Injection Molding Machine Chapter 6
V3.0
6-1
Chapter 6: Maintenance
Attention: Before doing any maintenance work，make sure the power supply is cut off.
1 Safety devices inspection
Upon machine starting，safety devices have to be inspected in detail thus ensuring the safety in machine
operation，safety devices are laid out as follows:
Drop bar and Scotch bar set
Hydraulic safety device
1.1 Electrical safety
LIMIT SWITCH controls front and rear safety gates，minimum and maximum mold thickness，and
inspection method is：
A) Open front/rear safety door in clamp side，inspect I/O 101，103 on I/O monitor screen，they must be
off（no highlighted），open front/rear safety door in injection side，inspect I/O 201，202 on I/O monitor
screen，they must be off.
B) Activate limit switch of minimum/maximum mold thickness，inspect I/O 111（min. mold thickness），
I/O 112（max. mold thickness）on I/O monitor screen，when limit switch is depressed，highlight of
the corresponding I/O disappeared.
C) Open the clamp side gate，emergency stop circuit will actuate，highlight of I/O 221 disappears.
D) Press front or rear emergency stop button to activate emergency stop circuit，highlight of I/O 221
disappeared.
1.2 Hydraulic safety
The front/rear safety door interlocking circuits control V35 directional valve，and V35 controls the
hydraulic safety logic valve on the clamp manifold.
Methodsr inspection is：
◇When front or rear safety door is opened，clamp cannot be closed.
◇Clamp cannot be closed with V35 unplugged.
1.3 Mechanical safety
Inspection methods for drop bar/scotch bar set，clamp safety guards，barrel guards are:
◇Open front safety gate，the drop bar set will drop on the scotch bar.
Close front safety gate，the drop bar set will rise thus getting away from the scotch bar.
◇Check tightness the fixing screw of clamp safety guards，barrel guards，etc.
To Next Page
Loading...