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擠出機(jī)與熔體齒輪泵的泵送方法
來源： 發(fā)布時間：2018-05-28 11:14:29 瀏覽次數(shù)：次
用單螺桿擠出機(jī)加工聚合物時，需要兼?zhèn)渌芑?、混煉性和計量泵送性三種功能，而且要求具有能夠控制加熱、冷卻的溫度，處理高粘度物料或混入原料等綜合能力。
活塞泵不能用于高粘度物料的泵送，因?yàn)樗鼤a(chǎn)生與螺桿偏擺相間的紊流脈動。所以，若要改善擠出機(jī)的性能，應(yīng)該配置齒輪泵。正排量熔體齒輪泵的特點(diǎn)是，能夠使物料象活塞泵一樣始終向一個方向幾乎無泄漏地排出。從進(jìn)料側(cè)來的塑化料由齒輪泵的兩齒輪的外傭傳送到料側(cè)。由于其嚙合緊密，因此物料不會從齒隙間回流，因而使出料側(cè)能定量地排出。顯而易見，只要調(diào)節(jié)熔體齒輪泵的轉(zhuǎn)速，就可以調(diào)節(jié)輸出量和擠出壓力。熔體齒輪泵的出料側(cè)的壓力與擠出模具的規(guī)格有關(guān)，而進(jìn)料側(cè)的壓力隨著擠出機(jī)擠出量和泵速的變化而變化。
將熔體齒輪泵安裝在擠出機(jī)和機(jī)頭之間后，擠出機(jī)就不需產(chǎn)生比模芯區(qū)節(jié)流阻力更高的背壓，只要具有連續(xù)進(jìn)行塑化、混煉、計量泵送料的機(jī)能即可，在較低的背壓下，即使螺桿高速運(yùn)轉(zhuǎn)也不會使螺桿和機(jī)筒之間的摩擦加劇。這樣使擠出機(jī)的有效擠出通增加，擠出效率提高。詳細(xì)了解關(guān)于熔體泵設(shè)備價格或者型號參數(shù)，請咨詢我們服務(wù)熱線：0371-67993077
鄭州巴特熔體泵有限公司
主營產(chǎn)品：計量泵、齒輪泵、熔體泵、高溫熔體泵、
熔體齒輪泵、熔體計量泵、化學(xué)泵、化工泵。
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