The cold quantity calculation of injection molding machine cooling system and the cold water type pause

by:CBFI     2020-10-04
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 industrial ice machine 36 kw refrigerating capacity can




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