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Calculation of Temperature Distributions during the Solidification Stage in Ceramic Injection Molding
Author(s) -
Zhang Tao,
Evans Julian R. G.
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb04493.x
Subject(s) - biot number , materials science , dimensionless quantity , molding (decorative) , ceramic , thermal diffusivity , composite material , mold , suspension (topology) , heat transfer , heat transfer coefficient , polymer , enthalpy of fusion , thermodynamics , mathematics , melting point , physics , homotopy , pure mathematics
A finite difference procedure for calculating unsteady‐state temperatures in a molded ceramic–polymer suspension during solidification is described. The method incorporates temperature‐dependent thermal diffusivity and enthalpy of fusion of the polymer. An experimental method is used to assess the surface heat transfer coefficient h at the mold wall. It is found that at low injection pressures h varies with time as the molded body shrinks from the wall, but at high injection pressures h can be treated as constant throughout the solidification stage. Using an analytical method, graphical charts are produced for dimensionless temperature as a function of dimensionless time for values of Biot's modulus in the region relevant to ceramic injection molding.