Textile Interlacing Jet Smooth Yarn Channel Design
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Solution Overview
Problem
Existing textile jet nozzles for interlacing multifilament yarns face issues with filament abrasion due to stepped side walls, which require precise alignment and are not suitable for close thread line spacing, making them inefficient and costly to manufacture.
Innovation Solution
A textile jet assembly with an insert plate and impact plate forming a yarn channel with parallel opposed side walls, aligned by pins to prevent abrasion and allow for closer thread line spacing, featuring a simplified alignment and fastening system that minimizes setup time and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If stepped side walls are used in traditional textile jet nozzles, then the structure is simpler to manufacture, but filament abrasion increases due to violent vortex air flow over the steps
Solution Approach 1:
The patent applies curvature by replacing the traditional stepped side walls with smooth, curved side walls in the yarn channel. This eliminates the sharp edges and steps that cause violent vortex air flow and filament abrasion, while maintaining manufacturing feasibility through standard machining processes for curved surfaces.
2Object-affected harmful factors
If precise alignment is required for coplanar side walls, then filament abrasion is reduced, but device complexity and setup time increase
Solution Approach 1:
The patent implements self-alignment features where the upper and lower nozzle sections have integrated alignment mechanisms such as tapered surfaces, dowel pins, or keyed features that automatically ensure coplanar side walls during assembly. This eliminates the need for external alignment tools and skilled manual adjustment, reducing both device complexity and setup time while maintaining the smooth side wall configuration that prevents filament abrasion.
3Ease of manufacture
If traditional two-piece jet nozzles are used, then manufacturing is easier, but thread line spacing must be larger due to alignment requirements
Solution Approach 1:
The patent uses smooth, curved side walls instead of stepped configurations, which eliminates the need for precise alignment between upper and lower sections. This allows the nozzle to be designed with a more compact geometry, reducing the required thread line spacing between adjacent jets while maintaining manufacturing simplicity through standard curved surface machining.
Solution Approach 2:
By incorporating self-alignment features into the two-piece nozzle design, the patent enables automatic coplanar alignment of side walls during assembly. This eliminates the need for large clearance gaps between adjacent jets, allowing closer thread line spacing while maintaining ease of manufacture through simple assembly procedures.
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
The solution reduces filament abrasion, improves yarn properties, and enables closer thread line spacing, making it suitable for modern melt spinning machines, while reducing manufacturing costs and complexity.
Implementation Method 1
A jet for air interlacing multifilament textile yarn includes an insert plate and an impact plate forming a yarn channel and a threading slot and a centrally positioned jet orifice communicating with the yarn channel
Implementation Method 2
U.S. Pat. No. 5,964,015 discloses a textile jet nozzle in which the location of the horizontal transition of an insert plate and impact plate is on the same plane as the top channel surface. This eliminates the traditional stepped side walls which optimizes vortex air flow and reduces abrasion
Data Source
AI summary
A textile jet subassembly includes a textile jet or jet nozzle mounted on a base support. An upper impact plate and a lower insert plate form the yarn channel passing through the jet or jet nozzle. A jet interface and a threading slot communicate with the yarn channel and the sidewalls above and below the threading slot are coplanar to form a smooth surface. Multiple alignment or registration recesses and cooperating pin fasteners are spaced from the yarn channel on the same side of the yarn channel to properly align the side walls above and below the threading slot.