JP2013067118A - Three-dimensional shaping apparatus, three-dimensional shaping method, device and program for generating setting data for three-dimensional shaping apparatus, and computer-readable recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a pattern from being formed on a surface of a shaped article by preventing a roller part from being applied to the surface of the shaped article and to a part influencing the surface.SOLUTION: In a slice containing a model material MA or a support material located on the outermost surface of a shaped article with respect to three-dimensional data of the shaped article, or a slice located on an upper or lower side by one or more layers relative to a slice including a model material MA or a support material which is located on a heterogeneous shaping material interface at which the type of the shaping material is changed over, this three-dimensional shaping apparatus includes a hollow part generation means to generate a hollow part ES obtained by preventing the model material MA or the support material included in the slice from being discharged or reducing the discharge amount thereof, wherein a shaping material discharge means shapes the slice at a position corresponding to the hollow part ES by preventing the discharge of the shaping material or reducing the discharge amount thereof when the slice of a shaping object includes the hollow part ES generated by the hollow part generation means.

Description

  The present invention relates to a three-dimensional modeling apparatus, a three-dimensional modeling method, a setting data creation apparatus for a three-dimensional modeling apparatus, a setting data creation program for a three-dimensional modeling apparatus, and a computer readable machine for producing a three-dimensional modeling object by an inkjet method. The present invention relates to a recording medium.

  Conventionally, three-dimensional data, which is basic data of a modeled object, is set to an arbitrary posture on a computer screen, and each cross section cut by a plurality of surfaces parallel to the height direction based on the set posture. 2. Description of the Related Art There is known an apparatus that generates data and performs three-dimensional modeling by sequentially laminating resins on the basis of two-dimensional data related to each layer to generate a three-dimensional model of a three-dimensional model.

  In the field of rapid prototyping (RP), which is used for prototyping in product development, an additive manufacturing method capable of three-dimensional molding is used. As the additive manufacturing method, additive manufacturing method slices the three-dimensional CAD data of the product and creates the original data of manufacturing by superimposing the thin plates, and the material such as powder, resin, steel plate, paper, etc. A prototype is created by stacking layers. As such a layered modeling method, an inkjet method, a powder method, an optical modeling method, a sheet lamination method, an extrusion method, and the like are known. Of these, the ink jet method is formed by jetting a liquefied material and then curing the layer by irradiating with ultraviolet light (UV) or cooling. According to this method, since the principle of the ink jet printer can be applied, there is an advantage that high definition can be easily achieved.

  The three-dimensional modeling equipment using the resin lamination method supports the model material that will be the final modeled object, the basic part that supports the model, and the projecting part of the model material, and scans the support material that is finally removed in the xY direction. While being discharged onto the modeling plate, the modeling is performed by stacking in the height direction. The model material and the support material are made of a resin that has a property of being cured by irradiating ultraviolet light, and the ultraviolet lamp that irradiates the ultraviolet light is scanned in the XY direction together with the nozzle that discharges the model material and the support material, The model material and support material discharged from the nozzle are irradiated with ultraviolet light and cured.

Special table 2003-535712 gazette

  In such an ink jet type three-dimensional molding machine, the modeling accuracy in the height direction is maintained by keeping the thickness of each layer corresponding to each slice uniform. However, in order to keep the thickness of each layer uniform, it is difficult to always control the amount of resin ejected simultaneously by a plurality of nozzles, so a margin larger than the amount of resin required for modeling each layer is increased. It is provided to discharge excessive modeling materials such as model materials and support materials. Then, after the resin is discharged, the molding is performed while the surplus portion of the resin discharged from the nozzle is recovered by the recovery mechanism. The roller unit 25 is used for such a recovery mechanism. FIG. 28 shows a perspective view of a state in which the roller portion 25 removes the excess of the modeling material. In this example, a state in which the surface of the resin discharged onto the modeling plate 40 is flowable by the roller body 26 in a state where the resin can flow is shown. The roller unit 25 includes a roller main body 26 that is a rotating body, a blade 27 that is disposed so as to protrude from the surface of the roller main body 26, a bus 28 that stores a modeling material scraped off by the blade 27, and a bus 28. And a suction pipe 29 for discharging the modeling material accumulated in the container. The roller body 26 is rotated counterclockwise (clockwise in FIG. 28) with respect to the traveling direction of the head unit 20, and scrapes the modeling material in a flowable state. The modeling material thus scraped up adheres to the roller body 26 and is carried to the blade 27, and then scraped off by the blade 27 and guided to the bus 28. For this reason, the blade 27 is fixed in a downward gradient posture toward the bus 28. The suction pipe 29 is connected to a waste liquid path, and sucks the modeling material collected in the bus 28 using a pump or the like and stores it in a waste liquid tank (not shown).

  Using such a roller portion 25, the roller body 26 is pressed against all the laminated surfaces of the modeled object, and the excess resin is scraped off to realize the accuracy of the modeled object. On the surface of the roller body 26, in order to make it easy to scrape off excess resin, protrusions of about 5 to 10 μm are provided in a spiral shape as shown in FIG. In this case, since the roller main body 26 is applied to the portion that becomes the surface of the modeled object, there is a problem that a wave pattern is formed due to the roller main body 26 hitting the surface of the modeled object. This is shown in FIGS. 30 (a) and 30 (b). In these drawings, FIG. 30 (a) is a cross-sectional view showing a state in which a stripe pattern is generated on the surface of the modeling material by the roller body, and FIG. 30 (b) is a plan view of FIG. 30 (a). As shown in these figures, when the surface of the resin was smooth before the roller body 26 was applied, the portion hit by the roller body 26 was wavy and a striped pattern was formed on the surface, or the surface of the roller body 26 was formed. Streaks are formed on the surface of the resin due to the formed protrusions and foreign matters attached to the surface.

  In addition, this problem occurs not only on the outermost surface formed with the resin, but also on an intermediate surface. That is, in a stacked type three-dimensional modeling apparatus, a modeled object is often created on a stacked body in which support materials are stacked. In this case, if the surface of the support material is undulating by hitting the roller body 26, as shown in the cross-sectional view of FIG. 31, the undulating pattern of the support material laminated structure is formed on the modeled object formed thereon. It will be transcribed.

  The present invention has been made in view of such conventional problems. The main objects of the present invention are a three-dimensional modeling apparatus, a three-dimensional modeling method, a setting data creation apparatus for a three-dimensional modeling apparatus, and a three-dimensional modeling that improve the quality by reducing streaks and wave patterns that appear on the surface of the modeled object. An object of the present invention is to provide a setting data creation program for a device and a computer-readable recording medium.

Means for Solving the Problems and Effects of the Invention

  In order to achieve the above object, according to the three-dimensional modeling apparatus according to the first aspect of the present invention, the model material MA that becomes a final modeled object as the modeling material on the modeling plate 40, and the model By repeating the operation of supporting the overhanging portion where the material MA overhangs, and finally discharging the support material SA to be removed while scanning in at least one direction and curing it, a predetermined thickness in the height direction is obtained. Is a three-dimensional modeling apparatus that performs modeling by generating slices in layers and stacking the slices in the height direction, the modeling plate 40 for mounting a modeled object, and the model material A modeling material discharge means in which a plurality of model material discharge nozzles 21 for discharging MA and support material discharge nozzles 22 for discharging the support material SA are arranged in one direction, respectively, A roller portion 25 that is freely supported and presses the model material MA or the support material SA in a flowable state while rotating it from the upper surface to scrape off the excess of the model material MA or the support material SA; , A head unit 20 including the modeling material discharge unit and the roller unit 25, a horizontal driving unit for reciprocating the head unit 20 in the horizontal direction, and a relative relationship in the height direction between the head unit 20 and the modeling plate 40. The vertical driving means for moving the position and the horizontal driving means are driven, and the modeling material for one slice is discharged and cured by the modeling material discharging means, and then the vertical driving means is driven and discharged. Control means 10 for moving the position onto the cured slice, further discharging and curing the modeling material for the slice of the next layer, and controlling to sequentially stack the slices, and the tertiary of the modeled object From the slice including the model material MA or the support material SA positioned on the outermost surface of the modeled object or the slice including the model material MA or the support material SA positioned at the different type modeling material interface where the type of the modeling material is switched. And a hollow portion generating means for generating a hollow portion ES in which the model material MA or the support material SA included in the slice is not discharged or the discharge amount is reduced, in a slice located one or more layers below, When the material discharge unit includes the hollow part ES generated by the hollow part generation unit in the slice to be formed, the material discharge unit does not discharge the modeling material to the position corresponding to the hollow part ES or reduces the discharge amount. Slice shaping can be performed. Thereby, at the time of modeling of the slice located at the outermost surface or the heterogeneous modeling material interface, it can be controlled so that the modeling material discharged to the position corresponding to the hollow portion is not scraped off by the roller unit. That is, the model material or the support material at the outermost surface or the interface of the different shaped modeling material is shaped below the original position by the hollow portion, and as a result, the roller portion does not come into contact with the roller portion when the excess resin is collected. It is possible to avoid wrinkles and to improve the surface finish of the molding material.

