Commit cc628d3e authored by anithghalley's avatar anithghalley
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molding and casting work

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......@@ -8,6 +8,14 @@ This week was all about molding and casting. I learned alot with the process. In
Group assignment can be found [here](https://fabacademy.org/2022/labs/bhutan/students/sangay-penjor/assign/week_9_group.html)
- While molding and casting work, it is very important to take up precautions while doing the process.
- Cover your mouth.
- Avoid eye contact with the chemical.
- Use gloves.
- keep it away from children.
- And also, never throw the left over mixture in the basin since it can block the outlet.
## SOftware used.
- Modela Player.
......@@ -81,7 +89,7 @@ The image above shows the orientation in the g-code and the image below show the
The next step is to generate the .prn file by creating the two processes i.e finishing and roughing file from the modela player.
### Creating the Roughing file.
### **Creating the Roughing file.**
![](../images/molding_and_casting/2_molding_form.png)
......@@ -103,7 +111,7 @@ The tool path for the roughing process will be contour lines (Upcut).
### C**reating the finishing file.**
### **Creating the finishing file.**
Now the next step is the creat g-code for the finishing file. Not much of a difference, we have to change the tool to R1.5825 Ball.
......@@ -134,9 +142,13 @@ The process is very similar to the PCB production. While adjusting origin, I too
1. Set the origin for X and Y coordinate to the center of the wax surface.
2. And set the origin for Z coordinate on the surface of the wax block.
The image below shows the point where I took the reference to set the origin. To match the reference origin in the toolpath for roughing and finishing file.
![](../images/molding_and_casting/ready_to_engrave.png)
### Roughing.
So to start with. add the roughing file as output on Vpanel.
To carry out the roughing process we will be using the 3.175 square endmill. So to start with, add the roughing file as output on Vpanel.
![](../images/molding_and_casting/videos/milling.gif)
......@@ -151,19 +163,34 @@ The roughing work will create a contour lines, so that the finishing file will s
Now we will change the endmill to 1.5825 Ball endmill, maintain the Z origin from the edge of the wax and add the finishing file as output.
With simalar work approach to milling the pcb all the works were completed and the final out is shown below.
![](../images/molding_and_casting/after_engraving.png)
**Problem** : after the finishing work was done, I notices that some of the engraving parts were smaller than the size of the endmill and hence it was not able to engrave well.
![](../images/molding_and_casting/problem.png)
Therefore to solved this, I improvised the mold with the help of a blade to manually engrave.
![](../images/molding_and_casting/blade.png)
After that the mold would like this.
![](../images/molding_and_casting/solved.png)
## Creating a Negative mold
For creat a silicon negative the material as shown below is mixed to with equal quantity.
For creat a silicon negative the material as shown below is mixed with equal quantity of both the material.
![](../images/molding_and_casting/silicon_material.png)
The amount or the weight of the two material must be of equal quantity
![](../images/molding_and_casting/two_material.png)
The amount or the weight of the two material must be of equal quantity and mixed well.
![](../images/molding_and_casting/silicon_mix.png)
The video below shows a glips of work during this process.
......@@ -171,20 +198,36 @@ The video below shows a glips of work during this process.
<source src="../../images/molding_and_casting/videos/mold_fill.mp4" type="video/mp4">
</video>
The vidoe over here is in fast motion but to pour the silicon, we need to pour it slowly over a height to avoid air bubble in the silicon mold later.
The mold was left overnight, so that the material will set well. The next day I seperated the two mold.
![](../images/molding_and_casting/seperated.png)
## Casting.
So the final process is to add the casting material to the negative mold to get the final model of the design.
![](../images/molding_and_casting/casting.png)
The ratio between water and Hydrostone is for 100 gram of hydrostone it will be mixed with 30 gram of water.
The ratio between water and Hydrostone is for 100 gram of hydrostone it will be mixed with 30 gram of water. So we the same measurement of hydrostone and water I made the casting material.
## Final output.
<video width="600" controls>
<source src="../../images/molding_and_casting/videos/casting_fill.mp4" type="video/mp4">
</video>
The final output of the work is shown below.
The casting was kept to dry up and take the shape of the mold. So quite excited to see the final output.
## Final output.
![](../images/molding_and_casting/final.png)
The video below is a short Vlog for the molding and casting week.
<iframe width="560" height="315" src="https://www.youtube.com/embed/rIZnOFwLSTE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
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<iframe width="560" height="315" src="https://www.youtube.com/embed/rIZnOFwLSTE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
## Files
- [Model STL](../files/molding_and_casting/mold%20v4.stl)
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