JP2017121719A - Three-dimensional molding device and three-dimensional molding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely produce a molding produced by three-dimensional molding.SOLUTION: Blocks 106 of a two-layers structure are laminated and bonded to improve impact strength at the lamination interface, and the laminated and bonded blocks 106 are processed to achieve improvement in the precision of a three-dimensional molding.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a three-dimensional modeling apparatus and a three-dimensional modeling method for manufacturing a modeled object by processing a modeled object.

  Conventional three-dimensional modeling techniques include an extrusion method and an ink jet method. FIG. 14 is a diagram showing a concept of a conventional extrusion method described in Patent Document 1, and FIG. 15 is a diagram showing a concept of a conventional extrusion method described in Patent Document 2. As shown in FIGS. 14 and 15, a material melted by heat to give fluidity was extruded into a thin thread shape, and a three-dimensional object was made while laminating in the manner of a single stroke. Alternatively, a modeled object is formed by stacking a plurality of blocks, and the modeled object is processed to manufacture a modeled object.

JP-A-4-288974 JP-A-7-227895

  However, since the interface between the yarn and the yarn is a line contact, there is a problem that the impact strength from the side is weak in the stacking direction. Furthermore, since the yarn and the yarn are laminated, the surface of the three-dimensional object (three-dimensional structure) is not molded as designed, and the manufacturing accuracy may be deteriorated. In addition, when the blocks are simply stacked, the blocks are displaced during processing, and there is a case where a shaped article as designed cannot be manufactured.

  An object of the present invention is to accurately manufacture a modeled object manufactured by three-dimensional modeling.

  In order to achieve the above object, a three-dimensional modeling apparatus of the present invention is a three-dimensional modeling apparatus that manufactures a modeled object by three-dimensionally modeling a modeled object including a plurality of blocks, wherein the blocks are arranged. An apparatus table that becomes a modeling area, an automatic support unit that is provided on the apparatus table and fixes the block, and a block that supplies the block prepared in advance onto the apparatus table and arranges the object to be modeled A block having a supply device, a processing device for processing the supplied object to be shaped, and a temperature control unit for heating the block, wherein the block is formed of a material having a lower melting point than the block main body and the block main body. It is composed of a convex part and a block concave part formed in the block body, and the block convex part of one block is the other block in the stacked state of the blocks. Tsu is inserted structure for a click recess, the automatic support unit is characterized in that the tip is configured to fix the said block in a state of being inserted into the block recess.

  Moreover, the three-dimensional modeling method of the present invention is a three-dimensional modeling method for manufacturing a modeled object by three-dimensionally modeling a modeled object composed of a plurality of blocks arranged on an apparatus table including an automatic support unit, The block is composed of a block main body, a block convex portion formed of a material having a lower melting point than the block main body, and a block concave portion formed in the block main body, and the arrangement of the block corresponding to the shape of the modeled object A step of locating the block according to the determined arrangement so that the automatic support portion or the block convex portion is inserted into the block concave portion of the upper block, and heating the block The step of melting the block protrusions and the blocks stacked by cooling the block protrusions are bonded to each other to form the object to be shaped And that step, characterized in that a step of manufacturing the shaped article above with the shaped three-dimensional to be shaped object.

  As described above, according to the three-dimensional modeling apparatus of the present invention, the impact strength at the lamination interface is improved by laminating and adhering the two-layer structure blocks, and the laminated and adhered blocks are processed three-dimensionally. The accuracy improvement of a molded article can be achieved.

