本论文针对国内常用制袋机的热封温度控制系统进行讨论与研究。
Main subject discussed in this thesis focus on the high precision temperature control for the domestic bag-making machine.
热封：把两层或多层表面融合为一的方法。它是把涂层或基层材料在固定的温度、压力和接触时间下进行。
Heat sealing: a method of uniting two or more surfaces by fusion either of the coatings or of the base materials under control led conditions of temperature pressure and dwell time.
热封：把两层或多层表面融合为一的方法。它是把涂层或基层材料在固定的温度、压力和接触时间下进行。
Heat sealing: a method of uniting two or more surfaces by fusion, either of the coatings or of the base materials, under controlled conditions of temperature, pressure and dwell time.
结果表明，封严篦齿上的裂纹为热疲劳裂纹，裂纹的形成主要与第三封严篦齿附近的温度场有关。
The results show that the cracks on the sealing labyrinth are heat-fatigue cracked resulted by the temperature field around the third tooth of the sealing labyrinth.
采用双路控制的热封机构，温度控制更精确，封合质量更高，包装材料更广。
Two side heat sealing with PID temperature controller to have more accurate temperature control, more strong sealing quality, more wider usage of packaging material.
然而，通常热膨服系数高的封接玻璃软化温度低，而热膨胀系数低的软化温度偏高。
The soldering glass has a rather low coefficient of expansion as well as low sealing temperature.
然而，通常热膨服系数高的封接玻璃软化温度低，而热膨胀系数低的软化温度偏高。
The soldering glass has a rather low coefficient of expansion as well as low sealing temperature.
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