| One ton of Mold Cooling is
equivalent to X #
per hour of ::
mold cooling example -
cycle 30 seconds, part 1
lb., HDPE
(3600/30) = 120 parts HR
120 parts * 1 lb = 120 #
per hr.HDPE
120# per hr / 30 = 4 tons
of cooling
Multiply tons by 2.4 for
minimum GPM
|
30# HDPE
35# LDPE AND PP
40# NYLON
50# PS or ABS
65# PVC or Poly Carb
70# PET
|
| Horse Power of Electric Motor driving
GPM of a Hydraulic pump multiplied by
".1"
will give the oil heat exchanger tonnage.
Multiply this by 3 for minimum GPM
|
example-
75 horsepower motor
75 *.1 = 7.5 tons
7.5 tons * 3 = 22.5 gpm
|
Other Equipment
- Feed throat of molding machine
|
1 ton above 400 ton
1/2 ton below 400 ton
|
|
|
.16 tons of
cooling per HP w/out after cooler
.2 tons of cooling per HP w/after cooler
|
|
|
1 ton of cooling for
every 10.5 KW of heaters |
- Pump HP
to drive continuous
60 gpm @2000 psi
60 * 2000 / 3000 = 48 HP
|
GPM * pressure (ft. head)
_____________________
3000
|
One Killowatt is equal to
- amps * volts
* .85 * 1.73 / 1000
- 1.34 HP
|
One PSI is equal to
|
1 gallon of water is equal to
- 8.33 pounds
- 231 cubic inches
|
1 cu ft water is equal to
|
| Cooling Tower Water Make up requirement |
2 % of flow rate untreated
1.5% of flow rate treated
|
