Abstract
Diode laser transmission welding was well established as a leading technique for industrial applications of joining plastics. The weld soundness of plastics depends on several variables like the non-isothermal crystallization, the germs growth rate, the dimensions of the heat-affected zone induced by recrystallization. Firstly, this paper proves the reliability of a numerical model based on the finite difference method at calculating the soundness variables for diode laser welding of polypropylene thermoplastic polymer. The numerical model was validated by microscopy observation of experimental polypropylene welds. Then a parametric study on the effects of the laser power and welding speed on the weld soundness variables is presented through a number of plots of the main process variables against time. The overall investigation gives a detailed picture of the influence of laser power and welding speed on the weld soundness from a microstructure point of view.
Similar content being viewed by others
References
Kurosaki Y (2005) Radiative heat transfer in plastic welding process. J Quant Spectrosc Radiat Transfer 93:25–41
Boglea A, Olowinsky A, Gillner A (2007) Fiber laser welding for packaging of disposable polymeric microfluidic-biochips. Appl Surf Sci 254:1174–1178
Haberstroh E, Hoffmann WM (2007) Laser welding of micro plastic parts. International Society for Optical Engineering (SPIE), Proceedings of Photonics West Conference, San Jose (CA), USA
Herziger G, Schloms R (1995) IR Lasers as tools for the future. Infrared Phys Technol 36:401–406
Coelho JMP, Abreu MA, Pires MC (2000) High-speed laser welding of plastic films. Opt Lasers Eng 34:385–395
Potente H, Korte J, Becker F (1999) Laser transmission welding of thermoplastics: analysis of the heating phase. J Reinf Plast Compos 18:914–920
Bachmann F (2003) Industrial applications of high power diode lasers. Appl Surf Sci 208–209:125–136
Ghorbel E, Casalino G, Abed S (2009) Laser diode transmission welding of polypropylene: geometrical and microstructure characterisation of weld. J Mater Design 30:2745–2751
Mubarak Y, Harkin-Jones EMA, Martin PJ, Ahmad M (2001) Modeling of non-isothermal crystallization kinetics of isotactic polypropylene. Polyme 42:3171–3182
Albano C, Papa J, González E, Navarro O, González R (2003) Temperature and crystallinity profiles in polyolefines isothermal and non-isothermal solidification processes. Eur Polyme J 39:1215–1222
Poitou A, Ammar A (2001) Cristallisation induite par écoulement ou par déformation d’un polymère-une approche thermodynamique. Mech Solids and Struct 329:5–11
Masubuchi Y, Watanabe K, Nagatake W, Takimoto J-I, Koyama K (2001) Thermal analysis of shear induced crystallization by the shear flow thermal rheometer: isothermal crystallization of polypropylene. Polyme 42:5023–5027
Albano C, Papa J, Ichazo M, González J, Ustariz C (2003) Application of different macrokinetic models to the isothermal crystallization of PP-talc blends. Compos Struct 62:291–302
Coccorullo I, Pantani R, Titomanlio G (2003) Crystallization kinetics and solidified structure in iPP under high cooling rates. Polyme 44:307–318
Casalino G, Ghorbel E (2008) Numerical model of CO2 laser welding of thermoplastic polymers. J Mater Process Technol 207:63–71
Kneip JC, Martin B, Loredo A, Mattei S, Grevey D (2004) Heat transfer in semi-transparent materials during laser interaction. Mater Process Technol 155–156:1805–1809
Majumdar P, Xia H (2007) Green’s function model for the analysis of laser heating of materials. Appl Math Modelling 31:1186–1200
Van Krevelen SDW (1990) Properties of polymer. Elsevier, Amsterdam
Abed S, Laurens P, Carrétéro C, Deschamps JR, Duval C (2001) Diode Laser Welding of Polymers: Microstructure of the Welded Zones for Polypropylene. ICALEO 2001 Congress Proc, Jacksonville, USA
Zhu X, Li Y, Yan D, Fang Y (2001) Crystallization behavior of partially melting isotactic polypropylene. Polyme 42:9217–9222
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Hadriche, I., Ghorbel, E., Masmoudi, N. et al. Investigation on the effects of laser power and scanning speed on polypropylene diode transmission welds. Int J Adv Manuf Technol 50, 217–226 (2010). https://doi.org/10.1007/s00170-009-2511-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00170-009-2511-z