Calculation method for mold temperature control machine (constant temperature machine, mold temperature machine) 1. Special circumstances need to be calculated: A. Find heater power or refrigeration power KW=W×△t×C×S/860×T W = mold weight or cooling water KG t = temperature difference between the desired temperature and the starting temperature. C = specific hot oil (0.5), steel (0.11), water (1), plastic (0.45~0.55) B, the size of the pump Need to know the pump flow and pressure required by the customer (head) P (pressure Kg/cm2) = 0.1 × H (head M) × α (heat transfer media specific gravity, water = 1, oil = 0.7-0.9) L (media required flow rate L / min) = Q (heat required for mold Kcal / H) / C (media ratio hot water = oil = 0.45) × t (temperature difference between the circulating medium and the mold) × α × 60 2. Freezer capacity selection A, Q (freezing amount Kcal / H) = Q1 + Q2 Q1 (heat amount Kcal/H of raw material brought into the mold) = W (weight KG of raw material injected into the mold per hour) × C × (T1-T2) × S (safety factor 1.5 to 2) T1 temperature of the raw material in the material pipe; T2 temperature of the finished product when the mold is taken out Q2 Heat generated by hot runner Kcal/H B, speed algorithm (with hot runner not applicable) 1RT=7~8 OZ 1OZ=28.3g (including safety factor) 1RT=3024Kcal/H=12000BTU/H=3.751KW 1KW=860 Kcal/H 1 Kcal=3.97BTU 3. Cooling tower selection = A+B A, injection molding machine Cooling tower RT=injector horsepower (HP)×0.75KW×860Kcal×0.4÷3024 B, for freezer Cooling tower RT = freezer cold tons (HP) × 1.25