First Molds Made! Parts Update - 3/8/2014

Hi!


Delphine, Sebastian and I met today to discuss changes to our design, and


We were worried about the hands of our clock for a while, with two major concerns:

1. That, given enough clearance, a hand could snag on another.
2. That the hands would sag and be overlapping at all times.

After some back-of-the-envelope calculations, the first concern turned out to be dismissible as unlikely. The second concern was solved by deciding to change the hand design to be one piece of 1/8" acrylic that included both hands, instead of two 1/16" pieces that were two individual hands.


We also designed and wrote the tool paths/Gcode for both the cavity and core molds.



Here's an image of the cavity mold:

Here's the core mold

A cross-sectional view of the two of them together:

We ended up having to change the ring's design due to complications with the mold. A fillet was added in one location, and removed in another.

 

A sketch of the ring's cross-section, denoting the changes:

The ring itself is black, which makes it difficult to see the dimensions on it.



Glad to see some results after a long day of work!