Abstract: An object is to accurately estimate loss-on-ignition in a short time. A loss-on-ignition estimation apparatus includes at least one processor configured to carry out an estimation step, the estimation step including estimating the loss-on-ignition of foundry sand with use of a learned model constructed by means of machine learning. The learned model is configured to receive, as input, (1) sand weight data relating to a weight of the foundry sand detected in a calcination period and (2) at least one of (i) sand property data relating to one or more properties of the foundry sand, (ii) additive data relating to one or more additives added to the foundry sand, and (iii) calcination environment data relating to a calcination environment detected in the calcination period. The learned model is configured to generate, as output, an estimated loss-on-ignition of the foundry sand.

Abstract: A core inspection device for inspecting a core, the device including a color sensor configured to detect a measured value of each color component of the color of the surface of the core, and a determination unit configured to compare the measured value of at least one color component detected by the color sensor with a threshold prepared corresponding to the at least one color component, thereby determine if a strength property of the core is acceptable or not.

Abstract: A management system includes: a tag given to structures including at least one of a pattern, a molding board, and a molding flask; a storage device; and a control device, wherein the control device is configured to store, in the storage device, collected data and management information being associated with each other, and when a predetermined condition is met in a case where the mold is transferred from a first position to a second position, associate the collected data with management information at the second position based on the information read from the tag, and the predetermined condition is met when the mold having been transferred to the first position along with the structure given the tag is not transferred to the second position along with the structure given the tag, or when the mold is combined with the structure given the tag at the second position.

Abstract: An information display system includes: a display; an input device; a control device connected with the display and the input device; and a database configured to associate and store various parameters measured and calculated in a step of producing a cast, wherein the control device includes a graph display control unit configured to refer to the database and display a graph on the display, and an information display control unit configured to display, in response to acceptance of a user operation, information relevant to parameter included in the various parameters and associated with the display parameter at the data point selected by the user operation, on the display.

Abstract: An analog input device, which converts an inputted analog signal to a digital signal and outputs the digital signal, includes a high resolution AD converter, a first low resolution AD converter, and a second low resolution AD converter. When a difference between a first digital signal converted by the high resolution AD converter and a second digital signal converted by the first low resolution AD converter is equal to or less than a predetermined first threshold, the analog input device outputs first digital signal. When the difference between the first digital signal and the second digital signal is larger than the predetermined first threshold, the analog input device stops an output of the first digital signal.

Abstract: An output control apparatus that controls opening and closing between an output terminal connected to an external apparatus and a power supply terminal to which power for the external apparatus is supplied is provided. The output control apparatus includes a first switching element and a second switching element that are connected in series between the power supply terminal and the output terminal, a data generation portion that generates output data for turning on and off the first switching element and the second switching element based on a control command received from outside, a first controller that controls drive of the first switching element, and a second controller that controls drive of the second switching element.

Abstract: Providing a method for reducing occurrences of a mold shift of a cope and a drag that have been molded by a flaskless molding machine and have been assembled by estimating a cause of a mold shift based on measurements and by taking appropriate measures, and a flaskless molding line that uses the method. The method for reducing occurrences of a mold shift of a cope and a drag (1, 2) that have been molded by a flaskless molding machine (200) and have been assembled comprises a step of measuring specific data at positions where a mold shift may occur during a process for manufacturing or taking out the cope and the drag, and a step of determining if the obtained specific data are within an allowable range.

Abstract: A relay fault diagnosis device includes: at least one C-contact relay that has a common terminal, a normally open terminal and a normally closed terminal; a read-back circuit that is connected to the normally closed terminal of the relay; and a diagnostic section that outputs a test signal to the common terminal to diagnose a fault in the relay.

Abstract: An input module of an industrial control apparatus receives a digital signal from an external source, outputs a binary signal as an internal signal, and determines a level of the digital signal based on the internal signal. The input module determines that the digital signal has a low level when a low level of the internal signal continues for a certain time period, determines that the digital signal has a high level when the internal signal switches from the low level to a high level and then switches to the low level again, and determines an occurrence of a fixing failure when the internal signal switches from the low level to the high level and then fails to switch to the low level again.

Abstract: A rotary electric device includes a stator, and a rotor including a rotor core having magnetic poles and permanent magnets at the magnetic poles. Each of two embedding holes in each magnetic pole includes a loading region in which the permanent magnet is loaded, an inner periphery-side gap, and an outer periphery-side gap. Defining D as the minimum distance from the outer periphery-side gap to an outer peripheral surface of the rotor core, Was the width of a teeth of the stator, H0 as the sum of the magnetomotive forces generated in the portion corresponding to a magnetic pole angle ? in one magnetic pole, and H1 as the magnetomotive force generated in one tooth, the rotor core is formed such that D?W×(H0/H1).

