An annular rotating-die technique in extrusion process: effect of mandrel rotating speed on entrance pressure drop and flow properties of molten HDPE

2014 ◽  
Vol 18 (2) ◽  
pp. 241-251 ◽  
Author(s):  
Naret Intawong ◽  
Alongkot Darajang ◽  
Sittichai Udomsom ◽  
Thitipong Yoochooshai ◽  
Chatchawan Kantala
Keyword(s):  
Pressure Drop ◽  
Extrusion Process ◽  
Flow Properties ◽  
Rotating Speed ◽  
Entrance Pressure

Moderation of Entrance Pressure Drop and Extrudate Swelling of Wood Fiber/Polypropylene Composites Melt in Rotating-Die Extrusion Process

2009 ◽  
Vol 79-82 ◽  
pp. 1491-1494 ◽  
Author(s):  
Naret Intawong ◽  
Chatchawan Kantala ◽  
Watit Lotaisong ◽  
Narongrit Sombatsompop
Keyword(s):  
Pressure Drop ◽  
Wood Fiber ◽  
Extrusion Process ◽  
Rotating Speed ◽  
Polypropylene Composites ◽  
Shear Rates ◽  
Swell Ratio ◽  
Die Extrusion ◽  
Wood Content ◽  
Entrance Pressure

A novel rotating-die system was proposed to moderate the elastic swelling for molten polypropylene (PP) and wood/polypropylene (WPP) composite. The results suggested that the neat PP and WPP melts followed the psuedoplastic non-Newtonian pattern. The rotation of the die could moderate the extrusion load and entrance pressure drop. The die rotation effect appeared to be very pronounced for the PP with high wood contents and high extrusion rates. The decreases in extrusion load and entrance pressure drop were related with reductions of melt viscosity due to shear heating effect. The results practically implied that use of the rotating die system could increase the productivity in the extrusion process. In terms of elastic swelling, in all cases, it was found that the swelling ratio of neat PP and WPP melt composite increased with increasing shear rate, but for any given shear rates, the addition of wood particles and the use of rotating die caused decreases in swell ratio of the melts, the wood content being more well-defined than the die rotating speed.

Extensional viscosity from entrance pressure drop measurements

1997 ◽  
Vol 36 (2) ◽  
pp. 144-151 ◽  
Author(s):  
Mahesh Padmanabhan ◽  
Christopher W. Macosko ◽  
M. Padmanabhan
Keyword(s):  
Pressure Drop ◽  
Extensional Viscosity ◽  
Entrance Pressure

AN EXPERIMENTAL AND THEORITICAL STUDY ON THE PRESSURE DROP OF FLUID AT EXTRUSION PROCESS

2015 ◽  
Vol 5 (4) ◽  
pp. 70
Author(s):  
İbrahim Savaş DALMIŞ ◽  
Ümit GÜLER ◽  
Alper KARAKOCA ◽  
Sait Özmen ERUSLU
Keyword(s):  
Pressure Drop ◽  
Extrusion Process

G0600-3-4 Formability and Flow Properties of Thermal Fluid of Wood Powder in Extrusion Process

2010 ◽  
Vol 2010.3 (0) ◽  
pp. 43-44
Author(s):  
Yoshiki KINOMOTO ◽  
Toru SAWAI ◽  
Tomoyuki MINENO ◽  
Takeshi KAJIMOTO ◽  
Tadashi SHIBUE ◽  
...  
Keyword(s):  
Extrusion Process ◽  
Wood Powder ◽  
Flow Properties

Effects of Technical Parameters on Process Stability and Microstructure during Continuous Rheo-Extrusion Process of 6201 Alloy Wire

2012 ◽  
Vol 503-504 ◽  
pp. 219-222 ◽  
Author(s):  
Ren Guo Guan ◽  
Zhan Yong Zhao ◽  
Chao Lian ◽  
Run Ze Chao ◽  
Chun Ming Liu
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Extrusion Process ◽  
Process Stability ◽  
Optimal Process ◽  
Alloy Wire ◽  
Rotating Speed ◽  
Technical Parameters ◽  
Conducting Wire ◽  
Better Than

In this paper, effects of technical parameters on process stability and microstructure during continuous rheo-extrusion process of 6201 alloy wire were investigated. The optimal process parameters for producing 6201 alloy wire are obtained. The casting temperature is from 720°C to 740°C, and the roll rotating speed is 15r/min. The 6201 alloy wire with good performance has been successfully manufactured. After heat treatment, the tensile strength of the product reaches 325 MPa and the resistivity reaches 32.47 nΩm, which is better than LHA2 conducting wire of China.

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