Composite damping plate and preparation method and device therefor, and vehicle

Abstract

The present application belongs to the technical field of vehicle parts, and relates to a composite damping plate and a preparation method and device therefor, and a vehicle. The composite damping plate comprises a first metal plate, a second metal plate, and a damping adhesive film, wherein the damping adhesive film is arranged between the first metal plate and the second metal plate; and the first metal plate, the damping adhesive film, and the second metal plate are connected in sequence in the direction of thickness.

Description

Composite damping plate and its preparation method, preparation device, and vehicle

[0001] This application claims priority to Chinese Patent Application No. 202411527049.2, filed on October 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of vehicle component technology, and in particular to a composite damping plate, its preparation method, preparation device, and vehicle. Background Technology

[0003] With socio-economic development, noise pollution has gradually attracted people's attention, ranking alongside air and water pollution as one of the world's three major pollutants. As automobiles are currently a common means of transportation, people are increasingly concerned about the quality of noise control within vehicles. The level of noise control within vehicles has gradually become one of the important indicators for measuring the safety and comfort of a vehicle. Damping steel plates can be used to control noise within vehicles.

[0004] In related technologies, damping steel plates are mainly obtained by coating damping adhesive onto a steel plate and then laminating them together. However, the coating process has low utilization efficiency of the damping adhesive, high cost, and poor thickness uniformity, resulting in unstable peel strength and damping noise reduction effect of the damping steel plate, which affects the application effect of the damping steel plate. Technical issues

[0005] The purpose of this application is to improve the utilization efficiency of damping adhesive and enhance the performance stability of damping steel plates. Technical solutions

[0006] This application provides a composite damping plate, including a first metal plate, a second metal plate, and a damping film. The damping film is disposed between the first and second metal plates, and the first metal plate, the damping film, and the second metal plate are sequentially connected along their thickness direction.

[0007] This application also provides a method for preparing a composite damping plate, which includes: combining a damping film with a first metal plate to form a first composite metal plate; combining the first composite metal plate with a second metal plate such that the side of the first composite metal plate in which the damping film is disposed is bonded to the second metal plate to form a second composite metal plate; and curing the second composite metal plate to form a composite damping plate.

[0008] This application also provides an apparatus for preparing a composite damping plate, comprising: a first unwinding structure configured to unwind a damping film; a second unwinding structure configured to unwind a first metal plate; a first roll forming structure configured to roll the unwound damping film and the first metal plate to form a first composite metal plate; a third unwinding structure configured to unwind a second metal plate; a second roll forming structure configured to roll the first composite metal plate and the unwound second metal plate to form a second composite metal plate; and a curing structure configured to cure the second composite metal plate to obtain a composite damping plate.

[0009] This application also provides a vehicle comprising the composite damping plate as described above, and / or a composite damping plate prepared by the method described above, and / or a composite damping plate prepared by the apparatus described above. Beneficial effects

[0010] The composite damping plate provided in this application, by using a damping adhesive film instead of directly coating the damping adhesive in related technologies, allows for controllable thickness of the damping adhesive film and improved thickness uniformity in different areas. This results in a composite damping plate with both good peel strength and damping factor, enhanced peel strength, stamping performance, high-temperature resistance, and damping noise reduction performance throughout the composite damping plate, while maintaining good uniformity. Furthermore, the damping adhesive film also improves the utilization rate of the damping adhesive and reduces or avoids adhesive overflow during the lamination process between the damping adhesive film and the first and second metal plates, thereby increasing production efficiency and reducing production costs. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the structure of the composite damping plate provided in an exemplary embodiment of this application;

[0012] Figure 2 is a schematic diagram of the manufacturing process of the composite damping plate provided in an exemplary embodiment of this application;

[0013] Figure 3 is a structural schematic diagram of the vehicle provided in an exemplary embodiment of this application.

[0014] Explanation of reference numerals in the attached drawings: 10, composite damping plate; 1, first metal plate; 2, second metal plate; 3, damping film; 101, first unwinding structure; 102, second unwinding structure; 103, third unwinding structure; 104, first winding structure; 105, second winding structure; 111, first rolling structure; 112, second rolling structure; 121, preheating structure; 131, curing structure; 100, preparation apparatus; 200, vehicle. Embodiments of the present invention

[0015] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0016] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, where the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, where the first feature is at a lower horizontal level than the second feature.

[0017] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for distinction in description and have no special meaning.

[0018] This application provides a composite damping plate 10, as shown in Figure 1, comprising a first metal plate 1, a second metal plate 2, and a damping film 3. The damping film 3 is disposed between the first metal plate 1 and the second metal plate 2, and the first metal plate 1, the damping film 3, and the second metal plate 2 are sequentially connected. That is, the damping film 3 is sandwiched between the first metal plate 1 and the second metal plate 2, and the first metal plate 1, the damping film 3, and the second metal plate 2 are sequentially connected along the thickness direction X to form a whole.

