Abstract: A high-strength steel sheet of the present invention has a specific chemical composition. Furthermore, in the steel sheet, a degree of Mn segregation in a specific region is 1.5 or less; a maximum P concentration in a specific region is 0.08 mass % or less; in a specific region, at least one specific MnS particle group is present, the number of specific MnS particle groups is 2.0 or fewer per 1 mm2, and the number of specific oxide-based inclusions is 8 or fewer per 1 mm2; of all oxide-based inclusions, oxide-based inclusions having a specific composition are present in a number ratio of 80% or greater; the microstructure includes, in terms of a volume fraction, 30 to 95% martensite, 5 to 70% ferrite phase, less than 30% (and 0% or greater) bainite, and less than 2.0% (and 0% or greater) austenite phase; and a tensile strength is 980 MPa or greater.

Abstract: A working system includes at least one movable apparatus movable and at least one stationary apparatus. The movable apparatus includes a working unit performing a predetermined work. The stationary apparatus includes a control unit performing drive control of the working unit. A control method of the system includes: instructing, when the movable apparatus has reached a working position, the control unit of the stationary apparatus to establish communication with the working unit of the movable apparatus; updating status information indicating a communication establishment status, after the communication instruction; instructing the control unit to transmit an operation signal to the working unit in the working position; instructing the control unit to disconnect the communication, after the signal transmission instruction step; and updating the status information after the disconnection instruction.

Abstract: A three-dimensional printer including a printer head, a target object holding device that rotatably holds the printing target object, a three-dimensional movement supporting device that movably supports the target object holding device, and a control device, where the control device carries out a process of setting a printing target point, which is a position where the ink is to be discharged from a nozzle, an ideal landing point and an actual landing point are calculated in the relevant process, and when positions are shifted between the ideal landing point and the actual landing point, correction corresponding to a shift amount of the position is carried out to set a printing target point.

Abstract: A three-dimensional printer including a printer head, a target object holding device that rotatably holds the printing target object, a three-dimensional movement supporting device that movably supports the target object holding device, and a control device, where the control device carries out a process of setting a printing target point, which is a position where the ink is to be discharged from a nozzle, an ideal landing point and an actual landing point are calculated in the relevant process, and when positions are shifted between the ideal landing point and the actual landing point, correction corresponding to a shift amount of the position is carried out to set a printing target point.

Abstract: A working system includes at least one movable apparatus movable and at least one stationary apparatus. The movable apparatus includes a working unit performing a predetermined work. The stationary apparatus includes a control unit performing drive control of the working unit. A control method of the system includes: instructing, when the movable apparatus has reached a working position, the control unit of the stationary apparatus to establish communication with the working unit of the movable apparatus; updating status information indicating a communication establishment status, after the communication instruction; instructing the control unit to transmit an operation signal to the working unit in the working position; instructing the control unit to disconnect the communication, after the signal transmission instruction step; and updating the status information after the disconnection instruction.

Abstract: An ultraviolet irradiation unit (100) is provided with an ultraviolet irradiation device (50) and an ink mist sucking and removing device (60). The ink mist sucking and removing device (60) includes a blower fan (62), an air filter (63) and a device cover (61) for forming an air flow passage whose one end is provided with a suction port (64) located in an upper vicinity of a printing object (80) and whose another end is provided with a ventilation port (58a) facing an LED drive circuit board (55). Air in the upper vicinity of a printing object (80) is sucked through the suction port (64) by the blower fan (62), ink mist included in the air is removed by the air filter (63), and cleaned air discharged through the ventilation port (58a) is blown to an LED circuit board (51), an LED drive circuit board (55).

Abstract: A 3D inkjet printer includes an inkjet head and a medium holder configured to hold a medium having a three-dimensional shape. A Y-axial driving mechanism is capable of moving the inkjet head along a Y-axial. A Z-axial supporting mechanism supports the medium holder so as to be movable along a Z-axial direction. An X-axial driving mechanism is capable of moving the Z-axial supporting mechanism along an X-axial direction. A Z-axial driving mechanism is capable of moving the medium holder along the Z-axial direction. The medium holder includes an A-axial driving mechanism capable of swinging the medium along an A-axial direction. The A-axial direction is a rotational direction about a shaft disposed along the Y-axial direction. A B-axial driving mechanism is capable of rotating the medium along a B-axial direction. The B-axial direction is a rotational direction about a shaft disposed perpendicular to the Y-axial direction.

