JP2019142157A - Molding device and molding method - Google Patents

Abstract

To provide a device for molding a support part capable of efficient removing.SOLUTION: A device includes molding means for molding a three-dimensional molding article constituted by including a model part and a support part, and the molding means molds the support part while embedding information relating to removal of the support part. Further, the molding means molds the support part at the lower part of an overhang part of the model part.SELECTED DRAWING: Figure 13

Description

  The present invention relates to a modeling apparatus and a modeling method.

  3D printers are becoming widespread as apparatuses capable of producing a large number of types of shaped articles without using a mold or the like. 3D printers using a hot melt lamination method (hereinafter abbreviated as FFF (Fused Filament Fabrication)) have recently been price-reduced and have become popular for consumers. In order to prevent a decrease in strength in the stacking direction of the three-dimensional structure, a technique for roughing and stacking the surface of the layer is known.

  Depending on the shape of the three-dimensional structure, the external shape may collapse due to its own weight, which may reduce the modeling accuracy. In patent document 1, in order to prevent the external shape from collapsing due to its own weight during the modeling process, a technique is shown in which a support portion is provided under the projecting portion of the three-dimensional structure.

  However, there has been a problem that the support part cannot be efficiently removed after the three-dimensional structure has been formed.

According to the present invention,
Having a modeling means for modeling a three-dimensional structure including the model part and the support part;
In the modeling of the support unit, the modeling unit embeds information related to the removal of the support unit and models the modeling unit.

  According to the present invention, there is an effect that the support portion can be efficiently removed.

It is a schematic diagram which shows the structure of the three-dimensional modeling apparatus which concerns on one Embodiment. It is a schematic diagram which shows the cross section of the discharge module in the three-dimensional modeling apparatus of FIG. It is a hardware block diagram of the three-dimensional modeling apparatus which concerns on one Embodiment. It is a schematic diagram which shows an example of the operation | movement which heats a lower layer. It is the top view which looked at the heating module in one embodiment from the modeling table side. It is a schematic diagram which shows the state of the molded article at the time of upper layer formation. It is a schematic diagram which shows the state of the molded article at the time of upper layer formation. It is a schematic diagram which shows the state of the molded article at the time of upper layer formation. It is a schematic diagram which shows the state of the molded article at the time of upper layer formation. It is a schematic diagram which shows an example of the reheating range in this embodiment. It is a figure which shows the example of the three-dimensional structure containing an overhang part. It is a functional block diagram of the three-dimensional modeling apparatus which concerns on one Embodiment. It is a figure which shows the example of the various three-dimensional structure provided with the support part which embedded information. It is a flowchart which shows the modeling process which concerns on one Embodiment. It is a schematic diagram which shows the operation | movement of the lower layer heating in one Embodiment. It is a schematic diagram which shows the operation | movement of the lower layer heating in one Embodiment. It is a schematic diagram which shows the operation | movement of the lower layer heating in one Embodiment. It is a schematic diagram which shows the operation | movement of the lower layer heating in one Embodiment. It is sectional drawing which shows an example of the filament which made the material structure unevenly distributed. It is sectional drawing of the discharge material of the filament of FIG. It is sectional drawing of the molded article shape | molded using the filament of FIG. It is a schematic diagram which shows an example of the three-dimensional modeling apparatus which has a control means. It is a flowchart which shows an example of the process which controls the direction of a filament. It is a mimetic diagram showing modeling and surface treatment operation in one embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<<< Overall structure >>>
As an embodiment of the present invention, a three-dimensional modeling apparatus that models a three-dimensional modeled object by hot melt lamination (FFF) will be described. Note that the 3D modeling apparatus in the present embodiment is not limited to the one using the hot melt lamination method (FFF), and is an arbitrary model that models a 3D model on the mounting surface of the mounting table by the modeling unit. The modeling method may be used.

  FIG. 1 is a schematic diagram illustrating a configuration of a three-dimensional modeling apparatus according to an embodiment. FIG. 2 is a schematic diagram showing a cross section of the discharge module in the three-dimensional modeling apparatus of FIG. The three-dimensional modeling apparatus 1 can model a three-dimensional modeled object that has a complicated mold or cannot be molded by injection molding.

  The interior of the housing 2 in the 3D modeling apparatus 1 is a processing space for modeling the 3D model M. A modeling table 3 as a mounting table is provided inside the housing 2, and a three-dimensional model M is modeled on the modeling table 3.

  For the modeling, a long filament F made of a resin composition using a thermoplastic resin as a matrix is used. The filament F is an elongated wire-shaped solid material, and is set on a reel 4 outside the casing 2 in the three-dimensional modeling apparatus 1 in a wound state. When the reel 4 is pulled by the rotation of the extruder 11 that is a driving means of the filament F, the reel 4 rotates without exerting a great resistance.

  Above the modeling table 3 inside the housing 2, a discharge module 10 (modeling head) is provided as a modeling material discharge member. The discharge module 10 is modularized by an extruder 11, a cooling block 12, a filament guide 14, a heating block 15, a discharge nozzle 18, an imaging module 101, a torsion rotating mechanism 102, and other components. The filament F is supplied to the discharge module 10 of the three-dimensional modeling apparatus 1 by being drawn by the extruder 11.

  The imaging module 101 captures a 360 ° image of the filament F drawn into the ejection module 10, that is, an image in all directions of a certain part of the filament F. Although the two imaging modules are provided in the ejection module in FIG. 2, for example, a 360 ° image of the filament F may be captured by one imaging module 101 by using a reflector. The imaging module 101 is exemplified by a camera including an imaging optical system such as a lens and an imaging element such as a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor.

  The torsion rotating mechanism 102 is constructed by a roller, and regulates the direction of the filament F by rotating the filament F drawn into the discharge module 10 in the width direction. The diameter measuring unit 103 measures the width between the filament edges in the two directions of the X axis and the Y axis as diameters from the filament image captured by the imaging module 101, and detects a non-standard diameter. Output error information. The output destination of the error information may be a display, a speaker, or another device. The diameter measuring unit 103 may be a circuit or a function realized by processing of a CPU.

  The heating block 15 has a heat source 16 such as a heater, and a thermocouple 17 for controlling the temperature of the heater, and heats and melts the filament F supplied to the discharge module 10 via the transfer path, Supply to the discharge nozzle 18.

  The cooling block 12 is provided above the heating block 15. The cooling block 12 has a cooling source 13 and cools the filament. Thereby, the cooling block 12 prevents backflow of the melted filament FM to the upper part in the discharge module 10, an increase in resistance for pushing out the filament, or clogging in the transfer path due to solidification of the filament. A filament guide 14 is provided between the heating block 15 and the cooling block 12.