[0019] Compared to related technologies that directly coat damping adhesive onto the steel plate surface, the thickness of the damping adhesive film 3 is controllable, improving its uniformity across different areas. When the uniformly thick damping adhesive film 3 is combined with the first metal plate 1 and the second metal plate 2 to form a composite damping plate 10, it improves the peel strength, stamping performance, high-temperature resistance, and damping noise reduction performance of the composite damping plate 10. Furthermore, the uniformity of performance across the entire composite damping plate 10 avoids or reduces significant performance differences across different areas, thus preventing overall performance degradation. In addition, the use of the damping adhesive film 3 also reduces adhesive overflow during the bonding process with the first metal plate 1 and the second metal plate 2, lowering the difficulty of removing residual adhesive, thereby improving production efficiency, reducing adhesive waste, and lowering production costs.

[0020] In some embodiments, the peeling failure type of the composite damping plate 10 is cohesive failure.

[0021] Cohesive failure refers to a situation where, during the peeling process, the damage primarily occurs within the damping membrane, rather than at the adhesive interface between the damping membrane and the first or second metal plate. Compared to ordinary interface failure, cohesive failure exhibits higher peel strength.

[0022] In some embodiments, the first metal plate 1 comprises either an electro-galvanized steel plate or a stainless steel plate. Electro-galvanized steel plates and stainless steel plates have good stamping properties, which is beneficial for forming the composite damping plate 10 through stamping. Furthermore, electro-galvanized steel plates and stainless steel plates have good surface corrosion resistance, and can maintain a good surface condition without corrosion before being laminated with the damping film 3, thereby ensuring a good interface when laminated with the damping film 3.

[0023] In some embodiments, for similar reasons, the second metal plate 2 comprises one of electro-galvanized steel plate and stainless steel plate.

[0024] It is understandable that the first metal plate 1 and the second metal plate 2 can be made of the same steel plate or different steel plates. For example, the first metal plate 1 is made of electro-galvanized steel plate, while the second metal plate 2 is made of stainless steel plate, or both the first metal plate 1 and the second metal plate 2 are made of electro-galvanized steel plate.

[0025] In some embodiments, the material of the damping membrane 3 includes one of nitrile rubber, butyl rubber, and silicone rubber. Nitrile rubber, butyl rubber, and silicone rubber have good damping factors, and using them as materials for the damping membrane 3 can achieve good damping and noise reduction effects. Furthermore, using one of these materials for the damping membrane 3 also allows for good bonding between the damping membrane 3 and the first metal plate 1 and the second metal plate 2, thereby improving the overall performance of the composite damping plate 10.

[0026] In some embodiments, the thickness of the damping film 3 is 30μm-80μm. The thickness of the first metal plate 1 is 0.4mm-2.0mm, and / or the thickness of the second metal plate 2 is 0.4mm-2.0mm.

[0027] That is, the thickness of the damping film 3 is 30μm-80μm. And the thickness of the first metal plate 1 and the second metal plate 2 is both 0.4mm-2.0mm, or the thickness of one of the first metal plate 1 and the second metal plate 2 is 0.4mm-2.0mm.

[0028] The thicknesses of the first metal plate 1, the second metal plate 2, and the damping film 3 are related to the damping factor of the composite damping plate 10. By controlling the thickness of the damping film 3 within the aforementioned range, the composite damping plate 10 can achieve both good damping factor and peel strength, thus improving its overall performance. When the thickness of the damping film 3 is greater than 80 μm, it can easily lead to excessive shrinkage internal stress in the composite damping plate 10, thereby affecting its peel strength. Conversely, when the thickness of the damping film 3 is less than 30 μm, both the damping factor and peel strength of the composite damping plate 10 decrease. Furthermore, controlling the thicknesses of the first metal plate 1 and the second metal plate 2 within the aforementioned range can also help improve the damping factor and peel strength of the composite damping plate 10 while controlling its cost. When the thicknesses of the first metal plate 1 and the second metal plate 2 are too large, the cost will increase accordingly, and excessive thickness of the first metal plate 1 and the second metal plate 2 will also lead to a decrease in the peel strength of the composite damping plate 10.

[0029] Therefore, in this embodiment of the application, the thickness of the damping film 3, the first metal plate 1, and the second metal plate 2 are controlled within the above-mentioned range so that the composite damping plate 10 can have both good damping factor and peel strength.

[0030] For example, the thickness of the damping film 3 can be set to 30μm, 40μm, 50μm, 60μm, 70μm, or 80μm. The thickness of the first metal plate 1 can be set to 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.5mm, or 2.0mm. The thickness of the second metal plate 2 can be set to 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.5mm, or 2.0mm.

[0031] In some embodiments, the thickness of the damping film 3 is 40 μm-50 μm. The thickness of the first metal plate 1 is 0.7 mm-0.8 mm, and / or the thickness of the second metal plate 2 is 0.7 mm-0.8 mm. In order to improve the damping factor and peel strength of the composite damping plate 10, the thicknesses of the damping film 3, the first metal plate 1, and the second metal plate 2 are limited to the above-mentioned ranges in the embodiments of this application.

