Apparatus for additive manufacturing of structural member and method for manufacturing structural member

Abstract

To provide a structural member additive manufacturing apparatus and a structural member manufacturing method which can construct a structural member such as a concrete member in a plurality of colors.SOLUTION: A structural member additive manufacturing apparatus 1 that discharges hydraulic mixtures 2 of a plurality of different colors, and manufactures a structural member of a plurality of colors includes: a hopper 5 to which the hydraulic mixtures 2 are charged; a nozzle 6 for discharging the hydraulic mixtures 2; a pump 8 for conveying the hydraulic mixtures 2 charged to the hopper 5 to the nozzle 6 under pressure; and a control part 9 for switching the hydraulic mixture 2 discharged by the nozzle 6 out of the hydraulic mixtures 2 of the plurality of different colors, and switching the color of the hydraulic mixture 2 discharged from the nozzle 6.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an additive manufacturing apparatus for a structural member and a method for producing a structural member. [Background technology]

[0002] Known methods for producing concrete components include pouring concrete material into a formwork and layering concrete material ejected from a nozzle using an additive manufacturing device such as a 3D printer (see, for example, Patent Document 1). When coloring a concrete member, a coloring agent (pigment) is added to the concrete material, and the colored concrete material is poured into a formwork. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4527107 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when producing a multi-colored concrete component, there is a problem in that concrete materials of different colors will mix together if they are poured into the same formwork.

[0005] Therefore, an object of the present invention is to provide an additive manufacturing apparatus for a structural member and a method for manufacturing a structural member that can construct a structural member such as a concrete member in multiple colors. [Means for solving the problem]

[0006] In order to achieve the above object, the additive manufacturing device for a structural member according to the present invention is an additive manufacturing device for a structural member that produces structural members of multiple colors by discharging hydraulic mixtures of multiple different colors, and includes a hopper into which the hydraulic mixture is input, a nozzle that discharges the hydraulic mixture, a pump that pressure-feeds the hydraulic mixture input into the hopper to the nozzle, and a control unit that switches the hydraulic mixture discharged by the nozzle among the hydraulic mixtures of the multiple different colors to switch the color of the hydraulic mixture discharged from the nozzle. The hopper is configured to receive one of the hydraulic mixtures of the plurality of different colors, and the control unit switches the hydraulic mixture to be fed to the hopper from the hydraulic mixtures of the plurality of different colors to switch the color of the hydraulic mixture to be discharged from the nozzle. . In order to achieve the above object, the additive manufacturing device for a structural member according to the present invention is an additive manufacturing device for a structural member that produces structural members of multiple colors by discharging hydraulic mixtures of multiple different colors, and includes a hopper into which the hydraulic mixture is input, a nozzle that discharges the hydraulic mixture, a pump that pressure-feeds the hydraulic mixture input into the hopper to the nozzle, and a control unit that switches the hydraulic mixture discharged by the nozzle among the hydraulic mixtures of the multiple different colors to switch the color of the hydraulic mixture discharged from the nozzle. The hydraulic mixture is discharged from the nozzle by switching the color of the colorant added by the colorant adding unit, which is provided between the hopper and the nozzle and adds a colorant to the hydraulic mixture that is pumped from the hopper to the nozzle. The control unit switches the color of the hydraulic mixture discharged from the nozzle by switching the color of the colorant added by the colorant adding unit. .

[0007] In addition, a method for manufacturing a structural member according to the present invention uses the additive manufacturing apparatus for a structural member described above to manufacture a structural member in multiple colors.

[0008] In the present invention, the color of the hydraulic mixture discharged from the nozzle can be changed by the control unit, so that hydraulic mixtures of different colors do not mix together, and thus structural members such as concrete members can be constructed in multiple colors.

[0009] In addition, in the additive manufacturing device for a structural member according to the present invention, the hopper is configured to receive one of the hydraulic mixtures of the plurality of different colors, and the control unit is configured to switch the hydraulic mixture fed to the hopper from the hydraulic mixtures of the plurality of different colors to switch the color of the hydraulic mixture discharged from the nozzle. do.

[0010] With this configuration, hydraulic mixtures of different colors do not mix together, so structural members such as concrete members can be constructed using the colors of the hydraulic mixtures placed in the hopper.

