| 摘要 |
The object of this invention is the method of manufacture of a symmetric element of a round ring and cone-shaped ring applicable in serial production. The application area of the invention is particularly the prefabrication of ceramic coating elements, which match together and which are assembled in straight walls, a surface coating containing cylinder rings and cone-shaped rings. Good application objects are for example the cyclones and the ducts of circulating bed boilers, carburetor plants, etc. various combustion chambers and high temperature devices. The concerned elements have special conditions concerning their tightness, so that their seam surfaces must be shaped so that they are profile surfaces differing from plane surfaces, profile surfaces having the capacity to resist to leakage through seam better than straight surfaces.
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