Moldflow Plastics Insight Injection-Compression Molding Case Study ICM Compact Disc
Case Study § Injection molding vs. injection compression molding § Various analysis outputs § Benefits of analysis DESIGN SOLUTIONS
ICM Compact Disc Part Geometry Material: CD Grade Polycarbonate Thickness (mm) DESIGN SOLUTIONS
Process Conditions Injection Molding Process Conditions Fill time (s) Switch-over time (%) Post-fill time Pack/hold pressure (%) Melt temp. (F) Mold temp. (F) 0. 5 99 10 80 620 158 Additional Injection-Compression Process Conditions Press tonnage used (tons) 22 Press waiting time (s) 0. 52 Press open distance (mm) 0. 6 Press displacement vs. speed 0. 6 mm @ 1. 2 mm/s Press compression/packing time (s) 10 DESIGN SOLUTIONS
Analysis Results Unique to ICM § Same results as C-MOLD Filling & Post-filling § Additional X-Y plot results § § Press displacement Press speed Press force Cavity volume DESIGN SOLUTIONS
Press Displacement DESIGN SOLUTIONS
Press Speed DESIGN SOLUTIONS
Press Force DESIGN SOLUTIONS
Cavity Volume DESIGN SOLUTIONS
Frozen-in Shear Stress Injection-Compression Molding Injection Molding vs. § ICM results in lower frozen-in shear stress which produces better optical properties DESIGN SOLUTIONS
Part Displacement Injection Molding Injection-Compression Molding § ICM improves the dimensional stability of the part DESIGN SOLUTIONS