[0011] In addition, the additive manufacturing device for structural components according to the present invention may have a hydraulic mixture manufacturing unit that manufactures the hydraulic mixture to be poured into the hopper, and the control unit may be configured to switch the color of the hydraulic mixture discharged from the nozzle by switching the color of the hydraulic mixture manufactured in the hydraulic mixture manufacturing unit.

[0012] By adopting such a configuration, it is possible to prevent hydraulic mixtures of different colors from being mixed together, and it is also possible to totally control the hydraulic mixture from its production to its discharge.

[0013] In addition, the additive manufacturing device for a structural member according to the present invention has a colorant addition unit that is provided between the hopper and the nozzle and adds a colorant to the hydraulic mixture that is pressure-fed from the hopper to the nozzle, and the control unit is configured to switch the color of the hydraulic mixture discharged from the nozzle by switching the color of the colorant added by the colorant addition unit. do.

[0014] By adopting such a configuration, it is possible to prevent hydraulic mixtures of different colors from being mixed together, and it is also possible to totally control the hydraulic mixture from its production to its discharge.

[0015] In addition, in the additive manufacturing device for structural components according to the present invention, a plurality of the hoppers and a plurality of the pumps may be provided, hydraulic mixtures of different colors may be loaded into the plurality of hoppers, and the hydraulic mixtures may be pressure-fed to the nozzles by the pumps, and the control unit may be configured to switch the color of the hydraulic mixture discharged from the nozzles by switching the hydraulic mixture pressure-fed to the nozzles.

[0016] By adopting such a configuration, it is possible to prevent hydraulic mixtures of different colors from being mixed together, and it is also possible to totally control the hydraulic mixture from its production to its discharge.

[0017] In addition, in the additive manufacturing device for structural components according to the present invention, a plurality of hoppers, nozzles and pumps are provided, hydraulic mixtures of different colors are respectively loaded into the plurality of hoppers and pumped to the nozzles by the pump, and the control unit switches the color of the hydraulic mixture discharged from the nozzles by switching the nozzles that discharge the hydraulic mixture.

[0018] With this configuration, different nozzles are used for different colors of hydraulic mixtures, so that mixing of different colors of hydraulic mixtures in the device can be reliably prevented. Also, the hydraulic mixture can be totally controlled from production to discharge. Effect of the Invention

[0019] According to the invention, structural members, such as concrete members, can be constructed in multiple colors. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic diagram showing an additive manufacturing apparatus for a structural component according to a first embodiment of the present invention. [Diagram 2] FIG. 4 is a schematic diagram showing an additive manufacturing apparatus for a structural component according to a second embodiment of the present invention. [Diagram 3] FIG. 13 is a schematic diagram showing an additive manufacturing apparatus for a structural component according to a third embodiment of the present invention. [Figure 4] FIG. 13 is a schematic diagram showing an additive manufacturing apparatus for a structural component according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] (First embodiment) Hereinafter, an additive manufacturing apparatus for a structural member and a manufacturing method for a structural member according to a first embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the additive manufacturing apparatus 1 for a structural member and the manufacturing method for a structural member according to the first embodiment are an apparatus and a method for manufacturing a structural member 11 of a plurality of colors by discharging hydraulic mixtures 2 of a plurality of different colors. The hydraulic mixture 2 is, for example, concrete, which becomes a concrete member (structural member 11) when hardened. The hydraulic mixture 2 is colored by adding a coloring agent 3 (pigment) to a material 21. The colored hydraulic mixture 2 is hardened to manufacture a colored structural member 11. Note that the colored hydraulic mixture 2 will have different shades even if it has the same color tone, depending on the amount of coloring agent 3 added. In the following, if the shades are different even if the color tone is the same, they will be considered as different colors.

[0022] The additive manufacturing apparatus 1 for structural members includes a hydraulic mixture production unit 4 for producing a hydraulic mixture 2, a hopper 5 into which the hydraulic mixture 2 produced in the hydraulic mixture production unit 4 is input, a nozzle 6 for discharging the hydraulic mixture 2, a hose 7 connecting the hopper 5 and the nozzle 6, a pump 8 for pressure-feeding the hydraulic mixture 2 input into the hopper 5 to the nozzle 6 via the hose 7, and a control unit 9. The hydraulic mixture 2 output from the nozzle 6 may be molded into the shape of a structural member 11 by being extruded and layered, or may be molded into the shape of a structural member 11 by being sprayed (sprayed). Note that the additive manufacturing apparatus 1 for structural members may not be provided with the hydraulic mixture production unit 4, and the hydraulic mixture 2 produced in another location may be input into the hopper 5.