The perspective view which illustrates the composition of the three-dimensional modeling device in Embodiment 1 of the present invention. The top view which illustrates the composition of the three-dimensional fabrication device in Embodiment 1 of the present invention. The figure which illustrates the structure of the block of the 2 layer structure in the three-dimensional modeling apparatus of Embodiment 1 of this invention The figure which illustrates the structure of the automatic support part of the three-dimensional modeling apparatus in Embodiment 1 of this invention. The figure which illustrates the flowchart of the modeling process in Embodiment 1 of this invention The figure which illustrates the state of the block after lamination in Embodiment 1 of the present invention The figure which illustrates the state of the molded article after the cutting in Embodiment 1 of this invention The figure which illustrates each part temperature profile for every modeling process in Embodiment 1 of this invention The figure which illustrates the structure of the honeycomb block in Embodiment 2. The figure which illustrates the structure of the apparatus table of the three-dimensional modeling apparatus in Embodiment 2, and the arrangement | positioning state of a honeycomb block The figure which illustrates the multiple types of block shape in Embodiment 3 of this invention The figure which illustrates the multiple types of block shape in Embodiment 3 of this invention The figure which illustrates the multiple types of block shape in Embodiment 3 of this invention The figure which shows the concept of the conventional extrusion method described in patent document 1 The figure which shows the concept of the conventional extrusion method described in patent document 2

Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)
FIG. 1 is a perspective view illustrating the configuration of the three-dimensional modeling apparatus according to the first embodiment of the present invention, and FIG. 2 is a plan view illustrating the configuration of the three-dimensional modeling apparatus according to the first embodiment of the present invention. In FIG. 2, the same components as those in FIG.

  The three-dimensional modeling apparatus 108 shown in FIG. 1 and FIG. 2 is accessed from the front of the apparatus table unit 107, has an atmosphere temperature control unit 101 at the back of both sides, and a multi-axis robot unit between the two atmosphere temperature control units 101. 104. In the apparatus table unit 107, the automatic support unit 105 is disposed on the entire work surface. The multi-axis robot unit 104 has a chuck unit 102 and a cutting unit 103 attached to the tip thereof so that they can be selectively replaced. Although the structure which attaches the chuck | zipper part 102 or the cutting part 103 to the one multi-axis robot part 104 which serves as both a block supply apparatus and a cutting apparatus may be sufficient, the structure which processing apparatuses, such as a block supply apparatus and a cutting apparatus, respectively become independent may be sufficient. The block supply unit 110 stores the block 106, and the chuck unit 102 supplies the block 106 from the block supply unit 110 to the apparatus table unit 107.

FIG. 3 shows a structural example of a two-layer block in the three-dimensional modeling apparatus according to Embodiment 1 of the present invention.
The block 106 is configured such that a low melting point material 202 having a melting point lower than that of the high melting point material 203 is laminated on the high melting point material 203 which is a block body. The high melting point material 203 has a rectangular parallelepiped shape, and includes a block recess 112 on the bottom surface. The low melting point material 202 is a block convex portion 111 having a quadrangular pyramid or triangular pyramid shape. The block concave portion 112 and the block convex portion 111 in one block 106 may be formed at a position corresponding to a case where the block concave portion 112 is laminated immediately above, but the block concave portion 112 may be formed excessively. When the block concave portion 112 is formed in excess, the block concave portion 112 into which the block convex portion 111 is inserted can be selected when the blocks 106 are stacked while being shifted from each other, and the degree of freedom of the stacked configuration is improved. It is preferable that the block recess 112 and the block protrusion 111 have the same shape and volume so that the adhesive strength between the blocks 106 can be easily secured. The relationship of the external dimensions of the block 106 is composed of, for example, a short side and a long side in a plane parallel to the surface of the mounting table 107, and the height of the block 106 is a volume that can maintain the block shape when the high melting point material 203 is formed. Therefore, it is desirable that the height of the block is ½ or more of the short side of the block 106.

  Here, depending on the shape of the three-dimensional structure, there is a case where the conventional three-dimensional structure apparatus cannot hold the three-dimensional structure on the table part because the block 106 is simply stacked and falls due to its own weight. Therefore, the three-dimensional modeling apparatus according to Embodiment 1 of the present invention has an automatic support unit 105.

