Thermal expainsion calculation for 2pc casting mold
Thermal expainsion calculation for 2pc casting mold
(OP)
Hello all,
This is my very first post here! glad to have found this place. I'm hoping you guys can help me with something, I'm trying to design a mold made from 253MA stainless steel for casting pure silver, but I want to make this a 2 piece mold with a top and calculate thermal expansion of the stainless as well as the pure silver so that when the silver melts and expands it will touch the top of the mold and cast with a flat top surface, once it cools it will have shrunk way down and have a nice flat top with which I could more easily stamp it. I just need the special calculations to know how much height do I need to achieve this magic moment during the casting inside a kiln, below will be all the information, please help me understand how to calculate this on my own as I'm just a lay person.
The mold cavity as follows: length 1.375" -1°/S x width .625" -1º/S x height .227" R.125" all 4 corners (this is my best guess adding for thermal expansion, but this is probably wrong, please double check the height) (-1°/S means the taper in the cavity) (R.125" stands for 4 rounded corners as 1/8th inch)
http://files.engineering.com/download.aspx?folder=...
http://files.engineering.com/download.aspx?folder=...
Actual cubic volume of pure silver material is -->[.18"]<-- inch³ or 31.103 to 32 grams
Silver linear thermal expansion is: 10-6 in/(in ºF) -->[11]<-- (is that micron?)
Mold material 253MA Stainless Steel: Coeffiient of Thermal Expansion,(in/in°F x 10-6) -->[10.5 at 1600ºF] [10.8 at 1800°F]<-- (again, does that formula stand for micron?)
http://files.engineering.com/download.aspx?folder=...
kiln temp will be -->[1761-1763°F]<--
This is my very first post here! glad to have found this place. I'm hoping you guys can help me with something, I'm trying to design a mold made from 253MA stainless steel for casting pure silver, but I want to make this a 2 piece mold with a top and calculate thermal expansion of the stainless as well as the pure silver so that when the silver melts and expands it will touch the top of the mold and cast with a flat top surface, once it cools it will have shrunk way down and have a nice flat top with which I could more easily stamp it. I just need the special calculations to know how much height do I need to achieve this magic moment during the casting inside a kiln, below will be all the information, please help me understand how to calculate this on my own as I'm just a lay person.
The mold cavity as follows: length 1.375" -1°/S x width .625" -1º/S x height .227" R.125" all 4 corners (this is my best guess adding for thermal expansion, but this is probably wrong, please double check the height) (-1°/S means the taper in the cavity) (R.125" stands for 4 rounded corners as 1/8th inch)
http://files.engineering.com/download.aspx?folder=...
http://files.engineering.com/download.aspx?folder=...
Actual cubic volume of pure silver material is -->[.18"]<-- inch³ or 31.103 to 32 grams
Silver linear thermal expansion is: 10-6 in/(in ºF) -->[11]<-- (is that micron?)
Mold material 253MA Stainless Steel: Coeffiient of Thermal Expansion,(in/in°F x 10-6) -->[10.5 at 1600ºF] [10.8 at 1800°F]<-- (again, does that formula stand for micron?)
http://files.engineering.com/download.aspx?folder=...
kiln temp will be -->[1761-1763°F]<--





RE: Thermal expainsion calculation for 2pc casting mold
RE: Thermal expainsion calculation for 2pc casting mold
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Thermal expainsion calculation for 2pc casting mold
"Even,if you are a minority of one, truth is the truth."
Mahatma Gandhi.
RE: Thermal expainsion calculation for 2pc casting mold
===>TIP Casting machine<==
RE: Thermal expainsion calculation for 2pc casting mold
RE: Thermal expainsion calculation for 2pc casting mold
Why not just cast you part "upside down" so that gravity is your friend rather than your enemy.
RE: Thermal expainsion calculation for 2pc casting mold
RE: Thermal expainsion calculation for 2pc casting mold
RE: Thermal expainsion calculation for 2pc casting mold
RE: Thermal expainsion calculation for 2pc casting mold
RE: Thermal expainsion calculation for 2pc casting mold
If you make the mold, just change the amount of silver until it fills it. Since the mold will not be exactly the volume you calculated, so you will have to experiment to get the right amount anyway.