Yarn Attachment Printing on Complex Textile Surfaces
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Solution Overview
Problem
Current three-dimensional printing systems face challenges in efficiently bonding yarns with heat-moldable and melt-resistant materials to complex surfaces, particularly in textile materials used in footwear and apparel, where traditional methods require flat substrates and release layers, limiting flexibility and attachment precision.
Innovation Solution
A method and system that utilize a nozzle to dispense heat-moldable materials in a liquid state and melt-resistant materials in a solid state, selectively attaching the yarn to attachment regions on a base by transitioning the heat-moldable material from liquid to solid, while maintaining the melt-resistant material as a continuous segment, allowing for direct contact and bonding without delamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional bonding methods are used on flat substrates with release layers, then the bonding process is simple and straightforward, but the attachment precision and flexibility are limited when working with complex surfaces
Solution Approach 1:
The patent applies parameter changes by transitioning the heat-moldable material from liquid state to solid state through controlled cooling, enabling precise attachment to complex surfaces. The nozzle system also dynamically adjusts its position (contact vs. non-contact) and the base thickness is modulated during the process, allowing adaptation to varying surface geometries while maintaining attachment precision
Solution Approach 2:
The system employs dynamics by making the nozzle movable along the first axis to selectively contact different attachment regions on the base. The base thickness is dynamically reduced during attachment and then restored, allowing the system to adapt to complex surface geometries. This dynamic adjustment enables precise attachment positioning on three-dimensional surfaces without requiring flat substrates
2Strength
If heat-moldable material is used for bonding, then strong bonds can be achieved, but the material may melt or deform if not properly controlled
Solution Approach 1:
The patent uses composite materials by combining heat-moldable material with melt-resistant material in the yarn structure. The heat-moldable material (such as polyethylene terephthalate) provides bonding capability when melted and re-solidified, while the melt-resistant material (such as polyacrylonitrile) maintains structural integrity and prevents deformation during the heating process. This composite approach enables strong bonds while ensuring material stability
Solution Approach 2:
The process exploits phase transitions by heating the heat-moldable material to its melting point to create a liquid state for bonding, then allowing it to cool and re-solidify to form strong attachments. The controlled phase transition from solid to liquid and back to solid enables reliable bonding without excessive heat that would damage the yarn structure
3Manufacturing precision
If the nozzle contacts the base to reduce thickness for attachment, then precise bonding is achieved, but the base structure may be damaged or deformed
Solution Approach 1:
The system applies preliminary action by temporarily reducing the base thickness only at the specific attachment region where bonding is needed, rather than affecting the entire base structure. The nozzle contacts only the targeted attachment region to create the bond, then restores the base thickness. This localized preliminary deformation minimizes impact on overall base structural integrity while achieving precise bonding
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
Enables precise and flexible attachment of yarns to complex surfaces without the need for flat substrates or release layers, enhancing the manufacturing process for three-dimensional printed articles by ensuring strong bonds and allowing for varied surface geometries and designs.
Implementation Method 1
The heat moldable material bonds to the first attachment region during a transition of the heat moldable material from the liquid state to a solid state
Implementation Method 2
moving the nozzle along the first axis into the first attachment region reduces the base thickness by a prodding distance
Data Source
AI summary
A method and system are disclosed. A method of printing onto a base having an upper surface spaced from a lower surface by a base thickness includes dispensing a yarn from a nozzle of a printing system and selectively attaching the yarn to a first attachment region. The step of dispensing the yarn includes dispensing a heat-moldable material and a melt-resistant material. The step of selectively attaching the yarn to the first attachment region includes moving the nozzle into the first attachment region. The step of moving the nozzle into the first attachment region reduces the base thickness by a prodding distance. The heat-moldable material bonds to the first attachment region.