3D filament extruder

Low-tech with Refugees - Low-tech & Réfugiés

https://wiki.lowtechlab.org/wiki/Extrudeuse_de_filament_3D/en

Dernière modification le 16/08/2024

Difficulté

Medium Moyen

Durée

20 hour(s) heure(s)

Coût

30 EUR (€)

Description

The aim of this system is to recycle plastic bottles into filament for a 3D printer. (not yet finished)

Sommaire

Imprimante 3D, Filament, bouteille

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Matériaux

-Wooden board 50cm x 70cm x 10mm

-3D printer filament

-Wood screws diameter M2 and L = 8mm

-Metal screws diameter M3

-Metal bracket

-2 Ball bearings Dint 6mm, Dext 20mm, Thickness 6mm

-2 M4 diameter CHC screws

-1 3D printer nozzle with heating part

-1 Arduino

-1 transistor

-Arduino cables

- 3 x 8 mm nuts

- 3 x 8mm washers

- 1 empty reel

- 8mm dowel, 15cm long

- 4mm dowel, 7 cm long

- 2 4mm diameter nuts

- 2 4mm diameter washers

- 10mm PVC tube, 30cm long

- 10cm long wooden prism (3x3cm)

- Polystyrène

- 5cm of end or electrical cable

Outils

-Clamp

-3D Printer

-Screwdriver

- Screwing machine

- 4mm and 20mm wood drill bits

- Metal drills

Étape 1 - Creating the support for the system

You'll need a 50cm x 70cm board.

Required thickness 10mm.

Étape 2 - 3D printing of the ‘bottle cut-out’ section

Print the part in STL

Link to 3D file: https://www.thingiverse.com/thing:6482361

Étape 3 - Insert the ball bearings on the part and screw everything together

Use M4 CHC screws and M4 nuts to screw in the bearings

The screw heads are below the 3D printed part

Put a washer around the screw head and nut.

Étape 4 - Fix the system to the board using 4 wood screws

Using the 4 wood screws on the board

Étape 5 - Screw on a threaded rod for the bottle

Make a countersunk hole in the board (the chamber will be 5mm deep and 20mm in diameter, and the diameter of the hole will be equal to that of the threaded rod).

This hole corresponds to the centre of the arc of the 3D printed part.

The bedroom will be below the board)

Cut the threaded rod to a length of 20cm.

Screw the threaded rod with the M4 nuts onto the board at the centre of the arc of the previously 3D printed part. The threaded rod must not extend beyond the underside of the board.

Insert a nut on the threaded rod and then a washer to hold the pipe in place on the rod.

Cut the pipe to a length 3cm shorter than the top of the threaded rod

Fit the last washer and nut to tighten the PVC pipe.

Étape 6 - Nozzle section (extrusion)

- If necessary, drill holes in the bracket so that the holes are co-axial with the holes in the heating part of the nozzle.

-Fasten the heating part of the nozzle to the bracket using the bolts.

-Drill the nozzle to a diameter of 1.75 mm.

-Screw this nozzle into the heating section

-Screw the bracket to the wood using the wood screws (the nozzle must be in line with the band made by the bottle).

Étape 7 - Arduino wiring

Wiring it all up (see photo)

Arduino Code :

Étape 8 - Filament reception

- Cut the dowels, the PVC tube and the prism to the required length.

- Also cut two polystyrene cylinders 14cm in diameter and extrude a 3x3cm prism down the centre.

- Fix the 8mm diameter stud to the empty coil using two washers and two 8mm nuts.

- Insert the PVC tube around the stud and secure it with another 8mm nut

- Drill a 4mm diameter hole in the prism at a distance of 3cm.

- Fix to the main wooden board using a screw (whatever the reference), then add the pieces of polystyrene, the coil and finally the 4mm diameter stud which is fixed around the prism using two washers and two 4mm nuts.

All you have to do is turn the spool by hand using the handle to collect the filament.

Notes et références

https://arduiblog.com/2023/04/23/recreator-3d/

en fr 1 Draft