Gas feeding system, modeling box, and laminate modeling method

Abstract

To provide a gas feeding system capable of reducing a labor required for a cleaning work of a sand mold.SOLUTION: A gas feeding system 11 comprises a modeling box 12 and a gas feeding device 13. Inside the modeling box 12, a sand mold T is modeled by a sand S layered by a 3D printer 10 and a resin R discharged by the 3D printer 10 to bind the sand S. The gas feeding device 13 feeds gas to the inside of the modeling box 12.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a gas supply system, a molding box, and a laminated molding method.

Background Art

[0002] In recent years, it has been disclosed that a sand mold used in casting is formed by a laminated molding method using a sand mold 3D printer (see, for example, Patent Document 1).

[0003] In the sand mold 3D printer shown in Patent Document 1, for example, a curing agent as a catalyst for curing a resin is kneaded into sand, and a resin is discharged onto the sand kneaded with the curing agent to create a desired sand mold. The created sand mold is taken out of the sand and the excess sand adhering thereto is removed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, as the shape of the sand mold becomes more complex, the cleaning work for removing the sand adhering to the sand mold has been extremely laborious.

[0006] An object of the present disclosure is to provide a gas supply system, a molding box, and a laminated molding method capable of reducing the labor required for cleaning the sand mold.

Means for Solving the Problems

[0007] The gas supply system according to the first aspect of the present disclosure is a gas supply system used in a stereolithography apparatus, and includes a modeling box and a gas supply device. The modeling box has a desired shape formed inside by a base material laminated by a 3D printer and a binder discharged by the 3D printer to bond the base material. The gas supply device supplies gas inside the modeling box.

[0008] The modeling box according to the second aspect of the present disclosure is a modeling box used in a stereolithography apparatus, in which a desired shape is formed by a base material laminated by a 3D printer and a binder discharged by the 3D printer to bond the base material, and has a gas inlet through which gas is fed into the inside from a gas supply device.

[0009] The stereolithography method according to the third aspect of the present disclosure includes a modeling step and a gas supply step. In the modeling step, while laminating a base material inside a modeling box by a 3D printer, the base material is bonded with a binder so as to have a desired shape. In the gas supply step, gas is supplied inside the modeling box in which the base material is laminated.

Advantages of the Invention

[0010] According to the present disclosure, it is possible to provide a gas supply system, a modeling box, and a stereolithography method capable of reducing the labor required for cleaning a sand mold.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7A

Figure 7B

Figure 7C

Figure 7D

Figure 7E

Figure 7F

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0012] The gas supply system according to the embodiment of the present disclosure will be described below with reference to the drawings. The gas supply system of the present embodiment is used in a sand mold 3D printer system.

[0013] (Sand mold 3D printer system) FIG. 1 is a schematic diagram showing a sand mold 3D printer system, representing the state during the formation of a sand mold T. The sand mold 3D printer system 1 includes a 3D printer 10 (an example of a layer forming apparatus) and a gas supply system 11. The gas supply system 11 includes a forming box 12 and a gas supply device 13. The 3D printer 10 creates a sand mold T inside the forming box 12. The gas supply system 11 supplies air into the sand S in which the sand mold T is formed.

[0014] (3D printer 10) The 3D printer 10 includes a recoater 21, a printer head 22, and a lifter 23. The recoater 21 moves on the forming box 12 and stacks sand S (an example of a base material) inside the forming box 12. When a layer of sand S is spread over the bottom surface 32 of the forming box 12 by the recoater 21, the bottom surface 32 is lowered, and a layer of sand S is spread over that layer by the recoater 21, and the bottom surface 32 is lowered. By repeating this, the sand S can be stacked inside the forming box 12. The sand S is coated with a curing agent. In this embodiment, the surface of the sand S is coated with a resin, and the surface of the resin is coated with a curing agent. As the resin, for example, a furan resin can be used. Note that, not limited to coating, sand mixed with a curing agent may also be used.

[0015] The printer head 22 moves on the forming box 12 and discharges a resin R (an example of a binder) toward the spread sand S so as to have a desired shape. The resin R undergoes a dehydration reaction when it comes into contact with the curing agent and binds the sand S. As the resin R, for example, a furan resin can be used. By discharging the resin R when a layer of sand S is formed by the recoater 21, a sand mold having a desired shape can be created in the sand.

