Bone China forming 16

Defects forming process analysis and control, 1) Bone porcelain ceramic model moisture uneven deformation (1), premature release (2) the bone porcelain mold release when the operator uneven force, deformation caused by improper operation. (3) bone China bad shape design, cantilever parts easy to deformation. (4) electrolyte use is unreasonable, the internal such as mud of uneven thickness, deformation of bone China. ( 2) Bone porcelain cracking bone porcelain cracking is mainly due to the uneven contraction of internal stress or is caused by the external force. (1) bone porcelain parts dry wet plaster model is different, different thickness of blank, partial excessive too suddenly. (2) mud grouting interrupt, again add pulp, cause air bubble, easy cause cracking (3) mud stale time shortage, quality is bad (4) formula is unreasonable, lack of clay or type single 5 6 bone porcelain body mud or model is too cold storage time is too long in the model, the turning point of tensile or pull-apart 7 bone porcelain pug plasticity is bad or have large particles, drying shrinkage is larger cause cracking was bone porcelain pug stale didn't have enough time, or number of pug enough ( 3) Bone China body to generate bad or slow mainly clay material itself and the model and the external environment factors. The main reason is as follows. 1) electrolyte is not appropriate (2) mud water too much, or model is too high (3) temperature, water temperature, workshop temperature is too low (4) bone porcelain ceramic gypsum plaster cast quality is bad (5) model is too old, 4) New model USES the demoulding difficulty (1) bone China, there are some residue, (2) can be resolved with a second after the meal pickling effect is bad, still contains a lot of (3) electrolyte is not appropriate (4) formulation of clay too little or too much, too little clay, shrinkage is too small not easy demoulding; Too much clay, fine particles, easy appear sticky mold phenomenon, demoulding difficulty (5) the model demoulding difficulty occurred ( Except for the new model) , use again, there is still a demoulding difficulty ( 5) Soft collapse main reasons are as follows: (1) mud thixotropy, inappropriate use electrolyte (2) the bone China shape design is unreasonable, mechanical distribution is not reasonable (3) bone porcelain body size is too thin, big injection products, external mode and internal haven't dry to have enough strength, 6) Bubble or pore within the main reason may be as follows (1) bone porcelain mud without vacuum processing, high viscosity in itself, there are air bubbles (2) the grouting process model of bubbles (3) bone porcelain has been rushed too dry, too wet, hot or too old (4) bone porcelain model with fly ash, dried mud scraps (5) bone porcelain model design is unreasonable, poor exhaust, save gas phenomenon ( 7) Spots were main reasons are as follows (1) has the colored impurities such as iron in the mud (2) on the bone China model have impurities. ( 8) Sticky mud during cold rolling sludge sometimes stick to roll, sometimes to the bone China model, main reasons are as follows (1) mud material plastic too good, too much high combination of clay. (2) the sludge moisture content is too big, roll roll head speed too fast (3) head tilt Angle is larger, 9) Flying mud main reasons are as follows (1) inadequate strength of the mud is not straight or (2) the spindle rotational speed is too high (3) roll head pressure fall too slow or the spindle and the rolling speed than not appropriate ( 10) Flower flower heart is bone porcelain body center of chrysanthemum shaped crack defects, the main reasons are as follows (1) roll center more than bone porcelain body too much. (2) roll head center temperature on the high side (3) model of bone China is too dry, can brush a little oil. ( 11) Wrinkling wrinkle is bone porcelain body center or edge with tiny wrinkles, possible reasons are as follows. (1) bone porcelain model dry (2) when the rolling sludge contact with bone China model and faulting and (3) roll forming machine body is too light, vibration phenomenon, or bearing insufficient rigidity of the floor slab, have dithering phenomenon. ( 2) Dao snake ( Take knife) Main reasons are as follows (1) roll head bent wheel design is unreasonable, the holding time is too short, rolling head up too fast. (2) roll head center deviation with the spindle center line installation. (3) fixed bad bone China gypsum model. (4) bone porcelain forming machine body rigidity. — Tangshan bone China water has to be continued. 。 。 。 。 。