Three-dimensional shaping device

Abstract

To provide a three-dimensional molding device that can reduce a possibility that a gap will occur between a first deposition part and a second deposition part after being pressed by a pressing part.SOLUTION: A three-dimensional molding device includes: a stage; a discharge part having a tip with first and second nozzle holes formed adjacent to each other at predetermined intervals along a first axis, and ejecting the material from the first and second nozzle holes toward the stage; a position change part that changes a relative position of the stage and the discharge part along a second axis that is parallel to a deposition surface and perpendicular to the first axis; and a pressing part that is disposed at a rear of the discharge part in a moving direction relative to the stage and presses the material deposited on the stage. The pressing part presses to connect a first deposition part dispensed and deposited from the first nozzle hole and a second deposition part discharged from the second nozzle hole and deposited at a distance from the first deposition part.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a three-dimensional shaping apparatus.

Background Art

[0002] There is known a three-dimensional shaping apparatus that shapes a three-dimensional shaped object by discharging a plasticized material toward a stage and curing it.

[0003] For example, Patent Document 1 describes a three-dimensional shaping apparatus provided with a discharge unit in which a plurality of nozzles are arranged in a staggered pattern when viewed in the +Z direction. In Patent Document 1, the discharge unit is relatively moved in the +X direction with respect to the stage, and the materials discharged from adjacent nozzles in the Y direction come into contact with each other.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0007] One aspect of the three-dimensional molding apparatus according to the present invention is: A stage having a deposition surface on which material is deposited, A discharge section having a tip portion in which a first nozzle hole and a second nozzle hole are formed adjacent to each other at a predetermined interval along a first axis parallel to the deposition surface, and discharging the material from the first nozzle hole and the second nozzle hole toward the stage, A position changing unit that changes the relative position between the stage and the discharge unit along a second axis parallel to the deposition surface and perpendicular to the first axis, A pressing section is positioned behind the discharge section in the direction of relative movement with respect to the stage, and presses the material accumulated on the stage. Includes, The pressing portion presses to connect the first deposited portion discharged and deposited from the first nozzle hole and the second deposited portion discharged from the second nozzle hole and deposited at a distance from the first deposited portion. [Brief explanation of the drawing]

[0008] [Figure 1] A schematic cross-sectional view showing the three-dimensional molding apparatus according to this embodiment. [Figure 2] A schematic perspective view showing the flat screw of the three-dimensional molding apparatus according to this embodiment. [Figure 3] A schematic diagram showing the barrel of the three-dimensional molding apparatus according to this embodiment. [Figure 4] A schematic side view showing the tip of the three-dimensional molding apparatus according to this embodiment. [Figure 5] A schematic bottom view showing the tip of the three-dimensional molding apparatus according to this embodiment. [Figure 6] A schematic cross-sectional view showing the tip of the three-dimensional molding apparatus according to this embodiment. [Figure 7] A schematic cross-sectional perspective view showing the tip of the three-dimensional molding apparatus according to this embodiment. [Figure 8] A flowchart illustrating the processing of the control unit of the three-dimensional molding apparatus according to this embodiment. [Figure 9] Cross-sectional view for explaining the formation process of the shaping layer of the three-dimensional shaping apparatus according to the present embodiment. [Figure 10] Plan view for explaining the formation process of the shaping layer of the three-dimensional shaping apparatus according to the present embodiment. [Figure 11] Plan view for explaining the formation process of the shaping layer of the three-dimensional shaping apparatus according to the reference example. [Figure 12] Cross-sectional view schematically showing the storage part of the three-dimensional shaping apparatus according to the first modification example of the present embodiment. [Figure 13] Diagram for explaining the flow of the material of the three-dimensional shaping apparatus according to the reference example. [Figure 14] Table showing the sizes and shapes of the main body part, the charging part, and the connecting pipe used in the experimental example. [Figure 15] Table showing the materials used in the experimental example and the bridge evaluation results.

Mode for Carrying Out the Invention

[0009] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Note that the embodiments described below do not unduly limit the content of the present invention described in the claims. Also, not all of the configurations described below are essential constituent elements of the present invention.

[0010] 1. Three-dimensional shaping apparatus 1.1. Overall configuration First, the three-dimensional shaping apparatus according to the present embodiment will be described while referring to the drawings. FIG. 1 is a cross-sectional view schematically showing the three-dimensional shaping apparatus 100 according to the present embodiment. In FIG. 1, the X-axis, the Y-axis, and the Z-axis are shown as three axes orthogonal to each other. The X-axis direction and the Y-axis direction are, for example, horizontal directions. The Z-axis direction is, for example, a vertical direction.

[0011] As shown in FIG. 1, the three-dimensional shaping apparatus 100 includes, for example, a discharge part 10, a stage 20, a position changing part 30, and a control part 40.

[0012] The three-dimensional shaping apparatus 100 ejects the plasticized shaping material from the ejection unit 10 toward the stage 20, while driving the position changing unit 30 to change the relative position between the ejection unit 10 and the stage 20. Thereby, the three-dimensional shaping apparatus 100 shapes a three-dimensional shaped object with a desired shape on the stage 20.

[0013] Although not shown in the drawings, a plurality of ejection units 10 may be provided. For example, two ejection units 10 may be provided. In this case, both of the two ejection units 10 may eject the shaping material that constitutes the three-dimensional shaped object, or one may eject the shaping material and the other may eject a support material that supports the three-dimensional shaped object.

[0014] As shown in FIG. 1, the ejection unit 10 has, for example, a storage unit 110, a plasticizing unit 120, and a tip 160. For the sake of convenience, in FIG. 1, the tip 160 is shown in a simplified manner.

[0015] The storage unit 110 stores the material that is the raw material. The storage unit 110 supplies the stored material to the plasticizing unit 12o. The shape of the material supplied by the storage unit 110 is, for example, pellet shape or powder shape. The storage unit 110 is configured to include, for example, a hopper. The material supplied by the storage unit 110 is, for example, acrylonitrile butadiene styrene (ABS) resin.

[0016] The plasticizing unit 120 has, for example, a screw case 122, a drive motor 124, a flat screw 130, a barrel 140, and a heater 150. The plasticizing unit 120 plasticizes at least a part of the solid-state material supplied from the storage unit 110, generates a paste-like shaping material having fluidity, and supplies it to the tip 160.

[0017] Plasticization is a concept that includes melting, and refers to the process of changing a solid state to a fluid state. Specifically, for materials that undergo a glass transition, plasticization means raising the material's temperature above its glass transition point. For materials that do not undergo a glass transition, plasticization means raising the material's temperature above its melting point.

[0018] The screw case 122 is a housing that contains the flat screw 130. A barrel 140 is provided on the bottom surface of the screw case 122. The flat screw 130 is housed in the space enclosed by the screw case 122 and the barrel 140.