[0016] The bottom surface portion 32 of the shaping box 12 is disposed on the lifter 23. The lifter 23 is configured to be movable in the vertical direction. As the moving mechanism for the lifter 23 to move in the vertical direction, a rack and pinion, a piston, or the like can be used. Further, for the moving mechanism, a servo motor, for example, can be used as a drive source.

[0017] (Shaping box 12) FIG. 2 is a view showing the appearance of the shaping box 12. Sand S is laminated on the shaping box 12 by the recoater 21. In the shaping box 12, a sand mold having a desired shape is created by discharging the resin R from the printer head 22.

[0018] The shaping box 12 has a box shape with an open upper side. The shaping box 12 has a side surface portion 31 and a bottom surface portion 32. The side surface portion 31 has a first side surface 41, a second side surface 42, a third side surface 43, and a fourth side surface 44. The main surfaces of the first side surface 41, the second side surface 42, the third side surface 43, and the fourth side surface 44 are arranged parallel to the vertical direction. The first side surface 41 and the second side surface 42 are arranged opposite to each other. The third side surface 43 and the fourth side surface 44 are arranged opposite to each other. In plan view, the third side surface 43 and the fourth side surface 44 are arranged perpendicular to the first side surface 41 and the second side surface 42. The third side surface 43 connects one end of the first side surface 41 and one end of the second side surface 42. The fourth side surface 44 connects the other end of the first side surface 41 and the other end of the second side surface 42. In the present embodiment, in plan view, the lengths of the first side surface 41 and the second side surface 42 are shorter than the lengths of the third side surface 43 and the fourth side surface 44, but the present invention is not limited thereto. In this specification, perpendicular does not mean a strict meaning, includes errors, and includes those recognized as perpendicular in social common sense. Parallel does not mean a strict meaning, includes errors, and includes those recognized as parallel in social common sense. Horizontal does not mean a strict meaning, includes errors, and includes those recognized as horizontal in social common sense.

[0019] The bottom surface portion 32 is disposed inside the side surface portion 31. The bottom surface portion 32 is configured to be movable in the vertical direction with respect to the side surface portion 31. It is disposed inside the first side surface 41, the second side surface 42, the third side surface 43, and the fourth side surface 44. The bottom surface portion 32 is configured to be movable in the vertical direction with respect to the first side surface 41, the second side surface 42, the third side surface 43, and the fourth side surface 44. The bottom surface portion 32 is disposed on the lifter 23 and is moved in the vertical direction by the lifter 23.

[0020] FIG. 3 is a perspective view showing the internal configuration of the shaping box 12. In FIG. 3, a state where the first side surface 41 and the third side surface 43 are removed from the shaping box 12 is shown. FIG. 4 is a side view showing the internal configuration of the shaping box 12. In FIG. 4, a state where the third side surface 43 is removed from the shaping box 12 is shown.

[0021] The bottom surface portion 32 has a filter portion 45, a lower surface 46, a plurality of first partition plates 47, and a plurality of second partition plates 48. The filter portion 45 constitutes the bottom surface on which the sand S of the shaping box 12 is spread. The filter portion 45 is indicated by a dotted line in FIG. 3.

[0022] FIG. 5 is a diagram for explaining the configuration of the filter portion 45. The filter portion 45 has a plate 51 and a mesh 52 (an example of a filter). The plate 51 has a plurality of through portions penetrating in the plate thickness direction. The shape of the through holes is circular in FIG. 5, but it is not limited to a circular shape and may be, for example, a square shape. For example, the mesh 52 is placed on the upper surface of the plate 51. The mesh 52 does not allow the sand S to pass through, but allows the gas described later to pass through. The plate 51 is disposed to reinforce the mesh 52 so as to support the weight of the sand S. As shown in FIG. 3, a gas supply space 49 is formed below the filter portion 45 and adjacent to the filter portion 45 in the shaping box 12. The filter portion 45 is disposed on the path through which the air from the gas supply device 13 described later is fed into the inside of the shaping box 12. The inside of the shaping box 12 is a space surrounded by the side surface portion 31 and the bottom surface portion 32.

[0023] The following surface 46 is plate-shaped and is disposed below the filter section 45. The following surface 46 is disposed at a predetermined interval from the filter section 45. The gas supply space 49 is a space between the following surface 46 and the filter section 45 and is surrounded by the side surface portion 31.

