密炼机混炼过程功率曲线的作用*

密炼机橡胶混炼过程功率曲线,在根据密炼机混炼流变理论赋予其新的物理意义后,其主要作用有：根据功率曲线图形可判明该混炼是否符合规程的要求,并可发现某些异常现象;根据曲线图形可判明工艺的好坏,并可提供改进的途径;运用曲线图形研究混炼工艺,更直接、更快速、更准确;可预测混炼胶的粘度和分散度。     

XHM－140／20型密炼机中胶料混炼工艺分析

应用密炼机中胶料混炼和流变理论，采用ＭＧＫＪ密炼机微机监控系统对混炼过程进行监测。对混炼过程功率曲线和有关参数进行统计分析，建议在整个混炼过程中控制好三点：加填料的ａ点，结束混炼的ｅ点和扫粉的ｄ点。建议在现有设备和新建设备上采用先进的ＭＧＫＪ密炼机微机监控系统。     

密炼机中橡胶混炼的流变理论及应用

介绍了密炼机中橡胶混炼的流变理论,即混炼的主要阶段胶料呈粘弹性流体,胶料的混炼工艺主要由胶料粘度决定,胶料达到最佳粘度时,混炼工艺最优。密炼机功率曲线反映了密炼室中胶料的混炼状态,通过功率曲线可以分析判断胶料的混炼工艺情况,根据密炼机中橡胶混炼的流变理论,开发了MLJ－300型密炼机微机智能控制系统,该系统可以对混炼工艺进行自动或半自动优化,根据胶料配方和 炼机性能可建立混炼 炼机性能可建立混炼胶质量预测数学模型,包括粘度和分散性预测数学模型,采用预测数学模型控制生产,可保证每批混炼胶质量达到要求,实现密炼机的高效优质生产。     

XHM-140／20型密炼机中胶料混炼工艺分析

应用密炼机中胶料混炼和流变理论，采用ＭＧＫＪ密炼机微机监控系统对混炼过程进行监测。对混炼过程功率曲线和有关参数进行统计分析，建议在融洽上混炼过程中控制好三点：加填料的ａ点，结束混炼的ｅ点和扫粉的ｄ点。建议在现有设备和新建设备上采用先进的ＭＧＫＪ密炼机微机监控系统。     

橡胶密炼机混炼工艺瞬时功率控制法

橡胶密炼机混炼工艺瞬时功率控制法的理论由３部分组成：橡胶混炼过程的机理、密炼机流理论和混炼过程功率曲线与能量控制法不同，瞬时功率控制法实质上是控制混炼过程中胶料的粘度，确保混炼工艺过程保持最佳状态。因而瞬时功能控制法可监控生产过程，为密炼机混炼工艺的智能控制奠定了基础。     

用混炼功率曲线控制混炼胶质量

介绍混炼功率曲线在控制和改善混炼胶质量方面的应用。混炼功率曲线可以用来查看密炼机功率消耗、了解橡胶混炼过程,除可显示混炼各阶段的进展情况外,还能在一定程度上表征混炼胶料各组分的分散效果。通过分析功率曲线,在改进加油点、密炼机填充因数和排胶时间后,使混炼周期缩短,能源消耗降低。     

功率曲线在密炼机混炼工艺中的应用

密炼机是橡胶厂中炼胶的主要设备,人们为了不断提高密炼机混炼效率,改善炼胶质量,节约能量而不断地完善混炼工艺和改进控制方法。我们对密炼机功率曲线的研究,正是从这种需要出发的。我们曾经指出[1]:功率曲线不仅是混炼能量消耗的记录,而且是密炼机操作控制情况和混炼状态的反映。本文是在过去工作的基础上,进一步分析混炼功率曲线与密炼机工作原     

用功率曲线控制密炼机排胶的实验分析

用功率曲线控制密炼机排胶的方法是控制密炼机混炼工艺过程的方法之一。它是通过功率曲线的变化，来控制混炼及排胶过程。与现在使用的时间、温度和能量控制法有明显的区别。采用功率曲线控制，可以有效地排除人为因素、材料差异等干扰，从而保证各批料之间混炼质量的重现性和均匀性。     

XM-2.4L型密炼机控制系统

简要介绍了XM-2.4L型密炼机混炼过程中功率曲线的重要性以及密炼机的参数、结构、控制系统的组成、控制步骤以及改善混炼工艺的优化方法。采用XM-2.4L型密炼机控制系统可使混炼工艺保持最佳的状态，混炼胶质量均一，而且操作，控制和维修非常方便。     

氟橡胶密炼机混炼加工工艺研究

设计两种密炼机混炼工艺对氟橡胶进行混炼,利用密炼机混炼功率曲线分析混炼效果,并与开炼机混炼工艺进行对比,试验结果表明,开炼机混炼过程生热量大、易粘辊、操作困难,劳动强度大且生产效率较低;密炼机普通橡胶混炼工艺与先投炭黑再投小料等的混炼工艺相比,二者混炼效果相当,而后者更节省时间.3种工艺硫化胶物理性能相当.     