[0019] The drive motor 124 is mounted on the upper surface of the screw case 122. The drive motor 124 is, for example, a servo motor. The shaft 126 of the drive motor 124 is connected to the upper surface 131 of the flat screw 130. The drive motor 124 is controlled by the control unit 40. Although not shown in the figures, the shaft 126 of the drive motor 124 and the upper surface 131 of the flat screw 130 may be connected via a reduction gear.

[0020] The flat screw 130 has a substantially cylindrical shape in which the magnitude in the direction of the rotation axis R is smaller than the magnitude in the direction perpendicular to the rotation axis R. In the illustrated example, the rotation axis R is parallel to the Z axis. The torque generated by the drive motor 124 causes the flat screw 130 to rotate around the rotation axis R.

[0021] The flat screw 130 has an upper surface 131, a groove-forming surface 132 opposite to the upper surface 131, and a side surface 133 connecting the upper surface 131 and the groove-forming surface 132. A first groove 134 is formed in the groove-forming surface 132. The side surface 133 is, for example, perpendicular to the groove-forming surface 132. Here, Figure 2 is a schematic perspective view of the flat screw 130. For convenience, Figure 2 shows the state with the vertical positional relationship reversed compared to the state shown in Figure 1.

[0022] As shown in Figure 2, a first groove 134 is formed on the groove-forming surface 132 of the flat screw 130. The first groove 134 has, for example, a central portion 135, a connecting portion 136, and a material introduction portion 137. The central portion 135 faces a communication hole 146 formed in the barrel 140. The central portion 135 communicates with the communication hole 146. The connecting portion 136 connects the central portion 135 and the material introduction portion 137. In the illustrated example, the connecting portion 136 is arranged in a spiral shape from the central portion 135 toward the outer circumference of the groove-forming surface 132. The material introduction portion 137 is provided on the outer circumference of the groove-forming surface 132. That is, the material introduction portion 137 is provided on the side surface 133 of the flat screw 130. The material supplied from the storage section 110 is introduced into the first groove 134 from the material introduction section 137, and is transported through the connecting section 136 and the central section 135 to the communication hole 146 formed in the barrel 140. For example, there are two first grooves 134.

[0023] The number of first grooves 134 is not particularly limited. Although not shown in the diagram, there may be three or more first grooves 134, or there may be only one.

[0024] As shown in Figure 1, the barrel 140 is located below the flat screw 130. In the illustrated example, "below" refers to the -Z axis direction. The barrel 140 has an opposing surface 142 that faces the groove-forming surface 132 of the flat screw 130. A communication hole 146 is formed in the center of the opposing surface 142, communicating with the first groove 134. Here, Figure 3 is a schematic plan view of the barrel 140.

[0025] As shown in Figure 3, a second groove 144 and a communication hole 146 are formed on the opposing surface 142 of the barrel 140. Multiple second grooves 144 are formed. In the illustrated example, six second grooves 144 are formed, but the number of second grooves 144 is not particularly limited. Multiple second grooves 144 are formed around the communication hole 146 when viewed from the Z-axis direction. One end of the second groove 144 is connected to the communication hole 146 and extends in a spiral shape from the communication hole 146 toward the outer circumference 148 of the barrel 140. The second groove 144 has the function of guiding the plasticized molding material to the communication hole 146.

[0026] The shape of the second groove 144 is not particularly limited and may be, for example, straight. Also, one end of the second groove 144 does not have to be connected to the communication hole 146. Furthermore, the second groove 144 does not have to be formed on the opposing surface 142. However, considering the efficient guidance of the plasticized molding material into the communication hole 146, it is preferable that the second groove 144 be formed on the opposing surface 142.

[0027] As shown in Figure 1, the heater 150 is provided on the barrel 140. The heater 150 heats the material supplied between the flat screw 130 and the barrel 140. The heater 150 is controlled by the control unit 40. The plasticizing unit 120 uses the flat screw 130, barrel 140, and heater 150 to heat and transport the material toward the communication hole 146, generating plasticized molding material, which is then discharged from the communication hole 146. Viewed from the Z-axis direction, the shape of the heater 150 may be ring-shaped. Note that the heater 150 does not necessarily have to be provided on the barrel 140; for example, it may be provided on the flat screw 130. Although not shown in the figures, the three-dimensional molding apparatus 100 may use an in-line screw that is long in the direction of the rotation axis to plasticize the material instead of the plasticizing unit 120 described above.

[0028] The tip 160 is located below the barrel 140. Plasticized molding material is supplied to the tip 160 from the communication hole 146. The discharge unit 10 discharges the material toward the stage 20 from a position where the tip 160 does not come into contact with the material deposited on the stage 20. The distance between the tip 160 and the material deposited on the stage 20 is, for example, 0.2 mm to 1.0 mm, preferably 0.4 mm to 0.6 mm. Details of the tip 160 will be described later.

[0029] Stage 20 is located below the tip 160. In the illustrated example, the shape of stage 20 is a rectangular parallelepiped. Stage 20 supports the material extruded from the extrusion unit 10. Stage 20 has a deposit surface 22 on which the material is deposited. The deposit surface 22 is the upper surface area of ​​stage 20. The deposit surface 22 is parallel to the X and Y axes.

[0030] The material of stage 20 is, for example, a metal such as aluminum. Stage 20 may consist of a metal plate and an adhesive sheet provided on the metal plate. In this case, the deposition surface 22 is formed by the adhesive sheet. The adhesive sheet is formed by the stage 20 and the discharge section 10. This improves the adhesion between the extruded molding material and the surface.

[0031] Stage 20, although not shown in the diagram, may consist of a metal plate with grooves formed in it and a base layer provided to fill the grooves. In this case, the deposition surface 22 is composed of the base layer. The material of the base layer is, for example, the same as the molding material. The base layer can improve the adhesion between Stage 20 and the molding material extruded from the extrusion section 10.

[0032] The position-changing section 30 supports the stage 20. The position-changing section 30 changes the relative position between the discharge section 10 and the stage 20 along a second axis that is parallel to the deposition surface 22 and perpendicular to the first axis. In the illustrated example, the first axis is the Y-axis, and the second axis is the X-axis.

[0033] The position changing unit 30 changes the relative position between the discharge unit 10 and the stage 20 in the X-axis and Y-axis directions, for example, by moving the stage 20 in the X-axis and Y-axis directions. Furthermore, the position changing unit 30 changes the relative position between the discharge unit 10 and the stage 20 in the Z-axis direction by moving the discharge unit 10 in the Z-axis direction.