[0024] The plurality of first partition plates 47 and the plurality of second partition plates 48 divide the gas supply space 49 into a plurality of spaces 49a in a plan view. The first partition plates 47 and the second partition plates 48 are arranged such that their main surfaces are parallel to the vertical direction. In the figure, reference numerals are attached only to some of the spaces 49a. The plurality of first partition plates 47 are arranged side by side in a direction parallel to the first side surface 41 and the second side surface 42. The plurality of first partition plates 47 are disposed on the following surface 46. Each first partition plate 47 is disposed perpendicular to the first side surface 41 and the second side surface 42. Each first partition plate 47 is disposed from the first side surface 41 to the second side surface 42.

[0025] The plurality of second partition plates 48 are arranged side by side in a direction parallel to the third side surface 43 and the fourth side surface 44. The plurality of second partition plates 48 are disposed on the following surface 46. Each second partition plate 48 is disposed perpendicular to the third side surface 43 and the fourth side surface 44. Each second partition plate 48 is disposed from the third side surface 43 to the fourth side surface 44.

[0026] The first partition plates 47 and the second partition plates 48 are arranged in a lattice pattern, and the gas supply space 49 is divided into a plurality of spaces 49a. In FIG. 3, as an example, the gas supply space 49 is divided into 16 spaces. The space between the first side surface 41 and the second side surface 42 is divided into four spaces by the second partition plate 48, and the space between the third side surface 43 and the fourth side surface 44 is divided into four spaces by the first partition plate 47.

[0027] A plate 51 is disposed at the upper ends of these first partition plates 47 and second partition plates 48, and a mesh 52 is disposed on the plate 51.

[0028] (Gas supply device 13) As shown in FIG. 3, the gas supply device 13 includes a plurality of air pipes 61 (an example of a plurality of gas pipes), a plurality of couplers 62, a plurality of air hoses 63, a plurality of air adjustment units 64, and an air pump 65. The plurality of air pipes 61 are arranged in the gas supply space 49. The plurality of air pipes 61 are arranged side by side in a direction parallel to the first side surface 41 and the second side surface 42. In the present embodiment, four air pipes 61 are arranged.

[0029] Each air pipe 61 has a main pipe 61a and a branch pipe 61b. The main pipe 61a is arranged along a direction parallel to the third side surface 43 and the fourth side surface 44. The main pipe 61a passes through a notch formed at the lower end of the second partition plate 48. The main pipe 61a is arranged so as to pass through four spaces 49a formed from the first side surface 41 toward the second side surface 42. The end of the main pipe 61a on the first side surface 41 side penetrates the lower surface 46 and is connected to a coupler 62 arranged below the lower surface 46. The end of the main pipe 61a on the second side surface 42 side is closed.

[0030] The branch pipe 61b protrudes horizontally from the main pipe 61a. The branch pipe 61b extends parallel to the second side surface 42. An air discharge port 61c is formed at the tip of the branch pipe 61b. For example, in FIG. 3, three branch pipes 61b are arranged in one space 49a, and three discharge ports 61c are arranged. In FIGS. 3 and 4, the main pipe 61a, the branch pipe 61b, and the discharge port 61c are not all labeled, but only some of them are labeled.

[0031] The plurality of couplers 62 are fixed to the lower surface 46. Each coupler 62 is connected to each air pipe 61. Each air hose 63 is detachably connected to each coupler 62. The air hose 63 connects between the air pump 65 and the coupler 62.

[0032] Each air adjustment unit 64 is arranged on each air hose 63. The air adjustment unit 64 includes a speed controller for adjusting the air flow rate and a regulator for adjusting the air pressure. The air flow rate and pressure of the air supplied to each air pipe 61 through the air hose 63 are adjusted by the air adjustment unit 64.

[0033] The air pump 65 supplies air to the air pipe 61 through the air hose 63. The air pump 65 is connected to a plurality of air hoses 63. For example, one air pump 65 supplies air to a plurality of air hoses 63. Note that the present invention is not limited to this, and an air pump 65 may be provided for each of the plurality of air hoses 63.

