Flat Knitting Machine Yarn Consumption Control via Stored Correction Values
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Solution Overview
Problem
Existing methods for controlling yarn consumption on flat knitting machines experience significant correction jumps and visible variations in stitch length when transitioning between different types of weaves, leading to inaccurate yarn length adjustments.
Innovation Solution
A method that records correction values for each type of weave during the production of the first knitted piece, allowing for precise control of take-off parts by accounting for yarn fluctuations and stitch length, with data transferable across different sizes and machines, and enabling storage for later use, thus eliminating the need for adjustment rows and visible stitch length fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If correction values are adjusted during production to account for yarn fluctuations, then yarn consumption control precision is improved, but correction jumps and visible stitch length variations occur at weave type transitions
Solution Approach 1:
The system determines correction values for each weave type in advance during the production of a first knitted piece, storing them for future use. When transitioning to a new weave type, the pre-determined correction values are immediately applied, eliminating the need for adjustment rows and preventing visible stitch length variations at transitions.
Solution Approach 2:
The knitted fabric is divided into different weave type regions, each with its own stored correction values. The system identifies transitions between different weave types and applies the appropriate pre-stored correction values for each segment, ensuring consistent stitch length across different weave regions without correction jumps.
2Reliability
If correction values are determined for each individual row, then adaptability to yarn fluctuations is improved, but production time increases due to continuous adjustment rows
Solution Approach 1:
Correction values for each weave type are determined in advance during the production of a first knitted piece and stored for reuse. This eliminates the need for continuous adjustment rows in subsequent productions, maintaining high yarn consumption accuracy while significantly improving production speed.
Solution Approach 2:
The system creates a model or template of correction values for each weave type based on the first knitted piece. These copied correction values are then applied to subsequent productions of the same weave types, maintaining reliability while reducing production time.
3Manufacturing precision
If correction values are recalculated for each new size, then size-specific accuracy is improved, but device complexity and processing time increase
Solution Approach 1:
The system stores correction values organized by weave type rather than by specific size or machine. These universal correction values can be applied across different sizes and machines for the same weave type, reducing device complexity while maintaining size-specific accuracy through the pattern data interface.
Solution Approach 2:
Correction values determined for one size can be copied and applied to other sizes of the same weave type. The system uses the pattern data to adapt the copied correction values to different sizes, reducing the need for recalculation while maintaining accuracy.
Data Source
Figure 1
AI summary
The invention relates to a method for regulating the yarn consumption of the knitted fabric manufactured on the flat knitting machine. The method comprises steps of measuring the actual value of the practical value of the yarn consumption and regulating the rated value through regulating the coil length. In order to determine the correction value of the withdrawing needle triangle component for controlling the length of the paired coil of the flat knitting machine, the position of the withdrawing needle triangle component made by each knitting type of the knitting fabric according to the knitting fabric pattern. And before the production, the first knitting fabric portion (21) is manufactured according to the identical pattern of the follow-up produced knitting fabric, and the compression between the practical value and the rated value of the yarn consumption is constantly performed in order to improve and store the knitting type correction value presented in each knitting fabric, and the determined correction value for controlling the withdrawing needle triangle component is used for producing the knitting fabric.