Bionic corrugated composite layer graphite flake elastic structure and preparation process thereof

Abstract

The invention provides a bionic corrugated composite layer graphite flake elastic structure and a preparation process thereof, and relates to the technical field of heat conduction graphite flakes of electric devices, the bionic corrugated composite layer graphite flake elastic structure comprises a wave-shaped graphite flake, and the outer side of the wave-shaped graphite flake is wrapped with a TPU layer; and the wave-shaped graphite flake is connected with the TPU layer through a double faced adhesive tape. According to the invention, the two sides of the wave-shaped graphite flake are wrapped by the TPU layers, so that the product has a tensile effect, the wave-shaped graphite flake is arranged between the two TPU layers, and the composite material formed by the wave-shaped graphite flake and the TPU layers realizes excellent tensile property. Due to high elasticity and flexibility of the TPU layer, the TPU layer can absorb and disperse stress during stretching, and the wavy graphite flake provides necessary structural support and rigidity; through the design, the composite material is tough and durable. The advantages of being stretchable and bendable are combined, the heat conduction performance is improved, and the life cycle of the product is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of heat-conducting graphite sheets for electrical components, and particularly to a bionic corrugated composite layer graphite sheet elastic structure and a preparation process thereof. Background Art

[0002] Due to its good heat conduction performance and unique grain orientation, the heat-conducting graphite sheet can conduct heat in two directions. Its sheet-like structure can be well adapted to any surface. While shielding heat sources and components, it improves the performance of electronic products, enabling the products to dissipate heat evenly and providing thermal insulation in terms of thickness. It is widely used in heat conduction and heat dissipation of electronic products, such as laptop computers, high-power LED lighting, flat panel displays, digital video cameras, mobile terminals, etc.

[0003] In the prior art: 1. In the current application of elastic graphite, the main process is to perform a hollowing treatment on the foldable area so that the graphite sheet has a stretching function. 2. In the current application of foldable graphite, materials with a high elongation rate are generally used to wrap the graphite, and the two-side materials are used to provide protection for the product.

[0004] Disadvantages of the prior art: 1. Since the hollowing treatment is performed on the bending area, to a certain extent, it will cause a reduction in the heat conduction ability of the graphite, and further affect and reduce its heat dissipation performance; 2. This protection method cannot be stretched during the folding process, easily causing the graphite product to quickly wrinkle, and then leading to the fracture of the graphite sheet, resulting in the loss of the heat conduction function in the bending area. Summary of the Invention

[0005] The present invention provides a bionic corrugated composite layer graphite sheet elastic structure and a preparation process thereof to solve at least one of the technical problems raised in the above background art.

[0006] To solve the above technical problems, the present invention discloses a bionic corrugated composite layer graphite sheet elastic structure, including: a wavy graphite sheet, and a TPU layer wrapped outside the wavy graphite sheet.

[0007] Preferably, the constituent materials of the wavy graphite sheet are in sequence: a first insulating film single-sided adhesive, wavy flexible graphite, PSA adhesive, and a second insulating film single-sided adhesive.

[0008] Preferably, the moment of inertia of the longitudinal section in the width direction of the wavy graphite sheet is: ; ; is the moment of inertia of a rectangular cross-section with a width of b and a thickness of h; K is the magnification factor of the cross-sectional geometric shape of the wavy graphite sheet, where K is greater than 1; The maximum distance from the points on the longitudinal section in the width direction of the wavy graphite sheet to the neutral axis ; h is also the overall thickness of the wavy graphite sheet; The maximum bending stress of the wavy graphite sheet under the bending moment M ; is the maximum bending stress of a rectangular cross-section with width b and thickness h under the bending moment M; M is the bending moment.

[0009] The present invention also discloses a preparation process of a bionic corrugated composite layer graphite sheet elastic structure, which is applied to prepare the bionic corrugated composite layer graphite sheet elastic structure. The preparation process of the bionic corrugated composite layer graphite sheet elastic structure includes the following steps carried out in sequence: Step S1: Glue the upper and lower cover layers of the wavy flexible graphite to obtain an initial graphite product: Step S2: Thermally press the initial graphite product through a hot press to obtain a thermally pressed graphite product; Step S3: Bond the non-glue water surface of the TPU glue to two layers of silica gel protective films to obtain a TPU layer, and assemble the TPU layer onto the thermally pressed graphite product through alignment and positioning to obtain a bionic corrugated composite layer graphite sheet elastic structure.

[0010] Preferably, step S1 includes: Step S11: Bond the wavy flexible graphite, the first sticky silica gel protective film, and the second sticky silica gel protective film from top to bottom in sequence through a laminator to obtain a first laminated material; Step S12: The first laminated material obtained in step S11 passes through a die-cutting machine, and two tapes are pasted on the graphite edge for waste discharge by the machine; use the first die cutter to punch the graphite surface, and cut the first laminated material into multiple regions of a second shape. The outer frame of the region of the second shape is semi-cut from the first sticky silica gel protective film, and the positioning holes of the region of the second shape are fully cut; Step S13: Bond the upper end of the graphite of the first laminated material obtained in step S12 to the PSA glue with the self-adhesive release film one removed through a laminator, and bond the self-adhesive release film two of the PSA glue with the release surface of the first release film. Tear off the first sticky silica gel protective film and the second sticky silica gel protective film on the laminator, and bond the single-sided adhesive of the first insulating film to the lower end of the graphite of the first laminated material; After bonding the lower end of the anti-static protective film to the pad die release film, the anti-static protective film is then bonded to the single-sided adhesive of the first insulating film to form a graphite tape; After the graphite strip is flipped, it is die-cut towards the pad knife release film, half-cut to the pad knife release film, then the pad knife release film is peeled off, and then the first single-layer silicone protective film is laminated on the anti-static protective film, and then wound up to obtain a graphite semi-finished product; Step S14: The second release film, the second insulating film single-sided adhesive, the second single-layer silicone protective film, and the third sticky silicone protective film are laminated in sequence by a laminating machine to obtain a second laminated material. A plurality of regions of the first shape are punched out on the release surface of the second laminated material using a second die cutter. The outer frame of the region of the first shape is half-cut to the second single-layer silicone protective film. The second insulating film single-sided adhesive and the positioning holes must not be missing in the region of the first shape; the waste of the second release film is discharged, and then wound up to obtain a second laminated material semi-finished product; Step S15: Manually assemble the graphite semi-finished product and the second laminated material semi-finished product using a fixture: remove the second single-layer silicone protective film and the third sticky silicone protective film of the second laminated material semi-finished product, and remove the first release film of the graphite semi-finished product, and laminate the second insulating film single-sided adhesive of the second laminated material semi-finished product with the PSA adhesive of the graphite semi-finished product to obtain a first assembled semi-finished product; Step S16: Feed the first assembled semi-finished product into the laminating machine, then discharge the second release film, stick a third release film on the second insulating film single-sided adhesive of the first assembled semi-finished product, die-cut towards the first single-layer silicone protective film, the tear position is half-cut to the anti-static protective film, and the product shape is half-cut to the first single-layer silicone protective film, and the first single-layer silicone protective film is discharged to obtain an initial graphite product.