Abstract: An object is to accurately estimate loss-on-ignition in a short time. A loss-on-ignition estimation apparatus includes at least one processor configured to carry out an estimation step, the estimation step including estimating the loss-on-ignition of foundry sand with use of a learned model constructed by means of machine learning. The learned model is configured to receive, as input, (1) sand weight data relating to a weight of the foundry sand detected in a calcination period and (2) at least one of (i) sand property data relating to one or more properties of the foundry sand, (ii) additive data relating to one or more additives added to the foundry sand, and (iii) calcination environment data relating to a calcination environment detected in the calcination period. The learned model is configured to generate, as output, an estimated loss-on-ignition of the foundry sand.

Abstract: An input/output apparatus for a PLC includes at least first and second sub-systems. In each sub-system, a DC-DC converter controls a voltage of an external power supply to a target voltage by switching a PWM signal, and a microcomputer is driven by a clock signal. In the microcomputer, a PWM signal generating unit generates the PWM signal and a frequency analyzing unit samples an inputted voltage at a cycle shorter than a cycle of the PWM signal, and analyzes the frequency of the inputted voltage. The frequency analyzing unit acquires a frequency of the PWM signal from the frequency of the inputted voltage, calculates a frequency of the clock signal, and outputs an abnormality-notifying signal when the frequency of the clock signal falls outside a prescribed range. An output voltage of the DC-DC converter of the first sub-system is inputted to the frequency analyzing unit of the second sub-system.

Abstract: A method is provided for measuring a shift between a carrier for a pattern (a carrier plate) and a flask and preventing a defect caused by a shift in the cavity parts.

Abstract: Providing a method for reducing occurrences of a mold shift of a cope and a drag that have been molded by a flaskless molding machine and have been assembled by estimating a cause of a mold shift based on measurements and by taking appropriate measures, and a flaskless molding line that uses the method. The method for reducing occurrences of a mold shift of a cope and a drag (1, 2) that have been molded by a flaskless molding machine (200) and have been assembled comprises a step of measuring specific data at positions where a mold shift may occur during a process for manufacturing or taking out the cope and the drag, and a step of determining if the obtained specific data are within an allowable range.

Abstract: A core inspection device for inspecting a core, the device including a color sensor configured to detect a measured value of each color component of the color of the surface of the core, and a determination unit configured to compare the measured value of at least one color component detected by the color sensor with a threshold prepared corresponding to the at least one color component, thereby determine if a strength property of the core is acceptable or not.

Abstract: An analog input device, which converts an inputted analog signal to a digital signal and outputs the digital signal, includes a high resolution AD converter, a first low resolution AD converter, and a second low resolution AD converter. When a difference between a first digital signal converted by the high resolution AD converter and a second digital signal converted by the first low resolution AD converter is equal to or less than a predetermined first threshold, the analog input device outputs first digital signal. When the difference between the first digital signal and the second digital signal is larger than the predetermined first threshold, the analog input device stops an output of the first digital signal.

Abstract: A method is provided for measuring a shift between a carrier for a pattern (a carrier plate) and a flask and preventing a defect caused by a shift in the cavity parts.

Abstract: An input module of an industrial control apparatus receives a digital signal from an external source, outputs a binary signal as an internal signal, and determines a level of the digital signal based on the internal signal. The input module determines that the digital signal has a low level when a low level of the internal signal continues for a certain time period, determines that the digital signal has a high level when the internal signal switches from the low level to a high level and then switches to the low level again, and determines an occurrence of a fixing failure when the internal signal switches from the low level to the high level and then fails to switch to the low level again.

Abstract: An output control apparatus that controls opening and closing between an output terminal connected to an external apparatus and a power supply terminal to which power for the external apparatus is supplied is provided. The output control apparatus includes a first switching element and a second switching element that are connected in series between the power supply terminal and the output terminal, a data generation portion that generates output data for turning on and off the first switching element and the second switching element based on a control command received from outside, a first controller that controls drive of the first switching element, and a second controller that controls drive of the second switching element.

Abstract: A rotary electric device includes a stator, and a rotor including a rotor core having magnetic poles and permanent magnets at the magnetic poles. Each of two embedding holes in each magnetic pole includes a loading region in which the permanent magnet is loaded, an inner periphery-side gap, and an outer periphery-side gap. Defining D as the minimum distance from the outer periphery-side gap to an outer peripheral surface of the rotor core, Was the width of a teeth of the stator, H0 as the sum of the magnetomotive forces generated in the portion corresponding to a magnetic pole angle ? in one magnetic pole, and H1 as the magnetomotive force generated in one tooth, the rotor core is formed such that D?W×(H0/H1).