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href="http://www.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="y88n284" class="twoCol"><div id="3db2gbd" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_jxjxysb/">機(jī)械及行業(yè)設(shè)備</a>?<a href="http://www.cdcfah.com/cp/second-jxjxysb_zzjrclsbfg/">鑄造及熱處理設(shè)備</a>?<a href="http://www.cdcfah.com/cp/third-zzjrclsbfg_zzsbev/">鑄造設(shè)備</a>?南京負(fù)壓V法鑄造特點(diǎn) 歡迎咨詢江陰華天科技供應(yīng)</p><div id="dtf9vvc" class="leftbox clearfix"><h1>南京負(fù)壓V法鑄造特點(diǎn) 歡迎咨詢江陰華天科技供應(yīng)</h1><div id="7kbf79a" class="proBig"><div id="eoazdu8" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889431923828/6575353.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="gpbypb3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889431923828/6575353.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3dof34w" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>南京負(fù)壓V法鑄造特點(diǎn),V法鑄造</p><p><span>***更新：</span>2020-12-01 06:15:17</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="bqc8neg" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江陰華天科技開發(fā)有限公司</a></p><p><span>聯(lián)系人：</span>謝經(jīng)理</p><p><span>郵箱: </span>273371292@qq.com</p><p><span>電話: </span>13961688156</p><p><span>傳真: </span>0510_</p><p><span>網(wǎng)址: </span>http://www.jy-dannier.com</p><p><span>手機(jī): </span>0510-86273026</p><p><span>地址: </span>月城鎮(zhèn)月翔路17號</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="sw2f49x" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="txzg3vk" class="box"><p><p> 耐火涂料的使用在V法鑄造中起到至關(guān)重要的作用。涂料層的性能不*影響薄膜氣化氣體的遷移，而且與鑄件表面質(zhì)量密切相關(guān)。涂料載液一般選用乙醇、甲醇或異丙醇，綜合實(shí)踐一般選用乙醇含量大于95％的工業(yè)酒精，沸點(diǎn)為70℃，密度0．8g／cm，閃點(diǎn)12℃。V法鑄造用涂料應(yīng)具有以下基本要求： </p> <p> 不與塑料薄膜反應(yīng)，***無味； </p> <p> 具有好的懸浮性和強(qiáng)韌性，涂料層有高的透氣性及良好的抗機(jī)械滲透粘砂的能力； </p> <p> 較高耐火度，其中應(yīng)含有耐火度較高的礦物和耐火度相對較低、易燒結(jié)的組分，燒結(jié)形成剝離層，清理時易潰散； </p> <p> 要有較小的發(fā)氣量，良好的流動性和觸變性； </p> <p> 較高附著力，南京負(fù)壓V法鑄造特點(diǎn)，南京負(fù)壓V法鑄造特點(diǎn)，涂料能牢固的粘附在塑料薄膜上形成致密的涂層。為了穩(wěn)定系統(tǒng)壓力，南京負(fù)壓V法鑄造特點(diǎn)，避免澆注時出現(xiàn)塌箱，應(yīng)加大穩(wěn)壓罐容積。南京負(fù)壓V法鑄造特點(diǎn)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京負(fù)壓V法鑄造特點(diǎn),V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889431923828/6575353.png"></div><p> 與傳統(tǒng)濕型相比，V法砂型少無型壁移動，其硬度可達(dá)90—95，由于干砂保溫時間長，冒口體積可減少5%—15%。因此V法鑄造可提高金屬液的利用率（球墨鑄鐵件提高約25%，鑄鋼件提高約20%）。V法鑄造適合生產(chǎn)球墨鑄鐵鑄件，也適合生產(chǎn)鑄鋼件。圖4為V法鑄造的球墨鑄鐵后橋。圖5為我國天瑞集團(tuán)鑄造有限公司V法鑄造的鐵道機(jī)車鑄鋼側(cè)架。 </p> <p> V法砂型處于真空，不含水份，保溫性能好，很適合生產(chǎn)小批量少無內(nèi)腔的鋁合金鑄件。日本曾采用大型V法造型機(jī)和超大砂箱（7000 mm×4000mm×1000/800mm）生產(chǎn)出鑄鋁游艇殼體（見圖6）。烏克蘭、荷蘭和美國等數(shù)家鑄造企業(yè)采用V法生產(chǎn)醫(yī)療，電子，通訊等行業(yè)用的小型鋁鑄件，其鑄件表面質(zhì)量可與金屬型鑄鋁件媲美。圖7為美國Harmony Casting公司采用V法生產(chǎn)的鑄鋁件，大平面厚度為4.7mm，局部薄至2.3mm。