FIG. 4 shows a structural example of the automatic support unit 105 in the three-dimensional modeling apparatus according to Embodiment 1 of the present invention.
The automatic support portion 105 has the same shape as the block convex portion 111 in which the shape of the front end portion 105a of the automatic support portion is laminated, and the portion below the front end portion 105a becomes the shaft portion 105b of the automatic support portion, and the shape thereof is a triangular prism. Or any shape such as a quadrangular prism shape. The automatic support unit 105 can be driven up and down by the drive unit 105c.

Next, the temperature control configuration on the apparatus table 107 side will be described with reference to FIG.
In FIG. 4, in the configuration related to the temperature control of the three-dimensional modeling apparatus 108, the high thermal conductive material 402 is disposed below the apparatus table unit 107, and the support temperature control unit 401 is disposed at one or both ends of the end part. The automatic support part 105 is always in contact with the high thermal conductive material 402. The support temperature control unit 401 controls the temperature of the high heat conductive material 402 with a heater, cooling water, and the like, heats and cools the automatic support unit 105, and the apparatus table unit 107 is heated and cooled by the heat of the automatic support unit 105. In addition, the block 106 that is in contact with the automatic support portion 105 via the block recess 112 is also heated and cooled. In order to further improve the heating and cooling efficiency, a pipe may be installed inside the automatic support unit 105 to circulate water, refrigerant gas, or the like. The ambient air may be heated and cooled. Here, in order to further promote the temperature change inside the block 106, the shape of the quadrangular prism and the triangular prism of the shaft portion 105 b of the automatic support portion 105 may be inserted into the block recess 112 of the block 106.

FIG. 5 shows a flowchart of the modeling process in the first embodiment of the present invention. In the following description, the symbols used in FIGS. 1 and 2 are used for the components shown in FIGS.
The outline of the operation is as follows. First, 3D-CAD data is created (STEP 1) and converted into slice data in which the height of the block 106 is one layer thickness (STEP 2). Next, the selection of the block and the arrangement of the block for efficiently creating a model from the slice data are calculated for each layer of the stacked blocks (STEP 3). Next, the multi-axis robot unit 104 operates and the chuck unit 102 takes the necessary blocks for the block supply unit 110, and the necessary number of blocks 106 are stacked one by one on the device table 107 including the automatic support unit 105. Repeat the stacking operation until The automatic support unit 105 is configured in such a manner that only the front end 105a of the automatic support unit protrudes in advance to the center of the grid provided in the device table unit 107. When the entire bottom surface of the object to be formed of the plurality of blocks 106 arranged is in contact with the apparatus table unit 107, the automatic support unit 105 in which only the front end 105a protrudes is inserted into the block recess 112 of each block 106 constituting the bottom surface. Thus, each block 106 is fixed (STEP 6 to STEP 8). Here, depending on the shape of the modeled object, a part of the bottom surface of the modeled object composed of the plurality of arranged blocks 106 may not be in contact with the apparatus table unit 107. That is, in the region where the block 106 is formed, a space may be formed between the surface of the apparatus table unit 107 and the block 106. This space is referred to as a hollow, and is in a state like the hollow 113 in FIG. 4, for example. As described above, when the hollow 113 is formed on the lower side of the molded article 201, the automatic support unit 105 is protruded so that the tip 105 a is inserted into the block recess 112 of the block 106 immediately above the hollow 113. The modeling is advanced while supporting the block 106 (STEP4, STEP5).
When the lamination of the blocks 106 is completed, the atmosphere temperature control unit 101 and the automatic support unit 105 are heated to melt the surface of the low melting point material 202 (STEP 9), and then the atmosphere temperature control unit 101 is blown and the automatic support unit The blocks 106 are cooled by 105 to adhere the blocks 106 to each other. That is, the low melting point material 202 is used for bonding the plurality of stacked blocks 106 (STEP 10).