[0011] Preferably, the hot pressing temperature is 80°C to 100°C, the hot pressing time is 10 to 15 s, and the hot pressing pressure is 80 - 100 N.

[0012] Preferably, before performing the batch step S2 on the current batch of initial graphite products using the current hot press, perform a step S20 once: determine the target hot pressing control parameters for performing the batch step S2 on the current batch of initial graphite products through testing; During the process of performing the batch step S2 on the current batch of initial graphite products using the current hot press, hot pressing is controlled based on the target hot pressing control parameters obtained in the corresponding step S20.

[0013] Preferably, step S20 includes: Step S201: Obtain the information of each layer of materials in the upper structure and the information of each layer of materials in the lower structure of the corrugated flexible graphite in a single current batch of initial graphite products. The information of the materials includes: the thickness of the materials and the specific heat capacity of the materials; Step S202: Obtain the required hot pressing time range, required hot pressing temperature range, and required preheating temperature range of a single current batch of initial graphite products; Step S203: Obtain the thermal efficiency of the device for heating the upper structure of the corrugated flexible graphite and the thermal efficiency of the device for heating the lower structure of the corrugated flexible graphite of the current hot press, which were newly determined before the execution of the current Step S20. Step S204: Calculate the first target working power corresponding to the current batch of initial graphite products for the device of the current hot press that heats the lower structure of the corrugated flexible graphite based on Steps S201 - S203. Step S205: Control the device of the current hot press that heats the lower structure of the corrugated flexible graphite with the first target working power obtained in Step S204 and control the second temperature measurement module to work in real time. Preheat the current batch of initial graphite product samples until the detected value of the second temperature measurement module is the minimum value of the required preheating temperature range of the current batch of initial graphite products. At this time, control the first temperature measurement module and the second temperature measurement module to perform synchronous temperature measurement H times until the detected value of either the first temperature measurement module or the second temperature measurement module is equal to the maximum value of the required preheating temperature range of the current batch of initial graphite products. Also, time the working duration of the second temperature measurement module and calculate the absolute value of the difference between the detected values of the first temperature measurement module and the second temperature measurement module for each synchronous temperature measurement. The second temperature measurement module is used to detect the surface temperature of the lower structure of the corrugated flexible graphite of the initial graphite product sample, and the first temperature measurement module is used to detect the surface temperature of the upper structure of the corrugated flexible graphite of the initial graphite product sample. Determine the detected value of the first temperature measurement module for the target synchronous temperature measurement as the target preheating temperature of the upper structure of the current batch of initial graphite products, and determine the detected value of the second temperature measurement module for the target synchronous temperature measurement as the target preheating temperature of the lower structure of the current batch of initial graphite products. Among the H times of synchronous temperature measurement, the absolute value of the difference between the detected values of the first temperature measurement module and the second temperature measurement module for the target synchronous temperature measurement is the smallest. Step S206: Calculate the target preheating duration of the current batch of initial graphite products, the target hot pressing duration for the current batch of initial graphite products to be hot pressed by the current hot press, and the second target working power corresponding to the current batch of initial graphite products for the device of the current hot press that heats the upper structure of the corrugated flexible graphite based on Steps S201 - S205.

[0014] Preferably, during the working process of the hot press, periodically obtain the thermal efficiency of the device of the current hot press that heats the upper structure of the corrugated flexible graphite and the thermal efficiency of the device of the current hot press that heats the lower structure of the corrugated flexible graphite based on tests. Before the hot press hot presses each batch of initial graphite products, also determine the target quantity of each batch of initial graphite products. The process of determining the target quantity of the current batch of initial graphite products includes: Step S2001: Obtain, for the entire hot pressing process of a single current batch of initial graphite products: the total heat demand range for the upper structure of the corrugated flexible graphite, the total heat demand range for the lower structure of the corrugated flexible graphite, the average working power and total working time of the device of the current hot press for heating the upper structure of the corrugated flexible graphite, and the average working power and total working time of the device of the current hot press for heating the lower structure of the corrugated flexible graphite; Step S2002: Based on the thermal efficiencies of the device of the current hot press for heating the upper structure of the corrugated flexible graphite and the device of the current hot press for heating the lower structure of the corrugated flexible graphite obtained in several latest times, construct a time-thermal efficiency change curve of the device of the current hot press for heating the upper structure of the corrugated flexible graphite and a time-thermal efficiency change curve of the device of the current hot press for heating the lower structure of the corrugated flexible graphite; Step S2003: Calculate the target quantity of the current batch of initial graphite products based on Step S2001 and Step S2002 。

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The corrugated graphite sheet is located in the middle, mainly providing structural support and possibly heat conduction function. Since the graphite sheet itself is hard and brittle, its addition can enhance the overall rigidity of the composite material. The TPU material is wrapped on both sides of the corrugated graphite sheet, and the TPU material uses its high elasticity and flexibility to absorb stress and strain. When an external force acts on the composite material (formed by the composite of the corrugated graphite sheet and the TPU layer), the TPU layer will first deform and absorb most of the stress, thus protecting the internal corrugated graphite sheet from damage.

[0017] 2. The two sides of the corrugated graphite sheet are wrapped with TPU layers, making the product (formed by the composite of the corrugated graphite sheet and the TPU layer) have a stretching effect. The corrugated graphite sheet is placed between two TPU layers, and the composite material composed of the corrugated graphite sheet and the TPU layer achieves excellent tensile properties. The high elasticity and flexibility of the TPU layer enable it to absorb and disperse stress during stretching, while the corrugated graphite sheet provides the necessary structural support and rigidity; this design makes the composite material both tough and durable.

[0018] 3. Combining the advantages of stretchability and bendability, it not only improves the heat conduction performance but also extends the product life cycle; 4. Reduces the time of wrinkle generation and the occurrence of fracture, and extends the service life of the product; 5. Achieves batch production stability. Brief Description of the Drawings

[0019] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings: Figure 1 is a schematic structural diagram of the present invention; Figure 2 is the heating source and T during the processes of Test 1 and Test 2 of the present invention C、 T 1、 T 2 position; Figure 3 is the temperature curve diagram corresponding to Test 1 of the present invention; Figure 4 is the temperature comparison diagram corresponding to Test 1 of the present invention; Figure 5 is the temperature curve diagram corresponding to Test 2 of the present invention; Figure 6 is the temperature comparison diagram corresponding to Test 2 of the present invention. Detailed Embodiments

[0020] The following describes the preferred embodiments of the present invention with reference to the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0021] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and do not particularly refer to the meaning of order or sequence. Nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The present invention provides the following embodiments Embodiment 1. The embodiment of the present invention provides a bionic corrugated composite layer graphite sheet elastic structure, as Figure 1 shown, including: a wavy graphite sheet 2, and a TPU layer 1 is wrapped outside the wavy graphite sheet 2.

