a.
To
start
The necessary power to start includes :

The power
for the setting of temperature of the mould and of the upper and
lower plates. This power is particularly important given that
temperature rises quickly.

The power to
balance losses by conduction, convection and radiation. During the
starting period, it is equal to 2/3 of the total losses of the permanent
regime.
P = (F1 + 2/3
F3) 1,1
Where :
F1 = heat for the
setting of temperature
F3= total of heat losses
1,1= coefficient of safety
P= (3711 + 2/3 x 2686) 1,1
Power to start = 6052 W
The working power is equal to :

The power to
heat plastic.

The power to
balance heat losses.
P
= (F2 +
F3) 1,1
Where :
F2 = power to heat plastic
F3 = power to balance heat
losses
1,1 = coefficient of security
P = (94 + 2686) 1,1