共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
分析采用两鼓成型机胶囊成型鼓生产的全钢载重子午线轮胎在成型过程中产生胎侧耐磨胶打褶的原因,并提出相应解决措施。通过采取使用表面深度为0.5 mm的网格状胶囊、根据轮胎规格调整成型鼓反包胶囊扣胎圈后的预充气压力、确保成型鼓反包胶囊与助推胶囊充气后胎圈外侧的帘布端点和钢丝包布端点直立以及反包臂摆入后反包轮的落点与成型鼓扇形块膨胀撑起后表面的距离控制在2~5 mm等措施,有效解决了全钢载重子午线轮胎两鼓成型机上胎侧耐磨胶打褶问题。 相似文献
3.
4.
5.
6.
7.
8.
9.
10.
介绍全纤维农业子午线轮胎的成型工艺及施工设计特点(采用无胶囊反包装置、无带束层贴合鼓、无传递环的普通农业子午线轮胎成型机)。一段成型时帘线均匀伸张及胎圈部位的成型质量是保证二段胎坯充气后尺寸均匀性的关键;胎体帘布采用层贴法;气密层采用2层,总厚度为2~4 mm,成型时加以适当的张力以与成型鼓面贴紧,保证成型鼓面光洁度高;成型鼓直径与钢丝圈直径差值为60~80 mm,钢丝圈与三角胶粘合牢固,用包布固定最佳,三角胶硬度适当减小;使用胎圈护胶和胎圈包布,且胎圈护胶、胎侧胶、胎肩垫胶最好采用复合挤出、整块成型贴合;带束层贴合后应适当伸张后再滚压;胎面缠绕直径需要修正,实际值比理论值大5~12 mm。 相似文献
11.
苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况,合成乙苯,苯乙烯所用的催化剂种类,并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。 相似文献
12.
Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile
Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, 13C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc. 相似文献
13.
14.
G. R. Hamed 《The Journal of Adhesion》1983,16(1):31-39
A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength. 相似文献
15.
The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu3Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu3Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters. 相似文献
16.
17.
18.
责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体. 相似文献
19.