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6 large commonly used injection molding basic parameters 计算公式, 请收 good!
图 injection molding machine structure 简图
1． clamping force F（TON） F=Am*Pv/1000
F: clamping force TON Am: mold cavity 投影面积 CM2 Pv: pressure KG/CM2 （ generally plastics material pressure in 150-350KG/CM2） （ flow property good relatively value, flow defect relatively high value ） 充填 pressure /0.4-0.6= injection shot pressure 例: mold cavity 投影面积 270CM2 充填 pressure 220KG/CM2 clamping force =270*220/1000=59.4TON
2． injection shot pressure Pi KG/CM2 Pi=P*A/Ao
Pi: injection shot pressure P: pressure A: injection shot has 效面积
Ao: screw 截面积 A= π*D2/4 D: 直径 π: rate 3.14159 例1: already 知泵浦 pressure injection shot pressure? 泵浦 pressure =75 KG/CM2 injection shot has 效面积=150CM2 screw 截面积=15.9CM2（∮45） Pi=75*150/15.9=707 KG/CM2 例2: already injection shot pressure 求泵浦 pressure? injection shot pressure =900 KG/CM2 injection shot has 效面积=150CM2 screw 截面积=15.9CM2（∮45） 泵浦 pressure P= Pi*Ao/A=900*15.9/150=95.4 KG/CM2
3． injection shot 容积 V CM3 V= π*Do2/4*ST
V: injection shot CM3 π: rate Do: screw CM
ST: injection shot CM 例: screw 直径 42mm injection shot 行程 165mm V= π*4.2*4.2/4*16.5=228.6CM3
injection molding 3D动画图
4． injection shot weight G Vw=V*η*δ
Vw: injection shot weight G V: injection shot 容积 η: specific gravity δ: machine efficiency
例: injection shot 容积=228.6 CM3 machine efficiency =0.85 specific gravity =0.92 injection shot weight Vw=228.6*0.85*0.92=178.7G
5． injection shot speed degree S CM/SEC S=Q/A
S: injection shot speed degree CM/SEC Qr: 泵浦吐出 amount （每回转/CC）CC/REV
A: injection shot has 效面积 CM2 Q=Qr*RPM/60 (每 separation 钟/L) Q: 泵浦吐出 amount RPM: 马达回转数/每 separation 钟 例: 马达转 speed 1000RPM 泵浦吐出 amount 85 CC/REV injection shot has 效面积 140 CM2 S=85*1000/60/140=10.1 CM/SEC
6． injection shot rate Sv G/SEC Sv=S*Ao
Sv: injection shot rate G/SEC S: injection shot speed degree CM/SEC Ao: screw 截面积
例: injection shot speed degree =10CM/SEC screw 直径∮42 面积=3.14159*4.2*4.2/4=13.85CM2 Sv=13.85*10=138.5G/SEC