[0023] The wavy graphite sheet 2 and the TPU layer 1 are connected by double-sided tape. The wavy graphite sheet 2 adopts a bionic corrugated structure; 1. (1) Bending resistance principle of the present invention: ① The moment of inertia of the longitudinal section in the width direction of the wavy graphite sheet 2 is: ; ; is the moment of inertia of a rectangular cross-section with width b and thickness h; the position of the maximum stress of a rectangular cross-section with width b and thickness h: ; K is the magnification coefficient of the cross-sectional geometric shape of the wavy graphite sheet 2, where K is greater than 1 (the specific value of K is determined by the corrugation shape); The maximum distance from the points on the longitudinal section in the width direction of the wavy graphite sheet 2 to the neutral axis ; h is also the overall thickness of the wavy graphite sheet 2; The maximum bending stress of the wavy graphite sheet 2 under the bending moment M ; is the maximum bending stress of a rectangular cross-section with width b and thickness h under the bending moment M; M is the bending moment.

[0024] For cyclic bending, the smaller the stress amplitude, the longer the fatigue life; ② Under the same bending angle θ, the relationship between the curvature radius R and the structural length L is The strain formula is: ; is the bending strain; since , therefore, the strain of the bionic corrugated structure is smaller, further reducing fatigue damage.

[0025] The bionic corrugated structure reduces the maximum stress and strain through geometric optimization, thus having a longer fatigue life in cyclic bending. Therefore, the bending ability of the bionic corrugated structure is better than that of the planar structure, showing higher durability in 0 - 180° cyclic bending.

[0026] (2) Thermal conductivity principle: Conventional graphite sheet hollow structure: Assuming the porosity is ϕ, the intrinsic thermal conductivity of the graphite sheet is , the thermal conductivity of air is , the through holes are perpendicular to the X / Y plane, the heat flow path is blocked, and the equivalent thermal conductivity can be approximated by the parallel model:

[0027] The more pores, the smaller the equivalent thermal conductivity. The thermal conductivity effect of the conventional graphite sheet hollow structure is worse than that of the bionic corrugated structure.

[0028] Summary: Compared with the conventional 2D planar structured graphite sheet, the bionic corrugated composite layer graphite sheet of the present invention has stronger tensile and bending resistance. Compared with the conventional graphite sheet with a hollow structure, the bionic corrugated composite layer graphite sheet has better heat conduction ability.

[0029] Test 1: Temperature rise comparison between bionic corrugation and conventional graphite sheet after bending: Test conditions: 1. Ambient temperature: 25 °C; 2. Power of the heating source: 3.5 W; 3. Test duration: 30 minutes; The heating source corresponding to the test, T C、 T 1、 T 2 The position of is as Figure 2 shown; As Figures 3 - 4 shown, it can be concluded that: 1. The temperature difference between before and after bending of the conventional graphite sheet is 7.892 °C, and the bending loss reaches (82.381 - 74.489) / 74.489 = 9.58%. The temperature difference between before and after bending of the bionic corrugated graphite sheet is 4.103 °C, and the bending loss is only (80.227 - 76.124) / 76.124 = 5.11%, indicating that the bionic corrugated graphite sheet has lower loss and better bending resistance; C The comparison shows a difference of 7.892 °C between before and after bending of the conventional graphite sheet, and the bending loss reaches (82.381 - 74.489) / 74.489 = 9.58%. The comparison between before and after bending of the bionic corrugated graphite sheet shows a difference of 4.103 °C, and the bending loss is only (80.227 - 76.124) / 76.124 = 5.11%, indicating that the bionic corrugated graphite sheet has lower loss and better bending resistance; C The comparison shows a difference of 4.103 °C between before and after bending of the bionic corrugated graphite sheet, and the bending loss is only (80.227 - 76.124) / 76.124 = 5.11%, indicating that the bionic corrugated graphite sheet has lower loss and better bending resistance; Test 2: Temperature rise comparison between bionic corrugation and stretchable hole graphite: Test conditions: 1. Ambient temperature: 25 °C; 2. Power: 3.5 W; 3. Test duration: 30 minutes; The heating source corresponding to the test, T C、 T 1、 T 2 The position of is as Figure 2 shown; As Figures 5 - 6 shown, it can be concluded that: 1. The heat source temperature T of the bionic corrugated graphite sheet is 2.956 °C lower than that of the stretchable hole graphite sheet, indicating that it can more efficiently conduct the heat of the heat source and reduce the risk of local high temperature. C The heat source temperature T of the bionic corrugated graphite sheet is 2.956 °C lower than that of the stretchable hole graphite sheet, indicating that it can more efficiently conduct the heat of the heat source and reduce the risk of local high temperature.

[0030] 2. The temperature at the detection point T of the bionic corrugated graphite sheet increases by 8.882 °C, proving that its heat transfer efficiency is significantly better than that of the stretchable hole graphite sheet; 2 The temperature at the detection point T of the bionic corrugated graphite sheet increases by 8.882 °C, proving that its heat transfer efficiency is significantly better than that of the stretchable hole graphite sheet; The corrugated deformation provides a directional heat conduction path, reducing the lateral thermal resistance; The pore-free continuous structure avoids heat flow interruption (compared with the heat scattering loss of porous graphite flakes) The beneficial effects of the above technical solutions are as follows: 1. The wavy graphite flake 2 is located in the middle, mainly providing structural support and possibly heat conduction function. Since the graphite flake itself is hard and brittle, its addition can enhance the overall rigidity of the composite material. The TPU material is wrapped on both sides of the wavy graphite flake 2. The TPU material utilizes its high elasticity and flexibility to absorb stress and strain. When an external force acts on the composite material (formed by the composite of the wavy graphite flake 2 and the TPU layer 1), the TPU layer 1 will deform first and absorb most of the stress, thus protecting the internal wavy graphite flake 2 from damage.

[0031] 2. The two sides of the wavy graphite flake 2 are wrapped with the TPU layer 1, making the product (formed by the composite of the wavy graphite flake 2 and the TPU layer 1) have a stretching effect. The wavy graphite flake 2 is placed between two TPU layers 1, and the composite material composed of the wavy graphite flake 2 and the TPU layer 1 achieves excellent tensile properties. The high elasticity and flexibility of the TPU layer 1 enable it to absorb and disperse stress during stretching, while the wavy graphite flake 2 provides the necessary structural support and rigidity; this design makes the composite material both tough and durable.

[0032] 3. Combining the advantages of both stretchability and bendability, it not only improves the heat conduction performance but also extends the product life cycle; 4. Reducing the time of wrinkle generation and the occurrence of fractures, extending the service life of the product; 5. Achieving batch production stability.

