Polycarbonate is brittle or I am doing something wrong?
Posted by Khumarahn
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Polycarbonate is brittle or I am doing something wrong? July 30, 2020 12:21PM |
Hi, I am looking for an advice about polycarbonate, which seems strangely brittle.
I *think* I know how to print PC, at least I can get strong and dimensionally accurate results, at least initially. But the parts which I used for my printer (e.g. hotend mount, bed mounts) crack with time, see my photo.
If in use long enough, they just fall apart along the crack lines. I replace what I can with ABS, and that works very well (though lacks stiffness and temperature resistance).
I use PC for temperature critical parts of my printer, which has a heated chamber reaching 70C (or even 80C). Perhaps, cracking is related to mechanical stress (even minor), like a screw holding the part to a linear rail, and to frequent temperature changes. The filament I use is ICE Filaments PC PRO. I did not try any other PC filaments.
Is the kind of cracking I see normal? Maybe I am unlucky with the filament choice?
I *think* I know how to print PC, at least I can get strong and dimensionally accurate results, at least initially. But the parts which I used for my printer (e.g. hotend mount, bed mounts) crack with time, see my photo.
If in use long enough, they just fall apart along the crack lines. I replace what I can with ABS, and that works very well (though lacks stiffness and temperature resistance).
I use PC for temperature critical parts of my printer, which has a heated chamber reaching 70C (or even 80C). Perhaps, cracking is related to mechanical stress (even minor), like a screw holding the part to a linear rail, and to frequent temperature changes. The filament I use is ICE Filaments PC PRO. I did not try any other PC filaments.
Is the kind of cracking I see normal? Maybe I am unlucky with the filament choice?
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