汽车用精密橡胶密封件项目通过国家验收

由中橡集团西北橡胶塑料研究设计院承担的“863”计划项目———“汽车用精密橡胶密封件的研制与开发”经过 3年的研制与试验 ,终于获得成功 ,并在北京通过了国家级项目验收。　　该项目是橡胶制品行业列入新材料领域的国家“九五”重点课题 ,包括了汽车制动系统、减震系统和发动系统三大关键系列橡胶密封件 ,填补了国内不能生产高档汽车关键橡胶密封件的空白 ,达到国际先进水平 ,完全符合国际标准。该项目的完成既为高档汽车关键橡胶密封件的国产化创造了条件 ,又将促进我国橡胶制品行业向高水平发展。汽车用精密橡胶密封件项目通过国家验…     

橡胶密封件自动扩孔装置

<正>授权公告号:CN 104070670B授权公告日:2017年1月25日专利权人:南通大地电气股份有限公司发明人:王小江、仇晓庆、周国峰等本发明公开一种橡胶密封件自动扩孔装置的设计。该装置主体为设有扩孔器的机架。扩孔器下臂固定在机架上,扩孔器上臂通过固定螺栓与连接块相连,连接块连接气缸(气缸连接控制阀,     

关于橡胶密封件生产中胶料流动性问题的探讨

本文针对橡胶密封件生产中胶料流动性存在的问题进行了研究。提出了一些实用的解决办法,实践证明这些方法是行之有效的。     

用于高效生产汽车橡胶密封件的模具系统

本实用新型公开了一种用于高效生产汽车橡胶密封件的模具系统,所述模具包括有橡胶软胶物料进口、橡胶物料进口、金属物料进口、产品出口和机头口模型,所述橡胶软胶、橡胶、金属三种材料通过机头口模块形成橡胶密封件;橡胶软胶物料进口与所述机头口模型之间形成有第一通道;橡胶物料进口与所述机头口模型之间形成有第二通道;金属物料进口与所述机头口模型之间形成有第三通道;所述橡胶软胶物料进口、橡胶物料进口、金属物料进口分别与自动供料系统相连;所述自动供料系统中还包括有复合灭菌系统。     

橡胶密封件生产工艺与质量检测

因其密封件几何形状简单,使用方便,广泛被采用运用到各流体系统中。生产橡胶密封件的厂家逐步形成完整的设计、加工体系,但密封件的生产工艺过程繁琐,质量性能检测不容忽视,本文针对生产工艺过程及其成品的质量检测进行梳理,在关键工序容易出现的质量波动进行预控,以求对密封件的质量有所保证。     

橡胶密封件生产工艺及装备概述

介绍了橡胶密封件生产工艺、主要装备及其技术性能,结合引进国外的一些设备,说明目前世界上橡胶密封件加工的先进水平,这对调整我国密封件生产结构,再造发展优势,提供了许多有益的启示。     

当前精密橡胶制品生产的问题与对策

当前精密橡胶制品生产的问题与对策南京橡胶厂李文佐，王福春随着我国汽车工业及家用电器工业的发展，精密橡胶制品需求量与日俱增。但从我国目前橡胶制品行业生产状况来看，产品的质量和精度远远满足不了汽车及电子工业的发展需要，表现在整机上泄漏、不可靠、寿命短。这...     

Designing environment-friendly chromium-free Spinel-Periclase-Zirconia refractories for Ruhrstahl Heraeus degasser

Ruhrstahl Heraeus (RH) degassers are globally used to manufacture vacuum-treated steel for automotive and railroad applications. The state-of-the-art environment-friendly chromium-free alternatives for direct-bonded magnesia-chrome refractories used in RH degassers are expensive, and the scientific literature lacks direct correlation between materials chemistry, processing, and functional properties. We have designed a novel spinel-periclase-15 wt% ZrO₂ composition containing 14 wt% in situ spinel which exhibited 7.2 MPa hot modulus of rupture (1500℃), exceeding all reported Cr-free refractories for RH degasser applications. Investigation with scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS) attributed this improvement to a reduction in interparticle Ca and Si content which forms low-melting phases, as supported by FactSage thermodynamic simulations. The spinel-periclase composition SP exhibited superior thermal shock resistance because thermal shock-induced cracks were stopped by fracture porosity around MgO particles, formed due to thermal expansion mismatch. SEM-EDS analysis of the SP composition corroded by RH slag at 1650°C revealed that Fe is the most corrosive element followed by Ca and Si. Contradicting the consensus, it was observed that corrosion resistance of fused MgO was better than that of ZrO₂. The cubic ZrO₂ phase reduced FeO_x penetration locally by incorporating CaO from the RH slag into a solid solution and forming a CaZrO₃ phase creating a “slag barrier”. Lastly, pore size was found to greatly exacerbate slag penetration following the Washburn percolation model.     

