Table 4.
Workflow for coated and uncoated filaments.
| work steps | PETG (control group) | PLA (control group) | PETG + nHA | PLA + nHA | PETG + nFA | PLA + nFA |
|---|---|---|---|---|---|---|
| 1. | insert filament spool (colorFabb_HT clear, 1.75 mm, colorFabb B.V., Netherlands) | inserting filament spool (extrudr PLA NX2 white, Extrudr FD3D GmbH, Austria) | insert filament spool (colorFabb_HT clear, 1.75 mm, colorFabb B.V., Netherlands) | inserting filament spool (extrudr PLA NX2 white, Extrudr FD3D GmbH, Austria) | insert filament spool (colorFabb_HT clear, 1.75 mm, colorFabb B.V., Netherlands) | inserting filament spool (extrudr PLA NX2 white, Extrudr FD3D GmbH, Austria) |
| 2. | – | – | insert sieve (sieve insert and pestle each made from newly manufactured PETG) | insert sieve (sieve insert and pestle each made from newly manufactured PLA) | insert sieve (sieve insert and pestle each made from newly manufactured PETG) | insert sieve (sieve insert and pestle each made from newly manufactured PLA) |
| 3. | – | – | usage of a total of 4g nHA (Kalident Powder 100 1ST B (17 kGy), Kalichem srl, Italy) in portions with sterile cement spatula, nitrile examination gloves and bench scales; seven from nHA | usage of a total of 4g nHA (Kalident Powder 100 1ST B (17 kGy), Kalichem srl, Italy) in portions with sterile cement spatula, nitrile examination gloves and bench scales; seven from nHA | usage of a total of 4g nFA (Charge: RC2206379; S&C Polymer GmbH, Germany) in portions with sterile cement spatula, nitrile examination gloves and bench scales; seven from nFA | usage of a total of 4g nFA (Charge: RC2206379; S&C Polymer GmbH, Germany) in portions with sterile cement spatula, nitrile examination gloves and bench scales; seven from nFA |
| 4. | – | – | turn on peltier elements (U = 12 V, I = 5 A) | turn on peltier elements (U = 12 V, I = 5 A) | turn on peltier elements (U = 12 V, I = 5 A) | turn on peltier elements (U = 12 V, I = 5 A) |
| 5. | filament feeding for t = 120 s (U = 12 V, I = 0.5 A) | filament feeding for t = 120 s (U = 12 V, I = 0.5 A) | filament feeding for t = 120 s (U = 12 V, I = 0.5 A) | filament feeding for t = 120 s (U = 12 V, I = 0.5 A) | filament feeding for t = 120 s (U = 12 V, I = 0.5 A) | filament feeding for t = 120 s (U = 12 V, I = 0.5 A) |
| 6. | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) |
| 7. | – | – | control target temperature: 100 °C | control target temperature: 66 °C | control target temperature: 100 °C | control target temperature: 66 °C |
| 8. | separation and discarding of filament after passage through copper tube | separation and discarding of filament after passage through copper tube | separation and discarding of filament after passage through copper tube | separation and discarding of filament after passage through copper tube | separation and discarding of filament after passage through copper tube | separation and discarding of filament after passage through copper tube |
| 9. | filament feeding for t = 900 s (U = 12 V, I = 0.5 A) | filament feeding for t = 900 s (U = 12 V, I = 0.5 A) | filament feeding for t = 900 s (U = 12 V, I = 0.5 A) | filament feeding for t = 900 s (U = 12 V, I = 0.5 A) | filament feeding for t = 900 s (U = 12 V, I = 0.5 A) | filament feeding for t = 900 s (U = 12 V, I = 0.5 A) |
| 10. | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) | stop filament feeding (U = 0 V, I = 0 A) |
| 11. | separation of filament after passage through the copper tube | separation of filament after passage through the copper tube | separation of filament after passage through the copper tube | separation of filament after passage through the copper tube | separation of filament after passage through the copper tube | separation of filament after passage through the copper tube |
| 12. | separation of filament after passage through the copper tube and storage of PETG filament in 3l all-purpose bag; cleaning of container | separation of filament after passage through the copper tube and storage of PLA filament in 3l all-purpose bag; cleaning of container | separation of nHA coated filament after passage through the copper tube and storage of PETG filament in 3l all-purpose bag; cleaning of container | separation of nHA coated filament after passage through the copper tube and storage of PLA filament in 3l all-purpose bag; cleaning of container | separation of nFA coated filament after passage through the copper tube and storage of PETG filament in 3l all-purpose bag; cleaning of container | separation of nFA coated filament after passage through the copper tube and storage of PLA filament in 3l all-purpose bag; cleaning of container |
| 13. | – | . | switching off peltier elements and stop filament feeding for t = 300 s (U = 12 V, I = 0.5 A) | switching off peltier elements and stop filament feeding for t = 300 s (U = 12 V, I = 0.5 A) | switching off peltier elements and stop filament feeding for t = 300 s (U = 12 V, I = 0.5 A) | switching off peltier elements and stop filament feeding for t = 300 s (U = 12 V, I = 0.5 A) |
| 14. | return of filament for 120 s by reversing the polarity (U = 12 V, I = 0.5 A) | return of filament for 120 s by reversing the polarity (U = 12 V, I = 0.5 A) | return of filament for 120 s by reversing the polarity (U = 12 V, I = 0.5 A) | return of filament for 120 s by reversing the polarity (U = 12 V, I = 0.5 A) | return of filament for 120 s by reversing the polarity (U = 12 V, I = 0.5 A) | return of filament for 120 s by reversing the polarity (U = 12 V, I = 0.5 A) |
| 15. | removing filament spool | removing filament spool | removing filament spool | removing filament spool | removing filament spool | removing filament spool |
| 16. | – | – | – | cleaning powder feed with vacuum cleaner and round wire | – | cleaning powder feed with vacuum cleaner and round wire |