This morning I amended my laser cutting bowl file from my failed attempt yesterday. I moved out the slats and ran a few tests to make sure the sections slotted in tightly.
I decided not to use any glue when slotting in the sections as yesterday it had reacted with the plastic and left a messy white stain.
It took a little tweaking to get all the parts to go in to the top and bottom sections, but the final piece holds together well.
I laser cut some rings the same size as the top of the bowl and glued them together using super glue to make a press mold.
I cut a piece of copper just larger than the press mold and annealed it.
I then placed the copper on the press mold with rubber above and pressed the copper.
I didn’t want the copper to snap at the rim so I took it up to two bar and then re-annealed it.
I pressed again taking the pressure up to three bars.
I then pierced out the edge of the copper bowl and filed it.
I used 280 grit wet and dry paper to put a mat finish on the copper using a circular motion.
Instead of polishing to a high finish which would oxidise quickly anyway I decided to use platinol to blacken the copper.
I am pretty happy with the finished piece although I am not happy with some of the platinol and may re-apply this tomorrow.
This week I have started to design my cutlery in CAD. I have been thinking about this for a long while and trying to decide weather to hand forge them with my 3D printed hammer or press them. As I have time restraints on the build I decided that pressing them would cut down time in production of a large quantity.
I have played around with shapes and forms and decided to go for something simple but with a twist in the form. The CAD models have taken about 3-4 days of trying to come up with the best forms. I’m the end I used a combination of t-splines and surface modelling. Although the surface modelling took a lot longer I got better results.
I should get the press mold back next week to try the spoon as a test. Then I can make any tweeks I need to make to the design of the mould fore the rest or the range.