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Thread: Making mould from painted plastic part but paint blistering

  1. #1
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    Making mould from painted plastic part but paint blistering

    Ok well im trying to copy a plastic badge and make a mould to replicate it. Its a badge thats painted one standard colour from factory. Now I have tried everyway i can think of to make a mould of it no matter if I slow dry the paint seems to blister and stuff it. I have gone through 6 badges and its starting to become costly any advice would be appreciated. I have applied mould relase wax several times before hand and still no fix. Im not sure why the paint is reacting any ideas of anything i can coat the badge in to stop this also the badge has a faint line on it so i cannot pack alot of anything on it or it will loose its line.

    I have attached a photo of what I mean.

    Any help would be appreciated cheers
    Attached Images Attached Images  

  2. #2
    Senior Member Quso's Avatar
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    Try rubber mold

  3. #3
    Senior Member TwilightZ's Avatar
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    silicone mold or use epoxy resin to reduce heat.

  4. #4
    its chemical reaction between part and mold. use some other material to make mold off the part or you may need to go in couple stapes, ie silicone/rubber mold. remake the part and make fibreglass mold out of the reproduced part

  5. #5
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    silicone mould what exactly is that? I have not done that before im used to just replicateing the part with fiberglass.

  6. #6
    Senior Member Quso's Avatar
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    Just type rubber or silicone mold making in youtube
    For bigger parts you will need 2 stage mold silicone and a hard shell

    Or just sand off the paint from your plug and problem solved
    Last edited by Quso; 02-05-2013 at 10:01 PM.

  7. #7
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    My question is why you are painting the part? Or, is it painted when you get it? What you are seeing in the wrinkled paint is heat related. You can get rubberized mold material up to a high degree of stiffness that will transfer minute detail. You can also cast the part in plastic without having to make if from fiberglass unless you just want to or need to.

    EconŽ 80 Urethane Rubber Product Information | Smooth-On

    There is a wealth of info at this site and they are a good company to deal with.

    Do a search for rubber molds and you will be amazed what you find!

    Mike

  8. #8
    Senior Member dwheeler's Avatar
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    It seems like you could also strip the paint off the part before molding it. But I've never made a mold before, so don't take me as an expert.

  9. #9
    I have always had great success with
    http://www.freemansupply.com/datashe...AM2070tech.pdf
    It is a non-silicone rubber molding material. Awesome stuff.

    Synair - Pour-a-mold 2070.

  10. #10
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    Jim I tried to find that last night but could not. I got a big bag of samples from them yrs ago and you are right, the material comes in a wide variety of hardnesses and uses!

    Mike

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