Design analysis of a lomolding machine

[摘要] This dissertation describes the design analysis of a lomolder (a machine similar toan injection moulding machine). It focuses on key design aspects that will drivethe purchase cost of the machine and that will also influence the maintenance andoperating cost. The main objective of the study is to provide an understandingof the key factors that influence the cost of a lomolder as well as the factors thatcontributes to a quality manufactured part.A semi-analytical flow model was developed to predict cavity pressure dropsfor a range of part sizes. This model was necessary to eliminate time consumingnumeric simulations required for machine optimisation. Numerous machine conceptdesigns were developed and a final layout design chosen. A parametric CAD modelwas built for the lomolder. Layout designs for different sized lomolders can begenerated with this model. The dissertation concludes with a cost study thatfocuses on the purchase cost of a lomolder unit. Key elements such as choice ofactuator and piston to part area ratio are described.

[发布机构] Stellenbosch University