[0033] Example 2, based on Example 1, the present invention also discloses a preparation process of a bionic corrugated composite layer graphite flake elastic structure, which is applied to prepare the bionic corrugated composite layer graphite flake elastic structure. The preparation process of the bionic corrugated composite layer graphite flake elastic structure includes the following steps carried out in sequence: Including the following steps carried out in sequence: Step S1: Coating the upper and lower layers of the wavy flexible graphite to obtain an initial graphite product: Step S2: Thermally pressing the initial graphite product through a hot press to obtain a thermally pressed graphite product Step S3: Bond the non-adhesive surface of the TPU glue to two layers of silicone protective film to obtain TPU layer 1, and assemble TPU layer 1 onto the hot-pressed graphite product through alignment and positioning to obtain the bionic corrugated composite layer graphite sheet elastic structure. In the process of the present invention, a white PP release film, TPU glue, a blue single-layer silicone protective film with a viscosity of 1.5 g, and a silicone protective film with a viscosity of 2 g are sequentially bonded and then wound to form a third coated material roll for the following assembly process; The hot-pressing temperature is 80°C to 100°C, the hot-pressing time is 10 to 15 s, and the hot-pressing pressure is 80 - 100 N; The beneficial effects of the above technical solution are: laminating the upper and lower layers of the wavy flexible graphite to protect the surface of the graphite sheet and improve the insulation performance.

[0034] Example 3, on the basis of Example 2, the constituent materials of the wavy graphite sheet 2 are, in sequence: a first insulating film single-sided adhesive (which can be a black shiny insulating film single-sided adhesive), wavy flexible graphite, PSA adhesive, and a second insulating film single-sided adhesive (which can be a black shiny insulating film single-sided adhesive; the second insulating film single-sided adhesive can be the same as the first insulating film single-sided adhesive); the upper and lower structures of the wavy flexible graphite of the present invention can also be composed of other materials.

[0035] Step S1 includes: Step S11: Bond the wavy flexible graphite, a first sticky silicone protective film (a silicone protective film with a viscosity of 2 g), and a second sticky silicone protective film (a silicone protective film with a viscosity of 3 - 4.5 g) from top to bottom in sequence through a laminator to obtain a first coated material; Step S12: The first coated material obtained in Step S11 passes through a die-cutting machine, and two 8-mm transparent tapes are pasted on the graphite edge (pay attention not to cover the holes) for machine waste discharge (discharging the outer frame waste of the second-shaped area of the first coated material); use a first die cutter to punch and cut the graphite surface, cut the first coated material into multiple second-shaped areas, the outer frame of the second-shaped area is semi-cut with the first sticky silicone protective film (the first sticky silicone protective film is cut), the positioning holes of the second-shaped area are fully cut (i.e., completely cut at the positioning holes), and the first coated material tape is split (‌The splitting of the die-cut tape‌ means that in the die-cutting process, the tape (usually a roll-shaped material) is cut through a die cutter to divide it into multiple independent components or products. This process usually involves using specialized die-cutting equipment, such as a round die-cutting machine, to cut the tape according to a preset pattern or shape on the tape‌), and the machine discharges the excess waste; Step S13: Use a laminator to bond the upper end of the graphite in the first overlay obtained in Step S12 to the PSA adhesive from which the self-adhesive release film one (automatic thin release film) has been removed. The self-adhesive release film two (self-adhesive thick release film) of the PSA adhesive is bonded to the release surface of the first release film (75μm ultra-light transparent release film) (the material should be covered flat without wrinkles). On the laminator, remove the first sticky silicone protective film and the second sticky silicone protective film, and bond the first insulating film single-sided adhesive (which can be a 30μm black shiny insulating film single-sided adhesive, and the material can be PET) to the lower end of the graphite in the first overlay. Note that the tension of the first insulating film single-sided adhesive should be controlled to the minimum without stretching, wrinkling, or forming bubbles; PSA adhesive is also known as pressure-sensitive adhesive; After bonding the lower end of the anti-static protective film (anti-static blue single-layer dot protective film with a viscosity of 2.0g) to the die-cutting release film (75μm die-cutting release film with a viscosity of 300g), the anti-static protective film is then bonded to the first insulating film single-sided adhesive to form a graphite tape (at the same time, use two 8mm green tapes to stick to the edge of the anti-static protective film); After the graphite tape is flipped, it is die-cut towards the die-cutting release film, half-cut to the die-cutting release film, then the die-cutting release film is removed, and then a first single-layer silicone protective film (single-layer silicone protective film with a viscosity of 2g) is bonded to the first insulating film single-sided adhesive. Then, the die-cutting release film (75μm die-cutting release film with a viscosity of 300g) is removed towards one side (note that the tape should not have problems such as wrinkles and deformation), and then it is wound up to obtain a graphite semi-finished product; Step S14: Use a laminator to bond the second release film (white PP release film), the second insulating film single-sided adhesive (which can be a 30μm black shiny insulating film single-sided adhesive), the second single-layer silicone protective film (blue single-layer silicone protective film with a viscosity of 1.5g), and the third sticky silicone protective film (silicone protective film with a viscosity of 2g) in sequence to obtain a second overlay. Use a second die to punch out multiple regions of the first shape on the release surface of the second overlay (1 PCS / cut for alignment cutting). The outer frame of the region of the first shape is semi-cut to the second single-layer silicone protective film, and the second insulating film single-sided adhesive and the positioning holes should not be missing in the region of the first shape; Remove the waste of the second release film, and then wind it up to obtain a second overlay semi-finished product; Step S15: Manually use a fixture to perform the first assembly of the graphite semi-finished product and the second overlay semi-finished product: Remove the second single-layer silicone protective film and the third sticky silicone protective film of the second overlay semi-finished product, and remove the first release film of the graphite semi-finished product. Bond the second insulating film single-sided adhesive of the second overlay semi-finished product to the PSA adhesive of the graphite semi-finished product to obtain a first assembly semi-finished product; Step S16: Place the first assembled semi-finished product on the laminating machine, then remove the second release film, stick a third release film (which can be a white PP release film) on the single-sided adhesive of the second insulating film of the first assembled semi-finished product, die-cut towards the first single-layer silicone protective film, semi-cut the tear position to the anti-static protective film, semi-cut the product shape to the first single-layer silicone protective film, remove the first single-layer silicone protective film, and wind it up with a large roll core to obtain the initial graphite product; Note that the position of the single-sided adhesive of the insulating film should be accurately laminated, and there should be no defects such as wrinkles, bubbles, impurities, dirt, etc.; During the production process, keep the surfaces of materials, semi-finished products and products clean, without foreign objects, waste materials, etc.; regularly clean the waste materials and sundries around the production equipment and molds; Among them, the first shape and the second shape can be the same, and can be specifically set according to actual needs, and can be square; The above-mentioned step S3: Bond the non-adhesive surface of the TPU glue to the 2-layer silicone protective film to obtain the TPU layer 1, and assemble the TPU layer 1 onto the hot-pressed graphite product through alignment and positioning to obtain the bionic corrugated composite layer graphite sheet elastic structure; among them, in the process of the present invention, the white PP release film, TPU glue, blue single-layer silicone protective film with a viscosity of 1.5 g, and silicone protective film with a viscosity of 2 g are sequentially bonded and wound up to form a third overlying material roll (the third overlying material roll without the white PP release film is the TPU layer 1) for the following assembly process: In step S3, the third release film of the initial graphite product can be torn off, and then the single-sided adhesive of the second insulating film after tearing off the third release film is bonded to the TPU glue of a TPU layer with a white PP release film; then, after tearing off the anti-static protective film of the initial graphite product, tear off the other TPU layer bonded to the single-sided adhesive of the first insulating film of the anti-static protective film; The beneficial effects of the above technical solutions are: By setting the above various protective films in the preparation process, the production quality is guaranteed.

