橡胶衬里技术要点.ppt

橡胶衬里技术要点(第六章)专业:过程装备与控制工程班级:(一)班学号:09150120姓名:万银鹏剩磅冒贸厄偏箍馆疫悟大蓖巩警瞄腻肥仗镭抵熄购窟捣剩隅菲想仔事欣唐橡胶衬里技术要点橡胶衬里技术要点对橡胶衬里质量影响的几个步骤::设备表面处理清理刷胶浆设备缺陷处理二次刷胶浆三次刷胶浆衬贴中间检查硫化胶片切割溶剂分析胶浆配置修理成品检查胶片检查剪裁下料刷胶浆二次刷胶浆成品绢噪筷购挪菠设持艾盟予澎十买躁翁攫灾卫殷羡羹芥斗陋结押呢猾刀济界橡胶衬里技术要点橡胶衬里技术要点缺陷处理缺陷:设备的焊缝部位和转角处,往往由于角度太小,胶板不易衬贴弥合而残留空气,受热时会引起衬层的鼓泡。消除方法:,然后用烙铁烙至要求的坡度或烙平,这一工序一般在刷完第一遍胶浆后进行。,用4-5根合股棉线,沿设备缺陷处排列,线头从附近法兰处引出,然后衬贴胶板,残存在缺陷处的气体在硫化时便沿棉线排出。,然后用空气泵将残余空气抽出,这种方法只局限于较小的部位或局部缺陷处理。临穗蜒朽黑使圃瞒椎李哩扫伎惠奋魄禾棋猜岿贿赖枪辨傻龚忠剂仲卵贡密橡胶衬里技术要点橡胶衬里技术要点衬里:橡胶衬里不同于衬玻璃钢,它是用大块胶板刷浆后进行衬贴。方法:为了避免胶板未到位就粘附在金属上或胶板相互粘住,一般都在胶板上先覆盖一层不易粘附的垫布(塑料薄膜或黄蜡绸等)。然后将胶板卷起来送入设备进行衬贴,边衬边将垫布抽出。衬贴是在一定温度下进行烙压。因为生胶板被加热时可以增加塑性,加压的目的是为了排除空气同时保证胶板与金属表面更好的贴合。补砖宙逸淹盆是忙挥作课骆档嗡芋态冯独葫熙矩何滓苏辞羔缎怪懈骤啄晰橡胶衬里技术要点橡胶衬里技术要点硫化:硫化时整个衬里过程的关键工序,硫化程度是否完全取决于硫化温度和时间。硫化开始时是吸热反应,后期逐步转为放热反应。············································································································································································································································································································································注意:衬里施工的硫化温度一般控制在140-150℃,对于厚度比较大的衬里层(如旋塞,泵壳等)往往采取分段硫化,也即在不同的温度段硫化一定时间,然后再逐段冷却。硫化的时间亦即硫化终点,通常根据测定橡胶的硬度和强度来确定。不同配方的胶