Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 23)

Overview of Inject, Clamp, and Eject Mode
Chapter 1
1-11
Figure 1.12
Example Low Pressure Close
Clamp
Cylinder
Moving
Platen
Low Pressure Close
Position
Pressure
L 0 X
Segments
1
2
Stationary
Platen
Important: If you need only one low pressure close segment, configure
the 1st segment of the low pressure close profile.
The QDC module notifies your PLC-5 program when this profile is
complete and automatically uses set-output values at the end of low
pressure close to build tonnage (hydraulic machine) or lockup your toggle
(toggle machine).
Clamp Open
You can open the mold fast with three profiles of the clamp open phase:
first open
second open
third open
You may select from these control modes:
velocity vs. position
pressure vs. position
Use clamp open to move the platen from the fully closed position (0) to
some position Y at relatively high velocity or pressure (Figure 1.13). Y is
close to your fully open position (L), yet far enough away for deceleration
into the open slow profile. This aids positioning accuracy at position (L).
Figure 1.13
Example Clamp Open
Position
Velocity
1st Open
Profile
2nd Open
Profile 3rd Open
Profile
L 0
Clamp
Cylinder
Moving
Platen
Y
Stationary
Platen