Pelletizer/Research Development

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Pelletizer
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Basics

  • This page aims to organise and conduct research on the Pelletizer.

Main Types of Pelletizers

Screw Based

  • Similar to a filament extruder, but with a rotating "cutter" on one end
  • Changing the speed of the cutter wheel changes the pellet length
  • Due to being able to seal the tube, and still run the screw, can higher densities be reached due to the increased pressure? Needs More Research
  • These have less throughput, so may not be the best option for large scale use, but better for home use perhaps

Die Based

  • Typically use a roller, and a sort of mesh/honecomb with the holes being the shape and dimention of the pellets
  • Powder is added to the top and is pushed through the mesh making pellets
  • VERY high throughput
  • Often unpressed powder mixed in output, so more post processing is needed such as a shaker grate
  • May have less pressure and thus lower density?
  • Also can pellet length be varied (perhaps swapping screen for one with longer "tubes"
    • OR some sort of dual mesh device with rotating wheels with holes, so it can be "sealed" like the screw extruder?

Walkthrough

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Wood Pelletizer
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Sawdust from Sawmill
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Grass Pellets
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Wood Pellets


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200px Roller die
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Pellet diagram
Roller Die

Existing Open Source Designs

French Site from 2022

Hello, I present to you my French site. I am mainly looking for how to build machines that can exploit the biomass of the high Pyrenean valleys, such as wood chippers and pellet presses. Cordially http://microressources.a4w.fr/ http://microressources.a4w.fr/fabriquer-ses-propres-granules-de-bois-avec-une-machine-a-pellet/

Precious Plastic

  • Odd idea, but could the Precious Plastic Extrusion Machine , or especially the pro version, be modified to handle non-plastic pellet making?
  • Main concern is dust getting where it shouldn't, but molten plastic is viscous, and tends to leak, so perhaps it will be fine?
  • Also are the required pressures reached?
  • Also a powder hopper, a stepper motor, and the cutting disk seem like the only additions needed

Industry Standards

  • Richi Pelletizer - [1]; wood - [2]

See Also

Useful Links


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Key Design Planning Prototype Almost done Full Release