Bone China 12 semi-finished product defects

5, bone porcelain clay wisp of meaning: also known as bone porcelain slurry head, bone porcelain glaze internal surface grouting product billet tumor under loading or strand. Classification of bone porcelain clay, produced in grouting process. The reason: 1) Bone China note too thick, paste viscosity is too large, illiquid. ( 2) Bone China grouting method is undeserved, bone China mud does not stir, stir, uneven flow; Or bone China before injection model of working face are mud drops: pour over a plasma technique inappropriate not spin fell over homogeneous slurry not clean or bone China early formation back pulp model turnover time. ( 3) Bone China gypsum mold surface is stained with mud. To overcome the way: ( 1) According to ensure the moisture content of slurry grouting forming bone porcelain variety, poor liquidity, then choose electrolyte, to increase the liquidity of bone China mud, viscosity is too large can use the glue, before grouting slurry mixture. Stir, try after use. ( 2) Hollow grouting pour out yu slurry, faster, and the action to be flexible, and to turn the model of bone China, pour over plasma clean. The reason: 1) The variety of electrolyte improper selection. Or inadequate or excessive dosage of electrolytes, or with a condensed impurities such as gypsum, sodium sulfate and so on. The bone China mud has a tendency to agglomerate. ( 2) Bone China mud moisture is too high, too fine particles. ( 3) Bone China model too wet, too dry or overheating. Porosity is too low or uneven distribution. ( 4) Bone China mud temperature too low or too high. Grouting workshop at room temperature is too low. Overcoming measures targeted, bone China mud in a 10 - About 22 ℃ temperature 12 ℃, workshop. Bone China free oil dirt before using the new mould. 8, bone China needle meaning: also known as bone porcelain pinhole, bone China air hole, the points caused by grouting forming defects, belongs to the pores, produced in the bone porcelain model system, bone porcelain clay material preparation and grouting process. The reason: 1) Bone China model design structure is unreasonable, hinder bubble discharge, due to the bone China moulding improper operation, cause bone China model and uneven parts bibulous. ( 2) Bone China mud preparation, selection of electrolyte and improper, bone porcelain clay water, less than significant, bone China strong viscosity, liquidity is poor, without stale or for mud put too long, improper safekeeping, bone China mud temperature is too high, made of bone China mud bubbles not easy eduction. ( 3) Grouting process problems, bone China model too, too wet; Or bone China model after working without cooling is used for grouting for model face dust had not cleaned; Slurry mixing, when the foam grouting speed too fast, slurry mixed with air, no enough time to discharge, can cause eye of a needle. To overcome the way: ( 1) In order to make the grouting forming into billet is not eye of a needle, accurate determination of the moisture content of the mud and reduce proportion, selected according to the technological requirements, adjust, control of electrolyte, the dosage is in commonly 0. About 5% increase liquidity. Bone China mud stale and old time at room temperature for at least 3 days, 10 days storage temperature should not be more than 25 ℃. ( 2) Before pouring, check the quality of the bone China gypsum model, moisture content should be between 15%, bone China model impurities and dust in the working face, the model of the drying temperature should be below 60 ℃. ( 3) Grouting, the bone China mud slowly stir well good should not be a noise made vacuum processing, and slow flow or switch to centrifugal injection forming. - - - - - - - - - - - - - - - - - - Bone China custom glass to be continued. 。 。 。 。 。