Criteria on feeding system design:: Conventional and sequential injection moulding

Sequential injection moulding technology appeared several years ago in the thermoplastic manufacturing field. Its importance has been increasing since then, and so does the knowledge about the technology. At this moment, it is possible to establish relevant parameters of the process, some of its limitations and design guidelines. This paper pretends to show the advantages of sequential injection moulding, and the importance of the feeding system design, to be able to get all the best of this technology. By means of FEM simulation results on pressure and filling pattern will be compared for both conventional and sequential feeding systems showing the influence on the results, of the appropriate feeding system. (c) 2005 Elsevier B.V. All rights reserved.