Extruder control options

EPIC-III Extrusion System Control
An EPIC-III HMI Control Station

Extrusion lines are often run with discrete controls, separate controls for temperature, screw speed, and for each piece of downstreme equipment. Top of the line systems are all encompassing, but can be overkill for a typical processor. Data gathering and central control are becoming more desirable, and there are a number of options available.

 

 

 


 Davis-Standard Logo

A very attractive intermediate approach control systems is put out by Davis-Standard, and is called the TPC Control system.

Davis-Standard Extrusion Sustem Controller

Davis-Standard TPC Control in an optional swing arm cabinet

 

This system will tie control of primary downstream functions together, along with the extruder control, into a single panel. You can control pullers, saws, and melt pumps all from the central Touch Screen Control panel. The cost is very reasonable because the focus in on simplifying the system control and coordination. The base offfering, does not have excessive recipe storage, great for those who do not need that storage, or historical data storage and reporting. Some of that is available as an option, but the real strength of the system is a reasonably priced, reliable system control package.

Control Description

DS-TPC (Davis-Standard – Touch Panel Control)

The DS-TPC provides a touch panel solution to replace discrete temperature controllers, temperature indicators, pressure indicators, pressure controllers, drive operators, and drive indicators. The DS-TPC includes a 12.1 inch color touch screen with built in PLC processor, subpanel mounted multi-loop temperature control, and PLC I/O modules required for the system.

The DS-TPC is designed to offer touch-screen control – at a price similar to discrete devices performing the same functions. This is accomplished through the use of fixed hardware components and preconfigured engineering solutions.

Standard features common to all DS-TPC systems include the following:

·12.1″ Color HMI mounted in the extruder control panel ·Extruder 1 melt temperature indication ·Extruder 1 drive controls including speed and load indication ·Extruder 1 breaker plate pressure monitor including 2 alarms ·Auxiliary drive control including speed indication – can be used to coordinate a puller ·2 Water tank temperature indications ·1 temperature indication ·Vacuum tank level monitor ·Gauge thickness monitor ·Cold start inhibit – Barrel only ·10 Recipes (temperature only)

In addition, a system can optionally be configured to include the following features:

·DS-TPC HMI mounted in optional swing arm enclosure ·Control of _ heat/cool zones for extruder 1 ·Control of _ heat/cool zones for extruder 2 ·Control of _ heat only zones for extruder 1 ·Control of _ heat only zones for extruder 2 ·Extruder 1 drive pressure control from die pressure (not breaker plate pressure) ·Extruder 1 melt pump control ·Extruder 2 melt temperature indication Including melt pump in and out pressures ·Extruder 2 drive controls including Speed and Load Indication ·Extruder 2 breaker plate pressure monitor including 2 alarms 

DS-TPC (Davis-Standard – Touch Panel Control)

The DS-TPC provides a touch panel solution to replace discrete temperature controllers, temperature indicators, pressure indicators, pressure controllers, drive operators, and drive indicators. The DS-TPC includes a 12.1 inch color touch screen with built in PLC processor, subpanel mounted multi-loop temperature control, and PLC I/O modules required for the system.

The DS-TPC is designed to offer touch-screen control – at a price similar to discrete devices performing the same functions. This is accomplished through the use of fixed hardware components and preconfigured engineering solutions.

Standard features common to all DS-TPC systems include the following:

·12.1″ Color HMI mounted in the extruder control panel
·Extruder 1 melt temperature indication
·Extruder 1 drive controls including speed and load indication
·Extruder 1 breaker plate pressure monitor including 2 alarms
·Auxiliary drive control including speed indication – can be used to coordinate a puller
·2 Water tank temperature indications
·1 temperature indication
·Vacuum tank level monitor
·Gauge thickness monitor
·Cold start inhibit – Barrel only
·10 Recipes (temperature only)

In addition, a system can optionally be configured to include the following features:

·DS-TPC HMI mounted in optional swing arm enclosure
·Control of _ heat/cool zones for extruder 1
·Control of _ heat/cool zones for extruder 2
·Control of _ heat only zones for extruder 1
·Control of _ heat only zones for extruder 2
·Extruder 1 drive pressure control from die pressure (not breaker plate pressure)
·Extruder 1 melt pump control
·Extruder 2 melt temperature indication Including melt pump in and out pressures
·Extruder 2 drive controls including Speed and Load Indication
·Extruder 2 breaker plate pressure monitor including 2 alarms
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 Mesa III
 Epic III
 

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