Abstract: A three-dimensional printing device includes a printing tank to accommodate a powder material and including an opening in at least a portion thereof, and an ejector facing the opening of the printing tank to eject a curing liquid to cure the powder material toward the opening. The ejector includes nozzle strings each including nozzles side by side in a first direction. The nozzles each eject the curing liquid and are located in each of the nozzle strings at a density of about 1200 dpi or lower in the first direction. The nozzle strings are spaced away from each other by a distance of about 5 mm or longer in a second direction perpendicular to the first direction.

Abstract: A three-dimensional printing apparatus includes a body, a printing tank, a first table, a feeding tank, a second table, a collecting tank, a third table, a spreader, a support, and a controller. The first table is disposed in the printing tank. The second table is disposed in the feeding tank. The third table is disposed in the collecting tank. The support supports the spreader. After the three-dimensional printing apparatus has finished printing a three-dimensional object, the controller raises the third table and the first table, lowers the second table, and moves the support relative to the body from the downstream side to the upstream side in a scanning direction such that a powder material placed on the third table and the first table is returned to a storage space of the feeding tank by the spreader.

Abstract: A three-dimensional printing device includes a powder supplier that supplies a powder material, a printing tank, a layer former that flattens the powder material, supplied by the powder supplier, in the printing tank, and a powder recovery tank. The layer former moves a layer flattener at least from above the printing tank to above the powder recovery tank while keeping the layer flattener at a predetermined height above the printing tank and the powder recovery tank. The powder recovery tank includes a first cylindrical portion that is opened upward and extends in an up-down direction, a first elevatable table that is accommodated in the first cylindrical portion and is movable up and down in the first cylindrical portion, and a first elevator that supports, and moves up and down, the first elevatable table.

Abstract: The present invention provides a powder for layer manufacturing including non-hydratable matrix particles, and water-soluble adhesive particles. The powder for layer manufacturing includes, as the water-soluble adhesive particles, polyvinyl alcohol resin particles with a saponification degree of 86.5 mol % to 89.0 mol %, an average degree of polymerization of 400 to 600, a viscosity of a 4 mass % aqueous solution at 20° C. of 4.6 mPa to 5.4 mPa, and an average particle diameter of 20 ?m to 60 ?m.

Abstract: A three-dimensional printing data generation device includes a storage storing data of a three-dimensional target object model, a support model generation processor generating, based on the data stored in the storage, data of a three-dimensional support model including a substrate portion located below the target object model and a handle portion extending upward from the substrate portion, the substrate portion including a through-hole larger than a particle diameter of a powder material, and an output processor outputting the data of the target object model and the data of the support model as three-dimensional printing data.

Abstract: A three-dimensional printing apparatus includes a holder, a printing tank, a printing table, line heads, a conveyor, a nozzle checker, and a controller. The printing tank stores a powder material to be placed on the printing table in a printing space of the printing tank. The line heads each include nozzles to discharge a curing liquid onto the powder material on the printing table. The conveyor moves the holder relative to the line heads in a scanning direction. The nozzle checker is disposed in the holder and checks the nozzles for discharge failures. The controller controls discharge of the curing liquid from the nozzles and includes a discharge controller to cause the nozzles to discharge the curing liquid onto the nozzle checker.

Abstract: A three-dimensional printing device includes a layer former that levels off a supplied powder material to form a powder layer including a flat portion having a predetermined height on a printing table, and a supply amount setter that sets an amount of the powder material to be supplied. The supply amount setter sets, as the amount of the powder material to be supplied, an amount smaller than a reference supply amount corresponding to a volume determined as a result of an area size of the printing table being multiplied by the predetermined height. If an amount smaller than the reference supply amount is set as the amount of the powder material to be supplied, the layer former forms the powder layer having the flat portion such that the flat portion has an area size smaller than the area size of the printing table.

Abstract: A three-dimensional printing device includes a receiver structured to receive a curing liquid ejected from nozzles at a receiving surface, and a detector detecting a position, on the receiving surface, of the curing liquid. A controller controls an ejection head such that inspection ejection of ejecting the curing liquid toward the receiver is performed at least before and after a three-dimensional object is printed, and causes the detector to detect a position, on the receiving surface, of the curing liquid in the inspection ejection. The controller determines whether or not each of the plurality of nozzles has an ejection abnormality, based on the position, on the receiving surface, of the curing liquid.

Abstract: A three-dimensional printing apparatus includes a printing table, a line head, a conveyor, an air supplier, and a controller. The line head includes discharge holes disposed in a straight line in a first direction intersecting a scanning direction. The air supplier supplies air to a lower surface of the line head in a second direction intersecting the first direction such that the air is supplied from a rear side to a front side in the scanning direction when the line head moves relative to the printing table while discharging a curing liquid.