  Further, according to the three-dimensional modeling apparatus according to the second aspect, the apparatus includes a discharge data storage unit for storing discharge data in which a discharge pattern for each slice constituting the model is recorded, and the control unit 10 includes: According to the discharge data stored in the discharge data storage means, when the hollow portion ES generated by the hollow portion generation means is included in a slice to be formed, the modeling material discharge means is located at a position corresponding to the hollow portion ES. The modeling material is not discharged or controlled so as to reduce the discharge amount, and the slice is modeled. At the time of modeling the slice located at the outermost surface or the different type modeling material interface, it is discharged to a position corresponding to the hollow part ES. The modeling material discharge means can be controlled so that the modeling material is not scraped off by the roller portion 25. Thereby, according to the discharge data including the hollow part previously generated by the hollow part generating unit, the discharge can be controlled by the control unit. That is, it is only necessary to change the ejection data, and it is possible to eliminate the need for hardware changes, and an advantage that can be applied to an existing three-dimensional modeling apparatus is obtained.

  Furthermore, according to the three-dimensional modeling apparatus according to the third aspect, when modeling each slice by the modeling material discharge unit, the hollow part generating unit determines whether or not the hollow part ES needs to be formed in the slice. When the hollow part ES is included, the controller does not discharge the modeling material from the modeling material discharging unit at a position corresponding to the hollow part ES generated by the hollow unit generating unit or the discharge amount It is possible to control so as to decrease. As a result, it is not necessary to process the discharge data so as to provide a hollow portion in advance, and by using the existing discharge data, the hollow portion is automatically provided at a site that matches the conditions at the time of modeling, so surplus The contact of the roller portion can be avoided when the resin is collected.

  Furthermore, according to the three-dimensional modeling apparatus according to the fourth aspect, on the modeling plate 40, as a modeling material, a model material MA that becomes a final modeled object and a projecting portion where the model material MA projects, The support material SA that is finally removed is ejected while being scanned in at least one direction, and the operation of curing this is repeated, thereby generating slices having a predetermined thickness in the height direction in layers, A three-dimensional modeling apparatus that performs modeling by stacking slices in the height direction, the modeling plate 40 for placing a modeled object, and a model material discharge nozzle for discharging the model material MA 21 and a modeling material discharge means in which a plurality of support material discharge nozzles 22 for discharging the support material SA are arranged in one direction, respectively, and are rotatably supported. In a state where the material MA or the support material SA can flow, the roller MA 25 is pressed while rotating from above to scrape off the excess of the model material MA or the support material SA, the modeling material discharge means, A head unit 20 including a roller unit 25, a horizontal driving unit for reciprocating the head unit 20 in the horizontal direction, and a vertical unit for moving the relative position of the head unit 20 and the modeling plate 40 in the height direction. The driving means and the horizontal driving means are driven to discharge and harden the modeling material for one slice by the modeling material discharging means, and then the vertical driving means is driven to set the discharge position to the slice after the hardening. The model material M positioned on the outermost surface of the modeled object and the control means 10 for controlling the stacking of the slices sequentially by discharging and curing the modeling material for the next layer slice. Alternatively, a slice including the support material SA, or a slice positioned further lower than the slice including the model material MA or the support material SA positioned at the interface of the different modeling material where the type of the modeling material is switched is included in the slice. Discharge control means 13 for controlling the modeling material discharge means so as not to discharge the model material MA or the support material SA or reduce the discharge amount. As a result, the model material or the support material at the uppermost surface or the heterogeneous modeling material interface is modeled below the original position by providing a hollow portion that suppresses the ejection amount of the modeling material, and as a result, the roller is collected when the excess resin is recovered. Since it does not contact the part, it is possible to avoid the generation of streaks and wrinkles by this roller part, and the advantage that the surface finish of the modeling material can be cleaned is obtained.

  Furthermore, according to the three-dimensional modeling apparatus according to the fifth aspect, the discharge control means 13 is configured so that the model material MA or the support material SA located on the outermost surface of the modeled object, or a different type of modeling material in which the type of the modeling material is switched. It is possible to control the modeling material discharge unit so that the model material MA or the support material SA is not discharged only in a portion directly below the model material MA or the support material SA located at the interface. Thereby, the surface state can be improved by restricting the discharge of the modeling material and preventing the resin from being collected only at the site where the roller portion is not desired to contact.

  Furthermore, according to the three-dimensional modeling apparatus according to the sixth aspect, the discharge control means 13 moves the hollow portion ES including the model material MA or the support material SA that does not discharge from the hollow portion ES to the outermost surface or the heterogeneous modeling material interface. Even if the model material MA or the support material SA is ejected and stacked by the modeling material ejection means, the model material MA or the support material SA included in the slice on the outermost surface or the different shaped material interface. However, it can be located below from the outermost surface or the interface of the different shaped material so as not to contact the roller part 25. In this way, considering the fact that the height difference is gradually reduced each time the slices are overlapped, because the surface of the modeling material is lowered by providing a hollow portion to provide a height difference, and the resin portion is not collected by the roller portion. In addition, it can be set so as to avoid contact with the roller portion at the uppermost surface or at the interface of the different shaped material.

  Furthermore, according to the three-dimensional modeling apparatus according to the seventh aspect, the discharge control means 13 can position the hollow portion downward by 1 to 10 slices from the outermost surface or the heterogeneous modeling material interface.

  Furthermore, according to the three-dimensional modeling apparatus according to the eighth aspect, the discharge control means 13 determines the position of the hollow portion ES including either the model material MA or the support material SA that is not discharged as the outermost surface or the heterogeneous modeling. When the surface is n slices below the material interface, the upper surface for one slice of the hollow portion ES is either the model material MA or the support material SA, and the upper surface for the n slice of the hollow portion ES is the model material MA. Alternatively, it can be set to n satisfying all the conditions that one of the support materials SA and the upper surface of the hollow portion ES corresponding to n + 1 slices is blank, the model material MA, or the support material SA.

  Furthermore, according to the three-dimensional modeling apparatus according to the ninth aspect, the thickness of one layer of the hollow portion ES can be made thicker than the thickness of the surplus resin recovered by the roller portion 25. Thus, by removing one hollow portion, a height difference can be provided so that the roller portion does not contact the surface of the modeling material, and it is possible to avoid collecting the cured modeling material by the roller portion.

  Furthermore, according to the three-dimensional modeling apparatus according to the tenth aspect, the three-dimensional modeling apparatus further includes a curing unit 24 for curing the model material MA and the support material SA, and the control unit 10 is the horizontal drive unit and the head. The part 20 is reciprocated in one direction, and either the model material MA or the support material SA is ejected onto the modeling plate 40 by the modeling material ejecting means in at least one of the forward path and the return path of the reciprocating scanning. The surplus part of the model material MA or the support material SA in a flowable state by the roller portion 25 is collected in at least one of the return path and the return path of the reciprocating scan, and the forward path and the return path of the reciprocating scan are recovered. At least one of the model material MA and the support material SA is cured by the curing means 24 to further reciprocate the scan. At least one of the return path and the forward path, the modeling material discharge unit discharges the other of the model material MA or the support material SA onto the modeling plate 40, and at least one of the forward path and the return path of the reciprocating scan, The other surplus of the model material MA or the support material SA in a flowable state by the roller portion 25 is collected, and the model material MA is used by the curing means 24 in at least one of the return path and the forward path of the reciprocating scanning. Alternatively, the other slice of the support material SA is cured to generate the slice, and the vertical driving means moves the relative position of the modeling plate 40 and the head unit 20 in the height direction, and the stacking of the slices is repeated. Can be controlled to execute modeling.

  Furthermore, according to the three-dimensional modeling apparatus according to the eleventh aspect, the model material MA and the support material are scanned in the same reciprocating scan in the line where the model material MA and the support material SA are positioned in the scanning direction of the modeled object. Only one of the modeling materials can be discharged and cured without simultaneously discharging SA.

  Furthermore, according to the three-dimensional modeling apparatus according to the twelfth aspect, the model material MA and the support material are scanned in the same reciprocating scan in the line where the model material MA and the support material SA are positioned in the scanning direction of the modeled object. SA can be discharged or cured.

  Furthermore, according to the three-dimensional modeling apparatus according to the thirteenth aspect, the modeling material ejection unit can be controlled so that the ejection control unit 13 does not eject the model material MA as the hollow portion ES.

  Furthermore, according to the three-dimensional modeling apparatus according to the fourteenth aspect, the modeling material ejection unit can be controlled so that the ejection control unit 13 does not eject the support material SA as the hollow portion ES.