[0023] The hydraulic mixture production unit 4 is configured to be able to produce hydraulic mixtures 2 of different colors. In this embodiment, the hydraulic mixture production unit 4 is configured to add a coloring agent 3 to the material 21 of the hydraulic mixture 2 to produce a hydraulic mixture 2 of a predetermined color. Note that the hydraulic mixture production unit 4 may add a coloring agent 3 to an uncolored hydraulic mixture produced without adding a coloring agent 3 to produce a hydraulic mixture 2 of a predetermined color.

[0024] The control unit 9 controls the color (type) and amount of colorant 3 added in the hydraulic mixture production unit 4, the amount of hydraulic mixture 2 produced in the hydraulic mixture production unit 4, the pump 8, and the amount and direction of the hydraulic mixture 2 discharged from the nozzle 6. The control unit 9 receives or inputs information on the color and shape of the structural member 11 to be produced, and performs the above controls based on this information. The additive manufacturing device 1 for structural components, like a 3D printer, automatically produces the structural component 11 from the production of the hydraulic mixture 2 to the discharge by the nozzle 6 in accordance with data on the color and shape of the structural component 11 to be produced.

[0025] The operation of the additive manufacturing apparatus 1 for a structural member according to the first embodiment (a method for manufacturing a structural member 11) will be described. Here, a structural member 11 with a striped pattern in which layers of two colors are arranged alternately is manufactured. One of the two colors is designated as a first color, and the other is designated as a second color.

[0026] First, the hydraulic mixture 2 for forming one layer of a first color (first layer 111) is produced in the hydraulic mixture production unit 4. The control unit 9 controls the hydraulic mixture 2 produced in the hydraulic mixture production unit 4 to be the first color and in an amount for producing the first layer 111.

[0027] The hydraulic mixture 2 produced in the hydraulic mixture production unit 4 is fed into a hopper 5. The hydraulic mixture 2 fed into the hopper 5 is pressure-fed to a nozzle 6 via a hose 7 by a pump 8. The hydraulic mixture 2 pressure-fed to the nozzle 6 is discharged from the nozzle 6 to a predetermined position to form a first layer 111. A control unit 9 controls the hydraulic mixture 2 discharged from the nozzle 6 to have the shape of the first layer 111.

[0028] Next, the hydraulic mixture producing unit 4 produces the hydraulic mixture 2 for forming one layer of the second color (hereinafter referred to as the second layer 112). The control unit 9 controls so that the produced hydraulic mixture 2 is of the second color and is in an amount necessary to produce the second layer 112.

[0029] The hydraulic mixture 2 produced in the hydraulic mixture production unit 4 is fed into a hopper 5. The hydraulic mixture 2 fed into the hopper 5 is pressure-fed to a nozzle 6 by a pump 8. A second layer 112 is formed by the hydraulic mixture 2 discharged from the nozzle 6 overlapping the first layer 111. A control unit 9 controls the hydraulic mixture 2 discharged from the nozzle 6 to have the shape of the second layer 112.

[0030] One layer of a first color (third layer 113) overlapping the second layer 112 is formed in the same manner as the first layer 111, and one layer of a second color (fourth layer 114) overlapping the third layer 113 is formed in the same manner as the second layer 112, and this is repeated to produce the striped structural member 11.

[0031] Next, the actions and effects of the additive manufacturing apparatus 1 for a structural member and the method for manufacturing a structural member 11 according to the above-described first embodiment will be described. In the additive manufacturing apparatus 1 for a structural member and the manufacturing method for a structural member 11 according to the first embodiment, the control unit 9 can switch the color of the hydraulic mixture 2 discharged from the nozzle 6, so that hydraulic mixtures 2 of different colors are not mixed together. This allows the structural member 11, such as a concrete member, to be constructed in multiple colors.

