A composite board for the roof of a civil aircraft dining cart

Abstract

The present invention relates to the technical field of aircraft dining carts, in particular to a composite material for the roof of a hand-pushed dining cart for a civil aircraft and a preparation method thereof. The invention aims to overcome the defects of existing aircraft dining cart roof materials, such as excessive weight, insufficient temperature resistance and environmental protection problems, and to provide a new composite material alternative. The composite material structure includes high-performance carbon skins of outer and inner layers, a rubber film of the middle layer, and a core honeycomb paperboard layer. The carbon skin provides a solid shell for the roof to protect the internal structure; the rubber film plays a bonding and shock-absorbing role; the honeycomb paperboard greatly reduces the weight and provides excellent compression and impact resistance. In addition, the honeycomb paperboard is reinforced by four carbon tubes around it and bonded with foam glue to enhance the overall stability and durability of the roof. The present invention significantly improves the performance of the aircraft dining cart roof through its lightweight, high-strength and excellent toughness composite material, improves transportation efficiency and reduces fuel consumption. At the same time, its highly stable and durable characteristics ensure the safety and reliability of aircraft dining carts in complex flight environments and meet the strict requirements of modern aviation industry for high efficiency and environmental protection.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft dining carts, and in particular to a composite material for a roof plate of an aircraft dining cart and a preparation method thereof. Background Art

[0002] When designing and manufacturing aircraft catering carts, material selection is critical to ensure the product is lightweight, strong and durable. The top plate of the catering cart needs to support food, tableware and drinks while being able to withstand the vibration and impact of the aircraft during flight.

[0003] Traditional aircraft dining cart roofs are usually made of aluminum alloy, stainless steel, fiberglass composite materials, or plastics. However, these materials have various problems, such as aluminum alloy is heavy, fiberglass composite materials are not suitable for high temperature environments, plastic materials are easily oxidized, difficult to recycle and degrade, and have poor strength and rigidity. In addition, for traditional materials, when items are placed on the dining cart roof, the material will be warped around and have poor stability. Therefore, the present invention aims to provide a new material for replacing traditional dining cart roof materials. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The present invention aims to solve the problems existing in the materials of the roof of traditional aircraft catering carts and proposes a new composite material specially designed for the roof of civil aircraft catering carts. The composite material structure includes a core honeycomb paperboard and a high-performance carbon skin and film tightly wrapped around it. The surrounding carbon tubes further enhance the overall stability of the roof while reducing weight and cost. This environmentally friendly and efficient design significantly improves the mechanical properties of the roof and meets the needs of the modern aviation industry.

[0006] Therefore, it is necessary to invent a composite material for the roof of a hand-pushing dining car for a civil aircraft to solve the above problems.

[0007] (II) Technical solution

[0008] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0009] In detail, the structure of this composite material is as follows: the outermost layers, namely the first and fifth layers, are composed of high-performance carbon skins, which provide a solid shell for the entire structure and protect the internal layers from the external environment; the middle second and fourth layers are composed of a material called adhesive film, which acts as a binder and also provides a certain shock-absorbing function; the third layer located in the core position is a honeycomb paperboard surrounded by carbon tubes. The honeycomb structure of this material not only greatly reduces the overall weight, but also provides excellent compression and impact resistance due to its special geometric structure.

[0010] The third layer of honeycomb paperboard has four carbon tubes around it, and its weight is designed to maximize stability and durability. Specifically, the carbon tubes are precisely processed to form an interlocking structure with the edges of the honeycomb paperboard, and the carbon tubes and the honeycomb paperboard are connected with a film. This connection method ensures that when the aircraft dining cart experiences severe vibration or strong impact, the various parts can still be tightly connected to prevent the structure from loosening or breaking.

[0011] Preferably, the carbon skin in the composite material of the top plate of an aircraft dining cart is made of carbon fiber, which is characterized by being light in weight, having good strength and rigidity, and being relatively environmentally friendly. By adopting this material, an aircraft dining cart that is both light and strong can be manufactured, which can improve transportation efficiency while reducing aircraft fuel consumption and operating costs. Due to the high elastic modulus and high tensile strength of the material, the aircraft dining cart can maintain stability and durability in long-term use, and is not easily damaged even under high load or in flight conditions that experience severe vibration.