  As shown in FIGS. 1 and 2, a discharge nozzle 18 that discharges a filament F that is a modeling material is provided at the lower end of the discharge module 10. The discharge nozzle 18 discharges the melted or semi-molten filament FM supplied from the heating block 15 in a linear manner onto the modeling table 3. The discharged filament FM is cooled and solidified to form a layer having a predetermined shape. Further, the discharge nozzle 18 stacks and stacks new layers on the formed layer by repeating the operation of discharging the melted or semi-molten filament FM in a linear manner. Thereby, a three-dimensional structure is obtained.

  In the present embodiment, the discharge module 10 is provided with two discharge nozzles. The first discharge nozzle melts and discharges the filament of the model material constituting the three-dimensional structure, and the second discharge nozzle melts and discharges the filament of the support material. In FIG. 1, a second discharge nozzle is disposed on the back side of the first discharge nozzle. The number of discharge nozzles is not limited to two and is arbitrary.

  The support material discharged from the second discharge nozzle is usually a material different from the model material constituting the three-dimensional structure. The support portion formed by the support material is finally removed from the model portion formed by the model material. The filaments of the support material and the filaments of the model material are respectively melted in the heating block 15 and discharged so as to be pushed out from the respective discharge nozzles 18 and are sequentially laminated in layers.

  The three-dimensional modeling apparatus 1 is provided with a heating module 20 that heats the lower layer of the layer being formed by the discharge module 10. The heating module is provided with a laser light source 21 for irradiating a laser. The laser light source 21 irradiates a laser at a position immediately before the filament FM in the lower layer is discharged. Although it does not specifically limit as a laser light source, A semiconductor laser is illustrated and 445 nm is illustrated as a laser irradiation wavelength.

  The discharge module 10 and the heating module 20 are slidably held via a connecting member with respect to an X-axis drive shaft 31 (X-axis direction) extending in the apparatus left-right direction (left-right direction in FIG. 1 = X-axis direction). Has been. The discharge module 10 can move in the left-right direction of the apparatus (X-axis direction) by the driving force of the X-axis drive motor 32.

  The X-axis drive motor 32 is held so as to be slidable along a Y-axis drive shaft (Y-axis direction) extending in the front-rear direction of the apparatus (depth direction = Y-axis direction in FIG. 1). As the X-axis drive shaft 31 moves along the Y-axis direction together with the X-axis drive motor 32 by the driving force of the Y-axis drive motor 33, the discharge module 10 and the heating module 20 move in the Y-axis direction.

  On the other hand, the modeling table 3 is passed through the Z-axis drive shaft 34 and the guide shaft 35 and is movable along the Z-axis drive shaft 34 extending in the vertical direction of the apparatus (vertical direction = Z-axis direction in FIG. 1). Is retained. The modeling table 3 moves in the vertical direction of the apparatus (Z-axis direction) by the driving force of the Z-axis drive motor 36. The modeling table 3 may be provided with a heating unit for heating the stacked modeled object.

  When the melt discharge of the filament is continued over time, the periphery of the discharge nozzle 18 may be stained with the molten resin. On the other hand, the cleaning brush 37 provided in the three-dimensional modeling apparatus 1 prevents the resin from adhering to the tip of the discharge nozzle 18 by periodically performing a cleaning operation on the periphery of the discharge nozzle 18. Can do. Preferably, the cleaning operation is preferably performed before the temperature of the resin is lowered from the viewpoint of preventing sticking. In this case, the cleaning brush 37 is preferably made of a heat resistant member. The abrasive powder generated during the cleaning operation may be accumulated in the dust box 38 provided in the three-dimensional modeling apparatus 1 and discarded periodically, or may be discharged to the outside by providing a suction path.

  FIG. 3 is a hardware configuration diagram of the 3D modeling apparatus according to the embodiment. The three-dimensional modeling apparatus 1 has a control unit 100. The control unit 100 is constructed by a CPU (Central Processing Unit) or a circuit and is electrically connected to each unit as shown in FIG.

  The three-dimensional modeling apparatus 1 is provided with an X-axis coordinate detection mechanism that detects the position of the discharge module 10 in the X-axis direction. The detection result of the X-axis coordinate detection mechanism is sent to the control unit 100. The control unit 100 controls the drive of the X-axis drive motor 32 based on the detection result, and moves the discharge module 10 to the target X-axis direction position.

  The three-dimensional modeling apparatus 1 is provided with a Y-axis coordinate detection mechanism that detects the position of the discharge module 10 in the Y-axis direction. The detection result of the Y-axis coordinate detection mechanism is sent to the control unit 100. The control unit 100 controls the drive of the Y-axis drive motor 33 based on the detection result, and moves the discharge module 10 to the target Y-axis direction position.

  The three-dimensional modeling apparatus 1 is provided with a Z-axis coordinate detection mechanism that detects the position of the modeling table 3 in the Z-axis direction. The detection result of the Z-axis coordinate detection mechanism is sent to the control unit 100. The control unit 100 controls the drive of the Z-axis drive motor 36 based on the detection result, and moves the modeling table 3 to the target position in the Z-axis direction.

  In this manner, the control unit 100 controls the movement of the discharge module 10 and the modeling table 3 to move the relative three-dimensional position of the discharge module 10 and the modeling table 3 to the target three-dimensional position.

  Further, the control unit 100 includes an extruder 11, a cooling block 12, a discharge nozzle 18, a laser light source 21, a cleaning brush 37, a rotation stage RS, an imaging module 101, a torsion rotation mechanism 102, a diameter measurement unit 103, and a temperature sensor 104. These drives are controlled by transmitting control signals to the drive unit. The rotation stage RS, the side surface cooling unit 39, the imaging module 101, the torsional rotation mechanism 102, the diameter measuring unit 103, and the temperature sensor 104 will be described later.

<< Heating method >>
FIG. 4 is a schematic diagram illustrating an example of an operation for heating the lower layer. Hereinafter, as an embodiment, a method of heating using a laser will be described.

  During modeling of the upper layer by the ejection module 10, the laser light source 21 irradiates the laser at the position immediately before the filament FM is ejected in the lower layer and reheats it. Reheating means that the molten filament FM is cooled and solidified and then heated again. The reheating temperature is not particularly limited, but is preferably equal to or higher than the temperature at which the lower layer filament FM melts.

  The lower layer temperature before heating is sensed by the temperature sensor 104. The position of the temperature sensor 104 is arranged at an arbitrary position where the lower surface before heating can be sensed. In the present embodiment, in FIG. 4, the temperature sensor 104 is disposed on the back side of the laser light source 21. By sensing the lower layer temperature before heating with the temperature sensor 104 and adjusting the output of the laser based on the sensing result, the lower layer can be reheated to a predetermined temperature or higher. As another method, the temperature of the lower layer during reheating may be sensed by the temperature sensor 104, and energy may be input from the laser to the lower layer until the sensing result is equal to or higher than the arbitrary temperature. In that case, the position of the temperature sensor 104 is arrange | positioned in the arbitrary positions which can sense a heating surface. As the temperature sensor 104, any known device may be used, which may be a contact type or a non-contact type.

