Ceramic ball forming method
1. Plastic extrusion
The plastic extrusion molding method is based on the size of the grinding ball, extruding the mud stick through a vacuum mud trainer, cutting the mud stick into corresponding size mud segments, using mechanical operation or manual methods to rub the small mud segments into balls, and After drying and drainage, raw embryos were obtained.
?This production technology has a small investment scale and simple equipment. It is mainly used for molding clay or subaluminum spherules. The spherules have a large particle size and poor sphericity. Eliminated.
?2.Isostatic pressing method
?Isostatic pressing is divided into wet isostatic pressing and dry isostatic pressing.
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?In wet isostatic pressing, the powder is first filled in a soft mold with a spherical cavity. The soft mold is sealed and placed in the working cylinder of a cold isostatic press. The soft mold and powder are then passed through an ultrahigh pressure liquid medium. The material is uniformly compressed. After the pressure is released, the soft mold and the embryo body are taken out, and the spherical embryo body is obtained by demolding outside the working cylinder. This molding method does not require high powder, and the embryo body has a high density and uniformity. The disadvantages are large equipment investment, long production cycle, manual mold release, and low degree of automation.
?Dry isostatic pressing is a more advanced forming method, which is easy to realize automation. The shape and appearance of the embryo body are better than wet isostatic pressing.
?3.Roll forming method
?The roll forming method is a semi-dry and wet forming method that draws on the production process of Chinese medicine pills or forming dumplings. It wets the core by spraying liquid, and the dry powder added on the outside of the wet core is rolled and dense Three-step cycle forming.?
The molding process equipment is simple, can realize automatic operation, and has a high efficiency in producing small-diameter porcelain balls.