MAGUIRE Gravimetric Gateway LineMaster Installation Operation & Maintenance page 8

LineMaster
REDUCE RESIN CONSUMPTION WITH
ENHANCED GRAVIMETRIC EXTRUSION YIELD CONTROL
The diagram on the following page illustrates a 3-layer film line utilizing LineMaster
Control. Loss-in-weight hoppers are mounted on 3 extruders that are feeding the die producing the
film bubble. The loss-in-weight hoppers provide precise throughput data and an encoder (mounted
on nip rolls or any rotating shaft) provides line speed data. Any change in throughput due to
screen pack, back pressure, melt temperature or other variables is detected and adjusted for.
Typical process variations are reduced with LineMaster gravimetric control to within ± 0.5%,
significantly reducing resin consumption. Typically, 3 to 4% resin savings is realized resulting in
payback in as little as 6 months. LineMaster simplifies line start-up, enables rapid job changes and
reduces scrap during string-up.
LineMaster
Extruder Drive Speed Control – Model XCD-X
Take-off / Line Speed Control – Model XCD-T
TM
LineMaster Speed Control modules communicate directly with the XCC or blender controllers.
The controller receives process throughput updates from the loss-in-weight hopper and
commands the speed control modules to increase or decrease screw rpm.
The speed control modules provide a 0 – 10 Vdc analog signal to the extruder or take-off drive
being controlled. The XCD Speed Control Modules include a digital potentiometer, which replaces
the existing manual pot or can communicate with an existing digital speed control. A toggle switch
is included to provide selection of either Manual or Automatic control.
APPLICATIONS
Wood Composite
Corrugated
Pipe & Tubing
Wire & Cable
TM Encoder – Model XCE
Maguire Products, Inc.
TM Extrusion
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