[0032] In some embodiments, the peel strength of the composite damping plate 10 is greater than or equal to 68N. That is, the peel strength between adjacent layers in the composite damping plate 10, such as between the first metal plate 1 and the damping film 3, or between the second metal plate 2 and the damping film 3, is greater than or equal to 68N, thereby enabling it to resist external impacts and pressures, extend the service life of the composite damping plate 10, and the high peel strength also helps to reduce the transmission of noise caused by vibration, improve sound insulation performance, and enhance structural stability.

[0033] According to a second aspect of this application, a method for preparing a composite damping plate 10 is also provided, comprising:

[0034] The damping film 3 is combined with the first metal plate 1 to form the first composite metal plate;

[0035] The first composite metal plate is combined with the second metal plate 2, so that the side of the first composite metal plate in which the damping film 3 is disposed is attached to the second metal plate 2 to form the second composite metal plate.

[0036] The second composite metal plate is cured to form a composite damping plate 10.

[0037] In this embodiment, the damping film 3 is first laminated with the first metal plate 1, so that the damping film 3 is bonded to the first metal plate 1 to form a first composite metal plate. Then, the first composite metal plate is laminated with the second metal plate 2, so that the damping film 3 is sandwiched between the first metal plate 1 and the second metal plate 2 to form a second composite metal plate. After the second composite metal plate is cured, the composite damping plate 10 can be prepared.

[0038] The composite damping plate 10 prepared by the method provided in this application embodiment allows for precise control of its thickness and dimensions, and exhibits excellent peel strength, stamping performance, high-temperature resistance, and damping noise reduction performance. Furthermore, because the damping adhesive is prepared as a damping film, issues such as adhesive overflow and uneven thickness caused by directly coating the damping adhesive onto the steel plate can be reduced or avoided, thereby improving production efficiency and reducing production costs.

[0039] In some embodiments, before bonding the damping film 3 to the first metal plate 1, the method further includes:

[0040] A damping adhesive solution is prepared by adding the damping adhesive to a solvent.

[0041] The damping adhesive solution is coated onto the release film, and the solvent is removed by heating, forming a damping adhesive film 3 on the release film.

[0042] Release film refers to a film whose surface film can be distinguished. Release film and damping adhesive are not sticky or have slight stickiness after contact.

[0043] By adding damping adhesive to a solvent to prepare a damping adhesive solution, it is easy to uniformly coat the damping adhesive onto the release film. After heating and baking to remove the solvent from the damping adhesive solution, a damping adhesive film 3 is formed. To facilitate the subsequent preparation of the composite damping plate 10 using the damping adhesive film 3, the prepared damping adhesive film 3 and the release film can be rolled together to form a damping adhesive film roll.

[0044] After the damping film is prepared into a damping film roll, the thickness uniformity of the damping film can be improved, the performance stability can be improved, and the efficiency of subsequent processes can be improved.

[0045] Furthermore, related technologies typically employ online direct coating of damping adhesive, which easily releases harmful gases and imposes stringent environmental compliance requirements on the manufacturing facilities for the composite damping plate 10. In contrast, the embodiments of this application enable the damping adhesive film to be applied outside the manufacturing facility for the composite damping plate 10, thereby reducing the environmental compliance requirements for the composite damping plate 10 manufacturing facility and lowering costs.

[0046] In some embodiments, the damping film 3 is composited with the first metal plate 1, including:

[0047] The damping film 3 and the first metal plate 1 are rolled together under conditions of 0℃-100℃.

[0048] It is understandable that, within a reasonable temperature range, the higher the lamination temperature, the higher the peel strength. However, if the lamination temperature is too high, it can easily lead to defects in the separation of the damping film 3 and the release film. This is mainly because, when the temperature is too high, the release force of the damping film 3 changes, making it difficult to detach from the release film, thus making it difficult for the damping film 3 to effectively laminate with the first metal plate 1. Therefore, in this embodiment, the damping film 3 and the first metal plate 1 are rolled and laminated under conditions of 0℃-100℃.

[0049] In order to improve the release strength of the damping film 3 and the first metal plate 1 after they are combined, while ensuring that the damping film 3 and the first metal plate 1 can be effectively combined, the composite temperature is set to 80℃-100℃ in this embodiment.

[0050] In some embodiments, prior to bonding the composite steel plate with the second metal plate 2, the method further includes:

[0051] The second metal plate 2 is preheated, and the preheating temperature is set to 50℃-200℃.

[0052] Preheating the second metal plate 2 can improve the peel strength of the composite material of the damping film 3 and the second metal plate 2. However, if the preheating temperature is too high, the second metal plate 2 is easily oxidized, leading to changes in its surface state, which is detrimental to the bonding between the second metal plate 2 and the damping film 3. Therefore, the preheating temperature of the second metal plate 2 is set to 50℃-200℃.

[0053] For example, the preheating temperature can be set to 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, or 200°C.

[0054] To ensure the peel strength after the second metal plate 2 is bonded to the first composite metal plate, the preheating temperature of the second metal plate 2 is set to 100℃-120℃.

