Two-for-One Twisting Workstation for Longer Carpet Yarn Running Lengths
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Solution Overview
Problem
Existing two-for-one twisting or cabling machines are limited by standardized twisting package dimensions, restricting running length and requiring costly conversions to increase efficiency in downstream processes.
Innovation Solution
A workstation design with a package cradle, package drive roller, and yarn traversing device allowing for increased traversing strokes and longer empty tubes, enabling twisting packages with extended running lengths without altering downstream machinery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If standardized twisting package dimensions are used, then compatibility with downstream machinery is maintained, but running length is limited and requires frequent interruptions
Solution Approach 1:
The patent applies parameter changes by increasing the empty tube length from the standard 290 mm to 315 mm or more, and increasing the traversing stroke from 10 inches to 11 inches or more. These parameter modifications enable longer running lengths and reduced interruptions without requiring changes to downstream machinery, directly resolving the contradiction between productivity and time loss.
2Productivity
If twisting package diameter is increased, then running length may be extended, but compatibility with downstream creels is lost
Solution Approach 1:
The patent applies local quality by making specific localized modifications only to the workstation components (empty tube length, traversing stroke, frame arm dimensions) while maintaining the package diameter within the standard 400 mm limit. This allows the running length to be extended through increased length parameters rather than diameter, preserving compatibility with downstream creels that are restricted to maximum 400 mm package diameter.
3Productivity
If winding density is increased, then running length may be extended, but yarn quality deteriorates
Solution Approach 1:
The patent applies dimensionality change by extending the empty tube length in the longitudinal dimension rather than increasing winding density. This approach increases running length by utilizing additional length space (315 mm or more) instead of packing more yarn into the same volume, thereby avoiding the quality deterioration that would result from excessive winding density while maintaining standard package diameter constraints.
4Productivity
If machine conversions are implemented to increase efficiency, then productivity improves, but costs increase
Solution Approach 1:
The patent applies segmentation by isolating the modifications to specific workstation components (package cradle, frame arms, empty tube, traversing device) rather than requiring comprehensive machine conversions. This segmented approach allows productivity improvement through localized parameter changes while avoiding costly full-scale machine modifications, making the solution economically viable.
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
Enhances process efficiency and reduces energy consumption by allowing longer running times and fewer interruptions, while maintaining standard package dimensions and avoiding costly machine modifications.
Implementation Method 1
a package drive roller for frictionally driving the twisting package
Data Source
AI summary
Workstation of a two-for-one twisting or cabling machine for production of carpet yarn, including winding device having package cradle with two frame arms for rotatable mounting of an empty tube or twisting package, package drive roller for frictionally driving twisting package, yarn traversing device for traversing transfer of a yarn to the twisting package, advance roller for regulating a yarn tension, and cover in area of the advance roller with an opening for yarn guided through the yarn traversing device to the twisting package. Package cradle has at least one movable, partially rotatable frame arm and designed so an empty tube with length of at least 315 mm is insertable, that the package drive roller has length of at least 286 mm, that yarn traversing device has traversing stroke of at least 11 inches, and that opening in cover corresponds with the yarn path arising due to the traversing stroke.