Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Old March 12th 05, 01:31 AM
peter
 
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Default casting - shaw proses

Can anyone help with more information regarding the use and
preparation of ethyl silica slurry. How long does it take to gel ?

any information would br appropriated, I need to make a number
op bronze dies for use as permanent mold casting of aluminum


thanks john

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Old March 12th 05, 01:51 AM
Mark
 
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Default

You will have to develop the times from experimentation with your mix. It
could range from a few minutes to much longer. It was used at one foundry
where I worked. I don't have much personal experience with it. They are
use the Antioch process and Hydroperm process. All three processes have to
be worked out (blending, amounts of components, mixing time and setting
time). It will also depend on the pattern material you use.

As I understand it, you are making bronze permanent molds to make aluminum
castings? Why not make iron molds? It would be more economical.

Mark

"peter" wrote in message
...
Can anyone help with more information regarding the use and
preparation of ethyl silica slurry. How long does it take to gel ?

any information would br appropriated, I need to make a number
op bronze dies for use as permanent mold casting of aluminum


thanks john



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Old March 12th 05, 12:12 PM
Tim Williams
 
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"Mark" wrote in message
...
As I understand it, you are making bronze permanent molds to make aluminum
castings? Why not make iron molds? It would be more economical.


Well, that depends on what equipment you have. G

I can't quite melt iron yet, though I'm getting closer:
http://webpages.charter.net/dawill/I...ion_Melted.jpg
Was trying to heat the thing inside and the coil got too hot, well I melted
something -- the solder! D'oh... melts pennies tho

Tim

--
"California is the breakfast state: fruits, nuts and flakes."
Website: http://webpages.charter.net/dawill/tmoranwms




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