Bone China forming 13

Adhesive bonding is manufacturing CiHu bone, bone China cups and some with attachments vases and jars, unable to organic whole bone porcelain body shall be the working procedure, adhesive is stick their forming parts with good adhesive mud when the adhesive to all parts of water in general and with proper strength, not changeful form, otherwise not after drying and firing due to shrinkage and stick on it have great stress, cracking and even parts to take off the adhesive bonding areas but also pay attention to the correct position, stick after the table is smooth, etc. Adhesive bone porcelain mud and mud can be used when the material or plastic clay slurry, but should be better than soft bone China block, which is harder than bone porcelain glaze, the moisture content should be lower than bone China mud some mud viscosity, or add a small amount of glaze ( 5% ~ 10%) Sponging green after the plastic forming method and the grouting method, its edge in general not too smooth, more show flash phenomenon, with marks of plasma slab will have seam, some bone porcelain products still need to further processing, such as digging bottom, etc. Therefore, all need to step in processing finishing. Fettling is very important in the forming process of the process, its effects on bone porcelain body surface quality, are directly affect the factor of appearance quality of the bone China products, pay enough attention. Fettling has the branch of wet and dry trim. The body formed by dry, dry stripping can be wet line at the same time processing and bonding, in bowls of bone, bone CiHu cup, etc to carry on the processing of bone China products, use wet more, depending on the processing and the degree of its moisture. Need to plastic processing ( Such as punch) And adhesive bone porcelain body, the water can be slightly wet, and 16% ~ 19%. If water is too high after considering the characteristics of easy deformation, but the wet water slightly down and then to trim. Wet method, available scraper, such as foam plastic repair light leveling. For flat bone porcelain products in the need for a lot of processing, can be dried after drying, the bone porcelain body moisture below 2%, the available fettling sponge in water, and use a knife, dry sand paper, screen mesh, etc. Wet note fettling water often want to change, to avoid defects of the new process after. Sponging medium to the forming process of adhesive in the porcelain adopts manual operation, low efficiency, how to make the fettling and adhesive mechanization is the problem to be solved. At home and abroad has quite a few mechanical fettling and bonding machine, but still can't keep up with the development of forming process. With the automatic lathe and bonding machine appear constantly, will make the whole forming process of mechanization automation to a new level. Drying out bone porcelain body of water process called & other; Dry & throughout; 。 By drying, the strength of the body to obtain should transport and fettling adhesive, such as glazing processing requirements, avoid when firing energy loss caused by the water evaporation of water steam and the volume expansion caused by the body damage in the plastic state bone porcelain body strength depends on the billet yield value, through dry processing, bone China body loses plasticity, elasticity and strength. Bone porcelain body moisture content types and their combination of ceramic body is wool stoma object form, according to the moisture content of the combination of features can be divided into chemical combined water, atmospheric adsorption of water and free water three categories. Chemically combined water refers to combine with material in chemical state of water, namely material within the mineral elements of the water, so it is also called water structure, cannot be removed in the drying process. — Tangshan bone China tableware to be continued. 。 。 。 。 。