Recently my brother saw a batch of cookies which had been embossed with a special rolling pin, The design was a skull image which was laser-etched into a plain-old rolling pin. This would leave a sheet of dough behind with the skulls embossed, ready to be cut with a plain-old cookie cutter, baked in a plain-old oven and presto! Cookies with little skulls all over them!
A short discussion followed with some of my female family members who were interested in having custom-made cookie rollers themselves, so I decided to take it on as a bit of a love project.
Using Autodesk Inventor as my software of choice, I initially came up with a basic shape for the roller. It would resemble a traditional rolling pin but to make it easy and cheap to manufacture I decided to use a piece of wooden dowel as the 'handle', that way I just needed to print a cylinder with a hole through it to put the dowel in and some embossing on the outer diameter.
I sat back and admired my work - first time I'd tried embossing a cylindrical surface with a continuous pattern. It turned out pretty good! I showed them and they liked it too. Great!
But while the artist in me (note: there isn't one) was happy, the engineer wasn't. I ran this model through my 3D printers 'slicing' software and found that it would take a whopping 13 hours and about a third of a roll of plastic to print it. They would be quite expensive to make, and if the girls wanted a few designs there would be a few rolls of plastic and many days of printing.
So I developed...
Sleeves!
But while the artist in me (note: there isn't one) was happy, the engineer wasn't. I ran this model through my 3D printers 'slicing' software and found that it would take a whopping 13 hours and about a third of a roll of plastic to print it. They would be quite expensive to make, and if the girls wanted a few designs there would be a few rolls of plastic and many days of printing.
So I developed...
Sleeves!
The idea here is that I could print a central hub for them ONCE and then print much thinner 'sleeves' which would slip on over the central hub. The cost for a single design would be a little more than the solid roller, but once they had a second design in mind the cost came down significantly. Each sleeve would only use about one tenth of a roll of plastic. Great!
Add some handles for the ends of the dowel and we had a finished product! Here are the first two designs they requested, love hearts and paw prints.
Add some handles for the ends of the dowel and we had a finished product! Here are the first two designs they requested, love hearts and paw prints.