scholarly journals Fiber length shortening and fluorescence spectroscopy as characterization method for distributive and dispersive mixing in a co-rotating twin screw extruder

2016 ◽  
Author(s):  
A. Lepschi ◽  
I. Burzic ◽  
L. Sobczak ◽  
J. Miethlinger
Keyword(s):  
Fluorescence Spectroscopy ◽  
Fiber Length ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Dispersive Mixing

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

Effect of Screw Assembly on the Properties of Glass Fiber-Reinforced Nylon-66 Composite

2012 ◽  
Vol 562-564 ◽  
pp. 443-446
Author(s):  
Zhao Yin Jiang ◽  
Ya Dong He ◽  
Chun Ling Xin ◽  
Gang Li
Keyword(s):  
Mechanical Property ◽  
Comparative Analysis ◽  
Glass Fiber ◽  
Fiber Length ◽  
Twin Screw Extruder ◽  
Fiber Reinforced ◽  
Screw Extruder ◽  
Nylon 66 ◽  
Glass Fiber Reinforced ◽  
Twin Screw

The fiber brakeage in compounding glass fiber-reinforced nylon-66 with different screw assemblies of the co-rotating twin screw extruder was studied, and comparative analysis of five different screw assemblies was made. The result shows that proper screw assembly could improve the residual fiber length and the mechanical property of the composite effectively

Numerical Simulation of Mixing Performance of Intermeshing Co-Rotating Tri-Screw and Twin-Screw Extruders

2012 ◽  
Vol 468-471 ◽  
pp. 2211-2214 ◽  
Author(s):  
G. Wang ◽  
X.Z. Zhu ◽  
Chun Yi Sun
Keyword(s):  
Shear Rate ◽  
Polymer Melt ◽  
Polymer Processing ◽  
Mixing Efficiency ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw Extruders ◽  
Mixing Performance ◽  
Twin Screw ◽  
Dispersive Mixing

Parallel arranged tri-screw extruder (PATSE) is a new machine of polymer processing and first manufactured in recent years in China. Compared with the traditional twin-screw extruder, PATSE adds a screw, and added an intermeshing region. It is well known that material going though intermeshing region will acquire higher shear rate and stretching rate, which is beneficial to mixing processing. In order to know the mixing performance in cross-section for PATSE, polymer melt flow field simulation and mixing simulation were conducted on PATSE with 2D model and a Carreau flow model to evaluate velocity profiles, particle trajectories, max shear rate, max stretching rate, dispersive mixing, distributive mixing, segregation scale, length of stretch, mixing efficiency with the commercial CFD package Polyflow and compared with those of twin screw extruder (TSE). The results show that PATSE has better mixing performance than TSE.

Design Parameter to Develop Secondary Flow in Twin Screw Extruder

2014 ◽  
Vol 695 ◽  
pp. 659-662 ◽  
Author(s):  
Shafaat Ahmed Salahudeen ◽  
Abdul Razak Rahmat
Keyword(s):  
Secondary Flow ◽  
Fem Simulation ◽  
Flow Profile ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Screw Length ◽  
Twin Screw ◽  
Superposition Technique ◽  
Dispersive Mixing ◽  
Tip Radius

Possibility of generating strong secondary flow in mixing region of twin screw extruder was analyzed numerical FEM simulation using the commercial CFD package Polyflow. Adaptive remeshing - mesh superposition technique was used to generate high density polyethylene velocity profiles in simulation. Clearance between barrel wall and mixing element was increased gradually and observed the changes in flow pattern. Mixing element tip radius was varied by ratio to generate convergence flow in the clearance region and visualize the strength of secondary flow profile. Strong secondary flow at the clearance channel can generates elongation flow and improves the dispersive mixing; helps to decrease the screw length by minimizing kneading disc number in mixing section.

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