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電泳漆包的改善與預防

發布時間:2020-11-06 08:49:14  瀏覽次數:



社會發(fa)展日(ri)新月(yue)異,汽(qi)車(che)(che)產(chan)銷(xiao)(xiao)量與日(ri)俱增,2019年中國汽(qi)車(che)(che)產(chan)銷(xiao)(xiao)量達2 572.1萬輛和(he)2 576.9萬輛。隨(sui)著新能(neng)源汽(qi)車(che)(che)在國內蓬勃(bo)發(fa)展,民族自主品牌欣(xin)欣(xin)向榮(rong),當(dang)前國內汽(qi)車(che)(che)行業正向著多元化、智能(neng)化、品牌化發(fa)展。汽(qi)車(che)(che)電(dian)(dian)泳(yong)(yong)防腐技術也(ye)隨(sui)之日(ri)新月(yue)異地發(fa)展推進,從福(fu)特公司使用(yong)的一代陽極電(dian)(dian)泳(yong)(yong)漆(qi)(qi)(qi)(qi)到目前主流(liu)七(qi)代電(dian)(dian)泳(yong)(yong)漆(qi)(qi)(qi)(qi),無(wu)論是材料(liao)還(huan)是規模(mo)上(shang)都(dou)有(you)巨大(da)(da)(da)變革。隨(sui)著環(huan)保問題(ti)日(ri)益(yi)凸顯(xian),排放標準要(yao)(yao)求日(ri)趨(qu)嚴格,開發(fa)使用(yong)高(gao)固低溶來(lai)替代原有(you)電(dian)(dian)泳(yong)(yong)漆(qi)(qi)(qi)(qi)成(cheng)為市(shi)場(chang)大(da)(da)(da)勢(shi)所趨(qu)。高(gao)固含(han)電(dian)(dian)泳(yong)(yong)漆(qi)(qi)(qi)(qi)可(ke)有(you)效(xiao)改善排放污染問題(ti)及電(dian)(dian)泳(yong)(yong)車(che)(che)身(shen)(shen)(shen)縮孔等(deng)品質問題(ti),提升車(che)(che)身(shen)(shen)(shen)防腐性(xing)(xing)能(neng),但因本身(shen)(shen)(shen)鈦白粉或高(gao)凝土含(han)量高(gao),易沉(chen)積形(xing)成(cheng)電(dian)(dian)泳(yong)(yong)漆(qi)(qi)(qi)(qi)渣。車(che)(che)身(shen)(shen)(shen)在整個電(dian)(dian)泳(yong)(yong)大(da)(da)(da)循環(huan)系(xi)統中運行,若表(biao)面(mian)(mian)黏附漆(qi)(qi)(qi)(qi)渣經(jing)過烘(hong)烤即會在車(che)(che)身(shen)(shen)(shen)表(biao)面(mian)(mian)形(xing)成(cheng)漆(qi)(qi)(qi)(qi)包缺(que)陷(xian),此為漆(qi)(qi)(qi)(qi)包產(chan)生(sheng)機理(li)。漆(qi)(qi)(qi)(qi)包缺(que)陷(xian)成(cheng)因影響因素較多,如電(dian)(dian)泳(yong)(yong)循環(huan)大(da)(da)(da)系(xi)統潔凈(jing)度(du)、生(sheng)產(chan)節(jie)奏、設(she)備匹配度(du)等(deng)方面(mian)(mian)均有(you)較大(da)(da)(da)影響。車(che)(che)身(shen)(shen)(shen)漆(qi)(qi)(qi)(qi)包缺(que)陷(xian)通常(chang)需(xu)要(yao)(yao)打磨處(chu)理(li),易造成(cheng)電(dian)(dian)泳(yong)(yong)層變薄,影響車(che)(che)身(shen)(shen)(shen)整體防腐性(xing)(xing)能(neng),當(dang)出現打磨漏底情況時必須補噴電(dian)(dian)泳(yong)(yong)修補防銹底漆(qi)(qi)(qi)(qi)。

