Thermal optimisation of polymer extrusion using in-process monitoring techniques

Vera-Sorroche, Javier; Kelly, Adrian L.; Brown, Edward A.; Coates, Phil; Karnachi, Nayeem; Harkin‐Jones, Eileen; Li, Kang; Deng, Jiankang

doi:10.1016/j.applthermaleng.2012.04.013

Cited by 64 publications

(43 citation statements)

References 14 publications

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“…Melt temperature variation has been studied in detail at the University of Bradford, England [9][10][11]. Figure 2 shows melt temperatures measured with a wall thermocouple, a thermocouple mesh, and infrared.…”

Section: Melt Temperatures In Extrudersmentioning

confidence: 99%

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Temperature induced dimensional variation in extrusion

Hiesgen¹,

Saul²,

Rauwendaal³

2016

AIP Conference Proceedings

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Die swell as an objective in the design of polymer extrusion dies AIP Conference Proceedings 1769, 140003 (2016) Abstract. Melt temperature variations occur in all polymer extrusion operations using screw extruders. These thermal non-uniformities can result in dimensional variation in the cross section as well as in the extrusion direction. The melt temperature distribution is determined by the viscous dissipation and the conductive heat transfer in the polymer. Conductive heat transfer by necessity requires differences in stock temperatures. Polymers have very low thermal conductivity. As a result, melt temperature non-uniformities in extrusion are often substantial. Temperature differences in the range of 10-30°C are not unusual, especially in large extruders (100-mm diameter or larger).Cross sectional melt temperature variation results in problems like non-uniform wall thickness, ovality, and shape distortion. Axial melt temperature variation results in dimensional variation along the length of the extruded product. One example of such variation is waviness in pipe extrusion; this is a common problem in pipe extrusion operations. This paper will present an analysis of axial dimensional variation caused by temporal melt temperature variation. The analysis will employ an analytical approach to quantify the dimensional variation as well as computer simulation using the software chillWARE ® .

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Section: Melt Temperatures In Extrudersmentioning

confidence: 99%

“…The analysis is employed for a PE100 pipe with an outer diameter of 250-mm and a wall thickness of 24-mm (SDR 1 10.4 is ratio of diameter to wall thickness). The pipe material is a standard PE 100 material.…”

Section: Introductionmentioning

confidence: 99%

Temperature induced dimensional variation in extrusion

Hiesgen¹,

Saul²,

Rauwendaal³

2016

AIP Conference Proceedings

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“…The resulting change in rheological behaviour, however, is not expected to have a significant effect on the interpretation of the data related to screw speed, which is the only relevant related process variable. Table 1 outlines, in addition to composition ratio, other factors known to affect the optimisation of single screw extrusion operations [12][13][14][15] (screw speed; barrel temperature) and were varied as listed. The dependent responses to the selected independent factors include:…”

Section: Two Polypropylenes (Pp)mentioning

confidence: 99%

“…In subsequent studies, Deng et al 12 introduced new real-time energy monitoring methods to investigate how process settings affect energy efficiency and melt consistency. Developed from the initial studies reported by Kelly et al 13 , Vera-Sorroche et al 14,15 measured thermal homogeneity and energy efficiency in extrusion processes, which relate to extruder screw geometry, screw rotation speed and polymer rheological properties.…”

Section: Introductionmentioning

confidence: 99%

Analysis of process parameters related to the single-screw extrusion of recycled polypropylene blends by using design of experiments

Haworth

Mascia

2016

Journal of Plastic Film & Sheeting

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“…[2][3][4][5][6] Screw rotation speed and temperature setting is needed in order to maintain the quality and quantty of the product. Controlling setting barrel temperatures and screw rotation speed directly influences process stability and product quality [7]. The various barrel temperature is the main challenge in the extrusion process [8] for the temperature dstribution in this process influence viscous and swelling of the extrusion output [9].…”

Section: Introductionmentioning

confidence: 99%

The effect of screw rotating speed on mass flow rate, temperature, viscosity, mooney scorch time anddie swell of cold feed rubber blending prepared by qsm 200 extruder machine

Elmiawan

Saryanto

Sebayang

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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The effect of screw rotating speed on mass flow rate, temperature, viscosity, mooney scorch time anddie swell of cold feed rubber blending prepared by qsm 200 extruder machineTo cite this article: P Elmiawan et al 2017 IOP Conf. Ser.: Mater. Sci. Eng. 204 012020 View the article online for updates and enhancements. Related contentThe effects of screw rotation speed on viscosity, mooney scorch time and dieswell of hot-feed blending rubbercompound prefared by gs/w 250 extruder machine A Zohari, H Saryanto and D Sebayang -A comparative study of ground tire rubber devulcanization using twin screw extruder and internal mixer O Ujianto, D B Putri, Jayatin et al. Abstract.The effect of screw rotating speed on cold feed rubber blending production were evaluated. The specimens were prepared by using QSM 200 extruding machine with variable screw rotating speed 4, 6, 8, 10, 12, 16 and 20 RPM. The temperature set in the screw and head of the barrel was around 80 o C by using Temperature Controll Unit (TCU), and was set around 70 o C in zone 1 and 2. Mooney Viscometer was used to evaluate the viscosity and Mooney Scorch Time of cold rubber blending before and after extruding process. In addition, the dynamic rubber process analyzer was used to evaluate the Die Swell of rubber blending after extruding process. The result indicated that the increase of screw rotating speed has a significant effect to increase the flow rate, temperature and the viscosity of the rubber blending. Otherwise, the Mooney Scorch Time (MST) increases due to the decrease of the screw rotating speed. It does not have a significant effect to the die swell of rubber blending.

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Thermal optimisation of polymer extrusion using in-process monitoring techniques

Cited by 64 publications

References 14 publications

Temperature induced dimensional variation in extrusion

Temperature induced dimensional variation in extrusion

Analysis of process parameters related to the single-screw extrusion of recycled polypropylene blends by using design of experiments

The effect of screw rotating speed on mass flow rate, temperature, viscosity, mooney scorch time anddie swell of cold feed rubber blending prepared by qsm 200 extruder machine

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