12. Molding and Casting¶
For this week I used mahcinable wax to create a sillicon mold that I would later cast. Here is my group work.
Zelda Rupee¶
Fusion 360¶
To start I saved an image of a Rupee and opened it as a canvas and then I traced it:
I then extruded the center piece to 6mm then used loft to create an almost angled extrude:
I then created a box around the Rupee that was the same size as as the piece of wax I was using and then shelled it so that the Rupee was visible:
I then created a cyclindar and a hole for it that would allow the mold to fit together as well as a funnel for the cast material to flow through:
Rupee ToolPath¶
For this toolpath I used only Ball Nose bit and I used the Pocket Clearning toolpath:
Milling¶
Wax in the Bantam:
Wax milled in the Bantam:
Wax milled and cleaned:
Casting the Wax Mold¶
To create my mold I used a 1:1 ratio of we used Mold Star 16, more info about Mold Star. To know how much Mold Star I would need I poured water into into the wax and found that it was around 30ml so I had to used 15ml of part A and B. I then mixed the two parts together and then poured into the wax. Heres what the first pour looked like:
This is what the mold looked like after I took it out of the wax:
The way I designed my file I add to pour again in the one piece of wax I milled and using the same steps above I re-casted the wax. You can see that here:
I made a mistake with how much Mold Star I used the second time because I decided to pour with Griffin and we didnt make enough so my mill didn’t get filled up enough. This wasn’t a problem for now but later it would be because the mold didn’t keep its for as well as it should’ve.
Casting the Silicon Mold¶
Using rubber bands I held the two Sillicon Molds together and I poured with Smooth Cast 65D, more info about Smooth Cast. Sillicon Molds together:
I again poured with Griffin and we also poured our group mold here. With the Pot Life of Smooth Cast being 2.5 minutes we had to go quickly. I also wanted to use some green piments because the Zelda Rupee is most communly green, the problem was with having the short pot life I didn’t have a long time to mix so the green pigment was stuck at the bottom of the cup.
This is what the Color Error looked like:
Once the cast was done this is what the Rupee looked like right after the mold:
The part at the top was the path I used to pour the mold. I then spent a while sanding down the top part with a file until it looked like this:
Roughing and Finishing Pass¶
To demonstrate the use of both a Roughing and a Finishing Pass I created a simple star mold similar to the one I used for group work. For the Roughing toolpath I used an Adaptive Clearing toolpath and for the Finishing toolpath I used a Flat toolpath. For designing the file I did the excact same steps as the Rupee:
This is what the Roughing pass looks like:
and this is what the Finishing pass looks like:
