關于以上閥控電液系統有較大能量丟掉的不足，為進一步降低能耗，減少噪音，這些年塑料機械制造商為滿足客戶通過節能降低出產本錢的懇求，對各種節能控制技術進行了深化廣泛的研討和實踐，如德國、日本等國展開了運用變量泵和電液份額閥聯絡的負載感應型注塑機電液控制系統，作為電液控制中最底子的節能方法，已在國外被廣泛運用。現在在各種注塑機節能控制技術中，份額變量泵與變頻定量泵兩種節能控制系統，節能作用明顯。 
份額變量泵控制系統可以運用戶根據注塑成型技術懇求設定各種動作壓力、速度，并轉換成相應的仿照信號，輸給份額變量泵的份額壓力閥及份額流量閥，按設定值向系統輸出壓力和流量，使液壓系統能量輸出隨從注塑進程負載情況而改動，最大極限避免能量丟掉。變頻定量泵控制系統可以使液壓系統的能量輸出隨從注塑進程整機改動的負載情況而改動，在保壓、冷卻及空轉情況堅持很低轉速，然后到達節能目的。一同，使用注塑機同步信號及電氣控制系統，將電液份額控制系統仿照成負載跟蹤控制系統，將傳統定量泵改構成變頻變量泵，然后使溢流閥的回油流量降到最小，無高壓節省能量丟掉，然后將傳統有高壓節省的注塑機由耗能型晉級為節能型。

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