At present, the proportion of domestic rail transit vehicles using glass fiber reinforced plastic is not very high. It is now mainly used in interior components of rail transit vehicles, and is used in a small range in car bodies and bogies. There is a large potential market development space. The following mainly introduces the application of FRP material in the interior decoration of rail transit vehicles.
The interior decoration of rail transit vehicles is a place where a lot of glass fiber reinforced plastic materials are used, such as the hood of the driver's cab, passenger seats, side wall panels, air conditioning ducts and other structures can be made of glass fiber reinforced plastic materials. However, the interior decoration uses a glass fiber reinforced plastic structure that is not entirely composed of fiberglass and resin, but uses a sandwich structure in it. This is to achieve certain strength and rigidity design requirements.
The composite sandwich structure is composed of five parts from top to bottom, which are the structure of glass fiber reinforced plastic, adhesive layer, foam (aluminum honeycomb), adhesive layer, and glass steel. In addition, a layer of gel coat with a thickness of about 1 mm will be added on the surface of the FRP panel relative to the FRP panel on the other side of the foam. This is to make the surface smoother and more beautiful, which is more conducive to painting operations.
The reinforced material of the new FRP panel can adopt various types such as fiber cloth, fiber felt and prepreg, which are synthesized by different layers, and its mechanical properties are related to the fiber laying angle and will produce different effects. In addition, when choosing different resins and fillers, they also have great differences in flame retardancy, heat insulation, sound insulation and paint performance. Therefore, the use of new fiberglass materials can greatly improve the designability of rail transit vehicle components.
※ The glass fiber reinforced plastic material is used in the cab hood
The FRP material has good plasticity, and can be designed into different shapes according to the requirements of the vehicle model and the user. It is not limited by the width during the production process. It can also be embedded with wooden beams or steel beams as needed to increase the strength of the FRP product. After molding the molded FRP products, the imported gel coat is sprayed on the surface, and then polyester paint is sprayed to improve the surface decoration effect. In addition, the glass fiber reinforced plastic cab hood can maintain the structure without deformation at a high temperature of 420 ℃. Once the vehicle fires in the tunnel, it can provide favorable conditions for passengers to escape; and the design thickness of the fiberglass cab hood can be less than 3.2mm , Can effectively reduce the weight of the vehicle.
※ FRP material application passenger seat
The seats made of glass fiber reinforced plastic have the characteristics of high strength, light weight, aging resistance, long life, and maintenance-free. No harmful gases are released at room temperature. The smoke is low when burned at high temperature and no toxic gases are generated, which is conducive to escape.
※ The glass fiber reinforced plastic material is used in the operating platform of the cab
The driver's cab operating table is mainly composed of the table frame and the under-frame frame. In order to facilitate the driver's operation, it needs to have good fluidity, and the space of the operating table is relatively small, and it needs to have good electrical insulation characteristics. FRP products It just has the characteristics of easy processing, convenient repair in the later period, and excellent insulation performance, so it is very suitable for application in the cab operator's console.
※ FRP material is applied to the side wall panel of the passenger room
The thickness of the FRP side wall panel is generally 4mm. The back circumference of the FRP side wall and the embedded plastic strips or aluminum beams around the window form an integral module. It has good airtightness, and it is easy to implement modular installation. It is helpful for leveling the car wall and making the passenger room. The overall appearance is elegant. The FRP side wall board has high strength, good wear resistance, and is not easy to produce scratches and scratches. In case of such problems, it can be easily repaired by spraying, painting and other technical means.
※ FRP material is used in air conditioning duct
The air-conditioning duct is a thin-walled cylindrical structure, which requires a small thermal conductivity coefficient, low heat consumption, and good thermal insulation performance. Because FRP material has good tensile strength and bending strength, and low thermal conductivity, it is an ideal material for manufacturing air-conditioning ducts of subway vehicles. The actual situation shows that the air conditioning duct of FRP material can better prevent the heat exchange between the inside and outside of the duct, and effectively prevent the condensation of the duct.
In addition to the interior decoration of rail transit vehicles, FRP materials are also used in the body, bogies, and current receivers of rail transit vehicles.
The use of new glass fiber reinforced plastic materials can effectively reduce the quality of rail transit vehicles, which is conducive to saving the operating costs and maintenance costs of rail transit vehicles, and can meet the requirements of mechanical strength and stress. And the performance of heat insulation. Therefore, as a production enterprise, Yari FRP should actively study the wider application of FRP materials in rail transportation vehicles, so that it can achieve good economic and social benefits.