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  #11  
Old 01-15-2013, 09:45 AM
jpony645 jpony645 is offline
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Look closely at the 3 washers on the nose of the snake. You can see the tack welds. It looks as though they are all welded in the same spot so that the next row of washers cover the welds. The ones on the nose would have been the last row.
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  #12  
Old 01-15-2013, 06:45 PM
Richard-S Richard-S is offline
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Quote:
I get these take molds and you just form the metal around the surface. But my real questions are how do you either 1) get the mold out from the inside once it done or 2) Make two halves from the mold and just seam them together, which then, how do you seam something so intricate as the one made from the nuts?
The mold is not inside; it is outside. He is placing the nuts, or washers, on the inside of the various mold sections he has made, then welding them from the inside of the figure, then welding the sections together.
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  #13  
Old 03-11-2020, 08:25 AM
FernandoF FernandoF is offline
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Default molds that supoort welding heat

Hey guys,

This topic is exactly what I was looking for.
Couldn't find anything on the Internet.

Anyone have made any real life testing welding over a mold ?
I mean, does plaster holds to the welding heat ?
Should I make molds of cement for this ?
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  #14  
Old 03-11-2020, 10:47 AM
Barts Metalwork Barts Metalwork is offline
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I have no 'hands on' for welding on plaster but do some Metalart work. I would just give it a try. It depends a lot on the steel, welding type, heat imput, ect. And it also depends on work you want to do. Is the plaster only for the mold and will it be used one time? Or is it be used multiple times or does it stay inside the steel structure.


I mean, you can put plaster in a oven and bake it to high temp right? To fast temperature changes will cause cracks but for a one time mold thats not a problem.



BTW, sometimes I use wood for a mold for welding or plasma cutting (that I use only one time) and put aluminum tape on it not to burn it. You can also try that.
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  #15  
Old 03-11-2020, 11:23 AM
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Kerry Pinkerton Kerry Pinkerton is offline
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Couple thoughts since my original post in this thread several years ago...

On Monique http://allmetalshaping.com/showthrea...hlight=Monique

H 054.jpg

I made flexible shape patterns off the mannequin after I modified her shape to make a more mature model, shaped to fit, trimmed adjacent pieces to fit in proper arrangement on the mannequin, tacked with tig, confirmed arrangement, then welded. I did not tack on the mannequin but could have.

Lots of photos of the process are in the above thread...especially on page 7. She currently has both arms but still no hands or legs below the knees.

The company that made the mannequin pulls real silicone molds off humans. The model was apparently about 18 so I aged her with bondo as appropriate.
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  #16  
Old 03-12-2020, 07:17 AM
Jaroslav Jaroslav is offline
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Gentlemen, you have the courage to show original inspiration for artwork for produce your creations.

Or they have traces of hands and welding ???

Perhaps it would be fun to level the round pads on the girl's body. I'll have to try. I do not know whether I will be praised at home for my skill.
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  #17  
Old 03-12-2020, 10:31 PM
FernandoF FernandoF is offline
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Quote:
Originally Posted by Kerry Pinkerton View Post
Couple thoughts since my original post in this thread several years ago...

On Monique http://allmetalshaping.com/showthrea...hlight=Monique
Wow, amazing work, Kerry.

I was thinking about tacking scrap metal with a lot of welding, so I am worried about mold heat resistance. I will TIG it.

Take for instance a heart made of besants. I want to weld from inside, so would take a negative mold.

I'll try something and post here (not really sure when, though)
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  #18  
Old 03-12-2020, 10:34 PM
FernandoF FernandoF is offline
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Quote:
Originally Posted by Barts Metalwork View Post

I mean, you can put plaster in a oven and bake it to high temp right? To fast temperature changes will cause cracks but for a one time mold thats not a problem.

BTW, sometimes I use wood for a mold for welding or plasma cutting (that I use only one time) and put aluminum tape on it not to burn it. You can also try that.
Thanks, Barts.
The aluminum foil (or tape) is something I'll try for sure if mold is not heat resistant.
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  #19  
Old 05-01-2020, 08:05 PM
hlfuzzball hlfuzzball is offline
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Here is a cool video by artist Stephen Fitz-Gerald explaining his technique on how to weld up a torso metal sculpture using steel lazer cutting drops:

https://youtu.be/pRP5MiQXBSM
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  #20  
Old 04-04-2022, 12:50 PM
Jason A Jason A is offline
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I have a small answer to this issue.

My solution was to first make a form, and then use that to weld against.

Previously I was able to acquire huge stumps of wood, like 1.5 meter tall and at least as big around, and I would use a chain saw to make faces, sort of Easter Island style . Obviously it was fairly rough, but I wasn’t looking for high resolution. I found a supply of 2“ by 1/4“ washers and basically pounded them to shape over the wooden head and Mig welded them together. Sometimes I would get them painted at a friend‘s auto painting shop. Clear coat.

Here in Swiss I don’t have Access to those same pieces of wood, nor to the easy metal.

I kept the form idea but instead I bought several large pieces of like, 4“ thick rigid foam insulation. I boxed them together into a big cube and carved a face out of the foam instead. But of course one cannot weld on the foam (too well, at least I can’t) so instead I covered the finished foam first in several layers of tin foil, then a thick layer of automotive fiberglass and resin.

I could then pull off the fiberglass, and that became a face form in negative. I could then weld on the inside of the fiberglass.. the tin foil and glass kept the burning to a bare minimum. And the welds were then on the back.

For metal pieces I went to the local Home Depot equivalent here and bought 3-500 stainless steel washers, usually about 1.5 mm thick. Or I would get a whole ton of stainless #10 nuts.

When I can find a host, I’ll post some pics. Anyway long story short, (too late) that was my solution.

I came here looking for a way to make body forms. Faces are easy compared to torsos.

Lg, Jason
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