There is not real magic in the technology - Once you have a 3D CAD system that makes STL files, and a pro gramme to slice the STL file up into suitable thicknesses you have with an X/Y/Z plotter the entire system.
Most thermo plastics - that includes ground up milk containers, yogurt containers etc will melt at about 130 to 160 depending on the plastic so if you go the plastic or similar - e.g. sugar - rout you need a suitable nozzle heated to the correct temp and then put some pressure on the contents and move in X and Y.
Indeed if you are in a hurry you could cut the slices into 3mm thickness and cut out of something like plywood or MDF with a router.
There is a lot of promise but the Startrek replicator it is isn't quite - yet -
Oh, and the end product can be quite fragile.
And while I am throwing cold water on the idea it is VERY VERY SLOW.
this isn't "Star trek's" replicator...
but look similar to "Jurassic park's" Bone-builder polymeric printer
(remember the Velocirraptor's sound-maker cavity?)
Once I saw one "model-scale" maker machine, this device put one sheet of plastic over another and plotting the next surface, blow the debris away and one hot air nose slightly melt down the sheet to provide adhesion, over previous "pancake tower" of sheets, and start again with one new sheet.
I remember too the movie "5th element" when the machine "re-build" the gorgeous women slice by slice starting from one hand as DNA source...
Talking with some friend of mine, his wife working on a system to provide 3D construction tooths for a dental company (sorry, no mention allowed), so she build the tooth or part of them with one experimental 3axis device who "spout" one VERY-VERY smallest bubble of material over one "core" base small than the tooth, and "fill" the shape wanted.
Polymorph melts at about 60 deg C - At higher temps it will become fluid and difficult to handle - it tends to stick to everything like a glue.
Mmm maybe there is a use for that property!
It is also relatively expensive and if you are about to design a heated nozzle system anyway you may as well go for the normal thermo plastic range of 130 to 160 deg C. Then you can cut up plastic milk bottles or other scrap plastic articles and they provide free materials.
Typical thermo plastics: PET - Clear drinks bottles.
HDPS - yogurt cartons - plastic cups cheap pens.
LDPS - carrier bags - may be PVC as well.
ABS - Computer and printer and HiFI cases.
There are a lot of plastic item in our houses that are effectively rubbish - recycling makes sense.
Try this (British) site
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