We’re accustomed to covering the use of 3D printing in casting, usually as a lost-PLA former in metal casting. That’s not the only use of the technique though, and perhaps one of the si…
  • RegalPotoo@lemmy.worldEnglish
    15·
    5 months ago

    Having tried similar things, I cannot stress enough how much you want to be printing molds like this in TPU unless you really really want your mold to be permanently embedded in the concrete

    • JustEnoughDucks@feddit.nlEnglish
      7·
      4 months ago

      You can also print the object and use it to make a silicone mold, right? That doesn’t stick to concrete.

    • Mora@pawb.socialEnglish
      7·
      4 months ago

      The advice on sex toys (not cement!) I’ve read suggests using beeswax. I wonder if this would work as well🤔

    • hooferboof@lemmy.worldEnglish
      2·
      4 months ago

      Pla and a heatgun works but its not ideal. Definitely takes a while to melt off from more complex geometries akd isnt reusable.

      In theory ABS is acetone soluable but ive been having a hard time coming up with a usecase where acetone is preferable to anything else

    • ROLLER@twit.social
      1·
      4 months ago

      @RegalPotoo @Wilshire good point. Release agents are used for casting concrete. They look to be oil and water mix so I’m guessing most plastics would be compatible.
      Also has to be a clear path out for the print/concrete.