  By reheating the surface of the lower layer, the temperature difference between the lower layer and the filament FM discharged onto the surface of the lower layer is reduced, and the lower layer and the discharged filament are mixed to improve the adhesion in the stacking direction. .

  FIG. 5 is a plan view of the heating module in the embodiment as viewed from the modeling table 3 side. In FIG. 5, the heating module 20 is attached to the rotary stage RS. The rotary stage RS rotates around the discharge nozzle 18. The laser light source 21 rotates with the rotation of the rotary stage RS. Thereby, even if the moving direction of the discharge nozzle 18 changes, the laser light source 21 can irradiate a laser beam ahead of the discharge position by the discharge nozzle 18.

  FIG. 6 is a schematic diagram illustrating a state of a modeled object when an upper layer is formed. Hereinafter, the layer under modeling by the discharge module 10 is represented as the upper layer Ln, the layer immediately below the layer being modeled is represented as the lower layer Ln-1, and the layer immediately below the lower layer Ln-1 is represented as the lower layer Ln-2. The arrows in FIG. 6 indicate the movement path (tool path) of the discharge module. In FIG. 6 and subsequent figures, the discharged filament is represented by an elliptical cylinder so that the tool path of the discharge module can be understood. For this reason, although the space | gap is formed between the filaments, it is actually preferable to shape | mold so that a space | gap may not be formed at the point of intensity | strength.

  FIG. 6A is a schematic diagram illustrating a modeled object when the upper layer is formed without reheating the lower layer. If the upper layer Ln is formed without reheating the lower layer Ln-1, the upper layer Ln can be formed in a state where the lower layer Ln-1 is solidified, so that the outer surface OS is not deformed. However, in this case, sufficient adhesive strength cannot be obtained between the upper layer Ln and the lower layer Ln-1.

  FIG. 6B is a schematic diagram illustrating a modeled object when the upper layer is formed while the lower layer is reheated. When the upper layer Ln is formed while the lower layer Ln-1 is reheated, the outer surface OS is deformed because the upper layer Ln can be formed while the lower layer Ln-1 is melted.

  FIG. 6C is a schematic diagram illustrating a modeled object when the upper layer is formed while the lower layer is reheated. In the example of FIG. 6C, the model portion M is supported by the support portion S even if the upper layer Ln is formed while the lower layer Ln-1 of the model portion M is reheated. The OS is not deformed.

  In the present embodiment, the upper Ln layer is formed in a state where the lower layer Ln-1 is partially remelted. Thereby, the entanglement of the polymer between the upper layer Ln and the lower layer Ln-1 is promoted, and the strength of the modeled object is improved. In addition, by appropriately setting the remelting conditions, both the shape accuracy and the strength in the stacking direction of the model portion can be achieved. Hereinafter, a setting example of the remelting region and its effect in this embodiment will be described.

  The model material and the support material may be the same material or may be different. For example, even when the model part M and the support part S are formed of the same material, they can be separated after modeling by controlling the strength of these interfaces.

  FIG. 7 is a schematic diagram illustrating a state of a modeled object when an upper layer is formed. In the modeling method in FIG. 7A, the three-dimensional modeling apparatus 1 reheats the surface of the model portion M in the lower layer Ln-1 and the surface excluding the outer peripheral portion of the support portion S to form a remelted portion RM. Thus, the upper layer Ln is formed. According to this method, since the region on the outer surface OS side in the model portion M is remelted and shaped, the adhesion between layers is improved and the strength in the stacking direction is improved. Further, by melting the outer surface OS side, the support part S and the model part M are less likely to be peeled off during modeling, and the modeling accuracy is improved. However, if the adhesiveness between the support part S and the model part M becomes too high, the releasability of the support part S after modeling is lowered. Furthermore, depending on the heating temperature, the strength of the model part M may be reduced by mixing the support part S in the model part M. Mixing of materials is prevented by using a non-contact heating method for the laminated surface, or by devising the movement of the contact member or cleaning the contact member when heated by contact. be able to. Further, the releasability of the support portion S can be improved by using a material different from the model material as the support material and having a lower melting point than the model material.

  In the modeling method of FIG. 7B, the three-dimensional modeling apparatus 1 forms the support part S using a model material and a support material. In this case, the three-dimensional modeling apparatus 1 arranges the support material in the area Ss on the model part M side in the support part S, and arranges the model material in the area Sm on the outer peripheral side. In this case, the three-dimensional modeling apparatus 1 may form by forming the region Sm in the model part M and the support part S with the model material, and then pouring the support material into the gap between the model materials. Subsequently, the three-dimensional modeling apparatus 1 forms the upper layer Ln while reheating the surface of the model portion M in the lower layer Ln-1 and the surface excluding the outer peripheral portion of the support portion S.

  The modeling method shown in FIG. 7B is suitable when the support part S is excellent in releasability. In addition, the modeling method of FIG. 7B is that the region Sm supports the region Ss even when the shape accuracy of the region Ss and the strength as a structure are low, so that the shape accuracy and strength of the region Ss can be compensated. preferable.

  In the modeling method of FIG. 7C, the three-dimensional modeling apparatus 1 forms the upper layer Ln while reheating the surface of the model portion M except for the vicinity of the outer surface OS. According to this method, since the heat of the model part M is not easily transmitted to the support part S during remelting, the shape of the support part S is stabilized. The modeling method of FIG. 7C is effective in that it is easy to maintain the shape of the model part M and easy to ensure the releasability between the model part M and the support part S. Compared with a modeling method in which the whole is remelted, the strength in the stacking direction is weakened. Therefore, the modeling method of FIG. 7C is effective when modeling a modeled object with a strong internal structure, or when emphasizing modeling accuracy and releasability.

  FIG. 8 is a schematic diagram illustrating a state of a modeled object when an upper layer is formed. The modeling method of FIG. 8A is that the region that is not remelted on the surface of the model portion M is expanded to a position further away from the outer surface OS, and the remelting portion RM is further reduced. This is different from the molding method. 8A is more effective in that the shape of the model portion M can be maintained because the shape of the support portion S is more stable than the modeling method of FIG. 7C. On the other hand, the strength in the stacking direction in the model portion M becomes smaller.