  Then, the shaped object 201 is formed by cutting the block 106 which accommodated the hollow automatic support part 105 and was laminated | stacked by the cutting part 103 (STEP11). FIG. 6 shows a state of an object to be molded in which blocks are stacked, and FIG. 7 shows a state of the object 201 after cutting. In FIG. 6, the stacked blocks 106 are bonded to each other by the low melting point material 202 at the upper and lower adjacent blocks, and may also be bonded to the apparatus table 107 by the low melting point material 202. In this case, the low melting point material 202 is provided at the front end portion 105a of the automatic support portion. In FIG. 7, an unnecessary portion of the stacked blocks 106 is removed by the cutting unit 103, and finally a necessary shape of the modeled object 201 is completed. Finally, the automatic support unit 105 in contact with the modeled object 201 is accommodated, and then the automatic support unit 105 is pushed up, and the modeled object 201 is separated from the surface of the apparatus table unit by 0.2 mm or more to remove the modeled object 201. Complete (STEP 12).

  In FIG. 8, each part temperature profile for every modeling process in Embodiment 1 of this invention is illustrated. The operation of the automatic support unit 105 and the temperature change of each unit during the operation will be described with reference to FIG. 1-4 are used for the components shown in FIGS.

  The automatic support unit 105 before starting the stacking of the blocks 106 protrudes only at the tip 105a with the shaft 105b in the apparatus table 107 at room temperature (23 degrees). At this time, the temperature of each part is as follows: the atmospheric temperature 109 in the apparatus, the atmospheric temperature control unit 101, the apparatus table unit 107, the automatic support unit 105, the support temperature control unit 401, the high thermal conductive material 402, the modeled object (surface) 403, and the modeled object (Inside) 404 is all at room temperature (23 ° C.).

  Next, the temperature of each part at the time of starting the stacking of the blocks 106 is the atmospheric temperature 109 in the apparatus and the atmospheric temperature control unit 101 does not melt the low melting point material 202 and does not cause a heating time loss for starting modeling. At the temperature of 90 ° C., the device table unit 107, the automatic support unit 105, the support temperature control unit 401, and the high thermal conductive material 402 are the temperature TA at which the low melting point material is melted and the temperature at which the high melting point material is melted. The molded object (surface) 403 and the molded object (inside) 404 are at room temperature (23 ° C.) at a low temperature, for example, 60 ° C. in the range of 10 ° C. to 50 ° C. which is the temperature difference of TB. From there, the blocks 106 are stacked. When the lower part is hollow, the automatic support part 105 is protruded to a position where stacking is possible, and the stacking is repeated. At this time, the temperature of each part during the stacking is the atmospheric temperature 109 in the apparatus, the atmospheric temperature control unit 101 is 90 ° C., the apparatus table unit 107, the automatic support unit 105, the support temperature control unit 401, the high thermal conductive material 402, and the modeled object. (Surface) 403 and shaped object (inside) 404 are 60 ° C. From the above steps, the temperature of each part is the same after the lamination is completed and before the start of bonding.

  Next, the process proceeds during preparation for bonding, during bonding, and during bonding. Specifically, the low-melting-point material 202 on the surface of the block 106 is melted by being heated by the ambient temperature control unit 101 and the automatic support unit 105. The temperature of the automatic support unit 105 at this time is set to a temperature TA at which the low melting point material 202 is melted by the support temperature control unit 401, and this temperature is about 10 ° C. to 50 ° C. compared to the temperature TB at which the high melting point material is melted. Low. The heat transfer is transferred to the high thermal conductivity material 402 to heat the automatic support part 105 and from there, the apparatus table part 107 is heated. In this process, the temperature of each part is the atmospheric temperature 109 in the apparatus, the atmospheric temperature control part 101 is 170 ° C., the apparatus table part 107, the automatic support part 105, the support temperature control part 401, the high thermal conductive material 402, the modeled object (surface ) 403 is lower by about 10 ° C. to 50 ° C. than the temperature TB at which the high melting point material 203 is melted. The shaped object (inside) 404 is the same as the temperature TA at which the low melting point material 202 is melted.

