super-thick conductive wrapping foams on the release film according to a preset interval, and forming a whole plate of to-be-processed material; covering the surface of the whole to-be-processed material with a layer of protective film, and atomizing and spraying a release agent on the surface of the protective film; and a black steel blade is adopted for conducting vibration cutting on the whole to-be-machined material, and the slit super-thick conductive wrapping foam of the preset size is prepared and obtained. Thus, through the multi-dimensional synergistic effect of bearing supporting, surface protection and cutting adaptation, the problem of S-shaped deformation caused by insufficient bottom supporting when the super-thick conductive wrapping foam is cut is effectively solved, and meanwhile broken filament residues are reduced through the isolation and lubrication effect of the release agent.

Description

Technical Field

[0001] This invention relates to the field of foam bonding technology, and in particular to a method and application for processing ultra-thick conductive wrapped foam rolls. Background Technology

[0002] With the increasing prevalence of automated production in the electronics industry, conductive foam, as a key electromagnetic shielding and buffering component, is experiencing a growing demand for automated placement. Machine-mounted rolls have become the mainstream application due to their suitability for assembly line operations. Conductive foam typically consists of a strip-shaped foam core wrapped with an outer layer of conductive fabric, playing a crucial role in electronic devices, communication terminals, and other products. As automation in the electronics industry becomes more widespread, the placement of conductive foam is also gradually evolving towards automation, leading to a growing demand for machine-mounted rolls. However, current processing technologies for small-sized, ultra-thick conductive foam (e.g., 18×18mm in length, width, and height) suffer from severe edge deformation during cutting, resulting in uncontrollable S-shaped edges, large dimensional fluctuations (tolerances greater than ±0.5mm), and poor product consistency, failing to meet the requirements of automated placement.

[0003] Existing technology first arranges the strips of conductive foam according to the spacing of the drawing, such as... Figure 1 As shown, the conductive foam 11 is bonded to the release film 13 by the conductive adhesive layer 12. The conductive foam 11 is conveyed to the delivery release film by the pull of the lower release film 13, and then cut by the cutter 10. The feed speed of the lower delivery release film is greater than the speed of the release film, achieving asynchronous opening of the product spacing. When the product thickness is greater than 18mm and the length and width are both 18mm, irregular S-shaped deformation will appear on the side during product cutting, such as... Figure 2 As shown, the inconsistent product shapes make it impossible to produce rolls that meet the precision requirements of automated mounting. Because the thickness of the foam-wrapped products is over 18mm, and the length and width are both 18mm, the bottom area is small and the product thickness is high during the cutting process, resulting in insufficient product support and causing the products to tilt.

[0004] In addition, existing cutting methods mostly cut along the height of the product. For ultra-thick products, the heat generated by the blade during the cutting process can easily cause the conductive fabric to stick to the foam core, resulting in lint residue, which further affects product quality. At the same time, the traditional blade structure is not adaptable enough, which aggravates the problem of cutting deformation, resulting in low production yield and low efficiency, making it difficult to achieve mass production.

[0005] Therefore, developing a process that can solve the defects in the processing of small-sized, ultra-thick conductive foam rolls while balancing precision and efficiency has become a pressing technical problem for the industry. Summary of the Invention

[0006] Therefore, it is necessary to provide a method and application for processing ultra-thick conductive foam rolls that can solve the problem of S-shaped deformation during product cutting, resolve the issue of apparent residue, and improve product quality.

[0007] This application provides a method for processing ultra-thick conductive wrapped foam rolls, including the following steps: Substrate pretreatment: Select a 200-300G release film as the carrier substrate, and splice and fix strip-shaped ultra-thick conductive foam at a preset interval on the release film to form a whole plate of material to be processed; wherein, the thickness of the ultra-thick conductive foam is ≥18mm; Cutting pretreatment: Cover the surface of the whole plate of material to be processed with a protective film, the substrate of the protective film being PET or PE; spray a release agent onto the surface of the protective film by atomization; Cutting operation: The whole plate of material to be processed is vibrated and cut using a steel blade to prepare ultra-thick conductive foam of a preset size after cutting.

[0008] In one embodiment, the thickness of the protective film is 0.05 mm.

[0009] In one embodiment, the spraying distance of the release agent is 20-30cm, and the amount of release agent used per square meter of protective film is controlled at 0.2-0.3mL. The main component of the release agent is polysiloxane.