  The modeling method in FIG. 8B is different from the modeling method in FIG. 7C in that the surface of the lower layer Ln-1 is reheated to the vicinity of the outer surface OS in the model portion M. The modeling method shown in FIG. 8B is effective when the melting point of the support material is higher than that of the model material. According to the modeling method in FIG. 8B, the strength in the stacking direction in the model portion M is increased as compared with the modeling method in FIG.

  In the modeling method of FIG. 8C, the 3D modeling apparatus 1 discharges the support material of the upper layer Ln first to form the support portion S, and then remelts the model portion M of the lower layer Ln-1. Thus, the model portion M of the upper layer Ln is formed. Since the support part S is finally removed after modeling, it should just have the intensity | strength of the grade which does not peel during modeling, and the intensity | strength like a model material is not requested | required. For this reason, as the support material, it is preferable to select a material that can be laminated with higher accuracy than the model material. By forming the support portion S of the upper layer Ln in a state where the lower layer Ln-1 is solidified, the modeling accuracy of the support portion S is improved. According to the modeling method of FIG. 8C, the support part S and the model part M are formed independently. For this reason, the three-dimensional modeling apparatus 1 can also make the stacking pitch of the support portions S finer than the stacking pitch of the model portion M. For example, in the configuration of FIG. 8C, the stacking pitch of the support portion is ½ of the stacking pitch of the model portion M. Since the melted model material follows the shape of the support portion S, the outer surface OS of the model portion M becomes smoother by reducing the stacking pitch of the support portions S. When the support part S can be modeled more accurately than the model part M, the method of FIG. 8C is preferable.

  FIG. 9 is a schematic diagram illustrating a state of a modeled object when the upper layer is formed. The modeling method in FIG. 9A differs from FIG. 8B in that the model portion M in the upper layer Ln is formed after the support portion S in the upper layer Ln is formed first. When the melting point of the support material is higher than that of the model material, the support portion S does not melt even when heated to the vicinity of the outer surface OS in the model portion M. According to the modeling method of FIG. 9A, a molded article having excellent releasability and high strength in the stacking direction is obtained, and the modeling accuracy is improved.

  The modeling method in FIG. 9B is different from the method in FIG. 7B in that the model portion M in the upper layer Ln is formed after the support portion S in the upper layer Ln is formed first. According to the method of FIG. 9B, even when the shape accuracy of the region Ss and the strength as the structure are low, the region Sm supports the region Ss, thereby increasing the shape accuracy of the region Ss and the strength as the structure. I can compensate. However, according to the modeling method of FIG. 9B, when the region Ss is melted at the time of remelting, the releasability of the support portion S may be lowered.

  The modeling method of FIG. 9C is different from FIG. 8A in that after forming the outer peripheral side of the model part M in the upper layer Ln first, the remaining part of the model part M in the upper layer is modeled. . According to the modeling method of FIG. 9C, modeling is performed only by the model portion M, so that the shape is stable and the modeling accuracy is improved. Further, since the modeling is performed while remelting a part of the side surface of the model portion M in the upper layer Ln, the strength of the model portion M is also improved.

  FIG. 10 is a schematic diagram illustrating an example of a reheating range in the present embodiment. For the purpose of maintaining the outer shape, the three-dimensional modeling apparatus 1 does not reheat the outer peripheral portion of the three-dimensional model M, and intentionally narrows the remelted part RM, thereby maintaining the shape of the modeled product while stacking. Improve the adhesion between.

  By the way, a support part may be used besides the form mentioned above. For example, if the three-dimensional structure has a part where the lower layer is not shaped and the upper layer protrudes (hereinafter referred to as the “overhang part”), the overhang part can be lowered by gravity and the outer shape can collapse. There is sex. Therefore, the support portion supports the overhang portion, so that the outer shape can be prevented from collapsing. FIG. 11 is a diagram illustrating an example of a three-dimensional structure including an overhang portion. Hereinafter, a case where a three-dimensional structure as shown in FIG.

  FIG. 11B is an enlarged view of the cross section of the three-dimensional structure shown in FIG. The three-dimensional structure has overhang portions OH1, OH2, OH3, and OH4, and is formed on the modeling table 3. In the three-dimensional structure having such a shape, each overhang portion may be lowered by its own weight and the outer shape may be collapsed.

  In order to prevent the overhang portion from descending, it is preferable to provide a support portion below the overhang portion as shown in FIG. In FIG. 11C, the support portion S provided between the overhang portion OH and the modeling table 3 supports the overhang portion OH. The support part S may not be provided uniformly below the overhang part OH. For example, when a support portion is provided in a nearby overhang portion, the support portion is unlikely to be deformed in its outer shape, so the support portions of other overhang portions may be thinned out. In addition, a support portion may not be provided at a location where the angle formed with the vertical axis is small and the outer shape does not collapse due to its own weight, such as the overhang portion OH2. In the example of FIG. 11C, a support portion Sa is provided below the overhang portion OH1, a support portion Sb is provided below the overhang portion OH3, and a support portion Sc below the overhang portion OH4. Is provided. Whether or not the support portion is provided below each overhang portion can be determined according to the shape and modeling material of the three-dimensional structure to be modeled, such as the angle and area of the overhang portion.

  Thus, by providing the support part at the lower part of the overhang part, the collapse of the outer shape can be prevented. However, the support portion is removed after the three-dimensional structure is completed, and the procedure such as the order of removal is left to the operator. Therefore, the support part cannot be removed efficiently, and productivity may not increase. Therefore, in the present embodiment, when the support part S is formed, information regarding the removal is embedded in the support part, thereby enabling efficient removal of the support part. Further, in addition to the ease of removal based on the shape of the three-dimensional structure, it is possible to remove it taking into account the strength of the model portion M and the like.

  The support part is removed from a place where it can be easily accessed, but the releasability of the support part, which has the same ease of access, depends on the shape of the overhang part. It is easy to remove. In addition, when the overhang portion is a plane, it is generally easier to remove the angle closer to the vertical direction because the joint area between the model portion M and the support portion S that supports the model portion is small. Therefore, the information to be embedded can improve the efficiency of the removal work by selecting the information to be embedded according to whether the overhanging portion is a curved surface or a flat surface, and depending on the angle, and embedding it in the support portion. .

<< Function Block >>
Hereinafter, with reference to FIG. 12, a configuration of a modeling apparatus for efficiently removing the support part by embedding information in the support part and modeling will be described. FIG. 12 is a functional block diagram of the three-dimensional modeling apparatus 1 according to an embodiment.

  The control unit 100 of the three-dimensional modeling apparatus 1 includes a modeling data analysis unit 112 that performs data analysis on the input three-dimensional model. The modeling data analysis unit 112 analyzes the data of the three-dimensional model, and determines whether or not there is an overhang part of the three-dimensional model to be modeled and whether or not a support part is required for each overhang part. Further, the modeling data analysis unit 112 gives information related to the removal of the support part S based on the shape of the overhang part OH and the support part S. The control unit 100 controls the discharge module 10 based on the analysis result by the modeling data analysis unit 112 and models the support unit S in which information is embedded together with the model unit M. The information embedded in the support unit S can be embedded with various information such as characters, symbols, and protrusions.

