2 display bone China defects

( 2) Knead chamber temperature, and turned over to the bone China gypsum after hardening, according to the shape of the concave and convex of the bone porcelain lining, trim appearance, make whole thickness, placed in the drying chamber type dryer, the drying temperature control in the 50 - 60 ℃ range, should not be more than 60 ℃, high temperature strength of model is reduced, and even become crisp scrap, plaster mould (composed of more than Receives or composite mould) Should be set together in the drying process, and tied tightly to prevent deformation and cracking bone China model after drying, awaiting the billet cooling can seal, just out of the dryer for plaster mold uneven distribution of water through the heat, a mould of capillary effect, make water distribution evenly, printed by the bone porcelain body contraction is consistent, in order to prevent deformation and cracking. ( 3) Manual printing to seiko spy, Craft that refer to this chapter printed bone porcelain blank shape & throughout; To overcome the way) 。 ( 4) Sponging the demolition, crack of bone porcelain body to repair. First water wetting of cracking down the bone porcelain body, make its softening, wetting the appropriate scope is big, the appropriate degree of water seepage depth, and then according to the shape of the crack down the use knife to wetting slab carved into, pen to touch water to wound wetting, make its partial moisture content for 16 - 18%, the compression and MianPi reoccupy adhesive layer material moisture content and broadly in line with a wound mud pie filling, pressure glued seams and make smooth. For one-way crack, can use to buy spell pressure method, namely soften wetting of local bone porcelain body, the back is in a state of plastic, with pressure on both sides of the cutting tool from the crack, the bone porcelain body extension effect of composite, and pressure, need some material of bone China body in dry point material after repairing. ( 5) Micro shipment light, stability, vibration against breakage. 2, deformation meaning: bone China products do not accord with the design requirements. Can be divided into to, whole bending and deformation of three. To refer to products placed, the heavy line and plane intersection, Angle is greater than or less than 90 ℃, leaning to around or before and after. The overall bending, namely products a bow bend ( Special plastic) other 。 Local deformation, i. e. , bonding parts irregular distortion. The reason: 1) Modelling design is unreasonable, curve change is big, making models of bone China, split curve towards one side, the bone porcelain of billet weight disparity. ( 2) Raw materials formula, due to the chemical properties change of run of mine ore, melting temperature decreased, and no timely adjust the proportion, burning into the bone China products appear soft and to collapse. ( 3) Bone China printing blank, symmetrical parts not forcibly even, tight pine, receives the thickness of the bone porcelain ware not, no printed according to the principle of the thin under thick, exist in under the weight is light, caused to. Large body, natural suction in the model, model turn to forcibly overweight make bone China body trembled, in the mold was out of shape. ( 4) Release early bone porcelain body form not strength and forced demoulding, not from the part of the mold by the tensile stress of the model, the bone China body deformation. Main body dislocation of adhesive which bone porcelain body shape change. Pinched seal another piece is too wet, fettling premature, adhesive in moisture content on the high side, go fork steak too hard, cause bone porcelain body plasticity deformation or distortion. To overcome the way: ( 1) Bone China products design modelling, get the center of gravity, midperpendicular perpendicular to surface. ( 2) Formula design, should according to the varieties of bone China and porcelain feature choice and analysis of the determination, the physical and chemical raw materials, sample identification, artificial basic formula, then gradually adjust to add and subtract, identified after try many times according to production. — Bone China tableware to be continued. 。 。 。 。 。