很(hen)多小電(dian)泳(yong)(yong)(yong)(yong)加(jia)工(gong)廠都沒有專用(yong)的(de)加(jia)料系(xi)統,色漿(jiang)乳液(ye)助劑(ji)(ji)等都是人工(gong)加(jia)入(ru)(ru)(ru)槽(cao)(cao)(cao)中。建議乳液(ye)可以直接加(jia)入(ru)(ru)(ru)電(dian)泳(yong)(yong)(yong)(yong)槽(cao)(cao)(cao)中,加(jia)色漿(jiang)時一定(ding)(ding)要(yao)慢(man),且加(jia)入(ru)(ru)(ru)色漿(jiang)的(de)位置(zhi)最好靠近循環泵(beng)的(de)吸口。對于(yu)溶劑(ji)(ji)、中和(he)劑(ji)(ji),如果UF水洗槽(cao)(cao)(cao)有往(wang)電(dian)泳(yong)(yong)(yong)(yong)槽(cao)(cao)(cao)溢流的(de)開口,應加(jia)入(ru)(ru)(ru)UF槽(cao)(cao)(cao)中再(zai)回流回電(dian)泳(yong)(yong)(yong)(yong)槽(cao)(cao)(cao)。如果直接加(jia)入(ru)(ru)(ru)電(dian)泳(yong)(yong)(yong)(yong)槽(cao)(cao)(cao),需要(yao)用(yong)純水稀釋(shi)到20%左(zuo)右再(zai)加(jia)入(ru)(ru)(ru)槽(cao)(cao)(cao)液(ye)中。此外,往(wang)電(dian)泳(yong)(yong)(yong)(yong)槽(cao)(cao)(cao)或(huo)UF中補加(jia)中和(he)劑(ji)(ji)時,一定(ding)(ding)要(yao)少量(liang)多次(ci),加(jia)入(ru)(ru)(ru)時應提前稀釋(shi)好,以避(bi)免短(duan)時間(jian)內中和(he)劑(ji)(ji)加(jia)入(ru)(ru)(ru)量(liang)過大局部PH值過低導致電(dian)泳(yong)(yong)(yong)(yong)樹脂(zhi)析出(chu)、漆膜返溶。
如果電泳加(jia)工廠安裝有專用的加(jia)料(liao)系統(tong),加(jia)料(liao)泵建(jian)議采(cai)用氣(qi)動隔膜泵;乳液、色漿的加(jia)料(liao)入(ru)口可(ke)以直(zhi)接開在循(xun)環泵的吸口管路上,溶劑(ji)、中(zhong)和劑(ji)需要有專用的加(jia)料(liao)管路至UF槽循(xun)環吸口管路。
小型電泳(yong)加工工藝流程(cheng)設(she)計介紹
在小型電泳涂裝(zhuang)線(xian)的設(she)計(ji)階段(duan),建議(yi)必(bi)須保證基本工藝要求。
以下(xia)(xia)基(ji)本(ben)工藝(yi)流(liu)(liu)程建議不可(ke)減(jian)少(shao):上線前預處理(li)(除重油重銹(xiu))-預脫脂(浸)-脫脂(或(huo)脫脂、酸洗(xi)(xi)(xi)(xi)(xi)二合一)-水(shui)洗(xi)(xi)(xi)(xi)(xi)-水(shui)洗(xi)(xi)(xi)(xi)(xi)-表調-磷(lin)化(hua)-水(shui)洗(xi)(xi)(xi)(xi)(xi)-水(shui)洗(xi)(xi)(xi)(xi)(xi)-新鮮純水(shui)噴淋水(shui)洗(xi)(xi)(xi)(xi)(xi)-電泳-UF水(shui)洗(xi)(xi)(xi)(xi)(xi)-水(shui)洗(xi)(xi)(xi)(xi)(xi)-噴淋水(shui)洗(xi)(xi)(xi)(xi)(xi)-下(xia)(xia)線(晾(liang)干或(huo)吹水(shui))-烘干。只有保證了基(ji)本(ben)工藝(yi)流(liu)(liu)程,才能得到(dao)基(ji)本(ben)合格的電泳漆(qi)膜。例如:減(jian)少(shao)脫脂次數(shu),則容易(yi)導(dao)致縮孔(kong);減(jian)少(shao)磷(lin)化(hua)后水(shui)洗(xi)(xi)(xi)(xi)(xi)次數(shu),則容易(yi)導(dao)致串液引起的電泳槽液受到(dao)污染,導(dao)致針孔(kong)、擊(ji)穿等弊病;減(jian)少(shao)電泳后水(shui)洗(xi)(xi)(xi)(xi)(xi)次數(shu),則容易(yi)導(dao)致干漆(qi)跡或(huo)出現二次流(liu)(liu)痕等。