  Furthermore, according to the three-dimensional modeling method according to the fifteenth aspect, a model material MA that becomes a final modeled object as a modeled material on the modeling plate 40 for placing a modeled object, and the model material MA The support material SA that supports the overhanging portion where the overhangs and is finally removed is discharged while scanning the modeling material discharge means in at least one direction with the horizontal drive means, and is cured and discharged with the vertical drive means. Three-dimensional modeling by repeating the operation of relatively moving the position in the height direction to generate slices having a predetermined thickness in the height direction and stacking the slices in the height direction A modeling method, wherein either one of the modeling material MA or the support material SA is ejected onto the modeling plate 40 by a modeling material discharging means for discharging the modeling material. A step of recovering the discharged one modeling material while rotating at a predetermined speed with a roller portion 25 rotatably supported in order to recover an excess of the modeling material in a flowable state; and A step of curing the flowable modeling material from which the surplus is recovered, a step of moving a relative position in the height direction of the modeling material discharge unit and the modeling plate 40 by the vertical driving unit, and the modeling material discharge unit The model located on the outermost surface of the modeled object while repeating the discharge of the modeled material by the roller, the recovery of the surplus of the modeled material by the roller unit 25, the curing of the modeled material, and the movement in the height direction by the vertical driving means The slice including the material MA or the support material SA, or the slice including the model material MA or the support material SA located at the interface of the different type of modeling material where the type of the modeling material is switched is positioned even more downward. In rice molding, the process of controlling the modeling material discharge means to reduce or discharge amount does not eject the model material MA or support member SA included in the slice can include. As a result, the model material or the support material at the uppermost surface or the heterogeneous modeling material interface is modeled below the original position by providing the hollow portion, and as a result, the roller portion does not contact the roller portion when collecting excess resin. It is possible to avoid the generation of streaks and wrinkles by the portion, and the advantage that the surface finish of the modeling material can be cleaned is obtained.

  Furthermore, according to the setting data creation device for the three-dimensional modeling apparatus according to the sixteenth aspect, the model material MA that will be the final modeled object as the modeled material on the modeling plate 40 for placing the modeled object And the support material SA, which is finally removed, supporting the projecting portion from which the model material MA projects, is ejected while scanning the modeling material ejecting means in at least one direction by the horizontal driving means, and is cured. By repeating the operation of relatively moving the ejection position in the height direction by the vertical drive means, the slices are stacked in the height direction while generating slices having a predetermined thickness in the height direction. Is a setting data creation device for a three-dimensional modeling apparatus that performs modeling by the input means 61 for acquiring the three-dimensional data of the modeled object, and the model material MA located on the outermost surface of the modeled object or The slices that include the port material SA, or slices that are located further lower than the slices that include the model material MA or the support material SA that are located at the interface between different types of modeling materials where the type of modeling material is switched, are included in the slices. A hollow portion generating means for generating a hollow portion ES in which the model material MA or the support material SA is not discharged or the discharge amount is reduced. As a result, the model material or the support material at the uppermost surface or the heterogeneous modeling material interface is modeled below the original position by providing the hollow portion, and as a result, the roller portion does not contact the roller portion when collecting excess resin. It is possible to avoid the generation of streaks and wrinkles by the portion, and the advantage that the surface finish of the modeling material can be cleaned is obtained.

  Furthermore, according to the setting data creation program for the three-dimensional modeling apparatus according to the seventeenth aspect, the model material MA that becomes the final modeled object as the modeled material on the model plate 40 for placing the modeled object And the support material SA, which is finally removed, supporting the projecting portion from which the model material MA projects, is ejected while scanning the modeling material ejecting means in at least one direction by the horizontal driving means, and is cured. By repeating the operation of relatively moving the ejection position in the height direction by the vertical drive means, the slices are stacked in the height direction while generating slices having a predetermined thickness in the height direction. Is a setting data creation program for a three-dimensional modeling apparatus that performs modeling by using the input function for acquiring the three-dimensional data of the modeled object and the model material located on the outermost surface of the modeled object A slice containing A or support material SA, or a slice located one layer or more below the slice containing model material MA or support material SA located at the interface between different types of modeling material where the type of modeling material is switched, is included in the slice It is possible to cause the computer to realize a hollow portion generation function for generating the hollow portion ES so as not to discharge the model material MA or the support material SA or reduce the discharge amount. As a result, the model material or the support material at the uppermost surface or the heterogeneous modeling material interface is modeled below the original position by providing the hollow portion, and as a result, the roller portion does not contact the roller portion when collecting excess resin. It is possible to avoid the generation of streaks and wrinkles by the portion, and the advantage that the surface finish of the modeling material can be cleaned is obtained.

  Furthermore, a computer-readable recording medium according to the eighteenth aspect stores the above program. Recording media include CD-ROM, CD-R, CD-RW, flexible disk, magnetic tape, MO, DVD-ROM, DVD-RAM, DVD-R, DVD + R, DVD-RW, DVD + RW, Blu-ray, HD A medium that can store a program such as a magnetic disk such as a DVD (AOD), an optical disk, a magneto-optical disk, a semiconductor memory, or the like is included. The program includes a program distributed in a download manner through a network line such as the Internet, in addition to a program stored and distributed in the recording medium. Furthermore, the recording medium includes a device capable of recording the program, for example, a general purpose or dedicated device in which the program is mounted in a state where the program can be executed in the form of software, firmware, or the like. Furthermore, each process and function included in the program may be executed by computer-executable program software, or each part of the process or hardware may be executed by hardware such as a predetermined gate array (FPGA, ASIC), or program software. And a partial hardware module that realizes a part of hardware elements may be mixed.

1 is a block diagram illustrating a three-dimensional modeling apparatus according to Embodiment 1. FIG. It is a block diagram which shows the three-dimensional modeling apparatus which concerns on a modification. It is a top view which shows a mode that a head part is moved to XY direction. It is a perspective view which shows the external appearance of a head part. It is a perspective view which shows the state which removes the surplus part of modeling material with a roller part. It is a model top view which shows the discharge nozzle of a roller part, and the width | variety of a roller main body. It is a schematic cross section which shows the state which divided and shaped the same layer of the molded article into the some area | region. FIG. 8A is a theoretical form immediately after the surplus resin is recovered by the roller portion, and FIG. 8B is a schematic cross-sectional view showing the state in which the resin in FIG. 8A is deformed by its own weight. It is a schematic cross section which shows the state which laminates | stacks several layers. It is a schematic diagram which shows a mode that the mixing of the interface of a model material and a support material is reduced. It is a flowchart which shows the procedure of FIG. It is a perspective view which shows the modeling material modeled by the evaluation test. It is a perspective view which shows the molded article containing the site | part to which a surface state improvement function is applied. It is a schematic cross section showing a staircase shaped object. It is a schematic cross section which shows the virtual example which provided the hollow part with respect to the molded article of FIG. It is a schematic cross section which shows the state which modeled the modeling thing of FIG. 15 to the 3rd layer. It is a schematic diagram which shows the state which discharges the 4th layer from the state of FIG. FIG. 18 is a schematic cross-sectional view showing a state in which an excessive amount of resin is not collected after ejection in FIG. 17. It is a schematic cross section which shows the state which applies a roller part in the state of FIG. It is a schematic cross section which shows the virtual example of the molded article which provided the hollow part in the support material. It is a schematic cross section which shows a mode that the molded article of FIG. 20 was actually modeled. It is a schematic cross section which shows a mode that the landing position of a modeling material shifts | deviates by a hollow part. FIG. 23A is a schematic cross-sectional view showing a modeling material in which a depression is generated, FIG. 23B is a schematic cross-sectional view showing a virtual example of a modeled object in which a hollow portion is provided on the upper surface of FIG. FIG. 24C is a schematic cross-sectional view showing a state in which the shaped article in FIG. Fig.24 (a) is sectional drawing which shows the state which formed the hollow part which restricted the discharge amount with respect to the molded article similar to FIG. 15, FIG.24 (b) sliced the molded article of FIG. FIG. 24C is a cross-sectional view showing a state where the slice S4 is further laminated on FIG. 24B, and FIG. 24D is a cross-sectional view showing the state where the slices S5 to S3 are further laminated. FIG. 24E is a cross-sectional view showing a state in which slices S7 are further stacked on FIG. 24D. FIG. 25A is a schematic cross-sectional view showing a stepped shaped article shown in FIG. 14, and FIG. 25B is a schematic cross-sectional view showing a shaped article processed to provide a hollow portion in FIG. It is a flowchart which shows an example of the procedure which produces | generates discharge data from shaped article data. 27A shows slices S3, S4, and S5 of the modeling material shown in FIG. 25A, FIG. 27B shows slice S3 in FIG. 27A, FIG. 27C shows slice S4, and FIG. d) is NOT of slice S5, FIG. 27 (e) is AND of FIGS. 27 (b), 27 (c) and 27 (d), FIG. 27 (f) is NOT of FIG. 27 (e), FIG. (G) is a schematic cross-sectional view showing a slice S3, and FIG. 27 (h) is a schematic cross-sectional view showing a slice S3 ′ serving as ejection data. It is a perspective view which shows the structure of a roller part. It is a schematic diagram which shows the state which provided the processus | protrusion on the surface of the roller main body in a spiral. FIG. 30A is a cross-sectional view showing a state in which a stripe pattern is generated on the surface of the modeling material by the roller body, and FIG. 30B is a plan view of FIG. It is a schematic cross section which shows a mode that the corrugated pattern of the surface of a support material is transcribe | transferred to the model material modeled on the upper surface. It is a block diagram which shows the setting data creation apparatus for 3D modeling apparatuses.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below is a three-dimensional modeling apparatus, a three-dimensional modeling method, a setting data creation apparatus for a three-dimensional modeling apparatus, and setting data for a three-dimensional modeling apparatus for embodying the technical idea of the present invention. The present invention exemplifies a creation program and a computer-readable recording medium, and the present invention relates to a three-dimensional modeling apparatus, a three-dimensional modeling method, a setting data creation apparatus for a three-dimensional modeling apparatus, and setting data for a three-dimensional modeling apparatus The creation program and the computer-readable recording medium are not specified as follows. Further, the present specification by no means specifies the members shown in the claims to the members of the embodiments. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the embodiments are not intended to limit the scope of the present invention unless otherwise specified, and are merely explanations. It's just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.
Example 1

  In FIG. 1, the block diagram of the three-dimensional modeling system 100 which concerns on Example 1 of this invention is shown. Here, an example applied to an inkjet three-dimensional modeling apparatus will be described as an example of the three-dimensional modeling apparatus. This three-dimensional modeling system 100 manufactures an arbitrary modeled object by ejecting and curing a modeling material in a fluidized state by an ink jet method, and laminating them. As the modeling material, a model material MA constituting a final modeled object and a support material SA that is modeled and finally removed to support the projecting portion from which the model material MA projects are used.