[0055] In some embodiments, a first composite metal plate and a second metal plate 2 are composited, such that the side of the first composite metal plate in which the damping film 3 is disposed is bonded to the second metal plate 2, including:

[0056] The side of the first composite metal plate in which the damping film 3 is disposed is attached to the second metal plate 2;

[0057] The first composite metal plate and the second metal plate 2 are hot-pressed together, wherein the pressure of hot-pressing is set to 4 MPa-8 MPa and the temperature is set to 100℃-300℃.

[0058] During the hot-pressing process, higher pressure results in better hot-pressing effects and higher bonding strength between the damping film 3 and the first metal plate 1 and the second metal plate 2. However, excessive pressure can easily lead to adhesive overflow, causing the damping film 3 to become thinner and affecting the peel strength of the composite damping plate 10. Adhesive overflow can also cause poor appearance and affect production yield. Therefore, the hot-pressing pressure is set between 4 MPa and 8 MPa.

[0059] For example, the pressure for hot-pressing can be set to 4 MPa, 5 MPa, 6 MPa, 7 MPa or 8 MPa.

[0060] The hot-pressing pressure is set to 6 MPa-8 MPa, which reduces adhesive overflow while achieving good peel strength.

[0061] During the hot-pressing process, the peel strength initially increases and then decreases with rising temperature. This is mainly because the bonding between the damping film 3 and the first metal plate 1 and the second metal plate 2 requires a certain amount of energy; the higher the temperature, the more complete the reaction and the better the bonding. However, if the temperature is too high, it will exceed the withstand temperature of the damping film 3, leading to carbonization and failure. Therefore, the hot-pressing temperature is set between 100℃ and 300℃.

[0062] For example, the hot-pressing composite temperature can be set to 100°C, 120°C, 150°C, 180°C, 200°C, 220°C, 250°C, 280°C or 300°C.

[0063] The temperature for hot-pressing composite is set to 150℃-200℃.

[0064] In some embodiments, during the process of bonding the first composite metal plate with the second metal plate 2, three pairs of rollers are used for hot pressing. The three pairs of rollers can fully exert the hot pressing effect and improve the peel strength of the composite damping plate 10.

[0065] It is understandable that the hot pressing temperature and pressure of the three pairs of rollers can be the same or different.

[0066] In some embodiments, curing the second composite metal plate includes:

[0067] The second composite metal plate was cured at 100℃-200℃.

[0068] Curing is performed to improve the bonding performance between the first metal plate 1, the damping adhesive film 3, and the second metal plate 2. Similar to the hot-pressing process, the peel strength initially increases and then decreases as the curing temperature rises. Therefore, the curing temperature is set between 100℃ and 200℃.

[0069] For example, the curing temperature can be set to 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C or 200°C.

[0070] The curing temperature is set to 120℃-160℃.

[0071] In some embodiments, the lamination speed of the damping film 3 and the first metal plate 1 is 4 m / min-12 m / min. Too slow a lamination speed will affect the production efficiency of the composite damping plate 10, while too fast a lamination speed can easily lead to insufficient solvent evaporation in the damping film 3, thus affecting the bonding between the damping film 3 and the first metal plate 1 and the second metal plate 2. Furthermore, too fast a lamination speed can also easily lead to defects in the bonding between the damping film 3 and the first metal plate 1 and the second metal plate 2. Therefore, the lamination speed of the damping film 3 and the first metal plate 1 is set to 4 m / min-12 m / min to ensure production efficiency while reducing or avoiding defects and improving bonding quality.

[0072] For example, the compounding speed can be set to 4 m / min, 5 m / min, 6 m / min, 7 m / min, 8 m / min, 9 m / min, 10 m / min, 11 m / min or 12 m / min.

[0073] It is understandable that the bonding speed refers to the rate at which the damping diaphragm 3 and the first metal plate 1 bond together using a bonding process. That is, the length of bonding between the damping diaphragm 3 and the first metal plate 1 per unit time. For example, a bonding speed of 4 m / min means that the length of bonding between the damping diaphragm 3 and the first metal plate 1 is 4 meters per minute.

[0074] In some embodiments, similarly, the composite speed of the first composite metal plate and the second metal plate 2 is 4m / min-12m / min.

[0075] In some embodiments, the compounding speed may be 7 m / min-8 m / min.

[0076] According to a third aspect of this application, referring to FIG2, a composite damping plate preparation apparatus 100 is also provided, comprising a first unwinding structure 101, a second unwinding structure 102, a first roll forming structure 111, a third unwinding structure 103, a second roll forming structure 112, and a curing structure 131. The first unwinding structure 101 is configured to unwind a damping film 3, the second unwinding structure 102 is configured to unwind a first metal plate 1, the first roll forming structure 111 is configured to roll the unwound damping film 3 and the first metal plate 1 to form a first composite metal plate, the third unwinding structure 103 is configured to unwind a second metal plate 2, the second roll forming structure 112 is configured to roll the first composite metal plate and the unwound second metal plate 2 to form a second composite metal plate, and the curing structure 131 is configured to cure the second composite metal plate to obtain a composite damping plate 10.

