Textured Metal Sheeting for Adhesive-Free Mechanical Lamination
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Solution Overview
Problem
Existing methods for laminating materials rely on adhesives, which are costly, messy, and prone to failure under stress, and are undesirable from an environmental perspective, limiting the ability to create adhesive-less laminated materials, especially for larger scales and custom sizes.
Innovation Solution
A continuous process that textures bulk material sheeting using toothed knives to create raised, pointed structures, allowing for mechanical attachment without adhesives, enabling the formation of strong, lightweight laminates from heterogeneous materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesives are used to join laminated materials, then the lamina can be joined together, but the cost increases, messiness increases, noxious fumes are emitted, and the laminate is prone to failure under stress
Solution Approach 1:
The patent removes the adhesive substance entirely from the lamination process, replacing it with a mechanical attachment system using protrusions and recesses that join materials through physical interlocking rather than chemical bonding, thereby eliminating noxious fumes and mess
Solution Approach 2:
The patent replaces the chemical bonding mechanism of adhesives with a mechanical attachment system where protrusions on one lamina engage with recesses on another, creating a physical interlock that joins materials without requiring adhesive substances
2Strength
If adhesives are used to join laminated materials, then the lamina can be joined together, but the laminate is prone to failure or shattering under various stresses
Solution Approach 1:
The patent removes the adhesive layer that creates weak bonding points prone to failure, replacing it with a mechanical interlocking system that distributes stress across the entire joint interface through multiple engagement points between protrusions and recesses
Solution Approach 2:
The patent divides the bonding interface into multiple discrete engagement points where individual protrusions interact with corresponding recesses, creating numerous small bonding zones that collectively provide superior stress distribution and failure resistance compared to a continuous adhesive layer
3Strength
If adhesives are used to join laminated materials, then the lamina can be joined together, but the underlying materials are fouled and recycling or reclamation is prevented
Solution Approach 1:
The patent removes adhesive residues that foul and contaminate the underlying materials, allowing the base materials to remain clean and recoverable after the laminate is disassembled, thereby enabling recycling and reclamation processes
Solution Approach 2:
The patent enables easy separation and recovery of the base materials by eliminating adhesive contamination, allowing the protrusions and recesses to be removed or separated without leaving harmful residues that would prevent material recycling or reclamation
4Strength
If mechanical attachment is used on individual parts, then strong attachment is achieved, but the process is limited to thick steel in heavy individual plates and cannot be used on continuous larger scale material
Solution Approach 1:
The patent extends the mechanical attachment concept from discrete individual parts to continuous production by forming protrusions and recesses along continuous sheets or coils of material, allowing the process to operate continuously rather than requiring stop-start processing of individual pieces
Solution Approach 2:
The patent transitions the mechanical attachment system from two-dimensional surface attachment on thick plates to three-dimensional volumetric protrusions formed within the material itself, enabling the process to handle thin-gauge materials while maintaining attachment strength
5Ease of manufacture
If individual parts are fed from a magazine with uniform size and outline, then mechanical attachment can be provided, but size and shape variations are limited and custom lengths are not convenient
Solution Approach 1:
The patent makes the mechanical attachment system dynamic and adaptable by allowing the protrusion and recess geometry, density, and distribution to be varied along the continuous material length, enabling customization for different applications without requiring uniform part specifications
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 process enables the creation of strong, lightweight laminates by forming continuous rows of pointed structures on the material surface, enhancing strength and stiffness while eliminating the need for adhesives, allowing for the combination of lower-grade materials and facilitating recycling.
Implementation Method 1
the sheeting is repeatedly impacted with toothed knives, each knife creating a row of raised and generally pointed structures on the sheeting
Implementation Method 2
The hook, in one embodiment, is curled or twisted from the axis of its row. The hook shape is determined by the shape of the teeth on the knives, and the knives' path of travel
Implementation Method 3
allowing for mechanical attachment without adhesives
Data Source
AI summary
A material including a metal sheet, a first plurality of raised and pointed structures, and a second plurality of raised and pointed structures is provided. The metal sheet includes first and second opposed sides, and a thickness between the first and second opposed sides. The first plurality of raised and pointed structures are gouged out of the first side of the metal sheet. The sheet is not perforated, and the raised and pointed structures of the first plurality have a height of between 150% and 300% of the thickness. The second plurality of raised and pointed structures are gouged out of the second side of the metal sheet.