Mini J Head Nozzle

From RepRap
Revision as of 19:51, 6 June 2011 by Reifsnyderb (talk | contribs) (Introduction)
Jump to: navigation, search

This page is a development stub. Please enhance this page by adding information, cad files, nice big images, and well structured data!

Crystal Clear action run.png
Mini J-Head Nozzle

Release status: Concept

Mjhn unfinished prototype.JPG
Description
Mini J-Head Nozzle, Thermal Barrier, and Mounting Plate based on the J Head Nozzle.
License
GPL
Author
Contributors
Based-on
Categories
CAD Models
External Link


Introduction

NOTE: This page is under construction. More pictures, descriptions, etc., will become available when they are ready.


This nozzle has been designed as a drop-in replacement for the RepRap Universal Mini Extruder Nozzle.

Advantages

  • Internally, the filament path is identical to that of an already proven design.
  • If necessary, the PTFE liner can be replaced by using an off-the-shelf piece of PTFE tubing.
  • A resistor is used as a heater. There is no need to wrap nichrome wire.
  • Heat transmission is improved as there is no thermal junction where a separate heater screws onto the nozzle.
  • Since there are no press-fit parts, it is easier to disassemble.

Disadvantages

  • The brass nozzle requires considerable machining.

Parts List

Quantity Part Description
1 Brass Mini J-Head Nozzle Machined Brass Nozzle/Heater Combination
1 PEEK Insulator Machined PEEK Insulator
1 PTFE Liner 4mm OD, 2mm ID PTFE Tubing
1 PEEK Support Plate Insulator
1 Metal Support Plate
1 Heater Resistor Axial, 5.6 ohm, 1%, 5W (UB5C-5.6-ND)
1 Thermistor 100K (B57560G104F)

Machined Parts

Mini J-Head Nozzle

Material: Brass Bar Stock, 5/8" Square Or 5/8" x 1/2" Rectangular, ? Long

Note: The machining process can vary depending upon available machinery and tooling. The minimum machining requirements are a metal lathe with a 4-jaw independent chuck.

Thermal Barrier

Material: PEEK, 8mm Round

PTFE Liner

Material: PTFE tubing, 4mm OD, 2mm ID

  1. Cut an approximately 30 degree (or greater) taper on what will be the hot-end of the PTFE liner.

Assembly

Mjhn unfinished dis.JPG

Notes

General

Testing

Future Modifications

Pictures