[0010] In one embodiment, the blade has a cutting edge angle of 21°, a thickness of 0.3 mm, a length of 30 mm, and a width of 6 mm.

[0011] In one embodiment, the amplitude of the vibration cutting is controlled at 0.1-0.3 mm, and the cutting frequency is 50-80 Hz.

[0012] In one embodiment, the strip-shaped ultra-thick conductive foam is composed of a foam core and an outer layer of conductive fabric.

[0013] In one embodiment, after the cutting operation, the processing method further includes the following steps: Finished product processing: The ultra-thick conductive foam of the pre-cut size is automatically aligned and pasted by CCD equipment to form machine-applied rolls that meet the requirements of automated application.

[0014] In one embodiment, the product tolerance of the machine-applied roll material is ≤ ±0.5 mm, and the yield is ≥ 99%.

[0015] This application also provides an ultra-thick conductive wrapped foam machine-applied roll material, characterized in that it is prepared by the processing method described in any of the above embodiments.

[0016] Applications of ultra-thick conductive foam machine-applied rolls as described in any of the above embodiments in electromagnetic shielding or buffer components of electronic devices and communication terminals.

[0017] The above-mentioned method for processing ultra-thick conductive foam rolls utilizes a 200-300G release film to support and splice together strips of ultra-thick conductive foam (thickness ≥18mm). This is combined with protective film coverage and atomized release agent spraying, along with vibratory cutting using a steel blade. This multi-dimensional approach, addressing load-bearing support, surface protection, and cutting adaptability, effectively solves the S-shaped deformation problem caused by insufficient bottom support during ultra-thick conductive foam cutting. Simultaneously, the release agent's isolation and lubrication reduce lint residue, significantly improving product dimensional consistency and surface cleanliness, fundamentally improving product quality and meeting the core requirements of precision and quality in automated assembly. In a preferred embodiment, the protective film thickness is 0.05mm. Its main components are: substrate: PET (polyester), PE (polyethylene). Its main function is physical protection, preventing the conductive foam surface from being contaminated with release agent ink, while also preventing adhesive sticking during cutting, thus improving efficiency and quality. Before cutting, a protective film is applied to the material surface, and a release agent is sprayed onto the protective film before processing and cutting, preventing lint and blade overheating. Before cutting, a protective film is applied to the material surface. A release agent is then sprayed onto the protective film before cutting, preventing lint buildup and blade overheating. Custom-made special steel blades are used, with a 21-degree blade angle, 0.3mm thickness, a length of 30mm, and a width of 6mm. Using this method, production efficiency is 30 times higher than traditional methods, and the yield rate is increased to 99%, a 20% improvement over previous methods. This overcomes the current limitations of existing technologies in processing ultra-thick conductive foam, which suffers from deformation, wrinkles, low yield, and low efficiency. This technology can also be extended to similar ultra-thick machine-applied roll products. It solves the problem of severe edge deformation in existing technologies when processing small-sized ultra-thick conductive foam, failing to meet the requirements of automated machine-applied rolls. The products produced by this invention have stable dimensions, and the automatic application process using CCD equipment can produce rolls that meet the precision requirements of automated machine application. Attached Figure Description

[0018] Figure 1 A schematic diagram of the cutting process for a traditional ultra-thick conductive foam. Figure 2 This is a product image showing the cut-out of a traditional ultra-thick conductive foam. Figure 3 This is a photograph of a strip of ultra-thick conductive foam spliced ​​onto a release film in a method for processing ultra-thick conductive foam rolls according to an embodiment of the present invention. Figure 4 This is a schematic diagram illustrating the cutting operation to obtain ultra-thick conductive wrapped foam of a preset size in the ultra-thick conductive wrapped foam machine roll processing method according to an embodiment of the present invention. Figure 5 This is a photograph of a single ultra-thick conductive foam of a preset size obtained from the cutting operation in the ultra-thick conductive foam wrapping machine processing method of an embodiment of the present invention. Detailed Implementation

[0019] To facilitate understanding of the present invention and to make the above-mentioned objects, features, and advantages of the present invention more apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention, and preferred embodiments are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. The present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention; therefore, the present invention is not limited to the specific embodiments disclosed below. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. In the description of the present invention, "a number" means at least one, such as one, two, etc., unless otherwise explicitly specified. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] This application provides a method for processing ultra-thick conductive wrapped foam rolls, including the following steps S1-S3: S1. Substrate pretreatment: Select a 200-300G release film as the carrier substrate, and splice and fix strip-shaped ultra-thick conductive foam at a preset interval on the release film to form a whole plate of material to be processed; wherein, the thickness of the ultra-thick conductive foam is ≥18mm; For example, the ultra-thick conductive foam has a small size structure with a length and width of ≤18×18mm, a height-to-width ratio of >160%, and a thickness of ≥18mm; for example, the strip-shaped ultra-thick conductive foam is fixed to the release film by bonding and splicing at a preset interval.

