In micro injection molding, the specific cavity surface texture and roughness directly influence the polymer flow and the heat transfer between polymer melt and mold. In this work, two different types of laser-induced periodic surface structures, linear and hexagonal, were generated, and their impact on the flow length in micro injection molding was evaluated. A complete investigation of the surface treatment effect on the polymer flow was carried out, comparing the performance of an untreated cavity surface with surfaces modified by LIPSS. The phenomenon was examined by localizing the weld lines created by the polymer flowing in two parallel channels having different surface treatments. Several cavity inserts were treated by varying the LIPSS process parameters to generate surfaces with different micro-and nanostructures directions and periodicity. Furthermore, the paper addresses the hydro-phobicity achieved on the micro molded surfaces replicated from mold inserts with different LIPSS-based surface topography. Mold surfaces with linear and hexagonal LIPSS and the respective molded parts were analyzed by optical profilometry and scanning electron microscopy to characterize the cavity surfaces replication and localize the weld lines on the micro injection molded parts.

Effects of anisotropic and isotropic LIPSS on polymer filling flow and wettability of micro injection molded parts / Gnilitskyi, I.; Alnusirat, W.; Sorgato, M.; Orazi, L.; Lucchetta, G.. - In: OPTICS AND LASER TECHNOLOGY. - ISSN 0030-3992. - 158:(2023), pp. 108795-108802. [10.1016/j.optlastec.2022.108795]

Effects of anisotropic and isotropic LIPSS on polymer filling flow and wettability of micro injection molded parts

Orazi L.;
2023

Abstract

In micro injection molding, the specific cavity surface texture and roughness directly influence the polymer flow and the heat transfer between polymer melt and mold. In this work, two different types of laser-induced periodic surface structures, linear and hexagonal, were generated, and their impact on the flow length in micro injection molding was evaluated. A complete investigation of the surface treatment effect on the polymer flow was carried out, comparing the performance of an untreated cavity surface with surfaces modified by LIPSS. The phenomenon was examined by localizing the weld lines created by the polymer flowing in two parallel channels having different surface treatments. Several cavity inserts were treated by varying the LIPSS process parameters to generate surfaces with different micro-and nanostructures directions and periodicity. Furthermore, the paper addresses the hydro-phobicity achieved on the micro molded surfaces replicated from mold inserts with different LIPSS-based surface topography. Mold surfaces with linear and hexagonal LIPSS and the respective molded parts were analyzed by optical profilometry and scanning electron microscopy to characterize the cavity surfaces replication and localize the weld lines on the micro injection molded parts.
2023
4-nov-2022
158
108795
108802
Effects of anisotropic and isotropic LIPSS on polymer filling flow and wettability of micro injection molded parts / Gnilitskyi, I.; Alnusirat, W.; Sorgato, M.; Orazi, L.; Lucchetta, G.. - In: OPTICS AND LASER TECHNOLOGY. - ISSN 0030-3992. - 158:(2023), pp. 108795-108802. [10.1016/j.optlastec.2022.108795]
Gnilitskyi, I.; Alnusirat, W.; Sorgato, M.; Orazi, L.; Lucchetta, G.
File in questo prodotto:
File Dimensione Formato  
Effects of anisotropic and isotropic LIPSS on polymer filling flow and wettability of micro injection molded parts.pdf

Open access

Tipologia: Versione pubblicata dall'editore
Dimensione 5.44 MB
Formato Adobe PDF
5.44 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1314146
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 3
social impact