Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 31)

Overview of Inject, Clamp, and Eject Mode
Chapter 1
1-19
Example 2Ćvalve System for Injection Control
with Clamp and Ejector Position Inputs
With this hydraulic system, the QDC module in the Inject, Clamp, and
Eject mode sends clamp and ejector position data to the PLC-5 processor.
The QDC module can control the following:
closed-loop pressure for injection, pack, hold, and plastication profiles
closed-loop velocity for injection profiles
The PLC-5 processor can control:
clamp and ejector hydraulic directional valves
other hydraulic and machine sequencing
Figure 1.22
2ĆValve System: Injection Control
(Clamp and Ejector Valves Controlled by Ladder Logic)
Tank
Ram (Screw)
A B
P T
Tank
Pressure
Control Valve
Flow
Control Valve
Pump 12470ĆI
QDC I/O: Designations
Input 1 Ram (Screw) Position
Input 2 System Pressure
Input 3 Clamp Position
Input 4 Ejector Position
Output 1 Injection Flow Control
Output 2 Injection Pressure Control
Output 3 Not Used
Output 4 Not Used