[0034] By driving the air pump 65, air is supplied to the air pipe 61 through each air hose 63, and the air is discharged horizontally from the discharge port 61c. The air discharged from the air pipe 61 moves upward where the filter unit 45 through which air can pass is arranged, and is supplied toward the stacked sand S.

[0035] Since the bonding of the sand S by the resin is a dehydration reaction, moisture is generated. Also, there is moisture in the workplace due to humidity. Due to such moisture, the sand S adheres to the sand mold T, and conventionally it has been difficult to clean. However, in the present embodiment, by supplying air into the sand S in which the sand mold T is formed, the sand S can be dried. Therefore, the force of the dehydration reaction and the moisture of the humidity causing the sand to adhere to the sand mold T is reduced, and it becomes easier to remove excess sand from the created sand mold.

[0036] (Laminated manufacturing method) Next, a laminated manufacturing method using the sand mold 3D printer system 1 of the present embodiment will be described. FIG. 6 is a flowchart for explaining the laminated manufacturing method using the sand mold 3D printer system 1 of the present embodiment. FIGS. 7A to 7F are schematic diagrams for explaining the laminated manufacturing method using the sand mold 3D printer system 1 of the present embodiment.

[0037] First, in step S11, as shown in FIG. 7A, the molding box 12 is installed in the 3D printer 10. At this time, the bottom surface portion 32 of the molding box 12 is disposed on the lifter 23.

[0038] Next, in step S12, as shown in FIG. 7B, the lifter 23 moves upward, and the bottom surface portion 32 of the molding box 12 moves upward with respect to the side surface portion 31. The bottom surface portion 32 rises to near the upper end of the side surface portion 31.

[0039] Next, in step S13 (an example of the molding step), as shown in FIG. 7C, the 3D printer 10 performs sand mold molding. The recoater 21 spreads the sand S on the filter portion 45 of the bottom surface portion 32, and the resin R is discharged from the printer head 22 toward the sand S spread thereon according to the shape of the sand mold. After the discharge from the printer head 22, the lifter 23 moves downward slightly, causing the bottom surface portion 32 to also move downward. Then, the recoater 21 spreads more sand on the sand S spread previously, and the resin is discharged from the printer head 22. By repeating these operations, a sand mold T of a desired shape is molded in the sand S.

[0040] Next, in step S14, as shown in FIG. 7D, the molding box 12 is taken out from the 3D printer 10.

[0041] Next, in step S15 (an example of the gas supply step), as shown in FIG. 7E, an air hose 63 is connected to each of the couplers 62, and the air pump 65 is driven to discharge air from the air pipe 61 and supply air to the sand S inside the molding box 12. Thereby, the sand S is dried and the adhesion of the sand to the sand mold T is reduced. Note that the supply of air may end when the humidity inside the sand S reaches a predetermined threshold value or less using a humidity sensor, or the time required to reach a desired humidity may be obtained in advance through experiments and the supply may end when that time has elapsed. When the operator stops the air pump 65, the supply of air stops.

[0042] Next, in step S16, as shown in FIG. 7F, the sand mold T is taken out from the molding box 12.

[0043] Next, in step S17, the molded sand mold T is cleaned. FIGS. 8(a) to (c) are diagrams showing the cleaning process. FIG. 8(a) shows the sand mold T taken out from the molding box 12. FIG. 8(b) is a diagram showing the sand mold T in a roughly cleaned state. FIG. 8(c) is a diagram showing the sand mold T in a finish-cleaned state.

[0044] In this embodiment, since the sand S is dried by the gas supply device 13, the sand mold T taken out from the molding box 12 can be lightly tapped, for example, with a hammer to give an impact, or scraped by hand to break up the adhered sand as shown in FIG. 8(b). If the sand S is not dried, it is difficult for the sand to collapse, so an operation using a brush or the like to remove the adhered part is required.

[0045] Next, finish cleaning by air blowing is performed from the state of FIG. 8(b), and the sand mold T shown in FIG. 8(c) is created. Also in the finish cleaning, since the sand S is easily collapsible, the working time can be shortened.

[0046] As described above, the cleaning work when creating the sand mold T can be easily performed.

