The cold quantity calculation of injection molding machine cooling system and the cold water pause type:
1, cold quantity calculated according to the cylinder capacity
cylinder should the equipment quantity say Ming the detail reference number in the book, root according to heat transfer and type: Q = C * M * delta T * S calculated cold quantity, type of Q = cooling system required cold quantity kcal/h;
C = plastic materials heat kcal/kg ℃;
M = plastic raw material plasticizing capacity kg/h;
Delta T = melt temperature and the products of demoulding ℃ temperature difference;
S = safety factor (
Typically take 1.
35-2.
0)
。
when a single unit match choose small value;
Cold water machine fit with many sets of mould take great value.
for example, a pair of mold production of polyethylene products,
Volume heat 0.
55℃千卡/公斤)
, at the beginning of plastic end temperature is 200 ℃, plasticizing capacity is 21.
5g/s。
Q=C*M* △ T*S=0.
55 kcal ／ kg℃ *21.
5g/s*3600s *200℃ *1.
5/1000 = 12771千卡/ h = 14。
85kW(
The safety coefficient of 1.
5)
。
2, according to the clamping force estimation cold quantity
example: an injection molding machine models: UN90SK, clamping force 900 kn, injection molding machine can press the clamping force 80 t = 1 HP, 1 HP = 3 kw cooling capacity estimated 900/80 = 11.
25, 12 HP cold water machine, water
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