JP6828267B2 - Equipment for modeling 3D objects, programs, methods for modeling 3D objects, methods for creating modeling data for 3D objects - Google Patents

Description

The present invention relates to an apparatus for modeling a three-dimensional object, a program, a method for modeling a three-dimensional object, and a method for creating modeling data for a three-dimensional object.

As a device for modeling a three-dimensional model (three-dimensional model), for example, there is a device that models by a powder lamination molding method. This is done, for example, by spreading powder on a modeling stage, flattening it, and applying a modeling liquid that binds the powder to the flattened layered powder (this is called a "powder layer"). A layered model (this is referred to as a "model layer") to which powders are bonded is formed. Then, the powder layer is formed on the modeling layer, and the operation of forming the modeling layer is repeated again, and the modeling layer is laminated to form a three-dimensional model.

Conventionally, in a modeling method using a photocurable resin, a method of controlling surface roughness by controlling the mixing ratio of a model material and a support material or the amount of light energy is known (Patent Document 1).

JP 2015-139957

By the way, in the powder laminated molding method, since the molding liquid is applied to the thinned powder layer to bond the powder, the powder is likely to scatter, and the liquid cross-linking force of the molding liquid causes the powder to scatter. Aggregation progresses remarkably.

Therefore, there is a problem that the unevenness of the surface of the three-dimensional model becomes large, the surface roughness becomes rough, and the accuracy also decreases.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the molding quality.

In order to solve the above problems, the device for modeling the three-dimensional model according to the present invention is
A modeling liquid applying means for forming a layered model by applying a modeling liquid for binding the powder to the spread powder, and
A means for controlling the formation of a three-dimensional model in which the layered model is laminated by repeating the operation of spreading the powder and the operation of applying the modeling liquid from the modeling liquid applying means to form the layered model. And with
The means for controlling the above
When modeling the layered model , the modeling liquid application means is applied a plurality of times for a region forming at least one of an inclined surface of the three-dimensional model, a side wall surface of a cylinder, an inner wall surface of a circular hole, and a wall surface of a slit. The structure is such that scanning is performed to apply the same modeling liquid a plurality of times to one pixel so that a part thereof overlaps on the powder.

According to the present invention, the molding quality can be improved.

It is a plane explanatory view of the apparatus which concerns on 1st Embodiment of this invention. It is also a side explanatory view. It is also the cross-sectional explanatory view of the modeling part. It is a block diagram which provides the outline | description of the control part of this apparatus. It is a schematic explanatory drawing used for the explanation of the flow of modeling. It is explanatory drawing which provides the explanation of the discharge result of the modeling liquid in 1st Embodiment of this invention. It is explanatory drawing which provides the explanation of the discharge result of the modeling liquid in Comparative Example 1. FIG. It is explanatory drawing which shows an example of the modeling result by the same embodiment and Comparative Example 1. It is explanatory drawing which provides for the explanation of the discharge result of the modeling liquid in the comparative example 2. It is a flow figure which provides the explanation of the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. An outline of an example of the apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic plan explanatory view of the device, FIG. 2 is a schematic side view, and FIG. 3 is a cross-sectional explanatory view of the modeling portion. Note that FIG. 3 shows the state at the time of modeling.

The device for modeling this three-dimensional model (referred to as a three-dimensional model) is a powder laminate modeling device, and the modeling unit 1 on which the modeling layer 30 which is a layered model to which powder (powder) is bonded is formed. It is provided with a modeling unit 5 for modeling the modeling layer 30 by discharging and applying the modeling liquid 10 to the powder layer 31 spread in layers of the modeling unit 1.

The modeling unit 1 includes a powder tank 11 and a flattening roller 12 as a rotating body which is a flattening member (recoater). The flattening member may be, for example, a plate-shaped member (blade) instead of the rotating body.

When the powder tank 11 forms a supply tank 21 that holds the powder 20 to be supplied to the modeling tank 22, a modeling tank 22 in which the modeling layers 30 are laminated to form a three-dimensional model, and a powder layer 31. Of the powder 20 transferred and supplied by the flattening roller 12, the surplus powder receiving tank 29 for storing the surplus powder 20 that falls without forming the powder layer 31 is provided.

