Another aspect; if the print head was more tolerant for high temperatures, it might help to sort some of the problems now facing dual extrusion. Also, this would allow us to use broader range of materials - see for instance this thread:
I totally agree. The design needs to be updated. Having to change the Teflon bushing on an arbitrary basis is not satisfying.
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OK, I have GOT to try this. Turn an aluminum insulator with heat fins (like an E3D) and coat the inside with this
http://www.brownells.com/gunsmith-tools-supplies/metal-prep-coloring/paint-finishes/bake-on-aerosol-paints/teflon-moly-oven-cure-gun-finish-prod1145.aspx
Then use dual fans if I have still have problems with PLA prints... Or just have one of my machines ABS only with this insulator.
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