Multi-Layer Caulking Seals for Leakproof Air Duct Joints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for forming seals between air ducts and terminal units are prone to leaks due to the risk of discontinuities in the seal, particularly when overlapping caulking beads do not achieve full lateral contact, requiring high precision and additional securing measures.
Innovation Solution
A method involving the extrusion of caulking compound in multiple layers around the perimeter of air ducts and terminal units, where each layer adheres to the previous one, ensuring a continuous and flexible seal without the need for separate fastening, using compounds like Sikaflex that cure to form a firm, leakproof bond.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single layer of caulking compound is extruded to form a seal, then the application process is simple, but the seal may have discontinuities and leaks at overlapping sections
Solution Approach 1:
The seal is divided into multiple discrete layers (first layer and second layer) that are applied sequentially. Each layer is extruded as a separate bead, creating a segmented structure that eliminates the reliability issues of single-layer overlapping while maintaining manufacturing simplicity through automated multi-pass application
Solution Approach 2:
The first layer of caulking compound is applied and allowed to partially cure or stabilize before the second layer is applied. This preliminary action ensures that the base layer is ready to receive and bond with the subsequent layer, creating a reliable multi-layer seal structure without requiring complex real-time coordination
2Reliability
If multiple layers of caulking compound are extruded to ensure continuity, then the seal becomes more reliable and leakproof, but the application process becomes more complex and time-consuming
Solution Approach 1:
The caulking compound extrusion device is designed to perform multiple functions: it can extrude different layers with controlled spacing, control the bead shape and size, and ensure proper overlapping patterns. This multi-functional capability achieves reliable multi-layer sealing without requiring separate specialized equipment for each layer application
Solution Approach 2:
The seal application process maintains continuity by extruding each layer as an unbroken bead around the entire duct perimeter before moving to the next layer. This continuous action ensures no gaps or discontinuities in any layer, achieving leakproof reliability while keeping the process efficient through uninterrupted material application
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 method provides a leakproof and continuous seal that adheres firmly to the duct surfaces and between superimposed layers, eliminating the need for additional securing steps and ensuring a tight joint without discontinuities, enhancing the reliability of air duct connections.
Implementation Method 1
the caulking compound adheres firmly to the surface thereunder. In the same fashion, also the superimposed layers of the seal adhere to each other as the caulking compound is cured
Data Source
Figure 1~3
AI summary
A method is disclosed for forming a seal between air ducts and/or terminal units thereof, the method comprising the step of extruding a caulking compound about the perimeter of the air duct to form a continuous seal (4). The invention is implemented by way of extruding the caulking compound by at least two layers so that a second layer (4') is extruded radially over the first layer (4").