The bottom of the supply tank 21 can be raised and lowered in the vertical direction (height direction) as the supply stage 23. Similarly, the bottom of the modeling tank 22 can be raised and lowered in the vertical direction (height direction) as the modeling stage 24. A three-dimensional model in which the modeling layer 30 is laminated on the modeling stage 24 is modeled. The bottom surface of the surplus powder receiving tank 29 is provided with a mechanism for sucking the powder 20, or the surplus powder receiving tank 29 can be easily removed.

The supply stage 23 is moved up and down in the arrow Z direction (height direction) by the motor 27 described later, and the modeling stage 24 is also moved up and down in the arrow Z direction by the motor 28.

The flattening roller 12 transfers the powder 20 supplied on the supply stage 23 of the supply tank 21 to the modeling tank 22 and supplies the powder 20 to the layer of the powder 20 supplied by the flattening roller 12 which is a flattening means. The surface is leveled and flattened to form the powder layer 31.

The flattening roller 12 is arranged so as to be reciprocally movable relative to the stage surface in the arrow Y direction along the stage surface (the surface on which the powder 20 is loaded) of the modeling stage 24, and the reciprocating movement described later It is moved by the mechanism 25. Further, the flattening roller 12 is rotationally driven by a motor 26 described later.

On the other hand, the modeling unit 5 includes a liquid discharge unit 50 that discharges and applies the modeling liquid 10 to the powder layer 31 on the modeling stage 24.

The liquid discharge unit 50 includes a carriage 51 and two (one or three or more) liquid discharge heads (hereinafter, simply referred to as “heads”) 52a, which are molding liquid applying means mounted on the carriage 51. It is equipped with 52b.

The carriage 51 is movably held by the guide members 54 and 55. The guide members 54 and 55 are held on the side plates 70 and 70 on both sides so as to be able to move up and down.

The carriage 51 is referred to in the arrow X direction (hereinafter, simply referred to as “X direction”) which is the main scanning direction via the pulley and the belt by the X direction scanning motor constituting the X direction scanning mechanism 550 described later, with respect to other Y and Z. The same applies to.).

The two heads 52a and 52b (hereinafter, referred to as "head 52" when not distinguished) are provided with two rows of nozzles in which a plurality of nozzles for discharging a modeling liquid are arranged. The two nozzle rows of one head 52a discharge the cyan molding liquid and the magenta molding liquid. The two nozzle rows of the other head 52b discharge the yellow molding liquid and the black molding liquid, respectively. The head configuration is not limited to this.

A plurality of tanks 60 containing each of these cyan modeling liquid, magenta modeling liquid, yellow modeling liquid, and black modeling liquid are mounted on the tank mounting portion 56, and are supplied to the heads 52a and 52b via a supply tube and the like.

Further, on one side in the X direction, a maintenance mechanism 61 for maintaining and recovering the head 52 of the liquid discharge unit 50 is arranged.

The maintenance mechanism 61 is mainly composed of a cap 62 and a wiper 63. The cap 62 is brought into close contact with the nozzle surface (the surface on which the nozzle is formed) of the head 52, and the modeling liquid is sucked from the nozzle. This is to discharge the powder clogged in the nozzle and the highly viscous modeling liquid. After that, in order to form the meniscus of the nozzle (the inside of the nozzle is in a negative pressure state), the nozzle surface is wiped (wiped) with the wiper 63. Further, the maintenance mechanism 61 covers the nozzle surface of the head with the cap 62 when the modeling liquid is not discharged, and prevents the powder 20 from being mixed into the nozzle and the modeling liquid 10 from drying.

The modeling unit 5 has a slider portion 72 movably held by a guide member 71 arranged on the base member 7, and the entire modeling unit 5 reciprocates in the Y direction (sub-scanning direction) orthogonal to the X direction. It is possible. The entire modeling unit 5 is reciprocated in the Y direction by the Y-direction scanning mechanism 552 described later.

