Patterns for casting plastic or metal.

[GaryR]

 Well, one way I found was to draw it up in cad, export as jpg, convert to negative image with photo editing software, and use a rubber stamp making kit to make the pattern.

http://www.flickr.com/photos/14260201@N05   It's in the train folder if you don't see it right off. Can't seem to link images directly from flickr.

You can get some info and the photo polymer from here.  http://www.art-rubberstamps.com/

I asked 'em and they said it's the discount price of $12.71 for 1 pound ( about 12 oz.) of the photo polymer.

Note: For the loco wheel, 2 layers of the rubber dam( twice as thick), exposure: about 45 min. 6" from 2 each 18" black light  lamps. Gently move it a few times for even exposure.

Questions?

 

GaryR

[Greg Elmassian]

 I think I understand, do you have a picture of the mold you can post here?

 Regards, Greg

[GaryR]

As I tryed to explain, flickr forbids direct posting of images stored on their site.  The approved way is below.  Using the little tree image thingy will not work. I tryed.

  <a href="http://www.flickr.com/photos/14260201@N05/4589386958/" title="06 by JackOfArts, on Flickr"><img src="http://farm5.static.flickr.com/4063/4589386958_41d79b33a5_o.jpg" width="599" height="450" alt="06" /></a>

 Or if you are interested enough, you can copy & paste the url   http://www.flickr.com/photos/14260201@N05/4589386958/

The simple answer to your question Greg is no, I don't.    

For those interested in trying the process, I strongly suggest you copy&paste the other urls I posted as well. It is easy, but I wouldn't go so far as to say simple.

GaryR

 

 

 

 

[Greg Elmassian]

 Sorry Gary, I completely spaced out and missed the link in your post

 http://www.flickr.com/photos/14260201@N05/4589386958/

 I must have hit the link and thought I got an ad.

Regards, Greg

[GaryR]

 No problem Greg. Looked like an advert huh? Thanks......I think. Old habits you know. Oh, the blue thing is the mold.  

If anybody needs more pictures at different stages of the process, let me know.

GaryR

[kstrong]

What metal are you casting with for the drivers?

Later,

K

[GaryR]

 Most likely pot metal/zinc. It's hard for me to get the blast furnace up to brass temps. Molten brass is a little more dangerous to handle too.  With zinc/pot metal you just have to watch out for the fumes. At the moment, it looks like I'll be using the lost wax process.

GaryR