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齿轮泵挤出技术在橡塑行业的应用与发展 总被引:2,自引:0,他引:2
简要介绍了齿轮泵的结构、性能及工作原理,从齿轮泵挤出机的发展,齿轮泵挤出系统向压延机喂料,齿轮泵与MCTD挤出机相结合三个方面,讲述了其在橡塑行业中应用的优越性及缺憾。 相似文献
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橡胶加工用齿轮泵及配备齿轮泵的挤出机 总被引:1,自引:0,他引:1
目前,国际上在橡胶材料的挤出加工工艺中已开始采用齿轮泵。文中介绍了齿轮泵,单螺杆挤出机以及配备齿轮泵的单螺杆橡胶挤出机三者各自的特征和优缺点。 相似文献
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在板片材、管材、双向拉伸薄膜、光纤电缆等产品的挤出加工生产中,将一个熔体齿轮泵安装在挤出设备上是非常必要的,熔体齿轮泵究竟能带来哪些好处呢?[编者按] 相似文献
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阐述了塑料挤出成型中“精度”的含义。介绍了几种能够提高塑料挤出制品精度的技术与装置,其中包括齿轮泵、压力波动控制器、口模厚度自动调节装置等。 相似文献
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分析了单螺杆挤出机的生产局限性,介绍了单螺杆挤出机与齿轮泵联用的优点:挤出型材尺寸稳定,胶料焦烧的可能性降低,能量需求小,设备构造紧凑,占地面积小,是下一代挤出生产线发展的趋势。 相似文献
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介绍了熔体齿轮泵在聚合物加工中的性能与特点,列举了用于塑料、橡胶挤出的熔体齿轮泵的用途和特点.在聚合物加工中使用熔体齿轮泵可以提高生产效率和产品质量,降低生产成本. 相似文献
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Gear pump assisted extrusion is becoming popular in the plastics processing industries. The growth has been tremendous since 1980. In this study, the benefits of gear pump assisted extrusion, especially in single screw applications, is critically reviewed, and a method of predicting the operational conditions of the gear pump assisted extrusion system is discussed. Further, shortening the length to diameter ratio of the extruder in gear pump assisted extrusion was analyzed and found to produce a reduction in energy consumption, provided melting is completed. 相似文献
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通过对聚酯装置增容和后接直纺长丝前后熔体齿轮泵工况变化的统计分析,研究其运行不稳定的原因,提出改造措施,包括滑动轴承润滑油槽,齿轮泵的机械密封,降低齿轮泵出口压力,改自动提速为手动提速等等。 相似文献
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James M. McKelvey 《Polymer Engineering and Science》1984,24(6):398-402
Within the past several years considerable interest has developed in the practice of retrofitting plasticating extruders with gear pumps. The primary motivation for this is to reduce surges and fluctuations in the extrusion rate, thereby improving product quality and reducing waste. It is shown that the effectiveness of a gear pump for this purpose is directly related to its volumetric efficiency, which depends upon the pump dimensions, the flow behavior of the polymer, and the operating variables of temperature, pressure differential, and pump speed. Experimental data on three thermoplastic materials using a pump having gear wheels of 36 mm diameter for both leakage and power are reported. These data have been correlated with semi-empirical equations. 相似文献