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POWDER FEED CONTROL SYSTEM AND METHOD

  • US 20180346261A1
  • Filed: 05/31/2017
  • Published: 12/06/2018
  • Est. Priority Date: 05/31/2017
  • Status: Active Grant
First Claim
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1. A powder feed rate control system comprising:

  • a hopper adapted to contain a powder and to maintain a hopper pressure;

    a carrier conduit delivering a carrier gas flow and having an orifice, said carrier gas flow conveying powder entering through the orifice at a powder feed rate;

    a differential pressure transducer comprising;

    a first pressure input associated with the hopper pressure; and

    a second pressure input associated with the carrier gas flow downstream of the hopper;

    said differential pressure transducer (PT) outputting a signal related to a differential pressure between the first pressure input and the second pressure input; and

    an electro-pneumatic regulator (EP) receiving the signal related to the differential pressure and adapted to communicate with a control.

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