A piece of filament is inserted into the Dremel's mandrel and rotated in contact with the part so that the filament, melted by friction, fills the gaps and bonds the PLA parts. This technique doesn't require glue or any other material: it consists of friction welding the PLA using a Dremel or any other rotary tool. You can use acetone to join large flat surfaces of ABS.
However, the surfaces of the pieces soften enough to allow them to stick to each other. Glueing PLA using acetone is an experimental technique that I discovered in the following video of Thomas Sanladerer, one of the most famous 3D printing youtubers.Īs you're going to see, the initial intention of the video was to smooth the PLA pieces with acetone, but the result is not very satisfactory. You can use a gas or electric pistol, the only difference is that it warms up a little earlier and can be carried around the workshop without worrying about the cable. This is the hot-melt gun that I have, a Parkside gas model. For both gluing and smoothing, you will be able to use any epoxy resin with the proper consistency (which allows you to apply it with a brush to work the piece for 10-15 minutes). The most famous product I have tried is SmoothOn's XTC-30 resin. You can also use epoxy to improve the surface finishing with the epoxy smoothing technique (apply an external layer to the part to remove 3D printing layer marks).īut you will have to endure the main disadvantage, which is that preparing, manipulating and applying epoxy is much more complicated and has to be done in a space that you don't mind dirtying and well ventilated so as not to breathe the gases it gives off.Ī lot of epoxy resins are sold to smooth 3D printing parts and any of them will help you to glue your pieces: you will kill two birds with one stone.You can fill small gaps if the two bonding surfaces are not flat enough or cracks remain.You'll get a stronger bond than with conventional adhesives and glues.If you decide to glue the PLA pieces with epoxy you will have 3 extra advantages: I have personally tried UHU for hard plastics, but there is nothing to envy about bonding it with a more typical cyanoacrylate glue. Many brands of adhesives sell specific adhesives for plastics, because generally these are a little difficult to glue. It is a glue that works for everything, including PLA it allows to bond it in an easy and fast way with an adhesive that almost all of us have for our home or workshop. Cyanoacrylate is the technical name of the adhesives we know as Super Glue, Loctite, extra-strong glue or instant glue.
I prefer it on small tubes so it won't spoil if I don't use it in a while. Cyanoacrylate glue is usually the best choice for bonding PLA parts.
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