Real-Time Monitoring of Pellet Plastication in a Full-Flight Screw and Kneading Disk Elements of a Co-Rotating Self-Wiping Twin-Screw Extruder by Acoustic Emission (AE) Sensing
The plastication of pellets in a co-rotating twin-screw extruder is a significant concern for product homogeneity and stability in the plastic industry. We developed a sensing technology for pellet plastication in a plastication and melting zone in a self-wiping co-rotating twin-screw extruder. The...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/5/1140 |
| _version_ | 1797614544842915840 |
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| author | Tsukasa Kida Masatoshi Ohara Keigo Inamori Shogo Nagasawa Shin-ichi Kihara Kentaro Taki |
| author_facet | Tsukasa Kida Masatoshi Ohara Keigo Inamori Shogo Nagasawa Shin-ichi Kihara Kentaro Taki |
| author_sort | Tsukasa Kida |
| collection | DOAJ |
| description | The plastication of pellets in a co-rotating twin-screw extruder is a significant concern for product homogeneity and stability in the plastic industry. We developed a sensing technology for pellet plastication in a plastication and melting zone in a self-wiping co-rotating twin-screw extruder. The collapse of the solid part of the pellets emits an elastic wave as an acoustic emission (AE) that is measured on the kneading section of the twin-screw extruder using homo polypropylene pellets. The recorded power of the AE signal was used as an indicator of the molten volume fraction (MVF) in the range of zero (fully solid) to unity (fully melted). MVF decreased with increasing feed rate monotonically in the range of 2–9 kg/h at a screw rotation speed of 150 rotations per minute (rpm) because of the reduction in the residence time of pellets in the extruder. However, the increase in feed rate from 9 to 23 kg/h at 150 rpm resulted in an increase in the MVF as the friction and compaction of pellets caused their melting. The AE sensor could elucidate the pellet’s plastication phenomena caused by friction, compaction of pellets, and melt removal in the twin-screw extruder. |
| first_indexed | 2024-03-11T07:13:59Z |
| format | Article |
| id | doaj.art-c8b560243c8a4bf3b43ad726a018458c |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T07:13:59Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-c8b560243c8a4bf3b43ad726a018458c2023-11-17T08:26:43ZengMDPI AGPolymers2073-43602023-02-01155114010.3390/polym15051140Real-Time Monitoring of Pellet Plastication in a Full-Flight Screw and Kneading Disk Elements of a Co-Rotating Self-Wiping Twin-Screw Extruder by Acoustic Emission (AE) SensingTsukasa Kida0Masatoshi Ohara1Keigo Inamori2Shogo Nagasawa3Shin-ichi Kihara4Kentaro Taki5Department of Natural System, Graduate School of Natural Science, Kanazawa University, Kanazawa 920-1192, JapanShibaura Machine, Numazu 410-8510, JapanDepartment of Natural System, Graduate School of Natural Science, Kanazawa University, Kanazawa 920-1192, JapanDepartment of Natural System, Graduate School of Natural Science, Kanazawa University, Kanazawa 920-1192, JapanGraduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima 739-8527, JapanSchool of Frontier Engineering, Kanazawa University, Kanazawa 920-1192, JapanThe plastication of pellets in a co-rotating twin-screw extruder is a significant concern for product homogeneity and stability in the plastic industry. We developed a sensing technology for pellet plastication in a plastication and melting zone in a self-wiping co-rotating twin-screw extruder. The collapse of the solid part of the pellets emits an elastic wave as an acoustic emission (AE) that is measured on the kneading section of the twin-screw extruder using homo polypropylene pellets. The recorded power of the AE signal was used as an indicator of the molten volume fraction (MVF) in the range of zero (fully solid) to unity (fully melted). MVF decreased with increasing feed rate monotonically in the range of 2–9 kg/h at a screw rotation speed of 150 rotations per minute (rpm) because of the reduction in the residence time of pellets in the extruder. However, the increase in feed rate from 9 to 23 kg/h at 150 rpm resulted in an increase in the MVF as the friction and compaction of pellets caused their melting. The AE sensor could elucidate the pellet’s plastication phenomena caused by friction, compaction of pellets, and melt removal in the twin-screw extruder.https://www.mdpi.com/2073-4360/15/5/1140pellet plasticationacoustic emissionmelt removaltwin-screw extrusion |
| spellingShingle | Tsukasa Kida Masatoshi Ohara Keigo Inamori Shogo Nagasawa Shin-ichi Kihara Kentaro Taki Real-Time Monitoring of Pellet Plastication in a Full-Flight Screw and Kneading Disk Elements of a Co-Rotating Self-Wiping Twin-Screw Extruder by Acoustic Emission (AE) Sensing Polymers pellet plastication acoustic emission melt removal twin-screw extrusion |
| title | Real-Time Monitoring of Pellet Plastication in a Full-Flight Screw and Kneading Disk Elements of a Co-Rotating Self-Wiping Twin-Screw Extruder by Acoustic Emission (AE) Sensing |
| title_full | Real-Time Monitoring of Pellet Plastication in a Full-Flight Screw and Kneading Disk Elements of a Co-Rotating Self-Wiping Twin-Screw Extruder by Acoustic Emission (AE) Sensing |
| title_fullStr | Real-Time Monitoring of Pellet Plastication in a Full-Flight Screw and Kneading Disk Elements of a Co-Rotating Self-Wiping Twin-Screw Extruder by Acoustic Emission (AE) Sensing |
| title_full_unstemmed | Real-Time Monitoring of Pellet Plastication in a Full-Flight Screw and Kneading Disk Elements of a Co-Rotating Self-Wiping Twin-Screw Extruder by Acoustic Emission (AE) Sensing |
| title_short | Real-Time Monitoring of Pellet Plastication in a Full-Flight Screw and Kneading Disk Elements of a Co-Rotating Self-Wiping Twin-Screw Extruder by Acoustic Emission (AE) Sensing |
| title_sort | real time monitoring of pellet plastication in a full flight screw and kneading disk elements of a co rotating self wiping twin screw extruder by acoustic emission ae sensing |
| topic | pellet plastication acoustic emission melt removal twin-screw extrusion |
| url | https://www.mdpi.com/2073-4360/15/5/1140 |
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