Calculation of several major elements of mold temperature machine：

A. Find the heater power or freezing 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 heat Oil (0.5), Steel (0.11), Water (1), Plastic (0.45~0.55)

B. Find the size of the pump

Need to know the pump flow and pressure (head) required by the customer

P(pressure Kg/cm2)=0.1×H(head M)×α (specific gravity of heat transfer medium, water = 1, oil = 0.7-0.9)

L (media required flow L/min) = Q (heat required by the mold Kcal/H) / C (media specific hot water = 1 oil = 0.45) ×t (temperature difference between the circulating media in and out of the mold) ×α× 60

2. Freezer capacity selection

 A, Q (freezing amount Kcal/H) = Q1 + Q2

Q1 (the heat of raw materials into the mold, Kcal/H) = W (the weight of raw materials injected into the mold per hour, KG) ×C× (T1-T2)×S (safety factor 1.5~2)

T1 The temperature of the raw material in the feed tube; T2 The temperature at which the finished product is taken out of the mold

Q2 Heat generated by the hot sprue, Kcal/H

B. Speed algorithm (not applicable with hot runner)

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 water tower selection = A+B

 A. For injection molding machine

Cooling water tower RT = injection machine horsepower (HP) × 0.75KW×860Kcal× 0.4÷3024

B. For freezers

Cooling water tower RT = freezer tons (HP) × 1.25

Dongguan Ice Universe Machinery Co., Ltd. (DIUM) 

 is a reliable supplier of quality industrial water cooled chiller and screw type chiller, oil type chiller, we have a big factory, and is the main suppliers of mobile air conditioner.

More industry refrigeration solutions welcome you to contact us.

Sincerely look forward to communicating with you and learning from each other.

Dongguan Ice Universe Machinery Co., Ltd. (DIUM)

service@evergrinding.com

Tony