[0077] In some embodiments, the composite damping plate preparation apparatus 100 further includes a preheating structure 121, which is disposed between the third unwinding structure 103 and the second rolling structure 112. The preheating structure 121 is configured to preheat the unwound second metal plate 2, and the preheated second metal plate 2 enters the second rolling structure 112.

[0078] The following describes the fabrication process of the composite damping plate 10 using a specific composite damping plate fabrication apparatus 100 as an example:

[0079] Referring to Figure 2, the first unwinding structure 101 and the second unwinding structure 102 are used to unwind the damping film and the first metal plate 1, respectively. The first roll pressing structure 111 is used to hot-press the unwound damping film and the first metal plate 1 to form a first composite metal plate. The first winding structure 104 is used to wind up the release film in the damping film, which can be reused after winding. The third unwinding structure 103 is used to unwind the second metal plate 2. The unwound second metal plate 2 is preheated in the preheating structure 121, and then hot-pressed with the first composite metal plate in the second roll pressing structure 112 to form a second composite metal plate. After the second composite metal plate undergoes the pressing process, it enters the curing structure 131 for heating and curing, and finally is wound up by the second winding structure 105 to obtain the composite damping plate 10.

[0080] According to a fourth aspect of this application, referring to Figure 3, a vehicle 200 is also provided, including the composite damping plate 10 as described above, and / or the composite damping plate 10 prepared by the method described above. This vehicle possesses all the beneficial effects of the aforementioned composite damping plate 10, which will not be elaborated further herein.

[0081] The preparation method of the composite damping plate 10 provided in this application embodiment is described below with reference to specific embodiments:

[0082] Example 1

[0083] In this embodiment, the material of the damping diaphragm 3 is nitrile rubber, the first metal plate 1 and the second metal plate 2 are both stainless steel plates, and the thickness of the first metal plate 1 and the second metal plate 2 is 0.75mm.

[0084] Nitrile rubber is plasticized and then added to ethyl acetate solvent, and stirred thoroughly to obtain a rubber solution. Then, a curing agent, i.e., a dicyandiamide compound, is added to propylene glycol methyl ether solvent and stirred until completely dissolved to obtain a curing agent solution. Finally, the rubber solution and curing agent solution are mixed and stirred thoroughly to obtain a damping adhesive aqueous solution.

[0085] A damping adhesive aqueous solution is coated onto a release film to form a damping adhesive film 3, which is then wound to form a damping adhesive film roll; wherein, the thickness of the damping adhesive film 3 is 45μm;

[0086] The damping film 3 is composited with the first metal plate 1 at a temperature of 90°C to obtain the first composite metal plate.

[0087] After the second metal plate 2 is preheated at 110°C, it is hot-pressed with the first composite metal plate to obtain the second composite metal plate. The hot-pressing temperature is 180°C and the pressure is 7 MPa.

[0088] The second composite metal plate was cured at 140°C to obtain the composite damping plate 10.

[0089] Example 2

[0090] The difference between this embodiment and Embodiment 1 is that the thickness of the first metal plate 1 and the second metal plate 2 is 0.7 mm, while the other conditions are the same as in Embodiment 1.

[0091] Example 3

[0092] The difference between this embodiment and Embodiment 1 is that the thickness of the first metal plate 1 and the second metal plate 2 is 0.8 mm, while the other conditions are the same as in Embodiment 1.

[0093] Example 4

[0094] The difference between this embodiment and Embodiment 1 is that the thickness of the damping film 3 is 40 μm, while the other conditions are the same as in Embodiment 1.

[0095] Example 5

[0096] The difference between this embodiment and Embodiment 1 is that the thickness of the damping film 3 is 50 μm, while the other conditions are the same as in Embodiment 1.

[0097] Example 6

[0098] The difference between this embodiment and Embodiment 1 is that the damping film 3 and the first metal plate 1 are composited at a temperature of 80°C, while the other conditions are the same as in Embodiment 1.

[0099] Example 7

[0100] The difference between this embodiment and Embodiment 1 is that the damping film 3 and the first metal plate 1 are composited at a temperature of 100°C, while the other conditions are the same as in Embodiment 1.

[0101] Example 8

[0102] The difference between this embodiment and Embodiment 1 is that the preheating temperature of the second metal plate 2 is 100°C, while the other conditions are the same as in Embodiment 1.

[0103] Example 9

[0104] The difference between this embodiment and Embodiment 1 is that the preheating temperature of the second metal plate 2 is 120°C, while the other conditions are the same as in Embodiment 1.

[0105] Example 10

[0106] The difference between this embodiment and Embodiment 1 is that the hot-pressing pressure of the second metal plate 2 and the first composite metal plate is 6 MPa, while the other conditions are the same as in Embodiment 1.

[0107] Example 11

[0108] The difference between this embodiment and Embodiment 1 is that the hot-pressing pressure of the second metal plate 2 and the first composite metal plate is 8 MPa, while the other conditions are the same as in Embodiment 1.

[0109] Example 12

[0110] The difference between this embodiment and Embodiment 1 is that the hot-pressing temperature of the second metal plate 2 and the first composite metal plate is 150°C, while the other conditions are the same as in Embodiment 1.