[0036] Example 4, based on Example 2 or 3, Before performing batch step S2 on the current batch of initial graphite products using the current hot press, perform a step S20: Determine the target hot press control parameters for performing batch step S2 on the current batch of initial graphite products through testing; Step S20 includes: Step S201: Obtain the information of each layer of materials in the upper structure and the information of each layer of materials in the lower structure of the wavy flexible graphite in a single current batch of initial graphite products. The information of the materials includes: the thickness of the materials and the specific heat capacity of the materials; Step S202: Obtain the required hot press time range, required hot press temperature range and required preheating temperature range for a single current batch of initial graphite products; in step S2 of each initial graphite product, it is preheated first and then hot pressed; Step S203: Obtain the thermal efficiency of the device for heating the upper structure of the corrugated flexible graphite and the thermal efficiency of the device for heating the lower structure of the corrugated flexible graphite of the current hot press, which were the most recently determined before the execution of the current Step S20. Step S204: Calculate the first target working power corresponding to the current batch of initial graphite products for the device of the current hot press that heats the lower structure of the corrugated flexible graphite based on Steps S201 - S203. Step S205: Control the device of the current hot press that heats the lower structure of the corrugated flexible graphite with the first target working power obtained in Step S204 and control the second temperature measurement module to work in real time (the start time of the device of the current hot press that heats the lower structure of the corrugated flexible graphite working with the first target working power obtained in Step S204 is the initial detection time of the second temperature measurement module), preheat the current batch of initial graphite product samples until the detection value of the second temperature measurement module reaches the minimum value of the required preheating temperature range of the current batch of initial graphite products. At this time, control the first temperature measurement module and the second temperature measurement module to perform synchronous temperature measurement H times until the detection value of either the first temperature measurement module or the second temperature measurement module is equal to the maximum value of the required preheating temperature range of the current batch of initial graphite products, and record the working duration of the second temperature measurement module, and calculate the absolute value of the difference between the detection values of the first temperature measurement module and the second temperature measurement module for each synchronous temperature measurement; the second temperature measurement module is used to detect the surface temperature of the lower structure of the corrugated flexible graphite of the initial graphite product sample, and the first temperature measurement module is used to detect the surface temperature of the upper structure of the corrugated flexible graphite of the initial graphite product sample; both the first temperature measurement module and the second temperature measurement module are detachably arranged on the lower hot pressing die body. Determine the detection value of the first temperature measurement module of the target sub - synchronous temperature measurement as the target preheating temperature of the upper structure of the current batch of initial graphite products, and determine the detection value of the second temperature measurement module of the target sub - synchronous temperature measurement as the target preheating temperature of the lower structure of the current batch of initial graphite products; among the H times of synchronous temperature measurement, the absolute value of the difference between the detection values of the first temperature measurement module and the second temperature measurement module of the target sub - synchronous temperature measurement is the smallest. Step S206: Calculate the target preheating duration of the current batch of initial graphite products, the target hot pressing duration for the current batch of initial graphite products to be hot - pressed by the current hot press, and the second target working power corresponding to the current batch of initial graphite products for the device of the current hot press that heats the upper structure of the corrugated flexible graphite based on Steps S201 - S205.

[0037] During the batch process S2 of the current batch of initial graphite products by the current hot press, heat pressing is controlled based on the target hot press control parameters obtained corresponding to step S20 (the first target working power of the device for heating the lower layer structure of the corrugated flexible graphite of the current hot press corresponding to the current batch of initial graphite products, the target preheating duration of the current batch of initial graphite products, the second target working power of the device for heating the upper layer structure of the corrugated flexible graphite of the current hot press corresponding to the current batch of initial graphite products, the target hot press duration of the current batch of initial graphite products through hot pressing by the current hot press); specifically, when using the current hot press to perform batch process S2 on the current batch of initial graphite products, the process of performing step S2 on each current batch of initial graphite products includes: Step S211: Place the current current batch of initial graphite products into the lower hot press mold, and control the device for heating the lower layer structure of the corrugated flexible graphite of the current hot press to preheat the current current batch of initial graphite products for the target preheating duration of the current batch of initial graphite products with the first target working power corresponding to the current batch of initial graphite products. The target preheating duration of the current batch of initial graphite products is the time difference between the detection moment of the target sub-synchronous temperature measurement by the second temperature measurement module in the corresponding step S205 and the initial detection moment of the second temperature measurement module. Step S212: Control the upper hot press mold and the lower hot press mold to perform hot pressing on the current batch of initial graphite products before clamping for the target hot press duration, and the target hot press duration is the median of the required hot press time range of a single current batch of initial graphite products. During the hot pressing for the target hot press duration, the device for heating the upper layer structure of the corrugated flexible graphite of the current hot press operates at the second target working power (the input power of the device for heating the upper layer structure of the corrugated flexible graphite of the current hot press) corresponding to the current batch of initial graphite products, and the device for heating the lower layer structure of the corrugated flexible graphite of the current hot press operates at the first target working power corresponding to the current batch of initial graphite products.

