Jump to content

Filaments dissolves in what ?


Nueiba

Recommended Posts

Posted · Filaments dissolves in what ?

HI and thanks for your appreciated help.

I am a hobbyist and I wonder what will happen to my 3D print when I'll try to make a mold with it.

For example; If I use my PLA printed part and immerge it in a urethane based product, or an epoxy resin. Will it melt ? 

 

To turn around the question.  

What filament will not melt with urethane, epoxy resins and silicone ?

That is what I'd really want to know.

 

Regards !

  • Link to post
    Share on other sites

    Posted · Filaments dissolves in what ?

    Maybe you need to make a distinction between "chemically melt" (dissolve) and thermally melt (high temp)?

     

    Most epoxies I have used are very exothermic reactions: they get extremely hot. So, these will melt a PLA mould for sure. I don't know about PU, but I believe it is also exothermic? So you need to search for slow-curing, low-exothermic versions (usually they do exist). Added benefit is that these shrink less than fast-curing

     

    But PU and epoxies may also bond very strongly to PLA, so you need a good separator: multiple layers of silicone or PTFE-separator spray, or other. And even then... Try it on small test pieces first. As far as I know, PU or epoxies will not chemically dissolve PLA.

     

    Silicone depends: there are sticky silicones like the sanitary versions. And there are non-stick versions for mould-making. None of those that I used caused real warm-up, so I guess these should be temp-safe. Also, silicones are chemically quite inert, so they should not dissolve anything.

     

    Another option would be to use the PLA to make a positive model, and then use silicone to make the mould from that PLA-model. And maybe make a hard shell in PLA too around the mould, to keep the silicone in place, so it does not deform (may happen if you use very flexible silicone). In Youtube, search for: mould making and casting. There are lots of good tutorials.

     

  • Link to post
    Share on other sites

    Posted · Filaments dissolves in what ?

    Thank you for your 'articulate' answer. 

    I'll make small tests has you mentioned. Your answer gives me orientation in the material I can print with. (PLA)

     

    I've also discover the Smooth-on answer to my question.

    They recommend the coatings of XTC-3D, to protect the model. 

     

    I realize that in the modeling world, everyone wants to sell you something that you may not need... Or worse, inappropriate material.

     

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
         
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
      • Ultimaker Cura 5.6 stable released
        Cura now supports Method series printers!
         
        A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
        • 48 replies
    ×
    ×
    • Create New...