[0032] Furthermore, in the additive manufacturing apparatus 1 for structural components according to the first embodiment, the hopper 5 is configured to receive one of a plurality of differently colored hydraulic mixtures 2, and the control unit 9 is configured to switch the hydraulic mixture 2 fed into the hopper 5 from the plurality of differently colored hydraulic mixtures 2, thereby switching the color of the hydraulic mixture 2 discharged from the nozzle 6.

[0033] With this configuration, hydraulic mixtures 2 of different colors do not mix together, so that structural members 11 such as concrete members can be constructed in a plurality of colors.

[0034] (Other embodiments) Next, other embodiments will be described based on the attached drawings. The same or similar components and parts as those in the first embodiment described above will be designated by the same reference numerals, and their description will be omitted. Only configurations that differ from the first embodiment will be described.

[0035] Second embodiment As shown in Fig. 2, in the additive manufacturing apparatus 1B for structural members according to the second embodiment, the hydraulic mixture manufacturing unit 4 manufactures a hydraulic mixture 22 to which no colorant 3 has been added (hereinafter referred to as uncolored hydraulic mixture 22). The uncolored hydraulic mixture 22 is charged into the hopper 5. In the additive manufacturing apparatus 1B for structural members according to the second embodiment, a colorant addition unit 31 is provided between the hopper 5 and the nozzle 6, which adds the colorant 3 to the uncolored hydraulic mixture 22 pressure-fed from the hopper 5 to the nozzle 6.

[0036] The control unit 9B of the second embodiment controls the color (type) and amount of colorant 3 added in the colorant adding unit 31 and the amount of colored hydraulic mixture 2, controls the amount of uncolored hydraulic mixture 22 produced in the hydraulic mixture producing unit 4, controls the pressure transfer of the pump 8, and controls the amount and direction of the hydraulic mixture 2 discharged from the nozzle 6.

[0037] The operation of the additive manufacturing apparatus 1B for a structural member according to the second embodiment (a method for manufacturing a structural member 11) will be described. In the second embodiment, a structural member 11 with a striped pattern in which layers of two colors are alternately arranged is manufactured, as in the first embodiment. One of the two colors is designated as a first color, and the other is designated as a second color.

[0038] First, the hydraulic mixture production unit produces an uncolored hydraulic mixture 22 for forming the structural member 11. The control unit 9B controls the amount of uncolored hydraulic mixture 22 produced in the hydraulic mixture production unit 4 to be the amount necessary for producing the structural member 11.

[0039] The uncolored hydraulic mixture 22 produced in the hydraulic mixture production unit 4 is fed into the hopper 5. The uncolored hydraulic mixture 22 fed into the hopper 5 is pumped to the nozzle 6 by the pump 8. In order to form the first layer 111, the uncolored hydraulic mixture 22 pumped from the hopper 5 to the nozzle 6 is colored a first color by adding a colorant 3 in the colorant adding unit 31. The control unit 9B controls the color (type) and amount of the colorant 3 added in the colorant adding unit 31 and the amount of the uncolored hydraulic mixture 22 to be colored.

[0040] The hydraulic mixture 2 colored in the first color by the coloring agent adding unit 31 is sent to the nozzle 6 and discharged from the nozzle 6 to a predetermined position to form the first layer 111. The control unit 9B controls the hydraulic mixture 2 discharged from the nozzle 6 to have the shape of the first layer 111. The mixing of the uncolored hydraulic mixture 22 and the coloring agent 3 and the discharge from the nozzle 6 may be performed, for example, by a mixing nozzle having a mixer rotor that mixes the uncolored hydraulic mixture 22 and the coloring agent 3 and a nozzle into which the mixed coloring agent 3 and hydraulic mixture 22 directly flow from the mixer rotor. By employing a mixing nozzle, the hydraulic mixture 2 in a well-mixed state can be discharged from the nozzle.

[0041] Next, in order to form the second layer 112, the colorant 3 is added to the uncolored hydraulic mixture 22 pumped from the hopper 5 to the nozzle 6 in the colorant adding unit 31 to color it a second color. The control unit 9B controls the color (type) and amount of the colorant 3 added in the colorant adding unit 31 and the amount of the uncolored hydraulic mixture 22 to be colored.

[0042] The hydraulic mixture 2 colored in the second color by the coloring agent adding unit 31 is sent to the nozzle 6 and discharged from the nozzle 6 to a predetermined position to form a second layer 112. The control unit 9B controls the hydraulic mixture 2 discharged from the nozzle 6 so that it has the shape of the second layer 112.

