靜電噴槍工作原理是什么
靜電(dian)(dian)噴槍是以接地被(bei)涂(tu)物(wu)為(wei)正電(dian)(dian)極,涂(tu)料(liao)(liao)霧化(hua)裝裝置(zhi)為(wei)負(fu)電(dian)(dian)極,并將涂(tu)料(liao)(liao)霧化(hua)裝置(zhi)帶高(gao)負(fu)電(dian)(dian)壓,在二極間制(zhi)成靜電(dian)(dian)界,使霧化(hua)涂(tu)料(liao)(liao)粒(li)子帶負(fu)電(dian)(dian),使涂(tu)料(liao)(liao)有效地被(bei)吸(xi)著(zhu)于(yu)相反電(dian)(dian)極的(de)被(bei)物(wu)面上(shang)的(de)方法謂之靜電(dian)(dian)涂(tu)裝。那么(me)為(wei)什么(me)將被(bei)涂(tu)物(wu)作為(wei)正極而涂(tu)料(liao)(liao)霧化(hua)裝置(zhi)作成負(fu)極呢?乃因此相反時,其轉(zhuan)移為(wei)火花放電(dian)(dian)較難不安(an)全的(de)緣故。
為(wei)(wei)了實施靜電(dian)涂(tu)(tu)裝(zhuang),被涂(tu)(tu)物的(de)接地乃(nai)是重要必須條件,那被涂(tu)(tu)物必須為(wei)(wei)電(dian)氣的(de)良導體。木(mu)材(cai)通(tong)常(chang)被認為(wei)(wei)電(dian)氣不良導體,但其含水率(lv)為(wei)(wei)8%以(yi)上時,則可(ke)(ke)實行靜電(dian)涂(tu)(tu)裝(zhuang),而經驗(yan)上也(ye)被確認。此乃(nai)通(tong)常(chang)的(de)靜電(dian)涂(tu)(tu)裝(zhuang),在正負二極間(jian)所流的(de)電(dian)流值為(wei)(wei)20~50微安培(MICRO-AMPERE),非常(chang)小,所以(yi)雖然是如木(mu)材(cai)般,電(dian)阻值較大(da)的(de)物體也(ye)可(ke)(ke)以(yi)實施靜電(dian)涂(tu)(tu)裝(zhuang)。
怎么使用靜電噴槍
一、清洗
打開(kai)油(you)(you)(you)泵(beng)(beng)氣壓(ya)使油(you)(you)(you)泵(beng)(beng)吸滿洗(xi)槍(qiang)(qiang)水(shui),清洗(xi)油(you)(you)(you)泵(beng)(beng)及噴(pen)嘴,清洗(xi)油(you)(you)(you)泵(beng)(beng)時油(you)(you)(you)泵(beng)(beng)回(hui)流開(kai)關(guan)開(kai)三分之(zhi)一,使之(zhi)循環(huan)。(水(shui)性(xing)靜(jing)電槍(qiang)(qiang)回(hui)油(you)(you)(you)管,為靜(jing)電搶(qiang)直接(jie)回(hui)油(you)(you)(you)),清洗(xi)干凈后(hou)拿起油(you)(you)(you)泵(beng)(beng)吸油(you)(you)(you)嘴,打開(kai)油(you)(you)(you)泵(beng)(beng)回(hui)流開(kai)關(guan)(水(shui)槍(qiang)(qiang)靜(jing)電槍(qiang)(qiang)直接(jie)回(hui)流)排(pai)干凈洗(xi)槍(qiang)(qiang)水(shui),再(zai)放入油(you)(you)(you)漆(qi)(qi)桶內,放入油(you)(you)(you)漆(qi)(qi)的同時將油(you)(you)(you)漆(qi)(qi)攪拌均勻,油(you)(you)(you)漆(qi)(qi)濃(nong)度一般為透明漆(qi)(qi)11S左(zuo)右、有色(se)漆(qi)(qi)13S左(zuo)右,油(you)(you)(you)漆(qi)(qi)濃(nong)度不能過高,會影響(xiang)導電性(xing)及流平性(xing)。
二、噴槍調試
1、安裝(zhuang)好(hao)噴(pen)嘴,打開氣壓(ya),調節(jie)好(hao)噴(pen)嘴霧(wu)化(hua)弧度,噴(pen)涂過程中(zhong)如需要調節(jie)霧(wu)化(hua)弧度,必須先將噴(pen)槍槍頭(tou)靠近墻壁,放掉(diao)槍上殘(can)留(liu)的靜電(dian)再調節(jie)或者(zhe)關閉電(dian)源(yuan)放掉(diao)殘(can)留(liu)的靜電(dian)再進行調節(jie)
2、調(diao)節(jie)好打(da)開靜(jing)(jing)(jing)(jing)電箱電源(yuan)開關,正常使用(yong)靜(jing)(jing)(jing)(jing)電搶靜(jing)(jing)(jing)(jing)電范(fan)圍調(diao)整在(50-70V)再觀察靜(jing)(jing)(jing)(jing)電箱上顯示位置(zhi),是否在參考范(fan)圍內(nei)
3、噴(pen)涂時根據(ju)工件平面大小(xiao)確定(ding)噴(pen)槍與工件距離(li),小(xiao)五(wu)金一(yi)般為(wei)(5-8公(gong)分(fen)左(zuo)右(you)),大五(wu)金則(ze)距離(li)可適當(dang)拉遠些(一(yi)般控制在8-12公(gong)分(fen)左(zuo)右(you))
三、啟動涂料供給裝置
將(jiang)控制箱的電源開關扳到ON位置,扣動(dong)扳機,紅(hong)燈點(dian)亮時,顯示噴(pen)槍前端已(yi)有高(gao)壓(ya)電輸出。啟動(dong)涂(tu)料供給裝置,將(jiang)涂(tu)料送(song)至(zhi)噴(pen)槍,將(jiang)空氣調壓(ya)閥(fa)調為低壓(ya)(1-3kgf/cm2左(zuo)右(you)),泵回轉,涂(tu)料吸入。用裝在泵的涂(tu)料出入口處(chu)的涂(tu)料調壓(ya)器(qi)將(jiang)泵壓(ya)調到0.5~2kgf/cm2左(zuo)右(you)。
四、噴撒涂料
將霧化空(kong)氣(qi)壓調(diao)(diao)為(wei)0kgf/cm2,不要(yao)噴(pen)出(chu)(chu)空(kong)氣(qi),扣動扳(ban)機,直(zhi)到(dao)(dao)噴(pen)槍噴(pen)出(chu)(chu)涂料(liao)(liao)(liao),涂料(liao)(liao)(liao)軟管內如有殘留空(kong)氣(qi),涂料(liao)(liao)(liao)噴(pen)出(chu)(chu)時(shi)會呈斷斷續(xu)續(xu)的(de)狀態,所以一(yi)直(zhi)噴(pen)到(dao)(dao)無空(kong)氣(qi)為(wei)止(zhi)。涂料(liao)(liao)(liao)噴(pen)出(chu)(chu)量(liang)調(diao)(diao)節噴(pen)槍后面的(de)涂料(liao)(liao)(liao)調(diao)(diao)節器,向左旋轉(zhuan)噴(pen)出(chu)(chu)量(liang)增(zeng)加,向右(you)旋轉(zhuan)到(dao)(dao)頭噴(pen)出(chu)(chu)停止(zhi)。在(zai)休息時(shi)將涂料(liao)(liao)(liao)調(diao)(diao)節器向左旋緊使不能噴(pen)出(chu)(chu)或降低涂料(liao)(liao)(liao)輸送的(de)壓力。
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