Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 14)

Overview of Inject and Clamp Mode
Chapter 1
1-2
Clamp Phase: Description:
1st Close
2nd Close
3rd Close
You can program a singleĆstep clampĆclose profile and not use a second or third profile. Or, you can program up to
three clampĆclose profiles that let you do the following at up to three different points in the clampĆclose phase:
• pick up a third mold plate
• set cores
• pick up or drop out pumps to change clamp speed or pressure
Low Pressure Close To guard against damaging the mold when the two mold surfaces make contact and to detect obstructions to mold
closure, you close the mold slowly with low pressure and closedĆloop or openĆloop control. Low Pressure Close
can only be controlled through a pressure vs. position profile.
1st Open
2nd Open
3rd Open
You can program a singleĆstep clampĆopen profile and not use a second or third profile. Or, you can program up
to three clampĆopen profiles that let you do the following at up to three different points in the clampĆopen phase:
• drop out a third mold plate
• pull cores
• drop out or pick up pumps to change clamp speed or pressure
Open Slow To decelerate the moving platen to accurately position it before ejecting the part.
You control inject operation with these phases:
injection
transition
pack
hold
pre-decompression
plastication
post-decompression
Figure 1.1
Inject Operation of a Typical Machine Cycle
Injection Pack Hold
Post- Pre-
Decompression Decompression
Plastication
(Reload)
Transition to
Pack or Hold
Clamp
& Eject
Operation
Inject Control