Three-dimensional shaping device

Abstract

To provide a three-dimensional molding apparatus capable of reducing a possibility of generation of warp and deformation on a molding material deposited in a second region.SOLUTION: A three-dimensional molding apparatus includes: a jetting part having a nozzle for jetting a molding material from a nozzle opening; a stage having a molding face on which the molding material is deposited; a heating part for heating the molding material deposited on the stage; and a control part for controlling the heating part. The heating part has a first region, and a second region nearer to an outer periphery of the heating part than the first region when viewed from a direction perpendicular to the molding face. The control part controls the heating part so that a temperature in the second region is higher than a temperature in the first region.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a three-dimensional modeling apparatus. [Background technology]

[0002] 2. Description of the Related Art Three-dimensional modeling devices are known that form a three-dimensional object by discharging and layering plasticized material and then curing it.

[0003] For example, Patent Document 1 describes a method for creating a three-dimensional object by extruding a thermoplastic material that has been heated and melted in a preheater from an extrusion nozzle that scans according to preset shape data onto a specific area on a base, and then layering further molten material on top of the hardened material on the base. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-192710 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, when creating a three-dimensional object by stacking materials, the material stacked on the base cools and shrinks, causing warping and deformation in the stacked material, which can affect the modeling accuracy. In particular, the material stacked on the outer periphery of the base is more susceptible to cooling and therefore more susceptible to warping and deformation. [Means for solving the problem]

[0006] One aspect of the three-dimensional printing apparatus according to the present invention is to a discharge unit having a nozzle that discharges a modeling material from a nozzle opening; a stage having a build surface on which the build material is deposited; a heating unit that heats the modeling material deposited on the stage; a control unit that controls the heating unit; Including, When viewed from a direction perpendicular to the modeling surface, the heating unit A first region; a second region closer to the outer periphery of the heating unit than the first region; and The control unit controls the heating unit to make the temperature of the second region higher than the temperature of the first region. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view schematically showing a three-dimensional modeling apparatus according to a first embodiment. [Figure 2] FIG. 1 is a cross-sectional view schematically showing a three-dimensional modeling apparatus according to a first embodiment. [Figure 3] FIG. 2 is a perspective view schematically showing a flat screw of the three-dimensional modeling apparatus according to the first embodiment. [Figure 4] FIG. 2 is a plan view schematically showing a barrel of the three-dimensional modeling apparatus according to the first embodiment. [Figure 5] FIG. 2 is a plan view schematically showing a first heating unit of the three-dimensional modeling apparatus according to the first embodiment. [Figure 6] FIG. 2 is a perspective view schematically showing a second heating unit of the three-dimensional modeling apparatus according to the first embodiment. [Figure 7] 5 is a flowchart for explaining processing by a control unit of the three-dimensional modeling apparatus according to the first embodiment. [Figure 8] FIG. 2 is a cross-sectional view illustrating a modeling layer forming process of the three-dimensional modeling apparatus according to the first embodiment. [Figure 9] FIG. 10 is a perspective view schematically showing a second heating unit of the three-dimensional modeling apparatus according to the second embodiment. [Figure 10] FIG. 11 is a perspective view schematically showing a second heating unit of a three-dimensional modeling apparatus according to a modified example of the second embodiment. [Figure 11] FIG. 11 is a cross-sectional view schematically showing a second heating unit of the three-dimensional modeling apparatus according to the third embodiment. [Figure 12] FIG. 11 is a cross-sectional view schematically showing a second heating unit of a three-dimensional modeling apparatus according to a modified example of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Preferred embodiments of the present invention will be described in detail below with reference to the drawings. Note that the embodiments described below do not unduly limit the content of the present invention as defined in the claims. Furthermore, not all of the configurations described below are necessarily essential components of the present invention.

[0009] 1. First embodiment 1.1. Three-dimensional printing equipment 1.1.1. Overall structure First, a three-dimensional modeling apparatus according to a first embodiment will be described with reference to the drawings. Fig. 1 is a perspective view schematically showing the three-dimensional modeling apparatus 100 according to the first embodiment. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1, schematically showing the three-dimensional modeling apparatus 100 according to the first embodiment.

[0010] 1 and 2, an X-axis, a Y-axis, and a Z-axis are shown as three mutually orthogonal axes. The X-axis and Y-axis directions are, for example, horizontal directions. The Z-axis direction is, for example, vertical directions.

[0011] 1 and 2, the three-dimensional modeling apparatus 100 includes, for example, a discharge unit 10, a stage 20, a moving mechanism 30, a support member 40, a heating unit 50, a first temperature sensor 60, a second temperature sensor 62, a third temperature sensor 64, and a control unit 70. For convenience, the temperature sensors 60, 62, and 64 are not shown in FIG.

[0012] The three-dimensional modeling apparatus 100 drives the movement mechanism 30 to change the relative positions of the discharge unit 10 and the stage 20 while discharging the plasticized modeling material from the discharge unit 10 toward the stage 20. In this way, the three-dimensional modeling apparatus 100 forms a three-dimensional object of a desired shape on the stage 20.

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

[0014] The discharge unit 10 includes, for example, a material supply unit 110, a plasticizing unit 120, and a nozzle 160.

[0015] Pellets or powdered materials are fed into the material supply unit 110. The material supply unit 110 supplies raw materials to the plasticization unit 120. The material supply unit 110 is configured by, for example, a hopper. The material supplied by the material supply unit 110 is, for example, acrylonitrile butadiene styrene (ABS) resin.

[0016] As shown in FIG. 2, the material supply unit 110 and the plasticizing unit 120 are connected by a supply path 112 provided below the material supply unit 110. The material fed into the material supply unit 110 is supplied to the plasticizing unit 120 via the supply path 112. In the illustrated example, "downward" refers to the -Z axis direction. "Upward" refers to the +Z axis direction.

[0017] The plasticizing unit 120 has, for example, a screw case 122, a drive motor 124, a flat screw 130, a barrel 140, and a barrel heater 150. The plasticizing unit 120 plasticizes the solid material supplied from the material supply unit 110 to generate a fluid, paste-like modeling material, which is then supplied to the nozzle 160.

[0018] Plasticization is a concept that includes melting, and refers to changing from a solid to a fluid state. Specifically, for materials that undergo glass transition, plasticization refers to raising the temperature of the material above the glass transition point. For materials that do not undergo glass transition, plasticization refers to raising the temperature of the material above the melting point.

[0019] The screw case 122 is a housing that houses 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 surrounded by the screw case 122 and the barrel 140.

