Welcome to the railway bulletin. This website uses cookies. Read our policy.
Sponsored by 3M 2021-08-16T07:00:00 01:00
3M Materials and Adhesives Science has changed the appearance and interior of high-speed trains (HST) by addressing speed, energy efficiency, and stability challenges, allowing manufacturers and operators to focus on improving passenger experience and comfort in new designs . With a complete portfolio of innovative adhesives and tapes, and years of application engineering experience in the rail market, 3M is the right partner to help you solve the design and assembly challenges in the design and manufacturing of rail vehicles.
Science Transformation Journey
The traditional long-distance bus is a solid vehicle that meets the goal of transporting passengers within a reasonable time, but now time has become one of the most valuable concepts in modern society. Many regions have seen their trains and infrastructure transformed into high-speed networks, turning distance into a balance of time, efficiency, and passenger comfort. Science and innovation have achieved this transformation in many areas, such as motors, bogies, rails, bodywork, fairings, windows, and interior trim.
In order to compete with other modes of transportation, high-speed trains need to adjust their design to achieve the best payload, energy efficiency and comfort standards: double deck or five seats per row, aerodynamic shape, fairing and body with differentiated designs , Wider interior space and windows, as well as safety and passenger experience. These all help to provide a safe and comfortable journey in a highly competitive environment, with operators competing with each other to obtain passenger preferences.
Polymer science enables high-speed trains with advanced functions such as improved stability, weight reduction, composite material manufacturing and integration, multi-material assembly, vibration reduction, heat and sound insulation, and many other functions, such as accessibility. Today, we cannot imagine aerodynamic noses or passenger car windows with visible screws, welds, or visible metal frames; polymers are not only the key to reducing air friction, but also the key to obtaining cutting-edge interior and exterior designs.
Comfort and customization through innovations in polymeric materials and adhesives
In terms of providing superior comfort, railway operators and high-speed train manufacturers must adopt innovative methods such as "design thinking" and "technical observation" to meet the needs and expectations of passengers. Operators and manufacturers take the passenger as the center, take the passenger as the center, customize the train design, integrate the silent car and the buffet car, and provide convenient services such as connectivity, privacy, thermal and acoustic comfort. The use of advanced assembly methods such as adhesive bonding plays a key role here, enabling customized and flexible designs and providing the required performance. Adhesives and tapes provide reliable solutions to many challenges surrounding comfort, durability and safety.
3M adhesives and tape solutions and 3M railway experts help engineers develop advanced high-speed train projects. From bonding and protection of external components to internal assembly and insulation, 3M's adhesive and tape product portfolio includes the most advanced technologies on the market to meet these requirements. The cross-section shown in Figure 1 provides examples of possible application areas for 3M adhesives and tapes.
Figure 1. Examples of possible application areas for 3M adhesives and tapes
The advantages of acrylic adhesive toughness and flexibility
When toughness, impact resistance and fatigue resistance, flexibility and fast bonding are required, acrylic adhesives and tapes are one of the leading bonding technologies for multi-material bonding.
When two high-speed trains intersect at a speed of 300 km/h, whether in a tunnel or on an open track, all parts will be deformed by air pressure and suction. Safety and passenger comfort are affected by the forces that require a robust and durable assembly design. Acrylic adhesives and acrylic foam tapes play an important role in stress absorption and dissipation. The new generation of 3M structural acrylic adhesives (such as DP8407NS) provide long-term stress cycle resistance when bonding inserts, metal and composite parts, and the enhanced formulation has excellent resilience and toughness.
3M VHB Acrylic Foam Tape and 3M Dual Lock Recloseable Fasteners help to make durable wall panels, window frame covers and ceiling internal components, which have better aesthetics and vibration damping than other connection methods. In floor modules, 3M VHB tape is used to bond floor coverings, including carpets, to the floor. When operators and manufacturers expect more than 10 years of durability, it provides excellent pedaling comfort and strong adhesion. Good-especially in high-traffic areas. Compared to other floor covering assembly methods, they also allow for easy replacement of damaged floor coverings. Below the floor line, use 3M VHB acrylic foam tape to glue the floor panel to the structure, providing consistent thickness and elastic, stress-dissipating adhesion. The easy-to-use self-adhesive high-performance acrylic foam polymer helps reduce floor vibration .