[0012] Preferably, a film in a composite material for the roof of an aircraft dining car is characterized by being light in weight, low in cost, good in strength and stiffness, and having good shock and vibration reduction properties. By adopting the film in such a composite material, the roof of the aircraft dining car is not only lightweight and cost-effective, but also improves its structural strength and stiffness, ensuring stability and durability during flight. In particular, the good shock and vibration reduction properties of the film material can effectively absorb and disperse the vibrations generated by the aircraft during operation, provide additional protection for items in the aircraft dining car, and reduce damage to tableware and food caused by turbulence in flight or impact of landing.

[0013] Preferably, a honeycomb paperboard in a composite material for the ceiling of an aircraft dining car is characterized by being light in weight and low in density, while being able to effectively reduce the use of materials and reduce costs while maintaining good strength and stiffness. This lightweight honeycomb paperboard plays a key role in improving the overall fuel efficiency of aircraft and reducing operating costs. Due to its excellent mechanical properties, honeycomb paperboard can achieve lightweight structures without sacrificing performance, which is crucial for aircraft design. In addition, the use of this material reduces resource consumption in the production process, thereby improving the economic efficiency of production while meeting the dual requirements of cost and performance in the modern aviation industry.

[0014] Preferably, the four carbon tubes around the third layer of honeycomb paperboard of an aircraft dining car roof are characterized by light weight, good strength and stiffness, and they increase the stability and impact resistance of the overall structure. These carbon tubes are cleverly designed to reinforce the periphery of the honeycomb paperboard, thereby effectively dispersing stress and preventing deformation or damage to the material when subjected to external forces such as vibration and impact. In addition, the lightweight characteristics of the carbon tubes help to reduce the weight of the overall dining car roof, thereby reducing the fuel consumption of the aircraft and improving fuel efficiency. This innovative structural design makes the aircraft dining car roof not only superior in performance, but also outstanding in environmental protection and economic efficiency.

[0015] Preferably, a foam glue used to connect the four carbon tubes around the third layer of honeycomb paperboard is characterized by its own expansion characteristics, which can fill and adapt to the tiny gaps between the carbon tubes and the honeycomb paperboard when applied. This foam glue expands slightly during the curing process, ensuring a tight and uniform bonding between the carbon tubes and the honeycomb paperboard, thereby providing enhanced structural support and excellent cushioning capacity. Its foam-like structure effectively absorbs vibrations and shocks during flight, reducing stress on the top plate. In addition, the temperature resistance and chemical resistance of the foam glue ensure its stable performance under various environmental conditions, while its environmentally friendly characteristics ensure the sustainable use of the top plate without increasing the environmental burden.

[0016] (III) Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. Lightweight: Compared with traditional materials, the carbon skin used in the present invention significantly reduces the overall weight while maintaining high strength and excellent durability. This lightweight property is particularly important for weight-sensitive applications such as aircraft, as it helps improve fuel efficiency, reduce operating costs, and may improve performance and load capacity. In addition, the use of lightweight materials also helps reduce stress and fatigue in the overall structure, thereby extending the service life of the product and improving safety.

[0018] 2. Toughness: Since this composite material is mainly composed of carbon fiber, it exhibits excellent toughness and elasticity. This material can bend under the action of the load without breaking easily, which greatly enhances the durability of the top plate in the face of impact and pressure. In addition, this characteristic of carbon fiber helps to reduce the risk of damage to the top plate in daily use, especially during frequent opening and closing or transportation, and can effectively resist breakage and deformation.

[0019] 3. High strength: The composite material of the present invention provides excellent high-strength performance by combining the advantages of an almost all-carbon fiber structure with honeycomb paperboard. The carbon fiber provides a solid support for the top plate, while the unique structure of the honeycomb paperboard increases the compression resistance and lightness, allowing the top plate to carry more items without losing its shape. This high-strength design ensures that the items in the dining car can be placed in an orderly manner and firmly fixed, and are not easily confused or shifted even during a bumpy flight.

