Slip casting
Slip casting
Slip casting molding is actually a molding method that has been used for alumina ceramics for a long time. Because gypsum molds are mainly used, the cost is relatively low and it is also relatively easy to form. Even if the size and shape are complex, it is relatively easy to form.
However, the key to slip castin molding is the manufacturing equipment of alumina slurry. Normally, water is used as the main solvent, and then binders and debonding agents are added, After sufficient grinding, exhaust the gas and then pour it into the gypsum mold. The capillary of the gypsum mold will adsorb water, and the slurry will quickly solidify in the gypsum mold. When conducting hollow grouting, if the mold wall has requirements for the thickness of the adsorbent slurry, the excess slurry needs to be poured out. However, in order to reduce the amount of shrinkage of the blank, We should try to use pulp with higher concentrations as much as possible.
Of course, in the slurry of alumina ceramics, appropriate additives need to be added, mainly to ensure that the particles of the slurry can form a relatively stable suspension on the surface without sinking. In addition, an appropriate amount of other binders such as alginate amine, methyl cellulose, and ethylene glycol, or dispersants such as Arabic gum and polypropylene amine, need to be added, The main purpose is to promote the suitability of the slurry for grouting requirements.