  A specific example of the support unit S in which information is embedded will be shown below. FIGS. 13A to 13D are diagrams illustrating examples of various three-dimensional structures provided with a support portion S in which information is embedded.

  FIG. 13A shows an example of a three-dimensional structure in which the support portions Sa and Sc are provided in the overhang portions OH1 and OH4 of the model portion M. In the example of FIG. 13A, when the overhang portions OH2 and OH3 can be supported by the support portions Sa and Sc, the support portion may not be provided below the overhang portions OH2 and OH3.

  FIG. 13B shows an example of a three-dimensional structure in which the support portion Sb is provided in the overhang portion OH3 of the model portion M. In the example of FIG. 13B, when the other overhang portion can be supported by the support portion Sb, the support portion does not have to be provided below the other overhang portion.

  In FIG. 13A, information “A” is embedded in the support unit Sa, and information “C” is embedded in the support unit Sc. In FIG. 13B, information “B” is embedded in the support unit Sb. Here, each information is modeled on the surface of the support part S. Note that the embedded information may be expressed by the unevenness of the material, or may be expressed by changing the color of the material forming the information part.

  The information embedded in the support unit S indicates, for example, the order of removal. By viewing the information on each support unit, the operator can easily grasp the order of removal, and the support unit can be efficiently used. Can be removed. In general, since it is easy to remove in order from the support part on the outside of the three-dimensional structure, for example, from the outside to the inside, by modeling the support part in which information indicating the removal order is embedded, Removal work can be made more efficient. In addition, when there is a difference in the ease of removal depending on the shape of the overhang portion supported by the support portion, the operator can be alerted by embedding information indicating that fact in the support portion.

  Further, the information embedded in the support part does not need to be unique to each support part, and the same information may be embedded for information having a common shape of the overhang part. For example, when embedding information according to the area where the overhang portion and the support portion are joined, the information “A” is embedded in the support portion where the joint area is within a certain range, and the joint area is within another range. The information “B” may be embedded in the support unit. Thus, the support part to which the same information was given can identify as what can be removed regardless of order, and can make removal work efficient.

  Further, the support portion can be easily removed by reducing the bonding area between the overhang portion and the support portion. Specifically, by dividing one support part as a plurality of support parts, the releasability of the support part is improved, and the removal work can be made efficient. For example, as shown in FIGS. 13C and 13D, the support part Sb shown in FIG. 13B is physically divided into a plurality of parts, so that the ease of removing the support part can be improved. .

  In the example shown in FIG. 13C, the overhang portion OH3 is supported by a support portion Sb 'obtained by dividing the support portion Sb into three equal parts. Since each support portion Sb 'has the same junction area with the overhang portion OH3, "D" is embedded as information regarding removal. In FIG. 13C, the same information is embedded in each support portion Sb ′ regardless of the order of removal. However, in view of ease of removal, the outer support portion and the inner support portion Sb ′ are embedded. Different information may be embedded in the support unit.

  In the example shown in FIG. 13D, the overhang portion OH3 is supported by a support portion Sb 'obtained by dividing the support portion Sb into two at unequal intervals. In each support portion Sb ′, “E” and “F” are embedded as information indicating the order of removal according to the junction area with the overhang portion OH3.

  As described above, as shown in FIG. 13, it is possible for the operator to efficiently remove the support part by modeling the three-dimensional structure having the support part in which the information regarding the removal is embedded. In addition, by embedding information that can be identified by the support unit, even if the model unit M is damaged when the support unit is removed, it is easy to identify the damaged part, so it is easy to repair and correct the model. Not only can it be used to review the shape of the support section and how to support it. In addition, by making the support removal robot recognize the support removal information, it is possible to automate the support removal and achieve higher productivity. Note that the information embedded in the support unit is not limited to the information described above, and may be information other than information related to removal of the support unit.

<< Processing and Operation >>
Then, the process and operation | movement of the three-dimensional modeling apparatus 1 in one Embodiment are demonstrated. FIG. 14 is a flowchart illustrating a modeling process according to an embodiment.

  The control unit 100 of the three-dimensional modeling apparatus 1 accepts input of data of a three-dimensional model. The data of the stereo model is constructed by image data for each layer when the stereo model is sliced at a predetermined interval.

  The control unit 100 of the three-dimensional modeling apparatus 1 drives the X-axis drive motor 32 or the Y-axis drive motor 33 to move the discharge module 10 in the X-axis or Y-axis direction. While the discharge module 10 is moving, the control unit 100 is in a molten state or a semi-molten state from the discharge nozzle 18 to the modeling table 3 based on the image data of the lowest layer among the input three-dimensional model data. The filament FM is discharged. Thereby, the three-dimensional modeling apparatus 1 forms a layer having a shape based on the image data on the modeling table 3 (step S11).

  While the discharge module 10 is moving, the control unit 100 starts from the laser light source 21 based on the image data of the lowest layer among the layers that have not been modeled among the input three-dimensional model data. Irradiate laser. Thereby, the laser irradiation position in the lower layer is remelted (step S12). Note that the control unit 100 causes the laser to irradiate the range indicated by the image data as in the modeling method in FIGS. 7C, 8 </ b> A, 8 </ b> C, and 9 </ b> C. May be. Or the control part 100 may irradiate a laser beyond the range which image data shows like the modeling method of (A) of FIG. 7, (B), and (B) of FIG. 9, for example. The lower layer heating temperature in step S12 is controlled to be equal to or higher than the melting temperature of the filament.

  While the discharge module 10 is moving, the control unit 100 starts from the discharge nozzle 18 on the basis of the image data of the lowest layer among the layers that have not been modeled among the input three-dimensional model data. The filament FM is discharged to the lower layer on the modeling table 3. Thereby, a layer having a shape corresponding to the image data is formed on the lower layer (step S13). At this time, since the lower layer is remelted, the adhesion at the interface between the layer to be shaped and the lower layer is improved.

  Note that the process of remelting the lower layer in step S12 and the layer forming process in step S13 may overlap. In this case, the three-dimensional modeling apparatus 1 starts the discharge of the filament FM after the start of the process of irradiating the lower layer with the laser and before the irradiation of the laser to the entire irradiation range is completed.