The liquid discharge unit 50 is arranged so as to be able to move up and down in the arrow Z direction together with the guide members 54 and 55, and is moved up and down in the Z direction by the Z direction raising and lowering mechanism 551 described later.

Here, the details of the modeling unit 1 will be described.

The powder tank 11 has a box shape, and includes a supply tank 21, a modeling tank 22, and a tank in which the upper surfaces of the surplus powder receiving tank 29 are open. A supply stage 23 is arranged inside the supply tank 21, and a modeling stage 24 is arranged inside the modeling tank 22 so as to be able to move up and down.

The side surface of the supply stage 23 is arranged so as to be in contact with the inner side surface of the supply tank 21. The side surface of the modeling stage 24 is arranged so as to be in contact with the inner surface surface of the modeling tank 22. The upper surfaces of the supply stage 23 and the modeling stage 24 are kept horizontal.

Next to the modeling tank 22, a surplus powder receiving tank 29 that receives excess powder discharged to the outside of the modeling tank 22 is arranged.

The surplus powder 20 of the powder 20 transferred and supplied by the flattening roller 12 drops into the surplus powder receiving tank 29 when the powder layer 31 is formed. The surplus powder 20 that has fallen into the surplus powder receiving tank 29 is returned to the powder supply device 554, which will be described later, to supply the powder to the supply tank 21 via, for example, a powder recovery / regeneration device.

The powder supply device 554 is arranged on the supply tank 21. During the initial operation of modeling or when the amount of powder in the supply tank 21 decreases, the powder in the tank constituting the powder supply device 554 is supplied to the supply tank 21. Examples of the powder transport method for powder supply include a screw conveyor method using a screw and an air transport method using air.

The flattening roller 12 transfers and supplies the powder 20 from the supply tank 21 to the modeling tank 22 and flattens the surface to form a powder layer 31 which is a layered powder having a predetermined thickness. ..

The flattening roller 12 is a rod-shaped member longer than the inner dimensions of the modeling tank 22 and the supply tank 21 (that is, the width of the portion where the powder is provided or the portion where the powder is charged), and the stage surface is provided by the reciprocating moving mechanism. It is reciprocated in the Y direction (secondary scanning direction) along the above.

The flattening roller 12 moves horizontally so as to pass above the supply tank 21 and the modeling tank 22 from the outside of the supply tank 21 while being rotated by the motor of the reciprocating movement mechanism. As a result, the powder 20 is transferred and supplied onto the modeling tank 22, and the powder layer 31 is formed by flattening the powder 20 while the flattening roller 12 passes over the modeling tank 22.

Further, as shown in FIG. 2, a powder removing plate 13 which is a powder removing member for removing the powder 20 adhering to the flattening roller 12 in contact with the peripheral surface of the flattening roller 12 is arranged. Has been done.

The powder removing plate 13 moves together with the flattening roller 12 in contact with the peripheral surface of the flattening roller 12. Further, the powder removing plate 13 can be arranged in the forward direction even in the counter direction when the flattening roller 12 rotates in the rotation direction when flattening.

Next, the outline of the control unit of the three-dimensional modeling apparatus will be described with reference to FIG. FIG. 4 is a block diagram of the control unit.

The control unit 500 stores a CPU 501 that controls the entire device, a program including a program according to the present invention for causing the CPU 501 to execute control of a three-dimensional modeling operation including the control according to the present invention, and other fixed data. It includes a main control unit 500A including a ROM 502 and a RAM 503 that temporarily stores modeling data and the like.

The control unit 500 includes a non-volatile memory (NVRAM) 504 for holding data even while the power of the device is cut off. Further, the control unit 500 includes an ASIC 505 that processes an image process that performs various signal processes on the image data and other input / output signals for controlling the entire device.

The control unit 500 includes an I / F 506 for transmitting and receiving data and signals used when receiving modeling data from the external modeling data creating device 600.

The modeling data creation device 600 creates data for modeling the three-dimensional model according to the present invention, which creates modeling data which is slice data obtained by slicing the final form of the model (three-dimensional model) for each modeling layer. It is a device and is composed of an information processing device such as a personal computer.

The control unit 500 includes an I / O 507 for capturing detection signals of various sensors.