  A three-dimensional modeling system 100 shown in FIG. 1 includes a setting data creation device 1 (computer PC in FIG. 1) that sends modeling data and setting data that are modeling conditions to the three-dimensional modeling device 2, and the three-dimensional modeling device 2. Composed. The three-dimensional modeling apparatus 2 includes a control unit 10, a head unit 20, and a modeling plate 40. The head unit 20 includes a model material discharge nozzle 21 that discharges the model material MA and a support material discharge nozzle 22 that discharges the support material SA as modeling material discharge means. In addition, by scraping off the surplus from the discharged modeling material, the thickness of the uppermost layer of the modeling object at that time is optimized, and the roller unit 25 for smoothing the surface of the modeling material, The head unit 20 also includes a curing unit 24 that cures the modeling material. Further, the head portion 20 is scanned back and forth in the horizontal direction in order to discharge the modeling material from the model material discharge nozzle 21 and the support material discharge nozzle 22 to an appropriate position on the modeling plate 40 in a liquid or fluid state by an ink jet method. XY direction drive as horizontal drive means for scanning in the X direction and Y direction orthogonal to the X direction, and vertical drive means for moving the relative position in the height direction between the head portion 20 and the modeling plate 40 A unit 31 and a Z-direction drive unit 32 are provided. Here, the Y direction is an arrangement direction in which a plurality of orifices of the model material discharge nozzle 21 and the support material discharge nozzle are arranged, and the X direction is a direction orthogonal to the Y direction in a horizontal plane.

When the computer PC receives the input of the basic data of a three-dimensional shaped object, for example, model data designed by three-dimensional CAD, etc., it first converts this CAD data into, for example, STL (Stereo Lithography Data) data. Further, setting data for generating cross-sectional data obtained by slicing the STL data into a plurality of thin cross-sectional bodies and transmitting the slice data to the 3D modeling apparatus 2 in a batch or in units of each slice layer It functions as the creation device 1. At this time, corresponding to the determination of the posture on the modeling plate 40 of model data (actually, STL data after conversion) designed by three-dimensional CAD or the like, the model formed by the model material MA in this posture is supported. The position where the support material SA is provided is set for the necessary space or location, and slice data corresponding to each layer is formed based on these data. The control means 10 takes in the cross-sectional data from the computer PC and controls the head unit 20, the XY direction driving unit 31, and the Z direction driving unit 32 according to the data. Under the control of the control means 10, the XY direction drive unit 31 is operated, and the model material MA and the support material SA as modeling materials are formed as droplets from the model material discharge nozzle 21 and the support material discharge nozzle 22 of the head unit 20. By discharging to an appropriate position on the modeling plate 40, a cross-sectional shape based on the cross-sectional data given from the computer PC is modeled. Then, the model material MA, which is one of the modeling materials discharged onto the modeling plate 40, is at least cured to be changed from a liquid or fluid state to a solid and cured. This action creates a cross section or slice. Note that the slice data may be generated on the 3D modeling apparatus 2 side, but in that case, the modeling parameters that the operator must determine such as the thickness of each slice layer are 3D modeling from the computer PC side. Must be sent to device 2.
(slice)

  Here, the “slice” is a stacking unit in the z direction of the modeled object, and the number of slices is a value obtained by dividing the height by the stacking thickness. Actually, as a requirement for determining the thickness of each slice, the minimum unit discharge amount that can be discharged from each discharge nozzle, the variation due to the eccentricity of the roller of the roller unit 25 in the vertical direction, and the like can be set. The thickness is determined. The value set based on such a viewpoint is set as the minimum value of the slice, and thereafter, the user obtains the modeling object, for example, each slice amount can be finally determined from the viewpoint of modeling accuracy and modeling speed. . In other words, if the user chooses to give priority to modeling accuracy, each slice amount is determined by the above-described minimum slice value or a value in the vicinity thereof, while if the modeling speed is given priority, the minimum modeling accuracy is maintained. Each slice amount can be determined. Or, as another method, a method of letting the user select the ratio of modeling accuracy and modeling speed sensuously, or by letting the user input the maximum allowable modeling time, some combinations of modeling time and modeling accuracy Can be displayed as candidates, and the conditions that the user prefers can be selected.

  In addition, the modeling action for one slice data is that the model material discharge nozzle 21 and the support material discharge nozzle 22 are at least in the forward path or the return path when the head section 20 is reciprocated in the X direction (the main scanning direction of the head section 20). The modeling material is discharged from the liquid in a liquid or fluid state by an ink jet method, and the surface of the uncured modeling object is smoothed at least in the outward path or the return path in a state where the modeling object discharged on the modeling plate 40 can flow. In order to make the roller part 25 act, a series of steps of curing the modeled object is performed at least once by irradiating the smoothed surface of the modeled object with light of a specific wavelength from the curing means 24. Of course, this number is automatically changed according to the thickness of the slice data and the required modeling accuracy. No. If the modeling material used for modeling is cured at a predetermined temperature, in the present invention, the curing means 24 can be a cooling or heating means, and if it can be naturally cured, the curing means is omitted. You can also

On the other hand, the maximum thickness formed once on the modeling plate is discharged from the model material discharge nozzle 21 and the support material discharge nozzle 22 at least in the forward path or the return path, and the cross-sectional shape after the discharged liquid droplets have landed However, it is determined by the unit discharge amount that can keep a substantially circular shape.
(Modeling plate 40)

  The modeling plate 40 can be moved up and down by the Z-direction drive unit 32. When one slice is formed, the Z-direction drive unit 32 is controlled by the control means 10, and the modeling plate 40 is lowered by a distance corresponding to the thickness of one slice. Then, by repeating the same operation as described above, a new slice is stacked on the upper side (upper surface) of the first slice. A thin object is formed by laminating several thin slices produced in this way.

  Further, in the case where the modeled object has a so-called overhang shape projecting in the XY plane from the modeled part positioned below in the height direction in the Z direction (that is, the height direction), the modeled object is displayed on the computer PC. An overhang support portion shape is added as necessary when converting to data. In other words, a modeled object having an overhang shape is a modeled object having a part (overhang part) in which a slice of a new model material is molded on an upper surface of a part where a slice of the model material already formed does not exist. is there. And the control means 10 models overhang support part SB based on the shape of the overhang support part simultaneously with modeling of model material MA which comprises the last molded article. Specifically, the overhang support portion SB is formed by discharging a support material SA different from the model material MA from the support material discharge nozzle 22 as a droplet. After the modeling, the target three-dimensional modeled object can be obtained by removing the support material SA constituting the overhang support part SB.

  As shown in the plan view of FIG. 3, the head unit 20 is moved in the horizontal direction, that is, the XY direction by the head moving means 30. The head unit 20 is supported by an X-direction moving rail 43 that is a pair of X-direction (main scanning direction) guide mechanisms that are arranged vertically in the drawing. On the base side that supports the head unit 20, a drive unit (not shown) in the X direction is provided along one X-direction moving rail 43. In addition, a Y-shaped moving rail 44 for moving the head unit 20 in the Y direction (sub-scanning direction) is provided on a portal frame on which the head unit 20 is placed on the X-direction moving rail 43. A drive unit (not shown) for driving the head unit 20 along the Y-direction moving rail 44 is placed. With these driving units, the head unit 20 can move in the X and Y directions.

  Further, the head unit 20 shown in the example of FIG. 4 is divided into an ejection head unit 20A provided with an ejection nozzle and a recovery / curing head unit 20B provided with a roller unit and a curing means. Between the discharge head unit 20A and the recovery / curing head unit 20B, a rail guide 45 through which a Y-direction moving rail 44 for moving the head unit 20 is provided. As shown in the plan view of FIG. 3, the head unit 20 reciprocates in the Y direction along the Y direction moving rail 44. Further, both ends of the Y-direction moving rail 44 are supported by the head moving means 30. The head moving means 30 reciprocates in the X direction along a pair of X direction moving rails 43 provided in parallel along the top and bottom of the modeling plate so as to straddle the modeling plate 40 in the vertical direction. Thereby, the head unit 20 can move to an arbitrary position on the XY plane on the modeling plate.

