Gravifeed – Gravimentric loss-in-weight continuous blender for starve feed extruders

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freccia

Continuous gravimetric blender, designed to blend pellets, regrind and flakes in extrusion processes where key-factors are the dosing accuracy, and the capability to follow and compensate the variations of unstable processes.

MORE INFORMATION
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  • Vibratory Tray Feeder.
  • Each ingredient (mains and additives) is continuously metered by individual vibratory tray feeders.
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  • Therefore the system is suitable to feed pellets and also regrind and flakes, with a wide variety of bulk densitiesì and flowability.
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  • Self-supporting structure prearranged for vacuum receiver installation without additional supports.
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  • The on-board control box does not require any floor space.
  • Reduced installation costs. Complete wiring of the dosing unit is factory made.
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  • Quick and easy access to all parts for maintenance cleaning.
  • Clean out doors for fast removal of dust or ingredient residues and for visual inspection.
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  • Drain spout for quick and complete ingredient feed hopper emptying.
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  • Dedicated standard weights kit for load cells calibration.
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Extrusion control with starve feeding extruders

  • Operator inputs the Melt Pressure Set‐Point (PSP) by the HMI
  • Being the melt pump pressure directly related to the line total throughput (kg/h), Line Control system converts the PSP into a Troughput Set‐Point (TSP) and the TSP is sent, as an input, to the GRAVIFEED
  • The Line Control system gets the melt Pressure Present‐Value (PPV) from the melt pump
  • The Line Control system converts PPV) into the relevant Troughput Present‐Value (TPV)
  • TPV is sent, as an input, to the GRAVIFEED
  • The GRAVIFEED adjusts the throughput of each component:
    – to keep the receipt
    – to adjust TPV = TSP and keep therefore PPV= PSP
  • On the throat of the processing machine
  • On a mezzanine, to feed by gravity the supply hopper of the processing machine
  • On a vacuum take-off stand, to feed one or more processing machineas blending station
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Dust proof cabin (optional)

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networking

WIDE RANGE OF NETWORKING OPTIONS FOR REMOTE CONTROL AND DATA ACQUISITION

 

  • OPC via Ethernet (one entry-point)
  • OPC via CanBus (one entry-point or multi entry-point)
  • ModBus TCP/IP (one entry-point)
  • RS485/422 ModBus (one entry-point or multi entry-point)
  • Profibus (one entry-point or multi entry-point)
  • CanBus (one entry-point or multi entry-point)
  • Profinet (one entry-point)
  • Ethernet I/P (one entry point)

icona_doc_giallo   Brochure

 

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