The control unit 500 includes a head drive control unit 508 that drives and controls the head 52 of the liquid discharge unit 50.

The control unit 500 drives the motor drive unit 510 that drives the motor constituting the X-direction scanning mechanism 550 that moves the carriage 51 of the liquid discharge unit 50 in the X direction (main scanning direction), and the modeling unit 5 in the Y direction (sub-scanning). It includes a motor drive unit 512 that drives a motor that constitutes a Y-direction scanning mechanism 552 that moves in the direction (direction).

The control unit 500 includes a motor drive unit 511 that drives a motor that constitutes a Z-direction elevating mechanism 551 that moves (elevates) the carriage 51 of the liquid discharge unit 50 in the Z direction. It should be noted that the elevating and lowering in the direction of the arrow Z may be configured to elevate and lower the entire modeling unit 5.

The control unit 500 includes a motor drive unit 513 that drives the motor 27 that raises and lowers the supply stage 23, and a motor drive unit 514 that drives the motor 28 that raises and lowers the modeling stage 24.

The control unit 500 includes a motor drive unit 515 that drives the motor 553 of the reciprocating movement mechanism 25 that moves the flattening roller 12, and a motor 26 that drives the motor 26 that rotationally drives the flattening roller 12.

The control unit 500 includes a supply system drive unit 517 that drives the powder supply device 554 that supplies the powder 20 to the supply tank 21, and a maintenance drive unit 518 that drives the maintenance mechanism 61 of the liquid discharge unit 50.

The control unit 500 includes a post-supply drive unit 519 that supplies the powder 20 from the powder post-supply unit 80.

A detection signal such as a temperature / humidity sensor 560 that detects temperature and humidity as an environmental condition of the device and a detection signal of other sensors are input to the I / O 507 of the control unit 500.

An operation panel 522 for inputting and displaying information necessary for this device is connected to the control unit 500.

As described above, the control unit 500 receives the modeling data from the modeling data creating device 600. The modeling data includes shape data (modeling data) of each modeling layer 30 as slice data obtained by slicing the shape of the target three-dimensional modeled object.

Then, the main control unit 500A controls to discharge the modeling liquid from the head 52 based on the modeling data of the modeling layer 30.

The modeling device is configured by the modeling data creation device 600 and the three-dimensional modeling device (powder lamination modeling device) 601.

Next, the flow of modeling will be described with reference to FIG. FIG. 5 is a schematic explanatory view for explaining the flow of modeling.

Here, the state in which the first modeling layer 30 is formed on the modeling stage 24 of the modeling tank 22 will be described.

When the next modeling layer 30 is formed on the first modeling layer 30, the supply stage 23 of the supply tank 21 is raised in the Z1 direction as shown in FIG. 5A, and the modeling stage of the modeling tank 22 is formed. 24 is lowered in the Z2 direction.

At this time, the modeling stage 24 is lowered so that the distance (stacking pitch) between the upper surface of the surface (powder surface) of the powder layer 31 of the modeling tank 22 and the lower portion (lower tangential portion) of the flattening roller 12 is Δt1. Set the distance. The interval Δt1 of the above corresponds to the thickness (stacking pitch) of the powder layer 31 to be formed next. The interval Δt1 is preferably about several tens to 100 μm.

In this case, the flattening roller 12 is arranged with a gap between the upper end surfaces of the supply tank 21 and the modeling tank 22. Therefore, when the powder 20 is transferred and supplied to the modeling tank 22 to be flattened, the surface (powder surface) of the powder layer 31 is located higher than the upper end surfaces of the supply tank 21 and the modeling tank 22.

As a result, the flattening roller 12 can be reliably prevented from coming into contact with the upper end surfaces of the supply tank 21 and the modeling tank 22, and damage to the flattening roller 12 is reduced. When the surface of the flattening roller 12 is damaged, streaks are generated on the surface of the powder layer 31 and the flatness is lowered.

Next, as shown in FIG. 5B, the powder 20 located above the upper surface level of the supply tank 21 is rotated in the Y2 direction (modeling tank 22) while rotating the flattening roller 12 in the opposite direction (arrow direction). By moving to the side), the powder 20 is transferred and supplied to the modeling tank 22 (powder supply).

