真空应用对压榨脱水和能源消耗的影响

压榨毛毯是造纸机的贵重物品,真空吸水箱的真空脱水和压区脱水决定纸张出压榨部的干度,真空度和压榨压力是能耗的重要指标,最大限度地降低能耗,增加脱水是压榨部的迫切要求。     

铝铸轧板形控制技术及应用初探

通过剖析影响铸轧板形的工艺过程及相关设备的重要技术特性,探讨了有效控制板形的技术途径.     

Woven Surface and Form

The Advanced Geometry Unit (AGU) at Arup, founded by Cecil Balmond and Charles Walker, has become synonymous with a highly mathematical, topological approach to architecture. It has, however, collaborated on some of the most exciting experimental fabric structures of recent years, including Anish Kapoor's Marsyas at Tate Modern and Rem Koolhaas's Cosmic Egg at the Serpentine Gallery. Here, the unit's Tristan Simmonds, Martin Self and Daniel Bosia describe how the AGU has progressed research into textile techniques that encompass tailored biomorphic forms alongside knot diagrams. Copyright © 2006 John Wiley & Sons, Ltd.     

圆锥破碎机腔形研究

为开发圆锥破碎机新型层压曲线腔形,基于分层破碎,提出固定质量原则,引入工态啮角,并成功应用于圆锥破碎机腔形的开发研究。基于固定质量原则和工态啮角,建立了圆锥破碎机曲线腔形设计模型,提出了曲线腔形设计新方法,建立了圆锥破碎机曲线腔形多目标优化设计模型,为自主研制开发新型、高效、节能的现代高能圆锥破碎机奠定理论基础。研究成果已应用于破碎机生产厂家,研制了相应物理样机,经物理样机实验验证了腔形优化设计模型的可行性和可靠性。
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OptiReel卷取机的应用及运行经验

介绍了OptiReel卷取机的工作过程及其控制手段,分析了一些生产中常见问题产生的原因,并提出了处理方法.     

探讨SDS型假捻变形机中的拉伸机构

通过对SDS型假捻变形机中拉伸机构的原理和结构的分析,阐明了拉伸机构各零件与DTY质量的关系,提出了提高DTY质量的方法和措施。同时介绍了A802A型塑胶磨床的技术改造。     

Washboarding and print quality of corrugated board

This paper is a concluding survey of the research presented in three previous reports by the author. It deals with the problem of washboarding, which is the wavy pattern coinciding with the flute tips on the surface of corrugated board. The causes of washboarding on the surface of corrugated board have been determined and the effect of washboarding on the print quality of corrugated board has been studied and discussed. Measuring equipment for quantifying washboarding has been developed. Which has a non-contact, optical measuring device which measures the distance to a corrugated board sheet with an accuracy of 1 μm. The effects of paper properties and process and converting conditions on the degree of washboarding were studied and the effects of the degree of washboarding on the appearance of the unwanted stripes in flexo print (so called printed stripes) has been analysed. The main influencing factor for washboarding to occur on corrugated board surfaces is the amount of glue between the liner and the fluting. The more glue, the more washboarding. The liner grammage is also important; a high liner grammage decreases the degree of washboarding and a low fluting grammage decreases the washboarding. The degree of washboarding influences print quality to a surprisingly low extent, contrary to what has been claimed before, with other parameters influencing the printed result much more. The distance between the plate and the pressure roll (the print nip) and the ratio between the stiffness in the thickness direction of the board and the printing plate, influence quality print dominantly. The type of print, i.e. half-tone or full-tone, also influences print quality. It is not possible to get perfect printing results in both half-tone and full-tone prints when using the same inking station. To avoid printed stripes on half-tone areas one should increase the print nip, decrease the fluting stiffness and/or increase the plate hardness. To avoid printed stripes on full-tone areas one should do the opposite: decrease the print nip, increase fluting stiffness and/or decrease plate hardness. © 1998 John Wiley & Sons, Ltd.     

Mill processability of brominated isobutylene‐co‐paramethylstyrene and its blends with EPDM

Milling behavior of brominated isobutylene‐co‐paramethylstyrene (BIMS) and its blends with ethylene propylene diene terpolymer (EPDM) rubber, was investigated over a range of temperatures and friction ratios in a drop mill operation. BIMS showed striking changes, that is, from a loose nervy band to a tight elastic band, as the temperature of the rolls was increased from 30°C to 90°C. For EPDM a loose band was observed at all temperatures and friction ratios studied. For the blends of BIMS and EPDM, the milling behavior changed from a tight elastic band to a loose bagging band on increasing the EPDM content. The critical nip gap (CNG), at which the front‐to‐back roll (F–B) transition occurred, was also measured. BIMS showed a much higher value of CNG than that of EPDM, indicating that the former had a significantly higher tendency for F–B transition than the latter material. For different blends of BIMS and EPDM, the CNG decreased on increasing the EPDM content, indicating a decrease in the tendency for F–B transition. The results were explained in terms of the rubber‐to‐metal adhesion and the viscosity of the polymers. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 1483–1494, 2001     

扬克缸压辊胶面损坏原因探析

利用压区压印试验介绍了高温下扬克缸光泽压光辊覆面易损原因,并探索了解决问题的最佳方案。     

纵向变截面轧制过程中的轧制参数

 基于纵向变截面轧制的特点,根据轧件受力分析了LP钢板轧制过程的咬入角和咬入条件。利用前滑的定义推导出纵向变截面轧制的前滑模型,通过离散化处理得到工程应用的纵向变截面轧制楔形区的前滑公式。以LP钢板轧制实例,对仿真和模型计算结果进行了分析比较,验证了理论公式的正确性,为LP钢板的轧制提供了理论依据。