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本文简要介绍了几种新型销钉及机筒结构、销钉调整装置、销钉断裂检测装置以及销钉传递式挤出机的结构,供有关设计、制造和使用销钉机筒挤出机的工程技术人员参考。 相似文献
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本文简要介绍了几种新型销钉及机筒结构,销钉调整装置,销钉断裂检测装置以及销钉传递式挤出机的结构,供有关设计,制造和使用销机筒挤出析工程技术人员参考。 相似文献
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采用高效节能设备节能
多年来,为提高生产效率和节能降耗,开发了许多行之有效的工艺设备,在生产中发挥了重要作用。1.销钉机筒冷喂料挤出机销钉机筒冷喂料挤出机的开发和应用,是橡胶挤出机技术的一场革命, 相似文献
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传统的销钉挤出机的销钉是沿机筒周向均布,向内插入螺杆的螺槽根部。意大利科美高(COLMEC SPA)公司开发的这款新型销钉挤出机则别出心裁,销钉从方形机筒插入后与螺杆相切。销钉杆中设计有冷却介质通道。 由于新型挤出机的销钉与胶料直接接触的长度比传统的挤出机的销钉更长,因此对胶料的剪切作用更大。同时,由于销钉中设计了冷却通道,可以更好地将胶料的热量带出。据科美高公司称,新型挤出机的速度可以比传统销钉挤出机快40%,但排胶温度却比传统销钉挤出机还低。相同规格的这种新型销钉挤出机的生产能力比传统的销钉挤出机可以… 相似文献
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介绍了销钉机筒冷喂料挤出机中销钉,螺钉及其新型温控装置的工作原理,论述了上述元件节能的理论依据。实验证明,该产品的性能优于普通冷喂料挤出机,可与引进的国外同类产品相媲美,三者能耗分别为0.074,0.15-0.22,0.12kW.h/kg。 相似文献
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通过建立简化的销钉机筒挤出机塑化段物理模型,从流变分析中的能量方程出发,导出销钉机筒挤出机塑化段温度的传热模型;结合试验数据,拟合出挤出温度随螺杆转速变化的曲线。结果表明,曲线可分为急速增长段、平缓增长段和稳定增长段3部分,且平缓增长段是挤出温度、质量和能耗综合指标最佳的区间。 相似文献
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The effect of a vibration force field on the melting process of an extruder is studied. It is shown that the mechanism for melting differs from conventional theory. Experimental studies of melting of low‐density polyethylene (LDPE) pellets in a vibration‐induced single‐screw (VISS) extruder show that melting is initiated on the inside of the barrel and the surface of screw. Models were developed that explain the melting mechanism in those regions. The melting at the surface of the screw is mainly initiated by frictional work on the pellets by the vibration and rotation of the screw. The melting action at the barrel is induced by a barrel temperature higher than the melting point and propagated by viscous dissipation heating of the melt film produced. The theory is supplemented by a calculation sample, which shows good agreement with experimental data obtained on a transparent barrel VISS (T‐VISS) extruder and a half‐open barrel VISS (H‐VISS) extruder with LDPE. The results of the experiment and calculation sample indicate that the introduction of vibration‐induced field can improve the melting capacity of extruder to a great extent. The present model enables the prediction of processing parameters for VISS extruders, from which the optimum operating conditions can be obtained. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 2504–2514, 2007 相似文献
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销钉机筒挤出机螺槽横截面内流体流动与混合的研究 总被引:1,自引:0,他引:1
在一定简化条件下,对销钉机筒挤出机螺槽横截面内的流场及混合均化效果以及销钉位置对流场和混合均化效果的影响进行了数值与实验研究。提出了流场中某点混合均化效果、整个流场平均混合均化效果以及混合均化效果统计分布的数值计算与评价方法。数值分析结果与实验结果具有较好的一致性。结果表明,销钉对物料具有明显的强化流动与混合均化的作用:销钉愈接近于螺棱,强化混合均化的效果愈显著:有销钉结构较无销钉结构的平均混合均化效果提高2.5%-5.6%;有销钉结构随着挤出时间的增加,混合均化效果不断提高,无销钉结构随着挤出时间的增加,当混合均化效果达到一定值后则不再提高。 相似文献
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This study investigates the effects of processing conditions (the screw speed, throughput, barrel temperature, and screw configuration) on the chemical conversion and morphology evolution of polyamide/polyolefin blends along a twin‐screw extruder. Polymer samples were collected rapidly at specific barrel locations with a special sampling device for subsequent chemical and morphological characterization. Increasing the screw speed or using more restrictive screw modules at the beginning of the melting zone promoted a faster reaction and better dispersion along the extruder. Increasing the throughput or decreasing the barrel temperature slowed the evolution of the morphology and chemical conversion along the extruder because of the lower melting rate. As soon as melting started, the chemical reaction took place. However, high chemical conversion rates required extensive melting, that is, significant interface generation. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
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对机筒的加热器位置、机筒长度和机筒内径等影响单螺杆FDM线材挤出机挤出成型的机筒结构因素进行了分析,以压力梯度、出口平均温度和流场平均温度为试验指标,基于ANSYS Workbench软件进行正交试验和极差分析,得到最优因素组合。并在试压工况、正常工况、极限工况和极限冷态工况等4种工况下,对采用最优因素组合设计的机筒进行了热力耦合试验验证。试验结果表明:当机筒的加热器位置43 mm、机筒长度270 mm、机筒内径15 mm时,单螺杆FDM线材挤出机出丝顺利,效率较高且安全可靠。 相似文献