Assignment
read the material safety data sheet (MSDS)
and technical data sheet (TDS) for the resins that you're using design and fabricate a 3D mold (~ft2)and produce a fiber composite part in it
What are composites?
A composite material (also called a composition material or shortened to composite) is a material made from two or more constituent materials with significantly different physical or chemical properties that, when combined, produce a material with characteristics different from the individual components. Thanks Wikipedia.
The material we get to work with is a canvas bag material or a potato bag material and a epoxy resin.
Design the structure
for the design , I briefed because I already started the design in my previous week that is why I plan to continue with because it is too simple.
then I export the file to .stl format in here I want cut 3d object. for making tool path I am using Art cam.
I open the .stl file in artcam.
ONSHAPE LINK HERE..!
How to make 3D Tool path in artcam
Step 1:
For opening the 3d file I used mill wizard, firstly I have open the mill wizard the I browse the designed 3d file then click next
Step 2:
Then the upcoming window we can see the cut direction I choose top direction then I click next
Step 3:
then the new window we can see the dimension check it is same as the design. spatially the z axis then click next
Step 4:
then we can see a cut plane there is two option one is the "center in model" and another one is" bottom of model " I want to mill my design from bottom to top that is why I select "Bottom of model"
Step 5:
In this window, we can see the selection of the tools in here i am using 3mm Roughing tool and 3mm finishing tool that is why i choose both of them 3mm.
Step 6:
In here we want to select the material thickness, I am using 18mm wood for that I select 18mm material. click next
Step 7:
click-→ calculate-→ simulate (we can see the simulated result)
Step 8:
before i choose two type of bits that is why save two of them one is save roughing and save finishing, I Saved both of them .nc format.
Milling Result
preparing for the composites
mold is ready I start my composite preparation for that I am using nylon and jute also I am plan to use 4 layers. For the composite we are using amazing crystal resin.
How to do the composites
Step 1:
first, I covered the mold with insulation tape because after the composite there is a chance to stick with mold .
Step 2:
I have to cut the nylon and jute in my design shape
Step 3:
The mixing ratio of crystal resin A&B is 1:2 ratio respectively.
note: when you are mixing the chemicals you have to wear the glows because maybe a chance to make allergy.
Step 4:
Mix the ratio of A&B resin and hardener very well then I have to paste the resin in the nylon cloth then after I put the cloth above the mold after that I use two layer pasted resin jute and the smooth resin.
The mixing ratio is like 1: 2 and I mixed well to get properly mixed.
Step 5:
I poured the mixture on the thread mesh and cottons placed over it.
I wrapped up the whole thing with the clinse film. After that I made some air holes with nail.
Step 6:
I placed the whole thing inside the vacuum cover and removed the air inside it.
Step 7:
Since the setting time for the composite is 24 hour,On next day I remove the sides and and unwanted portions.
There are some problems in the shape. Because the round shapes are not properly got.
Video