Conformable Bladder Tooling for Thermoplastic Composite Consolidation
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Solution Overview
Problem
Traditional methods are inadequate for producing complex thermoplastic composite parts due to insufficient consolidation pressure and thermal expansion issues, making it difficult to achieve aerospace-level quality.
Innovation Solution
A consolidation tool with a conformable tooling bladder that applies adjustable pressure and heat to conform thermoplastic material into complex shapes, using a removable insert and a pressure bladder to ensure precise shaping and cooling of the composite parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional clamshell molding methods are used, then manufacturing simplicity is maintained, but manufacturing precision and consolidation pressure are insufficient for complex thermoplastic composite parts
Solution Approach 1:
The patent employs a bladder-style consolidating tool that uses pneumatic or hydraulic pressure to apply consolidation force to the thermoplastic composite material. The bladder is inflated or pressurized to exert uniform consolidation pressure on the material, enabling precise shaping of complex mold line shapes that cannot be achieved with conventional mechanical molding systems.
Solution Approach 2:
The consolidating tool utilizes a flexible bladder that can conform to complex mold line shapes. This flexible membrane allows the tool to adapt to various part geometries and apply consistent consolidation pressure across irregular surfaces, overcoming the limitation of rigid conventional molds.
2Manufacturing precision
If traditional tooling systems are used, then device simplicity is maintained, but manufacturing precision for complex shapes cannot be achieved
Solution Approach 1:
The flexible bladder consolidating tool can conform to complex mold line shapes, allowing precise reproduction of intricate part geometries. The bladder's flexibility enables it to adapt to various cross-sectional configurations and maintain intimate contact with the mold cavity surfaces throughout the consolidation process.
Solution Approach 2:
The consolidating tool system allows for dynamic adjustment of consolidation pressure and bladder configuration. The tool can be adapted for different part geometries by adjusting the bladder inflation pressure and configuration, enabling the same basic tooling system to produce various complex shapes with high precision.
3Productivity
If rapid material layup is attempted with conventional methods, then productivity increases, but manufacturing precision deteriorates due to insufficient consolidation pressure
Solution Approach 1:
The pneumatic or hydraulic bladder system enables rapid consolidation of thermoplastic composite material by applying high pressure uniformly and simultaneously across the entire material surface. This allows fast processing speeds while maintaining high consolidation quality, as the pressurized bladder can quickly densify the material without the incremental pressing required by conventional mechanical systems.
4Adaptability or versatility
If thermoplastic composite parts are produced with complex mold line shapes, then product versatility increases, but manufacturing precision decreases due to thermal expansion effects
Solution Approach 1:
The patent controls thermal parameters during the consolidation process to minimize thermal expansion effects. By carefully controlling the temperature profile and consolidation pressure timing, the process compensates for thermal expansion of the thermoplastic material, maintaining dimensional accuracy even for complex part geometries.
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
Enables the production of complex thermoplastic composite parts with consistent aerospace-level quality by providing sufficient consolidation pressure and thermal management, overcoming traditional method limitations.
Implementation Method 1
consolidation pressure by a conformable tooling bladder
Implementation Method 2
consolidation pressure by a conformable tooling bladder
Implementation Method 3
apply thermoplastic material consolidation pressure by a conformable tooling bladder
Implementation Method 4
cooling of the composite parts
Data Source
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AI summary
This disclosure is directed to a thermoplastic composite material forming method and tooling used to perform the method. More specifically, this disclosure is directed to a method of fabricating large, complex thermoplastic composite part shapes with a consolidation tool having a conformable tooling bladder that heat thermoplastic material in the tool and provide thermoplastic material consolidation pressure in directions in the tool to form a part shape of thermoplastic composite material. A novel tooling concept is used to fabricate large, complex thermoplastic composite part shapes which are not easily producible using traditional methods. The tooling concept employs a consolidation tool that provides a method to apply thermoplastic material consolidation pressure by a conformable tooling bladder that provides thermoplastic material consolidation pressure in directions in the tool that are not achievable by conventional clamshell type molds where the mold parts move in substantially vertical tool opening and tool closing directions.