[0038] Step S204 calculates the first target working power of the device for heating the lower layer structure of the corrugated flexible graphite of the current hot press corresponding to the current batch of initial graphite products based on the following formula : ; is the median of the required hot press temperature range of the current batch of initial graphite products; is the minimum value of the required preheating temperature range of the current batch of initial graphite products; B is the number of layers of the lower layer structure material of the corrugated flexible graphite in the current batch of initial graphite products; is the thickness of the i-th layer in the lower layer structure of the corrugated flexible graphite in a single current batch of initial graphite products; is the specific heat capacity of the material of the i-th layer in the lower layer structure of the corrugated flexible graphite in the current batch of initial graphite products; is the mass of the material of the i-th layer in the lower layer structure of the corrugated flexible graphite in a single current batch of initial graphite products; is the thermal efficiency of the device for heating the lower layer structure of the corrugated flexible graphite determined in step S203 of the current hot press; t is the median of the required hot pressing time range of the current batch of initial graphite products; is the ratio value of the preheating power to the hot pressing power of the device for heating the lower layer structure of the corrugated flexible graphite of the current hot press (the value is greater than 0 and less than 1, and this ratio value is based on: the median of the required hot pressing temperature range - the temperature ratio (the ratio of the minimum value of the required preheating temperature range to the median of the required hot pressing temperature range, such as ) - obtained from the preheating power to hot pressing power ratio value mapping table, and can be taken as 0.67 for example); is the working power during hot pressing corresponding to the current batch of initial graphite products of the device for heating the lower layer structure of the corrugated flexible graphite of the current hot press; Step S206 calculates the target hot pressing duration of the current batch of initial graphite products hot pressed by the current hot press based on the following formula and the second target working power corresponding to the current batch of initial graphite products of the device for heating the upper layer structure of the corrugated flexible graphite of the current hot press ; ; ; A is the number of layers of the upper layer structure material of the corrugated flexible graphite in the current batch of initial graphite products; is the thickness of the i-th layer in the upper layer structure of the corrugated flexible graphite in a single current batch of initial graphite products; is the specific heat capacity of the material of the i-th layer in the upper layer structure of the corrugated flexible graphite in the current batch of initial graphite products; is the mass of the material of the i-th layer in the upper layer structure of the corrugated flexible graphite in a single current batch of initial graphite products; is the target preheating temperature of the upper layer structure of the current batch of initial graphite products determined in step S205; is the target preheating temperature of the lower layer structure of the current batch of initial graphite products determined in step S205; is the thermal efficiency of the device for heating the upper layer structure of the corrugated flexible graphite determined in the current step S203 of the current hot press; The ratio value of the preheating power to the hot pressing power of the device for heating the upper structure of the corrugated flexible graphite in the current hot press (the value is greater than 0 and less than 1, based on: the median value of the required hot pressing temperature range - the temperature ratio (the ratio of the minimum value of the required preheating temperature range to the median value of the required hot pressing temperature range, e.g., ) - obtained from the mapping table of the ratio value of the preheating power to the hot pressing power, and can take a value of 0.65, for example); The working power (hot pressing power) during hot pressing corresponding to the current batch of initial graphite products of the device for heating the upper structure of the corrugated flexible graphite in the current hot press; the above mapping table can take different values based on different heating devices and can be determined based on performance tests.

[0039] Among them, the device for heating the lower structure of the corrugated flexible graphite in the current hot press is arranged in the lower hot pressing die, and the device for heating the upper structure of the corrugated flexible graphite in the current hot press is arranged in the upper hot pressing die.

[0040] During the working process of the hot press, periodically test to determine the thermal efficiency of the device for heating the upper structure of the corrugated flexible graphite in the current hot press and obtain the thermal efficiency of the device for heating the lower structure of the corrugated flexible graphite in the hot press (which can be obtained by the following formula: , where U is the total heat absorption / total required heat of heating the lower structure of the corrugated flexible graphite to a certain temperature, is the total input electric energy of the device for heating the lower structure of the corrugated flexible graphite during the process of heating the lower structure of the corrugated flexible graphite to a certain temperature); The present invention presets a mapping table of initial graphite product number (the initial graphite products with the same initial graphite product number have exactly the same structural composition) - required preheating temperature range - required hot pressing time range - required hot pressing temperature range, and this mapping table is obtained based on experiments; the hot pressing effect of the initial graphite product corresponding to the initial graphite product number within the corresponding required preheating temperature range, required hot pressing time range, and required hot pressing temperature range meets the hot pressing requirements of the corresponding initial graphite product; The required hot pressing time range and required hot pressing temperature range take different values according to different initial graphite products; for example, the required hot pressing time range of the initial graphite product with the initial graphite product number G can be 10 - 12 s, and the required hot pressing temperature range can be 95 - 100 °C; In the present invention, the preheating temperature can be 70 - 85 °C; The hot pressing qualification rate of the present invention is over 95%; The beneficial effects of the above technical solutions are: 1. During the actual hot pressing process, it is necessary to consider the differences between the devices for heating the upper structure of the corrugated flexible graphite and the devices for heating the lower structure of the corrugated flexible graphite in different hot presses, and different hot pressing related control parameters (such as working power, preheating time, hot pressing time) need to be set; Since the devices for heating the upper structure of the corrugated flexible graphite and the devices for heating the lower structure of the corrugated flexible graphite in the hot press have reduced thermal efficiency after long-term use; therefore, before using the current hot press to perform the batch step S2 on the current batch of initial graphite products, a step S20 needs to be carried out: determining the target hot pressing control parameters for performing the batch step S2 on the current batch of initial graphite products through testing (matching the heating efficiency of the devices for heating the upper structure of the corrugated flexible graphite and the devices for heating the lower structure of the corrugated flexible graphite and the preheating temperature rise state of the current batch of initial graphite products); during the process of the current hot press performing the batch step S2 on the current batch of initial graphite products, hot pressing is controlled based on the target hot pressing control parameters obtained in the corresponding step S20; thus ensuring the batch hot pressing effect of the current batch of initial graphite products.

[0041] 2. The device for heating the lower structure of the corrugated flexible graphite is used for preheating the initial graphite products and heating during the hot pressing process of the lower structure of the corrugated flexible graphite, and the device for heating the upper structure of the corrugated flexible graphite is used for heating during the hot pressing process of the upper structure of the corrugated flexible graphite; Determine that the detection value of the temperature measurement module 1 for determining the target sub-synchronous temperature measurement is the target preheating temperature of the upper structure of the current batch of initial graphite products, and determine that the detection value of the temperature measurement module 2 for determining the target sub-synchronous temperature measurement is the target preheating temperature of the lower structure of the current batch of initial graphite products; in the H sub-synchronous temperature measurement, the absolute value of the difference between the detection values of the temperature measurement module 1 and the temperature measurement module 2 of the target sub-synchronous temperature measurement is the smallest; thus ensuring that the difference between the target preheating temperature of the upper structure of the current batch of initial graphite products and the target preheating temperature of the lower structure of the current batch of initial graphite products is as small as possible, and avoiding uneven temperature affecting the subsequent hot pressing effect; And determine a suitable first target working power based on the preheating requirements and hot pressing heating requirements of the device for heating the lower structure of the corrugated flexible graphite, avoiding a large difference between the working power during preheating and the working power during hot pressing, which affects the service life of the equipment.

