Material Selection
材料選擇步驟
Material Selection
設計確認
模具製作 概念 應用需 求 建議設計 選擇材料 模型測試 確認設計
Material Selection Occurs at an Early Stage, Setting Direction for Design.
* UL/CSA
* FDA
* NSF
* FAA
* Medical Requirements
Material Selection Process
End Use Environment
@ Where will this be used ?
@ UV
@ Chemical
@ Weather
@ Hot water / steam
Mechanical , Thermal and Physical Properties
• Flexural Modulus • Heat Deflection Temperature ( HTD )
• UL Relative Thermal Index ( RTI )
• Notched IZOD Impact
Cut Design Time, Get it RIGHT the FIRST Tim
•特性 •機械強度 •熱性質 •防火性 •其他
工 程 應 用
•設計應用要求 •精密度 ( 尺寸,變型 --) •外觀性
工 程 管 理
•設備穩定度 •品質穩定度 •確定性 •判定選用 •其他
•成形性
•其他
Material Selection Process
What Conversion Process
@ Injection Molding
@ Thermoforming
@ Extrusion
@ Blow Molding
Material Selection Process
What Agency requirements ?
Material Selection Process
Assembly / Secondary ?
• Welding • Machining
• Painting
• Printing / Decorating
• Assembly
• Adhesive / Solvent Bonding
• …. etc
Material Selection Process
• Melt Flow Rate ( MFR )
• Shrinkage Rate
• Cost…. etc
Material Selection Process
Example:
Power Tool Field Case
Application Requirements: • Nominal Wall of 2 mm. • Maximum temperature of 125 oC • Automotive Chemical Environment • Pass Agency Requirements • Various Colors Available • Gloss Finish • Lubricity (for quality feel) • Durability • High Resistance to Bending at Room Temperature