Multifilament Yarn Processing With Variable-Nozzle Fluid Treatment
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Solution Overview
Problem
Existing methods for producing multicolored yarns, such as those used in carpet manufacturing, face limitations in filament mixing due to texturized structures and require high pressure interlacing, which restricts flexibility and color variation.
Innovation Solution
A method involving the use of nozzles that deliver a pressurized fluid at varying pressures, rates, and temperatures to treat continuous filaments before and after interlacing, allowing for separate and concurrent treatment of filaments to achieve varying properties along the yarn length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If sub-threads are texturized before post-interlacing, then the yarn structure is formed, but filament mixing is limited and high pressure is required for interlacing
Solution Approach 1:
The patent applies preliminary action by performing pre-interlacing of filaments before texturizing. The filaments are interlaced in the green state (before texturizing) using pre-interlacing nozzles, which creates initial mixing and positioning. This preliminary interlacing allows better filament mixing before the texturizing process sets the final yarn structure, resolving the contradiction between structure stability and mixing versatility.
2Temperature
If sub-threads are cooled by cooling medium after texturizing, then the filaments become rigid, but increased pressure input is required for interlacing
Solution Approach 1:
The patent performs post-interlacing before the texturizing and cooling steps that would rigidify the filaments. By interlacing the filaments while they are still in a more flexible state (before cooling), the required interlacing pressure is reduced. The preliminary interlacing action is taken while the material properties are still favorable, avoiding the need to overcome rigidified filaments later.
3Manufacturing precision
If uniform treatment is applied to all filaments, then consistent yarn quality is achieved, but fluctuating color and structure effects are lost
Solution Approach 1:
The patent applies local quality by enabling different treatment conditions for different filaments or different sections of the yarn. The pressurized fluid treatment can be applied with varying parameters (pressure, temperature, flow rate) to different filaments or at different positions along the yarn, creating localized variations in color, texture, or structure while maintaining overall yarn quality. This allows multicolored and varied structure effects while preserving manufacturing precision through controlled local variations.
Solution Approach 2:
The patent introduces dynamics by making the treatment parameters variable rather than fixed. The pressurized fluid treatment can be dynamically adjusted in terms of pressure, temperature, and flow rate during the processing operation. This dynamic control allows the system to produce yarns with fluctuating colors and structures along their length, transforming a static uniform treatment into a dynamic variable treatment process.
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 flexible production of yarns with fluctuating colors and structures by enabling separate and concurrent treatment of filaments, overcoming the limitations of traditional methods.
Implementation Method 1
one or more of said nozzles deliver said fluid at a varying pressure and/or rate and/or temperature
Data Source
AI summary
Method for manufacturing yarn, wherein said yarn comprises a plurality of continuous filaments, wherein said method comprises at least the following steps: —the step of spinning, preferably melt spinning, a plurality of continuous filaments; and—the step of treating said plurality of continuous filaments by means of a pressurized fluid supplied by two or more nozzles, and wherein one or more of said nozzles deliver said fluid at a varying pressure and/or rate and/or temperature.