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塑膠管是如何做出來的？

文章出處：公司動(dòng)態(tài) 責(zé)任編輯：東莞市聯(lián)臻光電材料有限公司發(fā)表時(shí)間：2020-07-21

　　?塑膠管一般是以合成樹脂，也就是聚酯為原料、加入穩(wěn)定劑、潤滑劑、增塑劑等，以「擠塑」的方法在制管機(jī)內(nèi)經(jīng)擠壓加工而成，塑料管種類很多，分為熱塑性塑膠管和熱固性塑料管兩大類，屬于熱塑性的有聚氯乙烯管、聚乙烯管、聚丙烯管、聚甲醛管等；屬于熱固性的有酚塑料管等。塑膠管的主要優(yōu)點(diǎn)是耐蝕性能好、質(zhì)量輕、成型方便、加工容易，缺點(diǎn)是強(qiáng)度較低、耐熱性差。

塑膠管多采「擠塑」方式來制作，其工藝順序大致為：

①、生產(chǎn)流程原料+助劑配制 → 混合 → 輸送上料 → 強(qiáng)制喂料 →錐型雙螺桿擠出機(jī)→擠出模具→定徑套 → 噴淋真空定型箱 → 浸泡冷卻水箱 → 油墨印字機(jī) → 履帶牽引機(jī) → 抬刀切割機(jī) → 管材堆放架 → 成品檢測包裝。

②、擠出成形生產(chǎn)線：由擠出機(jī)、擠出模具、牽引裝置、冷卻定型裝置、切割或卷曲裝置、控制系統(tǒng)組成，

③、擠出機(jī)相當(dāng)于注射機(jī)的注射系統(tǒng)，它由料斗、料筒和螺桿組成。工作時(shí)螺桿在傳動(dòng)系統(tǒng)驅(qū)動(dòng)下轉(zhuǎn)動(dòng)，將塑料推向料筒中加熱塑化，在擠出機(jī)的前端裝有擠出模具（又稱機(jī)頭或口模），塑料在通過擠出模具時(shí)形成所需形狀的制件，再經(jīng)過冷卻定型處理就可以得到等截面的塑料型材。

④、如果擠出的中空管狀塑料不經(jīng)冷卻，將熱塑料管坯移入中空吹塑模具中向管內(nèi)吹入壓縮空氣，在壓縮空氣作用下，管坯膨脹并貼附在型腔壁上成形，經(jīng)過冷卻后即可獲得薄壁中空制品。

不僅是直管，甚至三通及其它連接管都是由模具來決定形狀。擠塑模具形狀不是圓的，安裝在擠出機(jī)的機(jī)頭鎖好就對(duì)了。
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