  Further, as shown in FIG. 1, the modeling plate 40 is moved in the height direction, that is, the Z direction by the plate lifting / lowering means (Z direction driving unit 32). Thereby, the relative height of the head part 20 and the modeling plate 40 can be changed, and three-dimensional modeling becomes possible. More specifically, the head unit 20 first discharges the model material MA and the support material SA as modeling materials from the model material discharge nozzle 21 and the support material discharge nozzle 22 to appropriate locations based on the slice data by the head moving unit 30. Therefore, the model material MA and the support material SA are discharged from a plurality of orifices that are reciprocated in the X direction and are provided in the discharge nozzles 21 and 22, respectively, and extend in the Y direction. Furthermore, as shown in FIG. 3, the width in the Y direction of each discharge nozzle 21, 22 is smaller than the width in the Y direction that can be formed on the modeling plate 40, and the width in the Y direction of the model data for modeling Is larger than the total length of the orifice extending in the Y direction, the reciprocating operation in the X direction at a predetermined position of each discharge nozzle 21, 22 is followed by shifting each discharge nozzle 21, 22 in the Y direction by a predetermined amount, Along with the reciprocating scanning in the X direction, the model material MA and the support material SA are repeatedly ejected to appropriate locations based on the slice data, thereby generating the modeled objects corresponding to all set modeled object data. Do.

In addition, in the example of FIG. 1, the plate raising / lowering means which raises / lowers the modeling plate 40 is used as the Z direction drive part 32, However, it is not restricted to this example, Like 3D modeling apparatus 2 'shown in FIG. It is also possible to employ a Z-direction drive unit 32 ′ that fixes the 40 side in the height direction and moves the head unit side in the Z direction. Further, the movement in the XY direction may be performed by fixing the head portion side and moving the modeling plate side. Further, as described above, the shift in the Y direction of the head unit 20 is not necessary if the width of each nozzle is substantially the same as the width of the modeling plate 40 in the Y direction. Even in this case, for example, for the purpose of increasing the resolution in the Y direction of the modeled object determined by the interval between the orifices provided in the nozzles, each of the orifices becomes an orifice at the time of the previous modeling by shifting the head part 20 in the Y direction. And may be shifted so that it is located between the orifice and the orifice.
(Control means 10)

  The control means 10 controls the discharge pattern of the modeling material. That is, the head member 20 is reciprocally scanned in the X direction while the model material MA and the support material SA are ejected onto the modeling plate 40 by the modeling material ejecting means in at least one of the reciprocal scanning in the X direction. Then, after the modeling material is discharged onto the modeling plate by the modeling material discharge unit and at least one of the outward path and the return path, the model material MA and the support material SA are cured by the curing unit 24, Slice is generated, and modeling is performed by moving the relative position of the modeling plate 40 and the head unit 20 in the height direction and repeating the stacking of slices. Although the details will be described later, the surface of the modeling material by the roller unit 25 is smoothed after the modeling material is discharged onto the modeling plate by the modeling material discharging unit and the surface of the modeling material is cured by the curing unit 24. It is carried out on at least one of the outbound path and the inbound path before making it.

  The control means 10 discharges either the modeling material MA or the supporting material SA in one reciprocating scan in the X direction, and smoothes the surface of the modeling material by the roller unit 25 and removes the excess material. Then, after further curing by the curing means 24, the other modeling material that was not discharged is discharged in the next and subsequent reciprocating scans, and the surface of the modeling material is smoothed and cured. By performing these series of steps at least once, one slice is generated. Needless to say, the series of steps corresponding to one slice of data includes repeating a plurality of times depending on, for example, the final surface accuracy and modeling time required by the user. As a result, either the model material MA or the support material SA can be cured individually by smoothing and curing the surface of the model material MA or the support material SA, and then discharging the other. The advantage that mixing at the heterogeneous modeling material interface of SA can be effectively avoided is obtained.

In this example, the model material MA is discharged first and then the support material SA is discharged. However, the support material may be discharged first, and then the model material may be discharged. Also, in this example, one of the modeling materials is discharged first, and after this is cured, the other modeling material is discharged and cured, and the model material and the support material are separately discharged and cured. Explained how to do. However, the present invention is not limited to this method, and the model material and the support material can be discharged simultaneously.
(Modeling material)

As described above, as the modeling material, the model material MA that becomes a final modeled object and the support material SA that supports the projecting portion from which the model material MA projects and is finally removed are used.
(Curing means 24)

As the model material MA, a light curable resin, for example, an ultraviolet curable resin can be used. In this case, the curing unit 24 is a light irradiation unit that emits light including a specific wavelength at which the material of the model material MA reacts and cures, and is an ultraviolet irradiation unit such as an ultraviolet lamp. As the ultraviolet lamp, a halogen lamp, a mercury lamp, an LED or the like can be used. In this example, the support material SA is also an ultraviolet curable resin. In the case of using an ultraviolet curable resin that is cured with ultraviolet rays having the same wavelength, the same ultraviolet irradiation means can be used, and an advantage that a light source can be shared is obtained.
(Model material MA)

  A thermoplastic resin can also be used as the model material MA. In this case, the curing unit 24 serves as a cooling unit. When using a thermoplastic resin for both the model material and the support material, by adopting a model material whose melting point is higher than the melting point of the support material, the molded object is higher than the melting point of the support material after the completion of lamination, The support material can be melted and removed by heating and keeping the temperature lower than the melting point of the model material. Furthermore, one of the model material and the support material can be a photo-curing resin, and the other can be a thermoplastic resin.

Alternatively, a material that can be cured by a chemical reaction with the curing material can be used as the model material. Further, the model material may be mixed with a liquid modifier as necessary in order to adjust the jetting characteristics such as viscosity and surface tension. Also, the injection characteristics can be changed by adjusting the temperature. Other examples of the model material include an ultraviolet photopolymer, an epoxy resin, an acrylic resin, and urethane.
(Support material SA)

As the support material SA, basically, the same material as the model material described above can be used. However, it is desirable to add a removable material to a material similar to the model material from the viewpoint that the support material is finally a material that can be easily removed. Therefore, specifically, water swelling gel, wax, thermoplastic resin, water-soluble material, soluble material and the like can be used. For the removal of the support material SA, a method such as separation using a thermal expansion difference, which is dissolved by power washing such as aqueous solution, heating, chemical reaction, water pressure washing, or electromagnetic wave irradiation, depending on the properties of the support material, can be used as appropriate. .
(Head 20)

  FIG. 4 shows an example of the head unit 20 of the inkjet three-dimensional modeling apparatus. The head unit 20 shown in this figure is provided with a dedicated discharge nozzle that individually discharges the model material MA and the support material SA as a modeling material discharge means. Specifically, a model material discharge nozzle 21 for discharging the model material MA and a support material discharge nozzle 22 for discharging the support material SA are provided in parallel with each other. Each discharge nozzle is provided with two nozzle rows 23.

  In the head portion 20, a support material discharge nozzle 22, a model material discharge nozzle 21, a roller portion 25, and a curing unit 24 are integrally provided from the left. Each discharge nozzle discharges an ink-shaped modeling material in the manner of a piezoelectric element type ink jet print head. The modeling material is adjusted to a viscosity that can be discharged from the discharge nozzle.

In the example of FIG. 4, after the head portion 20 discharges the model material MA first, the support material SA is discharged. In addition, the head unit 20 discharges the modeling material on the outward path (left to right in the figure), and on the return path (right to left in the figure), scrapes excess resin from the outermost surface of the modeling material by the roller unit 25 to achieve smoothing. Thereafter, the smoothed resin is cured by the curing means 24.
(Roller part 25)

  The head unit 20 further presses the surfaces of the discharged model material MA and the support material SA in an uncured state, and removes the excess of the modeling material, thereby smoothing the modeling material surface 25. Is provided. Such an operation of the roller portion 25 will be described with reference to the schematic diagram of FIG. This example shows a state in which the surface of the discharged model material MA is leveled by the roller body 26 in an uncured state. The roller unit 25 includes a roller main body 26 that is a rotating body, a blade 27 that is disposed so as to protrude from the surface of the roller main body 26, a bus 28 that stores a modeling material scraped off by the blade 27, and a bus 28. And a suction pipe 29 for discharging the modeling material accumulated in the container. The roller body 26 is rotatably supported, and the uncured resin is pressed while rotating, so that the surplus portion is scraped and collected while leveling the surface of the resin. The roller body 26 is rotated counterclockwise (clockwise in FIG. 5) with respect to the traveling direction of the head portion 20 when the roller body 26 scrapes off excess resin, and scrapes off the uncured modeling material. The modeling material thus scraped up adheres to the roller body 26 and is carried to the blade 27, and then scraped off by the blade 27 and guided to the bus 28. For this reason, the blade 27 is disposed at a position behind the roller body 26 with respect to the traveling direction when the roller body 26 abuts on the resin surface, and is fixed in a downward gradient toward the bus 28. Similarly, the bath (bath) 28 is also disposed on the same side as the blade 27 with respect to the roller body 26 and is disposed below the blade 27. The suction pipe 29 is connected to a pump, and sucks and discharges the modeling material accumulated in the bus 28. In this example, the outer shape of the roller body 26 is about φ20 mm.

  The roller portion 25 is scraped when the head portion 20 advances from the right to the left in the figure.