[0047] (Features, etc.) The gas supply system 11 of this embodiment includes a molding box 12 and a gas supply device 13. In the molding box 12, the sand mold T is formed by the sand S laminated by the 3D printer 10 and the resin R discharged by the 3D printer 10 to bond the sand S. The gas supply device 13 supplies gas inside the molding box 12. Thereby, since the sand S of the sand mold T formed can be dried, the labor required for the cleaning work of the sand mold T taken out from the sand S can be reduced.

[0048] The gas supply system 11 of this embodiment is disposed on the bottom surface of the shaping box 12 and has a filter portion 45 that allows gas to pass through without allowing sand S to pass through. As a result, since air flows from below to above, air can be supplied toward the sand S.

[0049] In the gas supply system 11 of this embodiment, a gas supply space 49 is formed in the shaping box 12 adjacent to the filter portion 45. The gas supply device 13 has a plurality of air pipes 61 disposed in the gas supply space 49. The plurality of air pipes 61 include a plurality of discharge ports 61c that discharge air. By disposing the plurality of air pipes 61 in the gas supply space 49 in this way, air can be evenly supplied over the entire sand S stacked in the shaping box 12.

[0050] In the gas supply system 11 of this embodiment, the gas supply space 49 is partitioned into a plurality of spaces 49a, and a plurality of discharge ports 61c are provided in each space 49a. Thereby, air can be evenly supplied.

[0051] (Other embodiments) Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention.

[0052] (A) In the above embodiment, the gas supply device 13 supplies air to the sand S, but it is not limited to air and may be any gas.

[0053] (B) In the above embodiment, the filter portion 45 corresponds to an example of the gas inlet portion, but it is not limited to the filter portion 45 as long as gas can flow into the sand S. For example, a nozzle for supplying gas to the sand S may be inserted to serve as the gas inlet portion, but the filter portion 45 of this embodiment is more preferable because it can more easily supply gas evenly to the entire sand S.

[0054] (C) In the above embodiment, the filter unit 45 is disposed on the bottom surface of the modeling box 12, but it may not be limited to the bottom surface and may be provided on the side surface.

[0055] (D) In the gas supply system 11 of the above embodiment, when the humidity reaches a predetermined threshold value or when a predetermined elapsed time has passed, the supply of air is terminated. However, the present invention is not limited to this, and the supply of air may be automatically stopped. FIG. 9 is a configuration diagram showing a gas supply system 11'. The gas supply system 11' includes a humidity sensor 71 and a controller 72. The humidity sensor 71 measures the humidity in the sand S. The controller 72 includes a memory such as a RAM and a ROM, and a processor such as a CPU. The controller 72 may include an auxiliary storage device such as an SSD or an HDD. The controller 72 records a program and data for controlling the air pump 65. The controller 72 receives the detection value from the humidity sensor 71. When the detection value of the humidity sensor 71 reaches a predetermined threshold value or less, the controller 72 stops the air pump 65. Instead of stopping the air pump 65, the controller 72 may notify the operator that the humidity has reached a predetermined threshold value or less using a notification unit or the like. Examples of the notification unit include a display or a speaker.

[0056] (E) In the gas supply system 11 of the above embodiment, one main pipe 61a is disposed in one space 49a, but a plurality of main pipes 61a may be disposed, and branch pipes 61b may be provided from each main pipe 61a. Further, in the above embodiment, the main pipe 61a is disposed parallel to the third side surface 43, but it may be disposed parallel to the second side surface 42, and the direction of the arrangement is not limited.

[0057] (F) In the gas supply system 11 of the above embodiment, the discharge port 61c opens in the horizontal direction, but it may open upward toward the filter unit 45, and the direction of the opening is not limited.

[0058] (G) In the gas supply system 11 of the above embodiment, three discharge ports 61c are provided in one space 49a, but this is not limitative, and the number of discharge ports 61c may vary depending on the space 49a.

[0059] (H) In the gas supply system 11 of the above embodiment, the sizes of the spaces 49a are generally the same, but they may be different. Also, the number of discharge ports 61c may vary depending on the size of the space 49a.

[0060] (I) In the gas supply system 11 of the above embodiment, the branch pipe 61b protrudes from the main pipe 61a, but this is not limitative, and for example, the discharge port 61c may be formed in the main pipe 61a.

[0061] (J) In the above embodiment, the bottom surface portion 32 of the modeling box 12 is raised and lowered by the lifter 23 of the 3D printer 10, but the modeling box 12 may have a lifting mechanism for the bottom surface portion 32, and the bottom surface portion 32 may be raised and lowered by the lifting mechanism of the modeling box 12 itself.

