@MarK,
I'm also planning on doing 3d printing with robots, may be these links might help:
* https://massivedimension.com/products/mdpe10-massive-dimension-direct-print-particle-extruder
* https://dyzedesign.com/pulsar-pellet-extruder/
* https://ceadgroup.com/wp-content/uploads/2019/09/FOLDER-RE.pdf
* https://www.cosineadditive.com/en/extruders
* https://rev3rd.com/pellet-extruders/
cheerio!
I'm also planning on doing 3d printing with robots, may be these links might help:
* https://massivedimension.com/products/mdpe10-massive-dimension-direct-print-particle-extruder
* https://dyzedesign.com/pulsar-pellet-extruder/
* https://ceadgroup.com/wp-content/uploads/2019/09/FOLDER-RE.pdf
* https://www.cosineadditive.com/en/extruders
* https://rev3rd.com/pellet-extruders/
cheerio!