Yarn Interlacing Airflow Restriction for Uniform Interlacement
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Solution Overview
Problem
Existing interlacing apparatuses for yarns experience variations in fluid flow velocity, leading to inconsistencies in yarn-to-yarn interlacement during the interlacing process.
Innovation Solution
An interlacing apparatus with a housing and nozzle unit featuring a first and second air flow passage, where a restricting member is positioned upstream in the first flow passage to regulate air flow, reducing velocity variations by impinging most of the air flow on the restricting member before it reaches the nozzle members, thereby stabilizing the air flow velocity entering the second flow passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a plurality of interlacing pieces are arranged side by side in a direction along a fluid passage, then the interlacing apparatus can process multiple yarns simultaneously, but variation in fluid flow velocity among the fluid supply holes causes yarn-to-yarn interlacement variation
Solution Approach 1:
The patent introduces a restricting member at a specific location in the fluid passage to locally modify the flow characteristics. This restricting member creates a localized flow restriction that compensates for the natural flow distribution variations, ensuring that each fluid supply hole receives a more uniform flow velocity, thus achieving consistent interlacement across all yarns while maintaining multi-yarn processing capability
Solution Approach 2:
The restricting member is positioned upstream in the fluid passage to pre-regulate the flow before it reaches the plurality of fluid supply holes. By controlling the flow distribution in advance, the system ensures that each interlacing piece receives appropriate fluid flow, preventing interlacement variation before it occurs during the actual interlacing 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
The configuration reduces yarn-to-yarn interlacement variation by ensuring uniform air flow velocity, enhancing the consistency of the interlacing process.
Implementation Method 1
A restricting member is disposed at a position in the first flow passage upstream of a center in the first direction of a region in which the nozzle members are arranged, and the restricting member restricts a portion of an air flow flowing through the first flow passage
Implementation Method 2
The nozzle unit includes a plurality of nozzle members arranged side by side in a first direction, and ejects air supplied to inlets of the nozzle members via the air flow passage, from each of the plurality of nozzle members, to a corresponding one of a plurality of yarns arranged side by side in the first direction, to interlace the plurality of yarns
Data Source
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AI summary
An interlacing apparatus (5) includes a housing (30) and a nozzle unit (40). The housing (30) includes an air flow passage (31) formed therein. The nozzle unit (40) performs ejection from each of a plurality of nozzle members (42) to interlace a plurality of yarns. The air flow passage (31) includes a first flow passage (32) and a second flow passage (33). The first flow passage (32) extends in a first direction. The second flow passage (33) is connected to the first flow passage (32) and extends in a second direction intersecting the first direction and toward inlets (44) of nozzle members (42). A restricting member (60) is disposed in the most upstream region (A1) of regions obtained by dividing, in the first direction, a region of the first flow passage (32) in which the nozzle members (42) are arranged, into three equal parts. The restricting member (60) restricts a portion of an air flow flowing through the first flow passage (32). The restricting member (60) covers at least half of a flow passage cross-sectional area of the first flow passage (32).