Composite Base Board for High-Speed Rail Cabin
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Solution Overview
Problem
The manufacturing of high-speed rail equipment cabin base boards requires materials that balance high strength, light weight, flame retardancy, and impact resistance, while reducing energy consumption by minimizing train resistance.
Innovation Solution
A process using a composite material comprising aramid fiber honeycomb, PET foam, 3K twill carbon fiber flame retardant prepreg, unidirectional carbon fiber flame retardant prepreg, glass fiber flame retardant prepreg, and medium temperature curing blue epoxy adhesive, with specific lamination and molding techniques to create a base board with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If aluminum alloy materials are used for base board, then strength is ensured, but weight is excessive
Solution Approach 1:
The patent applies composite materials consisting of carbon fiber prepreg, glass fiber prepreg, aramid fiber prepreg, and honeycomb structure instead of traditional aluminum alloy. This composite structure achieves high strength-to-weight ratio, reducing base board weight by 35-40% while maintaining or improving mechanical properties including strength, stiffness, and impact resistance.
2Weight of moving object
If composite materials are used to reduce weight, then light weight performance is improved, but manufacturing complexity increases
Solution Approach 1:
The base board is divided into multiple functional layers including carbon fiber prepreg layers for strength, glass fiber prepreg layers for dimensional stability, aramid fiber prepreg layers for impact resistance, and honeycomb core for lightweight structural support. This segmentation allows each layer to contribute specific properties while enabling modular manufacturing and assembly.
Solution Approach 2:
The patent specifies precise parameters for each layer including areal weight (e.g., 200 g/m2 for carbon fiber prepreg, 300 g/m2 for glass fiber prepreg), layer sequence, and honeycomb core thickness (16.5 mm). These controlled parameters ensure consistent manufacturing quality and performance while managing complexity through standardization.
3Reliability
If multiple layers of different materials are laminated, then comprehensive performance is enhanced, but manufacturing time increases
Solution Approach 1:
The patent employs prepreg (pre-impregnated) materials where fibers are pre-saturated with resin before lamination. This preliminary preparation eliminates the need for separate resin application and distribution steps during manufacturing, reducing production time while ensuring uniform material properties and consistent quality across all layers.
Solution Approach 2:
Multiple functional requirements are merged into a single integrated base board structure. The carbon fiber, glass fiber, aramid fiber, and honeycomb core are combined in one lamination process to simultaneously achieve strength, stiffness, dimensional stability, impact resistance, and lightweight properties, rather than requiring separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process results in a base board with high strength and impact resistance, significantly reducing weight by 35-40% compared to aluminum alloy materials, offering improved performance and energy efficiency.
Implementation Method 1
300 g/m2 single component medium temperature curing blue epoxy adhesive
Implementation Method 2
shaping the base-board main plate through a hot press machine with a temperature of 130-150° C., a molding time of 3600-3800 s and a pressure of 4 MPa-6 MPa
Implementation Method 3
shaping through vacuum bagging with a temperature of 130-150° C. and a molding time of 4500-4800 s
Data Source
AI summary
A process for manufacturing a base board of a high-speed rail equipment cabin using a composite material is disclosed. The composite material includes: aramid honeycomb, PET foam, 3K twill carbon fiber flame retardant prepreg, unidirectional carbon fiber flame retardant prepreg, glass fiber flame retardant prepreg, aramid flame retardant prepreg, and 300 g/cm2 single component medium temperature curing blue epoxy adhesive. The process includes manufacturing a base-board main plate (1), a base-board handle (2) and two base-board sliders (3). While installation, the base-board handle (2) is stuck to one side of the base-board main plate (1), and the two base-board sliders (3) are respectively stuck to another two opposite sides of the base-board main plate (1). The weight of the base board made from the composite material is 35%-40% lower than the base board made from the aluminum alloy material, which leads to a good prospect of application.