[0034] The position changing unit 30 includes, for example, a first electric actuator 32, a second electric actuator 34, and a third electric actuator 36. The first electric actuator 32 moves the stage 20 in the X-axis direction. The second electric actuator 34 moves the stage 20 in the Y-axis direction. The third electric actuator 36 moves the discharge unit 10 in the Z-axis direction. The third electric actuator 36 supports the discharge unit 10.

[0035] The position changing unit 30 is not particularly limited in its configuration, as long as it can change the relative position between the discharge unit 10 and the stage 20. For example, the position changing unit 30 may be configured to move the stage 20 in the Z-axis direction and the discharge unit 10 in the X-axis and Y-axis directions, or it may be configured to move the stage 20 or the discharge unit 10 in the X-axis, Y-axis, and Z-axis directions. Furthermore, the position changing unit 30 does not necessarily have a second electric actuator 34 that moves the stage 20 in the Y-axis direction.

[0036] The control unit 40 is composed of, for example, a computer having a processor, main memory, and an input / output interface for inputting and outputting signals to and from the outside. The control unit 40 performs various functions, for example, by having the processor execute a program loaded into the main memory. Specifically, the control unit 40 controls the ejection unit 10 and the position changing unit 30. Note that the control unit 40 may be composed of a combination of multiple circuits instead of a computer.

[0037] 1.2. Tip Figure 4 is a schematic side view showing the tip portion 160. Figure 5 is a schematic bottom view showing the tip portion 160. Figure 6 is a schematic cross-sectional view of the tip portion 160 taken along line VI-VI in Figure 4. Figure 7 is a schematic cross-sectional perspective view showing the tip portion 160.

[0038] As shown in Figures 4 to 7, the tip portion 160 includes, for example, a base portion 162, a discharge adjustment portion 180, a heating portion 186, and a temperature sensor 188.

[0039] The base 162 is connected to the barrel 140, as shown in Figure 4. The shape of the base 162 is, for example, a roughly rectangular parallelepiped. The material of the base 162 is, for example, SUS (Steel Use Stainless). The base 162 has a nozzle hole 170 and a flow path 172 formed therein, as shown in Figures 5 to 7.

[0040] The nozzle hole 170 is formed on the bottom surface 164 of the base 162, as shown in Figure 5. In the example shown, the bottom surface 164 is the end face of the base portion 162 in the -Z-axis direction. Viewed from the Z-axis direction, the shape of the nozzle hole 170 is rectangular. The extrusion unit 10 extrudes the molding material from the nozzle hole 170 toward the stage 20. The shape of the nozzle hole 170 is not particularly limited and may be, for example, a circle.

[0041] Multiple nozzle holes 170 are formed. In the illustrated example, the multiple nozzle holes 170 are the same size. The multiple nozzle holes 170 are arranged linearly along the Y-axis at a predetermined pitch. In the illustrated example, eight nozzle holes 170 are formed, but the number is not particularly limited. Of the multiple nozzle holes 170, the first nozzle hole 170a and the second nozzle hole 170b are formed adjacent to each other. In the illustrated example, the first nozzle hole 170a is the furthest along the -Y-axis among the eight nozzle holes 170. The first nozzle hole 170a and the second nozzle hole 170b are formed with a predetermined gap along the Y-axis. Note that the sizes of the multiple nozzle holes 170 may differ from each other.

[0042] As shown in Figure 6, the flow path 172 connects the nozzle hole 170 and the communication hole 146 formed in the barrel 140. The flow path 172 has a common flow path 173 and individual flow paths 178.

[0043] The common flow path 173 includes, for example, a flow section 174 that communicates with the communication hole 146, a first branch section 175 that branches into two from the flow section 174, a second branch section 176 that branches into two from each of the tips of the first branch section 175, and a third branch section 177 that branches into two from each of the tips of the second branch section 176.

[0044] The individual channel 178 connects the common channel 173 and the nozzle hole 170. In the illustrated example, the individual channel 178 connects the third branch 177 and the nozzle hole 170. The molding material passes sequentially through the communication hole 146, the flow section 174, the first branch 175, the second branch 176, the third branch 177, and the individual channel 178, and is discharged from the nozzle hole 170.

[0045] Multiple individual channels 178 are formed, corresponding to the nozzle holes 170. Of the multiple individual channels 178, the first individual channel 178a communicates with the first nozzle hole 170a. Of the multiple individual channels 178, the second individual channel 178b communicates with the second nozzle hole 170b.

[0046] Each individual channel 178 has, for example, an expanded portion 179a, a constricted portion 179b, and a portion with a constant cross-sectional area 179c, as shown in Figure 7.

[0047] In the expanded portion 179a of the individual channel 178, the cross-sectional area of ​​the individual channel 178 increases as it approaches the nozzle hole 170. In the illustrated example, the cross-sectional area of ​​the expanded portion 179a increases as the width of the individual channel 178 in the Y-axis direction increases. In the illustrated example, "cross-sectional area" refers to the cross-sectional area when cut by a plane parallel to the XY plane.

[0048] In the constricted portion 179b of the individual channel 178, the cross-sectional area of ​​the individual channel 178 decreases as it approaches the nozzle hole 170. In the illustrated example, the cross-sectional area of ​​the constricted portion 179b decreases as the width of the individual channel 178 in the X-axis direction decreases. The constricted portion 179b is located downstream of the expanded portion 179a.

[0049] In the constant cross-sectional area portion 179c of the individual channel 178, the cross-sectional area of ​​the individual channel 178 remains constant as it approaches the nozzle hole 170. The constant cross-sectional area portion 179c is located downstream of the constricted portion 179b. In the illustrated example, the constant cross-sectional area portion 179c is connected to the nozzle hole 170.

[0050] The discharge adjustment unit 180 adjusts the amount of molding material discharged from the nozzle hole 170. As shown in Figure 5, the discharge adjustment unit 180 has an insertion part 182 that is inserted into the individual flow path 178 and a support part 184 that supports the insertion part 182.

[0051] The shape of the insertion portion 182 of the discharge adjustment unit 180 is, for example, rectangular when viewed from the X-axis direction. If the shape of the insertion portion 182 is rectangular, for example, it is easier to machine the insertion portion 182 compared to the case where the shape of the insertion portion is round.

[0052] The support portion 184 of the discharge adjustment unit 180 is connected to a drive unit (not shown). The drive unit moves the discharge adjustment unit 180 in the X-axis direction. This allows the insertion portion 182 to be inserted into the individual flow path 178 or removed from the individual flow path 178. In the illustrated example, the insertion portion 182 is inserted into the connection portion of the individual flow path 178 to the common flow path 173. The drive unit consists of, for example, a compressor, a solenoid, a motor, etc. The drive unit is controlled by the control unit 40.

