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Color measurement under pressure in the extruder

Sensor system for precise color measurement under pressure in the extruder

During the production of solid or viscous masses such as gelatin, syrup and plastics, the mass is continuously compressed in the extruder and pressed out as a strand (extrudate).

When extruding, it is important that the material does not become too hot, as this will result in undesirable coloration (burning). Therefore, the color is measured directly at various points in the extruder. This can be done in transmission for transparent masses such as gelatin or in reflection for opaque masses such as plastic.

The application is solved using a CFS4-T150-P200 reflex sensor or a CFS3-T150-P200 transmission sensor, which are installed directly in the extruder. The CFS4-S-E-T250 reflex sensor is also available in the M12 design. Here, the color of the compound is measured directly on the inner wall of the extruder at up to < 200 bar pressure and < 250 °C. The measurement results are processed further for process control purposes.

The smart and precise color sensors of the colorSENSOR series from Micro-Epsilon are characterized by their high color accuracy and repeatability. They are intended for 100% inline monitoring, as they precisely detect even the smallest color differences and allow for immediate intervention during operation. Up to 320 colors in 254 color groups can be taught in. Operation is intuitive via the web-based interface. The attractive sensor system for precise color measurement in the extruder (article number 10235604, 10235605 and 10235606) consists of the CFO200 controller and a CFS4-T150-P200, CFS3-T150-P200 or CFS4-S-E-T250 sensor. This combination impresses both by the high accuracy and the attractive price-performance ratio.

System design

  • Controller: colorSENSOR CFO200
  • Reflective sensor: CFS4-T150-P200 (20UNF)
  • Transmission sensor: CFS3-T150-P200 (20UNF)
  • Reflective sensor: CFS4-S-E-T250 (M12)

Advantages:

  • Sensors directly in the extruder with 
    ½
    "-20UNF or M12 fit
  • Pressure-resistant < 200 bar
  • Temperature-resistant < 250 °C
  • High repeatability ΔE < 0.3
  • Multi-teach function and formation of color groups
  • Modern, user-friendly web interface
  • High color accuracy
  • Quick and easy integration of the system, even in existing systems
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Color measurement under pressure in the extruder

Tutorials

colorSENSOR CFO 100/200/250

Micro Epsilon Logo
Sensor Operation with Keys

colorSENSOR CFO 100/200/250

Micro Epsilon Logo
Teaching Colors using the Web-Interface

colorSENSOR CFO 100/200/250

Micro Epsilon Logo
Sensor Heads and their Mounting
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