Thermoplast Extruder Variations
Revision as of 13:18, 18 January 2010 by TheOtherRob (talk | contribs)
Thermoplast Extruder Variations
Description | |
License | unknown
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Author | unknown
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Contributors | |
Based-on | |
Categories | Thermoplastic Extruder
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CAD Models | |
External Link |
Please do not add to this page. (It is slightly overcrowded as it is.)
This Page Contains multiple RepRap development projects and should be split up. Each individual project/design/improvement should have its own development page within an encompassing category.
Contents
Design
- Direct Drive -Does not use flexible steel cable
- No-support gear bush holder
- High-temperature heater design
- Very simple nozzle
- Nozzle valve
- Embedded bearings
- Hardware Store (HS) Extruder
- Geared - Goes slower, but provide more control on the amount extruded
- Grub Screw in lower end of PTFE Insulator to help hold the brass barrel when using higher temperatures
- Drive screw can be smooth for most of it's length. It reportedly only needs about 7 complete threads to dig in, the rest just add friction.
- Quick and dirty design - Needs more work
- Welding tip nozzle v2
- Welding tip nozzle v3
- Simple star screwdriver drive - works OK, needs refinement
- Coach Bolt Drive hack
Materials
Barrel
- Machined out of a brass bolt.
- Aluminum has been used successfully.
- Combination of stiff copper tubing and copper plate brazed together was used by Forrest Higgs.
Orifice
- Mechanical pencil tip was reported to have heating problems.
- 0.6mm MigMate Welding tips from Halfords (5 for 4.99) - work ok when drilled out to 3mm, premade 0.6mm nozzle with m5 thread
Barrel dielectric material
- Furnace cement is now the officially recommended material.
- Both High-Temp JB weld and bar-b-que paint degrade after a hundred hours or so.
Pump
Insulator
- Originally designed to be made from PTFE (Teflon
- PEEK (w/o fiberglass reinforcement is reported to work)
- Concrete has been reported not to work (tried by vik, who still hasn't supplied details)
- Drywall mud (shrinks and cracks horribly, tried by John Gilmore)