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作为橡胶混炼设备,混炼机在橡胶工业和轮胎工业占主导地位已经一个多世纪。切向式转子和啮合式转子是密炼机的两个基本设计。近十年来,为了解决地球环境问题,已经开发出白炭黑/硅烷补强轮胎胎面胶之类的新材料和新配方。为了提高胶料性能,必须优化各种填充剂在密炼机中密炼的分布和分散。特别是在混炼中的温度控制对控制配合剂的反应和减少在生产中的补充混炼步骤显得越来越重要。因此,为了获得所需的胶料性能。啮合式转子密炼机引人注目。本文对有关啮合式转子密炼机与切向式转子密炼机之间的对比所做的各种研究进行了介绍。啮合式转子密炼机的主要优点是它们较高的冷却和混炼效率。因此,为了提高混炼性能。已经研制出具有现代化转子的啮合式转子密炼机。 相似文献
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根据普通密炼机一段混炼工艺和密炼结合开炼机低温混炼工艺,通过硫化特性、门尼黏度、Payne效应、基本力学性能及耐疲劳性能和耐磨耗性能等测试,研究了密炼机转子转速和开炼机薄通次数对胎面胶结构与性能的影响。结果表明,改变密炼机转子转速对硫化胶的耐疲劳性能和耐磨耗性能影响较大,随着转子转速的增加,胶料的疲劳寿命先下降后提高、耐磨耗性能逐渐上升;改变薄通次数对门尼黏度、Payne效应和基本力学性能影响较大,但对疲劳寿命和耐磨耗性能的影响不明显,薄通15次胶料的门尼黏度、Payne效应和基本力学性能明显下降;密炼结合开炼机低温薄通工艺的混炼效果优于普通密炼机一段混炼工艺的混炼效果。 相似文献
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以全钢载重子午线轮胎0°带束层胶料混炼为例,对IM550E/IM1000ET重型串联密炼机与传统BB620型密炼机的混炼工艺性能进行对比研究。结果表明:与BB620型密炼机相比,IM550E/IM1000ET重型串联密炼机一段混炼生产效率低12.5%,门尼粘度高19.3%;二段混炼生产效率高3.1%,二段混炼胶比一段混炼胶门尼粘度下降幅度增大31.6%,炭黑分散性下降。串联密炼机生产混炼胶门尼粘度适宜,胶料的定伸应力、拉伸强度和拉断伸长率等物理性能提高,钢丝帘线粘合性能提高,加工性能更稳定。 相似文献
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基于低温混炼原理,利用自行设计研发的串联式连续混炼设备对炭黑配方胶料进行低温高分散混炼,该方法在保证基体胶和配合剂准确配比的前提下,实现了块状橡胶在135℃以下的低温连续混炼,从而在一定程度上保证了橡胶大分子链的完整性。本文通过实验探究了串联式连续混炼设备中连续混炼系统转子转速和连续混炼停留时间对于混炼胶质量的影响,结果表明:当连续混炼系统转子转速为30 r/min、停留时间为186 s时,所制备的混炼胶综合性能最好;同时将串联式低温连续混炼与密炼机高温混炼法相对比,发现前者制备的炭黑配方胶料分散度高、加工性和综合物理机械性能好,证明了其对炭黑配方胶料混炼具有较好的适用性。 相似文献
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本文论述了混炼参数对白炭黑填充胶料性能的影响,并对那些能够改善硅烷化反应效率的因素和装备有现代化啮合式转子的密炼机的混炼性能进行了论述。对这种最新型的啮合式转子对白炭黑填充胶料混炼反应的功效进行了研究。 相似文献
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Most numerical simulations of the flow in an internal mixer are based on the assumption that the internal mixer is totally filled with rubber compounds. However, in fact, the internal mixers are only partially filled with rubber compounds, thus posing many challenges for researchers in simulating the flow in the internal mixer. In this study, the volume of fluid method and the dynamic mesh technology of commercial CFD software FLUENT were used to simulate the flow of rubber compound in a partially filled internal mixer. To improve simulation accuracy, every 18 degrees in circumferential direction, we manually re‐meshed the calculated transient location of the rubber compound. Thus, we obtained the transient distribution of the rubber compound in the internal mixer as the rotors rotated. The simulation results showed that voids were mainly located behind the rotor blades, and there were material exchanges in the bridge regions between the two chambers. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42496. 相似文献
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This paper deals with the measurement and interpretation of pressures and temperatures produced by the mixing of a rubber compound in the chamber of an internal mixer equipped with interlocking rotors. Pressure transducers and infrared/fiber optic temperature sensors were sited flush with the inner surface of the mixing chamber of a Francis Shaw KO Intermix of 2 L chamber volume. The variation of pressure with transducer position In the chamber wall and with rotor position was measured for selected fill factors and rotor speeds at “equilibrium” conditions (quasi-static power requirement for the mixer) and at intervals during a complete mixing cycle. Two rotor designs were studied. Interpretation of the results was carried out with reference to biconical rotor rheometer measurements on the mixed rubber compounds and by reference to four regimes of viscoelastic behavior identified for two-roll mill mixing. A basic flow analysis was carried out by use of the lubrication approximation in conjunction with an isothermal power-law model. 相似文献
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混炼设备的发展经历了大致三个阶段开炼机,密炼机和连续混炼机.目前橡塑工业正向着大型化、自动化、连续化发展,连续混炼受到人们越来越多的关注.双转子连续混炼机在我国是一种新兴的连续混炼设备,它既能连续工作,又保持了密炼机优越的混合特性,可以在很宽的范围内完成对物料的混合造粒任务,对它的研究正在逐步开展起来. 相似文献
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采用新型变间隙转子混炼短纤维/橡胶复合材料 总被引:3,自引:0,他引:3
分析短纤维/橡胶复合材料的混炼机理,针对短纤维胶料混炼特点设计新型变间隙六棱同步转子。转子棱峰与密炼室内壁间隙影响短纤维在胶料中的混合和分散以及混炼胶中短纤维的长度。新型六棱同步转子采用变间隙设计,大间隙有助于短纤维的混合,小间隙有助于短纤维的分散。采用新型六棱同步转子可改善短纤维/橡胶复合材料的混炼质量和性能,并能够提高生产效率。 相似文献