Bone China forming 6

(1) the pressure grouting adopts the method of mud pressure increased, to speed up the moisture diffusion, increasing the plasma absorption rate. Compression method in general is to improve the position of hods to increase bone China mud pressure, also can use compressed air to the mud pressure model of the bone porcelain. Practice has proved that using pressure grouting can shorten between plasma absorption, can reduce the bone porcelain body moisture content and drying shrinkage, can improve the density and strength of bone porcelain body (2) the centrifugal centrifugal grouting is the bone China model under the condition of rotating into slurry, the effect of the centrifugal force close to the mould wall form dense bone porcelain body, bone China mud bubbles due to the comparatively light, and in bone China model rotates, more focused on the bursting out, so also can improve the plasma absorption speed and quality information between bone China products, when bone porcelain model when the rotating speed of 1000 r/mn, plasma absorption time can be shortened by 75%, the speed of the general model of bone China often under 500 r/min, the centrifugal grouting machine speed and the size of the bone China products, general is 200 - 22 r / min。 Small particles in centrifugal mud when grouting can focus on the inner surface of the bone China model, and the big particles are concentrated in the bone porcelain body interior, organization make the bone porcelain body easily uneven contraction uneven. Centrifugal forming grouting. (3) group grouting in order to improve the labor productivity, for some simpler shape bone China products, can adopt the method of group casting. Stacked up, this kind of method is to model by a connected into the plasma channel into pulp, again into the bone porcelain model respectively. In order to prevent the channel is not blocked by absorbing mud, within the channel, can be coated with hot mineral oil, a solution containing stearic make its adsorption mud. Many domestic manufacturers of bone porcelain plate, bone porcelain spoon bone China products, such as multiple grouting was formed using group, group grouting combined with pressure grouting, generally after the combination use of pressure grouting. Forming high pressure grouting tank and pressure tank and strengthening grouting way though to the mud pressure, but because of the limit of the strength of gypsum model, the grouting pressure is not high, is still the low pressure grouting. Is the use of high pressure grouting resin mold or high-strength gypsum using high pressure ( Grouting pressure can reach 0. More than 35 mpa) Forming pressure grouting. High pressure grouting forming has the following advantages: (1) use of the space is little; (2) forming speed; (3) more to save energy; (4) improve the operating environment; Special grouting forming ( 1) Thermal plasma is hot paste grouting in the bone porcelain set after the electrode when the mud is full on both ends of the model, connected to alternating current (ac), use a small amount of the electrical conductivity of the electrolyte from the mud to heat the mud, the bone China mud up to 50 ℃ or so can reduce mud viscosity, speed up the absorption slurry. When the mud by 1 ℃ to 5 ℃, bone China mud viscosity can be reduced by 50% ~ 60%, grouting forming speed can be increased by 32% ~ 42%. ( 2) Vacuum grouting with special equipment outside of the plaster mold process of pumping air into vacuum state, or the gypsum mould after reinforcement in the vacuum chamber negative pressure operation, so that can accelerate bone porcelain body formation, vacuum grouting can increase the plaster mould outside differential pressure and mud pressure difference on both sides, which can shorten the body formation time, increase bone porcelain body density and strength, vacuum degree of 300 MMHG ( 1毫米汞柱= 133。 32 pa hereinafter the same) , bone porcelain body formation under half of the time for pressure and vacuum for 500 MMHG, bone China body only formed in the atmosphere of a quarter. Vacuum grouting to comply with the operating conditions, otherwise easy to appear defects. — Tangshan bone porcelain gifts wholesale to be continued. 。 。 。 。 。