Further, as shown in FIG. 5C, the flattening roller 12 is moved in parallel with the stage surface of the modeling stage 24 of the modeling tank 22, and the powder has a predetermined thickness Δt1 on the modeling layer 30 of the modeling stage 24. Form the body layer 31 (flattening). At this time, the surplus powder 20 not used for forming the powder layer 31 falls into the surplus powder receiving tank 29.

After forming the powder layer 31, the flattening roller 12 is moved in the Y1 direction and returned (returned) to the initial position (origin position) as shown in FIG. 5D.

Here, the flattening roller 12 can move while keeping a constant distance from the upper surface level of the modeling tank 22 and the supply tank 21. By being able to move while being kept constant, the powder 20 having a uniform thickness Δt1 is conveyed on the modeling tank 22 or the already formed modeling layer 30 while being conveyed on the modeling tank 22 by the flattening roller 12. Layer 31 can be formed.

After that, as shown in FIG. 5 (e), droplets of the modeling liquid 10 are ejected from the head 52 of the liquid discharge unit 50, and the modeling layer 30 having a required shape is laminated and formed on the next powder layer 31 (modeling). ).

In the modeling layer 30, for example, when the modeling liquid 10 discharged from the head 52 is mixed with the powder 20, the adhesive contained in the powder 20 is dissolved, and the dissolved adhesives are bonded to each other. It is formed by binding the powder 20.

Next, the step of forming the powder layer 31 by the powder supply and flattening described above and the step of discharging the molding liquid by the head 52 are repeated to form a new molding layer 30. At this time, the new modeling layer 30 and the underlying modeling layer 30 are integrated to form a part of the three-dimensional shaped object (three-dimensional model).

After that, the three-dimensional shaped object (three-dimensional shaped object) is completed by repeating the step of forming the powder layer 31 by supplying and flattening the powder and the step of discharging the modeling liquid by the head 52 as many times as necessary.

Next, the powder (powder material for three-dimensional modeling) and the modeling liquid used in the present embodiment will be described.

The powder material for three-dimensional modeling includes a base material and a water-soluble organic material (binder) that covers the base material with an average thickness of 5 nm to 500 nm and can be dissolved and crosslinked by the action of water containing a cross-linking agent as a modeling liquid. It will be done.

In this powder material for three-dimensional modeling, the water-soluble organic material that coats the base material can be dissolved and crosslinked by the action of the cross-linking agent-containing water. Therefore, when the water-soluble organic material is provided with the cross-linking agent-containing water, The water-soluble organic material dissolves and is crosslinked by the action of the crosslinking agent contained in the crosslinking agent-containing water.

As a result, a thin layer (powder layer 31) was formed using the powder material for three-dimensional modeling, and water containing a cross-linking agent was discharged to the powder layer as a modeling liquid, whereby the powder layer 31 was dissolved. As a result of cross-linking the water-soluble organic material, the powder layer 31 is bond-hardened to form the modeling layer 30.

Next, the first embodiment of the present invention will be described with reference to FIG. FIG. 6 is an explanatory diagram provided for explaining the discharge result of the modeling liquid in the same embodiment.

In the present embodiment, for one pixel G1, the modeling liquid 10 is applied a plurality of times so that the droplet D1 landing on the powder layer 31 overlaps at least a part on the powder layer 31 (on the powder), that is, 1 Control is performed to eject the droplet D1 a plurality of times toward the modeling region of the pixel G1. Here, the drop D1 is applied four times, but it is not limited to four times.

In this case, the plurality of drops D1 may be applied at the same position, or some of them may be applied in an overlapping manner. Further, in the present embodiment, by scanning the head 52 four times (four scans), the droplet D1 of the modeling liquid 10 is ejected and imparted four times to one pixel. Further, the amount applied once is an amount that becomes the amount of liquid required for modeling one pixel by applying four times.

In this way, by dividing the amount of liquid required for modeling one pixel into a plurality of times and applying it so that at least a part of the liquid overlaps, the amount of liquid of the modeling liquid per time is reduced, and the force of the liquid cross-linking force is increased. It is weakened, the surface roughness and dimensional accuracy of the modeled object can be improved, and the modeling quality can be improved.