隨著人(ren)們對(dui)汽車品(pin)質及性(xing)能的(de)(de)需求逐步提高,廣(guang)大消費者越(yue)(yue)來(lai)越(yue)(yue)關注車身(shen)(shen)防銹防腐問題。減少電(dian)泳(yong)(yong)(yong)涂層打(da)磨量是主機廠(chang)控(kong)制車身(shen)(shen)較(jiao)低(di)涂層厚度、降低(di)成(cheng)本(ben)并(bing)滿足車身(shen)(shen)性(xing)能的(de)(de)的(de)(de)必然需求,改(gai)善并(bing)預防電(dian)泳(yong)(yong)(yong)車身(shen)(shen)打(da)磨量較(jiao)大的(de)(de)漆包缺陷問題的(de)(de)重要性(xing)就不言而喻了。因(yin)此(ci),近年(nian)來(lai)有(you)許多學者研究電(dian)泳(yong)(yong)(yong)漆渣的(de)(de)改(gai)善,主要從(cong)電(dian)泳(yong)(yong)(yong)循環系統槽(cao)(cao)液(ye)參數、槽(cao)(cao)液(ye)循環狀態、電(dian)泳(yong)(yong)(yong)材(cai)料成(cheng)分、設備與(yu)現場匹配(pei)度等方(fang)面展(zhan)開,其(qi)中濕打(da)磨機、出槽(cao)(cao)高壓噴(pen)淋在(zai)國內部分汽車生(sheng)產(chan)(chan)廠(chang)家的(de)(de)批量化生(sheng)產(chan)(chan)中已獲得成(cheng)功(gong),但由于需要投入成(cheng)本(ben)較(jiao)高及其(qi)他方(fang)面的(de)(de)復(fu)雜性(xing),在(zai)國內大部分生(sheng)產(chan)(chan)線上還是很(hen)少應用(yong)(yong)。故在(zai)工(gong)業生(sheng)產(chan)(chan)中成(cheng)本(ben)低(di)、操作簡(jian)單、對(dui)環境(jing)要求較(jiao)低(di)的(de)(de)控(kong)制系統或方(fang)法倍受青睞,且具有(you)更(geng)高的(de)(de)使用(yong)(yong)率。

電(dian)(dian)(dian)泳(yong)漆(qi)(qi)包缺陷在雙擺(bai)桿(gan)線中十分(fen)(fen)常見,尤其是主(zhu)機廠實際產(chan)(chan)(chan)能(neng)(neng)與(yu)前(qian)期(qi)規(gui)劃(hua)產(chan)(chan)(chan)能(neng)(neng)差異較(jiao)大(da),生(sheng)產(chan)(chan)(chan)線經(jing)常處于無(wu)法(fa)滿足(zu)單班產(chan)(chan)(chan)量(liang)甚至(zhi)(zhi)經(jing)常出現無(wu)產(chan)(chan)(chan)量(liang)停線待(dai)產(chan)(chan)(chan)(新能(neng)(neng)源汽車大(da)規(gui)模增(zeng)擴產(chan)(chan)(chan)能(neng)(neng),大(da)部(bu)(bu)分(fen)(fen)主(zhu)機廠均處在產(chan)(chan)(chan)能(neng)(neng)嚴(yan)重(zhong)不(bu)飽和(he)狀(zhuang)態(tai)),產(chan)(chan)(chan)能(neng)(neng)不(bu)足(zu)嚴(yan)重(zhong)影(ying)響正產(chan)(chan)(chan)生(sheng)產(chan)(chan)(chan)節奏,不(bu)連續(xu)的(de)(de)(de)生(sheng)產(chan)(chan)(chan)使高固含(han)的(de)(de)(de)電(dian)(dian)(dian)泳(yong)漆(qi)(qi)極易在淌(tang)水(shui)(shui)板、室(shi)(shi)體壁版、擺(bai)桿(gan)底部(bu)(bu)水(shui)(shui)平(ping)支架(jia)、噴(pen)(pen)(pen)淋管路(lu)、噴(pen)(pen)(pen)嘴等位置沉(chen)積(ji),溶劑及(ji)水(shui)(shui)分(fen)(fen)揮發后(hou)形成(cheng)漆(qi)(qi)渣(zha)。二次復線生(sheng)產(chan)(chan)(chan)時淌(tang)水(shui)(shui)板、室(shi)(shi)體壁版及(ji)擺(bai)桿(gan)水(shui)(shui)平(ping)面上(shang)沉(chen)降凝結的(de)(de)(de)電(dian)(dian)(dian)泳(yong)漆(qi)(qi)渣(zha)被UF液(ye)沖(chong)(chong)刷(shua)溶解(jie)掉(diao)(diao)落后(hou)隨槽(cao)液(ye)循(xun)(xun)環回流至(zhi)(zhi)UF槽(cao)液(ye)中,各槽(cao)體無(wu)法(fa)及(ji)時循(xun)(xun)環過濾掉(diao)(diao)槽(cao)液(ye)中漆(qi)(qi)渣(zha),形狀(zhuang)不(bu)規(gui)則(ze)的(de)(de)(de)電(dian)(dian)(dian)泳(yong)漆(qi)(qi)渣(zha)黏附(fu)在電(dian)(dian)(dian)泳(yong)車身上(shang)(主(zhu)要發生(sheng)在水(shui)(shui)平(ping)面),不(bu)易被浸(jin)泡沖(chong)(chong)洗掉(diao)(diao),經(jing)過加熱烘(hong)(hong)烤后(hou)漆(qi)(qi)渣(zha)邊沿與(yu)漆(qi)(qi)膜融為一體,形成(cheng)四周圓(yuan)(yuan)滑、中間凸(tu)起不(bu)規(gui)則(ze)圓(yuan)(yuan)弧狀(zhuang)大(da)塊漆(qi)(qi)包。噴(pen)(pen)(pen)淋管路(lu)及(ji)噴(pen)(pen)(pen)嘴中沉(chen)積(ji)的(de)(de)(de)電(dian)(dian)(dian)泳(yong)漆(qi)(qi)渣(zha)經(jing)過UF噴(pen)(pen)(pen)淋沖(chong)(chong)刷(shua),形成(cheng)粒徑約為2 mm的(de)(de)(de)不(bu)規(gui)則(ze)漆(qi)(qi)塊黏附(fu)在車身外表(biao)面(機蓋、尾蓋水(shui)(shui)平(ping)居多),經(jing)過電(dian)(dian)(dian)泳(yong)烘(hong)(hong)爐高溫烘(hong)(hong)烤后(hou)形成(cheng)四周圓(yuan)(yuan)滑、中間凸(tu)起不(bu)規(gui)則(ze)圓(yuan)(yuan)弧狀(zhuang)漆(qi)(qi)包。

