全液压内循环二板式注塑机性能特点及锁模精度研究

全面深入地分析了新型全液压内循环二板式注塑机的性能特点,并对合模机构的锁模性能进行研究.新型二板式注塑机采用内循环式的舍模油缸,省去液压油外部循环过程并简化液压系统结构,节能、节材效果显著.移模和锁模动作分别采用不同油缸,解决了力与速度的关系,锁模特性优异,成型性能稳定性高.机器配备伺服电机驱动定量泵的动力系统,节能降耗,噪音低.合模机构锁模力的测试结果表明:2000 kN试验机台的锁模力符合设计要求;新型内循环二板式注塑机比同规格的肘杆三板机具有更优异的锁模性能,在最大锁模力情况时,前者比后者的锁模力重复精度高出0.33‰,为注射成型精密化提供保证.

Performance Characteristics and Clamping Force Accuracy of Internal Circulation Two-Plate Injection Molding Machine

The performance characteristics of newly full-hydraullc internal circulation two-plate injection molding machine were presented and the clamping property was especially investigated by experimental method. The external circulation was omitted and hydraulic system was simplified because of the internal circulation cylinders used in the new injection molding machine, thus significant energy saving and material saving. At the mold-moving or mold-locking stage, different cylinders were used respectively which not only balanced force and velocity but also obtained excellent mold-locking properties and high processing stability. The injection molding machine was equipped with servomotor which drived quantified pump in order to save energy and reduce noise. The testing results of clamping force showed that the actual clamping force of the 2000 kN experimental prototype reached the design value. The repeated accuracy of clamping force of two-plate injection molding machine was 0. 33‰ higher than that of conventional three-plate injection molding machine of the same size under the condition of the max clamping force, which provided important guarantee for the precise injection molding.