MLJ—200型密炼机微机智能控制系统

介绍了MLJ－300型密炼机微机智能控制系统的主要作用;根据混炼过程功率曲线可初步分析判断现有混炼工艺的优缺点,具有全自动和半自动优化混炼工艺的作用;可在每批混炼胶混炼结束时给出混炼胶粘度（塑性值）和分散度的预测值,并可在预测的基础上实现控制,从而全部达到质量指标,控制系统对控制对象开放和控制过程的模糊设定方便了用户,提高了自动控制率。     

橡胶混炼质量的影响因素及改进方法

从混炼工艺和混炼设备两个方面分析橡胶混炼质量的影响因素及改进方法。改善混炼工艺如采用高速或变速混炼工艺、低温一次法混炼工艺等可以提高混炼胶性能的稳定性和生产效率;调整湿法混炼喷射压力,在白炭黑胶料混炼过程中加入干冰,外加适当功率及时间的超声波作用辅助混炼可以提高配合剂的分散性和混炼胶的综合性能;对混炼设备内表面进行良好的涂层点焊,可以延长混炼设备的使用寿命,提高生产效率。这些方法对于提高混炼胶性能及生产效率,降低能耗和污染等具有突出的作用。     

用统计方法分析密炼机混炼过程瞬时功率对混炼胶可塑性的影响

为比较密炼机混炼过程的时间、能量消耗、瞬时功率对混炼胶可塑性的影响，采用统计方法分析，发现瞬时功率与胶料可塑性相关系数大，影响最显著。即在密炼机混炼工艺过程中，采用瞬时功率为控制参数最好。     

密炼机橡胶混炼工艺智能控制的设想

论述密炼机橡胶混炼工艺智能控制的重要性,自动控制只有智能化才能确保混炼工艺优良,质量合格,指出了智能控制的条件,内容和途径,采用瞬时功率控制法及其控制系统ＭＧＫＪ可实现混炼胶质量自动在检测和混炼工艺自动优化等单台密机混炼工艺的智能控制。     

Effect of adding different silane coupling agents on metal friction and wear in mixing process

The function of silane coupling agent in rubber mixing field is to combine inorganic matrix with rubber organic matrix. Silica is commonly used in the rubber mixing field to strengthen rubber. The size and amount of silica aggregates in the mixing process are important factors affecting the wear of the mixing chamber. The wear of the mixing chamber would lead to a increasing gap between the mixer chamber and the rotor, which caused the mixing efficiency reducing. It also affected the dispersion effect, then affected the mechanical and physical properties of the vulcanized rubber. In this paper, the effects of rubber compound on metal friction and wear were studied by using four silane coupling agents commonly used in rubber mixing field. The experiment was carried out at 15°C, and the attention should be paid to drying during sample preparation to avoid the deviation of the experiment caused by hydrolysis of silane coupling agent. The results showed that silanization reaction occured between silica and silane coupling agent in the mixing process. The mixing temperature was usually maintained at 145 to 155°C for 1 min in the mixer, and the silanization reaction rate was the fastest during this time. We took this rubber compound as the research object and studied the friction and wear of the rubber compound on the mixing chamber in the mixing process. The products of the silylation reaction are alcohol and water. This paper studies the corrosion and abrasion of the mixing chamber by water at high temperatures. In the mixing process, abrasive wear was the main wear form, but the corrosion wear caused by high temperature steam still occupied a large proportion.     

一次法混炼工艺研究及在胎面胶生产中的应用

试验研究一次法不同混炼工艺对胶料性能的影响以及实际应用中混炼工艺的稳定性。结果表明,胶料进入开炼机成环后先冷却再捣胶,其炭黑分散度和耐磨性能更好,炭黑结合胶也相对较多;使用硫黄母胶片的一次法混炼工艺稳定,胶料老化后的耐磨性能相对普通混炼工艺提高显著,胶料各项指标满足要求。     

LIR-50对NR/BR胶料混炼特性和力学性能的影响

研究了液体聚异戊二烯（LIR-50）对天然橡胶（NR）/顺丁橡胶（BR）混炼胶的混炼特性和硫化胶常规力学性能的影响.实验结果表明：LIR-50能有效地降低混炼时的能耗、最大功率和平衡功率,并能提高NR/BR硫化胶的定伸模量、硬度,断裂伸长率有所降低,而对其它力学性能影响不大.     

Studying the continuous wet mixing process based on the silica formula

Studies show that the mixing process is one of the most critical steps in the rubber processing, which directly affects the performance and service life of rubber products. However, unjustifiable complexity, high processing time, and low mixing quality of the conventional mixing technologies restrict the development of the rubber industry. Aiming at the deficiency of rubber mixing technology at present, the wet mixing technology and continuous mixing technology are complementary to each other, and the continuous wet mixing technology is developed. Then experiments are carried out to evaluate the performance of the proposed method. The obtained experimental results show that the wet mixing and continuous mixing technologies have synergetic effects, thereby simplifying the mixing process and improving the quality and continuity of the mixing process. It is found that the continuous wet mixing technology significantly improves the properties of the rubber compound compared with the conventional dry mixing method. The proposed method not only has reasonable processing properties but also significantly improves the physical, compressive fatigue, degree of dispersion and dynamic mechanical properties of the compound compared with those from the conventional dry mixing process.     

Preparation and mechanical properties of natural rubber powder modified by carbon nanotubes

A suspension of carbon nanotubes in natural latex was obtained by liquid mixing and then was used to prepare powder natural rubber composites modified with carbon nanotubes by means of spray drying process. The composite powders were round‐like and fine, with an average diameter of less than about 5 μm. The dispersion of carbon nanotubes in the rubber matrix was improved remarkably compared with that obtained by the mechanical mixing method. By means of vulcanization tests, it was found that the addition of vulcanizing agent necessary for the powder rubber containing carbon nanotubes should be evidently greater than that in rubber prepared by mechanical mixing, there evidently existed vulcanization reversions for the natural rubber prepared by mechanical mixing, which disappeared in the powder rubber containing carbon nanotubes prepared by the spray drying process. The mechanical properties of the powder natural rubber containing carbon nanotubes were much improved because of the modification effect of carbon nanotubes in rubber. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 4697–4702, 2006