目(mu)前(qian),吉利汽車(che)集(ji)團公(gong)司下屬某(mou)自造基(ji)(ji)地涂裝廠(chang)電(dian)泳輸送方式(shi)采用經典雙擺桿線(xian),電(dian)泳材料采用國際主流油漆(qi)供應商(shang)提供的一(yi)(yi)款(kuan)新型高固(gu)含(han)的電(dian)泳漆(qi)。由于(yu)該基(ji)(ji)地目(mu)前(qian)只有一(yi)(yi)款(kuan)高端車(che)型,前(qian)期(qi)產(chan)(chan)(chan)量較低,常會出現較長時(shi)間(24 h以上(shang)(shang))的生(sheng)產(chan)(chan)(chan)間隔,因此電(dian)泳車(che)身(shen)經常會出現電(dian)泳漆(qi)包(bao)(bao)缺(que)(que)陷(xian)。該基(ji)(ji)地針對電(dian)泳車(che)身(shen)缺(que)(que)陷(xian)制作了單臺(tai)漆(qi)包(bao)(bao)數隨生(sheng)產(chan)(chan)(chan)時(shi)間間隔變化(hua)的趨勢圖,如(ru)圖1所示。它可(ke)直觀(guan)表示當時(shi)間間隔超過(guo)2 d時(shi)電(dian)泳漆(qi)包(bao)(bao)數量就會急(ji)劇上(shang)(shang)升(sheng),因此在生(sheng)產(chan)(chan)(chan)節(jie)奏不連續的客(ke)觀(guan)情況下需要制定(ding)一(yi)(yi)些措(cuo)施來(lai)改善和預防(fang)電(dian)泳漆(qi)包(bao)(bao)缺(que)(que)陷(xian)產(chan)(chan)(chan)生(sheng)。 

1   電泳漆包的改(gai)善

電泳(yong)漆(qi)(qi)包成因機理為(wei)槽(cao)液及(ji)噴淋管路中不(bu)規則片狀漆(qi)(qi)渣(zha)黏附(fu)在電泳(yong)濕(shi)膜(mo)上,經(jing)過烘烤形成外凸型漆(qi)(qi)包缺(que)陷。解決方法(fa)有兩種:1)消除漆(qi)(qi)渣(zha)產生;2)切斷漆(qi)(qi)渣(zha)黏附(fu)到(dao)車身(shen)上的途徑(jing)。