[0020] The drive motor 124 is provided on the upper surface of the screw case 122. The drive motor 124 is, for example, a servo motor. A shaft 126 of the drive motor 124 is connected to an upper surface 131 of the flat screw 130. The drive motor 124 is controlled by the control unit 70. Although not shown, the shaft 126 of the drive motor 124 and the upper surface 131 of the flat screw 130 may be connected via a reducer.

[0021] The flat screw 130 has a generally cylindrical shape whose size in the direction of the rotation axis R is smaller than its size in the direction perpendicular to the direction of 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 about the rotation axis R.

[0022] The flat screw 130 has an upper surface 131, a groove-forming surface 132 opposite 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, FIG. 3 is a perspective view schematically showing the flat screw 130. For convenience, FIG. 3 shows a state in which the up-down positional relationship is reversed from the state shown in FIG. 2.

[0023] As shown in FIG. 3 , a first groove 134 is formed in 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 example shown, the connecting portion 136 is provided in a spiral shape from the central portion 135 toward the outer periphery of the groove forming surface 132. The material introduction portion 137 is provided on the outer periphery 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 material supply unit 110 is introduced into the first groove 134 from the material introduction unit 137, and is transported through the connection unit 136 and the central unit 135 to the communication hole 146 formed in the barrel 140. For example, two first grooves 134 are provided.

[0024] The number of first grooves 134 is not particularly limited. Although not shown, three or more first grooves 134 may be provided, or only one first groove 134 may be provided. Furthermore, although not shown, the three-dimensional modeling apparatus 100 may have an in-line screw instead of the flat screw 130.

[0025] As shown in Fig. 2, the barrel 140 is provided below the flat screw 130. The barrel 140 has an opposing surface 142 that faces the groove forming surface 132 of the flat screw 130. A communication hole 146 that communicates with the first groove 134 is formed in the center of the opposing surface 142. Here, Fig. 4 is a plan view that schematically shows the barrel 140.

[0026] As shown in FIG. 4 , second grooves 144 and communication holes 146 are formed on the opposing surface 142 of the barrel 140. A plurality of 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. The plurality of second grooves 144 are formed around the communication holes 146 when viewed from the Z-axis direction. One end of each second groove 144 is connected to the communication holes 146, and the second grooves 144 extend in a spiral shape from the communication holes 146 toward the outer periphery 148 of the barrel 140. The second grooves 144 have the function of guiding the plasticized modeling material to the communication holes 146.

[0027] The shape of the second groove 144 is not particularly limited, and may be linear, for example. One end of the second groove 144 does not have to be connected to the communicating hole 146. Furthermore, the second groove 144 does not have to be formed on the opposing surface 142. However, in consideration of efficiently guiding the plasticized molding material to the communicating hole 146, it is preferable that the second groove 144 be formed on the opposing surface 142.

[0028] As shown in FIG. 2, the barrel heater 150 is provided in the barrel 140. The barrel heater 150 heats the material supplied between the flat screw 130 and the barrel 140. The output of the barrel heater 150 is controlled by the control unit 70. The plasticizing unit 120 heats the material while transporting it toward the communicating holes 146 using the flat screw 130, the barrel 140, and the barrel heater 150 to generate a plasticized modeling material, and then causes the generated modeling material to flow out of the communicating holes 146. The barrel heater 150 may have a ring-like shape when viewed from the Z-axis direction. The barrel heater 150 may be omitted, in which case a heater may be located at a position different from the barrel 140.

[0029] The nozzle 160 is provided below the barrel 140. A nozzle flow path 162 is formed in the nozzle 160. The nozzle flow path 162 is connected to the communication hole 146. The modeling material is supplied to the nozzle flow path 162 from the communication hole 146. The nozzle flow path 162 has a nozzle opening 164. The nozzle 160 ejects the modeling material from the nozzle opening 164 toward the stage 20.

[0030] As shown in FIGS. 1 and 2, the stage 20 is provided below the nozzle 160. In the illustrated example, the shape of the stage 20 is a rectangular parallelepiped. The stage 20 has a build surface 22 on which the build material is deposited. The build surface 22 is an area on the upper surface of the stage 20. In the illustrated example, a perpendicular line P to the build surface 22 is parallel to the Z axis.

[0031] The stage 20 is made of a metal such as aluminum. The stage 20 may be made of a metal plate and an adhesive sheet attached to the metal plate. In this case, the modeling surface 22 is made of the adhesive sheet. The adhesive sheet can improve the adhesion between the stage 20 and the modeling material discharged from the discharge unit 10.

[0032] Although not shown, the stage 20 may be composed of a metal plate with grooves formed therein and a base layer provided to fill the grooves. In this case, the modeling surface 22 is composed of the base layer. The material of the base layer is, for example, the same as the modeling material. The base layer can improve adhesion between the stage 20 and the modeling material discharged from the discharge unit 10.

[0033] The movement mechanism 30 supports the stage 20. In the illustrated example, the movement mechanism 30 supports the stage 20 via the first heating unit 170 of the heating unit 50. The movement mechanism 30 changes the relative position between the nozzle 160 and the stage 20. In the illustrated example, the movement mechanism 30 moves the stage 20 in the X-axis direction and the Y-axis direction, thereby changing the relative position between the nozzle 160 and the stage 20 in the X-axis direction and the Y-axis direction. Furthermore, the movement mechanism 30 moves the discharge unit 10 in the Z-axis direction, thereby changing the relative position between the nozzle 160 and the stage 20 in the Z-axis direction.

[0034] The movement mechanism 30 has, 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. Note that the movement mechanism 30 only needs to be able to change the relative positions of the nozzle 160 and the stage 20. For example, the movement mechanism 30 may be configured to move the stage 20 in the Z-axis direction and move the discharge unit 10 in the X-axis and Y-axis directions, or may be configured to move the stage 20 or the discharge unit 10 in the X-axis, Y-axis, and Z-axis directions.

[0035] The support member 40 is connected to a third electric actuator 36. The support member 40 supports the discharge unit 10 and the second heating unit 180 of the heating unit 50. The movement mechanism 30 moves the support member 40 in the Z-axis direction using the third electric actuator 36, thereby moving the discharge unit 10 and the second heating unit 180 in the Z-axis direction.

[0036] 1.1.2. Heating section 1.1.2.1. 1st heating section The heating unit 50 heats the modeling material deposited on the modeling surface 22 of the stage 20. As shown in FIGS. 1 and 2, the heating unit 50 has a first heating unit 170. The first heating unit 170 is provided below the nozzle opening 164. The first heating unit 170 is provided below the modeling surface 22. The first heating unit 170 is supported by the movement mechanism 30. The first heating unit 170 is provided between the movement mechanism 30 and the stage 20. The first heating unit 170 moves in conjunction with the stage 20. The first heating unit 170 heats the stage 20.

[0037] As shown in FIG. 2, the first heating section 170 includes, for example, a heat insulating member 172, a lower plate 174, a heater 176, and an upper plate 178.

[0038] The heat insulating member 172 is provided on the movement mechanism 30. The heat insulating member 172 is provided between the movement mechanism 30 and a lower plate 174. The heat insulating member 172 has, for example, a plate shape. For example, a Roslim Board (registered trademark) is used as the heat insulating member 172. The heat insulating member 172 can reduce the heat of the heater 176 that is transmitted below the heat insulating member 172.

[0039] The lower plate 174 is provided on the heat insulating member 172. The lower plate 174 is provided between the heat insulating member 172 and the heater 176. The material of the lower plate 174 is, for example, aluminum. The upper and lower surfaces of the lower plate 174 are, for example, polished. This allows the lower plate 174 to reflect radiant heat from the heater 176 towards the stage 20.

[0040] The heater 176 is provided on the lower plate 174. The heater 176 is provided between the lower plate 174 and the upper plate 178. The heater 176 is fixed by being sandwiched between the lower plate 174 and the upper plate 178. The heater 176 is not bonded to the lower plate 174 with an adhesive. The heater 176 is not bonded to the upper plate 178 with an adhesive. The heater 176 is fixed by its own weight and the load of the upper plate 178. The heater 176 is, for example, a plate-shaped heater plate. For example, a rubber heater is used as the heater 176. The heater 176 heats the stage 20 via the upper plate 178.

[0041] The upper plate 178 is provided on the heater 176. The upper plate 178 is provided between the heater 176 and the stage 20. The stage 20 is provided on the upper plate 178. The upper plate 178 is made of, for example, aluminum. An oxide film, for example, is provided on the upper and lower surfaces of the upper plate 178. The oxide film makes it easier to trap radiant heat from the heater 176, allowing the stage 20 to be heated efficiently. The stage 20 is configured to be detachable. The upper plate 178 can prevent the heater 176 from being exposed when the stage 20 is removed.

[0042] 5 is a plan view that schematically shows the first heating section 170. For convenience, in FIG. 5, members other than the heater 176 of the first heating section 170 are not shown.

[0043] 5, when viewed in the Z-axis direction, the first heating section 170 has a first region 170a and a second region 170b that is closer to the outer periphery 179 of the first heating section 170 than the first region 170a. The planar shape of the first heating section 170 is, for example, a quadrilateral such as a rectangle or a square.

[0044] The first region 170a has the center of the first heating unit 170 when viewed from the Z-axis direction. The planar shape of the first region 170a is, for example, a quadrilateral such as a rectangle or a square. In the example shown, the planar shape of the first region 170a is a square. The size of the first region 170a in the X-axis direction and the size of the first region 170a in the Y-axis direction are, for example, approximately 150 mm.

[0045] The first region 170a does not have a heater 176. In the example shown in FIG. 2, the first region 170a is composed of a heat insulating member 172, a lower plate 174, and an upper plate 178. The heater 176 does not constitute the first region 170a. In the first region 170a, a gap 2 is formed between the lower plate 174 and the upper plate 178. The planar shape of the gap 2 is the same as the planar shape of the first region 170a.

[0046] The second region 170b is adjacent to the first region 170a. As shown in FIG. 5, the second region 170b surrounds the first region 170a when viewed in the Z-axis direction. The second region 170b has an outer periphery 179. The size of the second region 170b in the X-axis direction and the Y-axis direction is, for example, approximately 300 mm. The second region 170b has a heater 176. In the example shown in FIG. 2, the second region 170b is composed of a heat insulating member 172, a lower plate 174, a heater 176, and an upper plate 178.

[0047] During printing, the temperature of the second region 170b is higher than the temperature of the first region 170a. That is, the temperature of the surface of the second region 170b facing the printing surface 22 is higher than the temperature of the surface of the first region 170a facing the printing surface 22. In the illustrated example, the surface of the first region 170a facing the printing surface 22 and the surface of the second region 170b facing the printing surface 22 are formed by an upper plate 178.

[0048] 1.1.2.2. Second heating section 2, the heating unit 50 has a second heating unit 180. The second heating unit 180 is provided above the modeling surface 22. The second heating unit 180 is supported by a support member 40. The second heating unit 180 moves in conjunction with the nozzle 160.

[0049] The second heating section 180 is provided above the position of the nozzle opening 164 during modeling. A through-hole 182 is provided in the second heating section 180. The through-hole 182 penetrates the second heating section 180 in the Z-axis direction. During modeling, the nozzle 160 is positioned in the through-hole 182.

[0050] When viewed from the Z-axis direction, the second heating section 180 covers at least a portion of the modeling surface 22 when the nozzle opening 164 is located at the center of the stage 20. When viewed from the Z-axis direction, the second heating section 180 may cover only a portion of the modeling surface 22, or may cover the entire modeling surface 22. The second heating section 180 heats the modeling surface 22.

[0051] The second heating section 180 includes, for example, a heater 184 and a heat insulating member 186.

[0052] The heater 184 faces the printing surface 22. The heater 184 is provided between the printing surface 22 and the heat insulating member 186. The heater 184 is, for example, a plate-shaped heater plate. For example, a rubber heater is used as the heater 184. The heater 184 heats the printing surface 22.

[0053] The heat insulating member 186 is provided on the heater 184. The heat insulating member 186 is connected to the support member 40. The heat insulating member 186 has, for example, a plate shape. The heat insulating member 186 can reduce the heat of the heater 184 that is transmitted upward beyond the heat insulating member 186.

[0054] 6 is a perspective view schematically showing the second heating section 180. As shown in Fig. 6, the second heating section 180 has a first region 180a and a second region 180b that is closer to the outer periphery 188 of the second heating section 180 than the first region 180a when viewed from the Z-axis direction. The planar shape of the second heating section 180 is, for example, a quadrilateral such as a rectangle or a square.

[0055] 2 and 6, the heater 184 has, for example, a first portion 184a and a second portion 184b. The first portion 184a is the heater 184 in the first region 180a. The second portion 184b is the heater 184 in the second region 180b. In the illustrated example, the first portion 184a and the second portion 184b are connected to each other.

[0056] In the illustrated example, the first region 180a is made up of a first portion 184a and a heat insulating member 186. The second region 180b is made up of a second portion 184b and a heat insulating member 186.