[0111] Example 13

[0112] The difference between this embodiment and Embodiment 1 is that the hot-pressing temperature of the second metal plate 2 and the first composite metal plate is 200°C, while the other conditions are the same as in Embodiment 1.

[0113] Example 14

[0114] The difference between this embodiment and Embodiment 1 is that the curing temperature of the second composite metal plate is 120°C, while the other conditions are the same as in Embodiment 1.

[0115] Example 15

[0116] The difference between this embodiment and Embodiment 1 is that the curing temperature of the second composite metal plate is 160°C, while the other conditions are the same as in Embodiment 1.

[0117] Example 16

[0118] The difference between this embodiment and Embodiment 1 is that the material of the damping diaphragm 3 is butyl rubber, the first metal plate 1 is an electro-galvanized steel plate, the second metal plate 2 is a stainless steel plate, and the thickness of both the first metal plate 1 and the second metal plate 2 is 0.4 mm. The other conditions are the same as in Embodiment 1.

[0119] Example 17

[0120] The difference between this embodiment and Embodiment 1 is that the material of the damping diaphragm 3 is silicone rubber, the first metal plate 1 is stainless steel plate, the second metal plate 2 is electro-galvanized steel plate, and the thickness of both the first metal plate 1 and the second metal plate 2 is 2mm. The other conditions are the same as in Embodiment 1.

[0121] Example 18

[0122] The difference between this embodiment and Embodiment 1 is that the material of the damping diaphragm 3 is silicone rubber, the first metal plate 1 and the second metal plate 2 are both electro-galvanized steel plates, the thickness of the damping diaphragm 3 is 30μm, and the other conditions are the same as in Embodiment 1.

[0123] Example 19

[0124] The difference between this embodiment and Embodiment 1 is that the thickness of the damping film 3 is 80 μm, while the other conditions are the same as in Embodiment 1.

[0125] Example 20

[0126] The difference between this embodiment and Embodiment 1 is that the damping film 3 and the first metal plate 1 are composited at a temperature of 0°C, while the other conditions are the same as in Embodiment 1.

[0127] Example 21

[0128] The difference between this embodiment and Embodiment 1 is that the preheating temperature of the second metal plate 2 is 50°C, while the other conditions are the same as in Embodiment 1.

[0129] Example 22

[0130] The difference between this embodiment and Embodiment 1 is that the preheating temperature of the second metal plate 2 is 200°C, while the other conditions are the same as in Embodiment 1.

[0131] Example 23

[0132] The difference between this embodiment and embodiment 1 is that the hot-pressing pressure of the second metal plate 2 and the first composite metal plate is 4 MPa, while the other conditions are the same as in embodiment 1.

[0133] Example 24

[0134] The difference between this embodiment and Embodiment 1 is that the hot-pressing temperature of the second metal plate 2 and the first composite metal plate is 100°C, while the other conditions are the same as in Embodiment 1.

[0135] Example 25

[0136] The difference between this embodiment and Embodiment 1 is that the hot-pressing temperature of the second metal plate 2 and the first composite metal plate is 300°C, while the other conditions are the same as in Embodiment 1.

[0137] Example 26

[0138] The difference between this embodiment and Embodiment 1 is that the curing temperature of the second composite metal plate is 100°C, while the other conditions are the same as in Embodiment 1.

[0139] Example 27

[0140] The difference between this embodiment and Embodiment 1 is that the curing temperature of the second composite metal plate is 200°C, while the other conditions are the same as in Embodiment 1.

[0141] Example 28

[0142] The difference between this embodiment and Embodiment 1 is that the thickness of the first metal plate 1 and the second metal plate 2 is 0.2 mm, while the other conditions are the same as in Embodiment 1.

[0143] Example 29

[0144] The difference between this embodiment and Embodiment 1 is that the thickness of the first metal plate 1 and the second metal plate 2 is 2.2 mm, while the other conditions are the same as in Embodiment 1.

[0145] Example 30

[0146] The difference between this embodiment and Embodiment 1 is that the thickness of the damping film 3 is 90 μm, while the other conditions are the same as in Embodiment 1.

[0147] Example 31

[0148] The difference between this embodiment and Embodiment 1 is that the damping film 3 and the first metal plate 1 are composited at a temperature of 110°C, while the other conditions are the same as in Embodiment 1.

[0149] Example 32

[0150] The difference between this embodiment and Embodiment 1 is that the preheating temperature of the second metal plate 2 is 30°C, while the other conditions are the same as in Embodiment 1.

[0151] Example 33

[0152] The difference between this embodiment and Embodiment 1 is that the preheating temperature of the second metal plate 2 is 220°C, while the other conditions are the same as in Embodiment 1.

[0153] Example 34

[0154] The difference between this embodiment and embodiment 1 is that the hot-pressing pressure of the second metal plate 2 and the first composite metal plate is 2 MPa, while the other conditions are the same as in embodiment 1.

