Device of Electrodes for Measuring Water Content in Foundry Sand, an Apparatus for Measuring Water Content in Foundry Sand, and a Method and an Apparatus for Supplying Water to a Sand Mixer

摘要

This invention relates to a device of electrodes for measuring water content in foundry sand, an apparatus for measuring water content in foundry sand, and a method and an apparatus for supplying water to a sand mixer. When the prior-art device for measuring water content in the foundry sand is disposed in it, the size or shape of the device of the electrodes is limited. ;To solve this problem, the device of the electrodes for measuring water content in the foundry sand by supplying an electric current to it is comprised of a plurality of conductive elements 2, 3 concentrically disposed with certain intervals between them in a longitudinal direction, wherein the elements form an annular shape, a retaining element 4 to retain the plurality of the conductive elements 2, 3, wherein the retaining element 4 has an electrical insulating property and a cylindrical shape having the same diameter as the conductive elements 2, 3, and the two conductive wires 5, 6 to connect alternate respective elements of the plurality of conductive elements 2, 3 so that the conductive elements 2, 3 form two poles, wherein the two conductive wires 5, 6 pass through the cavity in the retaining element 4.