  The roller portion 25 scrapes off when the head portion 20 advances from the right to the left in the drawing. In other words, when the model material MA and the support material SA are discharged from the model material discharge nozzle 21 and the support material discharge nozzle 22 to the appropriate positions based on the slice data while the head portion 20 advances from the left to the right, respectively. The roller portion 25 does not contact the modeling material, and similarly, illumination from the light source of the curing means 24 is not performed. In the illustration of the main scanning direction from the left to the right of the head unit 20 in the figure, the main scanning direction as a return path from the right to the left after at least the modeling material is discharged from the nozzles 21 and 22 in the forward path. Then, the above-described scraping operation of the roller unit 25 is performed, and at least the curing means 24 as a light source for irradiating light for curing the model material MA is also operated.

  The light source of the curing unit 24 is disposed forward of the model material discharge nozzle 21 and the support material discharge nozzle 22 with respect to the traveling direction. Therefore, even when the light source is turned on, the light is discharged and smoothed by the roller unit 25. The flowable resin before irradiation is not irradiated. On the other hand, it is of course possible to turn off the light source of the curing means 24 except when it is actively required. On the other hand, a plurality of curing means may be provided. For example, a first curing unit and a second curing unit are provided as the curing unit, and the resin after discharge is preliminarily cured by the first curing unit, and then the resin is further cured by the second curing unit. Thus, by making a hardening means multistage structure, the hardening ability of resin can fully be exhibited. In such a case, if the first curing means remains in preliminary curing and sufficient fluidity still remains in the resin after passing through the first curing means, the roller after the preliminary curing by the first curing means The excess resin may be scraped off at the portion, and then cured by the second curing means. That is, it is not always necessary that all the curing means be disposed on the next stage side of the roller portion.

  As shown in FIGS. 1 and 4, the roller portion 25 is disposed in front of the curing means 24, on the left side in the figure, with respect to the traveling direction of the head portion 20. As a result, after the uncured modeling material is scraped off by the roller unit 25 first, the curing means 24 cures the modeling material. With such an arrangement, the modeling material can be scraped and cured in the same pass, and the advantage of being able to be processed efficiently is obtained.

  The basic concept of the arrangement of the support material discharge nozzle 22, the model material discharge nozzle 21, the roller unit 25, and the curing means 24 along the X-axis direction is as follows. Considering the forward direction of the head unit 20 in the main scanning direction as a base, one of the support material discharge nozzle 22 and the model material discharge nozzle 21 may be positioned in front of the other. With respect to such a nozzle layout, the roller unit 25 and the curing means 24, when it is desired to perform the action of the roller in the forward path, in the forward travel direction, behind the support material discharge nozzle 22 and the model material discharge nozzle 21 When the roller unit 25 and the curing means 24 are arranged in this order and the action of the rollers is to be performed in the return path, the roller unit 25 and the support material discharge nozzle 22 and the model material discharge nozzle 21 are moved backward in the direction of travel of the return path. What is necessary is just to arrange | position in order of the hardening means 24.

  Moreover, in the said Example, after discharging resin for becoming a new uppermost layer from the head part 20, with respect to the resin layer of the uncured uppermost layer in the middle of modeling, the excess resin by the roller part 25 of After scraping, a method of irradiating UV light for curing at least the uppermost resin layer by the curing means 24 was adopted.

However, in addition to this configuration, the curing means can be configured in multiple stages as described above. For example, after a resin for forming a new uppermost layer is discharged from the head unit 20, the uppermost layer including the surplus resin layer is once irradiated with light by the curing unit 24, and then the uncured state of the uppermost layer in the middle of modeling is irradiated. There is also a method in which the upper resin layer is scraped off by the roller portion 25 and then irradiated with UV light for curing at least the uppermost resin layer by the curing means 24 again. In this case, the curing means 24 is provided with a pair of curing means in the head portion 20 in the front-rear direction sandwiching the support material discharge nozzle 22 and the model material discharge nozzle 21 in the X direction, that is, the main scanning direction of the head portion 20. Thus, the above-described irradiation can be performed twice. In this case, the first irradiation and the second irradiation are combined to finally achieve the desired degree of curing of the resin, so the resin after the first irradiation is not in a cured state, In order to enable the subsequent scraping operation by the roller portion 25, the fluid portion is in a semi-cured state. For this reason, in this specification, the state of the uppermost layer before scraping off the resin by the roller part 25 is expressed as an uncured or flowable state.
(Width of roller section 25)

  Here, the width of the roller portion 25 is formed narrower than the width of the model material discharge nozzle 21 provided in the modeling material discharge means and the width of the support material discharge nozzle 22. In each nozzle, a plurality of resin discharge orifices formed so as to be substantially parallel to the sub-scanning direction orthogonal to the main scanning direction of the head unit 20 are arranged with a predetermined interval. And the width | variety of each nozzle mentioned above means the distance between the orifices located in the both ends in the subscanning direction in each nozzle. That is, it means that the width of the roller portion 25 is narrower than the distance between the orifices located at both ends in the sub-scanning direction of each nozzle.

  Here, the distance between the orifices means that each orifice provided in each of the model material discharge nozzle 21 and the support material discharge nozzle 22 is in the X direction with respect to the head unit 20, that is, main scanning of the head unit 20. The definition is based on the premise that they are arranged in a straight line in the direction. In other words, the position in the main scanning direction discharged from each orifice of the model material discharge nozzle 21 and the position in the main scanning direction discharged from each orifice of the support material discharge nozzle 22 all overlap. It is assumed that the model material discharge nozzle 21 and the support material discharge nozzle 22 are positioned and arranged with respect to the head portion 20.

  Further, as shown in the bottom view of the head portion 20 shown in FIG. 6, a plurality of model material discharge nozzles 21, two support material discharge nozzles 22 in the figure, and one model material discharge nozzle 21 or support material discharge are used. In some cases, the other model material discharge nozzle 21 and the support material discharge nozzle 22 are offset with respect to the nozzle 22 in the sub-scanning direction and positioned with respect to the head unit 20.

  Originally, the basic aim of using such a plurality of model material discharge nozzles 21, two in the figure and a plurality of support material discharge nozzles 22, is provided in one model material discharge nozzle 21 or support material discharge nozzle 22. By offsetting the position of the orifice in the sub-scanning direction with respect to the position of the orifice provided in the other model material discharge nozzle 21 or the support material discharge nozzle 22 in the sub-scanning direction, the resolution in the Y direction of the model material or the support material It is to improve. That is, the orifice provided in the other model material discharge nozzle 21 or the support material discharge nozzle 22 is arranged in the sub-scanning direction between two adjacent orifices provided in the one model material discharge nozzle 21 or the support material discharge nozzle 22. Positioning is performed. In such a case, the meaning of forming the width of the roller portion 25 in the present invention narrower than the width of the model material discharge nozzle 21 provided in the modeling material discharge means and the width of the support material discharge nozzle 22 is as follows. become.

  The width of the model material discharge nozzle 21 in the case where the plurality of model material discharge nozzles 21 are arranged offset in the sub-scanning direction is the outermost at one end portion in the sub-scanning direction among the plurality of model material discharge nozzles 21. This means that the width of the roller portion 25 is made narrower than the distance from the position of the arranged orifice to the position of the outermost arranged orifice at the other end in the sub-scanning direction. The same applies to a plurality of support material discharge nozzles 22 employed in the same system. Similarly to the basic system described above, in this system, the position in the main scanning direction discharged from each orifice of the model material discharge nozzle 21 and the discharge from each orifice of the support material discharge nozzle 22 are also provided. It is assumed that the model material discharge nozzle 21 and the support material discharge nozzle 22 are positioned and arranged with respect to the head unit 20 so that all the positions in the main scanning direction are overlapped.

  The width of the roller portion 25 described above means a substantial width used when scraping excess resin on the roller surface of the roller portion 25 in the axial direction of the roller portion 25, that is, in the sub-scanning direction. Even if the apparent width is larger than the width of the model material discharge nozzle 21 and the width of the support material discharge nozzle 22, the width of the roller that performs the scraping function, which is essentially the original function of the roller portion, is the model. What is necessary is just to be narrower than the width of the material discharge nozzle 21 and the width of the support material discharge nozzle 22.

  In addition, the roller diameter is changed by attaching a step from the roller part that does not substantially scrape excess resin formed at the end of the roller to the roller part that substantially scrapes excess resin. The diameter of the roller portion may be gradually increased from the roller portion formed at the end portion of the roller having no function of scraping off excess resin toward the roller portion that substantially scrapes off excess resin. It may be changed to.