[0155] Example 35

[0156] The difference between this embodiment and Embodiment 1 is that the hot-pressing pressure of the second metal plate 2 and the first composite metal plate is 10 MPa, while the other conditions are the same as in Embodiment 1.

[0157] Example 36

[0158] The difference between this embodiment and Embodiment 1 is that the hot-pressing temperature of the second metal plate 2 and the first composite metal plate is 80°C, while the other conditions are the same as in Embodiment 1.

[0159] Comparative Example 1

[0160] The difference between this comparative example and Example 4 is that after the damping adhesive is prepared into a damping adhesive solution, it is not prepared into a damping adhesive film, but is directly coated onto the first metal plate. Then, the first metal plate coated with adhesive needs to be baked in an oven at a certain temperature of 115°C for 10 minutes to fully remove the solvent.

[0161] The baked first metal plate and the preheated second metal plate are hot-pressed together to obtain a composite steel plate, and then the final curing is carried out. The remaining conditions are the same as in Example 4.

[0162] The peel strength and damping factor of the composite damping plates 10 prepared in Examples 1-36 and Comparative Example 1 were tested respectively, and the presence of adhesive overflow during the preparation of the composite damping plates 10 was recorded. The results are shown in Tables 1-3.

[0163] Table 1. Performance test results of composite damping plates in Examples 1-15

[0164] Table 2. Performance test results of composite damping plates in Examples 16-27

[0165] Table 3. Performance test results of the composite damping plate in Examples 28-36 and Comparative Example 1.

[0166] As can be seen from Tables 1-3, in the embodiments of this application, by using a damping film as the damping film 3 and combining it with the first metal plate 1 and the second metal plate 2, the resulting composite damping plate 10 can have both good peel strength and damping factor, wherein the peel strength is ≥68N / cm and the damping factor is ≥0.136.

[0167] Comparing different embodiments of this application, when the lamination temperature of the first metal plate 1 and the damping film 3 is high (e.g., in Embodiment 31, the lamination temperature is 110°C), defects such as separation of the damping film and the release film are prone to occur, posing a risk that some areas of the composite damping plate 10 may lack the damping film 3. When the pressure during the lamination of the first composite metal plate and the second metal plate 2 is high (e.g., in Embodiment 35, the pressure is 10 MPa), adhesive overflow is prone to occur, leading to a decrease in the yield of the composite damping plate 10.

[0168] When the thickness of the first metal plate 1 and the second metal plate 2 is 0.4mm-2.0mm, the thickness of the damping film 3 is 30-80μm, the composite temperature of the first metal plate 1 and the damping film 3 is 0℃-100℃, the preheating temperature of the second metal plate 2 is 50℃-200℃, the composite pressure of the first composite metal plate and the second metal plate 2 is 4-8MPa, the temperature is 100℃-300℃, and the curing temperature is 100℃-200℃, no separation defects of the damping film and the release film occur, and no glue overflow occurs. Moreover, the peel strength is ≥80N / cm, the damping factor is ≥0.100, and the performance stability of the composite damping plate 10 is improved.

[0169] When the thickness of the first metal plate 1 and the second metal plate 2 is 0.7mm-0.8mm, the thickness of the damping film 3 is 40-50μm, the composite temperature of the first metal plate 1 and the damping film 3 is 80℃-100℃, the preheating temperature of the second metal plate 2 is 100℃-120℃, the composite pressure of the first composite metal plate and the second metal plate 2 is 6-8MPa, the temperature is 150℃-200℃, and the curing temperature is 120℃-160℃, the resulting composite damping plate 10 has a peel strength ≥98N / cm and a damping factor ≥0.130. No separation defects of the damping film and the release film or adhesive overflow occurred during the preparation process, which improved the performance of the composite damping plate 10.

[0170] Peel strength was tested at 6 locations in Example 4 and Comparative Example 1, respectively. The peel strengths at 6 locations in Example 4 were 110, 99, 103, 107, 96, and 94, with an average peel strength of 102. The peel strengths at 6 locations in Comparative Example 1 were 74, 35, 48, 61, 81, and 55, with an average peel strength of 59.

[0171] Therefore, the average peel strength in Example 4 is significantly higher than that in Comparative Example 1. This is mainly because Example 4 prepares the damping adhesive into a damping film, resulting in cohesive failure of the composite damping plate, while Comparative Example 1 uses a coating method, resulting in interfacial failure of the composite damping plate. Furthermore, the difference in peel strength at six locations is smaller in Example 4, while the difference is significant in Comparative Example 1, indicating that Example 4, compared to Comparative Example 1, exhibits improved uniformity and stability, significantly enhancing the relevant performance.

[0172] In summary, by using a damping film instead of the preparation method of directly coating the damping adhesive onto the steel plate in related technologies, the composite damping plate 10 obtained in this application can have both good peel strength and damping factor, and significantly reduce the risk of uneven distribution of the damping film 3 and adhesive overflow, thereby improving the performance and stability of the composite damping plate 10.