使用高(gao)固含低溶劑電(dian)泳(yong)漆(qi)(qi)(qi)是大勢所需(xu),該類型材料(liao)不(bu)僅有低VOC排(pai)放(fang),同(tong)時還具有較高(gao)的防腐性能,因(yin)此不(bu)建議(yi)因(yin)有電(dian)泳(yong)漆(qi)(qi)(qi)包(bao)缺(que)陷(xian)而(er)降(jiang)低固含量,此乃舍本逐末之舉(ju)。現場(chang)技(ji)術人員可以聯系油漆(qi)(qi)(qi)廠家與材料(liao)部門(men)進行聯合開(kai)發,優化改(gai)善顏料(liao)沉降(jiang)問題(ti),進而(er)從(cong)源頭改(gai)善漆(qi)(qi)(qi)渣(zha)產(chan)生(sheng)(sheng),杜絕漆(qi)(qi)(qi)包(bao)缺(que)陷(xian)產(chan)生(sheng)(sheng)。UF室體壁板及淌水板表面黏附(fu)的漆(qi)(qi)(qi)渣(zha)是造成電(dian)泳(yong)車(che)身漆(qi)(qi)(qi)渣(zha)的主要(yao)(yao)因(yin)素,故要(yao)(yao)想快(kuai)速有效解決電(dian)泳(yong)車(che)身漆(qi)(qi)(qi)包(bao)缺(que)陷(xian)需(xu)要(yao)(yao)從(cong)這兩個(ge)地(di)(di)方(fang)著(zhu)手(shou)改(gai)善。基(ji)于當(dang)前該基(ji)地(di)(di)涂裝(zhuang)電(dian)泳(yong)過線生(sheng)(sheng)產(chan)時間短、生(sheng)(sheng)產(chan)間隔時間長(chang)、生(sheng)(sheng)產(chan)節(jie)奏跨度大這一現狀,該基(ji)地(di)(di)制(zhi)定了針對性改(gai)善計劃。

電泳(yong)過(guo)線(xian)時UF1輔槽(cao)(cao)中(zhong)(zhong)(zhong)有(you)(you)大量(liang)(liang)(liang)泡(pao)(pao)沫(mo)(mo)產生,UF1槽(cao)(cao)液中(zhong)(zhong)(zhong)大量(liang)(liang)(liang)的不(bu)規則(ze)片(pian)狀漆(qi)渣依托泡(pao)(pao)沫(mo)(mo)懸(xuan)(xuan)浮(fu)(fu)在(zai)(zai)(zai)輔槽(cao)(cao)口(kou)上(shang)方(fang),一(yi)部(bu)分漂浮(fu)(fu)在(zai)(zai)(zai)槽(cao)(cao)液中(zhong)(zhong)(zhong)和(he)懸(xuan)(xuan)浮(fu)(fu)在(zai)(zai)(zai)槽(cao)(cao)子出口(kou)泡(pao)(pao)沫(mo)(mo)上(shang),另一(yi)小部(bu)分隨車(che)身帶出,大部(bu)分隨槽(cao)(cao)液循環至過(guo)濾(lv)(lv)系(xi)統中(zhong)(zhong)(zhong)過(guo)濾(lv)(lv)掉。針對槽(cao)(cao)液中(zhong)(zhong)(zhong)的電泳(yong)漆(qi)渣有(you)(you)三個方(fang)法可以進行控(kong)(kong)制,主要(yao)是控(kong)(kong)制UF系(xi)統液濾(lv)(lv)過(guo)濾(lv)(lv)精度、更換周期、實際壓(ya)差(cha),目前該基地UF系(xi)統為(wei)提升過(guo)濾(lv)(lv)效果使(shi)用10 μm高效過(guo)濾(lv)(lv)袋(dai),更換周期設定在(zai)(zai)(zai)2周/次,濾(lv)(lv)袋(dai)壓(ya)差(cha)范圍設定值(zhi)為(wei)0.1 MPa。在(zai)(zai)(zai)該控(kong)(kong)制范圍下能(neng)有(you)(you)效過(guo)濾(lv)(lv)出UF槽(cao)(cao)液中(zhong)(zhong)(zhong)懸(xuan)(xuan)浮(fu)(fu)的電泳(yong)漆(qi)渣。輔槽(cao)(cao)中(zhong)(zhong)(zhong)懸(xuan)(xuan)浮(fu)(fu)的電泳(yong)漆(qi)渣使(shi)用150 μm的尼龍單絲液濾(lv)(lv)袋(dai)進行人工打撈(lao)處(chu)理,打撈(lao)處(chu)理頻次為(wei)2 h/次。同時關注UF2槽(cao)(cao)液表面泡(pao)(pao)沫(mo)(mo)量(liang)(liang)(liang),泡(pao)(pao)沫(mo)(mo)量(liang)(liang)(liang)不(bu)建(jian)議超過(guo)槽(cao)(cao)液表面2/3。出槽(cao)(cao)噴(pen)淋壓(ya)力控(kong)(kong)制在(zai)(zai)(zai)0.18 MPa可以在(zai)(zai)(zai)保證清洗質量(liang)(liang)(liang)的同時有(you)(you)效減(jian)少(shao)出口(kou)泡(pao)(pao)沫(mo)(mo)的產生。

