Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 30)

A B
Tank
Clamp Ram (Screw)
P T
P T
Tank
A B
Clamp
Flow Valve
System
Flow Valve
Ram (Screw)
Directional
Valve
Tank
System
Pressure
Valve
Pump
P T
Tank
A B
Ejector
Ejector
Directional
Valve
P
Pressure
Sensor
12469ĆI
Overview of Inject, Clamp, and Eject Mode
Chapter 1
1-18
Example 3Ćvalve System with Ram (Screw) Pressure Sensor
With this hydraulic system, one QDC module in the Inject, Clamp, and
Eject mode, can control the following:
closed-loop pressure for injection, pack, hold, and plastication profiles
closed-loop velocity for injection profiles
open-loop pressure for clamp and ejector profiles
closed-loop velocity for clamp and ejector profiles
Figure 1.21
3ĆValve System for Inject and Clamp Control Example
QDC I/O: Designation
Input 1 Ram (Screw) Position
Input 2 System Pressure
Input 3 Clamp Position
Input 4 Ejector Pressure
Output 1 System Flow
Output 2 System Pressure
Output 3 Clamp Flow
Output 4 Not Used