High Pressure Casting
High Pressure Casting Process for Sanitary Ware
The casting process varies depending on the slip being used and the article being cast. In general, the following applies for casting of sanitary ware articles using High Pressure Casting technology.
- An already prepared Castimo Porous Resin is pre-filled with liquid clay body slip using a pressure of approx. 3 to 4 bars. Slip temperature should be between 35°C and 43°C.
- After the porous resin mold is filled with the right amount of slip, pressure is increased to approx. 10 to 13 bars.
- Porous Resin acts as a filter material. By applying pressure the water content of the liquid slip is released through the pores of the resin mold. And so solid clay forms on its inside surface. During this process, liquid slip starts to shape into a ceramic clay body.
- When dry, the solid clay body is removed from the porous resin mold. Any defects that show up are revised; i.e. holes and any excess material is being removed, then the surfaces are smoothed with a wet sponge.
- The articles are left for drying until the amount of water is further reduced (pre-drying)
- After pre-drying, the articles are again checked for defects and burnt in the oven.
It is recommended to clean porous resin molds regularly to maintain efficiency at the same time to achieve a long lifetime of the porous resin molds. During the lifespan of a porous resin mold, residues of slip, lime and other particles dry on the resin surface and lead to clogging of the pores. Without the right level of care, clogging of pores and mildew may significantly reduce the durability of a porous resin mold.Castimo offers with CASTIDUR a highly effective cleaning agent for porous resin molds to remove residues of slip and lime and prevents formation of mildew.