Flow of polymer melts in a rotary extruder head

Tyabin, N. V.; Bortnikov, V. G.; Tsentovskii, E. M.; Vachagin, K. D.

doi:10.1007/bf00859539

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2005

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“…This technique is mainly employed for the net structures required in geotechnical applications. This single-stage process can result in an increase in the production rate 3 and a reduction in power consumption, 4 and an improved quality of net can be achieved with the rotation of the die as the molecules of polymer align themselves in the direction of flow, thus enhancing the mechanical properties of net structure.…”

Section: Introductionmentioning

confidence: 99%

Expert system for the optimisation of melt extruded net structures

Rawal¹,

Davies²

2005

Plastics, Rubber and Composites

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Net structures were produced by replacing the static die (spinneret) with two concentric dies (consisting of slots) rotating in opposite directions in a melt extrusion process. A series of net structures and filaments were produced from a square die slot shape. Similarly, a series of filaments were produced from the corresponding static square die slot using a laboratory melt extruder. The effect of die rotation on the filament geometries was investigated. Finally, an expert system was developed based on empirical observations and theoretical modelling, which allows the filament cross-sectional area and its shape to be characterised with regard to the die slot dimensions and extrusion parameters. Moreover, the net geometry has also been predicted and visualised using the same expert system.

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Section: Introductionmentioning

confidence: 99%