[0021] like Figure 3 As shown, this involves splicing long strips of conductive foam onto a 200-300g release film to form a single sheet. By splicing and fixing strips of ultra-thick conductive foam at preset intervals onto the release film using traditional methods, a single sheet of material is formed for processing. The use of a 200-300g release film as a supporting substrate effectively solves the problem of insufficient product support, ensuring that the product is less prone to tilting and defects during cutting, and also improving production efficiency. For example, the ultra-thick conductive foam strips consist of a foam core and an outer layer of conductive fabric. This clearly defines the core structure of the ultra-thick conductive foam strips, ensuring that the processing method is precisely adapted to the typical structure of a foam core + conductive fabric. Through matching the process and material structure, problems such as loosening and fraying of the conductive fabric during cutting are effectively avoided, further improving the overall product quality.

[0022] It should be noted that in existing technologies, for small-sized ultra-thick conductive foam with an aspect ratio >160% (e.g., 18×18×18mm), in addition to S-shaped deformation and lint residue issues, there are two major unresolved technical bottlenecks: First, the traditional release film (≤150G) has insufficient load-bearing strength, and the spliced ​​foam is prone to local collapse during cutting, causing adjacent products to be squeezed and deformed; second, the friction between the blade and the conductive fabric during the cutting process generates static electricity, attracting lint residue on the product surface, which further damages the foam structure in subsequent cleaning processes, leading to a further decrease in yield (usually below 75%). In addition, existing technologies lack a specific solution for "heat conduction during ultra-thick foam cutting." Blade heating causes local softening of the foam core, leading to damage to the internal pore structure and affecting electromagnetic shielding performance (shielding effectiveness decreases by 10-15dB). These problems together result in the automated mounting pass rate of ultra-thick conductive foam being below 60% for a long time, severely restricting its application in high-end electronic devices. This application selects a 200-300G release film with a precise design based on the mechanical properties of ultra-thick foam: Experimental verification shows that release films below 150G have a flexural strength <2.5MPa, which cannot support the cutting stress of 18mm thick foam and is prone to localized deformation; while the 200-300G release film has a flexural strength of 3.8-5.2MPa, providing sufficient support to suppress tilting deformation, and also possessing moderate flexibility to adapt to subsequent roll-up processes. Simultaneously, the surface tension of this release film is controlled at 28-32mN / m, enabling stable adhesion to the conductive adhesive layer at the bottom of the foam and preventing foam displacement during cutting. Traditional release films (>300G) have excessive surface tension, leading to difficulties in subsequent product peeling and damaging the integrity of the conductive adhesive layer.

[0023] S2. Cutting pretreatment: Cover the surface of the entire sheet of material to be processed with a protective film, the base material of the protective film being PET or PE; spray a release agent onto the surface of the protective film by atomization; By covering the material surface with a protective film before cutting, and then spraying a release agent onto the protective film before processing and cutting, lint and blade overheating can be prevented. For example, the thickness of the protective film is 0.05mm. By limiting the thickness of the protective film to 0.05mm, physical protection can be achieved on the surface of the ultra-thick conductive foam, avoiding oil stain defects caused by release agent contamination. At the same time, it can ensure the fit and non-stick effect during cutting, achieving an optimal balance between protection and processing adaptability, further ensuring product surface quality and cutting efficiency.