泰州專業(yè)V法鑄造價格負(fù)壓澆注，有利于金屬的補(bǔ)給，鑄件冒口可減小，鑄件表面光潔，尺寸精度高，加工余量減少。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京負(fù)壓V法鑄造特點(diǎn),V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889732578125/1173701.png"></div><p style="text-indent:25px">這就是因?yàn)榫植繗怏w難以迅速逃逸造成局部砂型強(qiáng)度下降的結(jié)果。有人提出低負(fù)壓大流量的說法，明確顯示出負(fù)壓很低但是整個生產(chǎn)過程非常安全。其實(shí)這就是砂箱結(jié)構(gòu)布置合理的效果。抽氣面積越大，抽氣位置越均勻越合理，泄入氣體排出越快，真空及鑄型強(qiáng)度穩(wěn)定性越好，塌箱危險(xiǎn)性也越低；另有觀點(diǎn)認(rèn)為，只要整個鑄型處在一個負(fù)壓場下，各點(diǎn)的強(qiáng)度應(yīng)該是一樣的。實(shí)則不然。實(shí)踐表明，同一個鑄型，各點(diǎn)的強(qiáng)度是有差異的。如對于一個*有四壁抽氣的砂箱來說，鑄型的強(qiáng)度往往由砂箱四周向中心逐漸減弱的趨勢，而砂箱輪廓越大，這種趨勢越明顯。</p><p style="text-indent:25px">金屬軟管抽氣和管式抽氣式復(fù)合砂箱。在V法鑄造實(shí)踐中，針對以上2種砂箱存在的各種問題，國內(nèi)多數(shù)廠家采用復(fù)合砂箱，其箱壁用10mm鋼板焊接，用金屬軟管抽氣。砂箱結(jié)構(gòu)簡單，單層壁構(gòu)成，可制作尺寸較大的砂箱。為避免塌箱引起鑄型沉降和變形，設(shè)置較密箱帶。金屬管兩端與固定在砂箱上壁的真空接頭相連，抽氣時，通過軟管的各活動節(jié)的縫隙來抽吸砂粒間的空氣，同時又能阻止細(xì)砂及粉塵被吸走。因軟管間隙較大易吸人砂粒和粉塵，真空管路系統(tǒng)必須配有濾砂和水浴裝置。提高澆注速度，加快金屬液的上升速度，縮短澆注時間，減小鑄型表面的烘烤時間，防止鑄型塌砂；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京負(fù)壓V法鑄造特點(diǎn),V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889895390625/1638242.png"></div><p style="text-indent:25px">V法鑄造用的砂箱，其結(jié)構(gòu)形式直接決定著砂箱內(nèi)負(fù)壓場的形成和分布，也就決定著鑄型強(qiáng)度的大小和均勻性。但是，不少觀念錯誤的認(rèn)為，只要砂箱里面能夠抽氣就行，至于怎么抽，抽多少，都無關(guān)緊要，只要不塌箱即可。所以目前，既有單純的抽氣管抽氣的砂箱，也有靠四壁抽氣的砂箱，**復(fù)雜的則有四壁抽氣并外加箱帶或抽氣管輔助的形式；似乎都達(dá)到了同樣的目的，都能生產(chǎn)出鑄件。然而，產(chǎn)生的影響卻是不一樣的。生產(chǎn)上習(xí)慣了用真空度來衡量或者表征鑄型的強(qiáng)度，認(rèn)為真空度越高，鑄型強(qiáng)度越高，塌箱的幾率也越小；實(shí)際上，對于砂箱來說，真空的形成是氣體流動的結(jié)果，是型腔內(nèi)的空氣被真空系統(tǒng)抽走之后形成的。一般灰鑄鐵推薦選用底注半封閉式澆注系統(tǒng)，其澆道截面積比例為F直∶F橫∶F內(nèi)＝1∶(1.2～1.5)∶(0.8～1)；南通質(zhì)量V法鑄造效果</p><p style="text-indent:25px">固定式冷卻沸騰床采用水循環(huán)冷卻，水泵將冷水輸送至沸騰床內(nèi)冷卻水管中與熱砂充分地?zé)峤粨Q達(dá)到冷卻目的。南京負(fù)壓V法鑄造特點(diǎn)</p><p style="text-indent:25px">而鑄型不可能是完全密封的，始終處在一種氣體泄入并被抽走的過程中。顯然，距離抽氣口越近，氣體被抽速度越快，那么從氣流角度分析，越靠近砂箱四壁和抽氣管的地方，真空保持的越穩(wěn)定，強(qiáng)度也越高。澆注之前，外界氣體泄入量往往較小，會被及時抽走，不會對鑄型強(qiáng)度造成不利影響。但是，澆注過程中，隨著大面積薄膜的燒蝕，外界氣體泄入量劇增，如果泄入的氣體不能被及時抽走，鑄型內(nèi)部氣壓上升強(qiáng)度降低，就會造成塌箱。有時候盡管砂箱已經(jīng)有四壁抽氣甚至還有少量抽氣箱帶或者抽氣管，而且真空度還很高，仍然會塌箱。南京負(fù)壓V法鑄造特點(diǎn)</p><p style="text-indent:25px">江陰華天科技開發(fā)有限公司致力于機(jī)械及行業(yè)設(shè)備，是一家生產(chǎn)型的公司。江陰華天科技致力于為客戶提供良好的氣力輸送，V法鑄造，輸送機(jī)械，環(huán)保設(shè)備，一切以用戶需求為中心，深受廣大客戶的歡迎。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造機(jī)械及行業(yè)設(shè)備良好品牌。江陰華天科技秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營理念，全力打造公司的重點(diǎn)競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2218654.html</p></div></div></div></div></div><div id="rl2uouq" class="page-right twoColRt"><div id="lpdkefr" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="tsjqxel" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="bawy7s3" class="recomPic likePro"><a 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