Segmented Mounting Mat for Pollution Control Wrapping
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Solution Overview
Problem
Existing mounting mats for pollution control elements in gas processing devices are prone to cracking or buckling during wrapping, especially when used in automated processes, leading to handling issues and potential leakage, as they lack secure fastening mechanisms to prevent separation and movement during handling and wrapping.
Innovation Solution
A mounting mat design featuring at least two sheets held together by holding means that allow parallel movement, such as threads, bands, or adhesive zones, to prevent separation and buckling, while a fixation means restricts movement perpendicular to the sheets, ensuring stability during handling and wrapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single mat is used to wrap around the pollution control element, then the mounting process is simple, but the mat cracks or buckles during wrapping due to inadequate flexibility and movement freedom
Solution Approach 1:
The mounting mat is divided into multiple separate sheets instead of using a single mat. Each sheet can move and deform independently during the wrapping process, preventing cracking and buckling while maintaining structural integrity. The sheets are held together by holding means that allow parallel movement between sheets.
2Reliability
If two sheets are bonded together at the center to form a laminate, then cracking and buckling are reduced, but the sheets cannot move relative to each other during wrapping, causing handling problems in automated processes
Solution Approach 1:
The holding means are designed to be dynamic rather than rigid, allowing the sheets to move parallel to each other during wrapping. This dynamic capability enables the mat to adapt to the wrapping process while still preventing cracking and buckling by keeping sheets together.
Solution Approach 2:
The holding means change their constraint parameters based on the process stage: during wrapping, they allow parallel movement between sheets, but during handling, they prevent separation. This parameter change enables both reliable wrapping and easy automated handling.
3Ease of operation
If holding means allow parallel movement between sheets, then wrapping flexibility is improved, but the sheets may separate perpendicular to the sheets during handling
Solution Approach 1:
The holding means provide different qualities of connection in different directions: they allow parallel movement between sheets for wrapping flexibility, but prevent perpendicular separation for handling stability. This local quality differentiation resolves the contradiction between flexibility and stability.
Data Source
AI summary
A mounting mat for a pollution control device is disclosed. The device comprises at least a first sheet and a second sheet and at least one holding means for holding the at least first and second sheets together. The holding means are adapted to (i) hold the at least first and second sheets together while allowing movement of the at least first and second sheets parallel to each other in the region where the holding means is positioned; and/or (ii) to break upon wrapping around a body thereby allowing movement of the at least first and second sheets parallel to each other in the region where the holding means is positioned. A pollution control device containing such a mat and method of making a pollution control device containing such a mat are also disclosed.