How to calculate the clamping force

1. The standard calculation formula provided by Sumitomo of Japan:

clamping force = (proct area + runner area) cm2 x material coefficient kgf / cm2
the material coefficient is as follows:
PC as = 300-500 kgf / cm2
PA PP PE ABS = 400-600 kgf / cm2
POM PMMA = 600-1000 kgf / cm2
PC = 800-1200 kgf / cm2
when glass fiber (GF) is added 100-200kgc / cm2

2. I'm in a mold & book& lt; Practical course of injection mold design & gt& gt; The formula for calculating the clamping force is as follows:
clamping force ≥ bulging force ÷ 80%
bulging force = proct projection area × Cavity pressure (MPA) × Number of molar cavities

3. It's very troublesome to accurately calculate this thing. The approximate algorithm can be plastic molding area X cavity pressure. The cavity pressure depends on the proct, which is generally above 49 MPa

4. Hello
when we buy an injection molding machine, there are generally two sizes of the injection molding machine: one is the number of grams (the amount of melt adhesive); the other is the size of the injection molding machine; The second is the tonnage (maximum clamping force, i.e. clamping force * template area)
in this way, we can directly know the maximum clamping force of the injection molding machine through the tonnage of the injection molding machine, and then determine the clamping force
general injection molding machine manufacturers calculate the clamping force according to the maximum power of the oil pump * 85% efficiency, and then multiply it by the template area.

5. The pressure of the cavity is calculated according to the injection pressure of the injection molding machine

6. F(TON)=AM*PV/1000TON锁模力PV充填压力

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