Science and Technology news... :: View topic - What materials will quickly and completely dissolve in a str

Guest

I am attempting to fabricate an item in a manner similar to the lost
wax casting technique.

In lost wax casting, a mold is formed around wax, and the wax is
melted away by heat to fcreate the casting void.

I would like to do something similar using a material that will hold
its shape until it is dissolved away.

I would like to dissolve it in KOH or NaOh but if necessary, I can
also use a moderate acid solution.

Recommendations please.

dlzc · Guest

Dear boynton...:

On Oct 2, 7:16 am, boynton...@gmail.com wrote:
[quote]I am attempting to fabricate an item in a manner
similar to the lost wax casting technique.

In lost wax casting, a mold is formed around
wax, and the wax is melted away by heat to
create the casting void.

I would like to do something similar using a
material that will hold its shape until it is
dissolved away.

I would like to dissolve it in KOH or NaOh but
if necessary, I can also use a moderate acid
solution.

Recommendations please.
[/quote]
Can you say a bit about why you do not want the lost wax process? Is
it contamination by hydrocarbons, the heating or what?

Some alternatives / background:
http://www.cnczone.com/forums/archive/index.php/t-11935.html
http://en.wikipedia.org/wiki/Sand_casting
http://en.wikipedia.org/wiki/Die_casting
http://en.wikipedia.org/wiki/Lost_foam

David A. Smith

Madalch · Guest

On Oct 2, 7:16 am, boynton...@gmail.com wrote:
[quote]I am attempting to fabricate an item in a manner similar to the lost
wax casting technique.

In lost wax casting, a mold is formed around wax, and the wax is
melted away by heat to fcreate the casting void.

I would like to do something similar using a material that will hold
its shape until it is dissolved away.

I would like to dissolve it in KOH or NaOh but if necessary, I can
also use a moderate acid solution.
[/quote]
Aluminum will dissolve quite well in concentrated hydroxide solution.

Bill Penrose · Guest

On Oct 2, 7:16 am, boynton...@gmail.com wrote:
[quote]I am attempting to fabricate an item in a manner similar to the lost
wax casting technique.

In lost wax casting, a mold is formed around wax, and the wax is
melted away by heat to fcreate the casting void.

I would like to do something similar using a material that will hold
its shape until it is dissolved away.

I would like to dissolve it in KOH or NaOh but if necessary, I can
also use a moderate acid solution.
[/quote]
Delrin, but it>s expensive and will produce a lot of formaldehyde.
Aluminum, but it will generate heat, steam, and hydrogen.
Protein: You might try sand or some inert material held together with
a protein binder than will dissolve in alkali, like egg white.

Dangerous Bill

Guest

On Oct 2, 3:05 pm, Bill Penrose <dangerousb...@gmail.com> wrote:
[quote]On Oct 2, 7:16 am, boynton...@gmail.com wrote:

I am attempting to fabricate an item in a manner similar to the lost
wax casting technique.

In lost wax casting, a mold is formed around wax, and the wax is
melted away by heat to fcreate the casting void.

I would like to do something similar using a material that will hold
its shape until it is dissolved away.

I would like to dissolve it in KOH or NaOh but if necessary, I can
also use a moderate acid solution.

Delrin, but it>s expensive and will produce a lot of formaldehyde.
Aluminum, but it will generate heat, steam, and hydrogen.
Protein: You might try sand or some inert material held together with
a protein binder than will dissolve in alkali, like egg white.

Dangerous Bill
[/quote]
Thanks,

That is very innovative.

What other proteins could be considered in addition to egg whites that
could be shaped into linguine shaped strips 0.025" thick x 0.060"
wide?

If only Linguine was a protein, it would be perfect.

Thanks again

Rob · Guest

<boyntonstu@gmail.com> wrote in message
news:5d9ade81-7419-431e-8142-029f4f262a9a@k37g2000hsf.googlegroups.com...
On Oct 2, 3:05 pm, Bill Penrose <dangerousb...@gmail.com> wrote:
[quote]On Oct 2, 7:16 am, boynton...@gmail.com wrote:

I am attempting to fabricate an item in a manner similar to the lost
wax casting technique.

In lost wax casting, a mold is formed around wax, and the wax is
melted away by heat to fcreate the casting void.

I would like to do something similar using a material that will hold
its shape until it is dissolved away.

I would like to dissolve it in KOH or NaOh but if necessary, I can
also use a moderate acid solution.

Delrin, but it>s expensive and will produce a lot of formaldehyde.
Aluminum, but it will generate heat, steam, and hydrogen.
Protein: You might try sand or some inert material held together with
a protein binder than will dissolve in alkali, like egg white.

Dangerous Bill
[/quote]
Thanks,

That is very innovative.

What other proteins could be considered in addition to egg whites that
could be shaped into linguine shaped strips 0.025" thick x 0.060"
wide?

If only Linguine was a protein, it would be perfect.

Thanks again

Sugar dissolves. How thin can a sheet of toffee be cast?

Bill Penrose · Guest

On Oct 2, 4:15 pm, boynton...@gmail.com wrote:
[quote]What other proteins could be considered in addition to egg whites that
could be shaped into linguine shaped strips 0.025" thick x 0.060"
wide?
[/quote]

Methinks you might find the answer in food science. Those guys are
geniuses in making odd things out of foodlike starting materials.

DB

Bill Penrose · Guest

On Oct 2, 4:15 pm, boynton...@gmail.com wrote:
[quote]On Oct 2, 3:05 pm, Bill Penrose <dangerousb...@gmail.com> wrote:

On Oct 2, 7:16 am, boynton...@gmail.com wrote:

I am attempting to fabricate an item in a manner similar to the lost
wax casting technique.

In lost wax casting, a mold is formed around wax, and the wax is
melted away by heat to fcreate the casting void.

I would like to do something similar using a material that will hold
its shape until it is dissolved away.

I would like to dissolve it in KOH or NaOh but if necessary, I can
also use a moderate acid solution.

Delrin, but it>s expensive and will produce a lot of formaldehyde.
Aluminum, but it will generate heat, steam, and hydrogen.
Protein: You might try sand or some inert material held together with
a protein binder than will dissolve in alkali, like egg white.

Dangerous Bill

Thanks,

That is very innovative.

What other proteins could be considered in addition to egg whites that
could be shaped into linguine shaped strips 0.025" thick x 0.060"
wide?

If only Linguine was a protein, it would be perfect.

Thanks again
[/quote]
BTW, why don>t you try linguine? There>s enough protein in it, it
might lose its integrity in alkali. Starches, as a rule, are fairly
stable in alkali, tho.

DB

Mark Thorson · Guest

Bill Penrose wrote:
[quote]
On Oct 2, 4:15 pm, boynton...@gmail.com wrote:
What other proteins could be considered in addition to egg whites that
could be shaped into linguine shaped strips 0.025" thick x 0.060"
wide?

Methinks you might find the answer in food science. Those guys are
geniuses in making odd things out of foodlike starting materials.
[/quote]
Sugar can be manipulated into arbitrary shapes,
and easily dissolves in water.

http://thecandyartist.com/

http://www.celestialevents.net/Pages/shan.html

I believe he is actually working with a mixture of
sugar and citric acid. I think the latter is to
improve its workability.

http://en.wikipedia.org/wiki/Sugar_sculpture


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