Rockwell Automation 1746-BLM Blow Molding Module Installation Instructions - Manual (Page 11)

Blow-molding Module 11
Publication 1746-IN014B-EN-P - January 2001
Control of Continuous Extrusion Machines
The module controls parison wall thickness on continuous extrusion machines by
following a setpoint profile of wall thickness vs. time. The module is capable of
controlling up to four blow molding heads in this mode. Each of the module’s four
analog I/O channels is used for mandrel position control. Mandrel position is a
function of the elapsed time since the last synchronization signal, indicating start of
parison drop.
Servo Valve and
Hydraulic
Cylinder
LVDT
Valve
Amp
Servo Valve and
Hydraulic
Cylinder
LVDT
Valve
Amp Servo Valve and
Hydraulic
Cylinder
LVDT
Valve
Amp
Servo Valve and
Hydraulic
Cylinder
LVDT
Valve
Amp
1746-BLM
Module
Analog
Outputs
Analog
Outputs
Analog
Inputs
Analog
Inputs
parison
Digital
Sync Pulses
Digital
Sync Pulses
parison
mandrel
mandrel
mandrel mandrel