共查询到19条相似文献,搜索用时 78 毫秒
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介绍了英国Chronos公司密炼机上辅机控制系统的工作原理,并且制定了密炼机上辅机控制系统改造方案。方案设计采用上下机位模式,从硬件和软件两方面对改造方案作了详细阐述。改造后的系统性能稳定,人工劳动强度降低,达到了预期效果。 相似文献
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结合本公司炼胶中心的设计,把炭黑压送系统和密炼机上辅机的工艺配置与厂房层数及防火设计、供油方式结合在一起,进行合理的设置和经济分析比较,改通常的4层厂房为3层;加大日储罐容量,免设大储仓;利用介于高位油箱和大循环之间的一种供油方式,使最终设计方案简单实用,并大大降低了建设过程中的一次性投资。 相似文献
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文章介绍北京橡胶工业研究设计院万向机电新技术公司研制的两级微机上辅机控制系统,其中包括计算机控制系统及计算机软件。经实际使用证明,该两级微机上辅机控制系统的先进性和可靠性已达到德国BUCHLER公司的水平。 相似文献
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探讨气力输送过程中各工艺辅助时间及成本和炭黑粒子破碎对密炼机炼胶效率的影响.通过采用相应输送管材和相应技术措施防止结垢,并优化工艺缩短炭黑投料和注油等辅助过程时间后,可大大提高密炼机混炼效率.针对密炼机投料过程中易产生堵塞的问题,采用圆形偏心料斗和软斜槽及管夹阀后,可大大减少堵塞,提高炼胶效率. 相似文献
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密炼机上辅机是指炼胶所需的炭黑、胶料、小料、油料等的储存、输送、称量、投料等设备。不同的企业上辅机差别很大,但一般都包含有以下内容:炭黑的输送、储存、称量、投料;油料输送、储存、称量、压注;塑炼胶或母炼胶导开、称量、投料等。在很多企业,生胶还是靠人工搬运、切割、搬上投料称。一、密炼机上辅机的优点随着密炼机的发展,每一车混炼的物料越来越多,转速越来越快,人工投料在混炼周期中所占用时间的百分比也越来越大,严重影响密炼机效率的发挥和混炼胶的质量。此外,随着企业的发展,所需物料很多,都需靠人工搬运、称量、投料,工人… 相似文献
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介绍了密炼配方时间减少的措施,通过密炼控制工艺的调整,在不增加硬件改造费用,不调整工艺配方的前提下,缩短密炼辅助时间,提高胶料产量,提高密炼机的利用效率. 相似文献
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N. Nakajima 《Polymer International》1996,41(1):23-33
In this paper, differences between mill mixing and internal mixer operation are discussed, the experimental results of the energy balance during mixing with an internal mixer are presented, and then an energy-based modelling of the mechanism of mixing in the internal mixer is proposed. 相似文献
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密炼机为推进节能减排在科技创新中不断发展 总被引:1,自引:1,他引:0
橡胶工业节能减排潜力很大,其中橡胶机械的技术创新是关键所在。密炼机在科技创新中不断发展,为炼胶工艺的节能减排潜力的挖掘创造了条件。大连橡塑为实现低碳发展,坚持技术创新,注重空间效益、集成效益和规模效益,推出大型密炼机;跟踪低温炼胶新工艺,进行新型密炼机的开发,取得了一次炼胶装备的配套研发、叠加式密炼机的研发成果,以及新型转子等密炼机组成部位的创新改造成果。 相似文献
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P Manjula P Kalaichelvi K Dheenathayalan 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2010,85(1):115-120
BACKGROUND: Jet mixing is one of the simplest methods to achieve mixing. There have been a number of experimental studies concerned with jet mixing; some of these studies report empirical correlations. The existing correlations are not useful where there are significant deviations from the idealized conditions. Most correlations reported in the literature deal with liquid flow with single or multiple jets, whereas the effect of radial angle on mixing time was not studied. This present study investigates the effect of operating parameters on experimental mixing time in a double jet mixer. Nozzle configuration for jet1 was fixed based on earlier studies (2/3rd position, nozzle angle 45° and nozzle diameter 10 mm). Mixing times were estimated for different jet2 configurations of jet angle (30°, 45° and 60°), radial angles (60°, 120°, 180°), jet diameter (5 mm and 3 mm) and located at different tank heights (2/3rd and 1/3rd from the bottom of the tank). RESULTS: A mixing time correlation was developed in terms of all the parameters using dimensional analysis. The constants and powers of the parameters involved in the correlation developed were estimated using a least square method to calculate the straight line that best fitted the mixing time data obtained during the experiments. The effects of change in angle of inclination of jet2 (θ2), radial angle of jet2 with respect to jet1 (Φ2) and diameter of jet2 (d2) on mixing time were analyzed and compared with the experimental mixing time. CONCLUSION: The correlation developed based on the dimensional analysis and least square method predicts the mixing time for a double jet mixing tank. Copyright © 2009 Society of Chemical Industry 相似文献
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未增塑聚氯乙烯(UPVC)配方拟定后,高速混合机的加料量、加料顺序、混合温度和混合耐间等因素,都会对聚氯乙烯(PVC)干混料的质量和产量有重要影响,这里仅从几个工艺控制点来分析影响的因素、程度及解决方案。 相似文献