Spun Yarn Drawing Apparatus Thermal Insulation Box
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Solution Overview
Problem
Conventional spun yarn drawing apparatuses require high thermal energy to heat thin yarns efficiently, leading to inefficient heat utilization due to small contact areas between yarns and heating rollers, resulting in wasted heat and increased energy consumption.
Innovation Solution
Incorporating a thermal insulation box that houses both preliminary and thermosetting rollers, with a contacting member that utilizes heat radiated from the thermosetting roller to preheat the yarn before it reaches the preliminary heating roller, reducing the number and diameter of heating rollers and enhancing heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the number of heating rollers or the diameter of each heating roller is increased to sufficiently heat the yarns, then the heating effectiveness is improved, but the thermal energy consumption is significantly increased
Solution Approach 1:
The patent introduces a contacting member that preheats the yarn before it reaches the heating rollers. This preliminary heating action reduces the temperature differential that the heating rollers must overcome, allowing them to operate at lower temperatures or with reduced contact time, thereby decreasing thermal energy consumption while maintaining effective yarn heating
Solution Approach 2:
The contacting member acts as an intermediary between the heat source and the yarn. It captures and concentrates radiant heat from the heating rollers and transfers it directly to the yarn surface, improving heat transfer efficiency and reducing the total thermal energy required from the heating rollers
2Temperature
If the contacting length between heating roller and yarn is increased to sufficiently heat the yarns, then the heating effectiveness is improved, but the diameter of heating rollers must be increased
Solution Approach 1:
The contacting member performs preliminary heating of the yarn before it contacts the heating rollers. This advance heating action reduces the required contacting length with the heating rollers, as the yarn already possesses elevated temperature and requires less thermal energy transfer to reach the target temperature
Solution Approach 2:
The patent introduces a new spatial dimension by placing the contacting member above the heating rollers in the vertical direction. This allows the yarn to receive heat from multiple sources (contacting member and heating rollers) simultaneously, effectively increasing the total heating surface area without increasing the diameter of the heating rollers
3Temperature
If many heating rollers or large-diameter heating rollers are used to heat the yarns, then the heating coverage is improved, but the thermal energy efficiency deteriorates due to exposed roller surfaces
Solution Approach 1:
The contacting member is positioned to be heated by the radiant heat from the heating rollers itself, rather than requiring a separate heat source. It then transfers this heat to the yarn, creating a self-sustaining heat transfer chain that utilizes the existing thermal energy field without additional energy input
Solution Approach 2:
The contacting member serves as a heat transfer intermediary that concentrates and directs thermal energy from the heating rollers onto the yarn. This mediation improves the spatial efficiency of heat transfer, ensuring that thermal energy is delivered precisely where needed rather than being lost to the surrounding environment
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 reduces thermal energy consumption, improves heating efficiency by utilizing heat radiated from the thermosetting roller, and allows for a more uniform temperature distribution, thereby minimizing heat wastage and optimizing the size and number of heating rollers.
Implementation Method 1
utilizes heat radiated from the thermosetting roller to preheat the yarn
Implementation Method 2
a thermal insulation box that houses both preliminary and thermosetting rollers
Implementation Method 3
the yarns are heated to a temperature which is equal to or higher than a glass transition temperature by the preliminary heating rollers
Data Source
Figure 1
Figure 2
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AI summary
A spun yarn drawing apparatus with improved heating efficiency, which requires less consumption of heat energy for heating yarns heating roller, is provided. A spun yarn drawing apparatus 2 includes godet rollers 18 to 21 for drawing yarns Y spun out from a melt spinning apparatus 4 and a thermal insulation box 22 that houses the godet rollers 18 to 21 therein. In the thermal insulation box 22, there are contacting rollers 14 to 17 that contact the yarns Y before they are wound onto the godet rollers 18 to 21 and do not use any heat source during a stable operation.