[0053] Multiple dispensing adjustment units 180 are provided, corresponding to multiple nozzle holes 170. The first dispensing adjustment unit 180a of the multiple dispensing adjustment units 180 adjusts the amount of material dispensed from the first nozzle hole 170a. The second dispensing adjustment unit 180b of the multiple dispensing adjustment units 180 adjusts the amount of material dispensed from the second nozzle hole 170b. Two dispensing adjustment units 180 inserted into adjacent individual channels 178 of the multiple individual channels 178 are moved in opposite directions in the X-axis direction before insertion. In the illustrated example, the first dispensing adjustment unit 180a is moved in the -X-axis direction and inserted into the first individual channel 178a. The second dispensing adjustment unit 180b is moved in the +X-axis direction and inserted into the second individual channel 178b. Furthermore, the discharge adjustment unit 180 does not need to be provided in relation to each of the multiple nozzle holes 170; the discharge adjustment unit 180 may be provided in at least one of the multiple nozzle holes 170.

[0054] The heating element 186 is provided on the base 162, as shown in Figure 7. The heating element 186 is, for example, a rod heater. In the illustrated example, the heating element 186 is inserted into the base 162 in the Y-axis direction. The heating element 186 penetrates the base 162, for example. The heating element 186 heats the individual flow channels 178 by heating the base 162. The heating element 186 heats the pressing elements 190 and 192 via the screw 194. The heating element 186 is controlled by the control unit 40.

[0055] For example, multiple heating units 186 are provided. In the example shown in Figure 4, four heating units 186 are provided. The tip portion 160 has a first heating unit 186a and a second heating unit 186b as heating units 186. In the illustrated example, the first heating unit 186a and the second heating unit 186b are aligned in the Z-axis direction. The second heating unit 186b is provided closer to the nozzle hole 170 than the first heating unit 186a. As shown in Figure 6, viewed from the X-axis direction, the discharge adjustment unit 180 is provided between the first heating unit 186a and the second heating unit 186b. Viewed from the X-axis direction, the discharge adjustment unit 180 is not provided between the second heating unit 186b and the nozzle hole 170. Note that it is not necessary to provide a heater common to each individual flow path 178; each individual flow path 178 may have its own heater.

[0056] As shown in Figure 4, the temperature sensor 188 is provided on the base 162. In the example shown in the figure, two temperature sensors 188 are provided. The temperature sensor 188 is, for example, a thermocouple. The temperature sensor 188 detects the temperature of the flow path 172. The control unit 40 controls the heating unit 186 based on the value detected by the temperature sensor 188.

[0057] 1.3. Pressing part As shown in Figures 4 and 5, the three-dimensional molding apparatus 100 further includes a first pressing section 190 and , including a second pressing portion 192.

[0058] The first pressing portion 190 and the second pressing portion 192 are attached to the tip portion 160. In the illustrated example, the pressing portions 190 and 192 are attached to the -Z-axis end of the tip portion 160. The pressing portions 190 and 192 are attached to the tip portion 160 by, for example, a screw 194. The heating portion 186 heats the pressing portions 190 and 192 via the screw 194. In the illustrated example, the screw 194 is located in the Y-axis direction of the pressing portions 190 and 192.

[0059] The first pressing portion 190 and the second pressing portion 192 are, for example, rollers. As shown in Figure 5, viewed from the Z-axis direction, the nozzle hole 170 is formed between the first pressing portion 190 and the second pressing portion 192. The first pressing portion 190 and the second pressing portion 192 are aligned in the X-axis direction. In the illustrated example, the first pressing portion 190 is positioned in the -X-axis direction more than the second pressing portion 192.

[0060] The first pressing section 190 and the second pressing section 192 are positioned behind the dispensing section 10 in the direction of relative movement to the stage 20, and press the material accumulated on the stage 20. In the illustrated example, when the dispensing section 10 moves in the +X direction relative to the stage 20, the first pressing section 190 is positioned behind the direction of movement and presses the material accumulated on the stage 20. When the dispensing section 10 moves in the -X direction relative to the stage 20, the second pressing section 192 is positioned behind the direction of movement and presses the material accumulated on the stage 20. The pressing sections 190 and 192 press the material accumulated on the stage 20 toward the stage 20.

[0061] The first pressing portion 190 and the second pressing portion 192 are made of, for example, a SUS material coated with chromium nitride. By coating with chromium nitride, the material deposited on the stage 20 is less likely to stick to the surfaces of the pressing portions 190 and 192. If the discharge portion 10 moves in one direction while discharging the material, it is sufficient that one of the pressing portions 190 or 192 is positioned behind the discharge portion 10 in the direction of relative movement of the discharge portion 10 to the stage 20.

[0062] 1.4. Operation Figure 8 is a flowchart illustrating the processing performed by the control unit 40.

[0063] The user, for example, operates an operating unit (not shown) to output a processing start signal to the control unit 40 to initiate processing. The operating unit consists of, for example, a mouse, keyboard, or touch panel. When the control unit 40 receives the processing start signal, it starts processing.

[0064] 1.4.1. Modeling Data Acquisition Process First, as shown in Figure 8, the control unit 40 performs a manufacturing data acquisition process as step S1 to acquire manufacturing data for manufacturing a three-dimensional object.

[0065] The molding data includes information such as the type of material stored in the storage unit 110, the movement path of the dispensing unit 10 relative to the stage 20, and the amount of molding material dispensed from the dispensing unit 10.

[0066] The 3D modeling data is created, for example, by loading shape data into slicer software installed on a computer connected to the 3D modeling device 100. Shape data is data representing the target shape of a 3D model created using 3D CAD (Computer Aided Design) software or 3D CG (Computer Graphics) software. Shape data can be in formats such as STL (Standard Triangulated Language) or AMF (Additive Manufacturing File Format). The slicer software is... The target shape of the 3D model is divided into layers of predetermined thickness, and modeling data is created for each layer. The modeling data is represented by G-code, M-code, or the like. The control unit 40 acquires the modeling data from a computer connected to the 3D modeling device 100 or from a recording medium such as a USB (Universal Serial Bus) memory.

[0067] 1.4.2. Layer Formation Process Next, as step S2, the control unit 40 performs a build layer formation process in which the build material is extruded onto the deposition surface 22 of the stage 20 to form a build layer. Specifically, the control unit 40 plasticizes the material supplied between the flat screw 130 and the barrel 140 to generate the molding material, and discharges the molding material from the nozzle hole 170 of the tip 160. The control unit 40 continues to generate the molding material, for example, until the molding layer formation process is completed.

[0068] Here, Figure 9 is a cross-sectional view illustrating the layer formation process of the three-dimensional molding apparatus 100. Figure 10 is a plan view illustrating the layer formation process of the three-dimensional molding apparatus 100.

