METHOD FOR DETERMINING AND EVALUATING THE THERMAL STRENGTH OF CORE OR MOLDING SANDS AND A COMPLEX FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC G01N3/60 

FIELD: foundry engineering.

SUBSTANCE: inventions relate to the field of foundry engineering and are intended to facilitate comparison tests for the thermal strength of molding or core sands in the metal-mold interaction system. The complex contains a heating device having a housing with a thermal sensor and a heating element installed in it, a programmable device that controls the heating device, a sample placed on two supports inside the housing of the heating device, while the housing of the heating device is located in the center of the sample, and a sensor that records the time of destruction and the temperature of destruction and transmits data to the programmable device. The heating device, the sensor and the programmable device are connected to the power source by means of an electrical connection, and the complex is additionally equipped with a weight designed for loading the sample. On the upper and lower surface of the sample along its transverse axis of symmetry, two U-shaped grooves are made in the form of a sine wave, with a depth ranging from 2 mm to 5 mm and a width ranging from 2 mm to 5 mm. The essence of the method: the sample is placed on two supports in a complex to determine the thermal strength of core and molding sands, the sample is heated in an automatic cycle to a temperature that should be at least 300°C, the time of destruction and the temperature of destruction are fixed, the thermal strength index is determined by the formula, the introduction of statistically determined thermal strength indicators of molding or core sands and their component composition specified technologically, comparison of the heat resistance index calculated according to the formula with the heat resistance indicators set technologically and entered into the programmable device, correction of the component composition of the molding or core sands of which the sample consists.

EFFECT: determination of the thermal strength index with a high degree of accuracy and the possibility of implementing adjustments to the component composition of molding (core) sands.

19 cl, 2 dwg