Bone China forming 4

Through research, to improve the grouting rate depends mainly on the following points: ( 1) To reduce the resistance of the mud mud resistance depends on its structure, its by the composition of bone China mud, concentration is determined by factors such as the kinds of additive. Bone China plastic raw material content in slurry, solid particles and fine, easy to form a relatively dense bone porcelain body, grouting rate decrease with its permeability. Reason to speed up the absorption slurry, can be appropriately reduce the plastic raw material, the enlargement of mud particle particle, the grouting forming of big bone China products is particularly important. In guarantee under the premise of bone China mud liquid, reduce the moisture in bone China mud, increase the density of plasma absorption rate can be improved. But as a result of bone China mud concentration increase inevitably reduce its liquidity, the requirements to use deflocculation agent ( Diluent) 。 Bone China in slurry deflocculation agent ( Diluent) 。 Can improve its liquidity, but the slurry deflocculation after grouting, the bone porcelain body density high, make the mud resistance increased, instead affects grouting efficiency. If you add a small amount of flocculant in bone China mud, make the formation of bone porcelain body structure is loose, can quickly absorb plasma process. Practice has proved that add a small amount of Ca2 +, magnesium 2 + sulphate or chloride can increase the pulp absorption speed. ( 2) Increasing impetus from the quantitative and knowable slurry process, plasma absorption process of the driving force, is primarily a phalanx of plaster mould capillary suction. Before such as already mentioned, the plaster mould of the size of the capillary force is associated with the penetration rate of bone China gypsum mold, in producing bone China gypsum mold, as the water paste ratio of 78:100 can be obtained when a capillary force of the plaster mould, of course, made of plaster mould process conditions can also affect other plaster mold of the size of the capillary force. Driving force in order to improve the absorption of the plasma process, in addition to bone porcelain casts of capillary force, also can be used to increase bone size and bone China porcelain mud pressure difference between the model methods to achieve, that is used in the production of pressure grouting, such as vacuum grouting and centrifugal method. ( 3) Raise the temperature of mud and bone porcelain model temperature, the viscosity of water drops, mud viscosity and centrifugal grouting method such as low, liquidity increases. Practice has proved that if the temperature is 35 ~ 40 ℃, bone China model temperature about 35 ℃, plasma absorption time can shorten half, demoulding time is also reduced. Forming method of the traditional forming methods common grouting grouting is forming will be liquidity of mud into a porous model, with the aid of bone China water absorption ability of the model will be sucked out the water in the slurry, which formed in the bone China model in blank forming method. Grouting forming a solid and hollow grouting at the two basic methods. In addition, in order to strengthen the grouting process of casting production pressure casting, vacuum casting, centrifugal casting process, such as forming force and centrifugal grouting reinforcement, vacuum grouting grouting method. ( 1) Hollow grouting ( Single grouting) Hollow grouting and grouting, are bone China mud into porous model, when attached to the mold wall mud water loss form when the thickness of the mud up to par, dump out the redundant slurry and the formation of a hollow piece of injection forming method. The technological process is: the solid grouting & rarr; Pour the slurry & rarr; Stripping & rarr; Drilling & rarr; Adhesive & rarr; Dry & rarr; Sponging & rarr; Inspection & rarr; Biscuit firing note in this way the bone porcelain body, because only one side of mud and the model of contact, therefore, bone China body shape is determined by the model of working face, the thickness of the bone porcelain body depends on the residence time of slurry in the model. Grouting forming the bone China products blank thickness is uniform, general vase milk, tea, sugar, cylinder, cylinder and so on all available hollow grouting method to form. To bone China milk cylinder, for example, the forming process of the grouting. — Tangshan bone China cups to be continued. 。 。 。 。 。