  FIG. 6 shows an example of a bottom view of the head unit 20. In the example shown in this figure, the model material discharge nozzle 21 and the support material discharge nozzle 22 are offset from each other in two rows of discharge nozzles. Since the width D1 of each model material discharge nozzle 21 and the width D2 of the support material discharge nozzle 22 are substantially equal and the offset amount is also substantially equal, the discharge width DN of the entire discharge nozzle is also the model material discharge nozzle 21. And the support material discharge nozzle 22 are substantially equal. The width DR of the roller portion 25 is narrower than the discharge width DN of the discharge nozzle. Thus, by making the width of the roller portion 25 shorter than the discharge width DN, even when the same layer (slice) is divided into a plurality of regions as shown in FIG. 7 (in the example of FIG. 7, the region R1, R2) When the roller portion 25 presses the right region R2, it does not come into contact with the already shaped portion (left region R1 in FIG. 7), and enables large area modeling with high accuracy. Moreover, since the cured resin is not recovered by mistake, it is possible to avoid a situation where the suction pipe is clogged. Further, the amount of adjustment of the deflection and inclination of the roller portion may be equal to or less than the thickness of one slice, and the difficulty of adjustment during creation and attachment of the roller portion can be reduced. Here, the width of the roller portion 25 is shorter than the orifices located at both ends of the model material discharge nozzle and the support material discharge nozzle by a half pitch of the interval between the orifices (0.5 mm). For example, when the interval between the orifices is 1 mm, the width of the roller portion 25 is formed shorter by 0.5 mm from the orifices located at both ends of the model material discharge nozzle and the support material discharge nozzle.

  By making the roller portion 25 shorter than the discharge width, there is a portion where the roller portion 25 cannot collect the resin, such as a portion surrounded by a broken line shown in FIG. However, immediately after the roller portion 25 collects the surplus resin, the resin is in a liquid state, so the state as shown in FIG. 8A is not maintained, and the shape cannot be maintained by its own weight. As shown in FIG. As a result, the molding is almost the same as when all the rollers 25 are collected, and practical problems hardly occur. In an actual example, the thickness of the surplus resin scraped off from the uppermost surface of the modeled object is, for example, less than several tens of μm, more preferably 50 μm or less, and the height of the resin left after scraping is the same as that. Therefore, it can be said that there is no practical problem.

  Further, when resin is discharged based on slice data having an arbitrary thickness by the modeling material discharge unit, printing can be performed by offsetting the resin discharge position in the sub-scanning direction in the previous sub-scanning direction. In this way, by changing the portion where the roller portion 25 is not applied for each slice layer, the influence of remaining unrecovered resin can be made uniform and suppressed without being accumulated. More specifically, the resin is discharged while moving the first slice layer in the main scanning direction at a predetermined sub-scanning position, and the sub-scanning position is maintained and the roller portion 25 scrapes off excess resin. After that, the next slice layer is moved from the predetermined position in the sub-scanning direction by a certain distance, and then the resin is discharged while moving in the main scanning direction at the sub-scanning position, and the sub-scanning position is maintained. The excess resin is scraped off by the roller portion 25.

  Furthermore, as shown in FIG. 6, in a state where the model material discharge nozzles 21 are arranged in a plurality of rows and offset shapes, the width of the roller portion 25 is narrower than the width of the union of the plurality of rows of the model material discharge nozzles 21. It is preferable to form. Thereby, the resolution is improved by arranging the model material discharge nozzles 21 in an offset manner, and the width of the roller portion 25 is shortened with respect to the offset model material discharge nozzles 21 to divide the same slice into a plurality of regions. Even in the case of modeling, the roller part 25 is not brought into contact with the modeled object, and accurate modeling can be performed.

  Furthermore, by changing the portion to which the roller portion is not applied by slicing, it is possible to prevent the influence of remaining unrecovered resin from being accumulated. That is, by changing the position of the boundary of the region for each slice, it is possible to suppress a situation where only the boundary portion becomes high. For example, in the example of FIG. 9, the resin discharge position is offset by the control means 10 so that the next-stage boundary P2 is positioned in the middle of the boundary P1 between the regions discharged in the previous stage. Thereby, even if it is shaped slightly higher as a result of the previous slice, the amount of uncured resin raised in the next slice is collected by the roller unit 25, so the effect in the height direction does not accumulate, The problem that unrecovered resin remains can be avoided and suppressed.

As described above, according to the above embodiment, even when the same slice is divided into a plurality of regions when the shaped object is discharged, the roller part is prevented from colliding with the cured resin, and the quality of the shaped object is improved. Can be improved.
(Roller rotation speed control means 12)

  In the three-dimensional modeling apparatus shown in FIGS. 1 and 2, the control means 10 includes a roller rotation speed control means 12. When the roller main body 26 individually collects the model material MA or the support material SA, the roller rotation speed control unit 12 determines whether the roller rotation speed control means 12 is a roller according to the physical characteristics of the model material MA or the support material SA discharged from each discharge nozzle. The rotational speed of the main body 26 is changed. In particular, in the present embodiment, each resin of the model material MA and the support material SA is not simultaneously discharged but individually recovered, individually recovered, and individually cured. Therefore, the rotational speed of the roller body 26 can be changed according to the physical characteristics of each resin when each resin is collected.

  The main physical characteristics of each resin here include the uppermost surface of the modeled object and the viscosity and surface tension of the resin in the vicinity before being scraped off by the roller body 26. However, the actual optimum rotation speed of the roller section is basically determined by the viscosity and surface tension of the resin on the top surface of the object and the vicinity, based on actual experiments for each actual model material and support material used for modeling. In addition to the setting based on the verification of the optimum rotation speed, it is determined in consideration of modeling condition parameters such as the moving speed of the head part in the X direction and the resin discharge amount per unit time from the head part, and based on this A roller speed determination table is created and stored. In this case, the rotational speed determination table of the roller unit may be stored in either the setting data creation device 1 or the three-dimensional modeling device 2.

  Actually, the various parameters described above are calculated according to the modeling conditions selected by the operator, and based on the results, the optimum rotation for each of the model material removal and the support material removal of the roller part based on the conditions selected by the operator from the above table. The speed can be determined.

  Further, as such a table, the rotation speed of the roller body 26 has different values (binary values) for the model material collection and the support material collection, so that the resin can be collected at a rotation speed suitable for each resin. In addition, mixing of the interface between the model material MA and the support material SA can be reduced.

  In the example of FIGS. 1 and 2, the roller rotation speed control means 12 is integrated with the control means 10. Such a control means 10 can be constituted by an MPU or the like. However, it goes without saying that the roller rotation speed control means and the control means may be separate members.

Hereinafter, this procedure will be described with reference to the schematic diagrams of FIGS. 10A to 10D and the flowchart of FIG. First, in step S1101, the support material SA is discharged as shown in FIG. In step S1102, the roller body 26 is rotated and pressed at a rotation speed a suitable for the support material SA as shown in FIG. Thereafter, the support material SA is cured. In step S1103, the model material MA is discharged as shown in FIG. In step S1104, the roller unit 25 is pressed while rotating at a rotational speed b suitable for the model material MA as shown in FIG. In this way, by changing the rotational speed of the roller portion 25 when collecting each resin according to the physical characteristics of each resin used as the support material SA and the model material MA, Mixing of the interface with the support material SA can be reduced. Here, as the physical characteristics of the resin, the viscosity and surface tension of the resin can be used. However, as another factor for changing the rotation speed of the roller portion 25, in addition to the physical characteristics of the resin, as described above, the moving speed of the head, the amount of resin discharged per unit time, that is, the thickness of one slice. Can be mentioned. For example, in the present invention, it is assumed that the layers of the model material and the support material are formed in separate steps. When performing modeling in such a process, the discharge amount per unit time can be appropriately determined from the viewpoint of modeling speed and modeling accuracy. For example, since the support material is removed in a subsequent process, modeling accuracy is not required as much as the model material. Therefore, the modeling speed can be increased by modeling the model material by increasing the discharge amount per unit time of the support material. The rotational speed of the roller portion 25 is preferably set appropriately when scraping off the model material and the support material from the viewpoint of these modeling speed and modeling accuracy.
(Evaluation test)

Here, as an evaluation test for confirming the effectiveness of the present embodiment, the modeled object shown in FIG. 12 is created by changing the rotation speed (rotation number) of the roller body 26, and the modeled object after the support material is removed is prepared. Compared. The results are shown in Tables 1 and 2. Table 1 shows the state in which the rotational speed was changed to 469 to 1125 pps, mainly for the recovery of the model material MA, and Table 2 shows the state in which the rotational speed was changed to 375 to 1125 pps, mainly for the recovery of the support material SA. , Respectively. The model material MA used here has a viscosity of 45 mPa · s and a surface tension of 30 mN / m, and the support material SA has a viscosity of 80 mPa · s and a surface tension of 34 mN / m. In addition, as shown in FIG. 12, the modeled object is made up of four sheets with a thin wall having a thickness of several hundreds μm spaced apart, and a support material SA is arranged around the object. The results of modeling such a thin wall by changing the number of rotations of the roller body 26 are shown in Tables 1 and 2. In these tables, the thin wall is upright and the thin wall is Slightly bent is indicated by Δ, and thin walls are greatly deformed or not formed by ×. From these results, it was confirmed that the optimum rotational speeds of the model material and the support material are different, and it is effective to change the rotational speed according to the characteristics of the resin.

