Thermoplast Extruder Variations

Thermoplast Extruder Variations

Description
License	unknown
Author	unknown
Contributors
Based-on	Darwin
Categories	Thermoplastic Extruder 1.0
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.

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.

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)