Heating power selection calculation method
Calculation Method of Mold Temperature Controller
1. Special circumstances need to be calculated:
A, seek heater power or refrigeration power KW = W × △ t × C × S / 860 × T
W = mold weight or cooling water KG
Δt = temperature difference between the desired temperature and the starting temperature.
C=specific heat oil (0.5), steel (0.11), water (1), plastic (0.45~0.55)
T=Time to warm up to required temperature (hours)
B. Find the size of the pump
Need to understand the customer's required pump flow and pressure (head)
P (pressure Kg/cm2) = 0.1 x H (head M) x α (specific gravity of heat transfer medium, water = 1, oil = 0.7-0.9)
L (media required flow L/min) = Q (heat required for mold Kcal / H) / C (media than hot water = 1 = 0.45 oil) × △ t (the temperature difference between circulating media into and out of the mold) × α × 60 < Br /> 2. Freezer capacity selection
A, Q (refrigeration amount Kcal/H)=Q1+Q2
Q1 (Kcal/H of heat introduced into the mold) = W (weight of raw material injected into the mold per hour KG) × C × (T1-T2) × S (safety factor 1.5 ~ 2) T1 raw material in the material pipe Temperature; temperature at which T2 finished product is taken out of the mold; heat generated by Q2 hot runner Kcal/H
B, fast algorithm (with hot runner not applicable)
1RT=7~8OZ1OZ=28.3g (including safety factor)
1RT=3024Kcal/H=12000BTU/H=3.751KW
1KW=860Kcal/H1Kcal=3.97BTU
3, cooling tower selection = A + B
A. Injection molding machine
Cooling tower RT = injection engine horsepower (HP) × 0.75 KW × 860 Kcal × 0.4 ÷ 3024
B、Freezer
Cooling tower RT = freezer cold ton (HP) x 1.25