Three bond modes of basic refractories used for Ruhrstahl Heraeus degassing process

Magnesia–spinel brick and unburnt periclase–spinel–Al brick are being employed as a substitution of traditional magnesia–chrome brick in the chromium-free campaign of lining materials in Ruhrstahl Heraeus (RH) degasser. These three materials are investigated, in terms of physical properties, corrosion resistance and flexibility by wedge splitting test. Tracking their physical alterations and chemical reactions through burning or heating, three bond modes are discovered. Magnesia–chrome brick is subject to a series of phase transformation with rising temperature to yield a liquid envelop around chromite-ore particles, to further form porous rim while liquid is gradually absorbed by surrounding magnesia and eventually to precipitate secondary chromite spinel lied between magnesia particles by thoroughly dissociating chrome ore. The precipitated chromite spinel functions as the featured bond that enhances hot strength and corrosion resistance to slag, and additionally liquid coexistence improves the flexibility. The direct bond mode of magnesia particles in magnesia–spinel brick endures slag penetration by immanent character of MgO. Spinel incorporation in magnesia effectively improves thermal shock resistance. Due to minor negative value of permanent linear change after reheating, further sintering (densifying) in using at high temperature would bring a risk of loosening and open joints of magnesia–spinel lining. While used in RH degasser, unburnt periclase–spinel–Al bricks undergo a miraculous process of metallic Al melting, gaseous AlN and AlON formation, MgAlON whiskers germination combined with gaseous Mg reduced, and micron-size whisker network bond domination in their matrix. Such a whisker-network bond renders the material a successful eco-friendly alternative to magnesia–chrome refractory.     

塑料的高效焊接--采用贺利氏特种光源公司的红外辐射器

贺利氏特种光源集团是世界著名的贵金属材料和技术企业——贺利氏控股集团下属的事业部之一。已多次在德国、英国及中国举办的大型橡塑行业展览会上展示其能够优化能源应用的红外辐射器。这种针对客户设计的红外辐射器具有可针对性加热的优点：即只加热需要加热的部位。且对加热时间能实现精确的控制。因而，能源得到了有效利用。加工时间被缩短，最终生产成本被大大节省。     

贺利氏红外干燥技术提供快速的塑料按键盘涂层的固化

很多家用电器的塑料按键盘都是经过注塑成型、印刷、涂保护层、干燥固化等工序来生产的。在很多情况下，这些透明涂层是在热风炉里干燥的。不幸的是，这样的干燥需要时间很长，甚至20多min。在此期间，灰尘就很容易附着在涂层表面，造成残次品。另外，热风炉占地大、投资大、开关很慢等等问题造成成本高、速度慢。     

Infra-red absorption spectra of ion-exchange resins

Infra-red absorption spectra have been obtained by the KBr disc technique for some fifty commercial ion-exchange resins with quaternary ammonium, tertiary and mixed amine, sulphonic, phosphonic, secondary phosphate, and carboxylic groups, as well as for a number of experimental resins, including some of the solvent-modified type. The use of the technique in structural characterisation of ion-exchange resins is discussed.     

Infra-red investigation of sulphonated EPDM polymers

Infra-red investigations have been conducted on a sulphonated ethylene propylene diene monomer system (sulpho EPDM) wherein the sulphonate is neutralized with various monovalent and divalent cations. Analysis of these systems was conducted on thin polymer films which were also analysed in spectra from which the unfunctionalized EPDM contribution was subtracted. These studies have revealed that the interaction of cation and sulphonated polymer differs for each cation, and some conclusions have been drawn regarding the symmetry of the cation-sulphonate complex. Surprisingly, the functionalization process induces ordering of the methylene groups in a trans fashion in the solid ionomer. The degree of ordering depends on the specific cation suggesting, for the first time with these polymers, that the ionic aggregation induces an ordered rearrangement of the polymer chains. The ordering in these systems disappears after prolonged heating, suggesting that thermal relaxation of the ionic aggregate destroys the order in the polymer chains.     

Infra-red spectra of perfluorinated cation-exchanged membranes

Assignment of the i.r. spectrum of Nafion cation exchange membranes was made possible by use of i.r. absorption and reflectance (ATR) spectroscopy. Shifts in the water and sulphonic vibrations occurring upon exchange of various counterions were compared with those occurring in a polyethylene sulphonic acid and polystyrene sulphonic acid membrane. The type of binding of the cations and the possibility of cluster formation are discussed. A dimeric iron unit FeOFe was identified in the Nafion membrane.