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Dry Pressing Method of ZTA 25% ZrO2 Zirconia Toughened Alumina Ceramic Lining Plate

ZTA 25% ZrO2 Zirconia Toughened Alumina Ceramic Lining Plate are widely used in industry in recent 5 years. Today let us introduce our dry molding method to you.

 Dry-pressing: ZTA25% ZrO2 Zirconia Toughened AluminaCeramicLining Plate is limited to simple shape and inner wall thickness of more than 1 mm, length and diameter ratio is not greater than 4:1 objects. The forming method is uniaxial or bidirectional. There are two types of press, hydraulic and mechanical, which can be semi-automatic or fully automatic. The maximum pressure of the press is 200Mpa. The output can reach 15~50 pieces per minute. Because the stroke pressure of hydraulic press is uniform, the height of pressing parts is different when powder filling is different. However, the applied pressure  of mechanical press varies with the amount of powder filling, which easily leads to the difference of size shrinkage after sintering and affects the product quality. Therefore, the uniform distribution of powder particles during dry pressing is very important for mold filling. The accuracy of filling quantity has great influence on the dimensional accuracy control of alumina ceramic parts. The maximum free flow effect can be obtained when the powder particles are larger than 60 micron and between 60 and 200 meshes, and the best pressure forming effect can be obtained. 

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