Bone China forming 3

Selection of forming method, also look at operating technical level of workers, because the same bone porcelain products can use different methods to forming, such as ceramic disk has a bas-relief, male mold forming can be used, forming grouting method may be adopted. If the volume is larger, enterprise modulation rolling head staff skill level is higher, or forming equipment, bone porcelain pug plasticity is high, the male mold forming can be used to produce; If bone porcelain pug plasticity is poorer, more difficult, or male mold forming solid grouting method is used to production. Which method is appropriate to look at the instance of enterprise technical personnel and equipment, etc. Some forming difficult bone China products completed by experienced worker. Bone forming bone China porcelain grouting grouting process principle of forming bone porcelain forming is the use of the water absorption characteristics of porous mould to complete bone porcelain products forming method. It is generally believed grouting process basically can be divided into three stages. From bone porcelain slurry injection plaster mold suction to form a thin mud for the stage. Bone China is the power of this phase of plaster mould of capillary force, namely in the plaster mould under the action of capillary force began absorbing water, make close to the mould wall mud solute particle in water, soluble in water and less than a micron grade billet particles are drawn into the capillary casts. Because the water is sucked, make the bone China mud particles near each other, by plaster mould to the particle, particle to particle of van der Waals adsorption and close to the mould wall, formed at the beginning of the thin mud. Formed after the thin mud, mud thickening gradually, until the formation of note for the stage, in this stage, the capillary force Shi Jinmo continue absorbing water, thin mud to dehydration, at the same time, the bone porcelain in the mud water spreading thin mud be inhaled through mud plaster mold, the wool stoma its diffusion of moisture concentration difference and pressure difference, bone China mud like a strainer, as mud thickening, moisture diffusion resistance also gradually increased. When required by the mud thickening to note a thickness, the residual slurry poured out, formed the young billet. From the young billet formed after demoulding contraction ejection phase. Because the plaster mould to water and cheeper billet surface water evaporated, the young began to shrink, form green from the model, has the strength after demoulding. Bone China mud grouting process is essentially by capillary suction cast suck up moisture from the mud and thus formed in the mold wall mud, this process has long been known by people, and a lot of research work has been proved that grouting in suction slurry and mud in the filter process, and it is concluded that the thickness of the mud and quantitative relationship is directly proportional to the square root of the time. Many researchers concluded from practice, grouting rate and bone porcelain plaster mold is not a simple proportional relationship between the permeability of. But when a bone is small, the permeability of plaster mould, the increase of permeability plaster mold its corresponding grouting rate increases, when the permeability of plaster mould to a certain value, its corresponding grouting rate reduce instead. When the proportion of water and gypsum powder for ( 70 ~ 80) : 100 into the bone China of plaster mould during suction slurry with large plasma absorption speed, and other water paste made of bone China than casts its plasma absorption speed decreased. Some researchers think that this is due to the mud resistance and bone porcelain resistance change of model results. But through experiment study: paste with different water than made of bone China casts on the same formed by the mud slurry grouting, its permeability change is not big, not with the increase of the permeability of the bone China gypsum mould is reduced, the bone porcelain of different permeability between gypsum mould was presented with a large plasma absorption speed of plaster mould, the main reason is the bone China gypsum mould have big capillary suction, and calculate the different bone China casts of capillary suction is about 0. 026-0. 064MPa。 — Tangshan bone China wholesale to be continued. 。 。 。 。 。