Prevention of Occurrence of Internal Bulge in Slip Casting of Large Potteries

  • MORI Ken-ichiro
    Department of Production Systems Engineering, Faculty of Engineering, Toyohashi University of Technology
  • KATADA Yoshito
    Department of Production Systems Engineering, Toyohashi University of Technology
  • UMEDA Manabu
    Technical Research Center, INAX Corporation

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Other Title
  • 大型陶磁器の鋳込み成形における内面盛上りの発生の防止

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Abstract

The mechanism of the formation of an internal bulge appearing as a local increase in wall thickness in the slip casting of large potteries was investigated to prevent occurrence of cracks in dried green bodies. Because it is not easy to observe moisture suction and deposition inside a plaster mold, a simple plate mold was used in the experiment. Moisture suction in the joining region during the casting was enhanced by breaking the alignment of particles due to the collision between the fronts of the slurry; thus, the wall thickness in the joining region increased owing to the acceleration of the growth of deposit. An internal bulge was formed by the difference in the growth of deposits between the joining and peripheral regions. It was found in the slip casting of a model washbasin that the occurrence of internal bulge is prevented by vibrating the plaster mold during the pouring of the slurry.<br>

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