“Modeling of a lay-flat plastic hose extrusion process”

Authors: Ellen Nordgård-Hansen, Rune Schlanbusch and Thore Jarle Sørensen,
Affiliation: Teknova AS and Fenner Mandals
Reference: 2017, Vol 38, No 3, pp. 111-121.

Keywords: Extrusion, Response surfaces, Experimental design

Abstract: Many complex processes have a low degree of automation, and oftentimes important quality information is only available hours or even days after the production is completed. This article shows how multivariate design and response surface modeling were applied to a lay-flat plastic hose extrusion process in a full-scale experiment. Clear quantitative relationships were found, which to a large degree match existing qualitative process understanding. For instance, it was quantified how adhesion improves with increased extrusion screw speed and extrusion head temperature. The results can readily be used to inform the operators in real-time of important quality parameters of the hose currently under production. The clear results also indicate that increased process automation is achievable.

PDF PDF (551 Kb)        DOI: 10.4173/mic.2017.3.1

[1] Abeykoon, C., Martin, P., Li, K., and Kelly, A. (2014). Abeykoon, C, , Martin, P., Li, K., and Kelly, A. Dynamic modelling of die melt temperature profile in polymer extrusion: Effects of process settings, screw geometry and material. Applied Mathematical Modelling. 38(4):1224--1236. doi:10.1016/j.apm.2013.08.004
[2] ANSYS. (2017). ANSYS, ANSYS. 2017. www.ansys.com/products/fluids/ansys-polyflow. .
[3] Bereaux, Y., Charmeau, J.-Y., and Moguedet, M. (2009). Bereaux, Y, , Charmeau, J.-Y., and Moguedet, M. A simple model of throughput and pressure development for single screw. Journal of Materials Processing Technology. 209(1):611--618. doi:10.1016/j.jmatprotec.2008.02.070
[4] Chung, C. (2011). Chung, C, Extrusion of Polymers. Theroy and Practice. Hanser. .
[5] Formela, K. and Bogucki, M. (2014). Formela, K, and Bogucki, M. Use of response surface methodology in characterization of properties of recycled high density polyethylene/ground tire rubber compositions. Polimery/Polymers. 59(6):488--494. doi:10.14314/polimery.2014.488
[6] Jarrett, R. (2017). Jarrett, R, Does theory work in practice? two case studies. Quality Engineering. 29(1):141--159. doi:10.1080/08982112.2016.1211894
[7] Kowalski, R., Medina-Meza, I., Thapa, B., Murphy, K., and Ganjyal, G. (2016). Kowalski, R, , Medina-Meza, I., Thapa, B., Murphy, K., and Ganjyal, G. Extrusion processing characteristics of quinoa (chenopodium quinoa willd.) var. cherry vanilla. Journal of Cereal Science. 70:91--98. doi:10.1016/j.jcs.2016.05.024
[8] Lebaal, N., Puissant, S., and Schmidt, F. (2010). Lebaal, N, , Puissant, S., and Schmidt, F. Application of a response surface method to the optimal design of the wall temperature profiles in extrusion die. International Journal of Material Forming. 3(1):47--58. doi:10.1007/s12289-009-0416-x
[9] Seabold, S. and Perktold, J. (2010). Seabold, S, and Perktold, J. Statsmodels: Econometric and statistical modeling with python. In 9th Python in Science Conference. 2010. .
[10] Skogestad, S. and Postlethwaite, I. (2005). Skogestad, S, and Postlethwaite, I. Multivariable feedback control : analysis and design. Wiley, 2 edition. .

  title={{Modeling of a lay-flat plastic hose extrusion process}},
  author={Ellen Nordgård-Hansen, and Schlanbusch, Rune and Sørensen, Thore Jarle},
  journal={Modeling, Identification and Control},
  publisher={Norwegian Society of Automatic Control}