All MetalShaping

Go Back   All MetalShaping > General Metal Shaping Discussion > Basic questions and answers
  Today's Posts Posts for Last 7 Days Posts for Last 14 Days  

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 01-15-2013, 09:45 AM
jpony645 jpony645 is offline
Member
 
Join Date: Sep 2012
Location: Hayden, Alabama
Posts: 42
Default

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.
__________________
Josh Wilson

"If you're not living on the edge then you're just taking up space"
Reply With Quote
  #12  
Old 01-15-2013, 06:45 PM
Richard-S Richard-S is offline
Member MetalShaper of the Month Nov 2013
 
Join Date: Oct 2010
Location: Huatulco, Oaxaca, Mexico
Posts: 191
Default

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.
__________________
Richard

When I die heaven can wait, I want to go to McMaster-Carr.

My sculpture web page http://www.fantaciworks.com
Reply With Quote
  #13  
Old 03-11-2020, 08:25 AM
FernandoF FernandoF is offline
Member
 
Join Date: Mar 2020
Location: Brazil
Posts: 4
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 ?
__________________
Thanks,
Fernando.
Reply With Quote
  #14  
Old 03-11-2020, 10:47 AM
Barts Metalwork Barts Metalwork is offline
Member
 
Join Date: Mar 2020
Location: Netherlands
Posts: 20
Default

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.
__________________
Bart Harkema
Reply With Quote
  #15  
Old 03-11-2020, 11:23 AM
Kerry Pinkerton's Avatar
Kerry Pinkerton Kerry Pinkerton is offline
Administrator
 
Join Date: May 2009
Location: Near Huntsville, Alabama. Just south of the Tennessee line off I65
Posts: 8,326
Default

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.
__________________
Kerry Pinkerton
Reply With Quote
  #16  
Old 03-12-2020, 07:17 AM
Jaroslav Jaroslav is offline
MetalShaper of the Month April 2020, September 2021, November 2022
 
Join Date: Dec 2012
Location: Czech Republic
Posts: 2,611
Default

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.
__________________
Jaroslav
Reply With Quote
  #17  
Old 03-12-2020, 10:31 PM
FernandoF FernandoF is offline
Member
 
Join Date: Mar 2020
Location: Brazil
Posts: 4
Default

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)
__________________
Thanks,
Fernando.
Reply With Quote
  #18  
Old 03-12-2020, 10:34 PM
FernandoF FernandoF is offline
Member
 
Join Date: Mar 2020
Location: Brazil
Posts: 4
Default

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.
__________________
Thanks,
Fernando.
Reply With Quote
  #19  
Old 05-01-2020, 08:05 PM
hlfuzzball hlfuzzball is offline
Member
 
Join Date: May 2009
Location: Plymouth, mi
Posts: 152
Default

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
__________________
Tom
Reply With Quote
  #20  
Old 04-04-2022, 12:50 PM
Jason A Jason A is offline
Member
 
Join Date: Apr 2022
Location: Zürich, Switzerland
Posts: 13
Default

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
__________________
Jason
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

All times are GMT -5. The time now is 12:40 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.