Shanghai Daoqin Plastics Co., Ltd.

        1. clamping force F(TON) 公式:

        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)

         injection shot pressure =充填 pressure /0.4-0.6

        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)公式:

        Pi=P*A/Ao

        即: injection shot pressure =泵浦 pressure * injection shot has 效面积÷ screw 截面积

        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 =75KG/CM2 injection shot has 效面积=150CM2

         screw 截面积=15.9CM2(∮45mm) 公式: 2〒R2即: 3.1415*(45mm÷2)2=1589.5mm2

        Pi=75*150/15.9=707 KG/CM2

        例2: already injection shot pressure 求泵浦 pressure?

         injection shot pressure =900KG/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 V(CM3)公式:

        V= π*(1/2Do)2*ST

        即: injection shot 容积=3.1415* semi 径2* injection shot 行程

        V: injection shot CM3 π: rate 3.1415 Do: screw CM

        ST: injection shot CM

        例: screw 直径 42mm injection shot 行程 165mm

        V= π*(4.2÷2)2*16.5=228.6CM3

        4. injection shot weight Vw(g) 公式:

        Vw=V*η*δ

        即: injection shot weight = injection shot 容积* specific gravity * machine efficiency

        Vw: injection shot weight g V: injection shot 容积 η: specific gravity δ: machine efficiency

        例: injection shot 容积=228.6CM3 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)公式:

        S=Q/A

        即: injection shot speed degree =泵浦吐出 amount ÷ injection shot has 效面积

        S: injection shot speed degree CM/SEC

        A: injection shot has 效面积 CM2

        Q: 泵浦吐出 amount CC/REV公式: Q=Qr*RPM/60 (每 separation 钟/L)即: 泵浦吐出 amount =泵浦每转吐出 amount *马达回转数/每 separation 钟

        Qr: 泵浦每转吐出 amount (每回转/CC)

        RPM: 马达回转数/每 separation 钟

        例: 马达转 speed 1000RPM/每 separation 钟 泵浦每转吐出 amount 85 CC/RPM, injection shot has 效面积 140 CM2

        S=85*1000/60/140=10.1 CM/SEC

        6. injection shot rate Sv(G/SEC)公式:

        Sv=S*Ao

        即: injection shot rate = injection shot speed degree * screw 截面积

        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

        1. 理论出容积:(π/4=0.785)

        (1) screw 直径²*0.785* injection shot 行程=理论 injection shot 容积(cm³);

        (2)理论 injection shot 容积/0.785/ screw 直径= injection shot 行程(cm).

        2. injection shot weight

        理论 injection shot 容积* plastics specific gravity * injection shot 常数(0.95)理想= injection shot weight (gr);

        3. injection shot pressure

        (1) injection shot 缸面积²/ screw 面积²* system most large pressure (140kg/cm²)²= injection shot pressure (kg/cm²);

        (2) injection shot 缸直径²/ screw 直径²* system most large pressure (140kg/cm²)= injection shot pressure (kg/cm²);

        (3) material tube/pipe combined most large injection shot pressure *实际 use pressure (kg/cm²)/ system most large pressure (140kg/cm²)= injection shot pressure (kg/cm²).

        4. injection shot speed rate

        (1) screw 面积(cm²)* injection shot speed degree (cm/sec)= injection shot speed rate (cm³/sec);

        (2) screw 直径(cm²)*0.785* injection shot speed degree (cm/sec)= injection shot speed degree (cm³/sec).

        5. injection shot speed degree

        (1) injection shot speed rate (cm³/sec)/ screw 面积(cm²)= injection shot speed degree (cm/sec);

        (2)泵浦 mono 转容积(cc/rev)*马达转 speed (rev/sec)/60(秒)/ injection shot 面积(cm²)= injection shot speed degree (cm/sec).

        (马达转 speed RPM:60HZ------1150,50HZ-----958)

        6. injection shot 缸面积

        (1) injection shot pressure (kg/cm²)/ system most large pressure (140kg/cm²)* material tube/pipe 面积(cm²)= injection shot 缸面积(cm²);

        (2) mono 缸---(射缸直径²-柱塞直径²)*0.785= injection shot 缸面积(cm²);

         di 缸---(射缸直径²-柱塞直径²)*0.785*2= injection shot 缸面积(cm²).

        7. mono 转容积

         injection shot 缸面积(cm²)* injection shot speed degree (cm/sec)*60秒/马达转 speed =泵浦 mono 转容积(cc/sec), (马达转 speed RPM: 60HZ------1150,50HZ-----958)

        8. screw speed and pressure mono 转容积

        (1)泵浦 mono 转容积(cc/rec)*马达转 speed (RPM)/油 pressure mono 转容积= screw speed;

        (2)泵浦 mono 转容积(cc/rec)*马达转 speed (RPM)/ screw speed =油 pressure mono 转容积.