  The control unit 100 of the three-dimensional modeling apparatus 1 determines whether the layer formed in step S13 is the outermost layer (step S14). The outermost layer is a layer formed on the basis of image data having the largest coordinate in the stacking direction (Z-axis) among the three-dimensional model data. When it is determined NO in step S14, the control unit 100 of the three-dimensional modeling apparatus 1 performs remelting processing (step S12) and layer formation processing (step S13) until the outermost layer is formed. repeat.

  When the formation of the outermost layer is completed (YES in step S14), the three-dimensional modeling apparatus 1 ends the modeling process.

<<< Modification A of Embodiment A >>>
Subsequently, a difference from the above-described embodiment will be described with respect to Modification A of the embodiment. FIG. 15 is a schematic diagram illustrating an operation of lower layer heating in one embodiment.

  In the variation A of the embodiment, the heating module 20 includes a hot air source 21 ′. Examples of the warm air source 21 'include a heater and a fan. In the modified example A of the embodiment, the warm air source 21 'heats the lower layer by blowing hot air at a high temperature and remelts it. Also in the modified example A of the embodiment, by forming the upper layer by discharging the filament FM to the remelted lower layer, the lower layer and the upper layer material are mixed, and the adhesion between the upper layer and the lower layer is improved.

<<< Modification B of Embodiment >>>
Subsequently, a different point from the above-described embodiment will be described regarding the modified example B of the embodiment. FIG. 16 is a schematic diagram showing the operation of lower layer heating in one embodiment.

  In the modified example B of the embodiment, the heating module 20 of the three-dimensional modeling apparatus 1 is replaced with a heating module 20 ′. The heating module 20 ′ includes a heating plate 28 that heats and pressurizes the lower layer in the three-dimensional structure M, a heating block 25 that heats the heating plate 28, a cooling block 22 that prevents heat conduction from the heating block 25, Is provided. The heating block 25 includes a heat source 26 such as a heater, and a thermocouple 27 for controlling the temperature of the heating plate 28. The cooling block 22 includes a cooling source 23. A guide 24 is provided between the heating block 25 and the cooling block 22.

  The heating module 20 ′ is slidably held via a connecting member with respect to an X-axis drive shaft 31 (X-axis direction) extending in the apparatus left-right direction (left-right direction in FIG. 1 = X-axis direction). . The heating module 20 ′ is heated by the heating block 25 and becomes high temperature. In order to reduce the transfer of the heat to the X-axis drive motor 32, the transfer path or guide 24 including the filament guide 14 and the like is preferably low in thermal conductivity.

  In the heating module 20 ′, the lower end of the heating plate 28 is arranged to be lower by one layer than the lower end of the discharge nozzle 18. While the discharge module 10 and the heating module 20 are scanned in the direction of the white arrow shown in FIG. 16, the filament is discharged, and at the same time, the heating plate 28 reheats the layer immediately below the layer being shaped. As a result, the temperature difference between the layer being modeled and the next lower layer is reduced, and the material is mixed between the layers, so that the interlayer strength of the modeled object is improved. Examples of the method for cooling the heated layer include a method for setting the ambient temperature, a method for leaving the layer for a predetermined time, a method using a fan, and the like.

  According to the modified example B of the embodiment, the adhesion of the interface between the layers can be improved by physically mixing the materials between the layers. In addition, according to the modified example B of the embodiment, the lower layer is selectively heated without destroying the outer shape of the modeled object, and the next discharge is performed while the lower layer is remelted. improves.

<<< Modification C of Embodiment C >>
Subsequently, a difference of the modification C of the embodiment from the modification B of the above-described embodiment will be described. FIG. 17 is a schematic diagram illustrating an operation of lower layer heating in an embodiment.

  In the modification C of the embodiment, the heating plate 28 in the heating module 20 ′ is replaced with a tap nozzle 28 ′. The tap nozzle 28 ′ is heated by the heating block 25. The tap nozzle 28 ′ heats and pressurizes the lower layer in the three-dimensional structure M by a tap operation that repeatedly taps the three-dimensional structure M vertically from the upper side by power such as a motor. As a result, the temperature difference between the layer being modeled and the next lower layer is reduced, and the materials are mixed between the layers, so that the strength between the layers of the modeled object is improved. After the tap operation, the filament FM is discharged from the discharge nozzle 18 so as to fill the surface of the lower layer recessed by the tap operation. By filling the recessed portion of the lower layer with the filament FM, the shape of the outermost surface is finished smoothly.

<<< Modification D of Embodiment D >>
Subsequently, with respect to Modification D of the embodiment, differences from the above-described embodiment will be described. FIG. 18 is a schematic diagram showing an operation of lower layer heating in one embodiment.

  In the modification D of the embodiment, the heating module 20 is provided with a side surface cooling unit 39 that cools a side surface of the three-dimensional structure M, that is, a surface parallel to the Z axis. Although it will not specifically limit as the side surface cooling part 39 if it is a cooling source which can cool the side surface of the three-dimensional structure M, A fan is illustrated.

  If the outer peripheral portion of the three-dimensional structure M is reheated without performing the process of maintaining the outer shape, the outer shape collapses and the modeling accuracy deteriorates. Therefore, in the modified example D of the embodiment, the cooling air is applied to the side surface of the three-dimensional structure M, and the outer peripheral portion of the three-dimensional structure M is reheated, thereby maintaining the shape of the modeling portion and the material. Can be stacked.

<<< Modification E of Embodiment E >>>
Next, a different point from the above-described embodiment will be described regarding Modification E of the embodiment.

  If modeling is performed while heating the lower layer or the modeling space, the viscosity of the heating part in the three-dimensional model M is lowered, so that the outer shape may collapse and modeling accuracy may be lost. On the other hand, if modeling is performed without heating the lower layer or the modeling space, the viscosity of the three-dimensional model M is increased, but it is difficult to maintain the strength in the stacking direction. Therefore, in Modification E of the embodiment, modeling is performed using a filament in which the material configuration is unevenly distributed.

  FIG. 19 is a cross-sectional view showing an example of a filament in which the material configuration is unevenly distributed. In the example of FIG. 19A, a highly viscous resin Rh is disposed on both sides of the filament F, and a low viscosity resin Rl is disposed in the center.

  The high-viscosity resin Rh disposed on both sides of the filament F is not particularly limited, and examples thereof include a resin having high viscosity by blending a filler such as alumina, carbon black, carbon fiber, glass fiber, or the like. When the filler inhibits a desired function, a resin having a controlled molecular weight may be used as the highly viscous resin Rh.

  Although it does not specifically limit as low viscosity resin Rl arrange | positioned at the center part of the filament F, Resin which is a low molecular weight grade is illustrated.

