The hardness tester for raw molds, rods model 04412A is designed to measure the hardness surfaces of raw molds and rods, as well as to determine the fluidity of molding mixtures according to GOST 23409.17-78 on molding and rod sections, as well as in express laboratories, shop and factory laboratories.
Components of the device and the principle of operation
This device consists of a housing that is designed to assemble all the parts. The indenter, and then the support surface of the sleeve is brought into contact with the test surface of the mold or rod. In this case, the indenter moves relative to the body by an amount determined by the hardness of the surface. With the help of a lever, the movement of the indenter is transmitted to the indicator rod, as a result of this, the arrow turns. After removing the hardness tester from the test surface, the spring returns the indenter to the initial position, while the hardness tester fixes the obtained hardness value. The movement of the indenter by 5 mm corresponds to the rotation of the arrow by 360. From above, the body of the hardness tester is closed with a lid. The readings are reset by pressing the reset button on the indicator. Before starting the measurement, if it is necessary to align the arrow with the zero mark of the scale, turn the upper ring of the indicator.