2.3 Calculation of Mold Heating.

As you can see in the lis of mold temperatures, due to different materials, you need to set different mold temperatures.

How to calculate the right mold heating unit :

P = heat capacity (kw)
m = weght of mold (kg)
c = specific heat (kJ/kgK)
      steel C =  0.49
     Alumunium = 0.88



delta V = Vb  -  Va  (celcius)
Vb       = mold temperature during production
Va       = start up temperature of mold
t          = heating up time
s          = safety factor 1.1 - 1.3 for loss by radiation

                         1                 m  .  c  deltaV  .  s
P         =        ------      .     --------------------        kw
                      3600                      t

Example :  200 kg steel mold from 20 celcius (c) to 60 celcius (c) in 0.5 hour.

                         1               200 . 0.49 . 40 . 1.3
P         =        ------     .    ----------------------      kw
                      3600                      0.5
  
           =        0.000278 . 10192
           =        2.83 kw
           =        3 kw


<<HOME>>