Laminate Door Panels With Fabric Hinges for Impact Sealing
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Solution Overview
Problem
Industrial overhead sectional doors are prone to damage from impacts by material handling equipment, and existing designs fail to effectively absorb minor impacts without denting, cracking, or breaking, while also failing to prevent water and air intrusion between door sections.
Innovation Solution
The use of laminate panels with a laminate skin and core structure, combined with flexible hinges and seal structures, that can absorb impacts and maintain a seal to prevent intrusion of water and air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional solid door panels are used, then structural strength is maintained, but impact resistance deteriorates (panels dent, crack, or break upon impact)
Solution Approach 1:
The door panel is divided into multiple laminate layers (typically 3-5 plies) bonded together with adhesive. Each layer can be made from different materials (metal, plastic, wood, glass) with varying thicknesses and orientations, allowing the composite structure to absorb impact energy through layer deformation and delamination while maintaining overall structural integrity.
Solution Approach 2:
The door panel uses a composite laminate structure combining multiple materials with complementary properties. For example, alternating layers of rigid metal sheets with flexible plastic layers, or wood veneers with fiberboard cores, creating a material system that exhibits both strength and impact resistance that neither material could achieve alone.
2Strength
If rigid hinges are used to maintain structural integrity, then connection strength is improved, but flexibility and impact absorption deteriorate
Solution Approach 1:
The hinge connection uses flexible fabric material (such as reinforced textile or laminated fabric) instead of rigid metal hinges. The fabric hinge can bend and flex to accommodate panel movement and absorb impact energy, while still providing sufficient holding strength through its woven structure and attachment hardware.
Solution Approach 2:
The hinge design changes from rigid fixed parameters to flexible variable parameters, allowing the hinge angle and position to adjust dynamically during door operation and impact events. This flexibility enables the hinge to absorb energy while maintaining connection integrity.
3Ease of manufacture
If traditional sealing methods are used between panels, then manufacturing simplicity is maintained, but sealing effectiveness deteriorates (water and air intrusion occurs)
Solution Approach 1:
The sealing system uses flexible foam tape or rubber weatherstripping applied to the edges of laminate panels. These flexible seals conform to the contours of adjacent panels and maintain contact during door movement, effectively preventing water and air intrusion while accommodating the flexible nature of the laminate construction.
Solution Approach 2:
The seal structure combines multiple materials including foam core for compression and sealing, fabric or rubber outer layer for durability and weather resistance, and adhesive backing for attachment. This composite seal structure achieves superior sealing performance compared to single-material approaches.
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 laminate panels and hinge design provide impact resistance without breaking, while maintaining a seal to prevent air and water leakage, enhancing the durability and functionality of overhead sectional doors.
Implementation Method 1
Industrial overhead sectional doors are prone to damage from impacts by material handling equipment, and existing designs fail to effectively absorb minor impacts without denting, cracking, or breaking
Implementation Method 2
maintain a seal to prevent intrusion of water and air
Data Source
Figure 1
Figure 2
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AI summary
In example a panel for an overhead sectional door is provided. The panel includes a laminate core, a laminate skin, and a universal fabric hinge. The laminate skin is coupled to two opposing sides of the laminate core. The universal fabric hinge is coupled to the laminate skin to connect the panel to an adjacent panel of the overhead sectional door.