基于Moldflow的棘架套件浇注系统方案CAE分析

CAE Analysis of Spine Suite Gating System Planbased on Moldflow

基于对汽车座椅棘架套装塑件的结构和特点分析,运用Moldflow仿真软件确定了棘爪、棘轮的浇口位置,据此设计了4种注塑模具浇注系统设计方案,运用MPI软件对各方案进行了仿真填充分析,同时对填充时间、流动前沿温度、速度压力切换时的压力、熔接痕等进行了分析比较。确定成型汽车座椅棘架套装塑件制品最佳浇注系统方案是:棘爪采用2个点浇口对称分布于小半环中间、棘轮采用3个点浇口均布于加强环中间,并且一级分流道截面为梯形,二级分流道为圆锥;该优选方案注射时的锁模力为12.8349 t、注射压力58.483 MPa。经采用优选方案制造的模具使用表明:优选的浇注系统对棘架套装塑件注射模具结构设计有重要的参考价值,为注塑类产品浇注系统方案的设计提供了借鉴。

In according to the analysis of the structure and characteristics of the spine suite plastic parts in automobile seat, the pawl wheel and the gate location of pawl were both determined by the Moldflow simulation. Also, four schemes of the design of injection-molded gating system were suggested. MPI software was used for the filling analysis in those schemes. The effects of some typical parameters, such as the filling time, flow-front temperature, the velocity-pressure switched pressure, and the weld line were analyzed. The optimal gating system for the molding of spine suite plastic parts in automobile seat was determined. Firstly, the pawls were symmetrically positioned in the middle of the small semi-ring by the two point-point gating. The pawl wheels, however, were distributed at the middle of the stiffening ring by the three point-point gating. Secondly, the structures of trapezoid and cone were adopted as the cross section for the sub-channels of level 1 and 2 respectively. The clamping force was set to 12. 8349 t and the injection pressure was determined as 58. 483 MPa. The result showed that the optimal gating system could provide the valuable information and act as a reference on the design of the injection mold structure of the spine suite plastic part.