[0069] As shown in Figure 9, the control unit 40 controls the position change unit 30 based on the acquired molding data to change the relative position between the ejection unit 10 and the stage 20, and controls the ejection unit 10 to eject the molding material from the tip 160 toward the stage 20.

[0070] Specifically, before the process of forming the build layer begins, that is, before the formation of the first build layer, build layer L1, begins, the tip 160 is positioned at an initial position in the -X direction relative to the end of the stage 20 in the -X direction. When the process of forming the build layer begins, as shown in Figure 9, the control unit 40 controls the position change unit 30 to move the tip 160 relative to the stage 20, for example, in the +X direction. As the tip 160 passes over the stage 20, the build material is ejected from the tip 160.

[0071] As shown in Figure 10, when molding material is ejected from the first nozzle hole 170a and the second nozzle hole 170b, the molding material ejected from the first nozzle hole 170a is deposited on the stage 20 to form the first deposited portion 2a. The molding material ejected from the second nozzle hole 170b is deposited on the stage 20 to form the second deposited portion 2b. The first deposited portion 2a and the second deposited portion 2b are deposited on the stage 20 with a gap between them before contact with the first pressing portion 190.

[0072] The first pressing unit 190 presses the first deposited portion 2a, which is discharged and deposited from the first nozzle hole 170a, and the second deposited portion 2b, which is discharged from the second nozzle hole 170b and deposited at a distance from the first deposited portion 2a, to connect them. As the first pressing unit 190 presses the first deposited portion 2a and the second deposited portion 2b, their width in the X-axis direction increases and they connect to each other to form a common deposited portion 4. Thus, the molded layer L1 is formed.

[0073] By repeating the above process, multiple build layers are stacked on the stage 20, as shown in Figure 9. In Figure 9, n is an arbitrary natural number, and the build layers up to the nth layer, Ln, are shown.

[0074] 1.4.3. Judgment Process Next, as shown in Figure 8, the control unit 40 performs a determination process in step S3 to determine whether or not the formation of all layers has been completed based on the molding data.

[0075] If the control unit 40 determines that the formation of all layers has not been completed (NO in step S3), the control unit 40 returns the process to step S2. Steps S2 and S3 are repeated until it is determined that the formation of the molded layer is complete.

[0076] On the other hand, if it is determined that the formation of all layers has been completed (YES in step S3), the control unit 40 terminates the process.

[0077] 1.5. Effects The three-dimensional molding apparatus 100 includes a stage 20 having a deposition surface 22 on which material is deposited, a tip portion 160 having a first nozzle hole 170a and a second nozzle hole 170b adjacent to each other at a predetermined distance along the Y axis parallel to the deposition surface 22, and a discharge portion 10 that discharges material from the first nozzle hole 170a and the second nozzle hole 170b toward the stage 20, a position changing portion 30 that changes the relative position between the stage 20 and the discharge portion 10 along the X axis parallel to the deposition surface 22, and a pressing portion 190 positioned behind the direction of relative movement of the discharge portion 10 with respect to the stage 20, and pressing the material deposited on the stage 20. The pressing portion 190 presses to connect the first deposition portion 2a discharged and deposited from the first nozzle hole 170a and the second deposition portion 2b discharged from the second nozzle hole 170b and deposited at a distance from the first deposition portion 2a.

[0078] Therefore, in the three-dimensional molding apparatus 100, compared to a case where the first nozzle holes and second nozzle holes are not arranged in a direction perpendicular to the relative movement direction of the discharge unit stage, the time difference between the material discharged from adjacent first nozzle holes 170a and second nozzle holes 170b and the time it takes for the material to come into contact with the deposited material can be reduced. Specifically, the difference between the time it takes for the material discharged from the first nozzle hole 170a to come into contact with the second deposited portion 2b and the time it takes for the material discharged from the second nozzle hole 170b to come into contact with the first deposited portion 2a can be reduced. This reduces the possibility of a gap forming between the first deposited portion 2a and the second deposited portion 2b after they have been pressed by the pressing unit 190.

[0079] Furthermore, the three-dimensional molding apparatus 100 can reduce wasted material, for example, when fabricating a rectangular three-dimensional object. As shown in Figure 11, if the first nozzle hole 1170a and the second nozzle hole 1170b are not aligned in the X-axis direction, in order to fabricate a rectangular three-dimensional object, it is necessary to cut the non-contact portion 1003 of the second deposition portion 1002b that does not come into contact with the first deposition portion 1002a, resulting in wasted material. Figure 11 is a plan view illustrating the layer formation process of a three-dimensional molding apparatus according to a reference example.

[0080] In the 3D printing apparatus 100, the ejection unit 10 ejects material from a position where the tip 160 does not come into contact with the material deposited on the stage 20. Therefore, in the 3D printing apparatus 100, the material deposited on the stage 20 is not pressed by the nozzle hole 170, but rather by the pressing unit 190 which moves in the Y-axis direction. As a result, if the deposited material contains air bubbles, the air bubbles can be cleanly removed by the pressing unit 190 which moves from one direction.

[0081] In the three-dimensional molding apparatus 100, an individual channel 178a is formed in the tip portion 160, communicating with the first nozzle hole 170a. The individual channel 178a has a narrowed portion 179b in which the cross-sectional area decreases toward the first nozzle hole 170a. Therefore, in the three-dimensional molding apparatus 100, the density of the material can be increased in the narrowed portion 179b. This makes it possible to reduce the amount of air bubbles mixed into the material.

[0082] In the three-dimensional molding apparatus 100, the tip portion 160 has a heating portion 186 that heats the individual flow channels 178a. Therefore, the three-dimensional molding apparatus 100 can improve the adhesion between the first deposited portion 2a and the second deposited portion 2b after they have been pressed by the pressing portion 190.

[0083] In the three-dimensional molding apparatus 100, the tip portion 160 has a heating section 186 which includes a first heating section 186a, a second heating section 186b located closer to the first nozzle hole 170a than the first heating section 186a, and a discharge adjustment section 180a located between the first heating section 186a and the second heating section 186b when viewed from the X-axis direction, for adjusting the discharge amount from the first nozzle hole 170a.

[0084] Therefore, in the three-dimensional molding apparatus 100, the distance between the second heating unit 186b and the first nozzle hole 170a can be reduced compared to, for example, a case where an ejection adjustment unit is provided between the second heating unit and the first nozzle hole when viewed from the X-axis direction. As a result, the first nozzle hole 170a can eject material at a high temperature. For example, if an ejection adjustment unit is provided between the second heating unit and the first nozzle hole when viewed from the X-axis direction, the distance between the second heating unit and the first nozzle hole must be increased.