[0042] Example 5, based on any one of Examples 2 - 4, during the working process of the hot press, periodically obtain the thermal efficiency of the device for heating the upper structure of the corrugated flexible graphite of the current hot press and the thermal efficiency of the device for heating the lower structure of the corrugated flexible graphite of the current hot press through testing; Before the hot press hot presses each batch of initial graphite products, it also determines the target quantity of each batch of initial graphite products; the process of determining the target quantity of the current batch of initial graphite products includes: Step S2001: Obtain, for the entire hot pressing process of a single current batch of initial graphite products, the total heat demand range for the upper structure of the corrugated flexible graphite, the total heat demand range for the lower structure of the corrugated flexible graphite, the average working power and the total working time of the device for heating the upper structure of the corrugated flexible graphite of the current hot press; Step S2002: Based on the thermal efficiencies of the device for heating the upper structure of the corrugated flexible graphite of the current hot press and the device for heating the lower structure of the corrugated flexible graphite of the current hot press obtained in the latest several times, construct a time-thermal efficiency change curve of the device for heating the upper structure of the corrugated flexible graphite of the current hot press and a time-thermal efficiency change curve of the device for heating the lower structure of the corrugated flexible graphite of the current hot press; Step S2003: Calculate the target quantity of the current batch of initial graphite products based on Step S2001 and Step S2002 。

[0043] ; is the median value of the total target heat demand range for the upper structure of the corrugated flexible graphite for the entire hot pressing process of a single current batch of initial graphite products; is the average working power of the device for heating the upper structure of the corrugated flexible graphite of the current hot press for the entire hot pressing process of a single current batch of initial graphite products; is the total working time of the device for heating the upper structure of the corrugated flexible graphite of the current hot press for the entire hot pressing process of a single current batch of initial graphite products; are respectively the initial ordinate (ordinate corresponding to the initial time), the end ordinate (ordinate corresponding to the end time), the maximum ordinate, and the minimum ordinate of the time-thermal efficiency change curve of the device for heating the upper structure of the corrugated flexible graphite of the current hot press obtained in Step S2002; is the corresponding abscissa difference of the time-thermal efficiency change curve of the device for heating the upper structure of the corrugated flexible graphite of the current hot press obtained in Step S2002; is the corresponding abscissa difference (time difference) of the time-thermal efficiency change curve of the device for heating the upper structure of the corrugated flexible graphite of the current hot press obtained in Step S2002; is the median value of the total target heat demand range for the lower structure of the corrugated flexible graphite for the entire hot pressing process of a single current batch of initial graphite products; The average working power of the device for heating the underlying structure of the corrugated flexible graphite of the current hot press machine during the entire hot pressing process of a single current batch of initial graphite products; The total working time of the device of the current hot press for heating the underlying structure of the corrugated flexible graphite during the entire hot pressing process of a single current batch of initial graphite products; They are respectively the initial ordinate, the final ordinate, the maximum ordinate, and the minimum ordinate of the thermal efficiency variation curve of the device for heating the lower structure of the wavy flexible graphite by the current hot press obtained in step S2002; The thermal efficiency variation curve of the device for heating the lower structure of the corrugated flexible graphite by the time-current hot press obtained in step S2002 The corresponding horizontal axis difference (corresponding to the time difference); The thermal efficiency variation curve of the device for heating the lower structure of the corrugated flexible graphite by the time-current hot press obtained in step S2002 The corresponding horizontal axis difference; is the minimum value; They are evaluation weight one and evaluation weight two (both values ​​are greater than 0 and less than 1, and can be 0.5 and 0.5 respectively); They are evaluation weight three and evaluation weight four (both values ​​are greater than 0 and less than 1, and can be 0.4 and 0.6 respectively); The beneficial effects of the above technical solution are: The same hot pressing control parameters (such as working power and working time) are selected for hot pressing of each batch of initial graphite products to avoid the inconvenience of repeatedly adjusting parameters during the hot pressing process of each batch of initial graphite products; However, since the heat efficiency of the device for heating the upper structure of the corrugated flexible graphite and the device for heating the lower structure of the corrugated flexible graphite of the hot press decreases with long-term use, it is necessary to avoid too many initial graphite products in a single batch, which results in the heat pressing effect of the subsequent single initial graphite products of the single batch of initial graphite products failing to meet the demand due to the above-mentioned reduction in heat efficiency; Based on the latest several acquired thermal efficiencies of the current hot press's devices for heating the upper structure of the wavy flexible graphite, the current hot press's devices for heating the lower structure of the wavy flexible graphite, and the required parameters for the entire hot pressing process of a single current batch of initial graphite products, an appropriate number of the current batch of initial graphite products are selected to ensure that the hot pressing effects of all individual initial graphite products in the current batch of initial graphite products meet the requirements.

[0044] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A bionic corrugated composite layer graphite sheet elastic structure, characterized in that: include: A wavy graphite sheet (2), wherein the outer side of the wavy graphite sheet (2) is wrapped with a TPU layer (1); The constituent materials of the wavy graphite sheet (2) are, in order: a first insulating film single-sided adhesive, wavy flexible graphite, PSA adhesive, and a second insulating film single-sided adhesive.

2. The bionic corrugated composite layer graphite sheet elastic structure according to claim 1, characterized in that: The non-glue surface of the TPU glue is laminated with two layers of silicone protective films to obtain a TPU layer (1).

3. The bionic corrugated composite layer graphite sheet elastic structure according to claim 1, characterized in that: The longitudinal cross-sectional moment of inertia of the wavy graphite sheet (2) in the width direction for: ； ; is the section moment of inertia of a rectangular cross section with width b and thickness h; K is the magnification factor of the cross-sectional geometry of the wavy graphite sheet (2), where K is greater than 1; The maximum distance from a point on the longitudinal cross section in the width direction of the wavy graphite sheet (2) to the neutral axis ; h is also the thickness of the entire wavy graphite sheet (2); Maximum bending stress of the corrugated graphite sheet (2) under bending moment M ; It is the maximum bending stress of a rectangular section with width b and thickness h under bending moment M; M is the bending moment.

4. A process for preparing a bionic corrugated composite layer graphite sheet elastic structure, which is used to prepare the bionic corrugated composite layer graphite sheet elastic structure as claimed in any one of claims 1 to 3, characterized in that: The preparation process of the bionic corrugated composite layer graphite sheet elastic structure comprises the following steps performed in sequence: Step S1: applying a rubber layer to the upper and lower layers of the wavy flexible graphite to obtain an initial graphite product: Step S2: hot pressing the initial graphite product by a hot press to obtain a hot pressed graphite product; Step S3: Laminating the non-glue surface of the TPU glue with two layers of silicone protective films to obtain a TPU layer (1), and assembling the TPU layer (1) onto the hot-pressed graphite product by alignment and positioning to obtain a bionic corrugated composite layer graphite sheet elastic structure.

