Rounded Cleat Roofing Membrane Plate Wear Reduction
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Solution Overview
Problem
Existing roofing membrane plates cause wear and tear on underlying membranes due to sharp edges, leading to potential punctures and inadequate securement under uplift forces like wind pressure.
Innovation Solution
Injection-molded plastic roofing membrane plates with rounded terminal ends and tapered cleats that make surface-to-surface abutment with the membrane, providing structural integrity and minimizing wear while securing the membrane effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal membrane plates with sharp edges are used, then structural strength and securement capability are improved, but wear and tear on the underlying membrane increases leading to potential punctures
Solution Approach 1:
The patent applies curvature by replacing sharp edges with rounded edges on the membrane plate. Specifically, the membrane plate includes rounded edges that contact the underlying membrane, eliminating sharp corners that would concentrate stress and cause punctures. This curvature modification maintains structural integrity while distributing contact pressure evenly across the membrane surface, preventing wear and tear.
Solution Approach 2:
The patent changes the geometric parameters of the membrane plate by introducing rounded edges with specific radii of curvature. The rounded edges have controlled dimensions that balance structural strength requirements with membrane protection needs. This parameter modification transforms the plate from a sharp-edged geometry to a rounded geometry, resolving the contradiction between strength and membrane damage prevention.
2Ease of operation
If conventional membrane plates are used, then securement function is provided, but inadequate securement under uplift forces like wind pressure occurs
Solution Approach 1:
The rounded edges of the membrane plate improve securement under uplift forces by distributing contact pressure evenly across the membrane surface. This curvature prevents stress concentration at sharp corners, allowing the plate to maintain reliable contact with the membrane during wind uplift events. The rounded geometry enables the plate to conform better to the membrane surface, enhancing friction and adhesion forces that resist uplift.
3Object-affected harmful factors
If injection-molded plastic plates with rounded terminals are used, then wear on membrane is minimized, but manufacturing complexity increases
Solution Approach 1:
The patent merges the rounded edge feature directly into the membrane plate body through injection molding, creating a one-piece construction. The rounded edges are formed as integral features of the molded plate rather than as separate components or post-processing additions. This integration simplifies manufacturing by eliminating assembly steps while maintaining the wear-minimizing rounded geometry.
Solution Approach 2:
The injection molding process readily accommodates the rounded edge geometry through appropriate mold design. The rounded terminals are formed with controlled radii of curvature that achieve the desired wear minimization while being easily manufactured using standard injection molding techniques. The plastic material properties allow for smooth rounded transitions without requiring complex manufacturing operations.
Data Source
AI summary
An injection-molded plastic roofing membrane plate includes a body and multiple cleats. The cleats extend from a bottom surface of the body. Each of the cleats has a rounded terminal end with a rounded terminal surface. The rounded terminal surfaces make surface-to-surface abutment with an underlying membrane in installation. The rounded terminal surfaces reduce wear on the underlying membrane that may otherwise occur.