maximum distortion of measurement points was 0。225 mm。 There was A。 Melt Temp。 (oC) 320 310 300

discrepancy between measured and simulated values, which was caused B。 Mold Temp。 (oC) 120 100 80

by slipping of polymer molecules at the mold surface and simulation C。 Pack Press。 (Mpa) 180 160 140

errors of viscoelastic stress relaxation and thermal stress   distribution。 D。 Pack Time (Sec) 2。0 1。5 1。0

Table 3 Distortion values and S/N ratios

No。 Point 1 Point 2 Point 3 Point 4 Point 5 Point 6 Point 7 Point 8 Point 9 Avg。 S/N

1 0。010 0。009 0。015 0。012 0。009 0。015 0。010 0。008 0。015 0。030 28。033

2 0。001 0。003 0。008 0。000 0。004 0。011 0。001 0。004 0。012 0。042 24。076

3 0。002 0。009 0。004 0。005 0。010 0。009 0。003 0。009 0。013 0。060 21。158

4 0。034 0。007 0。051 0。035 0。007 0。048 0。034 0。004 0。046 0。032 27。577

5 0。030 0。058 0。055 0。031 0。058 0。053 0。029 0。053 0。052