Injection closed-loop system
must meet the ISO 11158 qualified hydraulic oil
with suggested viscosity of 15 to 45 mm2/s, viscosity
tolerance is no more than 400 mm2/s. Even though
one uses AW46 hydraulic oil grade, an extra high
pressure oil filter unit must be installed with
the pilot valve since the system requires higher
cleanliness hydraulic oil grade. Suggested oil
filter grade is β15?7515μm properly oil filter
(no side line design, and triggers the alarm if
oil is dirty). High pressure filter unit is also
required to be installed with the major valve.
Due to high requirement of oil cleanliness grade,
ISO 4406 < 19/16/13 is suggested, therefore,
one must install a normal direction valve to clean
all hydraulic system for a full day prior to the
servo control valve installation.
Injection closed-loop hydraulic system's response
speed and pressure are in direct ratio, and the
pilot pressure system must operates independently
and holds the pressure all the time. Common setting
is above 70 kg/cm2 as the high pressure in the
system. Middle pressure pump is 140 kg/cm2 and
high pressure pump is 280 kg/cm2, so the system
can respond quicker and stable each time. The
servo valve's external output drain line must
connect directly to the oil tank, and the servo
valve is better to be installed directly to the
cylinder manifold for quicker response and reduce
pressure loss.
This closed-loop control hydraulic system is
enabled with fast responsiveness and pressure
feedback function by using the exclusive computer
controlling system. Therefore, closed-loop control
hydraulic system is the best choice for products
that require high stability control. |
Standard
injection molding machine
Silicon
injection molding machine
P.E.T
injection molding machine
Bakelite
and melamine injection molding machine
Multi
color mixed injection molding machine
Acrylic
injection molding machine
Hard
PVC injection molding machine
Two
set double cylinder system for Injection machine
Gas
assist equipment