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Solidification of large section ceramic injection mouldings under low hold pressures

Krug, S; Evans, JRG; Ter Maat, JHH; (2002) Solidification of large section ceramic injection mouldings under low hold pressures. Journal of Materials Science , 37 (13) pp. 2835-2841. 10.1023/A:1015897806699.

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Abstract

Many of the problems of making large ceramic injection mouldings have been identified with solidification in the cavity, particularly with the level of hold pressure applied during cooling. In this work, a wide range of hold pressures (0.1-120 MPa) was used to compensate for thermal contraction of large mouldings. A new pneumatic technique for applying pressure was designed. An insulated sprue was used to prolong solidification of the gate. These techniques provide a combination of high injection pressure during mould filling (95 MPa) with hold pressure control in a range from 0.1-1 MPa during solidification. Large (25 × 45 × 60 mm) mouldings made at these low hold pressures did not have shrinkage-related cracking and the organic vehicle could be safely removed. © 2002 Kluwer Academic Publishers.

Type: Article
Title: Solidification of large section ceramic injection mouldings under low hold pressures
DOI: 10.1023/A:1015897806699
UCL classification: UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Maths and Physical Sciences
URI: http://discovery.ucl.ac.uk/id/eprint/144070
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