Twin-Screw Extruder and Effective Parameters on the HDPE Extrusion Process
In the process of polyethylene extrusion polymer
material similar to powder or granule is under compression, melting
and transmission operation and on base of special form, extrudate has
been produced. Twin-screw extruders are applicable in industries
because of their high capacity. The powder mixing with chemical
additives and melting with thermal and mechanical energy in three
zones (feed, compression and metering zone) and because of gear
pump and screw's pressure, converting to final product in latest plate.
Extruders with twin-screw and short distance between screws are
better than other types because of their high capacity and good
thermal and mechanical stress.
In this paper, process of polyethylene extrusion and various tapes
of extruders are studied. It is necessary to have an exact control on
process to producing high quality products with safe operation and
optimum energy consumption.
The granule size is depending on granulator motor speed. Results
show at constant feed rate a decrease in granule size was found whit
Increase in motor speed. Relationships between HDPE feed rate and
speed of granulator motor, main motor and gear pump are calculated
following as:
x = HDPE feed flow rate, yM = Main motor speed
yM = (-3.6076e-3) x^4+ (0.24597) x^3+ (-5.49003) x^2+ (64.22092)
x+61.66786 (1)
x = HDPE feed flow rate, yG = Gear pump speed
yG = (-2.4996e-3) x^4+ (0.18018) x^3+ (-4.22794) x^2+ (48.45536)
x+18.78880 (2)
x = HDPE feed flow rate, y = Granulator motor speed
10th Degree Polynomial Fit: y = a+bx+cx^2+dx^3... (3)
a = 1.2751, b = 282.4655, c = -165.2098,
d = 48.3106, e = -8.18715, f = 0.84997
g = -0.056094, h = 0.002358, i = -6.11816e-5
j = 8.919726e-7, k = -5.59050e-9
[1] M. Kostis, Polymer Extrusion Simulation and Die Design: Grand
Challenge and Opportunity, www.kostic.niu.edu/extrusion, 2002.
[2] Chris Rauwendaal, Polymer Extrusion, Fourth Edition, Hanser Gardner
Publisher, 2001.
[3] Prabodh C. Bolur, Extrusion of thermoplastics, technical papers,
http://bolur.plastasia.com, 1998.
[4] N. Sombatsompop, M. Panapoy, Comments on temperature profile of PP
melt in the barrel of twin screw extruder, polymer testing 20, 2001, pp
217-221.
[5] C. Maier, Polym. Eng. Sci. 36, p 1502, 1996.
[6] I. Sbarski, E. Kosior, S.N. Bhattacharya, Int. Polym. Proc. 12, 1997, p
341.
[7] Holton E. Harris, Extrusion Control, Hanser Gardner Publications. 2004.
[1] M. Kostis, Polymer Extrusion Simulation and Die Design: Grand
Challenge and Opportunity, www.kostic.niu.edu/extrusion, 2002.
[2] Chris Rauwendaal, Polymer Extrusion, Fourth Edition, Hanser Gardner
Publisher, 2001.
[3] Prabodh C. Bolur, Extrusion of thermoplastics, technical papers,
http://bolur.plastasia.com, 1998.
[4] N. Sombatsompop, M. Panapoy, Comments on temperature profile of PP
melt in the barrel of twin screw extruder, polymer testing 20, 2001, pp
217-221.
[5] C. Maier, Polym. Eng. Sci. 36, p 1502, 1996.
[6] I. Sbarski, E. Kosior, S.N. Bhattacharya, Int. Polym. Proc. 12, 1997, p
341.
[7] Holton E. Harris, Extrusion Control, Hanser Gardner Publications. 2004.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:60233", author = "S. A. Razavi Alavi and M. Torabi Angaji and Z. Gholami", title = "Twin-Screw Extruder and Effective Parameters on the HDPE Extrusion Process", abstract = "In the process of polyethylene extrusion polymer
material similar to powder or granule is under compression, melting
and transmission operation and on base of special form, extrudate has
been produced. Twin-screw extruders are applicable in industries
because of their high capacity. The powder mixing with chemical
additives and melting with thermal and mechanical energy in three
zones (feed, compression and metering zone) and because of gear
pump and screw's pressure, converting to final product in latest plate.
Extruders with twin-screw and short distance between screws are
better than other types because of their high capacity and good
thermal and mechanical stress.
In this paper, process of polyethylene extrusion and various tapes
of extruders are studied. It is necessary to have an exact control on
process to producing high quality products with safe operation and
optimum energy consumption.
The granule size is depending on granulator motor speed. Results
show at constant feed rate a decrease in granule size was found whit
Increase in motor speed. Relationships between HDPE feed rate and
speed of granulator motor, main motor and gear pump are calculated
following as:
x = HDPE feed flow rate, yM = Main motor speed
yM = (-3.6076e-3) x^4+ (0.24597) x^3+ (-5.49003) x^2+ (64.22092)
x+61.66786 (1)
x = HDPE feed flow rate, yG = Gear pump speed
yG = (-2.4996e-3) x^4+ (0.18018) x^3+ (-4.22794) x^2+ (48.45536)
x+18.78880 (2)
x = HDPE feed flow rate, y = Granulator motor speed
10th Degree Polynomial Fit: y = a+bx+cx^2+dx^3... (3)
a = 1.2751, b = 282.4655, c = -165.2098,
d = 48.3106, e = -8.18715, f = 0.84997
g = -0.056094, h = 0.002358, i = -6.11816e-5
j = 8.919726e-7, k = -5.59050e-9", keywords = "Extrusion, Extruder, Granule, HDPE, Polymer,
Twin-Screw extruder.", volume = "3", number = "1", pages = "60-4", }