Yarn Winding Cylinder Diameter for Balloon Stability
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Solution Overview
Problem
High-speed yarn unwinding from yarn feeding bobbins often results in insufficient balloon formation, leading to sloughing and frequent yarn breakages due to increased winding speeds, which decreases package production efficiency.
Innovation Solution
A yarn winding device with a yarn unwinding assisting device that includes a cylinder with an inner diameter of 28-30 mm to cap the yarn feeding bobbin, regulating the bulge of the curved path and stabilizing yarn tension, thereby preventing sloughing and ensuring efficient unwinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the winding speed is increased to improve package production efficiency, then productivity increases, but the balloon becomes insufficiently formed leading to sloughing and yarn breakage
Solution Approach 1:
The patent applies parameter changes by specifying a precise inner diameter range for the cylinder (28-30 mm) to optimize balloon formation. This dimensional parameter adjustment allows the system to maintain reliable yarn unwinding even at high winding speeds, resolving the contradiction between productivity improvement and reliability maintenance.
2Productivity
If the winding speed is increased to improve package production efficiency, then productivity increases, but sloughing occurs due to insufficient balloon formation
Solution Approach 1:
The patent uses parameter changes by defining a specific inner diameter range (28-30 mm) for the cylinder that prevents sloughing while enabling high-speed operation. This parameter optimization ensures sufficient balloon formation even at increased winding speeds, eliminating the harmful sloughing effect while maintaining high productivity.
3Shape
If a smaller cylinder is used to improve balloon regulation, then the bulge control improves, but the balloon becomes too small causing sloughing
Solution Approach 1:
The patent resolves this contradiction through parameter changes by establishing the optimal inner diameter range of 28-30 mm for the cylinder. This specific parameter range balances balloon bulge regulation with sufficient balloon size, preventing both excessive bulge and insufficient formation that would cause sloughing and yarn breakage.
Data Source
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AI summary
A yarn unwinding assisting device (20) of a yarn winding unit (1) includes a movable cylinder (31) that, during yarn unwinding from a yarn feeding bobbin (8), is to be put on to cap an end portion on a side from which a yarn is unwound of the yarn feeding bobbin (8) to thereby regulate a bulge of a curved path of the yarn. An inner diameter of the movable cylinder (31) is greater than or equal to 28 mm and less than or equal to 30 mm.