[0024] In one embodiment, the release agent is sprayed at a distance of 20-30cm, and the amount of release agent used per square meter of protective film is controlled at 0.2-0.3mL. The main component of the release agent is polysiloxane. This ensures that the release agent is evenly distributed on the surface of the protective film, which can fully utilize the lubricating and release properties of polysiloxane to completely solve the problems of lint residue and adhesive during the cutting process. It can also avoid oil spot defects caused by excessive spraying or residual adhesive problems caused by insufficient spraying, providing a key guarantee for product quality stability. Regarding the foam thickness and the amount of the protective film and release agent, a spraying distance of 20-30cm from the surface of the protective film can ensure even distribution of the release agent. The amount used per square meter is controlled at 0.2-0.3mL. If there is residual adhesive on the surface of the conductive foam product after cutting, it is because the amount of lint sprayed is insufficient; if oil spots or marks appear on the product surface, affecting product quality, it may be because the amount of sprayed is too large! The thicker the foam, the more the amount of sprayed should be increased and the cutting speed reduced.

[0025] In this application, the 0.05mm thick PET / PE protective film not only prevents mold release agent contamination of the foam, but its thermal conductivity also allows for rapid conduction of heat generated during cutting, preventing softening of the foam core. Meanwhile, the atomized spraying process of the polysiloxane mold release agent (spraying distance 20-30cm, dosage 0.2-0.3mL / ㎡) forms a uniform isolation layer of 0.5-1μm thickness on the protective film surface. This reduces the friction coefficient between the blade and the material, minimizing fuzz formation, and further suppresses S-shaped deformation by dispersing cutting stress through the lubricating effect of the siloxane molecules. Experiments have shown that if only the protective film or only the mold release agent is used, the amount of residual fuzz increases by 3-5 times, and the deformation exceeds ±0.8mm, failing to meet accuracy requirements. The synergistic effect of both is key to solving the technical problem.

[0026] S3. Cutting operation: The whole plate of material to be processed is vibrated and cut using a steel blade to obtain ultra-thick conductive foam of a preset size after cutting.

[0027] In one embodiment, the steel blade has a cutting edge angle of 21°, a thickness of 0.3mm, a length of 30mm, and a width of 6mm. Thus, by defining specific dimensional parameters for the steel blade—a cutting edge angle of 21°, a thickness of 0.3mm, a length of 30mm, and a width of 6mm—the blade possesses the cutting sharpness and structural strength suitable for ultra-thick conductive foam, reducing stress concentration and blade heating during cutting, further suppressing S-shaped deformation of the product edge, and improving the flatness and dimensional accuracy of the cut surface.

[0028] In one embodiment, the vibration cutting amplitude is controlled at 0.1-0.3 mm, and the cutting frequency is 50-80 Hz. This reduces the contact resistance between the blade and the material through the characteristics of vibration cutting, minimizing the compression and deformation of the ultra-thick foam during cutting. It also avoids product damage or edge burrs caused by improper amplitude or frequency, ensuring the stability of the cutting process and product consistency.

[0029] The custom-designed steel blades in this application feature a 21° blade angle and a 0.3mm thickness, precisely matched with the vibration cutting parameters (0.1-0.3mm amplitude, 50-80Hz frequency). The 21° blade angle is the optimal angle for cutting ultra-thick foam, compared to the traditional 15° blade angle (high cutting resistance, easily compressing the foam) and 30° blade angle (incomplete cutting, easily producing burrs). This allows for rapid entry while reducing lateral pressure on the foam. The 0.3mm blade thickness, combined with the 0.1-0.3mm amplitude, shortens the contact time between the blade and the material during cutting to less than 0.02s, reducing heat accumulation. The 50-80Hz cutting frequency matches the elastic modulus of the foam (0.8-1.2MPa), preventing foam resonance deformation due to excessively high frequency or rough cutting surface due to excessively low frequency.

