Interventions 3D printing
Making my own paste for 3D printing
Eggshell Paste
1
PREPARE THE EGGSHELL POWDER
1. Wash the eggshells and boil them for 5 minutes.
2. In order to remove all remaining waste, put them in a colander and wash.
3. Dry the eggshells - put in an oven tray and heat for 15 minutes at low temperature (100ºC).
4.Grind the eggshells into a powder.
5. Sieve the ground eggshells to obtain a fine powder.
2
PREPARE THE BINDER: Xanthan gum
The water : xanthan ratio is 1:0.04 (100g to 4g)>>
1. Measure the desired amount of xanthan powder.
2. Measure the desired amount of water. (Distilled water is recommended)
3. Add xanthan powder to the water and stir until it starts to thicken. To completely dissolve the lumps that are formed at the beginning, use a mixer or wait longer.
3
PREPARE THE PASTE.
The powder : binder ratio is 1:0.4 (100g to 40g)
1. Measure the amount of eggshell powder you want to use.
2. Add binder to the powder until the right ratio is met.
3. Stir until both ingredients are well mixed into a smooth paste.
4
3D PRINTING with extruder
1. Fill the extruder container with the paste. It’s important to avoid air bubbles when you put the mixture into the container.
2. Printing specifications: - Layer height: 2mm - Speed: 25 mm/second - Pressure: 0.08 bar
3. Store the object at room temperature until it’s completely dry.
Composition
Eggshells
Xanthan
Water
120 gr
4 gr
100ml
Mica Bioprint
Composition
Mica powder 4 gr
Water glass with 37% sodium silicate solution
1.
Mix the mica powder and water glass by hand for a few minutes, until the consistency is smooth. For better results, mix with a high-speed, non-aerating mixer. (e.g. centrifugal mixer, not a blender.)
3.
Prints will be slightly soft until they dry fully. Allow 24 hrs or more to dry fully.
After printing, dry parts on a metal screen mesh or other surface that allows all surfaces of the print to dry equally without pushing the part unevenly. Otherwise warpage and cracking may result.
2.
Load into the printer and print before the paste dries out and hardens. (This will allow several hours of time.)
The material dissolves completely in water. This means parts can be glued together with water, or can be destroyed.
Mussel shell paste
Composition
Sodium alginate
Water
Mussel shell powder
0.3 gr
3.6 gr
6.1 gr
Preparation step to obtain mussel shell powder:
1. Wash the mussel shells and remove remaining waste.
2. Cook the shells for 15 minutes.
3. Heat the shells for 1 hour at 200 degrees in the oven. This will make the shells more brittle.
4. Grind the shells into a powder.
5. Sieve the grinded shells to obtain a powder with particle size of 75 micron (note: 125 micron should also work).
Paste preparation:
1. Measure 0.3 gram of Sodium-Alginate (3wt-% of paste)
2. Measure 3.6 gram of water (36wt-% of paste).
3. Add water to the alginate and stir until a gel has formed.
4. Measure 6.1 gram of mussel shell powder (61wt-% of paste)
5. Add powder to the binder
6. Stir until the ingredients are well mixed into a smooth and homogeneous paste
3D printing:
1. Fill syringe with paste
2. 3D print desired shape with paste
3. Dry object at room temperature until completely dried out
Test 3Dprints
with selfmade clay
Printing with selfmade clay
For the intervention of making my own paste for 3D printing I first tried to print with my selfmade clay (just from flour, water and salt) to see what it is like to print with an extruder.
For the extruder I used a caulking pistol that works with air pressure.
Interventions
Weaving with CNC
I've made a bed with foam and pins to weave on/through
Then I've made a loop with the lasercutter to attach to the CNC, so that the rope would run smoothly.
Simple drawings for weaving pattern
ideas
What I've done now is still easily done by hand. So maybe I can make adjustments and upgrades to make a technique that's not easily done by hand, or is faster or more precise done by the CNC machine.
Speeding up the weaving proces
Make a stable bed from wood
Design an interesting bed milled out a material by the CNC (bed to weave around)
Coming up with ideas to combine the 3D paste making with the CNC weaving
- 3D print the pins for the weaving bed
Combining product processes
CNC weaving + 3D [paste] printing
I couldn’t decide between the cnc weaving and 3D paste making so I decided to maybe combine those two. I first want to improve the bed for the cnc weaving and i was thinking about 3d print the pins for the weaving bed therefor using selfmade 3d paste or clay and make the bed and pins part of the design, instead of only the weaving.