  FIG. 20 is a cross-sectional view of the discharged matter of the filament of FIG. FIG. 21 is a cross-sectional view of a modeled object modeled using the filament of FIG. By discharging the filament of FIG. 19 (A), the discharge of the shape of FIG. 20 (A) is obtained, and the shaped object of FIG. 21 is obtained. In the modeled object of FIG. 21, since the highly viscous resin is disposed on the outer peripheral portion, the modeled object is inevitably difficult to collapse.

  FIG. 19B shows another example of a filament in which the material structure is unevenly distributed. By discharging the filament shown in FIG. 19B, a discharge product having the shape shown in FIG. 20B is obtained. Thus, even if the filament of FIG. 19 (B) is used, a shaped article in which a highly viscous resin is arranged on the outer peripheral portion can be obtained. In addition, the present configuration that wraps the low-viscosity resin also has a merit that it is easier to make a filament than the configuration of FIG.

  However, when the filament of FIG. 20B is used, the lower part of the layer is also in a highly viscous state. Resins with high viscosity often have a higher melting point than resins with low viscosity. In order to prevent the molten resin from moving in the horizontal direction when the lower layer is remelted at a high temperature, it is preferable to avoid heating of the outer peripheral portion of the shaped article. For this reason, the heating means is preferably a laser that can be heated with a small spot.

  In order to improve the adhesion in the stacking direction of the outer peripheral portion, when the outer peripheral portion is heated, it is preferable to heat it by directly applying a plate or the like from the side of the modeled object. Thereby, the horizontal movement of the resin due to the decrease in viscosity is restricted. FIG. 22 is a schematic diagram illustrating an example of a three-dimensional modeling apparatus having a regulating unit.

  In the example of FIG. 22, the three-dimensional modeling apparatus 1 is provided with an assist mechanism 41 as an example of a restricting unit. In the FFF method, the thickness of one layer is about 0.10 to 0.30 mm. Therefore, the plate in the assist mechanism 41 is a thin plate such as a thickness gauge. The assist mechanism 41 is fixed to the discharge module 10 or a bracket that is indirectly fixed to the discharge module 10.

  The plate in the assist mechanism 41 is preferably heated to a temperature higher than room temperature. Although it depends on the resin used, in the case of a crystalline resin, when it comes into contact with a normal temperature plate, it is cooled rapidly, so that amorphization proceeds and a desired strength may not be obtained.

  Generally, viscosity is expressed as a function of temperature and shear rate. Engineering plastics or super engineering plastics used in the hot melt lamination method (FFF) exhibit non-linear behavior with respect to variables such as temperature or shear rate. The shear resistance necessary for the system, that is, the viscosity of the resin may be obtained. On the other hand, if the viscosity at the desired shear rate (S.Rate) is too low in the region of Tm or higher, liquid dripping from the nozzle, insufficient pull-in at the time of pulling in the filament (retracting operation), and a short shot at the beginning of discharge accompanying it, Problems such as collapse of the modeled object arise.

  In a resin having a predetermined temperature equal to or higher than Tm, generally, S.Rate = 0, that is, in a non-ejection operation, the viscosity becomes the highest at the temperature. In the case where the liquid drips even in this state, the resin composite using the filler can be an effective means for preventing the liquid dripping. By adding a filler to the resin and controlling the compounding ratio or the particle size / fiber length distribution of the compound, thixotropy at the time of melting is added, it is difficult to sag during non-discharge operation, and the viscosity is low during discharge operation It becomes.

  The method of adding a filler to the filament is suitable even in the collapse of a shaped product that tends to occur accompanying an increase in the lower layer temperature. When the modeling accuracy cannot be maintained even by the addition of the filler, it is preferable to regulate the side surface of the modeled object.

<<< Modification F of Embodiment F >>
Subsequently, a difference of the modification example F of the embodiment from the modification example E of the above-described embodiment will be described.

  In the case of using a filament in which the material configuration is unevenly distributed, it is preferable to regulate the direction of the filament introduced into the discharge module 10 so that the highly viscous resin Rh is disposed on the outer periphery of the modeled object.

  FIG. 23 is a flowchart showing an example of processing for regulating the direction of the filament. The imaging module 101 of the three-dimensional modeling apparatus 1 images the filament introduced into the ejection module 10 and transmits the obtained image data to the control unit 100.

  The control unit 100 receives the filament image data transmitted by the imaging module 101 (step S21). The controller 100 analyzes the received filament image data and calculates the rotation amount (step S22). The calculation method of the rotation amount is not particularly limited, but a method of determining the rotation amount so that the boundary between the high-viscosity resin Rh and the low-viscosity resin Rl in the filament F is a predetermined position is exemplified. For example, when discharging the filament while moving the discharge module 10 in the X-axis direction, the high-viscosity resin Rh in the filament is unevenly distributed in the positive and negative directions of the Y-axis, so that the high-viscosity is applied to the outermost shell in the modeled object. Resin is placed. For this reason, the control part 100 determines the rotation amount of a filament so that it may become the arrangement | positioning by which resin Rh was unevenly distributed in the positive / negative direction of a Y-axis.

  The control unit 100 transmits a signal for rotating the filament to the torsion rotating mechanism 102 based on the determined rotation amount. The torsion rotating mechanism 102 rotates the filament based on the signal (step S23). Thereby, the filament is regulated in a desired direction.

  If a highly viscous resin is placed outside the filament, the flow velocity on the wall side of the filament will be extremely slow in the transfer path, and the highly viscous resin will stay, allowing the filament to be discharged in the desired placement. There are things that cannot be done. For this reason, it is preferable that the inner wall of the transfer path is processed with fluorine or the like having high heat resistance in the area downstream of the heating block 25, that is, in the area to which the temperature higher than the melting point is applied. By forming the release layer in the transfer path, the frictional resistance between the molten resin and the inner wall of the transfer path is lowered, and the retention of the highly viscous resin is less likely to occur.

  Further, it is preferable that the control unit 100 performs feedforward control in order to prevent a control delay in consideration of a conveyance time lag in a section from the torsional rotation mechanism 102 to the discharge nozzle 18. For example, the control unit 100 controls the driving of the torsion rotating mechanism 102 so that the direction of the filament is switched at the timing when the traveling direction of the discharge module 10 is bent. Also, when the discharge module 10 is advanced in a curved line, the control unit 100 controls the driving of the torsion rotating mechanism 102 step by step in consideration of the time lag.

  If the filament is extremely twisted, there is a risk of entanglement in the path from the reel 4 to the introduction portion of the discharge module 10. Unwinding this entanglement is very cumbersome for the user. For this reason, it is preferable that a guide tube is introduced from the reel 4 to the introduction portion. However, when the filament is extremely twisted, the friction resistance between the guide tube and the filament is increased, and the filament may not be normally introduced. In addition, the filament may be scraped in an orifice portion with a narrow inner diameter such as a joint of a guide tube. Moreover, in the reinforced filament etc. with which the filler was mix | blended, the softness | flexibility peculiar to resin is often lost. When a torsional load is applied to such a filament, the filament may break and normal shaping may not be possible.

