The benefits of rigid FDM 3d printed mold cases for silicone mold resin casting.
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- Опубликовано: 3 сен 2022
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In this video I'll lay out the benefits of rigid FDM 3d printed mold cases as I see them. I've been using these for a while for my silicone molds rather than building them out of other materials like acrylic, lego or MDF. So far they've been working well for me. I print my mold cases at around 2mm wall thickness with a brim so they stick to the bed well.
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#casting #handmade #3dprinting 
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If you've got any tips for printing mold cases leave them in the comments below.
Two part 3D printed mold casings are also becoming more popular. Each half will have two tabs and you can just Buffalo clip them together. Tho you need even thicker walls.
Rybonator used one in a recent video if you want to see what I'm talking about. (video title: Making Dice from my Brand New Master Molds) Though it's a bit of a bad example. The tabs are too thick and need to be bolted together which is a bit too much in my opinion. A friend of mine has been doing this with just buffalo clips for about a year now.
That's a cool idea, I haven't seen that before, will have to check it out, thanks!
extra thick might be what I need, Im looking at doing a 4 inch resin cube and I need it to be perfect since its gonna hold hair from my dead cat so I cant do it again if I mess up, I have a silicone mold but its really bendy so maybe bracing the outside will help
@@shyowl3453 Yes, an outer shell will definitely help keep it's shape. 4 inches isn't that big though so I don't think it would need to be too thick. If your just making one of these maybe modeling and 3d printing is more work than you need. You could cut some foam core/balsa wood/Masonite etc. and make a box with that and hot glue as a cheaper/quicker alternative. I've seen where some very thin silicone molds from amazon come with a laser cut mdf shell to put around it.
Might be able to print these in vase mode with a 1mm nozzle, but probably not the best solution unless you have multiple printers
Hello, how do I smooth 3D prints before molding them? If it is not smooth the mold will not be shiny when unmolding, right? Do you have any advice ? THANKS
That's the longest/most difficult part of the whole casting process. If the object is very simple you can just sand and polish it. The resin I use (sirayatech build) polishes up quite nice. I sand from around 220 grit up to 4000 not skipping any grits, then I use Meguiars ultimate compound. And if it's still not shiny enough I finish with 3M finest grit polish. If the part is really intricate I'll sand it smooth and use an automotive fill primer and air dry spottin/glazing putty (bondo) to fill imperfections. When it's smooth enough I'll spray it with a 2K automotive urethane paint, which will harden in about a week. Essentially it's just like doing body work on a car, but on a much small object. You can see some of this process in my calligraphy inkwell video.
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