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输送带热硫化接头部位橡胶比较硬的原因

发布者:admin  发布时间:2017-06-13  点击:1495 www.reptiliacs.com
我们对输送带实现接头后,会是经常发现接头部位比其他的部位要硬,输送带硫化胶接的过程实际上也是了已硫化橡胶继续交联的过程。由于是硫化时需要加温、加压,并且是需要比较长的时间,经过了比较长时间的硫化后,已经硫化橡胶的硬度是会提高,因此会是感到接头部位比其他部位硬。输送带接头处的强度是比正常带体的强度要低。一般是用机械方式连接时,接头强度仅能达到带体强度的40-50%,冷胶方式质量比较好时,接头强度能达到60-70%,而热胶接头强度能达到80-90%(接头方法正确、无质量缺陷)。由于接头部位的强度比较低,如果胶接方法不正确,接头的强度就会更加低,如开刀、打磨时伤及下一层布、打磨过度、搭接长度不够、台阶个数不够、胶接头所用橡胶性能不好或已经自硫失效、钢丝绳打磨过度、钢丝绳生锈等,接头部位的强度将会大打折扣,在使用时,容易出现接头部位断开的现象。此外,输送带如果不采用封口胶、或胶接头的方向错误时,接头部位容易出现开裂(面胶部位)。

After we realize the belt conveyor, we will often find that the joint site is harder than the other parts. The process of vulcanization of the conveyor belt is actually the process of continued crosslinking of the vulcanized rubber. Because it is the need of heating and pressurizing vulcanization, and takes a relatively long time, after a relatively long time after vulcanization, already vulcanized rubber hardness is increased, so feel joints than other parts of the hard. The strength at the joint of the conveyor belt is lower than that of the normal belt. The general is connected by mechanical means, the joint strength can only reach 40 - 50% with body strength, cold glue quality is better, the joint strength can reach 60 - 70%, while the intensity of the hot glue joint can reach 80 - 90% (joint method is correct, no quality defects). The joint strength is relatively low, if the bonding method is not correct, the joint strength will be more low, such as surgery, abrosive and a layer of cloth, excessive grinding, lap length is not enough, the step number is not enough, rubber joints with rubber performance is not good or has been since sulfur failure, excessive grinding, wire rope the wire rope rust, joint strength will be greatly reduced, when in use, easy to appear the phenomenon of broken joints. In addition, if the conveyor belt does not use sealing glue, or the direction of the rubber joint is wrong, the joint parts are prone to crack (surface rubber parts).
    
 
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