Bone China forming 10

( 2) Spinning forming is placed with type knife in bone China gypsum model of plasticity in billet formed by extrusion, scraping and shear bone porcelain body method. Spinning forming is a very short moment die forming and the male mold forming two kinds. Bone China gypsum mould cavity die forming concave, bone China mould billet, bone China model wall decided blank shape, type knife decided to internal bone porcelain body shape. Usually for bone porcelain, bone bowls, such as the shape, inner hole deep, diameter larger forming small bone porcelain products. Male mold forming gypsum mould bulge, bone China mold on billet, bone China convex decided to the inner surface of the body of the model, type of knife rotating decided its outer surface. Used for bone porcelain, bone China plate shape of shallow, diameter larger forming bone porcelain products. Spinning forming equipment is simple, but the bone porcelain blank by extrusion, chaos, small bone porcelain body density, moisture content is high, the bone porcelain product easy to deformation. ( 3) Rolling rolling is developed based on the spinning forming a new forming method. This is one of the main forming methods on bone porcelain manufacture every bone porcelain disc shaped billet pieces such as cups, bowls of bone, bone plates, etc all can use. The fixed type knife as a rolling head can rotate throw mud after rolling head and rotate at the same time, the model with the mud material rolled into the shape of the billet. Has advantages of good yield, high efficiency. Rolling also can be divided into the cavity die forming and the male mold forming, also can be divided into hot rolling ( When rolling head work as heating to 110 ~ 120 ℃) And cold rolling ( Rolling head working in room temperature) 。 Rolling the bone porcelain clay material moisture content was 20% 22%, though there are both rolling and sliding, mainly by rolling force. When using this method forming bone porcelain clay material pressure and uniformly, so the deformation is small. Bone China porcelain ( Bone China) Hot rolling production, male mold method is more ideal. ( 4) Plastic moulding plastic forming is short for plastic clay material of cold forming, invented it is bone porcelain clay material is put into the plastic press pressure molding method, first will be made with the plaster mold the shape of the inner cavity is close to, and then pressure clamping, reverse blowing mold release after forming, as shown in figure 5 - 4. Plastic forming is mainly used in hard to use rolling forming oval or other special-shaped products, compared with grouting forming has high production efficiency, low labor intensity, is advantageous for the mechanized production advantages, more and more widely used. ( 5) Printed billet, billet is blank in bone China model using manual extrusion, make its extension and in bone China model of the inner surface contour forming method. Printed billet for the manual mode of production, billet mold for the gypsum manufacture, apply adequate amount of sludge, the pressure within the bone porcelain mold, with a soft leather or flannelette compaction, small can finger hold pressure gradually, make every corner of the plaster mold filling, make again. Other all kinds of irregular shape can print ware. Also can use machine printing billet, the plaster mould external iron mould protection, printed slab method is artificial, unfavorable in mass production. ( 6) Carved with carved by hand cut, Mosaic, bonding, and bone porcelain body method. Generally make handicraft use, low efficiency, high technical requirements of the operator, is not suitable for mass production. — Tangshan bone porcelain cup to be continued. 。 。 。 。 。