Pot Spinning Pressing Member Suppresses String Yarn
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Solution Overview
Problem
The existing pot spinning methods face issues with rewinding defects due to the formation of string yarn, which complicates the machine configuration and increases costs, as described in Patent Document 1, where the use of a pair of aprons results in a large and costly setup.
Innovation Solution
A pot spinning method and machine that incorporates a pressing member with a pressing surface to eliminate string yarn by pressing it in the central axis direction of the pot during or after cake formation, preventing it from contacting the yarn guide or bobbin and thus avoiding rewinding defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pair of aprons is used to guide yarn into the pot, then string yarn formation is suppressed, but the machine configuration becomes complicated and large in scale
Solution Approach 1:
The invention extracts the essential function of the apron system (guiding yarn into the pot) and implements it through a simplified pressing member that presses the yarn guide against the pot inner wall, eliminating the need for complex apron mechanisms while maintaining the string yarn suppression effect
Solution Approach 2:
The pressing member is designed as a simple, cost-effective component compared to the expensive and complex apron system, achieving the same functional effect with a much simpler and cheaper solution
2Reliability
If a pair of aprons is used to guide yarn into the pot, then string yarn formation is suppressed, but the cost of implementation increases
Solution Approach 1:
The pressing member is designed as a simple, cost-effective component compared to the expensive and complex apron system, achieving the same functional effect with a much simpler and cheaper solution
Solution Approach 2:
The invention extracts the essential function of the apron system (guiding yarn into the pot) and implements it through a simplified pressing member that presses the yarn guide against the pot inner wall, eliminating the need for complex apron mechanisms while maintaining the string yarn suppression effect
3Ease of operation
If the pot is raised and lowered to shift winding position, then yarn winding position is adjusted, but the machine configuration becomes more complex
Solution Approach 1:
The pressing member serves multiple functions: it guides the yarn into the pot, suppresses string yarn formation, and enables winding position adjustment by pressing the yarn guide against different positions on the pot inner wall, eliminating the need for separate raising and lowering 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
This solution effectively suppresses the occurrence of rewinding defects at a lower cost by simplifying the machine configuration and ensuring proper yarn winding without the need for complex mechanisms like the pair of aprons, maintaining productivity.
Implementation Method 1
the yarn discharged from the yarn guide is wound around the inner wall of the pot while being twisted by the rotation of the pot
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A pot spinning method includes a cake-forming step of forming a cake (28) by rotating a pot (12) in a state where a yarn guide (11) is inserted into the pot (12) and moving the yarn guide (11) in a central axis direction of the pot (12) so that yarn (18) discharged from a lower end of the yarn guide (11) is wound around an inner wall (22) of the pot (12), and a rewinding step of rewinding the yarn (18) forming the cake (28) onto a bobbin (25) from the inner wall (22) of the pot (12) by causing the bobbin (25) to advance into the pot (12), wherein string yarn (33) present in a space inside the pot (12) away from the inner wall (22) of the pot (12) is eliminated either during or after formation of the cake (28) by pressing the string yarn (33) in the central axis direction of the pot (12) using a pressing surface (24a) of a pressing member (24).