  For this reason, it is preferable that the control unit 100 regulates the accumulated twist amount of the filament to, for example, ± 180 ° from the reference angle.

  Further, for example, as shown in FIG. 20, a mechanism capable of rotating the entire discharge module 10 may be used instead of the mechanism for rotating the filament so that the resin is arranged in a desired state in the discharged material. In this case, the thermocouple 17 that controls the heat source 16, the wiring of the heat source 16 itself, the wiring of the cooling source 13, and a plurality of wiring systems such as an overheat protector rotate at the same time. However, it is complicated from the viewpoint of wiring.

<<< Modification G of Embodiment >>>
Next, a different point from the above-described embodiment will be described regarding modification example G of the embodiment. FIG. 24 is a schematic diagram showing modeling and surface treatment operations in one embodiment.

  In the modification G of the embodiment, the three-dimensional modeling apparatus 1 includes a heating module 20 ″. The heating module 20 ″ has a horn 30 that heats and pressurizes the three-dimensional structure M. The three-dimensional modeling apparatus 1 is provided with an ultrasonic vibration device. The horn 30 is moved from the upper side to the lower side of the laminated surface of the three-dimensional structure M by the Z-axis drive motor, and applies pressure to the laminated surface. Thereby, the ultrasonic vibration generated by the ultrasonic vibration device is transmitted to the three-dimensional structure M. When ultrasonic vibration is transmitted to the three-dimensional structure M, the upper layer Ln and the lower layer Ln-1 in the three-dimensional structure M are welded and joined. In the three-dimensional modeling apparatus 1, the number of horns 30 is not limited to one, and is appropriately selected. When a plurality of horns 30 are provided, the shape of the horns may not be unified, and horns having different shapes may be mounted.

<< Main effects of embodiment >>
The discharge module 10 (an example of a discharge unit) of the three-dimensional modeling apparatus 1 (an example of a modeling apparatus) according to the embodiment discharges a melted filament (an example of a modeling material) to form a modeling material layer. The heating module 20 (an example of a heating unit) of the three-dimensional modeling apparatus 1 heats the formed modeling material layer. The discharge module 10 forms the modeling material layer by stacking the modeling material layer by discharging the melted filament to the heated modeling material layer. According to the above embodiment, the layers are mixed together by remelting and discharging the filament to the modeling material layer (lower layer) to laminate the modeling material layer (upper layer), so the strength in the stacking direction of the modeled object is improved. Can be made. Moreover, it can shape | mold without affecting the visibility of an external shape by the process which laminates | stacks an upper layer.

  The heating module 20 of the three-dimensional modeling apparatus 1 selectively heats a predetermined region of the modeling material layer. Thereby, it becomes possible to model while maintaining the shape of the modeled object.

  Moreover, it becomes possible to remove a support part efficiently after the modeling of a three-dimensional modeling thing is completed by embedding information in a support part.

  The rotation stage RS (an example of a conveyance unit) of the three-dimensional modeling apparatus 1 conveys the heating module 20 so that heating can be performed from different directions with respect to a predetermined position. Thereby, the heating module 20 can follow the movement of the discharge module 10 and heat the modeling material layer.

  The three-dimensional modeling apparatus 1 includes a temperature sensor 104 (an example of a measuring unit) that measures the temperature of the modeling material layer heated by the heating module 20. The heating module 20 heats the modeling material layer based on the temperature measured by the temperature sensor 104. Thereby, the three-dimensional modeling apparatus 1 can appropriately reheat the modeling material layer according to desired characteristics such as adhesion strength between layers or modeling accuracy.

  The heating module 20 may be a laser light source 21 (an example of a source irradiation device) that emits laser light. Thereby, the heating module 20 can selectively heat a modeling thing, without contacting a modeling thing.

  The heating module 20 may be a hot air source (an example of a blowing unit) that blows heated air. Thereby, the heating module 20 can selectively heat a modeling thing, without contacting a modeling thing.

  The heating module 20 ′ may be a heating plate 28 or a tap nozzle 28 ′ (an example of a member) that contacts and heats the modeling material layer. Thereby, heating module 20 'can selectively heat a molded article.

  The three-dimensional modeling apparatus 1 may include a plurality of heating modules 20. Thereby, even if the scanning direction of the discharge module 10 changes, the modeling object can be heated by any one of the heating modules 20, so that the modeling time is shortened.

  The side surface cooling unit 39 (an example of a cooling unit) of the three-dimensional modeling apparatus 1 cools the outer peripheral portion of the modeled object formed by the modeling material. Thereby, the three-dimensional modeling apparatus 1 can model while maintaining the shape of the modeled object.

  A plurality of materials having different viscosities are arranged on the filament. Accordingly, the discharge module 10 can discharge the filament based on the control by the control unit 100 so that a material having a lower viscosity is disposed on the outer peripheral portion.

  The assist mechanism 41 (an example of a support member) of the three-dimensional modeling apparatus 1 supports the formed modeling material layer. Thereby, it becomes possible to model while maintaining the shape of the formed modeling material layer.

DESCRIPTION OF SYMBOLS 1 3D modeling apparatus 3 Modeling table 10 Discharge module 18 Discharge nozzle 20, 20 ', 20 "Heating module 21 Laser light source 28 Heating plate 28' Tap nozzle 37 Cleaning brush 38 Dust box 39 Side surface cooling part 41 Assist mechanism 100 Control part 112 Modeling data analysis unit RS rotation stage

Japanese Patent No. 399933

Claims (7)

Having a modeling means for modeling a three-dimensional structure including the model part and the support part;
The modeling device is characterized by embedding information related to the removal of the support part when modeling the support part. The modeling means is
The modeling apparatus according to claim 1, wherein the support unit is modeled at a lower portion of an overhang portion of the model unit. The modeling means is
The modeling apparatus according to claim 1, wherein information corresponding to the releasability between the model unit and the support unit is embedded in the support unit for modeling. The modeling means is
The modeling apparatus of any one of Claims 1-3 which embeds the information determined according to the shape of the said model part in the said support part, and models it. The modeling means is
The modeling apparatus of any one of Claims 1-4 in which the information determined according to the area which the said model part and the said support part join is Claimed. The modeling means is
The modeling apparatus of any one of Claims 1-5 which embeds the information which identifies the order which removes the said support part in the said support part, and models it. Analyzing the solid model data;
Forming a three-dimensional structure including a model portion of the three-dimensional model and a support portion, and forming the step,
In modeling the support part, based on the analysis result in the analyzing step, information related to the removal of the support part is embedded and modeled.