Core Yarn Clamping Roller Groove for Full Filament Coverage
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Solution Overview
Problem
Conventional core yarn production methods result in the filament repeatedly protruding to the surface, affecting dyeability and skin contact, as the filament and staple fiber bundle delivery speeds cannot be varied, leading to incomplete coverage by the staple fiber composite.
Innovation Solution
A ring spinning machine with grooves on clamping rollers allows the filament to bypass the clamping line, enabling complete coverage by the staple fiber composite, achieved by guiding the filament through a groove on the clamping rollers without engagement, and varying the delivery speed relative to the staple fiber bundle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filament and staple fiber bundle are both clamped by the clamping line, then the components can be simultaneously gripped and wound, but the delivery speeds of the components cannot be varied, causing the filament to repeatedly reach the surface of the finished yarn
Solution Approach 1:
The filament is extracted from the clamping line engagement and guided through a groove on the clamping roller surface. This allows the filament to pass through the clamping device without being clamped, enabling independent delivery speed control while maintaining synchronized winding with the staple fiber bundle.
Solution Approach 2:
The clamping device is segmented into two functional zones: a clamping line for gripping the staple fiber bundle, and a groove structure for guiding the filament. This segmentation allows different components to be handled differently - the bundle is clamped for controlled feeding, while the filament is guided freely for speed variation.
2Reliability
If the filament delivery speed is increased to match the staple fiber bundle, then complete coverage can be achieved, but the filament structure becomes visible on the yarn surface
Solution Approach 1:
The filament is extracted from the clamping mechanism and passed through a groove on the clamping roller. This extraction allows the filament to be delivered at a higher speed than the staple fiber bundle, ensuring complete coverage while preventing the filament from protruding to the yarn surface by controlling its delivery independently.
3Adaptability or versatility
If a groove is added to the clamping roller to guide the filament, then the filament can bypass the clamping line, but the device complexity increases
Solution Approach 1:
The clamping roller is given multiple functions: it maintains its original clamping function for the staple fiber bundle through the clamping line, and simultaneously provides a groove structure to guide the filament. This multi-functionality allows the same component to handle both components differently, enabling delivery speed variation without adding separate guiding mechanisms.
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
Ensures complete coverage of the filament by the staple fiber composite, enhancing dyeability and preventing skin contact, while maintaining twist continuity and yarn fineness for improved textile production.
Implementation Method 1
the clamping rollers... roll against each other along a clamping line... the at least one thread is not clamped by the clamping rollers along the clamping line like the staple fiber composite, but is removed from clamping engagement by entering a groove
Implementation Method 2
a twisting device which twists the fiber composite leaving the clamping device and the at least one thread leaving the clamping device into a core yarn
Data Source
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AI summary
The present invention relates to a ring spinning machine (1) and a method for producing a core yarn (11), wherein a clamping device (6) with clamping rollers (8, 9) contacting each other in a clamping line (7) is traversed by a fiber assembly (2) exiting a drafting unit (5) and at least one thread (4), in particular continuous filament, to be supplied to the fiber assembly (2), and wherein the clamping line (7) is interrupted by at least one groove (13) circumferentially on the circumferential surface (12) of at least one of the clamping rollers (8, 9), which receives the at least one thread (4) as it passes through the clamping device (6) and guides it past the clamping line (7) without it being clamped by the mutually contacting clamping rollers (8, 9). The present invention further relates to a correspondingly produced core yarn (11).