[0057] The planar shape of the first region 180a is, for example, a quadrilateral such as a rectangle or a square. In the example shown in FIG. 6, the planar shape of the first region 180a is a square. The planar shape of the first region 180a is the same as the planar shape of the first portion 184a. The size of the first region 180a in the X-axis direction and the Y-axis direction is, for example, approximately 300 mm. The through-hole 182 is formed in the first region 180a.

[0058] The second region 180b is adjacent to the first region 180a. When viewed from the Z-axis direction, the second region 180b surrounds the first region 180a as shown in FIG. 6. The planar shape of the second region 180b is the same as the planar shape of the second portion 184b. The second region 180b is The size of the second region 180b in the X-axis direction is, for example, about 600 mm. The size of the second region 180b in the Y-axis direction is, for example, about 700 mm.

[0059] During printing, the temperature of the second region 180b is higher than the temperature of the first region 180a. That is, the temperature of the surface of the second region 180b facing the printing surface 22 is higher than the temperature of the surface of the first region 180a facing the printing surface 22. In the example shown in Fig. 2, the surface of the first region 180a facing the printing surface 22 and the surface of the second region 180b facing the printing surface 22 are configured with heaters 184.

[0060] Temperature Sensor 2, the first temperature sensor 60 is provided, for example, in the −X-axis direction of the heater 176. The first temperature sensor 60 is supported by a support portion (not shown). The first temperature sensor 60 detects the temperature of the heater 176.

[0061] The second temperature sensor 62 is supported by the heat insulating member 186. When viewed from the Z-axis direction, for example, the second temperature sensor 62 overlaps with the first portion 184a of the heater 184 of the second heating unit 180. The second temperature sensor 62 detects the temperature of the first portion 184a of the heater 184.

[0062] The third temperature sensor 64 is supported by the heat insulating member 186. When viewed from the Z-axis direction, for example, the third temperature sensor 64 overlaps with the second portion 184b of the heater 184 of the second heating unit 180. The third temperature sensor 64 detects the temperature of the second portion 184b of the heater 184. The temperature sensors 60, 62, and 64 are, for example, non-contact thermometers.

[0063] 1.1.4. Control Unit The control unit 70 is configured, for example, by a computer having a processor, a main memory device, and an input / output interface for inputting and outputting signals from and to the outside. The control unit 70 performs various functions, for example, by the processor executing a program loaded into the main memory device. Specifically, the control unit 70 controls the discharge unit 10, the movement mechanism 30, and the heating unit 50. Note that the control unit 70 may be configured not by a computer, but by a combination of multiple circuits.

[0064] Here, FIG. 7 is a flowchart for explaining the processing of the control unit 70.

[0065] First, as shown in FIG. 7, the control unit 70 performs, in step S1, a modeling data acquisition process for acquiring modeling data for forming a three-dimensional object.

[0066] The modeling data includes information regarding the type of material stored in the material supply unit 110, the movement path of the nozzle 160 relative to the stage 20, the amount of modeling material discharged from the nozzle 160, and the like.

[0067] The modeling data is created, for example, by loading shape data into slicer software installed on a computer connected to the 3D modeling apparatus 100. The shape data represents the target shape of a 3D object created using 3D Computer Aided Design (CAD) software, 3D Computer Graphics (CG) software, or the like. Examples of the shape data include Standard Triangulated Language (STL) format and Additive Manufacturing File Format (AMF). The slicer software divides the target shape of the 3D object into layers of a predetermined thickness and creates modeling data for each layer. The modeling data is expressed in G-code, M-code, or the like. The control unit 70 acquires the modeling data from a computer connected to the 3D modeling apparatus 100 or a recording medium such as a Universal Serial Bus (USB) memory.

[0068] Next, in step S2, the control unit 70 performs a modeling layer formation process in which a modeling material is discharged onto the modeling surface 22 of the stage 20 to form a modeling layer.

[0069] Specifically, the control unit 70 plasticizes the material supplied between the flat screw 130 and the barrel 140 to generate the modeling material, and then discharges the modeling material from the nozzle 160. The control unit 70 continues to generate the modeling material until, for example, the modeling layer formation process is completed.

[0070] Furthermore, the control unit 70 controls the first heating unit 170 to make the temperature of the second region 170b higher than the temperature of the first region 170a. The control unit 70 controls the output of the heater 176 based on the detection value of the first temperature sensor 60, for example.

[0071] The control unit 70 controls the second heating unit 180 to make the temperature of the second region 180b higher than the temperature of the first region 180a. The control unit 70 can individually control the output of the first portion 184a and the output of the second portion 184b of the heater 184. For example, the control unit 70 controls the output of the second portion 184b of the heater 184 so that the output is higher than the output of the first portion 184a of the heater 184. For example, the control unit 70 controls the power density of the second portion 184b of the heater 184 so that the power density is higher than the power density of the first portion 184a of the heater 184. The control unit 70 controls the output of the first portion 184a based on, for example, the detection value of the second temperature sensor 62. The control unit 70 controls the output of the second portion 184b based on, for example, the detection value of the third temperature sensor 64.

[0072] Here, FIG. 8 is a cross-sectional view for explaining the modeling layer forming process.

[0073] As shown in Figure 8, based on the acquired modeling data, the control unit 70 controls the moving mechanism 30 to change the relative position between the nozzle 160 and the stage 20, while controlling the discharge unit 10 to discharge the modeling material from the nozzle 160 toward the stage 20.

[0074] Specifically, before the formation of the first modeling layer L1, which is the modeling layer, begins, the nozzle 160 is positioned at an initial position in the -X-axis direction, closer to the end of the stage 20 in the -X-axis direction. When the modeling layer formation process begins, as shown in FIG. 7, the control unit 70 controls the movement mechanism 30 to move the nozzle 160 relative to the stage 20, for example, in the +X-axis direction. As the nozzle 160 passes over the stage 20, a modeling material is ejected from the nozzle 160. This forms the modeling layer L1. In FIG. 8, n is an arbitrary natural number, and up to the n-th modeling layer Ln are illustrated.

[0075] Next, as shown in FIG. 7, in step S3, the control unit 70 performs a determination process of determining whether or not the formation of all the modeling layers has been completed based on the modeling data.

[0076] If it is determined that the formation of all the modeling layers has not been completed ("NO" in step S3), the control unit 70 returns the process to step S2. The control unit 70 repeats steps S2 and S3 until it determines in step S3 that the formation of all the modeling layers has been completed.

[0077] On the other hand, if it is determined that the formation of all the modeling layers has been completed ("YES" in step S3), the control unit 70 ends the process.