In this case, it is preferable that the positions where the drops D1 are applied a plurality of times (positions where they land) are the same. When the imparting position is different, a mesh-like pattern is likely to occur on the surface of the landing surface.

Next, Comparative Example 1 will be described with reference to FIG. 7. FIG. 7 is an explanatory diagram provided for explaining the discharge result of the modeling liquid in Comparative Example 1.

In Comparative Example 1, a drop D4 having a liquid amount required for modeling one pixel G1 is applied at one time.

In Comparative Example 1, since the modeling liquid 10 is applied to the entire region of 1 pixel G1 almost simultaneously, the liquid cross-linking force acts almost simultaneously over the entire region of 1 pixel, and the powder 20 becomes coarse and dense as a whole. , The surface roughness and dimensional accuracy of the modeled object are reduced, and the required image quality cannot be obtained.

Here, an example of the modeling result according to the present embodiment and Comparative Example 1 is shown in FIG. FIG. 8A shows the surface of the modeled object of the present embodiment, and FIG. 8B shows the surface of the modeled object of Comparative Example 1.

From this result, it can be seen that the surface irregularities of the modeled object of this embodiment are reduced as compared with the modeled object of Comparative Example 1.

Next, Comparative Example 2 will be described with reference to FIG. FIG. 9 is an explanatory diagram provided for explaining the discharge result of the modeling liquid in Comparative Example 2.

In Comparative Example 2, the 1-pixel G1 of the present embodiment is divided into 4 parts as the 1-pixel G2, and the droplet D1 is added to each of the 4 pixels G2.

Although the accuracy is improved by increasing the resolution as in Comparative Example 2, the time required for the modeling liquid to land on the powder layer and the powder to bond and harden due to the addition of droplets of the modeling liquid at different positions. Because of the difference, the surface of the modeled object becomes a mesh pattern, and the surface roughness is reduced.

On the other hand, in the present embodiment, the resolution is not increased, and the modeling liquid is applied to a position where at least a part of the powder overlaps. Therefore, even if the modeling liquid is applied a plurality of times, the time required for the powder to bond and cure is long. Since no large difference occurs, the surface roughness is improved and the accuracy is improved.

Next, the second embodiment of the present invention will be described with reference to the flow chart of FIG.

First, the modeling device 601 is selected to perform the modeling operation with priority given to accuracy or speed. In this case, it is also possible to select accuracy priority and speed priority for the specified area. This designation can also be added to the modeling data (slice data) in advance by the modeling data creation device 600, and the modeling data read out on the three-dimensional modeling device (powder lamination modeling device) 601 can be analyzed and selected (set). ..

Then, recoating is performed to form the powder layer 31 in the modeling tank 22.

After that, it is determined whether or not the modeling operation gives priority to accuracy.

At this time, if accuracy is prioritized, the modeling liquid 10 is such that at least a part of the droplet D1 landing on the powder layer 31 overlaps on the powder layer 31 for one pixel G1 as in the first embodiment described above. Is applied a plurality of times to form the modeling layer 30.

On the other hand, if accuracy is not prioritized, that is, if speed is prioritized, a drop D2 of the modeling liquid 10 is discharged once for one pixel G1 and applied to the modeling layer 30 as in the case of Comparative Example 1 described above. To model.

Then, the above process is repeated until the final modeling layer is formed, and the process is completed when the final modeling layer is formed.

Here, the functions of accuracy priority and speed priority will be described.

When used for a three-dimensional model, for example, for confirming a jig or a mechanism, it is considered that the speed of modeling is required rather than the accuracy of the three-dimensional model. On the other hand, when it is used as a part of a product, it is considered that accuracy is required rather than the speed of modeling. Further, it is considered that there are a region where it is preferable to give priority to accuracy and a region where accuracy is not required even in the three-dimensional modeled object.

