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Ejector control, 1ć13 – Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE User Manual

Page 25

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Overview of Inject, Clamp, and Eject Mode

Chapter 1

1-13

Figure 1.15

Example Open Slow

Open Slow

Clamp

Cylinder

Moving

Platen

L

0

Y

Velocity

Position

2

1

Stationary

Platen

Segments

Important: If you need only one open slow motion, configure only the 1st
segment of the open slow profile.

In this section, we describe the eject operation for expelling molded parts.
The operation consists of:

ejector

advance

ejector

retract

Figure 1.16

Clamp and Eject Portion of a Typical Machine Cycle

Inject

Open Slow

Low Pressure

Close

Clamp Close

Clamp Open

Ejector advance

Ejector retract

Ejector Advance

The QDC module starts advancing the ejector after detecting either one of
these events that you configure/program:

clamp position reaching a pre-determined setpoint
command from your PLC program

You may advance the ejector while the clamp is still opening the mold, or
wait until the mold is fully open.

Ejector Control