EFFECT OF OPERATING CONDITIONS ON THE MIXING PERFORMANCE OF THE SCREW ELEMENT AND THE KNEADING BLOCK IN A TWIN-SCREW EXTRUDER

2007 ◽  
Vol 27 (3) ◽  
Author(s):  
Haibo Yang ◽  
Yuqing Tong ◽  
Ming Tian ◽  
Liqun Zhang
Keyword(s):  
Operating Conditions ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Mixing Performance ◽  
Twin Screw

CFD Simulation of a Co-rotating Twin-screw Extruder: Validation of a Rheological Model for a Starch-Based Dough for Snack Food

2017 ◽  
Vol 14 (2) ◽  
Author(s):  
Giorgia Tagliavini ◽  
Federico Solari ◽  
Roberto Montanari
Keyword(s):  
Cfd Simulation ◽  
Fluid Dynamic ◽  
Operating Conditions ◽  
Second Phase ◽  
Snack Food ◽  
Suitable Model ◽  
Twin Screw Extruder ◽  
Parallel Plates ◽  
Screw Extruder ◽  
Twin Screw

AbstractThe extrusion of starch-based products has been a matter of interest, especially for the pasta and the snack food production. In recent years, twin-screw extruders for snack food have been studied from both structural and fluid dynamics viewpoints. This project started from the rheological characterization of a starch-based dough (corn 34 wt%, tapioca 32 wt%), comparing viscosity values acquired in laboratory with different theoretical models found in literature. A computational fluid dynamic (CFD) simulation recreating the simple case of a fluid flow between two parallel plates was carried out to validate the former comparison. After the rheological validation was completed, the second phase of this work covered a 3D CFD simulation of the first part of the twin-screw extruder (feeding zone). The objective was to find a suitable model for describing the dough rheological behavior and the operating conditions of a co-rotating intermeshing twin-screw extruder. Once the model would be defined, it would allow to investigate several working conditions and different screws geometries of the machine, predicting the evolution of the product rheological properties.

Study of a novel co-rotating non-twin screw extruder in processing flame retardant polymer materials

2017 ◽  
Vol 37 (8) ◽  
pp. 827-835
Author(s):  
Song Zhao ◽  
Baiping Xu ◽  
Liang He ◽  
Huiwen Yu ◽  
Shouzai Tan
Keyword(s):  
Flame Retardant ◽  
Mechanical Performance ◽  
Acrylonitrile Butadiene Styrene ◽  
Operating Conditions ◽  
Polymer Materials ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Limiting Oxygen Index ◽  
Twin Screw ◽  
Halogen Free

Abstract A thorough study was carried out to investigate the priority of a novel co-rotating non-twin screw extruder (NTSE) over a traditional twin screw extruder (TSE) in the mixing process of halogen-free intumescent flame-retardant acrylonitrile-butadiene-styrene (ABS) composites. The homogeneity of the flame-retardant additives of the composites processed by NTSE and TSE under the same operating conditions was characterized by using mechanical performance properties, limiting oxygen index values, UL-94 tests, and thermogravimetric analysis. All the results suggested that NTSE could achieve better mixing of the flame-retardant additives in the polymer matrix than TSE, which was further clarified by the scanning electron microscope pictures.

Extraction of coriander oil by twin-screw extruder: Screw configuration and operating conditions effect

2012 ◽  
Vol 40 ◽  
pp. 355-360 ◽  
Author(s):  
Jazia Sriti ◽  
Kamel Msaada ◽  
Thierry Talou ◽  
Mamadou Faye ◽  
Ika Amalia Kartika ◽  
...  
Keyword(s):  
Operating Conditions ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Extruder Screw ◽  
Twin Screw

scholarly journals Numerical study on mixing performance of glass fiber dispersion in a twin-screw extruder with backward-mixing elements

2015 ◽  
Author(s):  
Kunihiro Hirata ◽  
Hiroshi Ishida ◽  
Motohiro Hiragori ◽  
Yasuya Nakayama ◽  
Toshihisa Kajiwara
Keyword(s):  
Glass Fiber ◽  
Numerical Study ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Fiber Dispersion ◽  
Mixing Performance ◽  
Twin Screw

scholarly journals Evaluation of Dispersive Mixing Performance of Special Rotor Segments in an Intermeshing Co-rotating Twin-Screw Extruder

Seikei-Kakou ◽  
2012 ◽  
Vol 24 (5) ◽  
pp. 279-285
Author(s):  
Sayaka Yamada ◽  
Kazuhisa Fukutani ◽  
Yasuaki Yamane ◽  
Kazuo Yamaguchi
Keyword(s):  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Mixing Performance ◽  
Twin Screw ◽  
Dispersive Mixing

Analytical and Experimental Evaluation of Dispersive Mixing Performance of Special Rotor Segments in a Corotating Twin-Screw Extruder

2016 ◽  
Vol 55 (15) ◽  
pp. 1577-1585 ◽  
Author(s):  
S. Yamada ◽  
K. Fukutani ◽  
K. Yamaguchi ◽  
H. Funahashi ◽  
S. Watanabe ◽  
...  
Keyword(s):  
Experimental Evaluation ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Mixing Performance ◽  
Twin Screw ◽  
Dispersive Mixing

scholarly journals The optimization of Blister Disk geometry for mixing performance in co-rotating twin-screw extruder

2015 ◽  
Author(s):  
Koki Matsumoto ◽  
Natsuki Kayamori ◽  
Tatsuya Tanaka ◽  
Yoshihiko Arao
Keyword(s):  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Mixing Performance ◽  
Twin Screw

Steady and Transient Flow of a Non-Newtonian Chemically Reactive Fluid in a Twin-Screw Extruder

2001 ◽  
Author(s):  
W. Zhu ◽  
Y. Jaluria
Keyword(s):  
Steady State ◽  
Response Time ◽  
Transient Flow ◽  
Transient Behavior ◽  
Operating Conditions ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Calculated Velocity ◽  
Screw Extruders

Abstract The flow of chemically reactive non-Newtonian materials, such as bio-polymers and aciylates, in a fully intermeshing, co-rotating twin-screw extruder is numerically investigated. A detailed study of the system transient behavior is carried out. The main transient aspects, including response time, variation of system variables, and instability of operation, are studied for both single- and twin-screw extruders. The effect of a time-dependent variation in the boundary conditions is studied. The coupling due to conduction heat transfer in the screw barrel is found to be very important and is taken into account for single-screw extruders. In the absence of this conjugate coupling, the response time is much shorter. Several other interesting trends are obtained with respect to the dependence of the transient response on the fluid, materials, and operating conditions. Steady state results are obtained at large time. The calculated velocity distributions in the screw channel are compared with experimental results in the literature for steady state flow and good agreement has been obtained. The numerical results show that not all desired operating conditions are feasible. The calculated results for transient transport agree with the few experimental observations available on this system. These results will be useful in the design, control and optimization of polymer extrusion processes.

Numerical simulation and experimental validation of mixing performance of kneading discs in a twin screw extruder

2009 ◽  
Vol 49 (9) ◽  
pp. 1772-1783 ◽  
Author(s):  
Xian-Ming Zhang ◽  
Lian-Fang Feng ◽  
Wen-Xing Chen ◽  
Guo-Hua Hu
Keyword(s):  
Numerical Simulation ◽  
Experimental Validation ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Mixing Performance ◽  
Twin Screw
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