Effect analysis for compensating viscosity fluctuations by means of a self-optimising injection moulding process
Year: 2015
Type: conference-abstract
Abstract: As the conventional control of the injection moulding process is based on machine variables which cannot compensate process fluctuations, a constant part quality cannot be guaranteed. The aim of the self-optimising processing method is to compensate the effects of process fluctuations, to ensure a repeatable forming of the moulded part and therefore achieve a constant part quality. The so called pvT-optimisation allows, in combination with a closed-loop cavity pressure control, a systematic consideration of variable boundary conditions of the process. In addition, the effort required for setting up the process can be significantly reduced.The pvT-optimised processing method enables the compensation of thermal disturbances and pressure fluctuations. Additionally, the influence of variations in material viscosity on the process variables, caused by the usage of recycled material, is addressed. Changing temperature and pressure of the material during the process compensates for the variations in material viscosity. An effect analyses of the influence of viscosity-relevant process parameters such as melt temperature, mould temperature and injection velocity on quality criteria such as part weight is conducted. The effect analysis shows a strong correlation between injection velocity and the weight. Thus, the part weight can be controlled by adapting the injection velocity.
Source: AIP conference proceedings
DOI: 10.1063/1.4918479
Authors: Ch. Hopmann, M. Weber, A. Reßmann
Institution: RWTH Aachen University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W832635508