Claims

1. A composite damping plate (10), comprising a first metal plate (1), a second metal plate (2), and a damping film (3); in, The damping film (3) is disposed between the first metal plate (1) and the second metal plate (2); The first metal plate (1), the damping film (3), and the second metal plate (2) are connected sequentially along the thickness direction.

2. The composite damping plate (10) according to claim 1, wherein, The peeling failure type of the composite damping plate (10) is cohesive failure.

3. The composite damping plate (10) according to claim 1 or 2, wherein, The first metal plate (1) includes either an electro-galvanized steel plate or a stainless steel plate; And / or, the second metal plate (2) includes one of electro-galvanized steel plate and stainless steel plate.

4. The composite damping plate (10) according to any one of claims 1-3, wherein, The material of the damping membrane (3) includes one of nitrile rubber, butyl rubber and silicone rubber.

5. The composite damping plate (10) according to any one of claims 1-4, wherein, The thickness of the damping film (3) is 30μm-80μm.

6. The composite damping plate (10) according to any one of claims 1-5, wherein, The thickness of the first metal plate (1) is 0.4mm-2.0mm, and / or the thickness of the second metal plate (2) is 0.4mm-2.0mm.

7. The composite damping plate (10) according to claim 5, wherein, The thickness of the damping film (3) is 40μm-50μm.

8. The composite damping plate (10) according to claim 6, wherein, The thickness of the first metal plate (1) is 0.7mm-0.8mm, and / or the thickness of the second metal plate (2) is 0.7mm-0.8mm.

9. The composite damping plate (10) according to any one of claims 1-8, wherein, The peel strength of the composite damping plate (10) is greater than or equal to 68N.

10. A method for preparing a composite damping plate, used to prepare the composite damping plate (10) as described in any one of claims 1-9, comprising: The damping film (3) is combined with the first metal plate (1) to form a first composite metal plate; The first composite metal plate is combined with the second metal plate (2) so that the side of the first composite metal plate in which the damping film (3) is disposed is attached to the second metal plate (2) to form the second composite metal plate; The second composite metal plate is cured to form the composite damping plate (10).

11. The method for preparing the composite damping plate according to claim 10, wherein, Before the process of bonding the damping film (3) to the first metal plate (1), the process further includes: A damping adhesive solution is prepared by adding the damping adhesive to a solvent. The damping adhesive solution is coated onto a release film, and the solvent is removed by heating to form the damping adhesive film (3) on the release film.

12. The method for preparing the composite damping plate according to claim 10 or 11, wherein, The process of combining the damping film (3) with the first metal plate (1) includes: The damping film (3) and the first metal plate (1) are rolled together under conditions of 0℃-100℃.

13. The method for preparing the composite damping plate according to any one of claims 10-12, wherein, Before the first composite metal plate is combined with the second metal plate (2), the method further includes: The second metal plate (2) is preheated at a temperature of 50℃-200℃.

14. The method for preparing the composite damping plate according to any one of claims 10-13, wherein, The step of combining the first composite metal plate with the second metal plate (2), such that the side of the first composite metal plate in which the damping film (3) is disposed is bonded to the second metal plate (2), includes: The side of the first composite metal plate in which the damping film (3) is disposed is attached to the second metal plate (2); The first composite metal plate and the second metal plate (2) are hot-pressed together, wherein the pressure of the hot-pressing is set to 4 MPa-8 MPa and the temperature is set to 100℃-300℃.

15. The method for preparing the composite damping plate according to any one of claims 10-14, wherein, The step of curing the second composite metal plate includes: The second composite metal plate is cured at 100℃-200℃.

16. The method for preparing the composite damping plate according to any one of claims 10-14, wherein, The composite speed of the damping film (3) and the first metal plate (1) is 4m / min-12m / min; And / or, the composite speed of the first composite metal plate and the second metal plate (2) is 4m / min-12m / min.

17. An apparatus (100) for preparing a composite damping plate, for preparing the composite damping plate as described in any one of claims 1-9, comprising: The first unwinding structure (101) is configured to unwind the damping diaphragm (3); The second unwinding structure (102) is configured to unwind the first metal plate (1); The first roll forming structure (111) is configured to roll form the unwound damping film (3) and the first metal plate (1) to form a first composite metal plate; The third unwinding structure (103) is configured to unwind the second metal plate (2); The second roll forming structure (112) is configured to roll the first composite metal plate and the unwound second metal plate (2) to form the second composite metal plate; The curing structure (131) is configured to cure the second composite metal plate to obtain a composite damping plate (10).

18. The apparatus (100) for preparing the composite damping plate according to claim 17, wherein, It also includes a preheating structure (121); The preheating structure (121) is disposed between the third unwinding structure (103) and the second rolling structure (112); the preheating structure (121) is configured to preheat the second metal plate (2) after unwinding, and the preheated second metal plate (2) enters the second rolling structure (112).

19. A vehicle (200) comprising a composite damping plate (10) as described in any one of claims 1-9; And / or, the composite damping plate (10) prepared by the method of preparing the composite damping plate according to any one of claims 10-16; And / or, the composite damping plate (10) prepared by the apparatus for preparing the composite damping plate as described in claim 17 or 18.

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