DAI Zhemin, SUN Kun, PANG Zhenfang, HUANG Gongqiang, LAI Zengguang, WANG Jingchao

(Jingdezhen ceramic institute, Jingdezhen 333403, Jiangxi, China)

Abstract: The clay will adhere to the spiral cutter and the inner wall of the cylinder during the extrusion process of the vacuum clay mixer. The movement of clay is dragged by adhesion, causing the clay near the contact surface to move slower than the clay away from the contact surface, and causing defects such as cracks in the extruded clay eventually. In order to solve these problems, bionic body surface electroosmosis method was adopted in this study to reduce the adhesion of clay and contacting wall surface and improve the overall sliding effect of clay. After the electroosmotic device is used on the surface of the cylinder body, the tangential resistance between the wall of the extrusion cylinder and the mud material is reduced, and the ceramic clay velocity and stress distribution have also been improved significantly. In summary, the use of bionic body surface electroosmosis has a significant effect on reducing the viscosity and resistance of clay.

Key words: de-airing pug mill; reduce viscosity and resistance; biomimetic electroosmosis; boundary slippage