Therefore, by making it possible to select whether or not to control the application of the modeling liquid a plurality of times, it is possible to cope with the case where the modeling speed is required. Further, by making it possible to select a region for controlling the application of the modeling liquid a plurality of times, it is possible to secure the required accuracy while giving priority to the speed.

In this case, when the modeling data is created on the modeling data creation device side, the shape of the modeled object is determined, and a control for applying the modeling liquid a plurality of times is executed for a predetermined area constituting the predetermined shape. It is also possible to create modeling data (slice data) to which data is added.

For example, an inclined surface (especially less than 45 °) of a three-dimensional model, a side wall surface of a cylinder (especially less than φ0.8 mm), an inner wall surface of a circular hole (especially less than φ0.6 mm), and a wall surface of a slit (especially less than 0.4 mm). For the region forming at least one of the above, these shapes can be shaped with high accuracy by controlling the application of the molding liquid a plurality of times.

In the above embodiment, the three-dimensional modeling device having a two-layer structure of a supply tank and a modeling tank has been described. However, the three-dimensional modeling device has a one-layer structure of the modeling tank, and powder is directly supplied to the modeling tank to be flattened by means such as blades and rollers. The present invention can also be applied to a three-dimensional modeling apparatus having a flattening configuration.

1 Modeling part 5 Modeling unit 10 Modeling liquid 12 Flattening roller (flattening means)
20 Powder 21 Supply tank 22 Modeling tank 23 Supply stage 24 Modeling stage 30 Modeling layer (layered model)
31 Powder layer (layered powder)
50 Liquid discharge unit 51 Carriage 52 Liquid discharge head 500 Control unit

Claims (4)

A modeling liquid applying means for forming a layered model by applying a modeling liquid for binding the powder to the spread powder, and
A means for controlling the formation of a three-dimensional model in which the layered model is laminated by repeating the operation of spreading the powder and the operation of applying the modeling liquid from the modeling liquid applying means to form the layered model. And with
The means for controlling the above
When modeling the layered model , the modeling liquid application means is applied a plurality of times for a region forming at least one of an inclined surface of the three-dimensional model, a side wall surface of a cylinder, an inner wall surface of a circular hole, and a wall surface of a slit. A device for modeling a three-dimensional model, which is characterized by scanning and controlling one pixel to apply the same modeling liquid a plurality of times so that a part of the powder overlaps. The operation of spreading the powder and the operation of applying the modeling liquid for binding the powder to the spread powder to form the layered model are repeated to obtain a three-dimensional model in which the layered model is laminated. It ’s a method of modeling,
When modeling the layered model , the modeling liquid that applies the modeling liquid to the region that forms at least one of the inclined surface of the three-dimensional model, the side wall surface of the column, the inner wall surface of the circular hole, and the wall surface of the slit. A method for modeling a three-dimensional object, characterized in that the applying means is scanned a plurality of times to apply the same modeling liquid to one pixel a plurality of times so that a part of the powder overlaps. The operation of spreading the powder and the operation of applying the modeling liquid for binding the powder to the spread powder to form the layered model are repeated to obtain a three-dimensional model in which the layered model is laminated. It is a program that allows a computer to control modeling.
When modeling the layered model , the modeling liquid that applies the modeling liquid to the region that forms at least one of the inclined surface of the three-dimensional model, the side wall surface of the cylinder, the inner wall surface of the circular hole, and the wall surface of the slit. A program characterized in that the applying means is scanned a plurality of times, and a computer is controlled to apply the same modeling liquid a plurality of times so that a part of one pixel overlaps on the powder. The operation of spreading the powder and the operation of applying the modeling liquid for binding the powder to the spread powder to form the layered model are repeated to obtain a three-dimensional model in which the layered model is laminated. It is a method of creating modeling data of the layered modeled object to be given to the modeling device to be modeled.
With respect to the region forming at least one of the inclined surface of the three-dimensional model, the side wall surface of the cylinder, the inner wall surface of the circular hole, and the wall surface of the slit, the modeling liquid applying means for applying the modeling liquid is scanned a plurality of times. A method for creating modeling data of a three-dimensional model, which comprises creating modeling data in which the same modeling liquid is applied a plurality of times so that a part of one pixel overlaps on the powder.

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