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單螺桿擠出機(jī)熔體泵串聯(lián)擠出系統(tǒng)的性能與應(yīng)用（一）
來源：巴特計(jì)量泵、齒輪泵公司 發(fā)布時(shí)間：2013-11-06 09:47:28 瀏覽次數(shù)：次
上世紀(jì)80年代至90年代中，熔體泵擠出技術(shù)在工業(yè)發(fā)達(dá)國家取得了高速發(fā)展，它在塑料擠出加工業(yè)的應(yīng)用已涉及造粒、擠板（片、膜）、擠管、吹膜、擠出涂敷、型材擠出、連續(xù)吹塑等領(lǐng)域，加工的材料幾乎涉及所有的熱塑性樹脂、熱塑性彈性體及其它聚合物。廣泛采用熔體泵擠出技術(shù)已成為塑料擠出加工業(yè)的主流[1,2]。
近年來，國內(nèi)引進(jìn)的熔體泵擠出設(shè)備明顯增多。國內(nèi)開始注意應(yīng)用熔體泵擠出技術(shù)，熔體泵擠出設(shè)備的國產(chǎn)化現(xiàn)已起步，相關(guān)技術(shù)方面的科研開發(fā)工作也在進(jìn)行。但總體來看，無論是用量還是技術(shù)水準(zhǔn)，與發(fā)達(dá)國家相比都有很大差距。盡快縮短這方面的差距，還需國內(nèi)同行做相當(dāng)?shù)呐Α．?dāng)前，深入探討應(yīng)用熔體泵擠出技術(shù)的意義，將有助于加速這方面技術(shù)的開發(fā)與應(yīng)用。
將單螺桿擠出機(jī)與熔體泵串聯(lián)到一起使用（圖1所示），是應(yīng)用熔體泵擠出技術(shù)的一個(gè)主要領(lǐng)域。國外較多地稱其為熔體泵輔助擠出，將熔體泵放在從屬次要的地位。而在國內(nèi)，較普遍的認(rèn)為，只有當(dāng)使用單螺桿擠出機(jī)達(dá)不到擠出制品的公差要求時(shí),才有必要這 樣使用。即視串聯(lián)熔體泵僅是增加計(jì)量作用。本文將目前使用在擠出領(lǐng)域的這種組合體,定義為“單螺桿-熔體泵串聯(lián)擠出系統(tǒng)”,簡稱“SP系統(tǒng)”(Single2screw,Pump)。也可稱為“單螺桿-熔體泵串聯(lián)擠出機(jī)組”,或簡稱“SP機(jī)組”。提出這樣的概念,意在強(qiáng)調(diào)泵與螺桿組合起來的整體性與功能互補(bǔ)性,是兩者相輔相成而構(gòu)成了新的擠出系統(tǒng)。由此,從SP系統(tǒng)整體層面上來分析、評價(jià)其性能,客觀全面地認(rèn)知它的優(yōu)異之處,從而進(jìn)一步挖掘單螺桿擠出機(jī)的潛力,發(fā)揮熔體泵擠出技術(shù)的優(yōu)勢。我所近期研制出一臺(tái)小型SP機(jī)組,其主要設(shè)備技術(shù)參數(shù)是:螺桿直徑32mm、長徑比28、泵排量10cm3/轉(zhuǎn),簡稱SP32210。以下,結(jié)合我們的設(shè)計(jì)思想、實(shí)驗(yàn)工作及有關(guān)文獻(xiàn)資料,詳述SP系統(tǒng)的成因、性能與應(yīng)用。
單螺桿擠出機(jī)熔體泵串聯(lián)擠出系統(tǒng)的性能與應(yīng)用（二）
鄭州巴特熔體泵有限公司
主營產(chǎn)品：計(jì)量泵、齒輪泵、熔體泵、高溫熔體泵、
熔體齒輪泵、熔體計(jì)量泵、化學(xué)泵、化工泵。
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