[0030] The above-mentioned method for processing ultra-thick conductive foam rolls utilizes a 200-300G release film to support and splice together strips of ultra-thick conductive foam (thickness ≥18mm). This is combined with protective film coverage and atomized release agent spraying, along with vibratory cutting using a steel blade. This multi-dimensional approach, addressing load-bearing support, surface protection, and cutting adaptability, effectively solves the S-shaped deformation problem caused by insufficient bottom support during ultra-thick conductive foam cutting. Simultaneously, the release agent's isolation and lubrication reduce lint residue, significantly improving product dimensional consistency and surface cleanliness, fundamentally improving product quality and meeting the core requirements of precision and quality in automated assembly. In a preferred embodiment, the protective film thickness is 0.05mm. Its main components are: substrate: PET (polyester), PE (polyethylene). Its main function is physical protection, preventing the conductive foam surface from being contaminated with release agent ink, while also preventing adhesive sticking during cutting, thus improving efficiency and quality. Before cutting, a protective film is applied to the material surface, and a release agent is sprayed onto the protective film before processing and cutting, preventing lint and blade overheating. Before cutting, a protective film is applied to the material surface. A release agent is then sprayed onto the protective film before cutting, preventing lint buildup and blade overheating. Custom-made special steel blades are used, with a 21-degree blade angle, 0.3mm thickness, a length of 30mm, and a width of 6mm. Using this method, production efficiency is 30 times higher than traditional methods, and the yield rate is increased to 99%, a 20% improvement over previous methods. This overcomes the current limitations of existing technologies in processing ultra-thick conductive foam, which suffers from deformation, wrinkles, low yield, and low efficiency. This technology can also be extended to similar ultra-thick machine-applied roll products. It solves the problem of severe edge deformation in existing technologies when processing small-sized ultra-thick conductive foam, failing to meet the requirements of automated machine-applied rolls. The products produced by this invention have stable dimensions, and the automatic application process using CCD equipment can produce rolls that meet the precision requirements of automated machine application.

[0031] In one embodiment, after the cutting operation, the processing method further includes the following steps: Finished Product Processing: CCD equipment automatically aligns and attaches the pre-cut, pre-sized, ultra-thick conductive foam rolls to form machine-applied rolls that meet automated application requirements. This addition of an automated CCD alignment step ensures precise positioning and orderly arrangement of the cut products, resulting in machine-applied rolls that meet automated application requirements. This not only improves the product's adaptability to subsequent applications but also reduces secondary damage caused by manual intervention, ensuring product quality stability and consistency.

[0032] In one embodiment, the product tolerance of the machine-mounted roll material is ≤ ±0.5mm, and the yield is ≥ 99%. Thus, the processing method of this application ensures improved quality, guarantees product dimensional fluctuations are controlled within ±0.5mm, and achieves a yield of over 99%, fully meeting the stringent requirements of the electronics industry's automated mounting for high-precision, high-reliability products, and enhancing the product's market competitiveness. Please refer to... Figure 4 and Figure 5 This application provides a method for processing ultra-thick conductive foam rolls, resulting in neat edges and solving the S-shaped edge problem of traditional products. It also addresses the issues of deformation, wrinkling, low yield, and low efficiency associated with current technologies that cannot process ultra-thick conductive foam. This technology can also be extended to similar ultra-thick machine-applied roll products. This application improves product edge deformation, resulting in good product consistency and a tolerance accuracy of less than ±0.5mm.

[0033] Existing technologies suffer from severe edge deformation when processing small-sized, ultra-thick conductive foam, failing to meet the requirements of automated roll bonding. The products produced by this invention have stable dimensions, and the automatic bonding process using CCD equipment enables the production of rolls that meet the precision requirements of automated bonding.

[0034] This application also provides an ultra-thick conductive wrapped foam machine-applied roll material, characterized in that it is prepared by the processing method described in any of the above embodiments.

[0035] Applications of the ultra-thick conductive foam machine-applied roll material as described in any of the above embodiments in electromagnetic shielding or buffer components of electronic devices and communication terminals. The ultra-thick conductive foam machine-applied roll material prepared in this application, with its advantages of high precision (tolerance ≤ ±0.5mm), low residue, and high shielding effectiveness (48-52dB), is particularly suitable for the following high-end application scenarios: 5G base station RF module: The ultra-thick structure provides a buffer gap of 3-5mm to meet the high power heat dissipation requirements of the module, and the electromagnetic shielding performance meets the anti-interference requirements of 5G signal transmission. Battery Management System (BMS) for New Energy Vehicles: The flame-retardant properties of the foam (UL94 V0 certified) and its high-precision dimensions allow it to fit into the compact installation space of the battery pack and prevent poor contact caused by vibration. Industrial-grade drone flight control module: The low lint residue design avoids the risk of lint short circuits, and the ultra-thick structure can absorb high-frequency vibrations during flight, improving the stability of the flight control system; High-end server chassis: Automated mounting pass rate >98%, which can meet the mass production requirements of servers, and electromagnetic shielding performance effectively reduces signal interference of internal components.

[0036] In these application scenarios, existing technology products cannot be stably adapted due to insufficient accuracy and reliability. However, the solution proposed in this application fills the gap in the application of ultra-thick conductive foam in high-end electronic devices through creative technical design.

