Fiber-Reinforced Plastic Concave Section Production
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Solution Overview
Problem
Current methods for producing fibre-reinforced plastic components with concave sections are time-consuming and lack reproducibility, as they require laborious fibre placement and are prone to reinforcement slippage due to resin impregnation.
Innovation Solution
A method involving fixing reinforcements on a positive core, winding fibres around the core to span concave regions, pressing the fibres into a negative mould, and curing with cross-linking plastic, which prevents slippage and ensures reproducible quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If fibres are wound around a positive core and then dabbed or tamped into concave regions with resin impregnated brush, then concave sections can be produced, but the process becomes extremely time-consuming and arduous
Solution Approach 1:
The invention applies preliminary action by pre-fixing the reinforcement elements to the positive core in the desired positions before fibre winding. This preparation eliminates the need for subsequent time-consuming dabbing or tamping operations, as the reinforcement is already in its final position. The reinforcement elements are secured with adhesive or mechanical fixation methods beforehand, allowing the fibre winding process to proceed efficiently without interruptions for manual adjustment.
Solution Approach 2:
The invention extracts the problematic dabbing or tamping step from the production process by pre-positioning the reinforcement elements. By removing this manual intervention step, the process becomes more automated and efficient. The reinforcement is integrated into the positive core structure before fibre winding begins, eliminating the need for separate operations to place reinforcement in concave regions.
2Adaptability or versatility
If reinforcements are incorporated as resin impregnated fibres are wound around the positive core, then reinforcements can be added, but it becomes very laborious to bring the reinforcements into the correct position due to resin promoting slipping
Solution Approach 1:
The invention applies preliminary action by fixing the reinforcement elements to the positive core before the fibre winding process begins. The reinforcement is positioned and secured in advance using adhesive bonding or mechanical fixation methods, ensuring it remains in the correct position during subsequent processing. This pre-positioning eliminates the problem of reinforcement slippage that occurs when trying to place reinforcement during resin-impregnated fibre winding.
Solution Approach 2:
The invention segments the production process into distinct stages: first fixing the reinforcement to the positive core, then winding the fibres around the prepared assembly. This separation of operations allows each step to be optimized independently - the reinforcement can be precisely positioned and secured before the fibre winding begins, avoiding the complications of trying to simultaneously manage both reinforcement placement and fibre winding.
3Shape
If manual dabbing or tamping of fibres into concave regions is performed, then fibre placement can be achieved, but the process lacks reproducibility and constant quality
Solution Approach 1:
The invention applies preliminary action by pre-fixing the reinforcement elements to the positive core in precise, predetermined positions before fibre winding. This preparation ensures that the reinforcement is already in its final, correct position, eliminating the need for manual dabbing or tamping operations that vary between operators and produce inconsistent results. The pre-positioned reinforcement provides a stable foundation for subsequent fibre winding, ensuring reproducible quality.
Solution Approach 2:
The invention applies self-service by designing the positive core with integrated reinforcement fixation capabilities. The reinforcement elements are automatically held in their correct positions through adhesive bonding or mechanical features built into the positive core structure, eliminating the need for manual intervention during fibre placement. This self-positioning system ensures consistent, reproducible results without relying on operator skill or manual dabbing techniques.
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 method enables efficient and reproducible production of plastic components with concave sections by preventing reinforcement slippage and eliminating the need for arduous fibre placement, resulting in a logical and high-quality manufacturing process.
Implementation Method 1
curing the component in the negative mould following the introduction of a cross-linking plastic
Data Source
AI summary
A method for producing a fiber-reinforced plastic component is specified. In a first step, a positive arrangement is produced by fixing at least one reinforcement ready to be used on a positive core. In a second step, fibers are wound around the positive arrangement, concave regions of the positive arrangement that are formed by the reinforcement being spanned by the fibers. In a third step, the entire area of the fibers is pressed onto the positive arrangement in a negative mould. Finally, the component is cured in the negative mould following the introduction of a cross-linking plastic.