Bone China forming 11

Dry compacting pressure forming is the bone porcelain blank in the case of low moisture content in bone China mould pressing forming method. Is the water like a few bone porcelain blank in the press at the bottom of the mold, forming by a lever is equipped with upper die pressure. Take vertical loading, the method of horizontal pressure, compared with the plastic forming, has the following advantages: (1) to simplify the production process; (2) expanded the raw material use; (3) bone China bulk density is high, good quality, is advantageous to the rapid drying; (4) forming bone porcelain products shape accuracy, less deformation. Used by dry pressing forming bone porcelain blank need to made of granular powder, in the suppression of large bone porcelain products easy to appear statified phenomenon, is difficult to obtain homogeneous density. Commonly used in simple shapes of lamellar bone porcelain products of the production, the method commonly used bone China industrial production of ceramic tile. Isostatic pressing forming isostatic pressing forming dry pressing forming is improved. It is different from compressive bar forming bone porcelain blank is limited to two surface pressure. Operating in granular blank load elastic bone porcelain mould ( Commonly used rubber or plastic) Seal, and then placed in high pressure vessel with liquid or gas, with the pump to the body or pressurized gas, make the bone China mold evenly by passing by liquid or gas medium pressure and passed to the bone porcelain blank, the blank is compacted into and bone porcelain mould similar body. Isostatic pressing forming advantages lies in its suppression of bone porcelain body density uniform, burnt after bone porcelain product is out of shape not easily. To the isostatic pressing forming bone porcelain blank moisture content 1% ~ 4%, can greatly improve the forming pressure. Additive bone China ( Bone China) Body formula, the bone calcium ion is more, the performance of the slurry are harder to regulate general to join some of the electrolyte to adjust its liquidity, thixotropic mud property, and because almost no plasticity, bone bone China ( Bone China) Content of the clay in body formula is less and less plastic, in some cases to join a small amount of additives to increase the plasticity of the sludge and improving other formability. These additives can generally be divided into two categories: one kind is inorganic additives; Another kind is organic additives commonly used inorganic additives such as alkali powder, sodium silicate, commonly used inorganic additives are shown in table 5 - 2; The commonly used organic additives. Additives in ceramics ( Bone China) The function of forming ceramic ( Bone China) Forming of the application of additive material variety, forming method is different, the kinds and addition amount is different, according to the function of the materials they can be divided into the following categories: (1) binder ( Commonly referred to as the binder) : give bone porcelain blank forming process performance, make the life of the forming has glue strength (2) solution ( Also known as dispersant) : pH control, regulate the electric charge on the surface of the powders, the dispersion of single particle (3) the price of wetting agents: reduce the surface tension, improve invasive (4) lubricants ( Also known as sliding agent) : improve demoulding properties, easy to slip between the child and to improve performance (5) the forming process of plasticizer: fu on rheological property, plasticity and softness 6 colloid protective agent: stable particles, improve the forming performance of 7 water retention agent: prevent pressurized when out of water, such as liquid was to prevent the growth of bacteria when stored in slurry, make the bone China mud performance stability pet-name ruby defoaming agent: prevent liquid powder material in complex stabilizer system generated in the bubble attending: prevent harmful ions, reduce the activity. ⑪ surfactant: is there a glue solution, dispersion, defoaming, the role of wet & ndash; Tangshan bone porcelain hotel tableware to be continued. 。 。 。 。 。