[0043] One layer of a first color (third layer 113) overlapping the second layer 112 is formed in the same manner as the first layer 111, and one layer of a second color (fourth layer 114) overlapping the third layer 113 is formed in the same manner as the second layer 112, and this is repeated to produce the striped structural member 11.

[0044] In the additive manufacturing apparatus 1B for a structural member and the manufacturing method for a structural member 11 according to the second embodiment described above, it is possible to prevent hydraulic mixtures 2 of different colors from being mixed together. This makes it possible to construct a structural member 11 such as a concrete member in a plurality of colors. In addition, it is possible to change the amount of coloring agent 3 in one layer to create a gradation, and it is possible to totally control the process from manufacturing to discharging the hydraulic mixture 2.

[0045] Third embodiment As shown in FIG. 3, the additive manufacturing apparatus 1C for a structural member according to the third embodiment has two hoppers 51 and 52. The two hoppers 51 and 52 are referred to as a first hopper 51 and a second hopper 52. The first hopper 51 and the second hopper 52 are connected to the same nozzle 6C via different hoses 71 and 72, respectively. The hose 71 connecting the first hopper 51 and the nozzle 6C is referred to as a first hose 71, and the pump that pressure-feeds the hydraulic mixture from the first hopper 51 to the nozzle 6C is referred to as a first pump 81. The hose 72 connecting the second hopper 52 and the nozzle 6C is referred to as a second hose 72, and the pump that pressure-feeds the hydraulic mixture from the second hopper 52 to the nozzle 6C is referred to as a second pump 82. The nozzle 6C is provided with a switching mechanism 63 such as a shutter mechanism or an electromagnetic valve, and is configured to be able to switch the hydraulic mixture 2 that is pressure-fed.

[0046] Hydraulic mixtures 2 of different colors are respectively fed into the first hopper 51 and the second hopper 52. As in the first embodiment, the additive manufacturing apparatus 1D for structural members is provided with a hydraulic mixture production unit 4 that produces the hydraulic mixture 2 to be fed into the first hopper 51 and the second hopper 52. Note that the hydraulic mixtures 2 produced in different locations may be fed into the first hopper 51 and the second hopper 52.

[0047] The control unit 9C of the third embodiment controls the color (type) and amount of colorant 3 added in the hydraulic mixture manufacturing unit 4, controls the amount of hydraulic mixture 2 manufactured in the hydraulic mixture manufacturing unit 4, controls the pressure transfer of the first pump 81 and the second pump 82, controls the switching mechanism 63, and controls the amount and direction of the hydraulic mixture 2 discharged from the nozzle 6C.

[0048] The operation of the additive manufacturing apparatus 1C for a structural member according to the third embodiment (a method for manufacturing a structural member 11) will be described. In the third embodiment, a structural member 11 with a striped pattern in which layers of two colors are alternately arranged is manufactured, as in the first embodiment. One of the two colors is designated as a first color, and the other is designated as a second color.

[0049] First, hydraulic mixtures 2 of different colors are loaded into the first hopper 51 and the second hopper 52. In the third embodiment, the hydraulic mixture 2 of the first color is loaded into the first hopper 51, and the hydraulic mixture 2 of the second color is loaded into the second hopper 52.

[0050] The first pump 81 is operated to pump the first color hydraulic mixture 2 from the first hopper 51 to the nozzle 6C, and the hydraulic mixture 2 discharged from the nozzle 6C to a predetermined position forms a first layer 111. The control unit 9C controls the switching mechanism 63 to perform control to discharge the first color hydraulic mixture 2 from the nozzle 6C.

[0051] Next, the second pump 82 is operated to pump the second color hydraulic mixture 2 from the second hopper 52 to the nozzle 6C, and the hydraulic mixture 2 discharged from the nozzle 6C to a predetermined position forms a second layer 112. The control unit 9C controls the switching mechanism 63 to perform control to discharge the second color hydraulic mixture 2 from the nozzle 6C.

[0052] One layer of a first color (third layer 113) overlapping the second layer 112 is formed in the same manner as the first layer 111, and one layer of a second color (fourth layer 114) overlapping the third layer 113 is formed in the same manner as the second layer 112, and this is repeated to produce the striped structural member 11.

