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3D Printer Filament Extruded from Pellets
Filament is made the way a 3D printer prints, only continuously: dry plastic pellets fall from a hopper onto a turning screw inside a heated barrel, melt as they are carried forward, and are pushed out through a round nozzle. The strand is cooled in air or a water bath, drawn by a puller at a steady speed so it keeps its diameter, and wound on a spool. Commercial 1.75 mm filament is typically held to about ±0.02 mm; a small line should be measured.
PETG and many other plastics take up moisture, which makes bubbles and weak prints: makers dry PETG at about 55–70 °C for 5–8 hours, depending on the resin. Melt temperatures follow the resin's datasheet; PETG is usually printed at about 230–260 °C.
中级
A day per few kilograms
说明
1
1
Dry the pellets
Dry the pellets
Dry the pellets in a dryer as the resin maker specifies; for PETG about 55–70 °C for 5–8 hours.
此步骤所需材料：
PETG颗粒2 公斤
可生物降解塑料颗粒（PLA）2 公斤
ABS颗粒2 公斤所需工具：
颗粒干燥机
数字厨房秤2
2
Heat the barrel
Heat the barrel
Set the barrel's heating zones to rise from the hopper end to the nozzle within the resin's datasheet range and let them settle.
所需工具：
单螺杆挤出机料筒
颗粒进料斗3
3
Extrude
Extrude
Fill the hopper and start the screw slowly. Purge until the strand comes out clear of old material and bubbles.
所需工具：
单螺杆挤出机料筒颗粒进料斗
耐热手套
安全眼镜4
4
Cool and pull
Cool and pull
Lead the strand through a water bath or past the fan to the puller. Adjust the puller's speed: faster pulls the strand thinner, slower lets it swell.
此步骤所需材料：
水50 升所需工具：
100 升大塑料盆
箱式风扇（可调速）
线材牵引收卷机5
5
Measure and wind
Measure and wind
Measure the diameter every few metres and wind the filament on a spool. Keep it sealed and dry.
所需工具：
6 英寸数显卡尺线材牵引收卷机数字厨房秤6
6
Troubleshooting
Troubleshooting
Filament extrusion troubleshooting.
Flow
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