Injection Molding Machine Chapter 4
V3.0
4-59
★
Confirm no unnecessary tools
，
foreign objects on the machine and circumference of the machine has
been cleaned without any litter.
★
Confirm barrel temperature has been proper set and cold start protection time has met the
requirement of the set value.
★
Confirm material hopper has been filled with sufficient plastic material.
5.3 Setting of molding condition
Ａ
Heater temperature control
：
(refer to page 4-24 of chapter 4 for setup).
Heating zones are : H1
，
H2
，
H3
，
H4
，
H5
，
H6(model above 350E )
，
usually
，
H1 has the
highest setting value
，
then
，
lowering in sequence to the lowest setting value of fifth zone.
Ｂ
Injection pressure
：
(refer to page 4-20 of chapter 4 for setup).
Injection pressure is divided into 9 sections of filling processes and 5 sections of holding processes.
Usually
，
in filling process set suitable injection pressure
，
while gradually decrease holding pressure in
holding process.
Ｃ
Injection speed
：
(refer to page 4-20 of chapter 4 for setup).
Injection speed is divided into 9 sections to control the speed for filling plastic material into the mold
，
usually
，
low speed is required before holding transfer point
，
then adjustment is depended on molding
condition.
Ｄ
Injection monitor time
：
(refer to page 4-204 of chapter 4 for setup).
It’s the time required for the screw advances from starting position of injection to holding transfer
position
，
usually injection monitor time must be set longer than the actual injection time
，
failure to
reach to the holding transfer position within the time will result in alarm.
Ｅ
Cooling time
：
(refer to page 4-20 of chapter 4 for setup).
Cooling time starts timing when injection finished
，
it varies with such factors as plastic material
，
injection speed
，
mold temperature
，
wall thickness of the molding product
，
adjustment is depending
on molding condition.
Ｆ
Charge speed
：
(refer to page 4-26 of chapter 4 for setup).
The faster the charge speed is
，
the higher of the shearing heat generated. However
，
if the speed is too
fast
，
the plasticizing condition and color-mixing ability will be lowered
，
if the speed is too slow
，
the
low shearing heat will result in insufficiency of plastic material heating thus making higher viscosity
for short shot. Therefore
，
in the beginning of operation
，
lower speed shall be set
，
then
，
adjustment shall
be made depending on molding condition.
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