靜電噴槍工作原理是什么
靜電(dian)(dian)(dian)(dian)噴(pen)槍是以接(jie)地被涂物(wu)為正電(dian)(dian)(dian)(dian)極,涂料(liao)霧(wu)(wu)化(hua)裝(zhuang)(zhuang)裝(zhuang)(zhuang)置(zhi)為負(fu)(fu)電(dian)(dian)(dian)(dian)極,并將(jiang)(jiang)涂料(liao)霧(wu)(wu)化(hua)裝(zhuang)(zhuang)置(zhi)帶高負(fu)(fu)電(dian)(dian)(dian)(dian)壓,在二極間制成靜電(dian)(dian)(dian)(dian)界(jie),使霧(wu)(wu)化(hua)涂料(liao)粒子帶負(fu)(fu)電(dian)(dian)(dian)(dian),使涂料(liao)有效(xiao)地被吸著于相(xiang)反(fan)電(dian)(dian)(dian)(dian)極的被物(wu)面上的方法(fa)謂之靜電(dian)(dian)(dian)(dian)涂裝(zhuang)(zhuang)。那(nei)么為什(shen)么將(jiang)(jiang)被涂物(wu)作(zuo)為正極而涂料(liao)霧(wu)(wu)化(hua)裝(zhuang)(zhuang)置(zhi)作(zuo)成負(fu)(fu)極呢?乃因此相(xiang)反(fan)時,其轉移為火花放電(dian)(dian)(dian)(dian)較難不安全(quan)的緣故。
為(wei)了實(shi)(shi)施靜電(dian)涂裝(zhuang),被涂物的(de)(de)接地乃是(shi)重(zhong)要(yao)必(bi)須條件,那(nei)被涂物必(bi)須為(wei)電(dian)氣的(de)(de)良導體(ti)。木材通常被認(ren)為(wei)電(dian)氣不(bu)良導體(ti),但其(qi)含水(shui)率為(wei)8%以(yi)上(shang)時,則可實(shi)(shi)行靜電(dian)涂裝(zhuang),而經驗上(shang)也被確認(ren)。此乃通常的(de)(de)靜電(dian)涂裝(zhuang),在(zai)正(zheng)負二極間所流的(de)(de)電(dian)流值為(wei)20~50微安培(MICRO-AMPERE),非常小,所以(yi)雖然是(shi)如木材般,電(dian)阻值較大的(de)(de)物體(ti)也可以(yi)實(shi)(shi)施靜電(dian)涂裝(zhuang)。
怎么使用靜電噴槍
一、清洗
打開(kai)油(you)(you)泵氣壓使油(you)(you)泵吸滿洗(xi)(xi)槍(qiang)水,清(qing)(qing)洗(xi)(xi)油(you)(you)泵及噴嘴(zui),清(qing)(qing)洗(xi)(xi)油(you)(you)泵時油(you)(you)泵回流(liu)(liu)開(kai)關(guan)開(kai)三分之(zhi)(zhi)一,使之(zhi)(zhi)循環。(水性靜(jing)電(dian)槍(qiang)回油(you)(you)管,為靜(jing)電(dian)搶直接回油(you)(you)),清(qing)(qing)洗(xi)(xi)干(gan)凈(jing)后拿(na)起油(you)(you)泵吸油(you)(you)嘴(zui),打開(kai)油(you)(you)泵回流(liu)(liu)開(kai)關(guan)(水槍(qiang)靜(jing)電(dian)槍(qiang)直接回流(liu)(liu))排干(gan)凈(jing)洗(xi)(xi)槍(qiang)水,再放入(ru)油(you)(you)漆(qi)桶內,放入(ru)油(you)(you)漆(qi)的同時將油(you)(you)漆(qi)攪拌均(jun)勻,油(you)(you)漆(qi)濃度(du)(du)一般(ban)為透明漆(qi)11S左(zuo)右(you)、有色漆(qi)13S左(zuo)右(you),油(you)(you)漆(qi)濃度(du)(du)不能過高(gao),會影響(xiang)導電(dian)性及流(liu)(liu)平性。
二、噴槍調試
1、安(an)裝好噴(pen)(pen)嘴,打開氣壓,調節好噴(pen)(pen)嘴霧(wu)(wu)化(hua)弧度,噴(pen)(pen)涂(tu)過程(cheng)中(zhong)如需要(yao)調節霧(wu)(wu)化(hua)弧度,必須先將噴(pen)(pen)槍槍頭靠近墻壁,放掉(diao)槍上殘(can)留(liu)的(de)靜電(dian)再(zai)調節或者關閉電(dian)源放掉(diao)殘(can)留(liu)的(de)靜電(dian)再(zai)進(jin)行(xing)調節
2、調(diao)節好打開(kai)靜電箱(xiang)電源(yuan)開(kai)關(guan),正常使(shi)用靜電搶靜電范圍調(diao)整在(zai)(50-70V)再觀察靜電箱(xiang)上顯示(shi)位置,是否在(zai)參考范圍內
3、噴(pen)涂時根據工件平面(mian)大小(xiao)確(que)定噴(pen)槍與工件距離(li),小(xiao)五金一(yi)般為(wei)(5-8公分左右(you)),大五金則距離(li)可適當拉遠些(一(yi)般控(kong)制在8-12公分左右(you))
三、啟動涂料供給裝置
將(jiang)控制箱的(de)電源開關扳(ban)到ON位置(zhi),扣動(dong)扳(ban)機,紅燈點亮時,顯示噴槍前(qian)端(duan)已有高壓(ya)電輸出(chu)。啟動(dong)涂料供(gong)給(gei)裝置(zhi),將(jiang)涂料送至噴槍,將(jiang)空氣調(diao)壓(ya)閥(fa)調(diao)為低壓(ya)(1-3kgf/cm2左(zuo)(zuo)右),泵回轉,涂料吸入(ru)。用裝在泵的(de)涂料出(chu)入(ru)口處的(de)涂料調(diao)壓(ya)器將(jiang)泵壓(ya)調(diao)到0.5~2kgf/cm2左(zuo)(zuo)右。
四、噴撒涂料
將霧(wu)化空(kong)氣壓調(diao)為(wei)0kgf/cm2,不要噴(pen)(pen)(pen)出(chu)空(kong)氣,扣動扳機(ji),直(zhi)(zhi)到噴(pen)(pen)(pen)槍噴(pen)(pen)(pen)出(chu)涂(tu)(tu)(tu)料(liao),涂(tu)(tu)(tu)料(liao)軟(ruan)管內如有殘留空(kong)氣,涂(tu)(tu)(tu)料(liao)噴(pen)(pen)(pen)出(chu)時會呈(cheng)斷斷續續的狀態(tai),所以一直(zhi)(zhi)噴(pen)(pen)(pen)到無空(kong)氣為(wei)止。涂(tu)(tu)(tu)料(liao)噴(pen)(pen)(pen)出(chu)量調(diao)節噴(pen)(pen)(pen)槍后面的涂(tu)(tu)(tu)料(liao)調(diao)節器,向左旋轉(zhuan)噴(pen)(pen)(pen)出(chu)量增(zeng)加,向右旋轉(zhuan)到頭噴(pen)(pen)(pen)出(chu)停止。在(zai)休息(xi)時將涂(tu)(tu)(tu)料(liao)調(diao)節器向左旋緊使不能噴(pen)(pen)(pen)出(chu)或降低涂(tu)(tu)(tu)料(liao)輸送的壓力。
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