| 摘要 |
PURPOSE:To improve the dimensional accuracy and durability and realize uniform thickness at casting and easy demolding property by a method wherein coarsely porous gas-liquid circulating means provided between splittable air-tight vessels and filtering medium layers, which are formed by machining a cured and shrunken continuously finely porous rigid synthetic resin block. CONSTITUTION:Each filtering medium layer is formed by machining a fully cured and shrunken continuous finely porous rigid synthetic resin block, which has preferably pore opening of about 0.5-80mum and porosity of about 10-80%. Slurry is charged in a forming space 4. The slurry in the forming space 4 is pressurized by compressed air and at the same time coarsely porous intermediate layers 5 and 5' are communicated to atmospheric pressure or negative pressure source so as to enhance the thickness-building speed of the slurry onto the filtering medium layers 3 and 3' and the diffusing speed of the water in slurry thickness-building part. After the forming of green body, demolding is done by forming water film, which is the residual water in the filtering medium layer 3' oozed out in the interface between the filtering medium layer 3' and the green body by pressurizing the interior of the intermediate layer 5' with the compressed air sent to a water separator on a bottom force 2b side. |
