Removable Tool for Gas Phase Infiltration
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Solution Overview
Problem
The existing consolidation or densification techniques by chemical infiltration in the gas phase are hindered by long production cycles due to the need for loading, heating, and cooling of fibrous preforms in ovens, which limits the efficiency and productivity of the process.
Innovation Solution
A removable tool system is introduced, comprising a homogenization chamber, a reaction chamber, and a depletion chamber, separated by perforated plates, allowing for efficient gas management and enabling the oven to remain at optimal temperature and pressure conditions without the need for continuous heating and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fibrous preforms are loaded into an oven for consolidation by chemical infiltration in the gas phase, then densification or consolidation can be achieved, but the production cycle time becomes very long due to heating and cooling requirements
Solution Approach 1:
The tool is divided into three separate chambers (homogenization chamber, reaction chamber, depletion chamber) that can be independently managed. This segmentation allows the oven to maintain stable temperature while only the reaction chamber undergoes thermal cycles, significantly reducing overall production cycle time.
Solution Approach 2:
The homogenization and depletion zones are extracted from the reaction zone and integrated into the removable tool. This allows the oven to remain at optimal processing temperature continuously, while the removable tool is heated and cooled separately, eliminating the oven's heating and cooling time from the production cycle.
2Manufacturing precision
If the oven is heated and cooled for each production cycle, then consolidation operations can be performed, but the oven availability decreases and productivity is limited
Solution Approach 1:
The removable tool is pre-heated in a dedicated heating device before being inserted into the oven for consolidation. This preliminary action ensures that when the tool enters the oven, no additional heating time is required, allowing the oven to immediately begin productive consolidation operations at optimal temperature.
Solution Approach 2:
The oven maintains continuous operation at optimal temperature for consolidation, while the removable tool is heated and prepared separately in advance. This continuity eliminates idle heating and cooling cycles in the oven, maximizing its availability and productivity for actual consolidation operations.
3Manufacturing precision
If reactive gases are introduced into the oven for each cycle, then chemical infiltration can occur, but gas consumption increases and costs rise
Solution Approach 1:
Reactive gases are introduced only into the reaction chamber where they are needed for consolidation, rather than throughout the entire oven volume. This localized gas introduction reduces reactive gas consumption while maintaining infiltration quality in the target area.
Solution Approach 2:
The homogenization and depletion functions are copied into the removable tool structure, allowing precise control of gas flow paths. This ensures reactive gases are efficiently utilized in the reaction chamber without unnecessary consumption in other oven zones.
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 solution significantly reduces production cycle times, increases the availability of the oven for densification or consolidation operations, and allows for more efficient use of reactive gases, thereby enhancing productivity and reducing costs.
Implementation Method 1
The temperature and pressure in the oven are adjusted to allow the reactive gas to diffuse within the porosities of the fibrous preforms
Implementation Method 2
The reactive gas can thus form a deposition of the material constituting the matrix by decomposition of one or more constituents of the reactive gas or reaction between several constituents
Implementation Method 3
decomposition of one or more constituents of the reactive gas
Data Source
AI summary
A removable tool for consolidation or densification in the gas phase of at least one fibrous preform configured to be arranged in an oven, the removable tool including a homogenization chamber including at least one gas inlet orifice and a depletion chamber including at least one gas outlet orifice, the removable tool further including a reaction chamber arranged between the homogenization chamber and the depletion chamber and configured to receive at least one fibrous preform, the reaction chamber being separated from the homogenization chamber and the depletion chamber by perforated plates.