Bone China forming 9

( 3) Bone porcelain body demoulding difficulty as follows (1) of the cause of body for demoulding difficulty bone China mud moisture content is too high or too wet model (2) in the use of new bone China not well when gypsum mold removal in oil film on the surface of the (3) in bone China mud plasticity clay content such as too much, to go or not appropriate electrolyte (4) bone meal processing is bad, too ca2 ions (5) temperature or working environment temperature is too low, 6 bone China model is too old or demoulding difficulties occurred, again, also can appear when using demoulding difficulty ( 4) Body to generate bad bad or slow body generated or slow reason is as follows (1) inadequate or excessive electrolyte, or bone China has prompted condensation impurity in mud, Such as gypsum, sulfate, etc. ) (2) the bone China mud moisture content is too high, or gypsum mold high water content and water absorption supersaturated 3. Bone meal processing is bad, too ca2 ions (4) bone China mud temperature or ambient temperature is too low, Should be not less than 20 ℃) 。 5. Uneven distribution of pores in the bone China model or low porosity 6 bone porcelain model USES, may surface with soap and water residues ( 5) Bubbles and pinhole of the main causes of bubbles and pinhole as follows (1) model is too dry, too wet, hot or too old (2) the bone porcelain in the mud bubbles or grouting improper operation has not been ruled out, grouting in add starch, encloses the air rushed up a lot of bubbles in the mud (3) bone China model have dry mud, fly ash or burnt dust volatile into bubble, pore, dry mud and surrounding mud material shrinkage is not consistent, forming pinhole (4) bone porcelain model design is unreasonable, gas discharge (hard 6) Soft collapse cause of soft collapse ceramic particles in mud carefully as follows (1), water, electrolyte or not appropriate, appear & other Lizzie & throughout; Phenomenon (2) model of bone China is too wet, or inner surface not net, local don't suck pulp, uniform thickness, partial thin, unable to support, appear soft collapse phenomenon (3) bone China design is bad, the cantilever support at the bottom of the part or side easy soft collapse deformation ( 7) Dirty dirty caused by points is the main reason of the grouting, the model or iron in the mud or other impurities mixed with coloring oxide. Can be molding molding method is the use of bone China mold or tool such as pressure, shear, formed by the movement of external force such as extrusion on plasticity of bone China, processing, forced billet occurred plastic deformation under the external force, made of billet forming method. This bone porcelain blank moisture content is 18% ~ 26%, clay material should have a higher yield value, which make the blank shape of forming stable enough; Also should have bigger extension deformation, to ensure that the blank when the forming cracks. According to the operation method can molding can be divided into throwing, spin, roll, plastic pressure, billet, carving set, etc. , method of plastic forming technology of sludge are demanding. ( 1) Throwing throwing is one of the ancient ceramic forming method, the operator will bone porcelain blank clay on the wheel disk, both hands hold mud, move up and down with the disc rotation, make the sludge water evenly, and make the required size of the sample. Appeared in China in the late dawenkou culture throwing process, to the period of longshan culture has gradually prevailed. It is pure manual operation, need not model, the intensity of labor is big, require skilled operator. This method not only in manufacturing production need and shape the use of less complex, is suitable for the production of small batch, the shape of a simple bone China. Billet drawing not as main means, it is the characteristics of the forming equipment is simple, the disadvantage is that the intensity of labor is big, the size is not accurate, made from dry bone porcelain body also need car repair processing. Bone China body size restrictions, bone China production is not high. Now used as ceramic forming. — Tangshan bone China mugs wholesale to be continued. 。 。 。 。 。