[0078] 1.1.5. Effects In the three-dimensional modeling apparatus 100, the heating unit 50 has a first region 180a and a second region 180b that is closer to the outer periphery 188 of the heating unit 50 than the first region 180a, as viewed in the Z-axis direction, and the control unit 70 controls the heating unit 50 to adjust the temperature of the second region 180b to the temperature of the first region 180a. Make it higher than that.

[0079] Therefore, in the three-dimensional printing apparatus 100, compared to when the temperature of the second region is the same as the temperature of the first region, the temperature of the modeling material deposited in the second region 180b is prevented from becoming lower than the temperature of the modeling material deposited in the first region 180a due to the modeling material being cooled by the outside air, thereby reducing the possibility of warping or deformation of the modeling material deposited in the second region 180b.

[0080] In the three-dimensional modeling apparatus 100, the heating unit 50 has a first heating unit 170 provided below the nozzle opening 164, and the first heating unit 170 heats the stage 20. The second region 170b of the first heating unit 170 has a heater 176, and the first region 170a of the first heating unit 170 does not have a heater 176. Therefore, in the three-dimensional modeling apparatus 100, the temperature of the second region 170b of the first heating unit 170 can be made higher than the temperature of the first region 170a of the first heating unit 170.

[0081] In the three-dimensional printing apparatus 100, the heating unit 50 has a second heating unit 180 that is provided above the position of the nozzle opening 164 during printing, and the second heating unit 180 moves in conjunction with the nozzle opening 164, and covers at least a portion of the printing surface 22 when the nozzle opening 164 is located at the center of the stage 20 as viewed from the Z-axis direction. Therefore, in the three-dimensional printing apparatus 100, the second heating unit 180 can heat at least a portion of the printing surface 22.

[0082] In the three-dimensional modeling apparatus 100, the first region 180a and the second region 180b of the second heating unit 180 have heaters 184, and the control unit 70 controls the output of the heater 184 in the second region 180b to be greater than the output of the heater 184 in the first region 180a. Therefore, in the three-dimensional modeling apparatus 100, the temperature of the second region 180b of the second heating unit 180 can be made higher than the temperature of the first region 180a of the second heating unit 180.

[0083] The three-dimensional modeling device 100 includes a first temperature sensor 60 that detects the temperature of the heater 176, and the control unit 70 controls the output of the heater 176 based on the detected value of the first temperature sensor 60. Therefore, the three-dimensional modeling device 100 can control the output of the heater 176 based on the temperature of the heater 176.

[0084] In the three-dimensional modeling apparatus 100, the first heating unit 170 has a lower plate 174 and an upper plate 178, and the heater 176 serving as a heater plate is fixed by being sandwiched between the lower plate 174 and the upper plate 178. Therefore, in the three-dimensional modeling apparatus 100, the heater 176 is not fixed by adhesive, and therefore warping of the heater 176 due to the bimetal can be reduced.

[0085] 2. Second embodiment 2.1. Three-dimensional printing equipment Next, a three-dimensional printing apparatus according to a second embodiment will be described with reference to the drawings. Fig. 9 is a perspective view schematically showing a three-dimensional printing apparatus 200 according to the second embodiment. In the following, in the three-dimensional printing apparatus 200 according to the second embodiment, components having the same functions as those of the above-described three-dimensional printing apparatus 100 are designated by the same reference numerals, and detailed description thereof will be omitted.

[0086] 9, the three-dimensional modeling apparatus 200 differs from the above-described three-dimensional modeling apparatus 100 in that the thickness of the fourth portion 186b of the heat insulating member 186 is greater than the thickness of the third portion 186a. In the illustrated example, the "thickness" refers to the size in the Z-axis direction.

[0087] The heat insulating member 186 has a third portion 186a and a fourth portion 186b. The planar shape of the third portion 186a is, for example, the same as the planar shape of the first portion 184a. The planar shape of the fourth portion 186b is, for example, the same as the planar shape of the second portion 184b. In the illustrated example, the first region 180a is made up of the first portion 184a and the third portion 186a. The second region 180b is made up of the second portion 184b and the fourth portion 186b. The third portion 186a is the heat insulating member 186 of the first region 180a. The fourth portion 186b is the heat insulating member 186 of the second region 180b. In the illustrated example, the third portion 186a and the fourth portion 186b are connected to each other.

[0088] In the three-dimensional modeling device 200, the thickness of the heat insulating member 186 in the second region 180b is greater than the thickness of the heat insulating member 186 in the first region 180a. Therefore, in the three-dimensional modeling device 200, the temperature of the second region 180b of the second heating unit 180 can be made higher than the temperature of the first region 180a of the second heating unit 180, compared to when the thickness of the heat insulating member in the second region is the same as the thickness of the heat insulating member in the first region. For example, the control unit 70 can make the temperature of the second region 180b higher than the temperature of the first region 180a without making the output of the heater 184 in the second region 180b greater than the output of the heater 184 in the first region 180a.

[0089] Although not shown, the thickness of the heat insulating member 172 in the second region 170b of the first heating section 170 may be greater than the thickness of the heat insulating member 172 in the first region 170a of the first heating section 170.

[0090] 2.2. Variations Next, a 3D printing apparatus according to a modified example of the second embodiment will be described with reference to the drawings. Fig. 10 is a cross-sectional view schematically showing a 3D printing apparatus 210 according to a modified example of the second embodiment. In the 3D printing apparatus 210 according to the modified example of the second embodiment, components having the same functions as those of the above-described 3D printing apparatuses 100 and 200 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0091] As shown in FIG. 10, the three-dimensional modeling apparatus 210 differs from the above-described three-dimensional modeling apparatus 200 in that the thermal conductivity of the fourth portion 186b is lower than the thermal conductivity of the third portion 186a.

[0092] For example, Insultex Cloth (registered trademark) is used as the third portion 186a. For example, Roslim Board is used as the fourth portion 186b. The thickness of the third portion 186a and the thickness of the fourth portion 186b are the same, for example. Although not shown, the thickness of the fourth portion 186b may be greater or less than the thickness of the third portion 186a.

[0093] In the three-dimensional modeling device 210, the heating unit 50 includes a heat insulating member 186 and a heater 184 serving as a heater plate provided between the heat insulating member 186 and the modeling surface 22. The heat insulating member 186 in the second region 180b has a lower thermal conductivity than the heat insulating member 186 in the first region 180a. Therefore, in the three-dimensional modeling device 210, the temperature of the second region 180b of the second heating unit 180 can be made higher than the temperature of the first region 180a of the second heating unit 180, compared to when the heat insulating member in the second region has the same thermal conductivity as the heat insulating member in the first region. For example, the control unit 70 can make the temperature of the second region 180b higher than the temperature of the first region 180a, even if the output of the heater 184 in the second region 180b is not greater than the output of the heater 184 in the first region 180a.