  Next, a transition is made from the time of bonding to the completion of bonding, but the blocks 106 are bonded together by cooling the low melting point material 202 by the blowing of the ambient temperature control unit 101 and the automatic support unit 105. The temperature of each part in this process is as follows: the atmospheric temperature 109 in the apparatus, the atmospheric temperature control unit 101, the apparatus table unit 107, the automatic support unit 105, the support temperature control unit 401, the high thermal conductive material 402, the modeled object (surface) 403, and the modeling All of the objects (inside) 404 are at room temperature (23 ° C.).

  Next, the process proceeds to the cutting process, but before that, the automatic support part 105 protruding from the hollow part is accommodated. The temperature of each part at the time of cutting is all normal temperature (23 ° C.), and the modeled article 201 is bonded to the apparatus table unit 107.

  After cutting, the process proceeds to the removal process. All of the automatic support units 105 are accommodated in the apparatus table unit 107, like the two automatic support units 105 on the left in FIG. The temperature of each part at the completion of the storage of the automatic support unit 105 is the atmospheric temperature 109 in the apparatus, the atmospheric temperature control unit 101, the apparatus table unit 107, the automatic support unit 105, the support temperature control unit 401, the high thermal conductive material 402, the modeled object ( The surface) 403 and the modeled object (inside) 404 are 60 ° C.

  Next, the process proceeds to a step of removing the model 201 that is in contact with the apparatus table unit 107, and the operation is completed by removing the model by pushing the automatic support unit 105 by 0.2 mm or more from the upper surface of the apparatus table unit. . At this time, the temperature of each part is 60.degree. C. for the atmospheric temperature 109 in the apparatus, the atmospheric temperature control part 101 and the modeled object (inside) 404, the automatic support part 105, the apparatus table part 107, the support temperature control part 401, and the high heat conductive material. 402-Modeling object (surface) 403 is 90 degreeC.

  Next, the automatic support unit 105 is stored again from the upper surface of the device table unit 107. The temperature of each part when the automatic support part 105 is completely stored is the atmospheric temperature 109 in the apparatus, the atmospheric temperature control part 101, the modeled object (surface) 403, and the modeled object (inside) 404 at room temperature (23 ° C.) and the apparatus table part. 107, the automatic support part 105, the temperature control part 401, and the high heat conductive material 402 are 60 degreeC.

Finally, the modeling is completed by lowering all the temperatures of each part to room temperature (23 ° C.).
The three-dimensional modeling apparatus and the three-dimensional modeling method according to the first embodiment of the present invention include an automatic support unit that is housed in a device table 107 that is a modeling region of a modeled object and can protrude from the surface of the device table 107, and The modeled object is composed of a plurality of blocks 106, the part to be modeled of the block 106 is made of a high melting point material 203, a block recess 112 is formed on the bottom surface of the block 106, and the high melting point material 203 is formed on the top surface of the block 106. When the block convex portion 111 made of the low melting point material 202 having a low melting point is formed and the blocks 106 are stacked, the block convex portion 111 of the lower block 106 is inserted into the block concave portion 112 of the upper block 106. It is a configuration. Then, when the plurality of blocks 106 are collected to form the object to be modeled, the low melting point material 202 is cooled by melting the low melting point material 202 in the block recess 112 by heating in a state where the blocks 106 are stacked. The upper and lower blocks 106 are bonded together, and the automatic support portion 105 is protruded from the surface of the mounting table 107, whereby the automatic support portion 105 is inserted into the block recess 112 of the lowermost block 106, and a plurality of blocks 106 are inserted. Modeling can be performed while fixing the object to be formed. Thereby, since the modeled object is in contact with the interface between the blocks 106 and further bonded, the impact strength can be improved as compared with the conventional method. Moreover, since it has the automatic support part 105, even if a hollow part exists under a molded article during lamination, the structure can be maintained without falling down due to its own weight. In this way, the material strength and accuracy of the modeled object can be improved, and it can be applied to production applications such as pseudo teeth in the medical dental technology field. Moreover, the automatic support part 105 can be used also for removal of a modeling object after modeling completion.
(Embodiment 2)
A three-dimensional modeling apparatus according to Embodiment 2 of the present invention will be described with reference to FIGS. 1, 2, 4, 9, and 10. FIG. 9 is a diagram illustrating the configuration of the honeycomb block in the second embodiment, and FIG. 10 is a diagram illustrating the configuration of the apparatus table of the three-dimensional modeling apparatus and the arrangement state of the honeycomb block in the second embodiment. 9 and 10, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted.

