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href="http://www.cdcfah.com/cp/third-dzysjzpxb_dzsjlj/">電子塑膠零件</a>?青海尼龍注塑件無錫東英電子供應(yīng)</p><div id="gl8gy3s" class="leftbox clearfix"><h1>青海尼龍注塑件無錫東英電子供應(yīng)</h1><div id="fuwov92" class="proBig"><div id="hbsp2lf" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218588853779297/5617033.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="rbtahbn" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218588853779297/5617033.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="cmpkqf3" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>青海尼龍注塑件</p><p><span>***更新：</span>2020-06-08 01:18:38</p><p><span id="click" >瀏覽次數(shù)：16次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="8gszrtq" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">無錫東英電子有限公司</a></p><p><span>聯(lián)系人：</span>朱淇華</p><p><span>郵箱: </span>wxdydz@163.com</p><p><span>電話: </span>13921179070</p><p><span>傳真: </span>0510_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0510-83785478</p><p><span>地址: </span>江蘇省無錫市錫山區(qū)錫北鎮(zhèn)新壩村</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="hwoqnz2" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="xliaseb" class="box"><p><p> 在任何可能的地方，使用倒錐型注口拔針設(shè)計(jì)或“Z”型拔針，檢查“Z”型拔針是否在頂出過程中離開了模具，在“Z”型拔針的角上或流道和注口之前加上圓弧。F、注口套表面精度低劣。拋光注口內(nèi)部的表面。G、注口套直徑太小。增加注口的直徑。111．注塑件空穴起因及解決辦法描述：可能容易地在透明注塑件的“空氣阱”內(nèi)見到，但也可出現(xiàn)在不透明的塑料中。這與厚度有關(guān)，而且常因塑料收縮離開注塑件中心而引起?？赡艿钠鹨颍航ㄗh使用的補(bǔ)救方法：注塑機(jī)A、模具未充分填充。增加射料量。增加注塑壓力。增加螺桿向前時(shí)間。降低熔融溫度。降低或增加注塑速度。（例如對(duì)非結(jié)晶體類的塑料要增加45速度）。B、止流閥的不正常運(yùn)作。檢查止逆閥是否裂開或無法運(yùn)作。模具A，青海尼龍注塑件、使用的澆口太小，青海尼龍注塑件。增加澆口的尺寸以防止塑料在澆口處過早固化。B、流道的設(shè)計(jì)或尺寸不正確。使用圓形或梯形流道。增加流道直徑。C、澆口位置錯(cuò)誤。更改澆口的位置，青海尼龍注塑件，使塑料輸入模具**厚部分。D、模具溫度太低。增加模具溫度。E、模具內(nèi)排氣不足。在模具內(nèi)加工排氣孔或使用真空排氣。F、注塑件的壁位太厚。減去注塑件**厚的部分。塑料A、塑料含有過多水份。將塑料烘干更長的時(shí)間以減低塑料的含水量。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海尼龍注塑件" src="https://tyunfile.71360.com/WaterMark/UploadFile/dongying/637218588853779297/5617033.jpg"></div><p> 這時(shí)就需改變澆口的位置和數(shù)目例如成型長桿件時(shí)要從一端注入等。有時(shí)必需改變冷卻水道的配置；較長薄片類制件更容易變形，有時(shí)需變更制件的局部設(shè)計(jì)在其上翹一側(cè)的背面設(shè)置加強(qiáng)筋等．利用輔助工具冷卻來矯正這種變形大多是有效的。不能矯正時(shí)，就必須修正模具的設(shè)計(jì)了。其中，**重要的是應(yīng)注意使制品壁厚一致。在不得已的情況下，只好通過測量制品的變形，按相反的方向修正模具，加以校正。4、結(jié)晶性塑料縮率較大的樹脂，一般是結(jié)晶性樹脂（如聚甲醛、尼龍、聚丙烯、聚乙烯及PET樹脂等）比非結(jié)晶性樹脂（如PMMA樹脂、聚乙烯、聚苯乙烯、ABS樹脂及AS樹脂等）的變形大，另外，由于玻璃纖維增強(qiáng)樹脂具有纖維配向性，變形也大。由于融點(diǎn)溫度范圍狹窄多數(shù)產(chǎn)生變形，并且往往是難以修正的。結(jié)晶性塑料的結(jié)晶度隨冷卻速度的不同而變化，即急劇冷卻結(jié)晶度降低、成型收縮率減小，而緩慢冷卻結(jié)晶度升高、成型收縮率增大。結(jié)晶性塑料變形的特殊矯正法就是利用這—性質(zhì)。實(shí)際上使用的矯正法是使動(dòng)、靜模有一定的溫差。就是采取使翹曲的另一面產(chǎn)生應(yīng)變的溫度，即可矯正變形。有時(shí)這個(gè)溫差高達(dá)20℃以上，但必須十分均勻地分布。必須指出，在設(shè)計(jì)結(jié)晶性塑料成型制件及模具時(shí)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海尼龍注塑件" src="http://tyunfile.71360.com/UploadFile/dongying/637218859007841797/3008582.png"></div><p> 1、冷卻不充分或不均勻在未完全冷卻時(shí)頂出，頂桿的頂推力往往使成型制件變形，所以未充分冷卻就勉強(qiáng)脫模會(huì)產(chǎn)生變形。對(duì)策是在模腔內(nèi)充分冷卻，等完全硬化后方可頂出。也可以降低模具溫度、延長冷卻時(shí)間。然而，有的模具的局部冷卻不充分，在通常成型條件下還有時(shí)不能防止變形。這種情況應(yīng)考慮變更冷卻水的路徑、冷卻水道的位置或追加冷卻梢孔，尤其應(yīng)考慮不用水冷，采用空氣冷卻等方式。2、頂桿造成有的制件的脫模性不良，采用頂桿強(qiáng)行脫模而造成變形。對(duì)不易變形的塑料制件，這時(shí)不是產(chǎn)生變形而是產(chǎn)生裂紋。對(duì)于ABS和聚苯乙烯制件，這種變形是以被推項(xiàng)部位的發(fā)白表現(xiàn)出來(參照開裂、裂紋、微裂和發(fā)白)。其消除方法是改善模具的拋光、使其易于脫模，有時(shí)使用脫模劑也可改善脫模。**根本的改進(jìn)方法是研磨型芯、減小脫模阻力，或增大拔模斜度，在不易頂出部位增設(shè)頂桿等，而變更頂出方式則更重要。3、由成型應(yīng)變引起成型應(yīng)變?cè)斐傻淖冃沃饕怯沙尚褪湛s在方向上的差異、壁厚的變化所產(chǎn)生的。因此，提高模具溫度、提高熔料溫度、降低注射壓力、改善澆注系統(tǒng)的流動(dòng)條件等均可減小收縮率在方向上的差值?？墒牵蛔兏尚蜅l件大多難以矯正過來。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海尼龍注塑件" src="http://tyunfile.71360.com/UploadFile/dongying/637218859007851562/7412093.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/182527.html</p></div></div></div></div></div><div id="tnfhzgn" class="page-right twoColRt"><div 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