Abstract: To reduce unevenness in print density. A controller of a three-dimensional inkjet printer superimposes noise on a control signal which drive controls an A drive motor 46 and B drive motor 46, and based on the control signal on which the noise is superimposed, drives the A axis drive motor 45 and B axis drive motor 46. Because of this, a medium M revolves while fluctuating minutely in an A axis direction and rotates while fluctuating minutely in a B axis direction, so that the landing positions of ink droplets ejected from an inkjet head 20 deviate non-uniformly in a main scanning direction and sub-scanning direction overall. Because of this, the deviation of dot positions becomes visually inconspicuous, and unevenness in print density decreases.

Abstract: To reduce unevenness in print density. A three-dimensional inkjet printer has a medium holding portion 40 which holds a medium M on which a vibration generator 50 which applies vibrations to the medium holding portion 40 is mounted. Then, vibrations are generated from the vibration generator 50 when ink droplets are ejected from an inkjet head 20 by relatively moving the medium holding portion 40 and inkjet head 20 while rotating the medium holding portion 40. Because of this, the medium M held by the medium holding portion 40 vibrates, and the landing positions of ink droplets ejected from the inkjet head 20 deviate non-uniformly overall. Because of this, the deviation of dot positions becomes visually inconspicuous, and unevenness in print density decreases.

Abstract: A printer includes a holding unit, a printer head, a supporting device, a movement controller and a printing controller. The holding unit is configured to hold a print substrate having a surface to be printed. The axes X and Y pass through the print substrate. The movement controller is configured to move the holding unit and the printer head relative to each other in the directions of the axes X, Y and Z which are substantially perpendicular to each other and configured to rotate the holding unit about the axes X and Y relative to the printer head. The printing controller is configured to control ejection of the ink from the printer head according to a relative position of the holding unit and the printer head.

Abstract: An ultraviolet irradiation unit (100) is provided with an ultraviolet irradiation device (50) and an ink mist sucking and removing device (60). The ink mist sucking and removing device (60) includes a blower fan (62), an air filter (63) and a device cover (61) for forming an air flow passage whose one end is provided with a suction port (64) located in an upper vicinity of a printing object (80) and whose another end is provided with a ventilation port (58a) facing an LED drive circuit board (55). Air in the upper vicinity of a printing object (80) is sucked through the suction port (64) by the blower fan (62), ink mist included in the air is removed by the air filter (63), and cleaned air discharged through the ventilation port (58a) is blown to an LED circuit board (51), an LED drive circuit board (55).

Abstract: A 3D inkjet printer includes an inkjet head and a medium holder configured to hold a medium having a three-dimensional shape. A Y-axial driving mechanism is capable of moving the inkjet head along a Y-axial. A Z-axial supporting mechanism supports the medium holder so as to be movable along a Z-axial direction. An X-axial driving mechanism is capable of moving the Z-axial supporting mechanism along an X-axial direction. A Z-axial driving mechanism is capable of moving the medium holder along the Z-axial direction. The medium holder includes an A-axial driving mechanism capable of swinging the medium along an A-axial direction. The A-axial direction is a rotational direction about a shaft disposed along the Y-axial direction. A B-axial driving mechanism is capable of rotating the medium along a B-axial direction. The B-axial direction is a rotational direction about a shaft disposed perpendicular to the Y-axial direction.

Abstract: The present invention relates to a production method, of water glass, comprising dissolving a sodium-based byproduct which is by-produced in the process of enhancing the purity of silicone and not only contains silicon but also contains sodium silicate as a main component, in water to produce crude water glass, at the same time, dissolving the silicon to generate a hydrogen gas, and then filtering the crude water glass to produce water glass. An object of the present invention is to provide a production method of water glass, ensuring that in utilizing, as water glass, a sodium-based byproduct which is by-produced in the process of enhancing the purity of silicon and not only contains silicon but also contains sodium silicate as a main component, the problem of hydrogen gas generation attributable to silicon contained in the byproduct can be solved, a safe and stable operation is possible, and effective utilization as transparent water glass can be achieved.

