Abstract: A powdery-material feeding device includes a controller configured to selectively conduct constantly keeping-control of constantly keeping rotational speed of a motor, current or voltage applied to the motor without any change as a manipulated variable for a predetermined period, or feedback-control of repetitively obtaining a difference between a discharge flow rate of the powdery material and a target value thereof at predetermined cycles and adjusting by increasing or decreasing the manipulated variable at each of the predetermined cycles in order to reduce the difference, the controller conducts the constantly keeping-control immediately after a motor starts, shifts to the feedback-control when the difference between the discharge flow rate of the powdery material and the target value thereof has an absolute value less than a threshold after the period for the constantly keeping-control elapses, and conducts constantly keeping-control without shifting to the feedback-control when the absolute value of the

Abstract: A powdery-material mixing and feeding system is configured to feed a machine configured to execute a post process with mixed-powdery materials obtained by mixing a first powdery material and a second powdery material discharged from powdery-material feeding devices at a required ratio, wherein when a flow rate of the first powdery material discharged from the first powdery-material feeding device departs from a target value by a predetermined amount or more, a controller increases or decreases the flow rate of the second powdery material discharged from the second powdery-material feeding device such that the ratio of the first powdery material to the second powdery material contained in the mixed-powdery materials is kept within a desired range.

Abstract: A powdery-material measurement device includes a sensor probe configured to receive reflected light from mixed-powdery materials passing adjacent thereto or transmitted light through the mixed-powdery materials to measure characteristics of the mixed-powdery materials while the powdery-material measurement device is in operation to deliver the mixed-powdery materials toward an equipment, and a standard sample having known characteristics and facing the sensor probe that is disposed to receive the reflected light from the standard sample or the transmitted light through the standard sample, when the mixed-powdery materials are not present adjacent the sensor probe while the powdery-material measurement device is in operation to deliver the mixed-powdery materials toward the equipment.

Abstract: A compression-molding system in which upon a start of a molding machine being stopped, a powdery-material feeding device preliminarily supplies a filling device with a predetermined amount of a powdery material while stopping a relative displacement of the filling device and a compression by an upper punch and a lower punch, and the molding machine is subsequently started to cause the relative displacement of the filling device and the compression by the upper punch and the lower punch.

Abstract: A powdery-material mixing degree measurement device includes a supplier configured to be fed with a mixed-powdery materials, a discharger configured to discharge to feed, with the mixed-powdery materials, a filling device configured to fill a die bore of the compression-molding machine with a powdery material, a rotator including a plurality of movable portions and configured to capture the mixed-powdery materials fed through the supplier and to transfer the mixed-powdery materials to the discharger a first sensor configured to measure a mixing degree of the mixed-powdery materials captured by the movable portions of the rotator, a second sensor configured to detect whether or not the mixed-powdery materials in the supplier have an upper surface level kept within a constant target range, and a controller configured to adjust rotational speed of the rotator such that the upper surface level of the mixed-powdery materials in the supplier is kept within the constant target range.

Abstract: A processing system includes a powdery-material feeding device including at least one feeder configured to discharge a reserved powdery material, and an equipment including a filling device configured to be fed with the powdery material discharged from the feeder and configured to execute a post process using the powdery material filled by the filling device, in which upon a start of the equipment having stopped filling with the powdery material by the filling device and executing the post process, when the feeder supplies the filling device with the predetermined amount of the powdery material before the start of the equipment being stopped, the processing system executes tuning of measuring a relation between control input provided to a motor of the feeder and a flow rate of the powdery material discharged from the feeder.

Abstract: A powdery-material feeding device includes a hopper configured to reserve a powdery material, a transfer member configured to deliver and to discharge the powdery material fed from the hopper, a motor configured to drive the transfer member, a measuring instrument configured to measure a discharge amount of a powdery material delivered to be discharged by the transfer member, and a controller configured to control, while control according to the discharge amount of the powdery material measured by the measuring instrument is not conducted, a current applied to a coil of the motor to have a substantially constant amount, to control the discharge amount of the powdery material delivered to be discharged by the transfer member to have a required amount.

Abstract: A controller is configured to adjust, by increasing or decreasing an amount of a lubricant mixed with the powdery material, an amount of a lubricant applied to an inner circumference of a die bore and tips, or a time to mix the lubricant to be mixed with the powdery material and the powdery material, in accordance with whether or not the molded product has defectiveness, a pressure applied to the lower punch pushing the molded product out of the die bore, a temperature of the die bore, the upper punch, or the lower punch, a temperature of the powdery material, or a humidity of the powdery material.

Abstract: A compression-molding system in which upon a start of a molding machine being stopped, a powdery-material feeding device preliminarily supplies a filling device with a predetermined amount of a powdery material while stopping a relative displacement of the filling device and a compression by an upper punch and a lower punch, and the molding machine is subsequently started to cause the relative displacement of the filling device and the compression by the upper punch and the lower punch.

Abstract: A controller is configured to adjust, by increasing or decreasing an amount of a lubricant mixed with the powdery material, an amount of a lubricant applied to an inner circumference of a die bore and tips, or a time to mix the lubricant to be mixed with the powdery material and the powdery material, in accordance with whether or not the molded product has defectiveness, a pressure applied to the lower punch pushing the molded product out of the die bore, a temperature of the die bore, the upper punch, or the lower punch, a temperature of the powdery material, or a humidity of the powdery material.

Abstract: A powdery-material feeding device includes a hopper configured to reserve a powdery material, a transfer member configured to deliver and to discharge the powdery material fed from the hopper, a motor configured to drive the transfer member, a measuring instrument configured to measure a discharge amount of a powdery material delivered to be discharged by the transfer member, and a controller configured to control, while control according to the discharge amount of the powdery material measured by the measuring instrument is not conducted, a current applied to a coil of the motor to have a substantially constant amount, to control the discharge amount of the powdery material delivered to be discharged by the transfer member to have a required amount.

Abstract: A current sensor includes: a U-shaped core as a magnetic body; a conductor inserted into a slit of the core; and a detection element arranged in the slit of the core and detecting a magnetic field, wherein the core includes recessed portions on both side surfaces facing the detection element and the recessed portions have wall portions intersecting with at least an insertion direction of the conductor.

Abstract: A rotation angle detecting device includes: a magnet member placed in a shaft member to face a magneto-electric conversion element and detecting a rotation angle of the shaft member in response to a relative rotation of the magnet member with respect to the magneto-electric conversion element, wherein the magnet member has a magnet where a groove formed in a rectangular parallelepiped body having maximum surfaces orthogonal to an axis of the shaft member is formed to be open to one maximum surface side of the rectangular parallelepiped body and extend in parallel to a short-side lateral surface of the rectangular parallelepiped body, and is magnetized along the groove with respect to the magnet.

Abstract: A rotation angle detecting device includes: a magnet member placed in a shaft member to face a magneto-electric conversion element and detecting a rotation angle of the shaft member in response to a relative rotation of the magnet member with respect to the magneto-electric conversion element, wherein the magnet member has a magnet where a groove formed in a rectangular parallelepiped body having maximum surfaces orthogonal to an axis of the shaft member is formed to be open to one maximum surface side of the rectangular parallelepiped body and extend in parallel to a short-side lateral surface of the rectangular parallelepiped body, and is magnetized along the groove with respect to the magnet.

Abstract: A current sensor includes: a U-shaped core as a magnetic body; a conductor inserted into a slit of the core; and a detection element arranged in the slit of the core and detecting a magnetic field, wherein the core includes recessed portions on both side surfaces facing the detection element and the recessed portions have wall portions intersecting with at least an insertion direction of the conductor.