| 摘要: |
| 目的 研究可发性聚乙烯(Expandable Polyethylene，EPE)网热封质量与热封参数(EPE网拉伸率、电热丝直径、电热丝温度及热封时间)的关系，分析EPE网热封过程的特性，为EPE网热封式包装机的设计奠定基础。方法 通过试验与电热耦合仿真结合研究镍铬合金丝不同电流下的电热特性，建立电流与温度的模型，同时开展三因素三水平全因子试验，分析确定EPE网的最佳热封参数。结果 模型仿真瞬态温度比温度传感器实测更准确，EPE网的拉伸率越低，热封强度越大;EPE网最佳热封参数如下:电热丝直径2 mm，热封温度130 ℃，热封时间4 s。结论 温度传感器的热惰性使电热丝的测量值滞后于实际值，这种影响在快速升温过程中尤为突出;通过建立电热耦合模型可以更精准地表征电热丝的电热特性，为瞬态温度的测量提供一种方法;EPE网热封工艺的研究可为水果的EPE网套包装防护提供一种普适性更强、效率更高的包装方法。 |
| 关键词: 镍铬合金丝 EPE网 电热耦合 热封参数 全因子试验 |
| DOI：10.19554/j.cnki.1001-3563.2025.07.008 |
| 分类号: |
| 基金项目:新疆维吾尔自治区自然科学基金(2022D01C674) |
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| Electric Heating Characteristics of Nickel-chromium Alloy Wire and Heat Sealing Process of EPE Net |
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NIU Jie1, XIONG Ying2, ZHANG Hui1
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(1.College of Intelligent Manufacturing Modern Industry,Urumqi 830017, China;2. Engineering Training Center, Xinjiang University, Urumqi 830017, China)
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| Abstract: |
| The work aims to study the relationship between the Expandable Polyethylene (EPE) net heat sealing quality and heat sealing parameters (EPE tensile rate, diameter of electric heating wire, temperature of electric heating wire and time of heat sealing), and analyze the characteristics of the heat sealing process of EPE nets, so as to lay a foundation for the design of EPE net heat sealing packaging machines. The electrothermal characteristics of nickel-chromium wires under different current were studied by experiments and electrothermal coupling simulation, and current and temperature models were established. At the same time, three-factor and three-level full factor tests were carried out to analyze and determine the optimal heat sealing parameters of the EPE net. The simulated transient temperature was more accurate than that measured by temperature sensor. The lower the tensile ratio of the EPE net, the greater the heat sealing strength. The optimum heat sealing parameters of the EPE net were as follows:the diameter of electric heating wire was 2 mm, the heat sealing temperature was 130 ℃, and the time of heat sealing was 4 s. The thermal inertia of the temperature sensor causes the measured value of the electric heating wire to lag behind the actual value, which is especially prominent in the process of rapid temperature rise. By establishing the electrothermal coupling model, the electrothermal characteristics of the electric heating wire can be characterized more accurately, which provides a method for the prediction of transient temperature. The research of the EPE net heat sealing technology can provide a more universal and efficient packaging method for the protection of fruit EPE net sleeve packaging. |
| Key words: nickel-chromium alloy wire EPE net electrothermal coupling heat sealing parameters full factor test |
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