噴塑橋架

噴塑電纜橋架是將塑料粉末噴涂在電纜橋架上的一種表面處理方法。

不(bu)需稀料，施(shi)(shi)工對環境對人體無(wu)毒害；涂層外觀質(zhi)量優異，附著力(li)及機械強度強；噴(pen)涂施(shi)(shi)工固(gu)化時間(jian)短(duan)；涂層耐腐(fu)耐磨(mo)能力(li)高出(chu)很多；不(bu)需底漆；施(shi)(shi)工簡便，對工人技術要(yao)求低；成本(ben)低于噴(pen)漆工藝；有些施(shi)(shi)工場合已經明(ming)確提出(chu)使用靜電(dian)(dian)噴(pen)塑(su)工藝處理；靜電(dian)(dian)噴(pen)粉噴(pen)涂過程中不(bu)會出(chu)現噴(pen)漆工藝中常見(jian)的流淌現象。

是(shi)利用(yong)電(dian)(dian)(dian)(dian)暈放電(dian)(dian)(dian)(dian)現象使(shi)(shi)粉(fen)(fen)末(mo)(mo)涂料吸附在(zai)電(dian)(dian)(dian)(dian)纜橋架(jia)上的。其過程是(shi)這樣的：粉(fen)(fen)末(mo)(mo)涂料由供粉(fen)(fen)系統借壓縮空(kong)氣氣體送(song)入噴(pen)槍(qiang)，在(zai)噴(pen)槍(qiang)前(qian)端(duan)加有(you)高(gao)壓靜電(dian)(dian)(dian)(dian)發生(sheng)(sheng)器產(chan)生(sheng)(sheng)的高(gao)壓，由于電(dian)(dian)(dian)(dian)暈放電(dian)(dian)(dian)(dian)，在(zai)其附近產(chan)生(sheng)(sheng)密集(ji)的電(dian)(dian)(dian)(dian)荷，粉(fen)(fen)末(mo)(mo)由槍(qiang)嘴(zui)噴(pen)出(chu)時，形成帶(dai)電(dian)(dian)(dian)(dian)涂料粒(li)子(zi)，它(ta)受靜電(dian)(dian)(dian)(dian)力的作(zuo)(zuo)用(yong)，被吸到與其相反的工件上去，隨著噴(pen)上的粉(fen)(fen)末(mo)(mo)增多，電(dian)(dian)(dian)(dian)荷積聚也越多，當達到一(yi)定(ding)厚度時，由于產(chan)生(sheng)(sheng)靜電(dian)(dian)(dian)(dian)排斥作(zuo)(zuo)用(yong)，便不繼續吸附，從而使(shi)(shi)整(zheng)個工件獲得一(yi)定(ding)厚度的粉(fen)(fen)末(mo)(mo)涂層，然后經過熱使(shi)(shi)粉(fen)(fen)末(mo)(mo)熔融、流平、固化(hua)，即在(zai)工件表(biao)面形成堅硬的涂膜。