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Porous mold

The use of porous formers ia the dippiag process, or porous molds prepared from plaster of Paris or uaglazed porcelaia with a surface pore size smaller than the majority of mbber particles, has been widely adopted ia the latex iadustry. With the porous porcelaia formers, the mbber particles are filtered oa the surface of the formers. The mbber latex coagulates because of its high coaceatratioa to form a film of increa sing thickness as more water is absorbed iato the ceramic. Its rate of iacrease diminishes sharply beyoad an optimum period of time, however, depending on the various characteristics of the ceramic. [Pg.258]

Slip Casting. SHp casting (38,40—42,45,59—62), the process in which a cast is formed from a slurry using a porous mold, is used to form sinks and other sanitary ware, figurines, refractory cmcibles, porous thermal insulation, fine china, and complex shape stmctural ceramics such as multivane rotors. [Pg.309]

Kaysam A process for making rubber articles from rubber latex by flocculating it with a mixed electrolyte and then casting in a rotating, porous mold. [Pg.152]

Porous mold parts Non-porous mold parts... [Pg.611]

A major difference between the two methods is the process by which the liquid is removed from the slurry. In slip casting, the liquid is removed by capillary suction provided by a porous mold. In contrast, the liquid is removed by evaporation in tape casting. In most tape casting processes, the liquid is nonaqueous because the higher volatility allows faster evaporation. [Pg.61]

As shown in Figure 1, the filtrate (liquid) passes through porous media of two types the consolidated layer (the cast) and the porous mold. The flow of liquid through a porous medium is described by Darcy s law which, in one dimension, can be written... [Pg.61]

Fig. 4 Schematic of the slip casting process for a ceramic shape. A slurry of ceramic particles and a carrier fluid is poured into a porous mold. The carrier fluid flows into the pores of the mold, and the ceramic particles remain behind and build up a solid cake in the mold. After the fluid has drained from the part, the cast shape can be removed from the mold. Fig. 4 Schematic of the slip casting process for a ceramic shape. A slurry of ceramic particles and a carrier fluid is poured into a porous mold. The carrier fluid flows into the pores of the mold, and the ceramic particles remain behind and build up a solid cake in the mold. After the fluid has drained from the part, the cast shape can be removed from the mold.
Porous molded monohthic rods were designed as separating media for HPLC and CEC. From this standpoint, the radial and axial homogeneity of the porous structure and quite probably the contraction of rods during polymerization are the questions of primary importance. [Pg.135]


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See also in sourсe #XX -- [ Pg.455 ]




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