  In the three-dimensional modeling apparatus in the second embodiment, a hexagonal prism-shaped honeycomb block 309 is used instead of the block 106 in the first embodiment, the apparatus table unit 107 is divided by honeycomb cells, and the tip of the automatic support unit 105 is further separated. The shape 105a is a triangular pyramid shape. The shape of the block may be a cube or a shape in which a plurality of blocks are connected. Other configurations are the same as those of the first embodiment.

  In the three-dimensional modeling method, 3D-CAD data is first converted into slice data, and the arrangement of the honeycomb blocks 309 is calculated from the slice data. Only the front end portion 105a of the automatic support unit 105 is protruded in advance to the center of the honeycomb grid of the device table unit 107, and the operation of stacking the layers one by one while holding the honeycomb block 309 by the chuck unit 102 is repeated. At this time, if the lower side of the modeled object (rotating shaft target) 301 is hollow, the automatic support unit 105 is automatically controlled to proceed with modeling.

  When the lamination of the honeycomb blocks 309 is completed, the atmosphere temperature control unit 101 and the automatic support unit 105 are heated to melt the surface low melting point material 202, and then the air is blown from the atmosphere temperature control unit 101 and cooled by the automatic support unit 105. Thus, the honeycomb blocks 309 are bonded to each other.

Then, the hollow automatic support part 105 is accommodated, and the shaped article 301 is formed by cutting by the cutting part 103.
Finally, the automatic support part 105 in contact with the modeled object 301 is accommodated, and then the modeled object is removed by pushing it up by 0.2 mm or more.

Even in such a configuration, as in the first embodiment, since the modeled object is bonded by surface contact between the blocks 106, the impact strength can be improved as compared with the conventional method. Moreover, since it has the automatic support part 105, even if a hollow part exists under a molded article during lamination, the structure can be maintained without falling down due to its own weight. Moreover, the automatic support part 105 can be used also for removal of a modeling object after modeling completion. The three-dimensional modeling apparatus according to the second embodiment can hold the block firmly in the rotation direction with the automatic support unit 105 as an axis, and thus is effective in producing a rotationally symmetric shaped model.
(Embodiment 3)
FIG. 11 to FIG. 13 illustrate blocks of a plurality of types used in the third embodiment. In the first and second embodiments, the three-dimensional modeling apparatus using one type of block has been described. The third embodiment is the same as the first embodiment except that a plurality of types of blocks are used.

  In the three-dimensional modeling apparatus and the three-dimensional modeling method according to the third embodiment, when creating block arrangement data from slice data, block arrangement data for arranging blocks having a plurality of shapes so as to minimize the number of blocks in each layer is created. To do.

In this way, by using a plurality of types of blocks and efficiently arranging the blocks, the number of blocks to be used can be reduced, so that the time required for stacking can be shortened.
Note that the temperature rise when the blocks shown in the first, second, and third embodiments are bonded may be performed by blowing warm air or raising the ambient temperature. The temperature may be lowered by blowing cold air or lowering the ambient temperature, or may be cooled by stopping heating without providing a cooling device.

  Moreover, although the automatic support part 105 demonstrated to the example the structure which moves up and down, the structure fixed may be sufficient. When the automatic support unit 105 is configured to move up and down, it is useful, for example, it becomes easy to take out a modeled object.