[0020] 4. Stability: In the design of the aircraft dining car roof, the third layer of honeycomb paperboard is reinforced by four carbon tubes, which enhances the overall structural stability. At the same time, the connection between the carbon tubes and the connectors uses a special foam glue, which can not only fill the tiny gaps during the curing process and enhance the sealing of the connection, but also provide additional shock and impact resistance due to its unique viscosity and expansion properties. This design greatly improves the overall stability of the aircraft dining car roof, ensuring that the structure remains firm and intact under vibration and other mechanical stresses during flight, thereby improving safety and durability.

[0021] 5. Environmental protection: The composite material of the present invention performs well in environmental protection, especially compared with traditional plastic materials. The structure of carbon fiber and honeycomb paperboard not only ensures the performance of the top panel, but also supports higher environmental protection standards. This material is easy to recycle and biodegrade, significantly reducing the impact on the environment. In the aviation industry, this environmental advantage is particularly important because it helps to reduce the overall carbon footprint of the aircraft and meets the needs of sustainable development. In addition, connecting materials such as foam are also carefully selected to ensure the environmental protection of the overall design, making the composite material easier to handle and reuse at the end of its life cycle. This environmental protection and sustainability feature not only enhances the market competitiveness of the product, but also reflects the assumption of future environmental responsibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will describe the embodiments.

[0023] Or a brief introduction to the drawings required for the description of the prior art

[0024] Figure 1 Composite plate diagram.

[0025] Figure 2 A cross-sectional view of a composite plate.

[0026] Figure 3 This is a top view of the third layer of the composite plate.

[0027] Figure 1 Middle: 1, 7, upper and lower surface carbon skin, 2, honeycomb, 3, 6, adhesive film, 4, connecting parts.

[0028] Figure 2 Middle: 1,7, carbon skin, 103,5, carbon tube, 3,6, adhesive film.

[0029] Figure 3 Medium: 101, 103, 105, 5, carbon tube, 4, 102, 104, 106, foam connector, 2, honeycomb DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to fully and clearly describe the technical solution of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1 The present invention shows a cross-sectional view of a composite material for the top panel of an aircraft dining car. The composite material structure is carefully designed to achieve the goals of high strength, high impact resistance and light weight. The outermost and innermost layers of the composite material are both carbon skins, which provide a hard outer shell to protect the internal structure from external impact.

[0032] There are two layers of highly viscous adhesive film between the carbon skins, and a honeycomb paperboard layer at the core. As an adhesive layer, the adhesive film not only connects the various layers, but also provides a certain shock-proof and energy-absorbing function. When an impact occurs, the adhesive film layer can partially absorb and disperse the impact force, reducing the direct impact on the core honeycomb structure. The honeycomb structure, due to its unique geometric shape, provides excellent impact and compression resistance. Even under the impact of heavy objects, it can maintain its shape and disperse pressure to avoid damage between material layers.

[0033] like Figure 2 As shown in the figure, the honeycomb paperboard of the third layer in the composite material is tightly wrapped by four carbon tubes and tightly connected to the honeycomb paperboard through the adhesive film. The connection between the carbon tubes is achieved by connectors and foam glue. This design not only strengthens the overall structure but also provides necessary support. The carbon tubes are designed not only as reinforcing ribs, but also provide additional strength and stability when bearing upper loads.

[0034] The adhesive is selected based on its excellent adhesion, especially to carbon fiber, and its excellent tolerance to temperature and pressure changes, ensuring that the structural integrity is maintained under various flight conditions. In addition, these carbon tubes can work in conjunction with the honeycomb paperboard when impacted, using the high elastic modulus to quickly recover to its original state, thereby reducing the dents or damage that may be caused by the impact and maintaining the integrity of the top plate. Through this carefully designed structure, the aircraft dining car top plate of the present invention significantly improves its impact resistance and long-term durability in harsh flight environments while maintaining its lightweight.

