Display the bone China defect 7

Pressure grouting and dredging slurry pipeline, first check the pulp worse, first far then near progressive opened, full of slowly. Vent started from pulp, the mould has been filled with slurry, with a cork or ooze closed vent, slow switch-off. In order to maintain the appropriate rate of thin under thick after plasma filled with bone China model, bone China mould to form the thin mud, mud is model of upper water and began to decline, repeated grouting operation, the slurry to fill the bone China model. According to the thickness of the bone China products, vacuum pulp, pulp closed time timely put more than pulp. Manual of grouting slurry absorption time, according to the pulp mouth thickness gap or slurry suction light grey mud. Pressure washed pulp slurry closed time, according to the needs of bone China products, thickness and the thickness of the blank forming unit time relationship. Computing needs close time. Manual grouting pour out the remaining pulp, bone China model to gyration slowly turn, make pulp is linear flow, more than pulp filtration after put it gently on the work station. Pressure grouting put slurry be slow, to prevent the residual slurry flow tachycardia caused the upper or the overall collapse deformation. ( 4) Mold release, bone porcelain body within the mold natural dehydration time should be longer, medium body for dehydration time 1 characters. 5 - Large bone porcelain ware during 2 hours, gently, to heavy to turn many times, ensure uniform bone porcelain body dehydration shrinkage deformation. Bone China body to billet mold some clearance. Forcibly demoulding, there will not be too hard and forced demoulding. Big bone porcelain varieties with dry, increase the bone porcelain body strength. Reason: 2, craze meaning: crack grouting bone porcelain ware, mainly caused by uneven shrinkage. ( 1) Each part of the bone China model have different thickness, concave and convex junction, lack of excessive parts or impeded, causing mud into pour out not smooth. Bone China improper model water content too dry, too wet or dry wet not divide evenly, huge difference between upper and lower slice of humidity or new mould surface impurities from the oil not clean. ( 2) Bone China mud formula, inadequate or excessive plastic clay. Particles too thick not stale or stale didn't have enough time, improper or electrolyte choose quantity, poor permeability, 3) Grouting, mud, easy to form containing the air layer, crack is formed in high temperature firing, even take off. Pour more than put too fast, the bone porcelain body are in a plastic state, impacted by external force vibration make the body produces cracked. ( 4) Blank in the bone China model storage time is too long or too early forced demoulding. Excessive drying temperature, drying too quickly. After the billet, slab plate uneven didn't adapt body contraction condition. ( 5) Vent repair improper, holes just orifice and destroys the bone porcelain body structure, bonding, the dry wet ware is differ, glue joint not pressure or uneven force. To overcome the way: ( 1) Before grouting, bone China model, check the presence of defects. Joint line no density, cleaning the bone China model face, must not have dry mud and debris, dust and impurities, and then packed, strapping without slurry leakage crack. Chamber just take out the model must be made via cooling, temperature should be in 20 - model Early between 30 ℃, with moisture content 5 - die 7%, reuse mode is less than 12%, are not allowed to use overheat, too dry and wet bone China model. Temperature 18 - studio 20℃。 15 and slurry temperature It is advisable to 20 ℃. Strapping bone China model appropriate hard, too hard can damage model, the light will slacken burst run pulp. ( 2) Just out of port, make more refined carving works of art should be blind to brush the outlet, people and animal are commonly used features of the orifice instead of air flow ( Preparation of slurry, grouting process, drying see & other; Grouting deformation & throughout; To overcome the way) 。 — Bone porcelain basin that wash a face to be continued. 。 。 。 。 。