[0053] In the additive manufacturing apparatus 1C for a structural member and the manufacturing method for a structural member 11 according to the third embodiment described above, it is possible to prevent hydraulic mixtures 2 of different colors from being mixed together. This makes it possible to construct a structural member 11 such as a concrete member in a plurality of colors. In addition, it is possible to totally control the process from manufacturing to discharging the hydraulic mixture 2.

[0054] (Fourth embodiment) As shown in FIG. 4, the additive manufacturing apparatus 1D for a structural member according to the fourth embodiment has two hoppers 51, 52 and two nozzles 61, 62. The two hoppers 51, 52 are referred to as a first hopper 51 and a second hopper 52. The two nozzles 61, 62 are referred to as a first nozzle 61 and a second nozzle 62. The first hopper 51 is connected to the first nozzle 61. The second hopper 52 is connected to the second nozzle 62. A hose connecting the first hopper 51 and the first nozzle 61 is referred to as a first hose 71, and a pump for pumping the hydraulic mixture from the first hopper 51 to the first nozzle 61 is referred to as a first pump 81. A hose connecting the second hopper 52 and the second nozzle 62 is referred to as a second hose 72, and a pump for pumping the hydraulic mixture from the second hopper 52 to the second nozzle 62 is referred to as a second pump 82.

[0055] Hydraulic mixtures 2 of different colors are respectively fed into the first hopper 51 and the second hopper 52. As in the first embodiment, the additive manufacturing apparatus 1D for structural members is provided with a hydraulic mixture production unit 4 that produces the hydraulic mixture 2 to be fed into the first hopper 51 and the second hopper 52. Note that the hydraulic mixtures 2 produced in different locations may be fed into the first hopper 51 and the second hopper 52.

[0056] The control unit 9D of the fourth embodiment controls the color (type) and amount of colorant 3 added in the hydraulic mixture manufacturing unit 4, controls the amount of hydraulic mixture 2 manufactured in the hydraulic mixture manufacturing unit 4, controls the pressure supply of the first pump 81 and the second pump 82, switches the nozzle for ejecting the hydraulic mixture 2 to either the first nozzle 61 or the second nozzle 62, and controls the amount and direction of ejection of the hydraulic mixture 2 from the first nozzle 61 and the second nozzle 62.

[0057] The operation of the additive manufacturing apparatus 1D for a structural member according to the fourth embodiment (a method for manufacturing a structural member 11) will be described. In the fourth embodiment, a structural member 11 with a striped pattern in which layers of two colors are alternately arranged is manufactured, as in the first embodiment. One of the two colors is designated as a first color, and the other is designated as a second color.

[0058] First, hydraulic mixtures 2 of different colors are loaded into the first hopper 51 and the second hopper 52. In the fourth embodiment, the hydraulic mixture 2 of the first color is loaded into the first hopper 51, and the hydraulic mixture 2 of the second color is loaded into the second hopper 52.

[0059] The first pump 81 is operated to pump the first color hydraulic mixture 2 from the first hopper 51 to the first nozzle 61, and the first layer 111 is formed by the hydraulic mixture 2 discharged from the first nozzle 61 to a predetermined position. The control unit 9D controls the first pump 81 and the first nozzle 61 so that the first color hydraulic mixture 2 put into the first hopper 51 is pumped to the first nozzle 61.

[0060] Next, the second pump 82 is operated to pump the second color hydraulic mixture 2 from the second hopper 52 to the second nozzle 62, and the second layer 112 is formed by the hydraulic mixture 2 discharged to a predetermined position from the second nozzle 62. The control unit 9D controls the second pump 82 and the second nozzle 62 so that the second color hydraulic mixture 2 charged in the second hopper 52 is pumped to the second nozzle 62.

[0061] One layer of a first color (third layer 113) overlapping the second layer 112 is formed in the same manner as the first layer 111, and one layer of a second color (fourth layer 114) overlapping the third layer 113 is formed in the same manner as the second layer 112, and this is repeated to produce the striped structural member 11.

[0062] In the additive manufacturing apparatus 1D for a structural member and the manufacturing method for a structural member 11 according to the fourth embodiment described above, it is possible to prevent hydraulic mixtures 2 of different colors from being mixed together. This makes it possible to construct a structural member 11 such as a concrete member in a plurality of colors. In addition, it is possible to totally control the process from manufacturing to discharging the hydraulic mixture 2.