淌(tang)水(shui)(shui)板(ban)及(ji)(ji)(ji)室體水(shui)(shui)平面(mian)(mian)積液(ye),經水(shui)(shui)分蒸發后(hou)沉降凝結(jie),形成(cheng)不規(gui)則(ze)片狀、顆粒(li)狀積漆(qi),黏附(fu)在壁板(ban)表面(mian)(mian),隨(sui)著生(sheng)產(chan)間(jian)隔時間(jian)增長,這種不規(gui)則(ze)顆粒(li)由(you)于(yu)水(shui)(shui)分消(xiao)失逐漸由(you)外向里干結(jie),且不易(yi)二次溶解在槽液(ye)中。當(dang)這種顆粒(li)外表干結(jie)后(hou)再度生(sheng)產(chan)時,大量的UF液(ye)噴淋沖刷(shua),極(ji)易(yi)松動脫(tuo)落隨(sui)槽液(ye)一(yi)同回(hui)流至UF槽中,黏附(fu)在車身形成(cheng)漆(qi)包缺陷。針(zhen)對這類原因產(chan)生(sheng)的漆(qi)包缺陷主要從以(yi)下兩方面(mian)(mian)改善:1)及(ji)(ji)(ji)時清理壁板(ban)及(ji)(ji)(ji)淌(tang)水(shui)(shui)板(ban)上電

泳(yong)結(jie)漆(qi)類(lei)不(bu)規(gui)則(ze)干(gan)結(jie)漆(qi)渣(zha);2)生(sheng)產(chan)(chan)過(guo)(guo)線(xian)前(qian)(qian)提前(qian)(qian)打開UF系統所有(you)(you)噴淋(lin)設備閥門(men)及噴嘴。目(mu)前(qian)(qian)該(gai)基地采用(yong)兩種方(fang)法結(jie)合(he)使用(yong),生(sheng)產(chan)(chan)間(jian)隔不(bu)超過(guo)(guo)2 d回復生(sheng)產(chan)(chan)提前(qian)(qian)1.5 h打開噴淋(lin)系統,有(you)(you)效沖洗壁(bi)板等(deng)部(bu)位電泳(yong)漆(qi)渣(zha),利(li)用(yong)槽液(ye)(ye)(ye)循(xun)環(huan)將之過(guo)(guo)濾出UF循(xun)環(huan)系統;當生(sheng)產(chan)(chan)間(jian)隔超過(guo)(guo)2 d時需(xu)保潔(jie)人員(yuan)手工清理室體及淌水板結(jie)漆(qi)并(bing)在開線(xian)前(qian)(qian)2 h打開噴淋(lin)系統。關于淌水板表面(mian)電泳(yong)漆(qi)渣(zha)的(de)產(chan)(chan)生(sheng)需(xu)要重點排查該(gai)水平面(mian)是否(fou)存在有(you)(you)積(ji)(ji)液(ye)(ye)(ye)現(xian)象,若存在積(ji)(ji)液(ye)(ye)(ye)現(xian)象必然會產(chan)(chan)生(sheng)漆(qi)渣(zha),需(xu)要合(he)理開設回流(liu)口來避免該(gai)現(xian)象產(chan)(chan)生(sheng)。