5. The process for preparing a bionic corrugated composite layer graphite sheet elastic structure according to claim 4, characterized in that: Step S1 includes: Step S11: using a laminating machine to sequentially laminate the wavy flexible graphite, the first viscous silicone protective film, and the second viscous silicone protective film from top to bottom to obtain a first coating material; Step S12: The first coating material obtained in step S11 is passed through a die-cutting machine, and two tapes are attached to the edge of the graphite for machine waste discharge; the first die cutter is used to punch the graphite surface to cut the first coating material into a plurality of second-shaped areas, the outer frame of the second-shaped area is half-cut from the first adhesive silicone protective film, and the positioning holes of the second-shaped area are completely cut off; Step S13: laminating the upper end of the graphite of the first coating obtained in step S12 with the PSA adhesive with the self-contained release film 1 torn off by a laminating machine, laminating the self-contained release film 2 with the PSA adhesive torn off with the release surface of the first release film, tearing off the first sticky silicone protective film and the second sticky silicone protective film on the laminating machine, laminating the first insulating film single-sided adhesive with the lower end of the graphite of the first coating; laminating the lower end of the antistatic protective film with the pad knife release film, and then laminating the antistatic protective film with the first insulating film single-sided adhesive to form a graphite strip; After the graphite strip is turned over, it is die-cut toward the pad knife release film, half-cut to the pad knife release film, and then the pad knife release film is pulled away, and then the first single-layer silicone protective film is attached to the antistatic protective film, and then rolled up to obtain the graphite semi-finished product; Step S14: laminating the second release film, the second insulating film single-sided adhesive, the second single-layer silicone protective film, and the third adhesive silicone protective film in sequence by a laminating machine to obtain a second covering material, punching out a plurality of first-shaped areas on the release surface of the second covering material by a second die cutter, half of the outer frame of the first-shaped area is cut to the second single-layer silicone protective film, and the second insulating film single-sided adhesive and the positioning holes cannot be missing in the first-shaped area; discarding the waste of the second release film, and then rolling up to obtain the second covering material semi-finished product; Step S15: manually assembling the graphite semi-finished product and the second coated semi-finished product with a jig: removing the second single-layer silicone protective film and the third adhesive silicone protective film of the second coated semi-finished product, and removing the first release film of the graphite semi-finished product, and laminating the second insulating film single-sided adhesive of the second coated semi-finished product with the PSA adhesive of the graphite semi-finished product to obtain a first assembled semi-finished product; Step S16: Place the first assembled semi-finished product on a laminating machine, then remove the second release film, stick a third release film on the second insulating film single-sided adhesive of the first assembled semi-finished product, die-cut the first single-layer silicone protective film, tear the half of the part by hand to the anti-static protective film, and half of the product shape to the first single-layer silicone protective film, remove the first single-layer silicone protective film, and obtain an initial graphite product.

6. The process for preparing a bionic corrugated composite layer graphite sheet elastic structure according to claim 4, characterized in that: The hot pressing temperature is 80°C to 100°C, the hot pressing time is 10 to 15s, and the hot pressing pressure is 80-100N.

7. The process for preparing a bionic corrugated composite layer graphite sheet elastic structure according to claim 4, characterized in that: Before using the current hot press to perform the batch step S2 on the current batch of initial graphite products, a step S20 is performed: determining the target hot press control parameters for performing the batch step S2 on the current batch of initial graphite products by testing; The current hot press performs hot pressing on the current batch of initial graphite products during batch step S2 based on the target hot pressing control parameters obtained in the corresponding step S20.

8. The process for preparing a bionic corrugated composite layer graphite sheet elastic structure according to claim 7, characterized in that: Step S20 includes: Step S201: obtaining information of materials of each layer of the upper structure and each layer of the lower structure of the wavy flexible graphite in a single current batch of initial graphite products, wherein the information of the materials includes: material thickness and specific heat capacity of the material; Step S202: obtaining a required hot pressing time range, a required hot pressing temperature range, and a required preheating temperature range of a single current batch of initial graphite products; Step S203: obtaining the thermal efficiency of the device for heating the upper structure of the corrugated flexible graphite and the thermal efficiency of the device for heating the lower structure of the corrugated flexible graphite of the current hot press that is most recently determined before the current step S20 is executed; Step S204: Calculating a first target working power of a device of the current hot press that heats the lower structure of the corrugated flexible graphite corresponding to the current batch of initial graphite products based on steps S201 to S203; Step S205: Control the device of the current hot press that heats the lower structure of the wavy flexible graphite with the first target working power obtained in step S204 and control the temperature measuring module 2 to work in real time, preheat the current batch of initial graphite product samples until the detection value of the temperature measuring module 2 is the minimum value of the required preheating temperature range of the current batch of initial graphite products, and then control the temperature measuring module 1 and the temperature measuring module 2 to synchronously measure the temperature H times until any one of the detection value of the temperature measuring module 1 and the detection value of the temperature measuring module 2 is equal to the maximum value of the required preheating temperature range of the current batch of initial graphite products, and time the working time of the temperature measuring module 2, and calculate the absolute value of the difference between the detection values ​​of the temperature measuring module 1 and the temperature measuring module 2 in each synchronous temperature measurement; the temperature measuring module 2 is used to detect the surface temperature of the lower structure of the wavy flexible graphite of the initial graphite product sample, and the temperature measuring module 1 is used to detect the surface temperature of the upper structure of the wavy flexible graphite of the initial graphite product sample; Determine that the detection value of the temperature measurement module 1 of the target synchronous temperature measurement is the target preheating temperature of the upper structure of the current batch of initial graphite products, and determine that the detection value of the temperature measurement module 2 of the target synchronous temperature measurement is the target preheating temperature of the lower structure of the current batch of initial graphite products; in the H-time synchronous temperature measurement, the absolute value of the difference between the detection values ​​of the temperature measurement module 1 and the temperature measurement module 2 of the target synchronous temperature measurement is the smallest; Step S206: Based on steps S201-S205, calculate the target preheating time of the current batch of initial graphite products, the target hot pressing time of the current batch of initial graphite products by the current hot press, and the second target working power of the device of the current hot press that heats the upper structure of the corrugated flexible graphite corresponding to the current batch of initial graphite products.

9. The process for preparing a bionic corrugated composite layer graphite sheet elastic structure according to claim 4, characterized in that: During the operation of the hot press, the thermal efficiency of the device for heating the upper structure of the corrugated flexible graphite and the thermal efficiency of the device for heating the lower structure of the corrugated flexible graphite of the current hot press are periodically obtained based on the test; Before the hot press performs hot pressing on each batch of initial graphite products, the target quantity of each batch of initial graphite products is also determined; the process of determining the target quantity of the current batch of initial graphite products includes: Step S2001: Obtaining the entire hot pressing process of a single current batch of initial graphite products: the total heat range required for the upper structure of the corrugated flexible graphite, the total heat range required for the lower structure of the corrugated flexible graphite, the average working power and total working time of the device of the current hot press that heats the upper structure of the corrugated flexible graphite, and the average working power and total working time of the device of the current hot press that heats the lower structure of the corrugated flexible graphite; Step S2002: constructing a time-current heat press device heating the upper structure of the corrugated flexible graphite and a time-current heat press device heating the lower structure of the corrugated flexible graphite thermal efficiency change curve based on the latest several acquisitions of the thermal efficiency of the current heat press device heating the upper structure of the corrugated flexible graphite and the thermal efficiency change curve of the current heat press device heating the lower structure of the corrugated flexible graphite; Step S2003: Calculate the target quantity of the current batch of initial graphite products based on steps S2001 and S2002 .

Images