Other internal components, such as toilet modules, luggage compartments, partitions and catering equipment, use 3M VHB tape to bond metal, composite, plastic and transparent panels to provide quieter, more flexible and lighter components.
The durability, excellent mechanical strength and flexural strength of epoxy adhesives
Epoxy adhesives have chemical resistance, corrosion resistance and moisture resistance. They are also one of the strongest adhesive series when structural panels such as floors or doors need to resist mechanical and bending stress. The floors and doors of high-speed trains may be subject to constant vibration, twisting, and bounce pressure. 3M epoxy adhesive SW7240B/A FR is an example of advanced epoxy technology, which has been successfully used in the rail industry for more than 20 years. This reinforced epoxy resin formula and its high modulus make the components of different materials durable over the life of the rail car, aiming to maintain the resistance of the structural panel through years of arduous use.
2K epoxy adhesive exhibits first-class performance in floor manufacturing, providing the highest bending resistance, thinner panel design and long-term resistance. Compared with plywood, honeycomb and sandwich laminate flooring bonded with 3M SW7240B/A FR epoxy resin has significant weight reduction advantages and different advantages such as extended durability, recyclability and insulation properties.
Figure 2. Comparison of floor types with different performance characteristics. Source: 3M Application Engineering
Click here to watch our on-demand webinar on internal panel bonding solutions
Lightweight is at the core of achieving the best balance between energy efficiency and passenger payload. The high-speed train strategy focuses on specific designs, but also strongly relies on the use of lighter materials. Together with the selection of appropriate adhesives, these materials must maintain the structural integrity of the vehicle and reduce the weight of the expected payload. At the same time, they must meet passenger comfort goals and safety requirements. The 3M adhesive product portfolio provides the best solutions on the market to achieve the goals of lightweight, safety and durability, and can also provide effective damping for lighter panels for specific vibration frequencies.
Figure 3. Vibration damping performance of 3M VHB acrylic foam tape and 3M Dual Lock superimposable fasteners
Click here to download the complete 3M double lock design guide
Contact 3M experts to get solutions to your design challenges
In order to maximize the benefits of high-speed trains for passengers and overcome the challenges of reducing weight, increasing space, and noise/vibration management, designers and engineers can choose from a wide range of 3M adhesive technologies that are in line with traditional Compared with the connection method, it has advantages. Designers and engineers can rely on 3M experts with many years of experience and a product portfolio with mature performance in the railway market to help them make the best choice for high-speed train projects.
Figure 4. Unique solution to the design problem, using 3M adhesive and Diab cores.
For more information on solving the assembly and design challenges of the railway market, please visit the 3M Railway Industry Solutions website.
If you need to contact 3M railway experts, please contact us.
2021-11-12T11:13:00Z sponsored by 3M
A series of daunting challenges affect all traffic in the 21st century. As demand increases, so do people’s concerns about air quality and road traffic congestion. Governments are adopting stricter energy consumption-related regulations to respond to climate change reports. Energy is turning...
2021-06-03T13:01:00Z sponsored by 3M
Like almost everything else, the railway industry is affected by global sustainable development trends-more efficient railway construction, operation and maintenance, minimizing the impact on the environment. According to the International Energy Agency (IEA), railways are already...
Sponsored by 3M, Rohit Ramdey | Global Marketing Manager-Transportation Business Solutions
Modern passengers' expectations of train travel are not just simple transportation from A to B. From aesthetics and design elements to information signs and comfort, 3M has the latest rail car interior solutions that you can use to please passengers and make them want to come back.
Website powered by Webvision Cloud