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#f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>揚州真空密封V法鑄造流程,V法鑄造</p><p><span>***更新：</span>2020-12-02 08:16:04</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="ntj3pxh" 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: </span>0510-86273026</p><p><span>地址: </span>月城鎮(zhèn)月翔路17號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="2yl387a" class="page-proshow02"><p class="title">詳細說明</p><div id="exsdto8" class="box"><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，揚州真空密封V法鑄造流程，不會對鑄型強度造成不利影響，揚州真空密封V法鑄造流程。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，揚州真空密封V法鑄造流程，鑄型內(nèi)部氣壓上升強度降低，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。利用短流程工藝來澆注V法鑄造中的特大件如大型配重等也引起了越來越多人的濃厚興趣。揚州真空密封V法鑄造流程</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="揚州真空密封V法鑄造流程,V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889462666016/4862105.png"></div><p> 對于澆注系統(tǒng)的設計，不少文獻和資料均有詳盡解說，在此不再贅述，*就注意事項簡要說明。 </p> <p> 澆注系統(tǒng)盡量采用半開半閉方案，這種扼流型澆注系統(tǒng)可以有效避免高紊流狀態(tài)發(fā)生，可以降低金屬液在充型腔過程中的流動速度和對型壁、坭芯的沖擊，減少鑄造缺點。 </p> <p> 盡量采用陶瓷材料成型澆注系統(tǒng)，避免鋼水長時間沖刷澆道而造成由于夾砂、夾涂料產(chǎn)生的鑄造缺點。 </p> <p> 盡可能采用中間澆注方式，這樣可以減少因底注造成對上型壁長時間烘烤造成塌型、上型凹陷、薄膜和涂料產(chǎn)生的氣孔等，亦可減弱頂注產(chǎn)生對下型壁和坭芯的沖擊、紊流和裹氣等缺點。 </p> <p> 合理布置冒口，尤其是明冒口布置，一般應布置在澆口附近和遠離澆口的鑄件末端，便于透氣和排氣，易于鑄件成型和減少氣孔。南通真空V法鑄造2008年時我國鑄鐵件廠產(chǎn)量達2510萬噸，其中按短流程工藝生產(chǎn)的鑄件約占11.3%。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="揚州真空密封V法鑄造流程,V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889813476563/989149.png"></div><p> V法鑄造工藝過程和特點 </p> <p> 1 V法鑄造基本工藝過程 </p> <p> 制造帶有抽氣箱和抽氣孔模樣。 </p> <p> 烘烤薄膜并覆蓋到模樣上，抽負壓，使覆膜成形，后噴上快干涂料。 </p> <p> 將帶有過濾抽氣管的砂箱，放在已覆有薄膜的模板上。 </p> <p> 充填、振實、刮平箱內(nèi)干砂，放上密封膜，抽負壓，使鑄型內(nèi)外產(chǎn)生壓力差而緊實，。 </p> <p> 解除模樣內(nèi)真空，起模。鑄型保持負壓狀態(tài)，直到下芯，合箱，澆鑄。 </p> <p> 脫箱落砂。冷卻后，將砂箱內(nèi)的壓力恢復到常壓狀態(tài)，砂型自動潰散，鑄件保溫后取出，砂冷卻后返回系統(tǒng)循環(huán)使用，將鑄件取走進入清理工部完成工藝過程。 </p><p> V法鑄造工藝流程 </p> <p> <span style="font-size:12px;">其流程如下。</span> </p> <p> 1．加熱薄膜并覆膜 </p> <p> (1)薄膜材質(zhì)EVA。 </p> <p> (2)薄膜厚度0.15mm。 </p> <p> (3)加熱溫度80~120℃。 </p> <p> (4)吸氣壓強：26.7~53.4kPa。 </p> <p> 2．放置澆注系統(tǒng)并加冒口 </p> <p> (1)直澆道為進口陶管，用膠帶粘到模樣上并密封。 </p> <p> (2)冒口為木頭，用塑料包好并用膠帶纏到模樣上密封好。 </p> <p> (3)澆道和冒口都要密封好，已放置漏氣不能很好覆膜。 </p> <p> (4)澆道和冒口與模樣的連接處用刀子切口，便于后期澆注是排氣。 </p> <p> 3．噴涂料并等待涂料干燥 </p> <p> （1）涂料成分：重量比為50%的工業(yè)酒精與50%的滑石粉混合的懸濁液。 </p> <p> （2）噴漆厚度：0.04mm。 </p> <p> （3）使用要求：噴涂均勻，個別地方要補刷涂料；噴涂后要等待涂料烘干再放砂。國家環(huán)保的壓力更是推動了部分不符合標準的小企業(yè)加快了這一實驗的腳步。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="揚州真空密封V法鑄造流程,V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889931113282/8104857.png"></div><p> 首先，模樣作成空心，表面開設抽氣孔（抽氣孔直徑一般為0.5～2.5 mm），形成抽氣室，模樣盡量避免尖銳的棱角，較大的模樣內(nèi)部設置加強筋，以保證在抽氣負壓作用下，模樣不破裂或變形；其次，薄膜和模樣之間較光滑，模樣撥模斜度可適當減?。?</p> <p> 木模表面不宜涂刷漆片溶液或耐溫低于60～70℃的其它油漆，否則將烘熱的塑料薄膜覆上后會出現(xiàn)粘膜現(xiàn)象，影響拔模。 </p> <p> 模樣的制作應充分認識V法鑄造抽真空的特點及保證吸膜成型性的需要，大平板及分型面處要保證足夠的強度和順暢的通氣性，利用定位銷或砂胎等使模樣定位要準確。正確選擇真空泵以及合理的真空系統(tǒng)是保證V法鑄型穩(wěn)定負壓度的前提。南通真空V法鑄造</p><p style="text-indent:25px">但澆注時負壓度的變化大，澆注瞬間，負壓度下降快，澆注完畢后鑄型能恢復并保持較高的負壓度。揚州真空密封V法鑄造流程</p><p style="text-indent:25px">V法鑄造（真空密封造型）是七十年代初由日本首先發(fā)明，之后經(jīng)美國，歐洲各國鑄造**研究，確立了V法造型的比較好和**基本方法。目前這種新穎鑄造方法已***使用在鑄鐵、鑄鋼、有色鑄造行業(yè)中，鑄件的重量從幾克到重達幾十噸。近年來中國V法鑄造形勢獨好，據(jù)統(tǒng)計2010年全國V法鑄造企業(yè)超過200余家，其中十余條是引進日本和德國真空密封造型線設備和技術。V法鑄造因鑄件表面質(zhì)量好、尺寸精度高，工藝操作簡便，金屬利用率高，生產(chǎn)成本低，適用范圍廣，在質(zhì)量、技術和經(jīng)濟效益方面有***的競爭優(yōu)勢。本文著重介紹V法鑄造生產(chǎn)過程﹑質(zhì)量控制和技術控制的措施和方法。揚州真空密封V法鑄造流程</p><p style="text-indent:25px">江陰華天科技開發(fā)有限公司是一家環(huán)保設備、氣力輸送設備、V法鑄造機械設備、消失模設備、樹脂砂設備、其他通用機械設備的技術開發(fā)、設計、制造、加工、銷售、安裝、調(diào)試、維修。產(chǎn)品與服務用于鋼鐵、有色、煤化工、石油化工、鐵路、食品、火電、鑄造等行業(yè)。的公司，是一家集研發(fā)、設計、生產(chǎn)和銷售為一體的專業(yè)化公司。公司自創(chuàng)立以來，投身于氣力輸送，V法鑄造，輸送機械，環(huán)保設備，是機械及行業(yè)設備的主力軍。江陰華天科技不斷開拓創(chuàng)新，追求出色，以技術為先導，以產(chǎn)品為平臺，以應用為重點，以服務為保證，不斷為客戶創(chuàng)造更高價值，提供更優(yōu)服務。江陰華天科技始終關注機械及行業(yè)設備行業(yè)。滿足市場需求，提高產(chǎn)品價值，是我們前行的力量。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2234846.html</p></div></div></div></div></div><div id="tmmw3zf" class="page-right twoColRt"><div id="y2um7ku" class="box01 margin10 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