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Transactions of the Institute of Measurement and Control
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Cavity pressure control of powder injection moulding machines

Ilhami Yigit

Erciyes University, Yozgat Faculty of Engineering and Architecture, Department of Mechanical Engineering, Yozgat, Turkey, iyigit{at}erciyes.edu.tr

Yücel Ercan

Gazi University, Faculty of Engineering and Architecture, Department of Mechanical Engineering, Ankara, Turkey

Süleyman Saritas

Economics and Technology University, Faculty of Engineering, Department of Mechanical Engineering, Ankara, Turkey

In this study, cavity pressure control of a computer controlled powder injection moulding setup driven by an electro-hydraulic servovalve was investigated both theoretically and experimentally. For this purpose, a detailed system model of a powder injection moulding machine was developed and the important parameters that affect the system behaviour were determined by carrying out computer simulations. In light of the simulation results, a closed-loop control system was designed and manufactured. The control system was implemented to a specially designed powder injection moulding setup. Comparisons of the theoretical and experimental results demonstrate that the developed system model describes the dynamic behaviour of the system satisfactorily. The results of experiments show that accurate control of the cavity pressure can be achieved by the proposed control system.

Key Words: cavity pressure control • electro-hydraulic control • modelling • powder injection moulding

Transactions of the Institute of Measurement and Control, Vol. 26, No. 5, 393-415 (2004)
DOI: 10.1191/0142331204tm129oa
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