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sgtbob
Fireman
   
Premium Member

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sgtbob
Fireman
   
Premium Member

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sgtbob
Fireman
   
Premium Member

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quartergauger48
Fireman
   
Premium Member

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Posted - 12/22/2020 : 5:32:07 PM
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quote: Originally posted by Terrell
You're moving along quickly, Bob. Looking good!!
But don't worry, I already have your next project laid out for you.

Come on Fred, this is right up your alley'..
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Ted |
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Country: USA
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sgtbob
Fireman
   
Premium Member

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Bernd
Fireman
   

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Posted - 12/24/2020 : 10:14:52 AM
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Going to be interesting to see how those two part mold pieces are going to turn out. I would think some vent holes to let trapped air bubbles out might be in order. Here's wishing you good luck on your casting.
Bernd
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New York, Vermont & Northern Rwy. - Route of the Black Diamonds |
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Country: USA
| Posts: 3895 |
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sgtbob
Fireman
   
Premium Member

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Posted - 12/26/2020 : 10:56:31 AM
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Not too much time to work on the project over the holiday weekend but I did find time to paint the decking gray, add a white topping strip, and do some planning and interpreting the photos again, and again, and again.
Also, I will be needing a zillion of those little balusters I am casting so I took five of my castings and made a new little two piece mold in which to cast them five at a time.
Bernd, thanks for the advice, much appreciated, however so far the casting seems to be going OK. I'll try to post a photo soon.
Bob
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http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=30102 http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=51837 |
Edited by - sgtbob on 12/26/2020 11:00:33 AM |
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Country: USA
| Posts: 4191 |
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TRAINS1941
Engineer
    
Premium Member

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Posted - 12/26/2020 : 12:21:18 PM
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Nice looking molds Bob.
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Jerry
"And in the end, it’s not the years in your life that count. It's the life in your years." A. Lincoln |
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Country: USA
| Posts: 13060 |
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sgtbob
Fireman
   
Premium Member

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Michael Hohn
Fireman
   

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Posted - 12/27/2020 : 08:50:15 AM
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Very nice, Bob.
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Country: USA
| Posts: 7006 |
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Ensign
Fireman
   
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Posted - 12/27/2020 : 09:47:17 AM
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Bob, looks like the Santos casting company is in full production mode, turning out quality castings once again!
Greg Shinnie
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Country: Canada
| Posts: 8939 |
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Bernd
Fireman
   

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Posted - 12/27/2020 : 1:25:22 PM
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Bob,
I'm impressed with how good those castings turned out. A closer look at your mold shows no sprue gates. How'd you do that?
Bernd
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New York, Vermont & Northern Rwy. - Route of the Black Diamonds |
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Country: USA
| Posts: 3895 |
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Ray Dunakin
Fireman
   

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Posted - 12/28/2020 : 01:43:24 AM
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Cool!
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Country: USA
| Posts: 3360 |
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sgtbob
Fireman
   
Premium Member

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Posted - 12/28/2020 : 3:34:11 PM
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Mike, Greg, Bernd, and Ray, thanks for posting.
Bernd, sorry for the delay in getting to your question, I have not been on the Forum much over the holidays. There are no pouring gates, this is called the "squash" method. I have tried to explain it several times but I know it is hard to describe. Here it is:
1. lay the two mold halves, open side up, next to each other.
2. mix up a batch or resin and carefully pour it into both mold halves slightly overfill (it is messy, work on a bunch of newspapers).
3. This resin sets up so fast you can see it start to thicken like heavy syrup.
4. as it thickens you can pick up one mold half, turn it face down and quickly plop it onto the other mold half. Quickly throw the flat board onto the molds and add weight, as much as you can, it will hold the mold halves together.
5. let it fully cure, I leave it about a half hour, then demold the parts.
It's a thing to get used to. If you do it too fast you will loose much of your resin and if you go too slow you will get a thick parting web between parts. You will loose some parts due to air bubbles but it's easier than trying to get the mold to fill through a too small gate. I hope that helps.
Bob
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http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=30102 http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=51837 |
Edited by - sgtbob on 12/28/2020 3:35:43 PM |
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Country: USA
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sgtbob
Fireman
   
Premium Member

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