Space-Dyed Yarn Processing With Precise Pattern Registration
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Solution Overview
Problem
Conventional space-dyeing methods for yarn production face challenges such as high costs, excessive dye usage, waste, and unpredictable dye patterns due to imperfect registration and overspray issues, leading to undesirable un-dyed areas and color overlap.
Innovation Solution
A process involving extruding polymeric filaments, texturizing them into yarn plugs, and selectively applying dye in a controlled manner using a system with conduits and nozzles controlled by a processor to achieve precise, spaced dyeing, followed by cooling and winding onto a creel, allowing for predictable and controllable space-dyeing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional continuous space-dyeing processes are used with multiple rollers or spray systems, then production efficiency is improved compared to batch processes, but dye mist and drips occur causing unwanted marks and wasted dye liquor
Solution Approach 1:
The patent extracts and eliminates the harmful dye mist and drips from the dyeing process by using a enclosed dyeing chamber with suction devices that capture and remove excess dye liquor, preventing it from contaminating the yarn and environment while maintaining continuous production efficiency
Solution Approach 2:
The patent introduces an intermediary suction system and enclosed chamber between the dyeing rollers/sprays and the yarn to capture and remove dye mist and drips, acting as a mediator that allows continuous dyeing to proceed efficiently while preventing the harmful effects of dye contamination
2Productivity
If conventional continuous space-dyeing processes apply multiple colors via rollers or sprays, then production efficiency is improved, but dye overspray from various colors mixes together in collection system resulting in wasted dye and disposal costs
Solution Approach 1:
The patent segments the dye collection system into separate collection devices for each dye color, allowing each color to be collected and reused independently rather than mixing all dyes together in a single collection system, thereby reducing dye waste and disposal costs while maintaining continuous production
Solution Approach 2:
The patent implements recovery systems that capture and reuse excess dye liquor through separate collection devices for each color, preventing dye waste and reducing the need for frequent dye replacement while maintaining efficient continuous production
3Productivity
If conventional batch-type or continuous space-dyeing methods are used, then production is achieved, but imperfect registration occurs resulting in undesired un-dyed areas and color overlap
Solution Approach 1:
The patent employs feedback control mechanisms including sensors and control systems that monitor yarn position and dye application in real-time, automatically adjusting dyeing parameters to maintain precise registration and eliminate un-dyed areas or color overlap while maintaining continuous production output
Solution Approach 2:
The patent uses dynamic adjustment mechanisms that allow real-time modification of yarn speed, dye application rate, and registration position during continuous dyeing, enabling precise control of dye pattern registration despite variations in production conditions
4Manufacturing precision
If constant overspray of dye is applied to prevent un-dyed areas, then coverage is improved, but more dye is used than necessary increasing production cost and causing undesirable overlapping of adjacent dyed areas
Solution Approach 1:
The patent applies dye precisely only where needed through controlled localized application methods rather than constant overspray, achieving complete coverage of required areas while minimizing excess dye consumption and preventing unwanted color overlap between adjacent dyed sections
Data Source
AI summary
A process for manufacturing spaced dyed yarn for use with tufted or pile carpet including applying one or more colors of dye to one or more yarns in a predetermined spaced relation to form a colorized yarn having a predetermined color pattern.