Baffle Carrier Anti-Return Device for Foam Expansion Control
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Solution Overview
Problem
Existing baffle systems for automotive and aerospace applications face challenges in sealing cavities effectively, preventing foam contamination of trim holes, and controlling foam expansion, leading to incomplete sealing and material loss during the injection of thermally expandable materials.
Innovation Solution
A baffle system featuring a rigid, flat carrier with a fixation mechanism that includes an anti-return device to prevent foam escape, allowing for precise expansion and sealing within cavities while maintaining structural support and directing foam to critical areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bulk foamable material is injected into the cavity, then the cavity can be filled and sealed, but the material flows in large sections with incomplete sealing and may escape through trim holes
Solution Approach 1:
The invention introduces a carrier with multiple fixation mechanisms that divide and contain the expandable material in specific sections or zones within the cavity. This segmentation prevents the material from flowing freely in large uncontrolled sections, ensuring complete sealing while maintaining ease of operation through localized containment.
Solution Approach 2:
The carrier acts as an intermediary structure between the injectable expandable material and the cavity walls. It provides a framework that guides and controls the material expansion, preventing uncontrolled flow and escape while ensuring complete cavity sealing.
2Strength
If the carrier is made rigid and flat for structural support, then structural reinforcement is improved, but the fixation mechanism complexity increases
Solution Approach 1:
The invention merges the carrier structure with the fixation mechanism by integrating multiple fixation points directly onto the rigid flat carrier. This combination maintains the structural reinforcement benefits of the rigid carrier while reducing overall device complexity through functional integration rather than separate components.
Solution Approach 2:
The rigid flat carrier serves multiple functions simultaneously: it provides structural reinforcement, supports the fixation mechanisms, and acts as a containment framework for the expandable material. This multi-functionality reduces the need for additional separate components, thereby reducing device complexity while maintaining strength.
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
The solution ensures complete cavity sealing, prevents foam contamination of trim holes, and minimizes foam loss during expansion, providing effective acoustic dampening and structural reinforcement.
Implementation Method 1
When inserted into the cavity and by the action of the heat applied in electrophoresis baking, the baffle material expands to seal the cavity and or bond the carrier to the member
Implementation Method 2
an anti-return device that is configured to prevent at least a portion of the expandable material from escaping through the opening during expansion
Data Source
Figure 1
Figure 2~3
Figure 4A~4C
AI summary
A baffle or reinforcer (100) includes a carrier (105) configured to be disposed in a cavity (110) and a fixation mechanism (115) disposed on the carrier (105) and configured to at least partially support the carrier (105) in the cavity (110). The fixation mechanism (115) defines an opening (140) for receiving an expandable material (185). The fixation mechanism (115) has an anti-return device (160) configured to prevent at least a portion of the expandable material (185) from escaping through the opening (140) during expansion. A method includes inserting the carrier (105) into the cavity (110), injecting the expandable material (185) into the cavity (110) via the opening (140) in the fixation mechanism (115), expanding the expandable material (185) within the cavity (110), and preventing at least a portion of the expandable material (185) from escaping through the opening (140) during expansion.