Composite Apron Board Manufacturing Process for High-Speed Rail
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Solution Overview
Problem
High-speed rail equipment cabin apron boards require materials that balance high strength, impact resistance, flame retardancy, and light weight to reduce energy consumption and operational resistance, which existing materials like aluminum alloys fail to adequately address.
Innovation Solution
A manufacturing 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, applied through lamination and hot pressing for the apron main plate and vacuum bagging for trim strips, to achieve enhanced performance and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If aluminum alloy materials are used for apron board, then strength and durability are ensured, but weight reduction cannot be achieved
Solution Approach 1:
The patent employs composite materials consisting of carbon fiber reinforced plastic, aramid fiber reinforced plastic, and glass fiber reinforced plastic in specific layer configurations. This composite structure achieves both weight reduction (35-40% lighter than aluminum alloy) and maintained structural strength, directly resolving the contradiction between lightweight design and bearing ability requirements.
Solution Approach 2:
The apron board is divided into multiple functional layers with different material compositions. The composite structure segments the load-bearing functions across different layers, allowing optimization of each layer's material properties to achieve both lightweight and strong performance characteristics.
2Use of energy by moving object
If light weight materials are used for apron board, then energy consumption is reduced, but impact resistance may be compromised
Solution Approach 1:
The patent incorporates aramid fiber reinforced plastic layers which provide exceptional impact resistance. The aramid fibers act as a reinforcement that absorbs impact energy, ensuring that the lightweight composite structure maintains high reliability and impact resistant ability, directly addressing the contradiction between weight reduction and impact resistance.
Solution Approach 2:
Different regions of the apron board are assigned different material compositions based on their specific functional requirements. Areas subject to impact loads receive aramid fiber reinforced plastic layers, while other areas use carbon fiber or glass fiber reinforced plastic, optimizing both weight and impact resistance locally where needed.
3Object-affected harmful factors
If flame retardant materials are used for apron board, then safety is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses flame retardant prepreg materials that inherently possess flame retardant properties. The flame retardant functionality is integrated into the material composition itself rather than being added as a separate layer or coating, simplifying the manufacturing process while ensuring safety requirements are met.
Solution Approach 2:
The manufacturing process controls parameters such as temperature (130-150°C), pressure (4-6 MPa), and curing time (3600-3800 seconds) to optimize the flame retardant properties of the composite material. By carefully controlling these parameters, the flame retardant ability is enhanced without significantly increasing manufacturing complexity.
4Strength
If multiple layers of composite materials are laminated, then strength and performance are enhanced, but manufacturing time increases
Solution Approach 1:
The patent employs preliminary action by pre-preparing the composite layers and arranging them in the mold cavity before final curing. The layers are positioned and secured in advance, allowing the actual curing process to be more efficient and reducing overall manufacturing time while maintaining the multi-layer strength enhancement.
Solution Approach 2:
The patent optimizes curing parameters including temperature (130-150°C), pressure (4-6 MPa), and time (3600-3800 seconds) to achieve efficient consolidation of multiple layers. By carefully controlling these parameters, the manufacturing time is minimized while still achieving the full strength benefits of multi-layer lamination.
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 an apron board with high strength, impact resistance, and a weight reduction of 35-40% compared to aluminum alloy boards, 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 apron 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
vacuum bagging for trim strips
Data Source
AI summary
A process for manufacturing an apron board of a high-speed rail equipment cabin using a composite material is disclosed. The material includes aramid fiber 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/m2 single component medium temperature curing blue epoxy adhesive. The process includes manufacturing an apron main plate (3); manufacturing apron-board trim strips (1, 2), wherein there are two apron-board trim strips (1) and two apron-board trim strips (2); and obtaining the apron board through the apron main plate (3) and the apron-board trim strips (1, 2), wherein the two apron-board trim strips (1) are respectively stuck at two opposite sides of the apron main plate (3), the two apron-board trim strips (2) are respectively stuck at another two opposite sides of the apron main plate (3).