Customs: Two piece mold help needed

Discussion in 'Creative General Discussion' started by Fishdirt, Oct 6, 2010.

  1. Fishdirt

    Fishdirt Tin Toy Transformer

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    Ok so I've been trying to make two piece molds and it's not working.

    Doing standard methods. Currently just using Oomo and the 200 release spray. The silicone still sticks to each other. No where to separate and no give. I've had to cut/tear the mold open to make it a two piece.

    My current thoughts aren't a solution just an easier way to open it. I plan on using paper or plastic pieces around the edge to separate the outside of the mold pieces.

    Any help would be appreciated. I'm trying to scratchbuild and mod but this is a big bump in that road.
     
  2. TGping

    TGping Well-Known Member

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    Huh, maybe a different mold release... maybe one that you paint on? Otherwise I'm not sure what the problem is. I'm very interested to see what others think.
     
  3. Anti-Venom

    Anti-Venom Well-Known Member

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    Try a thin lair of vasaline?
     
  4. Fishdirt

    Fishdirt Tin Toy Transformer

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    I'm afraid that would kill the details and probably mess with the second silicone pour. Right now the practice is on an articulate hand.
     
  5. Venksta

    Venksta Render Project Creations TFW2005 Supporter

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    Got any photos of your molds? Is the mold seeping into the sides of your mold wall? I get that issue when making my molds under pressure. I just spray the sides of the cured mold as well as the top. Once I pop it out, after its cured, I can tear it apart easily.
     
  6. Fishdirt

    Fishdirt Tin Toy Transformer

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    No, never have that issue and you can actually prevent that by making a trench around the part area (or at least minimize it).

    The problem isn't with casting it's with the mold making. When I do the pour for the second half, after curing, it just fuses with the 1st half. I've used a little mold release (the 200 silicone stuff) and I've used a lot but still nada.

    I can take pictures after I try again later today.
     
  7. Bigbot3030

    Bigbot3030 Well-Known Member

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    What kind of silicone are you using for your molds?

    Randy!
     
  8. Fishdirt

    Fishdirt Tin Toy Transformer

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    smooth on oomo
     
  9. Fishdirt

    Fishdirt Tin Toy Transformer

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    did some research and yes, I will give Vaseline a go. I just wish I knew why the spray release is not working.
     
  10. Zildjian

    Zildjian Well-Known Member

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  11. Bigbot3030

    Bigbot3030 Well-Known Member

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    Did you try the "season" that the ease relase calls for for new molds? And when you applied it did you do one quick coat, or did you do several light coats? I'm assuming you used the 200 aersol version (not the 205).
    Just trying to trouble shoot for ya, cause that's not making sense.

    Who knows, maybe with this silicone and the fact that you dont' have to degass it makes it different than other silicones, and it takes a bit more for it to release properly.

    Randy!
     
  12. Fishdirt

    Fishdirt Tin Toy Transformer

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    There was nothing about a "season" on the can. I did the intial directions. Didn't work. Then I did a spray, let it set and resprayed it a lot more then the intial. Nada. Did it again but with a third coat. Nada.
     
  13. Fishdirt

    Fishdirt Tin Toy Transformer

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    Found the season on a site.

    Vaseline did work amazingly.
     
  14. Insane Galvatron

    Insane Galvatron is not insane. Really!

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    Yeah, I used Allumilite a lot and they told me to use Vaseline. Works great.
     
  15. robvega214

    robvega214 Mp5_Brut

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    i use allumilite aswell...and the mold release liquid....works fine..never had the issue of 2 pieces stickin to each other.........
     
  16. Insane Galvatron

    Insane Galvatron is not insane. Really!

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    They were selling powder when I ordered from them. Just goes to show how long ago it was. The liquid was not available then, but they were aware of the powder not working and suggested Vaseline to me.
     
  17. Bigbot3030

    Bigbot3030 Well-Known Member

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    yeah sorry, i wasn't 100% clear, i was talking about the suggested way to use it off of the datasheet on the site, but hey if vaseline works than awesome.

    Randy!
     
  18. Fishdirt

    Fishdirt Tin Toy Transformer

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    Oddly enough alumilite corp is located near me yet they still sell there stuff way too overpriced for me. Makes me wonder if the local hobby lobby has to refill their supplies if they have to order through their main warehouse (not in Michigan) or if they go to the company in town (which doesn't have a brick and morter store).
     
  19. robvega214

    robvega214 Mp5_Brut

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    hobby town USA carries allumilite products.....ive seen them also at Hobby Lobby
     
  20. convoymagnus

    convoymagnus Yeshua Is Mashiach.

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    You must use MANN easy release between silicone pours. the other release agents are good to use in the mold to help release resin.

    You may also use vaseline brushed over the first part of the mold ( be careful not to contaminate the master in it or it will ruin your final casts)
     

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