Crispy HotEnd
Contents
A Bit of Background
This HotEnd was developed after struggling with the fact that in Argentina (were I live) PEEK is very hard to come by, very expensive and a controlled material (since it can be used to manufacture guns).
Therefore, I went and designed a PEEK-free HotEnd.
Since PTFE is available and fairly cheap, I started to work on building a HotEnd based on that insulation.
PTFE is easy to work with, threads don't last much and are quite fragile, to solve this I went on and designed a "contained" PTFE insulation.
I took some ideas from the Budaschnozzle (which I tried, unsuccessfully, to build replacing PEEK with PTFE)
I'm a Hobbyist Lathe operator, so a lot is done on my lathe. That's a lot of help and makes this cheap.
I Hope some people out there find it useful.
Gustavo "Crispy" Blanco
The Crispy HotEnd
The HotEnd Disassembled
BOM (Build of Materials)
The Built
Tipically I star with the Barrel.
It's a 50mm 12mm Aluminum round bar which it turn to 8mm in diameter for 45mm, and make those 45 mm a 8x1.25 Thread.
Next, I take a piece of 1" (or 25mm) Aluminum Pipe and cut a 25mm long section. On the Lathe and with a piece o 25mm PTFE, turn it so you can fill the pipe (try to get it tight). With a 6.75mm Drill bit, drill the PTFE (at least 30mm deep). Then with a 12mm Drill bit, drill 18mm into the PTFE
Now take the 12mm PTFE and brill a 3.2 hole, drill it all the way.
Now, insert the Barrel into the large PTFE section, using the largest hole, and screw it tight.
And the small PTFE to enclose the barrel.
Complete the Mid Assembly by adding the parts in order.
Now to Finish he Bottom Section, add the Heater Block and Nozzle