新型注塑机合模机构内循环节能机理

Research on Novel Clamping Unit's Working Principle of Injection Molding Machine

精密和节能是注塑工业发展的必然趋势。针对精密型全液压注塑机移模过程中能耗大的特点,提出一种新型内循环二板式注塑机合模机构,其中关键部件内循环锁模液压缸在实现移模过程液压油内循环的同时也为移模动作的阻力系统,形成节能与耗能的矛盾系统。为深入理解内循环合模机构移模过程的能耗机理,建立内循环锁模液压缸内部液压油三维流动的数学模型及边界条件,利用计算流体动力学原理,采用动网格技术与有限体积法,并利用FLUENT中基于压力的求解器进行求解,得到移模过程中内循环液压缸内部液压油压力场及速度场分布,并考虑不同移模速度对它们的影响,由此揭示新型内循环二板式合模机构的节能机理。能耗试验表明,移模过程中锁模系统阻力小,该新型二板式合模机构能使全液压直压式注塑机跃升至一级节能注塑机的行列,解决了传统全液压直压式注塑机能耗大的问题。

Precision and energy-saving is the trend of injection molding industry.Because of the high energy consumption of conventional full hydraulic injection molding machine（IMM）during the molding-moving phase,a novel internal circulation two-platen IMM is proposed.The key component,internal circulation mold clamping cylinder,acts as the role of energy saving and mold moving resistance during the mold moving stage.To better understand the energy consumption principle of the internal circulation two-platen clamping unit during mold moving,the three dimensional numerical model and boundary condition is built in this study.The model equations are solved by the finite volume method and dynamic mesh by selecting pressure based solver of FLUENT.The pressure field and velocity field in the cylinder are obtained.The experiment results show that the resistance caused by the internal circulation cylinders during is small and the internal circulation two-platen clamping unit makes the machine rank the highest in terms of the energy-saving.