moldflow 改善产品变形问题

1、1. Project Summary22. Plastic material information - 3 3. Analysis purpose & Process condition 44. Part information, Runner and cooling system design 685. Analysis result9276. Conclusion & suggestion 28Mold Flow Report1Mold Flow Reportcase1case2Mold NO：Prepared by: Bill.Bin Cavity number:1*2Analysis

2、 purpose : improve warpage。Analysis Project:Cool +Fill +Pack + WarpCase1 is the 3D design. Case2 is revise mold design and modified the process condition.2Material PropertyViscosity vs Shear rateP-V-TABS Polylac PA-737 Manufacturer : Chi Mei Corporation1. Melt Density : 0.96055g/cu.cm8. Melt Tempera

3、ture Maximum 240 deg.C2. Solid Density : 1.0494g/cu.cm9. Mold Temperature Minimum 40deg.C3. Ejection Temperature 90 deg.C10. Mold Temperature Maximum 80deg.C4. Recommended Mold 60 deg.C11. Maximum Shear Rate 50000 1/s5. Recommended Melt Temperature 220deg.C12. Maximum Shear Stress 0. 5 Mpa6. Filler

4、unfilled13. Thermal conductivity 0.19(k)w/m.c7. Melt Temperature Minimum 200deg.C14. Measured MFR 3 g/10min(5kg/200.C)3Process settingAnalysis purpose: improve warpageAnalysis Project:Cooling + flow + WarpageProcess settingcase1Mold Temperature:60/65Melt Temperature: 220 Fill Time: automaticCooling

5、time:60SV/P switch-over: 99% of filled volumepack80%V/P 10Scase280%X0.3+0X1.5+6X60%+12X100%S4Part infomatiomThickness distribution5Cooling system designAll case is base 2d mold design.6Runner system designCase1 is base 2d mold design ，12mm10mm8mm2.88mm102.8mmcase17Runner system designcase2Same case1

6、Same case1Same case1case2 is reviser runner system (move gate )Move gate8Fill TimeThe fill time result shows the position of the flow front at regular , as the cavity fills. Each color contour represent the parts of the mold Which were being filled at same time.The fill time is about 5.6 second in t

7、he model . No racetrack effect occur. Air trap appear on the last filled area. Do set enough vent over there.case2case19Fill TimeThe fill time result shows the position of the flow front at regular , as the cavity fills. Each color contour represent the parts of the mold Which were being filled at s

8、ame time.The fill time is about 5.6 second in the model . No racetrack effect occur. Air trap appear on the last filled area. Do set enough vent over there.case2case110Pressure at V/P switchoverThe result shows the pressure distribution through the flow path inside the mold at the Switchover point f

9、rom velocity to pressure control.case1case211Air TrapThe air traps are show in pink nodecase1case212Air TrapThe air traps are show in pink nodecase1case213Weld line Notice the positions of the weld lines, which may affect the qualing of the part appearance but which maybe affect the part structural

10、functions.case1case214 波前温度The melt temperature is 220, this themperature at flow front is allow. case1case215Pressure at injection location :XY PlotThe result shows the pressure and clamp force at various times during the filling and packing phases of the analysis.case1case216Clamp force: XY PlotTh

11、e result shows the pressure and clamp force at various times during the filling and packing phases of the analysis.case1case217circuit coolant temperatureThe cooling analysis screen output contains the change in coolant temperature from coolant-into coolant-out If the increase is unacceptable (great

12、er than 2-3 deg.c)case1case218Time to freezeThe result shows the thickness of the frozen. A higher value represents a thicker frozen layer, while low value means a thinner polymer melt (flow )layer Cooing channel need to near sprue , for reduce cycle time.case2case119Temperature mold The temperature

13、 mold result shows the average temperature of the plastic mold interface at the top side, of the mold element during the cycle time . The result displays in the mold surface has a small range.case2case120Volumetric Shrinkage at EjectionThe Volumetric shrinkage at ejection result can be used to detect sink marks on the model. Volumetric shrinkage should be uniform across the whole part to reduce warpage.High shrin