Design of injection mould for smoke alarm shell based on CAE optimization
In response to the difficulties in setting gate location,demoulding local features,and requiring high molding accura-cy levels for smoke alarm shell plastic parts in mould design,and in order to achieve automated injection molding production of the plastic parts,firstly,on the basis of the technical route based on design for manufacturing analysis of the plastic parts,a feasibility analysis of the layout of mould structural components was carried out for the forming of the plastic parts.Then,CAE analysis methods were used to optimize the design of the gating and cooling system for the single cavity of mould cavity.In the optimized single cavity gating system,a single bull horn gate was used for gating.Under the condition of a gate diameter of 0.8 mm,the injec-tion time of the mould cavity is about 0.558 4 s,the filling pressure is about 30 MPa,the flow front temperature difference is 3.8℃,the gate freezing time is 11.57 s,the warpage deformation is less than 0.25 mm,and the injection cycle can be controlled within 36.65 s.The mould designed based on CAE analysis has a layout of 1 mould with 2 cavities,a cold runner two plate structure,and a single mould opening and single ejection.In the mould,a side core-pulling slider was used for forming and demoulding the side straight wall of the plastic parts to ensure the integrity of the appearance of the straight wall.For the situation where there were both side holes and inverted hooks in the local narrow space,a centralized demoulding design method was adopted to implement side core-pulling demolding using a lifter with multi forming feature.For the convenience of mould manufacturing,a temporary fixing screw was added on the slider to facilitate the repair of the parting surface of the slider during mould matching,in addition,pull rods were installed on the ejector plate to facilitate the installation of numerous ejection components on the ejector plate.
smoke alarmCAE analysisdesign for manufacturing analysis reportliftersliderejector sleeveinjec-tion moldingmould design
万方数据
维普
