Round Metal Duct Joint Sealing With UV-Cured Gaskets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional HVAC ductwork experiences significant air leakage at joints due to the impracticality of using gasketing materials that require long curing times or excessive surface tack, making volume manufacturing challenging.
Innovation Solution
A round metal HVAC duct with a fast-curing gasket that adheres to sheet metal and has minimal surface tack, utilizing ultraviolet light for quick curing and foaming to reduce material usage, allowing for efficient assembly and minimal air leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gasketing material with good adhesion to sheet metal is used, then sealing effectiveness is improved, but curing time increases to two to three hours or two to three days
Solution Approach 1:
The patent changes the chemical parameters of the gasketing material formulation to achieve fast curing (20 minutes or less) while maintaining good adhesion to sheet metal. This involves modifying the chemistry of the sealant to reduce curing time without sacrificing bonding strength, thereby resolving the contradiction between sealing effectiveness and curing time.
Solution Approach 2:
The patent replaces traditional slow-curing chemical sealants with a UV-curable gasketing material that cures through photopolymerization. This substitution of the curing mechanism (from chemical time-dependent curing to light-triggered rapid curing) enables fast curing while maintaining adhesion, resolving the time-effectiveness contradiction.
2Productivity
If a gasketing material with short curing time is used, then manufacturing productivity is improved, but surface tack increases causing shipping problems
Solution Approach 1:
The patent adjusts the formulation parameters of the gasketing material to achieve a balance between fast curing and minimal surface tack. By modifying the chemical composition and curing characteristics, the material cures quickly (20 minutes or less) while minimizing residual surface tack, thus resolving the contradiction between productivity and shipping compatibility.
Solution Approach 2:
The patent uses UV-curable gasketing material that transitions from a tacky state to a cured state through photopolymerization. This substitution of curing mechanism allows rapid curing with controlled surface properties, eliminating the excessive surface tack problem associated with traditional fast-setting sealants and enabling both high productivity and safe shipping.
3Reliability
If traditional gasketing materials are used, then adhesion to galvanized steel is achieved, but manufacturing time increases making volume manufacturing impossible
Solution Approach 1:
The patent modifies the gasketing material parameters to achieve fast curing (20 minutes or less) while maintaining adhesion to galvanized steel. This parameter optimization enables the material to bond effectively to the metal surface without requiring extended curing times, thereby supporting high-volume manufacturing operations.
Solution Approach 2:
The patent replaces traditional slow-curing sealants with UV-curable gasketing material that cures rapidly through light exposure. This substitution enables adhesion to galvanized steel within 20 minutes or less, making volume manufacturing feasible by eliminating the need for lengthy curing periods or complex stacking systems.
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 enables rapid manufacturing of ducts with sealed joints, reducing air leakage and facilitating timely production by using a gasket that cures in 20 minutes or less, ensuring minimal surface interaction during shipping and efficient assembly.
Implementation Method 1
The use of ultraviolet light to quicken the curing of the gasketing material
Implementation Method 2
Good adhesion to sheet metal
Data Source
AI summary
This invention relates to sealing HVAC ductwork along its joints in order to reduce air leakage. The ductwork can be sealed by the combination of a gasket and mechanical locking mechanism.