[0035] The carbon skin has excellent mechanical properties and chemical resistance, which enables it to perform well in a variety of environmental conditions. It has strong molding ability and can maintain a stable shape in complex designs. At the same time, it shows good compatibility with other materials and provides a strong outer layer protection for the composite material.

[0036] The adhesive film has excellent bonding performance and good chemical resistance and aging resistance. This adhesive film is easy to recycle and biodegrade, and is environmentally friendly. It has good bonding strength, which can ensure a firm connection between the layers and shock absorption performance.

[0037] The honeycomb paperboard stands out for its excellent mechanical properties and chemical resistance, and is suitable for high-performance application scenarios. Its honeycomb structure optimizes the overall lightweight design while ensuring good compatibility with other materials. The shape and arrangement of the honeycomb paperboard are specially designed to maximize its mechanical properties and provide excellent compression resistance and shock absorption effects.

[0038] The four carbon tubes provide excellent mechanical properties and chemical resistance while maintaining light weight, and are suitable for use in a variety of environmental conditions. These carbon tubes are easy to shape and have good compatibility with other components in the composite material, enhancing the stability and durability of the overall structure.

[0039] The foam adhesive exhibits strong bonding capabilities during the connection and curing process, adapting to a variety of application requirements. Its unique expansion characteristics help improve the sealing and overall stability of the structure. The chemical resistance and aging resistance of the foam adhesive make it a long-lasting and reliable bonding solution.

[0040] When dealing with impact, the composite material of the present invention achieves the dispersion and offset of impact through its unique multi-layer structure. When external impact acts on the dining car roof, the outer carbon skin first bears and disperses part of the impact. This high-performance carbon fiber material can effectively absorb and disperse impact energy due to its high elastic modulus and strength.

[0041] The film layer sandwiched between the carbon skin layers plays a further impact absorption role. Its viscosity and shock-absorbing properties can reduce the degree of impact transmission to the internal structure. The core honeycomb paperboard layer provides excellent impact resistance due to its unique geometric structure. Its honeycomb shape can withstand pressure without deformation when an impact occurs, effectively dispersing and absorbing the remaining impact force.

[0042] The carbon tubes around the honeycomb paperboard not only enhance the overall structural stability of the top plate, but also provide additional support for the honeycomb paperboard when subjected to impact. The foamed rubber connection between these carbon tubes and the honeycomb paperboard can provide additional cushioning effect during impact due to its expansion characteristics, further reducing the impact of the impact on the internal structure. Through this comprehensive design, the composite material of the present invention can effectively disperse and absorb impact force when subjected to impact, protect the dining car top plate from damage, and improve its safety and durability in harsh flight environments.

[0043] What is disclosed above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or deformations within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite material for the roof of a civil aircraft dining car, characterized in that: The composite material comprises: the first and fifth layers are carbon skins (1, 7), which are the outermost and innermost layers of the composite material and provide a solid protective shell; the second and fourth layers are adhesive films (3, 6), which are located between carbon plates and play a bonding role and have a shock-absorbing function; a honeycomb paperboard layer (2) located at the core of the composite material and provides excellent impact resistance and compression resistance; four carbon tubes (5, 101, 103, 105), which are distributed around the honeycomb paperboard and enhance the overall structural strength of the composite material; and a foam adhesive connector (4, 102, 104, 106) used to tightly combine the carbon tubes with the honeycomb paperboard and enhance the stability and impact resistance of the composite material; The honeycomb paperboard layer (2) is tightly wrapped by four carbon tubes (5, 101, 103, 105) on all sides and connected by foam glue connecting pieces (4, 102, 104, 106); the use of foam glue provides two advantages: firstly, its expansion property ensures that the gap between the carbon tubes and the connecting pieces is effectively filled during the curing process, thereby improving the overall stability and sealing of the structure; secondly, the viscosity of the foam glue ensures that the connection between the carbon tubes remains firm even under extreme temperature and pressure conditions, preventing the structure from loosening or breaking; The carbon tubes (5, 101, 103, 105) are connected to each other via corresponding inclined surfaces, and the foam adhesive connection piece (4, 102, 104, 106) is located at the connection between two adjacent carbon tubes (5, 101, 103, 105).

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