[0085] In the three-dimensional molding apparatus 100, the heating unit 186 heats the pressing unit 190. Therefore, in the three-dimensional molding apparatus 100, the heating unit 186 that heats the individual flow channels 178a can heat the pressing unit 190, so there is no need to provide a separate heating unit to heat the pressing unit 190. This reduces the number of parts. Although not shown in the figures, a separate heating unit to heat the pressing unit 190 may be provided.

[0086] 2. Modified examples of 3D printing devices 2.1. First Variation Next, a three-dimensional molding apparatus according to the first modified example of this embodiment will be described with reference to the drawings. Figure 12 is a schematic cross-sectional view showing the three-dimensional molding apparatus 200 according to the first modified example of this embodiment. Hereinafter, in the three-dimensional molding apparatus 200 according to the first modified example of this embodiment, components having the same function as the components of the three-dimensional molding apparatus 100 according to the above-described embodiment will be denoted by the same reference numerals, and their detailed descriptions will be omitted.

[0087] In the three-dimensional molding apparatus 200, as shown in Figure 12, the shape of the storage section 110 is different from that of the three-dimensional molding apparatus 100 described above.

[0088] In the three-dimensional molding apparatus 200, the storage section 110 includes, for example, a main body section 210, an input section 220, and a connecting pipe 230. The material P is supplied to the plasticizing section 120 by passing through the main body section 210, the input section 220, and the connecting pipe 230 in that order.

[0089] The main body 210 has a cylindrical shape, for example. The main body 210 has one opening 212 and the other opening 214. The opening 212 is located in the +Z direction more than the other opening 214. When viewed from the Z direction, the center position of the opening 212 is the same as the center position of the other opening 214. The main body 210 has a bottom 216. In the illustrated example, the bottom 216 is the -Z direction end of the main body 210.

[0090] The input section 220 is connected to the bottom 216 of the main body 210. The input section 220 has a first opening 222 and a second opening 224. The first opening 222 is located in the +Z axis direction relative to the second opening 224. In the illustrated example, the area of ​​the first opening 222 is larger than the area of ​​the bottom 216 of the main body 210. With the bottom 216 inserted into the first opening 222, the main body 210 is fitted into the input section 220.

[0091] The input section 220 has an eccentric shape. When viewed from above the main body 210, the position of the center C1 of the first opening 222 and the position of the center C2 of the second opening 224 are different. When viewed from the Z-axis direction, the positions of the centers C1 and C2 are different. The area of ​​the first opening 222 is larger than the area of ​​the second opening 224.

[0092] The input section 220 includes, for example, a plate-like section 226, a first wall section 227, and a second wall section 228. The second opening 224 is provided in the plate-like section 226. In the illustrated example, the first wall section 227 is perpendicular to the upper surface of the plate-like section 226. The second wall section 228 is inclined at an angle θ with respect to the upper surface of the plate-like section 226. θ is, for example, 50° or more and less than 90°, preferably 55° or more and 85° or less, and more preferably 65° or more and 70° or less. The input section 220 is, for example, a hopper.

[0093] The input section 220 receives material P from the main body section 210. The input section 220 inputs the material P supplied from the first opening 222 into the plasticizing section 120 via the connecting pipe 230 through the second opening 224.

[0094] The connecting pipe 230 connects the input section 220 and the plasticizing section 120. In the illustrated example, the connecting pipe 230 is connected to the input section 220 by a screw 240 and a bolt 242. The connecting pipe 230 has a third opening 232. The third opening 232 is the opening on the input section 220 side of the connecting pipe 230. The third opening 232 communicates with the second opening 224. The area of ​​the second opening 224 is less than or equal to the area of ​​the third opening 232. In the illustrated example, the connecting pipe 230 extends in a direction inclined with respect to the Z axis.

[0095] In the three-dimensional printing apparatus 200, the position of the center C1 of the first opening 222 and the position of the center C2 of the second opening 224 are different when viewed from above the main body 210. Therefore, in the three-dimensional printing apparatus 200, the material P moves toward the second opening 224 in a state of disrupted symmetry, compared to the case where the positions of the center C1001 of the first opening 1222 and the center C1002 of the second opening 1224 are the same when viewed from the Z-axis direction as shown in Figure 13. Therefore, bridging is less likely to occur in the second opening 224. As shown in Figure 13, when the positions of the centers C1001 and C1002 are the same when viewed from the Z-axis direction, the material P moves toward the second opening 1224 while maintaining symmetry, so bridging is more likely to occur in the second opening 1224. Note that Figure 13 is a diagram illustrating the flow of material P in a three-dimensional printing apparatus according to a reference example.

[0096] In the three-dimensional printing apparatus 200, the area of ​​the second opening 224 is less than or equal to the area of ​​the third opening 232. Therefore, the three-dimensional printing apparatus 200 can more reliably guide the material passing through the second opening 224 to the third opening 232. For example, if the area of ​​the second opening is larger than the area of ​​the third opening, material may remain in the second opening.

[0097] Next, I will explain the experimental examples.

[0098] The storage section was constructed by assembling the main body, the input section, and the connecting pipes. One type of concentric connecting pipe and two types of eccentric connecting pipes were prepared. The "concentric type" is one in which, when viewed from above the main body, the center position of the first opening of the input section is the same as the center position of the second opening of the input section. The "eccentric type" is one in which, when viewed from above the main body, the center position of the first opening is different from the center position of the second opening.

[0099] Figure 14 is a table showing the size and shape of the main body, input section, and connecting tube used in the experimental example. In the table, "Length" refers to the length in the longitudinal direction. In the table, "Angle" refers to the angle corresponding to θ in Figure 12.

[0100] Block the outlet of the connecting pipe and insert approximately 50 cm of pellet-shaped material into the main body.3 The pipe was filled. Next, the outlet of the connecting pipe was opened to check whether or not a bridge had formed.

[0101] Figure 15 is a table showing the materials used in the experimental example and the bridge evaluation results. The table shows "PP "S" indicates polyphenylene sulfide. "ABS" in the table indicates acrylonitrile butadiene styrene resin. "POM" in the table indicates polyacetal. "GF" in the table indicates glass fiber. "Φ" in the table indicates diameter. In Figure 15, "A" indicates that no bridging was observed, and "B" indicates that bridging was observed.

[0102] As shown in Figure 15, it was found that the eccentric type is less prone to bridging compared to the concentric type.

[0103] 2.2. Second Variation Next, a three-dimensional molding apparatus according to a second modified example of this embodiment will be described. Hereinafter, the differences between the three-dimensional molding apparatus according to the second modified example of this embodiment and the three-dimensional molding apparatus 100 according to the embodiment described above will be explained, while similar points will be omitted from the explanation.

[0104] In the three-dimensional molding apparatus 100 described above, the material supplied from the storage unit 110 was ABS resin.