[0094] The thermal conductivity of the heat insulating member 172 in the second region 170b of the first heating unit 170 may be lower than the thermal conductivity of the heat insulating member 172 in the first region 170a of the first heating unit 170. stomach.

[0095] 3. Third embodiment 3.1. Three-dimensional printing equipment Next, a three-dimensional printing apparatus according to a third embodiment will be described with reference to the drawings. Fig. 11 is a cross-sectional view schematically showing a three-dimensional printing apparatus 300 according to the third embodiment. In the three-dimensional printing apparatus 300 according to the third embodiment, components having the same functions as those of the above-described three-dimensional printing apparatus 100 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0096] As shown in FIG. 11, the three-dimensional modeling apparatus 300 differs from the above-described three-dimensional modeling apparatus 100 in the configuration of the second heating unit 180.

[0097] As shown in FIG. 11, the second heating unit 180 of the three-dimensional modeling apparatus 300 includes, for example, a lower plate 380, a heater 184, an upper plate 382, ​​a heat insulating member 186, a reinforcing member 384, and a radiation heat suppressing member 386.

[0098] The lower plate 380 faces the modeling surface 22 of the stage 20. The lower plate 380 is made of, for example, aluminum. The upper and lower surfaces of the lower plate 380 are provided with, for example, an oxide film. The oxide film makes it easier for radiant heat from the heater 184 to be trapped, allowing the modeling material deposited on the modeling surface 22 to be heated efficiently.

[0099] The heater 184 is provided on the lower plate 380. The heater 184 is provided between the lower plate 380 and the upper plate 382. The heater 184 is fixed by being sandwiched between the lower plate 380 and the upper plate 382. The heater 184 is not bonded to the lower plate 380 with an adhesive. The heater 184 is not bonded to the upper plate 382 with an adhesive. The heater 184 is fixed in place by its own weight and the load of the upper plate 382.

[0100] The upper plate 382 is provided on the heater 184. The upper plate 382 is provided between the heater 184 and the heat insulating member 186. The upper plate 382 is made of, for example, aluminum. The upper and lower surfaces of the upper plate 382 are, for example, polished mirror surfaces. This allows the radiant heat from the heater 184 to be reflected toward the printing surface 22.

[0101] The heat insulating member 186 is provided on the upper plate 382. The heat insulating member 186 is provided between the upper plate 382 and the radiant heat suppressing member 386. The heat insulating member 186 has, for example, a cotton-like shape. By using a cotton-like heat insulating member 186, it is possible to achieve a lighter weight than when, for example, a plate-shaped heat insulating member is used. The heat insulating member 186 is made of, for example, AES (alkaline earth silicate) wool.

[0102] The reinforcing member 384 is provided on the upper plate 382. The reinforcing member 384 is provided between the upper plate 382 and the radiant heat suppressing member 386. The reinforcing member 384 is connected to the upper plate 382 and the radiant heat suppressing member 386. The material of the reinforcing member 384 is, for example, SUS (Steel Use Stainless). The reinforcing member 384 reinforces the second heating unit 180.

[0103] The radiant heat suppressing member 386 is provided on the heat insulating member 186 and the reinforcing member 384. For example, aluminum foil is used as the radiant heat suppressing member 386. The heater 184 is provided on the printing surface. 22 and the radiant heat suppressing member 386. The radiant heat suppressing member 386 suppresses the transmission of radiant heat from the heater 184 to the side opposite the printing surface 22. The lower surface of the radiant heat suppressing member 386 is, for example, a polished mirror surface. This allows the radiant heat suppressing member 386 to reflect radiant heat from the heater 184 toward the printing surface 22. An oxide film may be provided on the upper surface of the radiant heat suppressing member 386.

[0104] In the three-dimensional modeling apparatus 300, the heating unit 50 has a lower plate 380 and an upper plate 382, ​​and the heater 184 serving as a heater plate is fixed by being sandwiched between the lower plate 380 and the upper plate 382. Therefore, in the three-dimensional modeling apparatus 300, the heater 184 is not fixed by adhesive, and therefore warping of the heater 184 due to the bimetal can be reduced.

[0105] In the three-dimensional printing apparatus 300, the heating unit 50 has a radiation heat suppression member 386 on the side opposite the printing surface 22 that suppresses the transmission of radiation heat from the heater 184 as a heater plate, and the heater 184 is provided between the printing surface 22 and the radiation heat suppression member 386. Therefore, in the three-dimensional printing apparatus 300, the printing material deposited on the printing surface 22 can be heated more efficiently than in a case where a radiation heat suppression member is not provided.

[0106] Although not shown, the first heating unit 170 may have a radiation heat suppressing member on the side opposite to the modeling surface 22, which suppresses the transmission of radiation heat from the heater 176.

[0107] 3.2. Variations Next, a 3D printing apparatus according to a modified example of the third embodiment will be described with reference to the drawings. Fig. 12 is a cross-sectional view schematically showing a 3D printing apparatus 310 according to a modified example of the third embodiment. In the 3D printing apparatus 310 according to the modified example of the third embodiment, components having the same functions as those of the above-described 3D printing apparatuses 100 and 300 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0108] As shown in FIG. 12, the three-dimensional modeling apparatus 310 differs from the above-described three-dimensional modeling apparatus 300 in the configuration of the second heating unit 180.

[0109] As shown in FIG. 12, the second heating unit 180 of the three-dimensional modeling apparatus 310 includes, for example, a lower plate 380, a heater 184, a radiant heat suppressing member 386, a heat insulating member 386, and a cover 388.

[0110] The heater 184 is provided between the lower plate 380 and the radiant heat suppressing member 386. The radiant heat suppressing member 386 is provided on the heater 184. The radiant heat suppressing member 386 is provided between the heater 184 and the heat insulating member 186. The heat insulating member 186 is provided on the radiant heat suppressing member 386. The heat insulating member 186 is provided between the radiant heat suppressing member 386 and the cover 388. The heat insulating member 186 has a plate shape. For example, a Roslim board is used as the heat insulating member 186. The cover 388 is provided on the heat insulating member 186. The material of the cover 388 is, for example, plastic.

[0111] 4. Fourth embodiment Next, a three-dimensional modeling apparatus according to a fourth embodiment will be described.

[0112] Hereinafter, in the 3D modeling apparatus according to the fourth embodiment, differences from the example of the 3D modeling apparatus 100 according to the first embodiment will be described, and a description of similarities will be omitted.

