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采用高分子材料加工理论和有限元方法,建立了聚甲醛连续挤压的有限元模型,模拟了聚甲醛连续挤压过程的温度场分布,分析了预热温度和滑动块滑动速度对聚甲醛在滑动块沟槽、模腔和模具中的温度场的影响规律。模拟结果表明:随着预热温度和滑动速度的提高,在整个连续挤压成型过程中坯料温度升高,高温区的范围有扩大趋势,并且滑动块速度的提高使高温区扩展的程度小于预热温度改变带来的影响。该研究对于聚甲醛连续挤压工艺的制定具有重要指导作用。
The finite element model of continuous extrusion of polyoxymethylene was established by using polymer material processing theory and finite element method. The temperature distribution of polyoxymethylene during continuous extrusion was simulated. The effects of preheating temperature and sliding speed of sliding block on polyoxymethylene Slider grooves, mold cavity and the temperature field of the law. The simulation results show that with the increase of preheating temperature and sliding velocity, the billet temperature increases during the whole continuous extrusion process, the range of high temperature region has an expanding trend, and the increase of the slider velocity makes the high temperature region expand less than the pre- The impact of changing the temperature of the hot. This research has an important guiding role for the formulation of continuous extrusion of polyoxymethylene.