mold design fundamental calculation battery cover
DESCRIPTION
asdasTRANSCRIPT
FormulaMOLD DESIGN FUNDAMENTAL CALCULATIONProductBATTERY COVERCode of ProjectMOT-009-NKD1Machine Clamping Force (Fc)Formula:Fc = P x A / 0.8A: Total Projection Area of product and runner (cm2)140P: Average Pressure inside cavity (kgf/cm2)260>>see Table 10.8: Safety Ratio0.8Fc: Injection Machine Clamping Force (kgf)50050MINIMUM = 50 TONTable 1. Injection PressureName of Plastic ResinResin Temp (C)Injection Pressure (kgf/cm2)Pressure Inside Cav. (kgf/cm2)Poly Ethylene (PE)180~130600~1400230~320Poly Propylene (PP)200~300600~1400220~320Poly Styrene (PS)180~315700~1700260~320Poly Carbonate (PC)280~320800~1500270~300Acrylonitrile Butadine Styrene (ABS)200~280700~1500330~440Poly Amide (PA)230~300800~1500240~4502Injection VolumeTotal Product Volume (cm3)32Ideal Injection Volume of Machine (cm3)45.73Gate DimensionTable 2. Flow CoeficientHigh FlowMiddle FlowLow Flown=0.6n=0.7n=0.8PSPOMPAPPPBTPVCPEPAPMMAASABSA. Side Gate DimensionFormula:h = n x tw = n x A / 30n: Flow coeficient0.6>>see Table 2t: Product thickness (mm)2.2V: Product volume (mm3)16047A: V/t7294.0909090909h: Height of gate (mm)1.32w: Width of gate (mm)1.70810900234Mold Base DimensionA. Pressure Plate Thickness (B)Formula:B = 5 x P x L x M^432 x E x L2 x Ymax1P: Injection Pressure Inside Cavity (kgf/cm2)280>>see Table 1L: Article Size (mm)170n: Number of Support Pillar Position4M: Distance between Spacer Blocks (mm)264E: Young Modulus of Elasticity (kgf/cm2)2100000Ymax1: Deflection of Plate (mm)0.01L2: Mold Move Length (mm)250B: Pressure Plate Thickness (mm)22.2468121913B. Wall Thickness (D)Formula:D1 =P x A x L^432 x E x B2 x Ymax2P: Injection Pressure Inside Cavity (kgf/cm2)280>>see Table 1A: Wall Depth (mm)15L: Article Size (mm)170E: Young Modulus of Elasticity (kgf/cm2)2100000B2: Mold Plate Thickness (mm)60Ymax2: Deflection of Wall (mm)0.05D1: Wall thickness (mm)25.913027109Formula:D2 =C x P x A^4E x Ymax2P: Injection Pressure Inside Cavity (kgf/cm2)280>>see Table 1A: Wall Depth (mm)15L: Article Size (mm)170L/A: Depth Ratio11.3333333333C: Depth Coeficient0.1>>see Table 3E: Young Modulus of Elasticity (kgf/cm2)2100000Ymax2: Deflection of Wall (mm)0.05D2: Wall Thickness (mm)2.381101578Table 3. Depth CoeficientL/ACL/AC1.00.0441.70.0961.10.0531.80.1021.20.0621.90.1061.30.0702.00.1111.40.0783.00.1341.50.0844.00.1401.60.0905.00.1425Spring Force for Ejector Plate (Fs1)Formula:Fs1 =W x vnh1: Thickness of Ejector Plate 1 (mm)25h2: Thickness of Ejector Plate 2 (mm)30w: Width of Ejector Plate (mm)260l: Length of Ejector Plate (mm)450W: Weight of Ejector Plate (kgf)50.193v: Safety factor1.4n: Number of Spring4s: Spring initial deflection10Fs1: Minimum Spring Force (kgf)17.56755k: Minimum Spring Constant (kgf/mm)1.7567556Spring Force for Slide Core (Fs2)Formula:Fs2 =W x vnW: Weight of Slide Core (kgf)2.842v: Safety factor2n: Number of Spring1s1: Spring Initial Deflection (mm)5Fs2: Minimum Spring Force (kgf)5.684k: Minimum Spring Constant (kgf/mm)1.13687Finger Pin Diameter (Da)Formula:Da =k x s2 x cos x L(Tb/v) x k: Spring constant (kgf/mm)1.1368s2: Spring final deflection (mm)15: Finger pin angle15L: Free length of finger pin (mm)80Tb: Bending stress of finger pin material (kgf/mm2)120v: Safety factor4Da: Finger pin diameter (mm)-2.22407728677Core Pulling DistanceS = H x Tan +2~3H=6.74H = Lenght required for slider(mm)S =13.1384978187 = Dip Angle Pin8Length Angular pinL = S/COS -8.8720642858
3333
TablePanjang (mm)Lebar (mm)Tebal (mm)Volume (mm)Berat (kg)Berat (Ton)ADP-PLT-110006004527000000210.60.2106SUP-PLT100045079.835910000280.0980.280098MLD-STA100045014063000000491.40.4914MLD-MOV100045017076500000596.70.5967SPC-BLC1000150100150000001170.117EJC-PLT-1100024630738000057.5640.057564EJC-PLT-2100024635861000067.1580.067158ADP-PLT-210006004527000000210.60.21062.03112
Sheet3