Mechanism Research on Pelleting Process and Block Self-Healing of Mixture Recycled Plastics in Die-Plate

Abstract:

For many recycled plastics, materials with different rheological properties and melting points are usually mixed together, and can not be separated. For this situation, the block of die-plate holes can be regarded as an important factor that must be taken into consideration in pelleting process. This paper discusses pelleting process in die-plate and reasons of die hole’s blocking. Finite element simulation is calculated to analyze the relationship between operation factors of pelleting process and blocking situation of die holes. Furthermore, block self-healing is realized by changing the velocity of polymer-melt in die-hole.

• Periodical: Applied Mechanics and Materials (Volume 768)
• Pages: 36-44
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.768.36
• Online since: June 2015
• Authors: Yong Gang Zou, Bo Wang, Xiao Feng Liu, Bing Zhang*
• Keywords: Block Self-Healing, Die-Plate, Mixture, Pelleting Process, Recycled Plastic

References

[1] Xiao Feng Liu, Fu Qiao Liu, Bao Hai Yu, Chao Bi, Bing Zhang, Advanced materials Research, Ei. Vol. 557-559 (2012) 2266-2273.

[2] Wei Zhang, Liqun Dong, Jun Zhang, Flow field research of Polymer melt in the granulation die, J. China Bubber/Plastics Technology and Equipment. Vol. 34(2008) 1-4.

[3] Ana S. Abraão, André M. Lemos, Alice Vilela, José M. Sousa, Fernando M. Nunes, Influence of osmotic dehydration process parameters on thequality of candied pumpkins, J. food and bioproducts processing. 91 (2013) 481–494.

DOI: 10.1016/j.fbp.2013.04.006

[4] I. Amalia Kartika, P.Y. Pontalier, L. Rigal, Extraction of sunflower oil by twin-screw extruder: screw configuration and operating condition effects, J. Biore-source Technology. 97 (2005) 2302–2310.

DOI: 10.1016/j.biortech.2005.10.034

[5] María A. Martín-Cabrejas, Yolanda Aguilera, Mercedes M. Pedrosa, The impact of dehydration process on antinutrients and protein digestibility of some legume flours, J. Food Chemistry. 114 (2009) 1063–1068.

DOI: 10.1016/j.foodchem.2008.10.070

[6] D.R. Arda M.R. Mackley, The effect of die exit curvature, die surface roughness and a fluoropolymer additive on sharkskin extrusion instabilities in polyethylene processing, J. Non-Newtonian Fluid Mech. 2005 (126) 47–61.

DOI: 10.1016/j.jnnfm.2004.12.005

[7] William F. Hamilton, Houston, Tex. Pelletizion die plate, P. US. 3599285, (1968).

[8] William F. Hamilton, Houston, Tex. Improved extrusion die plate, P. US. 3847530, (1973).

[9] C.S. Li,C.F. Huang Y.K. Shen, Finite element analysis for phase change problem in polymer processing, J. International Communication in Heat and Mass Transfer. 1995, 22(2)167-177.

DOI: 10.1016/0735-1933(95)00002-x

[10] Chung B.T. F, Qiu. S, Steady state liquid solidification in a tube with viscous dissipation and axial conduction, C. Winter Annual Meeting of the American Society of Mechanical Engineers. New York, ASME. 1992: 23-30.

[11] Yi Zhu, Zhongli Pan, Processing and quality characteristics of apple slices under simultaneous infrared dry-blanching and dehydration with continuous heating, J. Journal of Food Engineering. 2009(90) 441-452.

DOI: 10.1016/j.jfoodeng.2008.07.015

[12] Ling C. Yang,M. Charmchi S.J. Chen, Numerical simulation of semi crystalline polymer flowing in an empty tube with solidification, J. Polymer Engineering and Science, 1 992, 32(11) 724-731.

DOI: 10.1002/pen.760321104

[13] Toshihiro Ohhata, ETC, Die plate for plastics extruder, P. US, 5417907, (1995).

[14] Bing Zhang, Xiaofeng Liu, Chao Bi, Extrusion Uniformity Optimization for Shaping Channel Design in Large-Scale Die-Plate of Underwater Pelletizing C. AppliedMechanics and Materials. 2013, 275-277: 562-566.

DOI: 10.4028/www.scientific.net/amm.275-277.562

[15] Xiaofeng Liu, Fu Qiao Liu, Bao Hai Yu, Chao Bi, Bing Zhang, Pelletization Quality Simulation for Operation Uncertainty of Die-Plate Based on Liquid-Solid-Liquid Coupling Model, C. Advanced Materials Research. 2012, 557-559: 2266-2273.

DOI: 10.4028/www.scientific.net/amr.557-559.2266

[16] P.A. Caton , M.A. Carr, S.S. Kim, M.J. Beautyman, Energy recovery from waste food by combustion or gasification with the potential for regenerative dehydration A case study,J. Energy Conversion and Management. 2010(51)1157-1169.

DOI: 10.1016/j.enconman.2009.12.025

[17] I. Amalia Kartika, P.Y. Pontalier, L. Rigal, Oil extraction of oleic sunflower seeds by twin-screw extruder: influence of screw configuration and operating conditions, J. Industrial Crops and Products. 22 (2005) 207–222.

DOI: 10.1016/j.indcrop.2005.01.001

[18] P. Evon, V. Vandenbossche, P.Y. Pontalier, L. Rigal, Aqueous extraction of resid oil from sunflower press cake using a twin-screw extruder: feasibility study, J. Industrial Crops and Products. 29 (2009) 455–465.

DOI: 10.1016/j.indcrop.2008.09.001

[19] D. Colas, C. Doumeng, P.Y. Pontalier, L, Rigal, Green crop fractionation by twin-screw extrusion: Influence of the screw profile on alfalfa (Medicago sativa) dehydration and protein extraction, J. Chemical Engineering and Processing. 72 (2013).

DOI: 10.1016/j.cep.2013.05.017

[20] C.H. Niu, T. Baylak, D.I. Wilson, Pelletisation of canola meal by extrusion spheronisation for ethanol dehydration, J. Biomass and bioenergy (2014) 1–10.

DOI: 10.1016/j.biombioe.2014.03.035