Profiled Element Manufacturing Using Foaming Reaction Mixture
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Solution Overview
Problem
Existing methods for manufacturing profile elements for sealing building-structure joints are inefficient, costly, and complex, with issues such as high material resistance to movement, large joint widths, and inconvenient mounting, particularly for expansion joints in drywalls.
Innovation Solution
A method involving a film with a free-flowing reaction mixture applied and sealed within, using a casting system with a feed apparatus, roll for perforation, conveying means, thermal welding, and foaming to create a cylindrical profile element, which is then cut to length and optionally shaped for acoustic, smokeproof, and fireproof sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing compounds or joint cords are used to seal gaps between gypsum board and ceiling, then sealing against sound and smoke is achieved, but the material presents strong resistance to movement requiring comparatively large joint widths
Solution Approach 1:
The patent changes the physical and chemical parameters of the sealing material by using a two-component reaction mixture that transforms from a liquid state to a foamed solid state. This parameter change allows the material to initially flow easily for application, then expand and set to provide effective sealing with reduced joint width requirements compared to traditional rigid sealing compounds
2Reliability
If traditional manufacturing methods with closed flexible film tubes are used for profile strands, then fire protection is achieved, but mounting and handling become difficult
Solution Approach 1:
The patent extracts and eliminates the closed flexible film tube from the final product. Instead of using pre-formed tubes that require removal and complex handling, the invention applies the reaction mixture directly onto a support structure where it foams and sets in place, achieving fire protection through the foam material itself while dramatically simplifying mounting and handling operations
3Reliability
If complex manufacturing steps with multiple components are used for profile elements, then sealing performance is improved, but manufacturing time and costs increase considerably
Solution Approach 1:
The patent merges multiple manufacturing steps and components into a single integrated process. The two-component reaction mixture is applied in one step, automatically foams and expands to form the complete profile element with integrated sealing properties. This eliminates the need for separate steps of tube formation, material filling, and component assembly, thereby dramatically improving manufacturing efficiency while maintaining sealing performance
4Quantity of substance
If predetermined diameter tubes are used for joint cord manufacturing, then material containment is achieved, but material backup occurs during manufacturing or insufficient material compound results
Solution Approach 1:
The patent replaces the static predetermined diameter tube with a dynamic system where the reaction mixture is applied as a liquid or paste that automatically expands to fill the available space. This dynamic approach allows the material to adapt to the joint geometry during the foaming process, ensuring uniform material distribution and preventing both backup and insufficient filling that occur with rigid predetermined tubes
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
Enables cost-effective, continuous, and endless manufacturing of profile elements for sealing building-structure joints, improving movement absorption and ease of mounting, while preventing material backup and ensuring effective sealing against sound, smoke, and fire.
Implementation Method 1
applying a free-flowing reaction mixture on an upper side of the film, joining a first side-edge region of the film with a second side-edge region of the film to create a substantially cylindrical profile element
Implementation Method 2
thermal welding, and foaming to create a cylindrical profile element
Data Source
AI summary
A profile element is useful for sealing building-structure joints, especially for sealing against sound and smoke and optionally against fire. An apparatus is useful for manufacturing such profile element and to the use of the profile element manufactured according to the invention for the acoustic, smokeproof and/or fireproof sealing of connecting joints in drywalls, especially of expansion joints.