Modular Autoclave for Composite Preform Curing
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Solution Overview
Problem
Large-scale autoclaves used for processing composite materials like Carbon Fiber Reinforced Polymer (CFRP) components are energy-intensive, costly, and hinder efficient manufacturing processes due to their large thermal mass, high energy consumption, and the need for significant gas usage, which complicates continuous processing and assembly line operations.
Innovation Solution
The development of autoclaves with inner surfaces that match the contours of specific preforms, allowing for the formation of a pressure chamber with reduced volume and thermal mass, enabling efficient heating and cooling, and the use of layup mandrels and caul plates to apply heat and pressure uniformly, reducing gas usage and cycle time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If large scale autoclaves are used to accommodate a wide range of component geometries, then versatility is improved, but energy consumption increases significantly
Solution Approach 1:
The autoclave system is divided into multiple smaller, modular autoclave units rather than using one large autoclave. Each module can independently process specific component geometries, reducing the thermal mass and energy required for each processing cycle while maintaining overall system versatility through parallel operation of multiple modules.
Solution Approach 2:
The autoclave modules are designed to be dynamically configurable and repositionable along the production line. This allows the system to adapt to different component geometries by reconfiguring which modules are active and how they are arranged, rather than requiring a single large static autoclave that must accommodate all geometries simultaneously.
2Productivity
If large scale autoclaves are used to process composite components, then processing capability is improved, but heating time and cycle time increase
Solution Approach 1:
By segmenting the processing system into multiple smaller autoclave modules, each module has reduced thermal mass compared to a single large autoclave. This allows faster heating and cooling cycles while maintaining overall processing capability through parallel operation of multiple modules, thereby reducing total cycle time.
Solution Approach 2:
Multiple autoclave modules operate in parallel and can be arranged in a continuous production line configuration. While one module is heating, another can be pressurizing, and a third can be cooling or preparing for the next cycle. This continuous overlapping of processing stages eliminates idle time and maintains constant productivity without requiring excessively long individual cycle times.
3Reliability
If large scale autoclaves are installed on dedicated foundation, then processing stability is improved, but factory floor space efficiency deteriorates
Solution Approach 1:
The system uses multiple smaller autoclave modules instead of one large autoclave requiring a dedicated foundation. These modules can be installed on standard factory flooring and arranged in flexible configurations, significantly reducing the footprint and eliminating the need for specialized foundation construction while maintaining processing stability through modular design.
Solution Approach 2:
The autoclave modules are designed to be mobile and reconfigurable rather than fixed to dedicated foundations. This allows them to be easily repositioned, rearranged, or scaled along the production line according to manufacturing needs, maximizing factory floor space utilization while maintaining processing reliability through consistent modular architecture.
4Device complexity
If centralized autoclave processing is used, then equipment cost is reduced, but manufacturing efficiency deteriorates
Solution Approach 1:
Rather than using one large centralized autoclave, the system employs multiple smaller autoclave modules distributed along the production line. Each module is simpler and less expensive individually, but their collective processing capability exceeds that of a single centralized unit. The distributed configuration allows components to be processed in-line without centralized bottlenecks, improving manufacturing efficiency while keeping individual equipment costs manageable.
Solution Approach 2:
The system transitions from a single-point centralized autoclave to a distributed linear arrangement of modules along the production line. This spatial redistribution eliminates the bottleneck effect of centralized processing and allows continuous flow of components through parallel processing stages, thereby improving manufacturing efficiency without requiring proportionally higher equipment investment.
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 approach reduces energy consumption, minimizes material costs, and enhances manufacturing efficiency by allowing for continuous processing and faster cycle times, enabling the production of composite parts with improved throughput and reduced operational expenses.
Implementation Method 1
The autoclave is then heated to cure the resin
Implementation Method 2
The autoclave is then sealed and evacuated, causing the diaphragm to compress the resin layer against its core or mandrel due to atmospheric or higher pressure in the compression chamber
Implementation Method 3
The autoclave is then sealed and evacuated
Data Source
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AI summary
The application relates to an apparatus and method in relation to an in-line autoclave adapted to perform geometry. The method includes driving (902) a layup mandrel (120) in a process direction (179) into an autoclave (180), forming (904) the pressure chamber (187) having boundaries defined by the layup mandrel (120), the autoclave (180) and perimeter seals (150), hardening (906) a preform (170) at the layup mandrel (120) into a composite part (714) and removing (908) the layup mandrel (120).