Spun Yarn Drawing Apparatus Vertical Roller Heat Management
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Solution Overview
Problem
Existing spun yarn drawing apparatuses face challenges in maintaining stable temperature adjustment of rollers due to heat convection and thermal insulation issues, particularly when preliminary heating and thermosetting rollers are densely arranged at different temperatures.
Innovation Solution
The apparatus features a high-temperature first heating roller positioned above the second heating roller, with both rollers housed in a tiltable thermal insulation box, allowing for efficient heat utilization and minimizing heat convection, while the yarn path is optimized to prevent bending and enhance space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If preliminary heating rollers and thermosetting rollers are densely arranged in left-right direction with different temperatures, then the compactness of the apparatus is improved, but the temperature adjustment stability deteriorates due to heat convection and thermal interference
Solution Approach 1:
The patent transitions from a horizontal arrangement (left-right direction) to a vertical arrangement (up-down direction) of rollers. This dimensional change allows multiple rollers with different temperatures to be stacked vertically, reducing horizontal thermal interference while maintaining compact footprint. The vertical stacking enables better thermal isolation between rollers of different temperatures.
Solution Approach 2:
The patent introduces asymmetric temperature distribution in the vertical arrangement, where odd-numbered rollers (1st, 3rd, 5th) are set at a first temperature and even-numbered rollers (2nd, 4th) are set at a second temperature. This asymmetric temperature pattern, combined with the vertical arrangement, optimizes heat convection patterns and reduces thermal interference between adjacent rollers.
2Productivity
If rollers are arranged with yarn winding at 360 degrees or lower, then the winding efficiency is improved, but the temperature control precision deteriorates due to increased heat convection effects
Solution Approach 1:
By arranging rollers vertically instead of horizontally, the patent reduces the horizontal distance over which heat convection occurs. The vertical stacking with controlled winding angles minimizes the horizontal component of yarn path, thereby reducing heat convection effects while maintaining efficient winding.
Solution Approach 2:
The patent applies different temperature settings to specific rollers based on their position and function. Odd-numbered rollers operate at one temperature while even-numbered rollers operate at another, creating localized thermal zones that optimize both winding efficiency and temperature control for different sections of the yarn processing path.
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 configuration enables stable temperature adjustment and efficient heat management, allowing for the production of yarns with high glass transition temperatures like polyester fibers, and allows for flexible production of various yarn types by adjusting the number and arrangement of rollers.
Implementation Method 1
The yarn running on these rollers is heated to a temperature not lower than a glass transition temperature by the preliminary heating rollers
Implementation Method 2
the heat generated by the rollers does not escape to the outside
Implementation Method 3
heated air moves up, and the temperatures around the respective preliminary heating rollers lined up in the up-down direction are different on account of heat convection
Data Source
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AI summary
An object is to provide a spun yarn drawing apparatus capable of efficient use of the heat generated by rollers. The spun yarn drawing apparatus 2 includes godet rollers 14 to 18. The godet rollers 14 to 18 include godet rollers 17 and 18 configured to thermally set a drawn yarn Y. Onto the godet rollers 14 to 18, the yarn Y is wound serially from the lowest roller to the highest roller, each at a winding angle of 360 degrees or lower. The godet rollers 17 and 18 are provided above the godet rollers 14 to 16 where the yarn Y before drawn passes through.