Truncated Dome Molding System for ADA Compliance
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Solution Overview
Problem
Existing methods for forming detectable warning areas (DWAs) face challenges in producing consistent, standardized truncated domes that can be easily installed at different locations, with existing methods either resulting in domes that lose shape after curing or being difficult to transport and install away from the application site.
Innovation Solution
A method involving a die-cast mold with a peg and wings is used to create truncated domes by mixing a dome-forming material with a catalyst, pouring it into the mold, allowing it to harden, and then removing the dome, which can be easily secured to a substrate with a bonding agent, and optionally grinding the dome to a truncated shape for installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a rigid re-usable template is used to form domes, then the dome shape can be maintained during curing, but the domes cannot be easily transported and installed at different locations
Solution Approach 1:
The system is divided into separate components: a reusable rigid template for forming domes, and removable formed domes that can be transported and installed independently at different locations. This segmentation allows the template to maintain shape during formation while the individual domes gain portability for versatile installation.
Solution Approach 2:
Domes are pre-formed using the rigid template at a convenient location, allowing shape to be maintained during the forming process. Once cured, these pre-formed domes can be transported and installed at different final locations without requiring the template to be present, thus achieving both shape retention and installation flexibility.
2Shape
If dome material is allowed to cure for a longer period to retain shape, then the dome maintains its form better, but the installation process becomes more time-consuming
Solution Approach 1:
The domes are pre-formed and cured using the rigid template in advance, allowing sufficient curing time to be spent at a convenient location. Once cured, the domes are removed from the template and can be installed quickly at the final location without requiring extended curing time at the installation site, thus separating the curing process from the installation process.
3Productivity
If a mat template with multiple openings is used, then multiple domes can be formed simultaneously, but it becomes difficult to produce domes at different locations from the application site
Solution Approach 1:
The mat template with multiple openings allows simultaneous formation of multiple domes in one batch, increasing productivity. The individual domes are then removed from the template and can be transported to different installation locations, providing both efficient production and location flexibility.
Solution Approach 2:
Multiple domes are pre-formed simultaneously using the mat template at a convenient production location. Once cured and removed from the template, these domes can be distributed and installed at various final locations, achieving both high productivity during formation and versatility in installation locations.
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
This method allows for the production of standardized, durable truncated domes that can be efficiently installed at various locations, ensuring compliance with ADA specifications and providing effective hazard detection for visually impaired individuals.
Implementation Method 1
mixing a dome-forming material with a catalyst to form a mixture, allowing the mixture in the dome-shaped cavity of the die-cast mold to catalyze and harden
Data Source
AI summary
Detectable warning areas (DWAs) and methods of forming the same. A dome-forming material can be mixed with a catalyst to form a mixture, which can then be poured into a dome-shaped cavity of a die-cast mold or a reusable mat template with a grommet. A peg may be inserted into the mixture. The mixture may be allowed catalyze and harden.