手機外殼的設計、製造及工藝Cheil Industries Inc. Design Guide for Thin Wall Product Design Guide For Thin Wall Products Design Concept Material selection Goal Thin wall Low weight Minimum Size Reduction of Cycle time High Productivity Saving Material Optimum Design Processing technology Cheil Industries Inc. R&D, Application Development Center 2 Last Updated DEC 07 1999 Design Guide For Thin Wall Products Material selection Requirement Thick Thin >200:1 High Flow Length High Impact Strength Good Appearance Stiffness Heat Resistance Mechanical Integrity Flame Resistance Resin Flow length: Spiral Flow(L/T) 100:1 ~ 150:1 Notch Izod Impact Test, Low Temperature Impact Test Low Gloss, UV Resistance: deltaE 1~2 Neat engineering Plastics: Flexural Modulus- 2,000MPa Reinforced plastics : Flexural Modulus……