Bone porcelain blank 10

Ceramic ( Bone China) Pug plasticity refers to the clay or after blank with right amount water to mediate, in under the action of external force can obtain arbitrary shape and not crack or rupture occurred, when the external force to stop, still retain the ability to the shape. Plasticity is ceramic ( Bone China) Important process performance of the mud, it directly affect ceramics ( Bone China) The forming and drying process. Demand for plastic bone porcelain blank for is to have good plasticity, so that the shaping and bone porcelain body has enough strength; The second is the directional alignment of particles, not serious, in order to avoid bone porcelain body caused by uneven shrinkage deformation and cracking. Bone China although after filter made of mud cake moisture close to or reached the requirements of plastic clay material, but it contains a lot of gas, and the moisture of filter cake is very uneven, high moisture and central part of the edge part of the moisture content is low, there is even a layered phenomenon, late can't reach to the requirement of molding, need after a pug and stale process. Bone China vacuum pug mill is ceramic ( Bone China) Industry for sludge mixing, kneading practice, mixing and forming one of the important equipment of ceramics ( Bone China) Mud material after vacuum pug mill processing, the material distribution tend to be more uniform, the structure is more close together, plasticity, with appropriate shape size, and be able to produce products of mud. Therefore, vacuum pug mill extrusion of mud quality directly affect the quality of forming bone porcelain body. The pug mill production out of mud swirl marks exist in structure, mud on the section profile of parabola and particle structure defects such as directional arrangement of structure, easy to cause the forming uneven density of bone porcelain body, layered, swirls, distortion, deformation, cracking and other defects, affect the quality of the forming bone porcelain body study shows that the method of plastic forming defects of bone China product is 60% of mud due to the above defects. Bone China vacuum pug for bone China clay material, vacuum degassing and pug is crucial. Vacuum pug is the use of vacuum stirring mixer on bone porcelain clay material processing, take off the bone porcelain clay material in the gas, and makes the process of sludge moisture uniformity. After vacuum pug, the number of air volume in a bone porcelain clay materials can be reduced to 0 from 7% ~ 1%. 5% ~ 1%. Bone China clay material composition is also more uniform, thereby increasing the mud material plasticity and strength, greatly reduced the cracking phenomena of semi-finished products, on the strength of the bone porcelain body after burning light transmittance, will significantly improve. Pug mill control in 9 vacuum degree requirements. 6 ~ 9. 8MP。 Bone China vacuum pug mill is easy to appear problem: (1) vacuum degree is not enough; (2) there are rust; (3) the pug material hardness uneven. Stale after practice of bone porcelain clay coarse material placed in the appropriate temperature and damp environment for a period of time, this process is called stale or stuffy. Its main function is as follows. Bone China (1) by capillary action make the moisture in sludge even, make the clay particles fully hydrated and ion exchange hydrolysis of silicate minerals and water for a long time can happen to a clay material, in order to improve the plasticity of clay. Bone China (2) can increase the content of humic acid substances. By bacteria, decompose organic matter, and organic acids increase the plasticity of bone porcelain clay material, improve the forming performance. Bone China (3) can happen some beneficial REDOX reaction, make FeS2 into H2S, CaSO4 reduction for CaS, and formed by the CO2 and H2O and CaCO3, release H2S. Make plaster to loose even. Bone China & ndash; The bone plate to be continued. 。 。 。 。 。