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Title: Optimum ejector system design for plastic injection moulds
Authors: Wang, Z. 
Lee, K.S. 
Fuh, J.Y.H. 
Li, Z. 
Zhang, Y.F. 
Nee, A.Y.C. 
Yang, D.C.H. 
Keywords: Balance of ejection force
Ejection force
Injection moulds
Releasing force
Sticking force
Issue Date: 1996
Citation: Wang, Z.,Lee, K.S.,Fuh, J.Y.H.,Li, Z.,Zhang, Y.F.,Nee, A.Y.C.,Yang, D.C.H. (1996). Optimum ejector system design for plastic injection moulds. International Journal of Computer Applications in Technology 9 (4) : 211-218. ScholarBank@NUS Repository.
Abstract: Injection moulding is a technology predominantly used for processing thermoplastic polymers. The injection moulding cycle for thermoplastics consists of several major stages. At the end of the injection cycle the plastic moulded part has to be ejected when the injection mould opens. Since the ejection force from the ejector plate is usually great enough for the required releasing force, mould designers usually neglect the balance of the ejection force which is exerted on the sticking surface. Part deformation or damage might occur due to the unbalance of the ejection force. This paper describes an efficient algorithm for optimizing the arrangement and selection of ejectors. The required releasing/ ejection force should be proportional to the area of the sticking surface. Furthermore, a CAD environment has been developed to facilitate the ejector system design. The processes for optimization and implementation of the algorithm are described in detail and a case study is presented to illustrate the procedure.
Source Title: International Journal of Computer Applications in Technology
ISSN: 09528091
Appears in Collections:Staff Publications

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