2   電泳漆包(bao)的預防

電(dian)泳漆包預(yu)防(fang)主要從(cong)槽液(ye)(ye)參數(shu)、設(she)備與(yu)現場(chang)匹(pi)配度以及(ji)常規保潔維(wei)護等(deng)方面來預(yu)防(fang)電(dian)泳漆渣(zha)的產生,從(cong)源頭上避免電(dian)泳漆包的產生。首先(xian)從(cong)室體(ti)項目階段需(xu)考慮(lv)淌(tang)(tang)(tang)水(shui)板(ban)設(she)計尺寸及(ji)瀝(li)液(ye)(ye)角度,優先(xian)考慮(lv)車身瀝(li)液(ye)(ye)時間(jian),進而確定淌(tang)(tang)(tang)水(shui)板(ban)長度,建議將淌(tang)(tang)(tang)水(shui)板(ban)設(she)計成3° ~ 5°斜(xie)角。其次確認設(she)備安裝(zhuang)水(shui)平,要求回液(ye)(ye)口(kou)開設(she)在淌(tang)(tang)(tang)水(shui)板(ban)末端最低處,可盡量減少淌(tang)(tang)(tang)水(shui)板(ban)積液(ye)(ye)風險。

優化槽(cao)液參數,控(kong)(kong)制(zhi)(zhi)(zhi)槽(cao)液pH及控(kong)(kong)制(zhi)(zhi)(zhi)細(xi)菌繁殖(zhi)可減少(shao)電泳(yong)漆渣產生,該(gai)基地(di)將電泳(yong)pH控(kong)(kong)制(zhi)(zhi)(zhi)在(zai)5.3 ~ 5.5之間(jian),UF槽(cao)液pH控(kong)(kong)制(zhi)(zhi)(zhi)在(zai)5.2 ~ 5.3之間(jian),在(zai)能保證電泳(yong)反應正常成膜的(de)前提下盡量低控(kong)(kong)pH(區(qu)別槽(cao)液老化造成的(de)pH不可控(kong)(kong))。該(gai)基地(di)每周一次細(xi)菌培養,當槽(cao)液pH超過5.5后細(xi)菌培養頻次會隨之增加,以確保槽(cao)液無(wu)菌,同時降(jiang)低因菌尸造成的(de)結漆塊。

雙(shuang)擺(bai)(bai)桿(gan)及電泳(yong)(yong)滑橇(qiao)殘余槽(cao)液凝集,液體蒸發后(hou)形成電泳(yong)(yong)漆渣,針對(dui)此(ci)類問題,需(xu)要制定保(bao)潔維護周(zhou)期。建議將擺(bai)(bai)桿(gan)清(qing)理(li)頻次(ci)設定為2月/次(ci),電泳(yong)(yong)滑橇(qiao)3月/次(ci),定期保(bao)潔可(ke)有效防止電泳(yong)(yong)漆包。雙(shuang)擺(bai)(bai)桿(gan)線在室體端頭擺(bai)(bai)桿(gan)返(fan)回位(wei)置安裝(zhuang)有鋼刷(shua)對(dui)擺(bai)(bai)桿(gan)觸點(dian)部位(wei)進行清(qing)掃處(chu)理(li),建議安裝(zhuang)鋼刷(shua)時觸點(dian)頂部不超過鋼刷(shua)長(chang)度2/3,這(zhe)樣既可(ke)保(bao)障清(qing)掃能力也(ye)可(ke)最(zui)大化(hua)鋼刷(shua)使(shi)用(yong)壽命。

3   結語

1)改善電泳車(che)身漆包(bao)問題重點在于(yu)控制環境(jing)潔凈度,及時處理室體、淌水板等區域產生的漆渣,避(bi)免(mian)隨槽液循環黏附在車(che)身上。

2)改善電泳車身漆包缺(que)陷(xian)應在生產間隔超過2 d時需要對室體(ti)進行保潔清掃(sao),重(zhong)點(dian)清除淌水板上(shang)漆渣(zha)。

3)電泳擺桿清理頻次(ci)2月(yue)/次(ci),電泳滑橇清理頻次(ci)3月(yue)/次(ci),可有效減(jian)少(shao)漆(qi)包產(chan)生。 




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