[0113] In the above-described three-dimensional modeling apparatus 100, the material supplied from the material supply unit 110 is ABS It was resin.

[0114] In contrast, in the three-dimensional modeling apparatus according to the fourth embodiment, the material supplied from the material supply unit 110 is a material other than ABS resin, or a material in which other components are added to ABS resin.

[0115] Examples of materials supplied from the material supply unit 110 include materials containing various materials as main components, such as thermoplastic materials, metal materials, and ceramic materials. Here, the term "main material" refers to the material that forms the core of the shape of the object, and refers to a material that accounts for 50% by mass or more of the object. The above-mentioned materials include those obtained by melting the main material alone, and those obtained by melting some of the components contained in the main material and turning it into a paste.

[0116] Examples of the thermoplastic material that can be used include thermoplastic resins, such as general-purpose engineering plastics and super engineering plastics.

[0117] 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.

[0118] Examples of super engineering plastics include polysulfone (PSU), polyethersulfone (PES), polyphenylene sulfide (PPS), polyarylate (PAR), polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), and polyetheretherketone (PEEK).

[0119] The thermoplastic material may contain pigments, metals, ceramics, and other additives such as wax, flame retardants, antioxidants, and thermal stabilizers. The thermoplastic material is plasticized and converted into a molten state in the plasticizing unit 120 by the rotation of the flat screw 130 and the heating of the barrel heater 150. The modeling material thus produced is deposited from the nozzle 160 and then hardened by a decrease in temperature. The thermoplastic material is preferably heated above its glass transition point and ejected from the nozzle 160 in a completely molten state.

[0120] In place of the thermoplastic material described above, for example, a metal material may be used as the main material in the plasticizing unit 120. In this case, it is desirable that a powder material made by powdering the metal material is mixed with a component that melts when generating the modeling material, and then introduced into the plasticizing unit 120.

[0121] Examples of metal 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 alloys, nickel alloys, aluminum alloys, cobalt alloys, and cobalt-chromium alloys.

[0122] Instead of the above-mentioned metal materials, ceramic materials can be used as the main material in the plasticizing section 120. Examples of ceramic materials include oxide ceramics such as silicon dioxide, titanium dioxide, aluminum oxide, and zirconium oxide, and aluminum nitride. Examples include non-oxide ceramics such as tungsten.

[0123] The powder material of the metallic material or ceramic material supplied from the material supply unit 110 may be a mixed material obtained by mixing multiple types of powder of a single metal, alloy powder, or ceramic material. The powder material of the metallic material or ceramic material may also be coated with, for example, the thermoplastic resin described above or other thermoplastic resins. In this case, the thermoplastic resin may be melted in the plasticizing unit 120 to exhibit fluidity.

[0124] A solvent, for example, may be added to the powder material of the metal material or ceramic material supplied from the material supply unit 110. Examples of the solvent 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; acetate esters such as ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, and isobutyl 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-based solvents such as dimethyl sulfoxide and diethyl sulfoxide; pyridine-based solvents such as pyridine, γ-picoline, and 2,6-lutidine; tetraalkylammonium acetates (e.g., tetrabutylammonium acetate); and ionic liquids such as butyl carbitol acetate.

[0125] Additionally, for example, a binder may be added to the powder material of the metal material or ceramic material supplied from the material supply unit 110. Examples of binders include acrylic resin, epoxy resin, silicone resin, cellulose-based resin, other synthetic resins, PLA, PA, PPS, PEEK, and other thermoplastic resins.

[0126] The above-described embodiment and modifications are merely examples, and the present invention is not limited to these. For example, the embodiments and modifications can be combined as appropriate.

[0127] The present invention includes configurations that are substantially the same as the configurations described in the embodiments, for example, configurations with the same functions, methods, and results, or configurations with the same purpose and effects. The present invention also includes configurations that replace non-essential parts of the configurations described in the embodiments. The present invention also includes configurations that achieve the same effects or purposes as the configurations described in the embodiments. The present invention also includes configurations that add publicly known technology to the configurations described in the embodiments.

[0128] The following can be derived from the above-described embodiment and modifications.

[0129] One aspect of the three-dimensional printing apparatus is a discharge unit having a nozzle that discharges a modeling material from a nozzle opening; a stage having a build surface on which the build material is deposited; a heating unit that heats the modeling material deposited on the stage; a control unit that controls the heating unit; Including, When viewed from a direction perpendicular to the modeling surface, the heating unit A first region; a second region closer to the outer periphery of the heating unit than the first region; and The control unit controls the heating unit to make the temperature of the second region higher than the temperature of the first region.

[0130] This three-dimensional modeling apparatus can reduce the possibility that the modeling material deposited in the second area will be warped or deformed.

[0131] In one aspect of the three-dimensional printing apparatus, the heating unit has a first heating unit provided below the nozzle opening, the first heating unit heats the stage, the second region of the first heating unit has a heater, The first region of the first heating unit may not have a heater.

[0132] According to this three-dimensional modeling apparatus, the temperature of the second region of the first heating unit can be made higher than the temperature of the first region of the first heating unit.

[0133] In one aspect of the three-dimensional printing apparatus, The heating unit has a second heating unit provided above the position of the nozzle opening during modeling, The second heating section may move in conjunction with the nozzle opening, and may cover at least a portion of the modeling surface when the nozzle opening is positioned at the center of the stage when viewed from the perpendicular direction.

[0134] According to this three-dimensional modeling apparatus, at least a part of the modeling surface can be heated by the second heating section.

[0135] In one aspect of the three-dimensional printing apparatus, the first region and the second region of the second heating unit have heaters, The control unit may control the heater in the second region so that the output of the heater is greater than the output of the heater in the first region.

[0136] According to this three-dimensional modeling apparatus, the temperature of the second region of the second heating unit can be made higher than the temperature of the first region of the second heating unit.

[0137] In one aspect of the three-dimensional printing apparatus, a temperature sensor for detecting the temperature of the heater; The control unit may control an output of the heater based on a detected value of the temperature sensor.

[0138] According to this three-dimensional modeling apparatus, the output of the heater can be controlled based on the temperature of the heater.

[0139] In one aspect of the three-dimensional printing apparatus, The heating unit is A heat insulating member; a heater plate provided between the heat insulating member and the building surface; and The thickness of the heat insulating member in the second region may be greater than the thickness of the heat insulating member in the first region.

