This is a 500% giant scale model of a PTFE Lined Creality Styl;e Hot End assembly for demostrating how a hot end works and how to fix common issues etc..
all parts fit together (some test fitting adjusting may be needed) and break away have cut aways to make seeing the inside workings easy.
you will need 16 10x3mm magnets.
Debur the magnet holes to aid insertion. debur all hole inserts to air insertion of parts together.
you may need to adjust the size of the heat break (in X and Y) to get a good fit so print the heat block and heat sink parts first. it should be a friction fit.
print the PTFE tube in VASE MODE and just print an inch of it and test fit into the heat break adjust as needed this should barely be a friction fit (otherwise it will go in and have a really hard time coming back out again as the friction surface area increases)
all of this will print on an Ender 3 sized printer or larger. a 200x200 printer can do it but you may have to shorten the heat break and won't be able to print a PTFE long enough.
I printed them in appropriate colors.
Ziro Bronze for the nozzle https://amzn.to/2T5nzHT
Esun PLA Pro Silver for the Steel parts https://amzn.to/2Was6ec
Transparent Red for the Heat Sink https://amzn.to/2MqChXt
White for the PTFE https://amzn.to/2RHsa6G
10x3 Magnets https://amzn.to/2T9qK1n