Interlinked Subunit Additive Manufacturing for Flexible 3D Structures
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Solution Overview
Problem
Existing additive manufacturing methods are limited by the selection of input materials, which often result in non-flexible, rigid, and environmentally harmful products, with high energy consumption and production waste, and struggle to produce fabric-like structures with desired properties.
Innovation Solution
The use of yarn-like input materials interlinked as subunits to create three-dimensional structures through Stitch Additive Manufacturing (SAM), which allows for flexible, breathable, and structurally sound fabric-like products by interlinking rather than fusing the material, using a flying eye and receiver or feeder and latch hook to form repeating subunits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional additive manufacturing methods use binder-powder, heat-fusible, or photo/thermo-polymerizing materials, then structural integrity is achieved, but flexibility and tensile strength are limited
Solution Approach 1:
The structure is divided into discrete, interlinked subunits that are assembled together. Each subunit maintains its structural integrity while the interlinking mechanism provides flexibility and tensile strength through the connections between units, rather than relying on a continuous fused material structure.
Solution Approach 2:
The system combines multiple material types within a single structure - rigid materials for subunit bodies providing structural integrity, and flexible materials for interlinking components providing flexibility and tensile strength. This composite approach allows both contradictory properties to coexist in different parts of the same structure.
2Ease of manufacture
If heat is applied to melt plastics during printing, then material consolidation is achieved, but energy consumption increases
Solution Approach 1:
The thermal field (heating and melting) is replaced with a mechanical field approach. Instead of melting and fusing materials through heat, the system uses mechanical manipulation to interlink discrete subunits, eliminating the need for high-temperature processing while achieving material consolidation through physical assembly.
Solution Approach 2:
The processing parameters are fundamentally changed from thermal parameters (temperature, heating rate) to mechanical parameters (force, displacement, interlinking geometry). This parameter transformation allows material consolidation without the high energy consumption associated with thermal processing.
3Stability of the object's composition
If plastic materials are used in additive manufacturing, then structural stability is achieved, but environmental harm and production waste increase
Solution Approach 1:
The material selection parameters are expanded beyond traditional plastics to include natural fibers, biodegradable polymers, and other environmentally friendly materials. These alternative materials can achieve structural stability through the interlinked subunit design while being biodegradable or recyclable, thus reducing environmental harm.
Solution Approach 2:
The system enables easier disassembly and recovery of materials due to the modular interlinked structure. Components can be separated and reused or recycled more efficiently compared to fused plastic structures, reducing waste and environmental impact.
4Ease of manufacture
If traditional additive manufacturing methods are used, then manufacturing capability is achieved, but production speed is slow
Solution Approach 1:
Subunits are pre-formed and prepared before final assembly. This preliminary preparation allows for parallel processing where multiple subunits can be manufactured independently and then quickly interlinked, significantly improving production speed compared to traditional layer-by-layer additive manufacturing where each layer must be processed sequentially.
Solution Approach 2:
Dividing the manufacturing process into independent subunit production and assembly phases enables parallel manufacturing of multiple subunits, which can then be rapidly interlinked. This segmentation of the manufacturing workflow increases overall productivity while maintaining manufacturing capability.
Data Source
Figure 1
Figure 2A~2E
Figure 3A~3B
AI summary
An additive manufacturing system and an input material that overcomes that need to heat and extrude solidifying materials to create a three-dimensional structure. The system arranges subunits of the input material into repeating, interlinked subunits that can be arranged to manufacture a three-dimensional structure that is flexible but also has sufficient structural integrity to retain a desired shape during the additive manufacturing process or post-manufacturing usage. During the additive manufacturing process, the flexible input material can be manipulated and reformed to match the shape and structure of a target three-dimensional structure, upon which the manufactured three-dimensional structure is based. As elongated units of the input material are received by the additive manufacturing machine, the machine assembles the input material into the interlinked, repeating subunits, thereby removing the need to heat and extrude an input material to create a structure.