  In the above description, the block convex portion is provided on the upper surface and the block concave portion is provided on the lower surface. However, the block may be provided with the block convex portion and the block concave portion on the surrounding surface. By providing the block convex portions and the block concave portions on the peripheral surface of the block, it is possible to bond not only the stacking direction but also the blocks adjacent in the lateral direction, and the impact strength can be further improved.

  INDUSTRIAL APPLICABILITY The present invention can accurately manufacture a modeled object manufactured by three-dimensional modeling, and is useful for a three-dimensional modeling apparatus and a three-dimensional modeling method that process a modeled object to manufacture a modeled object.

DESCRIPTION OF SYMBOLS 101 Atmospheric temperature control part 102 Chuck part 103 Cutting part 104 Multi-axis robot part 105 Automatic support part 105a Tip part of automatic support part 105b Shaft part of automatic support part 105c Drive part of automatic support part 106 Block 107 Device table part 108 3D Modeling device 109 Atmospheric temperature in device 110 Block supply unit 111 Block projection 112 Block recess 113 Hollow 201 Modeling object 202 Low melting point material 203 High melting point material 301 Modeling object (target of rotating shaft)
309 Honeycomb block 401 Support temperature control unit 402 High thermal conductivity material 403 Modeling object (surface)
404 Modeling object (inside)
TA Temperature at which the low melting point material melts TB Temperature at which the high melting point material melts

Claims (8)

A three-dimensional modeling apparatus for manufacturing a modeled object by three-dimensionally modeling a modeled object composed of a plurality of blocks,
An apparatus table in which the blocks are arranged to be a modeling area;
An automatic support unit configured to fix the block provided on the device table;
A block supply device for supplying the block prepared in advance on the device table and arranging the object to be shaped;
A processing device for processing the supplied workpiece,
A temperature control unit for heating the block, and the block includes a block main body, a block convex portion formed of a material having a melting point lower than that of the block main body, and a block concave portion formed in the block main body, The block convex portion of one block is inserted into the other block concave portion in a stacked state of blocks,
The three-dimensional modeling apparatus, wherein the automatic support unit is configured to fix the block in a state where a tip is inserted into the block recess.   The three-dimensional modeling apparatus according to claim 1, wherein the block has a rectangular parallelepiped shape, and the block convex portion and the block concave portion have a quadrangular pyramid shape.   The three-dimensional modeling apparatus according to claim 1, wherein the block has a hexagonal prism shape, and the block convex portion and the block concave portion have a triangular pyramid shape.   The three-dimensional modeling apparatus according to any one of claims 1 to 3, further comprising an automatic support unit driving unit that houses the automatic support unit in the device table and protrudes from the device table. .   The three-dimensional modeling apparatus according to any one of claims 1 to 4, further comprising a cooling unit that cools the block.   The three-dimensional modeling apparatus according to any one of claims 1 to 5, wherein the object to be modeled is configured by the blocks having a plurality of types of shapes. A three-dimensional modeling method for manufacturing a modeled object by three-dimensionally modeling a modeled object composed of a plurality of blocks arranged on an apparatus table including an automatic support unit,
The block is composed of a block main body, a block convex portion formed of a material having a melting point lower than that of the block main body, and a block concave portion formed in the block main body.
Determining the arrangement of the blocks corresponding to the shape of the shaped object;
Placing the block according to the determined placement such that the automatic support portion or the block convex portion is inserted into the block concave portion of the upper block;
Heating the block to melt the block protrusions;
Forming the object to be shaped by bonding the blocks stacked by cooling the block protrusions;
A three-dimensional modeling method comprising: three-dimensionally modeling the modeled object and manufacturing the modeled object. After manufacturing the modeled object,
The three-dimensional modeling method according to claim 7, further comprising a step of projecting the automatic support portion in a direction of the modeled object.

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