[0105] In contrast, in the injection molding apparatus according to the second modified example of this embodiment, the material supplied from the storage section 110 is a material other than ABS resin, or a material in which other components are added to ABS resin.

[0106] The materials supplied from the storage unit 110 include materials primarily composed of various materials such as thermoplastic materials, metallic materials, and ceramic materials. Here, "primary material" refers to the central material that forms the shape of the three-dimensional object, and means a material that accounts for 50% by mass or more of the three-dimensional object. The materials mentioned above include those obtained by melting the primary material alone, and those obtained by melting some of the components contained together with the primary material to form a paste.

[0107] Examples of thermoplastic materials include thermoplastic resins. Examples of thermoplastic resins include general-purpose engineering plastics and super engineering plastics.

[0108] Examples of general-purpose engineering plastics include polypropylene (PP), polyethylene (PE), polyacetal (POM), polyvinyl chloride (PVC), polyamide (PA), polylactic acid (PLA), polyphenylene sulfide (PPS), polycarbonate (PC), modified polyphenylene ether, polybutylene terephthalate, and polyethylene terephthalate.

[0109] Examples of super engineering plastics include polysulfone (PSU), polyethersulfone (PES), polyphenylene sulfide (PPS), polyarylate (PAR), polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), and polyetheretherketone (PEEK).

[0110] Thermoplastic materials may contain pigments, metals, ceramics, or other additives such as waxes, flame retardants, antioxidants, and heat stabilizers. In the plasticizing section 120, the thermoplastic material is plasticized and converted to a molten state by the rotation of the flat screw 130 and the heating of the heater 150. The resulting molded material is then deposited through the nozzle hole 170 and hardens as the temperature decreases. It is desirable that the thermoplastic material be heated above its glass transition point and completely molten before being extruded through the nozzle hole 170.

[0111] In the plasticizing section 120, instead of the thermoplastic material described above, a metal material may be used as the main material. In this case, it is desirable that the metal material is powdered and mixed with a component that melts during the formation of the molding material, and then introduced into the plasticizing section 120.

[0112] Examples of metallic materials include single metals such as magnesium (Mg), iron (Fe), cobalt (Co), chromium (Cr), aluminum (Al), titanium (Ti), copper (Cu), and nickel (Ni), or alloys containing one or more of these metals, as well as maraging steel, stainless steel, cobalt-chromium-molybdenum, titanium alloy, nickel alloy, aluminum alloy, cobalt alloy, and cobalt-chromium alloy.

[0113] In the plasticizing section 120, it is possible to use a ceramic material as the main material instead of the above-mentioned metal material. Examples of ceramic materials include oxide ceramics such as silicon dioxide, titanium dioxide, aluminum oxide, and zirconium oxide, and non-oxide ceramics such as aluminum nitride.

[0114] The metal or ceramic powder material supplied from the storage unit 110 may be a mixed material containing multiple types of single metal powders, alloy powders, or ceramic powders. Furthermore, the metal or ceramic powder material may be coated with, for example, the aforementioned thermoplastic resin or another thermoplastic resin. In this case, the thermoplastic resin may melt in the plasticizing unit 120 to achieve fluidity.

[0115] For example, a solvent can be added to the powder material of metal or ceramic material supplied from the storage unit 110. Examples of solvents include water; (poly)alkylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, and propylene glycol monoethyl ether; acetic acid esters such as ethyl acetate, n-propyl acetate, iso-propyl acetate, n-butyl acetate, and iso-butyl acetate; aromatic hydrocarbons such as benzene, toluene, and xylene; ketones such as methyl ethyl ketone, acetone, methyl isobutyl ketone, ethyl-n-butyl ketone, diisopropyl ketone, and acetylacetone; alcohols such as ethanol, propanol, and butanol; tetraalkylammonium acetates; sulfoxide solvents such as dimethyl sulfoxide and diethyl sulfoxide; pyridine solvents such as pyridine, γ-picoline, and 2,6-lutidine; tetraalkylammonium acetate (e.g., tetrabutylammonium acetate); and ionic liquids such as butyl carbitol acetate.

[0116] In addition, the powder materials of metal or ceramic materials supplied from the storage unit 110 may contain, for example, a binder. Examples of binders include acrylic resin, epoxy resin, silicone resin, cellulose resin or other synthetic resin, or PLA, PA, PPS, PEEK or other thermoplastic resins.

[0117] The embodiments and variations described above are examples only and are not limited thereto. For example, each embodiment and each variation can be combined as appropriate.

[0118] The present invention includes configurations substantially identical to those described in the embodiments, for example, configurations with the same function, method and results, or configurations with the same purpose and effect. Furthermore, the present invention includes configurations in which non-essential parts of the configurations described in the embodiments are replaced. Furthermore, the present invention includes configurations that produce the same effects or achieve the same purpose as the configurations described in the embodiments. Furthermore, the present invention adds known technology to the configurations described in the embodiments. Includes the configuration.

[0119] The following can be derived from the embodiments and modifications described above.

[0120] One embodiment of a three-dimensional modeling apparatus is: A stage having a deposition surface on which material is deposited, A discharge section having a tip portion in which a first nozzle hole and a second nozzle hole are formed adjacent to each other at a predetermined interval along a first axis parallel to the deposition surface, and discharging the material from the first nozzle hole and the second nozzle hole toward the stage, A position changing unit that changes the relative position between the stage and the discharge unit along a second axis parallel to the deposition surface and perpendicular to the first axis, A pressing section is positioned behind the discharge section in the direction of relative movement with respect to the stage, and presses the material accumulated on the stage. Includes, The pressing portion presses to connect the first deposited portion discharged and deposited from the first nozzle hole and the second deposited portion discharged from the second nozzle hole and deposited at a distance from the first deposited portion.

[0121] This three-dimensional molding device makes it possible to reduce the possibility of voids forming between the first and second deposited portions after they have been pressed by the pressing section.

[0122] In one embodiment of a three-dimensional modeling device, The discharge unit may discharge the material from a position where the tip portion does not come into contact with the material deposited on the stage.

[0123] This 3D printing device allows for the clean removal of air bubbles from the deposited material.

[0124] In one embodiment of a three-dimensional modeling device, The tip portion has individual flow channels that communicate with the first nozzle hole. The individual flow channels may have portions whose cross-sectional area decreases toward the first nozzle hole.

[0125] This 3D printing device makes it possible to reduce the amount of air bubbles incorporated into the material.

[0126] In one embodiment of a three-dimensional modeling device, The tip portion may have a heating element for heating the individual flow channels.

[0127] This three-dimensional molding device makes it possible to improve the adhesion between the first and second deposited portions after they have been pressed by the pressing section.

