Near-Net Shape Short Fiber Preforms via Slurry Suction
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Solution Overview
Problem
Current manufacturing processes for fiber-reinforced composites generate significant waste and consume high energy due to the need for multiple steps to transform sheet-form composite materials into complex shapes, limiting their drapability and resulting in substantial material waste.
Innovation Solution
A slurry-based manufacturing process that creates wet preforms with near-net-shapes, which are then dried and solidified into final products with minimal additional shaping, using a porous tool with a specific surface design to draw and consolidate the composite mixture, reducing material waste and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If composite materials are transformed from sheet form into complex shapes through traditional manufacturing steps, then the final spatial form is achieved, but significant material waste and energy consumption occur
Solution Approach 1:
The composite material is pre-formed into the desired complex shape in a near-net configuration before final manufacturing. The slurry-based process allows the material to be shaped into the target geometry in advance, minimizing subsequent cutting and shaping operations that would generate waste.
Solution Approach 2:
The manufacturing process utilizes changes in material state parameters - the composite material is processed as a slurry (liquid-like) state allowing complex shape formation, then undergoes drying and consolidation to achieve the final solid form. This parameter change enables near-net shape production with minimal material loss.
2Shape
If multiple manufacturing steps are used to transform sheet-form composite materials into complex shapes, then the final spatial form is achieved, but high energy consumption and time requirements occur
Solution Approach 1:
Multiple manufacturing operations are merged into a single integrated slurry-based process. The shaping, drying, and consolidation steps are combined in one continuous operation rather than sequential steps, significantly reducing total energy consumption and manufacturing time while achieving the same complex spatial form.
Solution Approach 2:
The complex shape is preliminarily formed in the near-net configuration during the slurry pouring process itself, eliminating the need for subsequent energy-intensive cutting, bending, and shaping operations. This preliminary action reduces overall energy consumption by avoiding repeated thermal and mechanical processing.
3Ease of manufacture
If traditional sheet-form composite materials are used, then the material availability is good, but the drapability is limited and additional shaping steps are required
Solution Approach 1:
The material is transformed from a solid sheet form to a slurry state, fundamentally changing its physical parameters. This allows the material to flow and conform to complex mold geometries, achieving superior drapability and adaptability to various spatial forms while maintaining ease of manufacture through the liquid-like processing state.
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
This process significantly reduces material waste and energy consumption by producing complex shapes with minimal additional shaping, allowing for efficient incorporation of composite materials into vehicle or non-vehicle systems while maintaining high structural integrity and versatility.
Implementation Method 1
a suction pressure is applied to draw a portion of the fibrous material intermixed with a corresponding portion of the binding material in the slurry of the composite mixture onto the specific outer surface portion of the porous tool
Implementation Method 2
the wet preform attached to the specific outer surface portion of the porous tool is partially dried into a partially dried preform attached to the porous tool
Data Source
AI summary
Example approaches are disclosed for manufacturing composite or fiber reinforcement preforms. Liquid, fibrous, binding and potentially other materials are mixed into a composite mixture slurry in a slurry container. A porous tool having a specific porous outer surface portion approximating a specific exterior surface portion of a spatial shape of a final product is immersed in the slurry container. A suction pressure is applied to draw a portion of the fibrous material intermixed with a corresponding portion of the binding material in the slurry onto the specific outer surface portion. The porous tool attached with the wet preform is removed from the slurry container. The wet preform is partially dried into a partially dried preform attached to the porous tool. The partially dried preform is dried, solidified and/or consolidated and/or injected with a resin and cured into a solid composite preform of the spatial shape of the final product.