[0140] According to this three-dimensional modeling apparatus, the temperature of the second region of the second heating unit is controlled by the temperature of the first region of the second heating unit. The temperature can be higher than that of the

[0141] In one aspect of the three-dimensional printing apparatus, The heating unit is A heat insulating member; a heater plate provided between the heat insulating member and the building surface; and The thermal conductivity of the heat insulating member in the second region may be lower than the thermal conductivity of the heat insulating member in the first region.

[0142] According to this three-dimensional modeling apparatus, the temperature of the second region of the second heating unit can be made higher than the temperature of the first region of the second heating unit.

[0143] In one aspect of the three-dimensional printing apparatus, the heating unit has a first plate and a second plate, The heater plate may be fixed by being sandwiched between the first plate and the second plate.

[0144] This three-dimensional modeling apparatus can reduce the warping of the heater caused by the bimetal.

[0145] In one aspect of the three-dimensional printing apparatus, the heating unit has a radiation heat suppression member on the opposite side of the modeling surface that suppresses transmission of radiation heat from the heater plate, The heater plate may be provided between the modeling surface and the radiant heat suppressing member.

[0146] This three-dimensional modeling apparatus can efficiently heat the modeling material deposited on the modeling surface. [Explanation of symbols]

[0147] 2...gap, 10...discharge section, 20...stage, 22...printing surface, 30...movement mechanism, 32...first electric actuator, 34...second electric actuator, 36...third electric actuator, 40...support member, 50...heating section, 60...first temperature sensor, 62...second temperature sensor, 64...third temperature sensor, 70...control section, 100...three-dimensional printing device, 110...material supply section, 112...supply path, 120...plasticization section, 122...screw case, 124...drive motor, 126...shaft, 130...flat screw, 131...upper surface, 132...groove forming surface, 133...side surface, 134...first groove, 135...center section, 136...connection section, 137...material introduction section, 140...barrel, 142...opposing surface, 144...second groove, 146...communicating hole, 148...periphery, 150...barrel heater, 160...nozzle, 162...nozzle flow path, 164...nozzle opening, 170...first heating section, 170a...first region, 170b...second region, 172...insulating member, 174...lower plate, 176...heater, 178...upper plate, 179...periphery, 180...second heating section, 180a...first region, 18 0b...second region, 182...through hole, 184...heater, 184a...first portion, 184b...second portion, 186...heat insulating member, 186a...third portion, 186b...fourth portion, 188...periphery, 200, 210, 300, 310...three-dimensional printing device, 380...lower plate, 382...upper plate, 384...reinforcement member, 386...radiation heat suppression member, 388...cover

Claims

1. a discharge unit having a nozzle that discharges a modeling material from a nozzle opening; a stage having a build surface on which the build material is deposited; a heating unit that heats the modeling material deposited on the stage; a control unit that controls the heating unit; Including, When viewed from a direction perpendicular to the modeling surface, the heating unit A first region; a second region closer to the outer periphery of the heating unit than the first region; and the control unit controls the heating unit to make the temperature of the second region higher than the temperature of the first region; the heating unit has a first heating unit provided below the nozzle opening, the first heating unit heats the stage, the second region of the first heating unit has a heater, a first region of the first heating unit that does not have a heater;

2. a discharge unit having a nozzle that discharges a modeling material from a nozzle opening; a stage having a build surface on which the build material is deposited; a heating unit that heats the modeling material deposited on the stage; a control unit that controls the heating unit; Including, When viewed from a direction perpendicular to the modeling surface, the heating unit A first region; a second region closer to the outer periphery of the heating unit than the first region; and the control unit controls the heating unit to make the temperature of the second region higher than the temperature of the first region; The heating unit has a second heating unit provided above the position of the nozzle opening during modeling. death, the second heating unit moves in conjunction with the nozzle opening and covers at least a portion of the modeling surface when the nozzle opening is located at the center of the stage as viewed from the perpendicular direction; the first region and the second region of the second heating unit have heaters, The control unit controls the heater in the second region so that the heater output is greater than the heater output in the first region.

3. a discharge unit having a nozzle that discharges a modeling material from a nozzle opening; a stage having a build surface on which the build material is deposited; a heating unit that heats the modeling material deposited on the stage; a control unit that controls the heating unit; Including, When viewed from a direction perpendicular to the modeling surface, the heating unit A first region; a second region closer to the outer periphery of the heating unit than the first region; and the control unit controls the heating unit to make the temperature of the second region higher than the temperature of the first region; The heating unit is A heat insulating member; a heater plate provided between the heat insulating member and the building surface; and a thermal conductivity of the heat insulating member in the second region being lower than a thermal conductivity of the heat insulating member in the first region.

4. a discharge unit having a nozzle that discharges a modeling material from a nozzle opening; a stage having a build surface on which the build material is deposited; a heating unit that heats the modeling material deposited on the stage; a control unit that controls the heating unit; Including, When viewed from a direction perpendicular to the modeling surface, the heating unit A first region; a second region closer to the outer periphery of the heating unit than the first region; and the control unit controls the heating unit to make the temperature of the second region higher than the temperature of the first region; The heating unit is A heat insulating member; a heater plate provided between the heat insulating member and the building surface; A first plate and a second plate, and The thickness of the heat insulating member in the second region is greater than the thickness of the heat insulating member in the first region, the heater plate is fixed by being sandwiched between the first plate and the second plate.

5. a discharge unit having a nozzle that discharges a modeling material from a nozzle opening; a stage having a build surface on which the build material is deposited; a heating unit that heats the modeling material deposited on the stage; a control unit that controls the heating unit; Including, When viewed from a direction perpendicular to the modeling surface, the heating unit A first region; a second region closer to the outer periphery of the heating unit than the first region; and the control unit controls the heating unit to make the temperature of the second region higher than the temperature of the first region; The heating unit is A heat insulating member; a heater plate provided between the heat insulating member and the building surface; a radiation heat suppressing member that suppresses transmission of radiation heat from the heater plate to the side opposite the build surface; and The thickness of the heat insulating member in the second region is greater than the thickness of the heat insulating member in the first region, The heater plate is provided between the modeling surface and the radiant heat suppressing member.

6. In claim 1, the heating unit has a second heating unit provided above a position of the nozzle opening during modeling, The second heating unit moves in conjunction with the nozzle opening and covers at least a portion of the modeling surface when the nozzle opening is positioned at the center of the stage when viewed from the perpendicular direction.

7. In claim 1 or 2, a temperature sensor for detecting the temperature of the heater; The control unit controls an output of the heater based on a detected value of the temperature sensor.

8. In claim 1, The heating unit is A heat insulating member; a heater plate provided between the heat insulating member and the building surface; and a thickness of the heat insulating member in the second region being greater than a thickness of the heat insulating member in the first region.

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