[0063] The above describes the embodiments of the additive manufacturing apparatus for structural components and the method for producing structural components according to the present invention. However, the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above embodiment, a structural member 11 with a striped pattern in which layers of two colors are alternately arranged is manufactured, but multiple colors may be mixed in one layer, and the number of colors and their arrangement and shape may be set appropriately. Also, when hoppers 5 and nozzles 6 are provided for each color, the number of hoppers 5 and nozzles 6 may be set according to the number of colors. In the above embodiment, the hydraulic mixture 2 is concrete, but it may be a hydraulic mixture containing various cementitious materials (e.g., cement paste, mortar, etc.), geopolymer compositions, etc., other than concrete. In the case of cementitious materials, white cement may be used so that it can be easily colored with pigments.

[0064] The additive manufacturing apparatuses 1, 1B-1D for structural members according to the above embodiments are provided with a hydraulic mixture manufacturing unit 4 for manufacturing the hydraulic mixture 2, 22 to be fed into the hopper 5, but may not be provided. For example, either or both of the manufacturing of the hydraulic mixture 2, 22 and the feeding of the hydraulic mixture 2, 22 into the hopper 5 may be performed manually. In such a case, the control unit 9 is configured not to control either or both of the manufacturing of the hydraulic mixture 2, 22 and the feeding of the hydraulic mixture 2, 22 into the hopper 5. The control unit 9 may be configured to switch the color of the hydraulic mixture 2 to be discharged from the nozzle 6 by switching the hydraulic mixture 2 to be discharged from the nozzle 6 among a plurality of hydraulic mixtures 2 of different colors. [Explanation of symbols]

[0065] 1,1B-1D Additive manufacturing equipment for structural components 2 Hydraulic mixture 3 Coloring agent 4 Hydraulic mixture manufacturing department 5 Hopper 6 Nozzles 8. Pump 9,9B-9D Control section 11 Structural members 31 Coloring agent addition section 51 First Hopper 52 Second Hopper 61 No. 1 nozzle 62 No. 2 nozzle

Claims

1. In an additive manufacturing apparatus for a structural member, the apparatus produces structural members of multiple colors by discharging hydraulic mixtures of multiple different colors, A hopper into which the hydraulic mixture is poured; A nozzle for discharging the hydraulic mixture; A pump that pressure-feeds the hydraulic mixture introduced into the hopper to the nozzle; A control unit that switches the hydraulic mixture discharged from the nozzle among the plurality of different colors of hydraulic mixtures to switch the color of the hydraulic mixture discharged from the nozzle, The hopper is configured to receive any one of the plurality of different color hydraulic mixtures, The control unit is an additive manufacturing device for structural components that switches the hydraulic mixture fed into the hopper from the plurality of different colored hydraulic mixtures and switches the color of the hydraulic mixture discharged from the nozzle.

2. A hydraulic mixture manufacturing unit that manufactures the hydraulic mixture to be charged into the hopper, The additive manufacturing device for a structural component according to claim 1 , wherein the control unit switches the color of the hydraulic mixture discharged from the nozzle by switching the color of the hydraulic mixture manufactured in the hydraulic mixture manufacturing unit.

3. In an additive manufacturing apparatus for a structural member, the apparatus produces structural members of multiple colors by discharging hydraulic mixtures of multiple different colors, A hopper into which the hydraulic mixture is poured; A nozzle for discharging the hydraulic mixture; A pump that pressure-feeds the hydraulic mixture introduced into the hopper to the nozzle; A control unit that switches the hydraulic mixture discharged from the nozzle among the plurality of different colors of hydraulic mixtures to switch the color of the hydraulic mixture discharged from the nozzle, The hydraulic mixture is pumped from the hopper to the nozzle, and a coloring agent adding unit is provided between the hopper and the nozzle to add a coloring agent to the hydraulic mixture. The control unit is an additive manufacturing device for a structural component that switches the color of the hydraulic mixture ejected from the nozzle by switching the color of the colorant added in the colorant addition unit.

4. A method for producing a structural component, comprising producing a structural component of multiple colors using an additive manufacturing apparatus for a structural component described in any one of claims 1 to 3.

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