High pressure grouting forming process for ceramic billet

Abstract

The invention belongs to the technical field of ceramic forming, in particular relates to a forming process for a bathroom ceramic billet, which comprises the steps: (1) allocating forming materials according to ratio and mixing the forming materials into even slurry; (2) pressing the slurry into a high strength permeable mold, enabling the pressure of the slurry in the permeable mold to be kept at 0.3-1.6MPa for 0.5-5minutes, and enabling the slurry to crust and form the ceramic billet; (3) discharging the slurry left in the high strength permeable mold; (4) blowing compressed air into the high strength permeable mold, and keeping the pressure of the compressed air in the high strength mold at 0.1-0.25MPa for 0.1-1minute; (5) enabling the inside and the outside of the ceramic billet to form pressure difference of 100-1000Pa by increasing the outside pressure of the high strength permeable mold, keeping the pressure difference at no less than 0.1 second, and enabling the ceramic billet to be separated from the high strength permeable mold; and (6) separating the high strength permeable mold to obtain the ceramic billet. By means of the high pressure grouting forming process for the ceramic billet of the technical scheme, required number of the mold is small, and manufacture efficiency and compact evenness of the billet are high.

Description

technical field [0001] The invention belongs to the technical field of ceramic molding, and in particular relates to a molding process of a sanitary ceramic blank. Background technique [0002] The production process of sanitary ceramics generally includes the following steps. First, prepare slurry, then use the slurry to make blanks, then glaze the blanks, and finally complete the product through the sintering step. [0003] Most of the existing sanitary ceramic blanks are made by grouting molding process. The solid grouting process and the hollow grouting process are selected according to the shape of the sanitary ceramic blanks. Since the solid grouting process has an inner mold and an outer mold at the same time, the two parts of the mold The two inner surfaces can absorb the moisture in the slurry at the same time, so the forming speed is faster. For forming blanks with large openings that can use inner and outer molds or small openings that can be spliced ​​and formed,...

AI Technical Summary

Problems solved by technology

[0006]1, the solid grouting molding process needs to make the inner mold and outer mold at the same time, and the mold cost is relatively high;

[0007]2, Regardless of the solid grouting molding process, hollow grouting molding process or pressure grouting process, simply relying on plaster molds or resin molds to absorb moisture in the slurry Therefore, the molding speed is slow, and it takes at least 2 hours to reach the strength of the demoulding. The low molding speed of the blank makes the company usually need to prepare a large number of molds at the same time, which not only requires a large investment but also occupies a very large area.

[0008]3, Regardless of the solid grouting molding process, hollow grouting molding process or pressure grouting process, the density of the blank obtained is not uniform enough, and the mold usually has good water absorption performance The part corresponding to the blank part is relatively dense, and the part with insufficient water absorption performance corresponds to the part of the blank that is not dense enough. Usually, the part of the blank near the grouting port is relatively dense, and the part of the blank far away from the grouting port is not dense enough; The difference in compactness is very easy to cause irregular deformation of the blank during sintering

[0009]4. The inner mold and the outer mold can be used again after the blank is demoulded each time because the water absorption performance of the mold is reduced. Since the mold cannot be used continuously, As a result, the production efficiency of the blank is low