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    In-process monitoring of micromoulding - assessment of process variation.

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    Publication date
    2005
    Author
    Whiteside, Benjamin R.
    Coates, Philip D.
    Martyn, Michael T.
    Keyword
    Micromoulding
    ; Process variation
    ; Polyacetal component processing
    ; Polymer and nano-composite materials
    Peer-Reviewed
    Yes
    
    Metadata
    Show full item record
    Abstract
    Advances in micromoulding technology are leading to complex,net-shape products having sub-milligramme masses with micro-scale surface features in a range of polymer and nano-composite materials.For such small components subjected to the extreme stress,strain-rate and temperature gradients encountered in the micromoulding process,detailed process monitoring is desirable to highlight variations in moulding conditions and assist in creating a viable manufacturing process with acceptable quality products.This paper covers the implementation of a suite of sensors on a commercial micromoulding machine and detailed computer monitoring during processing of a polyacetal component over a range of processing conditions.The results determined that cavity pressure curve integral data provides the most sensitive factor for characterisation of a moulding process of a 0.34 mm~3(0.49 mg)product.The repeatability of the process is directly compared with that of a 15.6mm~3(22.2 mg)product and shown to beinferior.DSC measurements of the whole products indicated little variation in average crystallinity of the products manufactured over a mould temperature range of 30 to 130deg C.
    URI
    http://hdl.handle.net/10454/2890
    Version
    No full-text available in the repository
    Citation
    Whiteside, B.R., Coates, P.D. and Martyn, M.T. (2005). In-process monitoring of micromoulding - assessment of process variation. International Polymer Processing. Vol. 20, No. 2, pp. 162-169.
    Link to publisher’s version
    http://www.polymer-process.com/directlink.asp?IPP1876
    Type
    Article
    Collections
    Engineering and Informatics Publications

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