Abstract: A three-dimensional printing apparatus includes a holder, a printing tank, a printing table, a line head, a conveyor, and a medium placement stage. The holder holds a three-dimensional object that has been printed. The tank is disposed in the holder and stores a powder material. The table is disposed in a printing space of the tank. The powder material is placed on the table. The line head includes nozzles disposed in a straight line in a right-left direction. The conveyor moves the holder relative to the line head in a scanning direction. The stage is disposed on a portion of the holder downstream of the table in the scanning direction and is parallel or substantially parallel to the table in the right-left direction. A medium to undergo test pattern printing effected by the line head is placed on the stage.

Abstract: A three-dimensional modeling apparatus includes a modeling tank including a modeling space that houses a powder material, a modeling table disposed in the modeling space, the powder material being placed on the modeling table, a powder supplier including a supply port and that supplies the powder material into the modeling tank, a filler that fills the modeling space with the powder material from the powder supplier, a modeling head that discharges a curing liquid to the powder material in the modeling tank, and a conveyor that moves the modeling tank from upstream to downstream relative to the powder supplier, the filler, and the modeling head. The supply port of the powder supplier is disposed upstream of the filler and the modeling head. The filler is disposed upstream of the modeling head.

Abstract: The present invention provides a powder for layer manufacturing including non-hydratable matrix particles, and water-soluble adhesive particles. The powder for layer manufacturing includes, as the water-soluble adhesive particles, polyvinyl alcohol resin particles with a saponification degree of 86.5 mol % to 89.0 mol %, an average degree of polymerization of 400 to 600, a viscosity of a 4 mass % aqueous solution at 20° C. of 4.6 mPa to 5.4 mPa, and an average particle diameter of 20 ?m to 60 ?m.

Abstract: A three-dimensional printing data generation device includes a storage storing data of a three-dimensional target object model, a support model generation processor generating, based on the data stored in the storage, data of a three-dimensional support model including a substrate portion located below the target object model and a handle portion extending upward from the substrate portion, the substrate portion including a through-hole larger than a particle diameter of a powder material, and an output processor outputting the data of the target object model and the data of the support model as three-dimensional printing data.

Abstract: An ink supply system, inkjet printer, and ink loading method are provided. The ink supply system includes an ink head comprising a nozzle; first and second ink containers; a first ink supply passage; a second ink supply passage; an ink amount detecting device configured to detect an amount of ink in the first ink container; and a notifying device to provide a notification when the detected amount of ink is less than or equal to a threshold amount.

Abstract: An ink supply system, inkjet printer, and ink loading method are provided. The ink supply system includes an ink head comprising a nozzle; first and second ink containers; a first ink supply passage; a second ink supply passage; an ink amount detecting device configured to detect an amount of ink in the first ink container; and a notifying device to provide a notification when the detected amount of ink is less than or equal to a threshold amount.

Abstract: An ink supply system, inkjet printer, and ink loading method are provided. The ink supply system includes an ink head comprising a nozzle; first and second ink containers; a first ink supply passage; a second ink supply passage; an ink amount detecting device configured to detect an amount of ink in the first ink container; and a notifying device to provide a notification when the detected amount of ink is less than or equal to a threshold amount.

Abstract: An ink supply system, inkjet printer, and ink loading method are provided. The ink supply system includes an ink head comprising a nozzle; first and second ink containers; a first ink supply passage; a second ink supply passage; an ink amount detecting device configured to detect an amount of ink in the first ink container; and a notifying device to provide a notification when the detected amount of ink is less than or equal to a threshold amount.

Abstract: A liquid jet head has a jetting portion with nozzles for jetting a liquid that is contained in a liquid container. A liquid storing portion is disposed in a conduit that interconnects the liquid storing portion and the jetting portion and that supplies the liquid in a liquid container to the jetting portion through operation of a pump. The liquid storing portion is configured to dampen fluctuations in the pressure in the conduit. A pressure sensor is disposed in the conduit for measuring a pressure in the conduit. The operation of the pump for supplying the liquid in the liquid container to the jetting portion is controlled based on a value of the pressure measured by the pressure measuring means so that the pressure of the liquid supplied from the conduit to the jetting portion is within a predetermined pressure range.

Abstract: An image forming apparatus is presented. The image forming apparatus includes an ink tank configured to store ink, a recording head configured to discharge ink stored in the ink tank onto a recording medium, an adjustment device configured to adjust the flow of ink from the ink tank to the recording head, a damper configured to temporarily store ink that is output from the ink tank to the recording head, an ink condition sensor configured to detect a condition of the ink stored in the damper, and a control device configured to adjust the adjustment device according to the condition detected by the ink condition sensor.

Abstract: A liquid jet recording apparatus adjusts the pressure of liquid jetted from a jetting portion toward a recording medium. The liquid jet recording apparatus has a pressure sensor provided in a tube between a liquid storing portion and a roller tube pump. The pressure of the liquid which flows through the tube is measured, and a pressure value is sent to a control portion. The pressure value is compared with lower limit values and upper limit values stored in a definition file stored in the control portion, and a corresponding drive signal is sent to a drive portion to drive the roller tube pump in a forward or a reverse direction to adjust the pressure of the liquid in the jetting portion.