3.8.3 Calculation examples
Example 1:
Single MCBalance unit, injection molding. Shotweight = 150gr, AddV = 5%
AddV = 150gr * 5% = 7,5gr
Virgin = 150gr – 7,5 gr = 142,5gr
Example 2:
Double MCBalance unit, injection molding. Shotweight = 250gr, AddV = 5%, Regrind = 25%
Regrind = 250gr * 25% = 62,5gr
AddV = (250gr – 62,5gr) * 5% = 9,4gr
Virgin = 250gr – 62,5gr – 9,4gr = 178,1 gr
Example 3:
Triple MCBalance, shotweight 180gr, AddV = 2%, Add = 1%, Regrind = 20%
Regrind = 180gr * 20% = 36gr
Add = 180gr * 1% = 1,8gr
AddV = (180gr – 36gr) * 2% = 2,9gr
Virgin = 180gr – 36gr – 1,8gr – 2,9gr = 139,3gr
Example 4:
3 component MCHybrid Batch weight = 500gr, C1 = Vrigin, C2 = 20% Regrind, C3 = 5% AddV
1 MCBalance inline dosing AddV = 2%.
Shotweight 100gr.
The mix to the injection molding machine will contain:
Regrind = 100gr * 20% = 20gr
AddV = (100gr – 20gr) * 5% = 4gr
AddV = (100gr – 20gr) * 2% = 1,6gr
Virgin = 100gr – 20gr – 4gr – 1,6gr = 74,4gr
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