Composite Curing Container for Autoclave-Free Pressure Curing
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Solution Overview
Problem
The use of industrial autoclaves for curing composite materials leads to bottlenecks in manufacturing due to throughput dependency and the need for extensive floor space and high energy consumption, as well as the requirement for transporting materials to and from the autoclave.
Innovation Solution
A system utilizing a constraining container with an expandable medium that applies pressure for curing composite structures, allowing for controlled heating and pressure application without the need for large autoclaves, enabling localized or full-scale curing outside traditional manufacturing environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If industrial autoclaves are used for curing composite materials, then curing can be performed under controlled temperature and pressure, but manufacturing throughput is limited and floor space requirements increase
Solution Approach 1:
The patent divides the curing process into multiple stages: preliminary curing in a conventional oven (first stage) followed by final curing in an autoclave (second stage). This segmentation allows most materials to be cured outside the autoclave, reducing the workload on autoclaves and increasing overall manufacturing throughput while maintaining quality through controlled multi-stage processing.
Solution Approach 2:
The patent applies preliminary curing in a conventional oven before final autoclave curing. This preliminary action completes the majority of the curing process under less restrictive conditions, reducing the time and space requirements for the final autoclave operation and thereby increasing manufacturing productivity.
2Reliability
If industrial autoclaves are used for curing composite materials, then proper pressure and temperature control is achieved, but energy consumption increases
Solution Approach 1:
The curing process is segmented into two stages: initial curing in a conventional oven consuming less energy, and final curing in an autoclave consuming more energy but for a shorter duration. This segmentation significantly reduces total energy consumption compared to continuous autoclave curing, as most of the curing process occurs at lower energy input levels.
Solution Approach 2:
Preliminary curing in a conventional oven performs the energy-intensive heating and pressure application before the final autoclave stage, allowing the autoclave to operate more efficiently for a shorter period, thereby reducing overall energy consumption while maintaining curing quality.
3Reliability
If industrial autoclaves are used for curing composite materials, then complete curing is achieved, but transportation requirements increase
Solution Approach 1:
The curing process is divided into on-site preliminary curing in a conventional oven and final curing in an autoclave. This segmentation allows materials to be cured partially at the point of use or in a simpler location, reducing the need for complex transportation of large uncured composite structures to and from large autoclaves.
Solution Approach 2:
Preliminary curing is performed at the location where the composite material is needed, completing the majority of the curing process before final autoclave treatment. This reduces the size and weight of materials that need to be transported, thereby reducing transportation requirements and complexity.
4Productivity
If autoclave capacity is increased to improve throughput, then more materials can be cured simultaneously, but floor space requirements increase
Solution Approach 1:
By segmenting the curing process into two stages with most curing occurring outside the autoclave, the patent reduces the required autoclave capacity and footprint. Multiple materials can be processed in parallel in the conventional oven while the autoclave handles only the final curing stage, increasing effective throughput without proportionally increasing floor space requirements.
Solution Approach 2:
Preliminary curing in a conventional oven allows multiple materials to be processed simultaneously in a space-efficient manner before final autoclave treatment. This preliminary action increases overall manufacturing throughput while requiring minimal autoclave capacity, thereby reducing floor space requirements.
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 system reduces the reliance on autoclaves, improves factory layout, lowers energy consumption, and facilitates faster, cheaper, and more flexible curing processes, including repair and secondary curing without re-entry into autoclaves.
Implementation Method 1
The expandable medium is configured to expand when a predetermined change is produced in an attribute of the expandable medium such that the expandable medium applies positive pressure to the composite structure and the cover of the constraining container
Implementation Method 2
The system may further comprise a heater in thermal communication with the expandable medium, preferably wherein the heater is configured to be disposed within the interior volume of the constraining container with the expandable medium
Data Source
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AI summary
A composite curing system includes system includes a constraining container and an expandable medium. The constraining container includes a base and a cover and has an interior volume. The constraining container is configured to enclose at least a portion of a composite structure. The expandable medium configured to be disposed within the interior volume between at least a portion of the constraining container and the composite structure. The interior volume of the constraining container is selectively variable.