simple filament fuser
thingiverse
stuck to a vise grip that locks closed for easy use, heat up the 2 ends of filament and place them into the mold so they touch. You may need another person to help you do this, then lock the grips closed and let it cool off. After it is cooled cut away the flashing and cycle it through your printer! The molds never melted on me and worked reliably.
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