Abstract
| Original language | English |
|---|---|
| Article number | 020013 |
| Journal | AIP Conference Proceedings |
| Volume | 2205 |
| Issue number | 1 |
| Number of pages | 5 |
| ISSN | 0094-243X |
| DOIs | |
| Publication status | Published - 2020 |
| Event | 35th International Conference of the Polymer Processing Society (PPS-35) - Çeşm-Izmir , Turkey Duration: 26 May 2019 → 30 May 2019 |
Conference
| Conference | 35th International Conference of the Polymer Processing Society (PPS-35) |
|---|---|
| Country | Turkey |
| City | Çeşm-Izmir |
| Period | 26/05/2019 → 30/05/2019 |
Keywords
- Functional Surface
- Micro-Structured Surface
- Injection Molding
- Thermoplastic
Cite this
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Influences of micro-ridges orientation and position on the replication of micro-structured surfaces by injection molding. / Regi, Francesco; Basso, Alberto; Kain, Martin; Loaldi, Dario; Li, Dongya; Zhang, Yang; Tosello, Guido.
In: AIP Conference Proceedings, Vol. 2205, No. 1, 020013, 2020.Research output: Contribution to journal › Conference article › Research › peer-review
TY - GEN
T1 - Influences of micro-ridges orientation and position on the replication of micro-structured surfaces by injection molding
AU - Regi, Francesco
AU - Basso, Alberto
AU - Kain, Martin
AU - Loaldi, Dario
AU - Li, Dongya
AU - Zhang, Yang
AU - Tosello, Guido
PY - 2020
Y1 - 2020
N2 - In this work, directional optical properties were achieved with a microstructure composed of a close array of ridges, defined by their width and by the angle with respect to the main surface. Under constrained lighting, the reflectance was maximized from a certain viewing angle and direction, and minimized from its horizontally orthogonal position. The purpose was generating quick response codes (i.e. Data matrix) that could be easily scanned by means of commercially available software. The ridges were 1.2 mm long, 0.2 mm wide and with a 10° slope angle, for a depth of about 0.03 mm. Each code was defined by 10x10 modules, each composed of 6 ridges. The code was machined on a tool insert and replicated by means of Injection Moulding. This study investigated the effect of the ridge orientation with respect to flow front and the effect of the distance from the gate The inserts have then been replicated using Acrylonitrile butadiene styrene (ABS). Inserts and replicates were characterized using a Olympus Lext OLS4100 Laser Confocal microscope. Values of height, slope and roughness of the milled ridges and their replicates have been measured. The results showed that ridges parallel to the flow on the replicates had better replication accuracy and that, contrary to the expectations, ridges closer to the gate were replicated worse than the micro-structures far from the gate.
AB - In this work, directional optical properties were achieved with a microstructure composed of a close array of ridges, defined by their width and by the angle with respect to the main surface. Under constrained lighting, the reflectance was maximized from a certain viewing angle and direction, and minimized from its horizontally orthogonal position. The purpose was generating quick response codes (i.e. Data matrix) that could be easily scanned by means of commercially available software. The ridges were 1.2 mm long, 0.2 mm wide and with a 10° slope angle, for a depth of about 0.03 mm. Each code was defined by 10x10 modules, each composed of 6 ridges. The code was machined on a tool insert and replicated by means of Injection Moulding. This study investigated the effect of the ridge orientation with respect to flow front and the effect of the distance from the gate The inserts have then been replicated using Acrylonitrile butadiene styrene (ABS). Inserts and replicates were characterized using a Olympus Lext OLS4100 Laser Confocal microscope. Values of height, slope and roughness of the milled ridges and their replicates have been measured. The results showed that ridges parallel to the flow on the replicates had better replication accuracy and that, contrary to the expectations, ridges closer to the gate were replicated worse than the micro-structures far from the gate.
KW - Functional Surface
KW - Micro-Structured Surface
KW - Injection Molding
KW - Thermoplastic
U2 - 10.1063/1.5142928
DO - 10.1063/1.5142928
M3 - Conference article
VL - 2205
JO - A I P Conference Proceedings Series
JF - A I P Conference Proceedings Series
SN - 0094-243X
IS - 1
M1 - 020013
ER -