Bone China forming 1

Bone China ( Bone China) The shape of a wide variety, shape, size is differ, need according to the shape bone China products, and the characteristics of the sludge, select the appropriate methods to take shape. So-called forming is the preparation good billet according to the requirement in all kinds of different shape, size, and process method made with body processes, operational strength is bone China ( Bone China) One of the important process of production. Formed body is only semi-finished products, but also need sponging drying, multi-channel processes such as biscuit firing, glaze to further processing. After forming the body shall meet the following requirements. (1) bone porcelain body should meet the requirements of the product green size is according to the shrinkage rate after feet calculation and determine the dimensions of the forming method of the integrated. (2) the bone porcelain body should have A strength, so that the late adhesive, fettling and handling the operation (3) bone porcelain body structure is compact and uniform, in order to avoid not drying, sintering shrinkage, and cause bone China out of shape, craze, etc. (4) forming process is easy to operation. (5) in the case of guarantee normal demoulding, body contraction as small as possible, to reduce the deformation forming methods bone China ( Bone China) Have the molding, grouting molding, dry pressing forming and isostatic pressing forming and various forming methods. Forming method of the classification of bone porcelain ( Bone China) Different products in the shape of a wide range of USES, bone China products have different shape, size, thickness and so on, for all kinds of bone China products performance and quality requirements are also different, because of forming methods varied also. According to different moisture content, bone China block forming method can be divided into: (1) forming grouting method, bone porcelain blank moisture content 30% ~ 40% (2) the molding method, bone porcelain blank moisture content 18% ~ 26% (3) press forming method, including dry pressing forming, bone porcelain blank moisture content 6% ~ 8% (4) isostatic pressing forming, bone porcelain blank water content 1. 5% ~ 3% ( 1) Grouting forming made mud, bone porcelain blank into a porous model ( Generally for plaster mold) , with the aid of bone in bone China porcelain model make mud water imbibition contact part of the water is absorbed on the surface of the model and the formation of a blank method, requirement of mud grouting forming good liquidity and suspension, and the moisture content is above 30%, but should be on the premise of sufficient demand, reduce the moisture content as much as possible, to reduce the drying time, reduce the drying shrinkage, increase body strength. General component is forming hollow grouting and solid grouting at the two basic methods, after the development, and the pressure grouting and centrifugal grouting reinforcement grouting method. Common grouting forming methods. In the process of grouting, artificially impose external force on slurry, to speed up the process of the grouting, increase the speed of slurry, the bone porcelain body density and strength, according to the method strengthening grouting. Strengthening grouting method such as vacuum grouting and centrifugal grouting pressure and grouting, commonly used is a centrifugal grouting and pressure grouting. Grouting is suitable for manufacturing large thick tyres, thin shell, complex shape irregular bone porcelain products. Its art is simple, but the intensity of labor is big, not easy to realize automation, and the body after sintering the density of small, poor strength, shrinkage, deformation is bigger, the bone porcelain products the appearance of the dimensional accuracy is low, so the performance requirements of a ceramic don't usually adopts the method of production. But with the development of the dispersant, good uniformity high concentration, viscosity of slurry, and strengthen the development of the grouting, grouting forming bone porcelain products performance and quality is improving. — Tangshan bone China mugs to be continued. 。 。 。 。 。