Step 1:  ​3D print your outer bowl

Firstly you will need to 3D print your outer bowl using carbon fiber PLA filament.  You can download a version of the file here:
















Step 2:  Laser cut your press mold for the internal bowl

You will need to laser  cut a press mold to make the silver section of the bowl.  You will probably need about 6-8 of these if you are using 3mm acrylic.  You can download a version of the file here:





Glue your laser cuts together using super glue.  Ensure each layer is clean first.  Once you have glued the final layer, place in a vice and leave to set.















Part 3:  Cut and anneal your metal


Cut a square piece of metal that overlaps the edge of your press.  You should then anneal this to a cherry red color.









Quench your metal in cold water and place in the pickle to clean.










Part 4:  Press form your metal

Place your press form tool on the bottom plate of the press.  Place your silver sheet on top, followed by rubber and a steel block.









Press your silver.  This may need to be repeated several times before your bowl becomes deep enough from the annealing stage.













Part 5:  Pierce your metal

Using a piercing saw, cut around the line of the outside of your bowl.  Leave a little excess to file perfectly to the edge of the bowl.













Part 6:  File and sand


Using a large flat file, file the outside edge until you can't see and saw marks.












Starting with 250 grit emery paper, sand the edges and the surfaces of the bowl in a circular motion.  When most of the scratches are removed repeat this with 400 grit.  Repeat this with 600, 800 and 1200 grit until you have a nice finished surface.















I finished off the edge with a burnisher to give a high shine and rubbed the surfaces with some brasso and a polishing cloth.




Info:

To make this bowl you will need acrylic 3mm sheet, silver sheet 1mm and carbon fiber PLA filament.



Info:

To make this bowl you will require copper fill 3D printing filament,  Copper sheet 1mm thick and a sheet of 3mm acrylic.


Why make a copper bowl like this?

3D printing the outside section is a very quick and accurate means of production.  You can create intricate designs in interesting materials that are easily built without the input of handcraft.

The traits of laser cutting lend them selves well to producing accurate press forms.  Without the laser cutter a more traditional means of making a press form would be to hand pierce a thick sheet of acrylic and then file all the saw marks out at a 90 degree angle.  It is much quicker to laser cut multiple sheets of acrylic and glue together and the finish of the edges can be much neater depending on your filing and sanding skills.

Using laser cutting for press-forming tooling removes the object from being entirely CAD made and introduces a more personal touch to the piece.



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Karen-Ann Dicken


how to make your own silver  Arbroath Bowl

Silver Arbroath Bowl