        9. injection shot pressure

        (1) system most large pressure (kg/cm²)* injection shot 缸面积(cm²)= injection shot pressure (kg);

        (2) injection shot pressure (kg/cm²)* screw 面积(cm²)= injection shot pressure (kg).

        10. and related mono 位换算

        (1)1盎司(oz)=28.375公克(gr);

        (2)1磅(ib)=16盎司(oz);

        (3)1公斤(kg)=2.2磅(ib);即: 1斤=1.1磅;

        (4)1磅(ib)=454公克(gr)=0.454公斤(kg).

        11. force

        (1)曲手式:

        关模缸面积(cm²)* system most large pressure (140kg/cm²)/1000*曲手放 large rate (20-50)=关模 force (Ton)

        (2) mono pressure 式:关注 injection molding lower

        关模缸面积(cm²)* system most large pressure (140kg/cm²)/1000=关模 force (Ton)

        12. 道柱直径 and force 公式

        道柱直径²(cm²)*0.785*杨氏系数(scm4约1000kg/cm²)*4=关模 force value (Ton).

        13. formed product 排列投影面积 and force 关系公式

         formed product 排列投影面积(寸²)* standards thick degree (1.5mm)/ formed product thick degree (mm)* use raw materials 常数/PS raw materials 常数(1)=关模 force (Ton);

        (1) formed product 排列投影面影以射入 gate is 圆心, long is semi 径计算出直径;排列直径²(寸²)*0.785= formed product 排列投影面积(寸²).

        (2) use raw materials 常数,以概略 experience value 计算,以 flow property poor ratio PS good is 1 below/following; ratio PS不 good is 1 above.如:

        ABS 1.05; AS 1.2; PMMA 1.3; PC 1.6; PBT 0.9;

        PP 0.7; PE 0.7-0.8; plastics 钢 0.8; NILON 0.7-0.9¨¨¨ and other.

         various raw materials separation different and other grade,宜 more understanding and.

        (3) and injection shot from toward formed product 部份之 requirements,如杯子 high degree large 约以投影面积 30%计算即 can.

        14. force

        托模缸面积(cm²)* system most large pressure (140kg/cm²)/1000=托模 force (Ton)

        15. power/electricity mono 位

        1马 force (HP)=0.754千瓦(KW);

        1千瓦(KW)=1.326马 force (HP)=1000瓦(W);

        1千瓦(KW)=1 degree electrical amount mono 位(1KW/Hr).

        16. large small and force 关系

        P= most large use pressure (如:125kg/cm².140kg/cm²);

        Q=油泵浦一 separation 钟吐出 amount (L/min);

        Q=油泵浦 mono 转容积(cc/rec)*马达转 speed (RPM)/1000=油泵浦一 separation 钟吐出 amount (L/min).

         suitable force:

        P*Q/540=HP;

        P*Q/612=KW.

         combined can drop speed most high pressure (LP):

        HP*450/Q=LP;

        KW*612/Q=LP.

        17. use power/electricity

        (马达容 amount + electrical hot amount +烘 dry machine amount)* use electrical 常数(约40%)=实际每 small use electrical amount (degree,KW/Hr).

        1: what is injection molding machine injection shot can force?

         injection shot can force = injection shot pressure (kg/cm2)× injection shot 容积(cm3)/1000

        2: what is injection molding machine injection shot force?

         injection shot force PW(KW)= injection shot pressure (kg/cm2)× injection shot rate (cm3/sec)×9.8×100%

        3: what is injection molding machine injection shot rate?

         injection shot rate V(cc/sec)=p/4×d2×g

        d2 material tube/pipe g: material density

        4: what is injection molding machine 射胶推 force?

        射胶推 force F(kgf)=p/4(D12-D22)×P×2

        D1: inner D2: active outer P: system pressure

        5: what is injection molding machine pressure?

        射胶 pressure P(kg/cm2)=[p/4×(D12-D22)×P×2]/(p/4×d2)

        6: what is injection molding machine can force?

        塑化 can force W(g/sec)=2.5×(d/2.54)2×(h/2.54)×N×S×1000/3600/2

        h= screw front deep (cm) S= raw materials density

        7: what is system pressure? and injection molding pressure has what is the difference?

         system pressure (kg/cm2)=油 pressure in setting most high as pressure

        8: injection shot speed degree?

        H: speed degree =距离/ time