Pema Yangzom

3D Designing in Fusion 360

So for this week I have decided to go for something simplier since we still have so much of machine work to finish.I am going to make my sons name in our native language Dzongkha.

Steps for Designing
1. Consider the dimensions of your mold wax. The mold wax I got was 150mm by 70mm
2. Consider the outer wall thickness, I have given mine a 5mm
3. Consider the gap thickness between the outer wall and your design. I kept mine 10mm
4. On the remaining surface I applied fillet of 1mm
5. Then I typed usinfg Tibetan Language keypad and extruded it by 5mm.
6. And then export in the .STL formt

Working in Modela Player

Roughing
1. Import the .stl file in your modela player.
2. Click on the outer surface and then set it to manual and set the cutting depth to 10mm from everyside.
3. Click on the new process and choose the Roughing,Keep the cutting surface tab on default.


4. Set your tool to 3.175 Suaqre

5. Set the cutting area and depth to partial and start height to 5mm

6. In the choose the type of tool path to create, choose the Contour Lines.

7. Set the cutting parameters to default.

8. Name the process name and click on finish.Now good to go.

Finishing
1. create a new process and select the finishing.

2. Set the cutting surfce to default

3. Select the tool to R1.5825 Ball

4. Set the cutting depth to partial and set the start height to 5mm

5. Choose the type of tool path to create to Scan Lines

6. Set tge cutting parameters to default

7. And give your process name and its done.

Molding in SRM-20

Roughing
1. Find the mid point for your wax mold. I tried to find the midpoint of the wax mold by finding midpoints from all the sides. But upon reading some of the instructors the trick is to make a diagonal line on the mold and its easier to find the mid point.
2. With the help of double sided tape,stick the mold wax on the PCB milling bed and set the bed properly.
3. change the endmill to square one and set zeroying and set xy origin
4. From SRM-20, click on cut and add the file and click on Output.

Finishing
1. Change the endmill to the ball endmill
2. set the z origin
3. click on cut and add the finishing file and click on output.

Molding (Making mold with silicone

Materials required
1. Silicon Part A and Part B
2. wooden spatula
3. clean glass
4. weighing machine

Steps followed
1. Take one each of the Part A and Part B silicon in the small cup and mix it well in a bigger cup





2. Then pour the mixture in the wax mold. Inorder to avoid bubbles, pour it slowly and thin.



3. sit it on the table and tab on the table giving vibration to remove the bubble and let it set.

Casting

Steps followed
1. keep a clean glass on weighing machine (set it to zero to reduce the glass weight) and add hydrostone. I used 51.2g and for water I used 15.1g



2. Put the water in the hydrostone and mix well.

3. Pour the mixture in the silicon mold. Make sure to pour it from a height and thin to avoid bubble
4. After that set it on a table and tap on table to remove the bubbles and let it dry.

Hero Shot

I wanted to see how casting would turn out if I dont measure the hydrostone and water. There was definetly some bubles in it.

Files

Design File