Pelletizer/Research Development
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Contents
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
Sawdust from Sawmill
Existing Open Source Designs
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
See Also
- Nick on the Pelletizer
- Pelletizer die and roller quote - Quote
- Kiln
Useful Links
- Chinese supplier of pelletizers
- Pellet Burners
- Images of Rollers and Dies
- Penn State on manufacturing fuel pellets
