Sieving Toner Powder

Requirement

To provide a machine suitable for the removal of any oversized product from black toner. In addition the unit needed to be easily dismantled for cleaning, and have seals which provided a dust tight arrangement without leakage. Company had already tried competitors’ machines without total success.

Operation

Fed from vacuum hopper loader unit above sieve. Discharge through floor into process line.

Solution

Farleygreene adapted a Sievmaster 700-ST High Speed unit for trial. The machine was fitted with a single screen sieve but with machined inner rings bonded to the original pans to provide a perfectly flat surface to seal, the spun pans appeared flat but the minor irregularities in the forming did not provide a sufficiently flat surface to seal. Additional clamps were also fitted to increase the seal clamping surface area. Triclover clamps were used to provide a sealed interface to the delivery and discharge outlets (subsequently changed for a specially made system).

The machine performed outstandingly providing a higher yield throughput than any other machine tested, even those who provided ultrasonic versions.
The machine was provided with a vacuum transfer hopper loader to transport the toner to the sieve. The whole assembly being mounted within a special mobile frame, allowing access from 3 sides.

Results

Customer received a turnkey solution to suit the problems he was experiencing, fitting into the existing production area with minimum modifications.

Key Facts

  • Fully sealed system with no exposed rotating parts
  • Separates oversize from fine material on a continuous basis
  • Separation of product into 3 grades
  • Wet, dry or liquid applications

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