Bücherschau

Ohne Zusammenfassung VDI     

VARIOUS METHODS OF TOOLING CONTINUOUS ENAMELING FURNACES1

The importance of adequate firing tools for handling the various shapes which are enameled in continuous furnaces is discussed. The maximum efficiency of a continuous furnace can only be realized when the conveyer chain is equipped with tools which permit uniform loading throughout its entire length with enough ware to utilize fully the heating capacity of the furnace. Materials and principles of design are considered and specific tools and racks suitable for various sheet-iron and cast-iron parts are illustrated.     

THE PHYSICAL PROPERTIES OF THE FINENESS FRACTIONS OF SLAKED SEMIFLINT CLAY1

A select sample of Missouri semiflint clay was slaked to its natural size of grain and screened into the following sizes: on 20, 20 to 40, 40 to 60, 60 to 100, and through 100-mesh. The 100-mesh fraction is a very dense firing clay, giving a high dry and fired modulus of rupture, and would be effective as a “dope” for a weak clay. The properties of the intermediate finenesses are substantially an average of the properties of all the finenesses. Points of inferiority in the coarse fractions are supplemented by points of superiority in the fine fractions, and vice versa. All fractions are therefore desirable, and further, there are indications that no substantial improvement could be made by screening out any one of the fractions.