Vacuum-Formed Fitted Cap for Uniform Fastener Sealant Shrouds
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Solution Overview
Problem
Manual brush application of sealant to fasteners is laborious, time-consuming, and lacks quality control, with existing sealant applicators requiring skilled operators and having inconsistent methods and traceability.
Innovation Solution
A system comprising a support plate, fastener template, precursor cap, and cap-manipulation tool, where a polymer sheet is heated and vacuum-formed to create a fitted cap that applies a uniform sealant shroud to fasteners, allowing for efficient and consistent sealant application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual brush application of sealant is used, then flexibility and adaptability to irregular surfaces are maintained, but labor intensity increases and quality consistency deteriorates
Solution Approach 1:
The sealant application system is designed to apply sealant automatically without requiring manual brush manipulation. The cap rotates automatically or is driven by a mechanism that distributes sealant uniformly around the fastener, allowing the system to serve itself rather than requiring continuous human intervention while maintaining adaptability to irregular surfaces.
Solution Approach 2:
The manual brush mechanical system is replaced with an automated sealant delivery mechanism. Instead of using a brush that requires manual control, the invention uses a controlled delivery system that can automatically apply and distribute sealant, replacing the need for manual mechanical brush application while improving productivity and consistency.
2Adaptability or versatility
If manual brush sealing is used, then ability to handle irregular surfaces is maintained, but quality control becomes difficult and rework increases
Solution Approach 1:
The system incorporates feedback mechanisms to monitor and control sealant application quality. Sensors or detection systems can verify proper sealant distribution and coverage, providing feedback that allows for real-time adjustments to maintain consistent quality across all fasteners, eliminating the quality control difficulties associated with manual brush application.
Solution Approach 2:
The invention controls sealant application parameters such as flow rate, pressure, and distribution pattern to ensure consistent quality. By precisely controlling these parameters, the system can maintain uniform sealant application even on irregular surfaces, significantly improving manufacturing precision compared to manual brush methods where parameter control is difficult.
3Extent of automation
If non-brush applicators are used, then some automation is introduced, but operator skill dependency remains and method consistency deteriorates
Solution Approach 1:
The sealant application system is designed to apply sealant automatically without requiring manual brush manipulation. The cap rotates automatically or is driven by a mechanism that distributes sealant uniformly around the fastener, allowing the system to serve itself rather than requiring continuous human intervention while maintaining adaptability to irregular surfaces.
4Manufacturing precision
If vacuum-forming process is used to create fitted cap, then manufacturing precision and uniformity are improved, but process complexity increases
Solution Approach 1:
The vacuum-forming process creates a precise copy or replica of the fastener's geometry. By using the fastener itself or a template as a mold, the system automatically generates a cap that perfectly matches the fastener's shape and dimensions, achieving high manufacturing precision without requiring complex manual measurement and fabrication processes.
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
Facilitates continuous and uniform sealant application, reducing labor and improving quality by enabling efficient distribution of sealant around fasteners with a rotatable cap-manipulation tool, preventing air bubbles and imperfections.
Implementation Method 1
heating a first polymer sheet to a specified temperature
Implementation Method 2
applying suction to the first polymer sheet, positioned a predetermined distance from the first side of the support plate and heated to the specified temperature by the first means, through the first plurality of through-openings from the second side of the support plate to vacuum-form the first polymer sheet over the precursor cap
Data Source
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AI summary
A system (200) for making a fitted cap (300) comprises a fastener template (202), dimensionally identical to a portion (106) of a fastener (100) and extending from a support plate (210), and a first plurality of through-openings (212) penetrating the support plate (210) and arranged about the fastener template (202). The system (200) also comprises a precursor cap (320) that is geometrically complementary to the fastener template (202), first means (217) for heating a first polymer sheet (270), and second means (219) for applying suction to the first polymer sheet (270) through the first plurality of through-openings (212) to vacuum-form the first polymer sheet (270) over the precursor cap (320). After vacuum-forming the first polymer sheet (270) over the precursor cap (320), at least a portion of the first polymer sheet (270) forms the fitted cap (300). The fitted cap (300) is configured to apply a shaped sealant shroud (590) to the portion (106) of the fastener (100).