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鵬鲲動態

塑膠自動噴塗線靜電噴粉的基本原理

塑膠自動噴塗線靜電噴塗的基本原理粉末靜電塗裝是利用高壓靜電電暈電場的原理，在噴槍頭部金屬導流環上接上高壓負極，被噴塗工件接地形成正極。使噴槍和鋁型材之間形成一個較強的靜電電場。當作爲運載體的壓縮空氣將粉末塗料從供粉桶經粉管送到噴槍的導流環時，由于導流環接上高壓負極産生的電暈放電，在其附近産生了密集的負電荷,使粉末帶上負電荷.並進入了電場強度很高的靜電場,在靜電力和運載氣體的雙重作用下,粉末均勻地飛向接地工件，並在鋁型材表面形成厚薄均勻的粉末塗層。經加熱固化轉化爲具有一定耐蝕性能的塗膜

塑膠自動噴塗線喷涂过程中常出现的弊病突发性大,除上述工藝生産中較易出現的不良原因之外，還有許多因素影響塗層的表面塗裝質量,需要在生产中不断地研究探索和总结、改进工艺条件尽可能避免涂层缺陷的发生，提高喷涂産品的质量。总之适宜的工艺规范和严格按工艺规范进行操作，是获得高质量涂装前处理效果的重要条件。在涂装生产过程中，制定先进的切实可行的工艺规范是必要的，但更重要的是让操作者真正掌握要点、难点，并严格执行和加强管理,才是避免涂层缺陷发生提高喷涂産品质量的切实有效的方法。

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"I shall count myself honored," said I, and we went, together and alone. "It's the fifth house," she said. "I shall trust to chance that the people are in bed. If not, I dare say I shall have a good tale to tell." or not so long as they are pretty? One can't help thinking, though, Further on we came to a courtyard surrounded by a cloister, where the market for precious stones was held. The empress, invisible under her wrappers of gauze as thin as air, and surrounded by her women fanning her, would come out on her high balcony to choose the gems that pleased her for a moment by their sparkle, and then disappear into the gardens behind insurmountable walls. In another court, a[Pg 209] pool kept stocked with fish gave Shah Jehangir the pleasure of fancying he was fishing. “Matched stones—and priceless,” added Larry. “The paper said they were a present to one of Mr. Everdail’s ancestors by one of the most fabulously rich Hindu Nabobs who ever lived.” "Matarán á Usted." "Geronimo," mumbled the Apache, "has prayed to the Dawn and the Darkness and the Sun and the Sky to help him put a stop to those bad stories that people put in the papers about him. He is afraid it will be done as they say." The press of the country was full just then, and had been for some time past, of suggestions that the only good use the much-feared Geronimo could be put to would be hanging, the which he no doubt richly deserved. But if every one in the territories who deserved hanging had been given his dues, the land would have been dotted with blasted trees. That night Charles and his chief officers lay at Culloden House, the seat of the able and patriotic Lord-President, Duncan Forbes; but the troops were obliged to lie on the moor amid the heather, which served them both for beds and fuel, the cold being very severe. They were up early in the morning, and formed in order of battle on[106] Drummossie Muir, the part of the heath of Culloden near to Culloden House. No enemy, however, appeared, and there the poor hungry men lay for most of the day with no other food than a biscuit per man. A council of war being called, Lochiel stated this fact as a plea for delay; Lord John Drummond, the Duke of Perth, and others, were of the same opinion; but Lord George Murray declared for making a night march, and surprising the duke's army whilst it would lie, as they supposed, asleep in a drunken debauch. Charles, who had the same idea, but had not yet broached it, embraced Lord George with ardour, declaring it of all things his own wish. The idea was adopted, yet the slightest military wisdom would have shown them the futility of the scheme. The men were in a general state, not only of famine, but of discontent, from the non-payment of their arrears. The night was dark, and the men soon began to stumble through bog and mire, making their march heavy, and causing them to curse and swear. It was soon found that they were so feeble and incapable of walking, even, to say nothing of fighting after a fourteen or fifteen miles' march, on empty stomachs, that it was impossible to make the rear keep up with the van. They had calculated on being at Nairn at two o'clock, but it was that hour before they had all passed Kilravock House, only four miles from the English camp. It was clear that it would be daylight long before they reached Nairn, and they could only get there to be slaughtered in helplessness, for they would be too tired either to fight or run away. It was therefore agreed to return. Nicholas Hawksmoor, a pupil of Wren's, and an assistant of Vanbrugh's in building Castle Howard and Blenheim House, was the architect of St. George's-in-the-East, Ratcliff Highway, begun in 1715; of St. Mary Woolnoth, Lombard Street; of St. George's, Bloomsbury; St. Anne's, Limehouse; of Easton Norton House, in Northamptonshire; and of some other works, including a mausoleum at Castle Howard, and repairs of the west front of Westminster Abbey. St. George's, Bloomsbury, is perhaps his finest structure. It has a Corinthian portico, like St. Martin's, and the steeple is surmounted by a statue of George II. "Not any better'n Sergeant Klegg," responded Harry, taking up the gantlet for his favorite. "Long-legged men are very good in their way, but they don't have the brains that shorter men have. Nature don't give no man everything. What she gives to his legs she takes off his head, my dad says." That blow must be delivered, as We have been advised by Our Councillors. It shall be delivered. "'O why when we loved like the swallows in April, "He's not playing badly, is he, mother?" Chapter 14 It was those few steps which lost him to her, for they brought him within sight of Boarzell—framed in the window, where Castweasel woods had been. It lay in a great hush, a great solitude, a quiet beast of power and mystery. It seemed to call to him through the twilight like a love forsaken. There it lay, Boarzell—strong, beautiful, desired, untamed, still his hope, still his battle. And Alice?... He gave her a look, and left her. "It is no enemy bearing down upon you, friends," said the galleyman, in that tone of confidence which seems neither to suspect or purpose ill. "Tell me, is either of you the son of her who—who lies here?" HoME 在线a一级做暖暖免费看ENTER NUMBET 002www.bjbokaida.com.cn
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