[0037] The above-mentioned method for processing ultra-thick conductive foam rolls utilizes a 200-300G release film to support and splice together strips of ultra-thick conductive foam (thickness ≥18mm). This is combined with protective film coverage and atomized release agent spraying, along with vibratory cutting using a steel blade. This multi-dimensional approach, addressing load-bearing support, surface protection, and cutting adaptability, effectively solves the S-shaped deformation problem caused by insufficient bottom support during ultra-thick conductive foam cutting. Simultaneously, the release agent's isolation and lubrication reduce lint residue, significantly improving product dimensional consistency and surface cleanliness, fundamentally improving product quality and meeting the core requirements of precision and quality in automated assembly. In a preferred embodiment, the protective film thickness is 0.05mm. Its main components are: substrate: PET (polyester), PE (polyethylene). Its main function is physical protection, preventing the conductive foam surface from being contaminated with release agent ink, while also preventing adhesive sticking during cutting, thus improving efficiency and quality. Before cutting, a protective film is applied to the material surface, and a release agent is sprayed onto the protective film before processing and cutting, preventing lint and blade overheating. Before cutting, a protective film is applied to the material surface. A release agent is then sprayed onto the protective film before cutting, preventing lint buildup and blade overheating. Custom-made special steel blades are used, with a 21-degree blade angle, 0.3mm thickness, a length of 30mm, and a width of 6mm. Using this method, production efficiency is 30 times higher than traditional methods, and the yield rate is increased to 99%, a 20% improvement over previous methods. This overcomes the current limitations of existing technologies in processing ultra-thick conductive foam, which suffers from deformation, wrinkles, low yield, and low efficiency. This technology can also be extended to similar ultra-thick machine-applied roll products. It solves the problem of severe edge deformation in existing technologies when processing small-sized ultra-thick conductive foam, failing to meet the requirements of automated machine-applied rolls. The products produced by this invention have stable dimensions, and the automatic application process using CCD equipment can produce rolls that meet the precision requirements of automated machine application.

[0038] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. It should be noted that the terms "in one embodiment," "for example," and "again," etc., in this application are intended to illustrate the application and not to limit it. The embodiments described above only illustrate several implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for processing ultra-thick conductive wrapped foam rolls, characterized in that, Includes the following steps: Substrate pretreatment: Select a 200-300G release film as the carrier substrate, and splice and fix strip-shaped ultra-thick conductive foam at a preset interval on the release film to form a whole plate of material to be processed; wherein, the thickness of the ultra-thick conductive foam is ≥18mm; Cutting pretreatment: Cover the surface of the whole plate of material to be processed with a protective film, the substrate of the protective film being PET or PE; spray a release agent onto the surface of the protective film by atomization; Cutting operation: The whole plate of material to be processed is vibrated and cut using a steel blade to prepare ultra-thick conductive foam of a preset size after cutting.

2. The processing method according to claim 1, characterized in that, The thickness of the protective film is 0.05 mm.

3. The processing method according to claim 1 or 2, characterized in that, The release agent is sprayed at a distance of 20-30cm, and the amount of release agent used per square meter of protective film is controlled at 0.2-0.3mL. The main component of the release agent is polysiloxane.

4. The processing method according to claim 3, characterized in that, The blade of the steel blade has a blade angle of 21°, a thickness of 0.3mm, a length of 30mm, and a width of 6mm.

5. The processing method according to claim 4, characterized in that, The amplitude of the vibration cutting is controlled at 0.1-0.3 mm, and the cutting frequency is 50-80 Hz.

6. The processing method according to claim 5, characterized in that, The strip-shaped ultra-thick conductive foam consists of a foam core and an outer layer of conductive fabric.

7. The processing method according to claim 6, characterized in that, After the cutting operation, the processing method further includes the following steps: Finished product processing: The ultra-thick conductive foam of the pre-cut size is automatically aligned and pasted by CCD equipment to form machine-applied rolls that meet the requirements of automated application.

8. The processing method according to claim 7, characterized in that, The product tolerance of the machine-applied roll material is ≤ ±0.5mm, and the yield is ≥ 99%.

9. A type of ultra-thick conductive wrapped foam machine-applied roll material, characterized in that, It is prepared by any of the processing methods described in claims 1-8.

10. The application of the ultra-thick conductive foam machine-applied roll material as described in claim 9 in electromagnetic shielding or buffer components of electronic devices and communication terminals.

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