Axially Split Splicing Channel Unit with Offset Chambers
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Solution Overview
Problem
Existing splice channel units for pneumatic splicers require multiple designs to accommodate different yarn types and counts, leading to a large number of splicers and logistical challenges when yarn is changed, as they struggle to maintain threads within the splicing channel due to axial and radial forces from compressed air.
Innovation Solution
A splice channel unit with axially divided chambers having offset axes and sharp abutting edges, along with optimized inlet duct designs for splicing air, reduces thread ejection by increasing friction and controlling airflow, allowing for a wider range of yarn compatibility without additional covers or holding mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple splice channel unit designs are maintained for different yarn types, then splicing quality for specific yarns is improved, but device complexity and logistical effort increase
Solution Approach 1:
The splicing channel unit is designed with adjustable thread holding elements that can be positioned at different locations along the splicing channel. This allows a single universal design to accommodate different yarn types and counts by adjusting the holder positions, eliminating the need for multiple specialized designs while maintaining splicing quality across various yarn specifications
Solution Approach 2:
The thread holding elements are made adjustable and repositionable rather than fixed, allowing dynamic adaptation to different yarn properties. The elements can be moved along the splicing channel to optimize their position for specific yarn types, providing flexibility without requiring multiple static designs
2Reliability
If compressed air is blown into the splicing channel to mix and twist fibers, then splicing quality is improved, but threads are pressed out of the insertion slot and splicing channel
Solution Approach 1:
Thread holding elements are introduced as intermediary components between the compressed air flow and the threads. These holders restrain the threads during the splicing process, preventing the harmful effect of air pressure from ejecting the threads while allowing the beneficial fiber mixing and twisting to occur
Solution Approach 2:
The thread holding elements are positioned to preemptively counteract the ejection force generated by compressed air before it can push the threads out of the insertion slot. By applying a restraining force in advance, the holders prevent the harmful effect of thread ejection while allowing the splicing air to perform its useful function of mixing and twisting fibers
3Reliability
If control plates and thread pressure levers are used to prevent thread ejection, then thread retention is improved, but device complexity increases
Solution Approach 1:
Multiple functions are combined into the thread holding elements, which simultaneously provide thread retention, guide threads into the splicing channel, and restrain threads during the splicing process. This integration reduces the number of separate control components needed while maintaining effective thread retention
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 enables a single splicer to handle a broader spectrum of yarns with improved splicing quality and reduced logistical efforts, as the sharp edges and controlled airflow prevent thread ejection and ensure effective mixing and twisting of fibers.
Implementation Method 1
the sharp edges not only slow down the axial movement of the threads directly through the friction exerted on them
Implementation Method 2
Each splicing chamber has its own tangentially opening inlet duct for the splicing air, which generates eddy currents directed in opposite directions to one another in the chambers
Data Source
Figure 1
Figure 2
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AI summary
The invention relates to a splice channel unit (60) for a splicer (10) with a splice channel (20) which is subdivided in its axial direction, so that two splice chambers (20o, 20u) are formed, the axes (76, 77) of which are offset from one another, characterized in that the butt edges (20SKo, 20SKu) of the two splice chambers (20o, 20u) have a radius of curvature (80) of greater than 0 mm and less than 0.35 mm. The invention also relates to a splicer (10) containing such a splice channel unit (60) and to a textile machine (1) with such a splicer (10).