Abstract: A three-dimensional printer comprises a base 1, a first supporting member 10 supported on the base such that the first supporting member is movable in the direction of an axis X, a second supporting member 15 supported on the first supporting member such that the second supporting member is movable in the direction of an axis Z, a third supporting member 20 supported on the second supporting member such that the third supporting member is rotatable about a first rotation axis Y0 extending in the direction of an axis Y, a holding chuck 26, for holding a print substrate, supported on the third supporting member such that the holding chuck is rotatable about a second rotation axis X0, and a printer head 5 supported on the base 1 to extend above the print substrate 80 such that the printer head is movable in the direction of the axis Y.

Abstract: A printer includes a holding unit, a printer head, a movement controller and a printing controller. The holding unit is configured to hold a print substrate having a surface to be printed. The printer head is configured to eject ink from a plurality of ejection nozzles to the surface. The movement controller is configured to move the holding unit and the printer head relative to each other. The printing controller is configured to control ejection of the ink from the printer head according to a surface curvature of the surface and a relative position of the holding unit and the printer head.

Abstract: A printer includes a holding unit, a printer head, a driving unit, a movement controller and a printing controller. The holding unit is configured to hold a print substrate having a surface to be printed. The driving unit is configured to move at least one of the holding unit and the printer head. The movement controller is configured to control the driving unit to move the holding unit and the printer head relatively so that a distance between the at least one ink nozzle and the surface to be printed is kept at a predetermined distance and so that the ink ejected from the at least one ink nozzle collides with the surface substantially perpendicularly. The printing controller is configured to control ejection of the ink from the printer head according to a distance between the at least one ink nozzle and the surface to be printed.

Abstract: A printer includes a holding unit, a printer head, a supporting device, a movement controller and a printing controller. The holding unit is configured to hold a print substrate having a surface to be printed. The axes X and Y pass through the print substrate. The movement controller is configured to move the holding unit and the printer head relative to each other in the directions of the axes X, Y and Z which are substantially perpendicular to each other and configured to rotate the holding unit about the axes X and Y relative to the printer head. The printing controller is configured to control ejection of the ink from the printer head according to a relative position of the holding unit and the printer head.

Abstract: A printer includes a holding unit, a printer head, a movement controller and a printing controller. The holding unit is configured to hold a print substrate having a surface to be printed. The printer head is configured to eject ink from a plurality of ejection nozzles to the surface. The movement controller is configured to move the holding unit and the printer head relative to each other. The printing controller is configured to control ejection of the ink from the printer head according to a surface curvature of the surface and a relative position of the holding unit and the printer head.

Abstract: A three-dimensional printer comprises a base 1, a first supporting member 10 supported on the base such that the first supporting member is movable in the direction of an axis X, a second supporting member 15 supported on the first supporting member such that the second supporting member is movable in the direction of an axis Z, a third supporting member 20 supported on the second supporting member such that the third supporting member is rotatable about a first rotation axis Y0 extending in the direction of an axis Y, a holding chuck 26, for holding a print substrate, supported on the third supporting member such that the holding chuck is rotatable about a second rotation axis X0, and a printer head 5 supported on the base 1 to extend above the print substrate 80 such that the printer head is movable in the direction of the axis Y.

Abstract: An anechoic chamber has a structure in which a dielectric plate is interposed between an electromagnetic shielding metal plate provided on an interior surface of the chamber and ferrite tiles serving as wave absorbing members, such that the ferrite tiles are located on an interior-side surface of the chamber. Screws serving as metal fittings are secured onto the electromagnetic shielding metal plate, and the dielectric plate is reliably attached to the metal plate by making use of the screws. Alternatively, the dielectric plates are attached to the steel sheet by means of adhesive such that the dimensions of each dielectric plate is made sufficiently smaller than those of a fixed size.