[0128] In one embodiment of a three-dimensional modeling device, The aforementioned tip portion is The heating section includes a first heating section and a second heating section provided closer to the first nozzle hole than the first heating section. A discharge adjustment unit is provided between the first heating unit and the second heating unit when viewed from the second axial direction, and adjusts the discharge amount from the first nozzle hole, It may have.

[0129] According to this 3D printing device, the first nozzle hole and the second nozzle hole are made of material in a high-temperature state. It can dispense.

[0130] In one embodiment of a three-dimensional modeling device, The heating section may also heat the pressing section.

[0131] This 3D printing device allows for a reduction in the number of parts.

[0132] In one embodiment of a three-dimensional modeling device, The aforementioned discharge section is A storage section for storing the aforementioned material, A plasticizing unit for plasticizing the material supplied from the storage unit, It has, The storage section is, The main body and A feeding section connected to the bottom of the main body, through which the material is supplied from the main body, It has, The input section has a first opening and a second opening, and the material supplied from the first opening is fed into the plasticizing section through the second opening. When viewed from above the main body, the position of the center of the first opening and the position of the center of the second opening may be different.

[0133] This 3D printing device makes it less likely for bridges to occur in the second opening.

[0134] In one embodiment of a three-dimensional modeling device, The storage section has a connecting pipe that connects the input section and the plasticizing section. The connecting pipe has a third opening that communicates with the second opening, The area of ​​the second opening may be less than or equal to the area of ​​the third opening.

[0135] This three-dimensional 3D printing device allows for more reliable guidance of the material passing through the second opening to the third opening. [Explanation of Symbols]

[0136] 2a...First deposition section, 2b...Second deposition section, 4...Common deposition section, 10...Discharge section, 20...Stage, 22...Deposition surface, 30...Position change section, 32...First electric actuator, 34...Second electric actuator, 36...Third electric actuator, 40...Control unit, 100...Three-dimensional molding device, 110...Storage section, 120...Plasticization section, 122...Screw case, 124...Drive motor, 126...Shaft, 130 …Flat screw, 131…Top surface, 132…Groove forming surface, 133…Side surface, 134…First groove, 135…Center part, 136…Connection part, 137…Material introduction part, 140…Barrel, 142…Opposite surface, 144…Second groove, 146…Communication hole, 148…Outer circumference, 150…Heater, 160…Tip part, 162…Base part, 164…Bottom surface, 170…Nozzle hole, 170a…First nozzle hole, 170b…Second nozzle hole, 172…Flow path, 17 3...Common channel, 174...Flow section, 175...First branch section, 176...Second branch section, 177...Third branch section, 178...Individual channel, 178a...First individual channel, 178b...Second individual channel, 179a...Expanded section, 179b...Narrowed section, 179c...Constant cross-sectional area section, 180...Discharge adjustment section, 180a...First discharge adjustment section, 180b...Second discharge adjustment section, 182...Insertion section, 184...Support section, 190...First pressing section, 192...Second pressing section Part, 194...Screw, 200...Three-dimensional molding device, 210...Main body, 212, 214...Opening, 216...Bottom, 220...Input section, 222...First opening, 224...Second opening, 226...Plate-shaped part, 227...First wall section, 228...Second wall section, 230...Connecting pipe, 232...Third opening, 240...Screw, 242...Bolt, 1002a...First deposition section, 1002b...Second deposition section, 1003...Non-contact section, 1170a...First nozzle hole, 1 170b...Second nozzle hole, 1222...First opening, 1224...Second opening

Claims

1. A stage having a deposition surface on which material is deposited, A discharge section having a tip portion in which a first nozzle hole and a second nozzle hole are formed adjacent to each other at a predetermined interval along a first axis parallel to the deposition surface, and discharging the material from the first nozzle hole and the second nozzle hole toward the stage, A position changing unit that changes the relative position between the stage and the discharge unit along a second axis parallel to the deposition surface and perpendicular to the first axis, The first pressing part and the second pressing part are attached to the tip and press the material accumulated on the stage, Includes, Viewed from a third axial direction perpendicular to the first and second axes, the first nozzle hole and the second nozzle hole are formed between the first pressing portion and the second pressing portion. The first pressing portion and the second pressing portion are arranged in the second axial direction, A three-dimensional molding apparatus wherein the first pressing part and the second pressing part press together a first deposited portion discharged and deposited from the first nozzle hole and a second deposited portion discharged from the second nozzle hole and deposited at a distance from the first deposited portion.

2. In claim 1, The discharge unit is a three-dimensional molding apparatus that discharges the material from a position where the tip does not come into contact with the material deposited on the stage.

3. In claim 1 or 2, The tip portion has a first discharge adjustment unit for adjusting the amount of discharge from the first nozzle hole, A first individual channel is formed at the tip portion, which communicates with the first nozzle hole. The first discharge adjustment unit has an insertion portion that is inserted into the first individual flow path, The first discharge adjustment unit is a three-dimensional molding apparatus that moves in the second axial direction.

4. In claim 3, The first individual flow path has a portion where the cross-sectional area decreases toward the first nozzle hole, in a three-dimensional molding apparatus.

5. In claim 4, The tip portion has a heating section for heating the first individual flow path, and is a three-dimensional molding apparatus.

6. In claim 5, The aforementioned tip portion is The heating section comprises a first heating section and a second heating section provided closer to the first nozzle hole than the first heating section. The three-dimensional molding apparatus is provided with the first discharge adjustment unit located between the first heating unit and the second heating unit when viewed from the second axial direction.

7. In claim 5, The heating section is a three-dimensional molding apparatus that heats the first pressing section.

8. In claim 1 or 2, The aforementioned discharge section is A storage section for storing the aforementioned material, A plasticizing unit for plasticizing the material supplied from the storage unit, It has, The storage section is, The main body and A feeding section connected to the bottom of the main body, through which the material is supplied from the main body, It has, The input section has a first opening and a second opening, and the material supplied from the first opening is fed into the plasticizing section through the second opening. A three-dimensional molding apparatus in which, when viewed from above the main body, the position of the center of the first opening and the position of the center of the second opening are different.

9. In claim 8, The storage section has a connecting pipe that connects the input section and the plasticizing section. The connecting pipe has a third opening that communicates with the second opening, A three-dimensional molding apparatus in which the area of ​​the second opening is less than or equal to the area of ​​the third opening.

10. In claim 3, The tip portion has a second discharge adjustment section for adjusting the amount of discharge from the second nozzle hole, A second individual channel is formed at the tip portion, which communicates with the second nozzle hole. The first discharge adjustment unit is moved to one of the second axial directions and inserted into the first individual flow path. A three-dimensional molding apparatus wherein the second discharge adjustment unit is moved to the other side in the second axial direction and inserted into the second individual flow path.

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