1-WAX blue
1-WAX blue |
2-Insta Mould-
2-Insta Mould |
3. HYDRO-STONE gypsum cement:-
Hydrostone is one of the hardest and strongest gypsum-cement. We are using for casting which produces extremely hard surface.
The important thing, always add powder to the water, never the reverse. (Sprinkle the powder into water slowly and evenly.) Mix with a 1750rpm drill and mixing blade. Pouring should be smooth and steady into the center of the base of the mold.
DRYING- All casts should be dried as quickly as is safely.
We read the instruction on the box which explained how much quantity and time required for the material.
Specification:
1. Product : Hobby plaster – general use (for 100g powder, use 65g water)
2. Product : Molding Plaster (for 100g powder, use 70g water)
2- Design a 3D mold, machine it, and cast parts from it.
Step:01
-Design a 3D Mold
This week I designed a module that can be used a tile and can be clodded over a surface for tactile effects.I decided to make smaller prototype of it using a wax mold and by casting rubber into it.
I started with drawing a basic square and then shifting the intersection of its diagonals in 2D. Later I elevated the intersection point to make it a 3D module. I kept space between each module because I wanted the end result to be as individual tiles.
Below are the images that show the design process of the module.I used CoreDrow to design them.
The image shows the 2D my college logo.
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Next step import in solid work file
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Extruded Cut 6mm
- When your design is ready,then that file you should convert into the .stl file format.
Exporting in '.stl' format:
To export your object(s) to a steroelithography (.stl) file format, select your object(s) and go to File, Export Selected. You can also use the Export command.
In the Save as type option drop down menu, select .stl as the file type.
The files can be accessed
Step:02
Milling the 3D Mold
-Then by selecting "make rml" option you can select 1\8 end mill tool. I use rough cut for the mold. I haven't use finish cut because there is no need of finish cut. It machines well in rough cut. After that convert that stl format into the png image.And further procedure as I mentioned my previous assignment.
Next step is to mill the mold.Below are the images that explain the parameters and steps I used. I did milling in 2 parts:
Roughing using 1/8th inch endmill drill bit and Finishing using 1/8th inch ballnose drill bit.
The above image shows the parameters that I used fto generate the finishing toolpath using a ballnose bit.
Below, images show the process of milling and the end result.:
Milling proseces- |
Final |
The mold(positive) looks like this after milling through modella machine. Then I pour silicon rubber solution inside the mold.
Step:03 |
Preparing silicon Rubber mold |
After zeroing the weight of the plastic cup, I used Vytaflex 40 Urethane Rubber compound to make the rubber negative mold.
I started with adding Part A in the required quantity. |
Next, I zeroed the weight of Part A and added Part B in the exact same quantity. |
I stirred it well to form a uniform mixture.
I pour material inside the mold with taking care of no bubble formation.If bubble formed inside the casting material it would damage the connectivity of material and cavity destroyed the hole finished product.
I started with adding Part A in the required quantity. |
Next, I poured it such that each tile remains unconnected. |
After leaving it for a setting time of 12 hours, the rubber tiles were ready.
Next final mould: |
Good looking and clean mould |
here I mix epoxy and hardener
Next step i used epoxy and hardener put in the mold
After leaving it for a setting time of 5 hours, the rubber tiles were ready.
My final mould |
My College Logo |
I am so happy in my mould design and mold so clean and looking good
1: Group assignment:
Molding Casting-
There we spent almost one whole day learning about aluminum casting.
There we spent almost one whole day learning about aluminum casting.
They did not use any form of digital tools. They bought the sand from waste casting industries in Chakan (Industrial hub). Below you can see the sand used
Keeping a hole for relief and vapor. |
We keep the first pattern a flat surface. |
The output looks like thisFor core, we are using a turtle. Press the turtle in between. |
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POP plaster of paris
Plaster of paris, quick-setting gypsum plaster consisting of a fine white powder (calcium sulfate hemihydrate), which hardens when moistened and allowed to dry. Known since ancient times, plaster of paris is so called because of its preparation from the abundant gypsum found near Paris.
What is POP-
POP plaster of paris
Safety data sheet-
POP plaster of paris DATA SHEET
We are learning about (pop) plaster of paris:-
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Final Hero Shot of POP Casting |