[0062] (K) The filter portion 45 of the above embodiment has a configuration in which the mesh 52 is disposed on the upper surface of the plate 51, but this is not limitative, and for example, a configuration in which the mesh 52 is sandwiched between two plates 51 may be used. From the viewpoint of ensuring strength, the configuration in which the mesh 52 is sandwiched between two plates 51 is more preferable.

[0063] (L) In the above embodiment, the plate 51 is a plate-like member in which a through portion is formed, but this is not limitative, and it may be a member formed by welding members such as plates or bars.

[0064] (M) In the above-described embodiment, the same number of discharge ports 61c are provided in each space 49a. However, the present invention is not limited to this, and the number of discharge ports 61c may differ depending on the space 49a. For example, the number of discharge ports 61c in the space 49a where the flow rate is large near the air pump 65 may be reduced compared to the space 49a far from the air pump 65. Thereby, air can be fed more evenly throughout the entire filter section 45. Further, the branch pipe 61b of the space 49a where the flow rate is large near the air pump 65 may be made longer than the space 49a far from the air pump 65, or the diameter of the discharge port 61c of the space 49a where the flow rate is large near the air pump 65 may be made smaller than the space 49a far from the air pump 65. Thereby, air can be fed more evenly throughout the entire filter section 45.

[0065] (N) In the above-described embodiment, after the modeling box 12 is taken out from the 3D printer 10, air is fed by the gas feeding device 13 to perform a drying operation. However, air may be fed during the modeling by the 3D printer 10 to perform a drying operation.

[0066] (O) In the above-described embodiment, drying is performed by feeding air to reduce the adhesion force of the sand. However, the sand may be fluidized by increasing the air pressure, dried, and the adhered portion of the sand may be directly broken by the high-pressure air.

Industrial Applicability

[0067] According to the gas feeding system and the additive manufacturing method of the present disclosure, it is possible to reduce the labor required for the cleaning work of the sand mold, and it is useful as a sand mold 3D printer system or the like.

Explanation of Reference Numerals

[0068] 10: 3D printer 11: Gas feeding system 12: Modeling box 13: Gas feeding device S: Sand T: Sand mold R: Resin

Claims

1. A gas supply system used in a layered manufacturing apparatus, a modeling box in which a desired shape is formed inside by a base material laminated by a 3D printer and a binder discharged by the 3D printer to bond the base material, and a gas supply device that supplies gas inside the modeling box. A gas supply system.

2. The gas supply system according to claim 1, further comprising a gas inlet portion disposed on a path through which the gas from the gas supply device is fed into the inside of the modeling box.

3. The gas supply system according to claim 2, wherein the gas inlet portion is disposed on at least one surface of the modeling box and has a filter portion that allows the gas to pass through without passing the base material.

4. The gas supply system according to claim 3, wherein the filter portion also serves as the bottom surface of the modeling box.

5. A gas supply space adjacent to the filter portion is formed in the modeling box, the gas supply device has a gas pipe disposed in the gas supply space, and the gas pipe includes a discharge port for discharging the gas. The gas supply system according to claim 3.

6. A plurality of the gas pipes are arranged in the gas supply space, and each of the gas pipes is provided with a plurality of the discharge ports. The gas supply system according to claim 5.

7. The gas supply space is partitioned into a plurality of spaces, and each of the spaces is provided with a plurality of the discharge ports. The gas supply system according to claim 6.

8. The filter portion includes a plate having a plurality of through portions penetrating in the plate thickness direction, and a filter that allows the gas to pass through without passing the base material. The gas supply system according to claim 3.

9. The gas supply system according to claim 1, wherein the base material contains sand.

10. A modeling box used in a layered manufacturing apparatus, in which a desired shape is formed by a base material laminated by a 3D printer and a binder discharged by the 3D printer to bond the base material, the modeling box having a gas inlet portion through which gas is fed into the inside from a gas supply device.

11. A modeling step of bonding the base material with a binder to form a desired shape while laminating the base material inside the modeling box by a 3D printer, ​ ​ ​ ​ A gas supply step of supplying gas to the inside of the shaping box on which the base material is laminated, and A laminated shaping method.

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