In this way, two types of resin, model material and support material, are collected at different times, and the rotational speed of the roller body at the time of collection is optimized according to each resin, thereby modeling the model material Can reduce the mixing of the interface with the support material. In particular, by individually curing the model material and the support material, it is possible to change the number of rotations of the roller body when the model material and the support material are collected, and the resin surplus depending on the physical characteristics of each resin. It is possible to obtain a high-quality molded article by suppressing mixing of the resin interface.
(Discharge control means 13)

  The control means 10 shown in FIGS. 1 and 2 includes a discharge control means 13. The discharge control means 13 is a molding material discharge means so as not to discharge the resin in a slice below the slice including the resin located on the uppermost surface of the modeled object or the resin located at the interface of the different type of modeling material where the type of resin is switched. To control. The discharge control means 13 also functions as a hollow part generating means for generating the hollow part ES in the vertical direction of the modeled object when generating the discharge data from the modeled object data described later. In this way, by providing a hollow portion that suppresses the discharge amount of the modeling material in the middle of the stacking direction, the model material MA or the support material SA on the uppermost surface or the different type modeling material interface is modeled below the original position. As a result, since the roller portion 25 is not contacted when the excess resin is collected, it is possible to avoid the generation of streaks and wrinkles by the roller portion 25 and to clean the surface finish of the modeling material.

  Conventionally, the accuracy of the shaped object has been realized by pressing the roller portion against all the laminated surfaces of the shaped object and scraping off excess resin. In this case, since the roller portion also comes into contact with the portion that becomes the surface of the modeled object, there is a problem that the wave pattern resulting from the unevenness of the roller body and the streaks on the surface of the roller body 26 are transferred to the modeled object surface. there were.

On the other hand, in the present embodiment, the discharge of the resin is limited so that the roller portion 25 is not brought into contact with the surface of the modeled object or the interface between different types of modeling materials where the resin is switched. That is, while discharging is performed on the surface and the interface, the roller portion 25 is prevented from coming into contact with the resin surface at the surface of the modeled object or at the interface between the different types of modeling materials by removing a part of the lower layer. Since the resin surface is smooth before the roller main body 26 is brought into contact with the roller main body 26, the accuracy of modeling is maintained without separation by separating from the roller main body 26 at the surface or switching interface, and the surface state of the molded object To improve. Specifically, a surface state improvement function is realized by the discharge control means 13.
(Surface condition improvement function)

  The place where the surface state improvement function of a present Example is applied is shown by taking the modeled object shown in FIG. 13 as an example. In this example, from the top, the uppermost surface A of the modeled object indicated by diagonal lines, the lower side thereof, the surface B where the support material SA switches from the model material MA, and the lower side thereof, the model material Surfaces C that switch from the MA to the support material SA are the targets. Both B and C become the surface of the model material MA when the support material SA is removed. Here, since the uppermost surface of the modeled object is the surface of the model material MA, it becomes noticeable when streaks, wrinkles, etc. are generated on the surface. For this reason, the roller portion 25 is not brought into contact with the outermost surface of the resin, thereby avoiding the formation of a pattern on the surface of the molded article. For this reason, when modeling a layer below an arbitrary number of layers from a layer having a part to be the surface of the modeled object, only the part directly below the part to be the surface of the modeled object is not discharged. Such discharge control is performed by the discharge control means 13. Here, the arbitrary number of layers is determined based on the discharge amount of the resin, the lamination thickness, and the like.

  For example, a state in which the surface state improvement function is executed on a step-like shaped article as shown in FIG. 14 will be described with reference to FIGS. In this shaped article, the surface is a portion surrounded by a broken line in the figure. If the number of arbitrary layers n = 1, the portion where no ejection is performed (referred to as “hollow portion ES”) is one layer from the top layer on the left side and the right side of the modeled object as shown in FIG. The white part in the figure below.

  In this example, the layer that does not discharge (hollow part ES) is a single layer, but it may not be discharged in multiple layers.

  By not discharging the white part shown in FIG. 15, the part which becomes the surface of a molded article does not reach a predetermined height, and the roller part 25 does not hit. In FIG. 15, taking the case of modeling the left fourth layer as an example, the state shown in FIG. 16 is reached at the end of modeling up to the third layer. When the fourth layer is ejected in this state as shown in FIG. 17, the amount ejected onto the hollow portion ES is slightly lower than the portion that is not (FIG. 18). If the roller part 25 is applied in this state, it will contact | abut only the modeling material of the right side part of FIG. 19, and will not contact the modeling material of the left side part which was not discharged by the front layer. For this reason, the pattern by the roller part 25 is not formed in the left surface of a modeling material, but it becomes a smooth surface. On the other hand, the roller portion 25 comes into contact with the right side of the modeling material, and the resin surplus is collected, so that the modeling accuracy is maintained.

  By providing the hollow part ES in this way, a state in which the roller part 25 does not hit for several layers continues for a while in a model to be modeled thereafter. By adjusting the number of layers and the discharge amount of the resin so that the modeling is completed during this time, the roller portion 25 does not hit the top surface of the modeled object, and the model can be modeled in a smooth surface state.

  Moreover, although the above demonstrated the upper surface of the molded article, the same process can be performed also about the lower surface of a molded article. On the bottom surface of the modeled object (for example, the surface indicated by B in FIG. 13), if the support material SA that is modeled thereunder has a pattern such as irregularities and stripes, the model material MA formed on the top surface The pattern will also be transferred. In order to avoid this, the lower surface of the model material MA can be formed smoothly by shaping the upper surface of the support material SA smoothly. Specifically, as described above, when the support material SA is stacked, as shown in FIG. 20, a hollow portion is formed by extracting a lower slice from the uppermost surface of the support material SA. Here, from the layer where the support material SA is switched to the model material MA, the hollow portion ES is formed in which the support material SA below the arbitrary number n of layers is not discharged. When such a support material SA is actually discharged and shaped, it becomes as shown in FIG. Even in this case, since the roller portion 25 does not come into contact with the uppermost layer of the support material SA, a smooth surface is obtained. Therefore, even if the model material MA is further formed on the upper surface of the support material SA, the interface between the different modeling materials between the model material MA and the support material SA, that is, the lower surface of the model material MA can be made smooth.

  In this way, by preventing the roller portion 25 from coming into contact with the surface of a modeled object such as the model material MA or the support material SA, a smooth modeled object having no wave pattern or streaks on the modeled material surface generated by the roller body 26 is modeled. It becomes possible to do.

Furthermore, a secondary effect can be expected by thinning out a layer in the middle of modeling. That is, for example, a streak may occur depending on the interval between the discharge nozzles such as the model material discharge nozzle and the support material discharge nozzle, but the influence of such a streak can be reduced. In addition, when there is a so-called undischarge nozzle, in which any of the plurality of discharge nozzles cannot discharge the resin due to clogging or the like, an undischarge bar is similarly generated along the locus of the undischarge nozzle. By providing the part ES, such non-discharge muscles can be made inconspicuous. As shown in FIG. 22, the landing position of the discharged resin is shifted downward from the normal as a result of the thinning of the layers to be discharged. This is because the unevenness is relaxed and such a pattern does not stand out. Thus, by providing the hollow part ES, an effect of making it difficult to expose the pattern on the surface of the modeling material can be expected.
(Determination method of hollow part ES)

The number of layers from the surface layer to form the hollow portion ES can be determined in consideration of the following two points. That is,
(1) The modeling material is sequentially modeled in the hollow part ES, so that the height difference is gradually reduced, and finally the height of the roller part 25 can be contacted. Whether or not the modeling is finished before the contact of (2) occurs, and (2) after the formation of the hollow portion ES, by discharging the modeling material, it is possible to sufficiently erase the already generated pattern or the like (For example, can you fill in the unevenness),
The discharge control means 13 determines so as to satisfy these two conditions.
(Example in the case where the roller portion 25 is not continuously applied)

For example, as shown in FIG. 23 (a), when the surface of the modeling material has already been greatly dented by the roller portion 25, or the undischarge nozzle is superimposed, the dent has grown greatly. In such a case, after forming the hollow portion ES which is a thinning layer, there is a case where one layer discharged on the hollow portion ES cannot sufficiently fill the recess. In such a case, it is conceivable that the layer that does not discharge, that is, the hollow portion, is not directly under the surface, but is disposed at a position spaced downward from the surface as shown in FIG. By doing so, several layers without applying the roller portion 25 are continuous, and as shown in FIG. 23 (c), the effect of filling the hole is superimposed, and the concave portion is gradually eliminated to make it inconspicuous. . In this way, by separating the position where the hollow portion is provided downward from the surface, it is possible to compensate for unevenness that cannot be filled with only one layer.
(Discharge limit)

  Moreover, in the above example, in order to form a hollow part, the method of not discharging resin in the whole slice was demonstrated. However, in this invention, a hollow part is not restricted to such a structure. In other words, not only does the hollow portion not be a non-ejection slice that does not completely discharge the resin, but also the hollow portion with a reduced resin discharge amount prevents the roller from hitting the modeling material of the layers that are subsequently laminated. It is also possible to make it. In particular, if a discharge nozzle capable of controlling the discharge amount of resin is used, it is possible to form a layer in which such a resin amount is reduced. For example, when the discharge nozzle is controlled by the voltage applied to the piezoelectric element, the resin discharge amount can be controlled by changing the voltage value, pulse width, frequency, etc. of the voltage applied to the piezoelectric element. The amount of resin discharged per hour can be adjusted. This control is executed by, for example, the discharge control means 13.

  Here, the procedure for modeling each slice while performing such discharge restriction is shown in FIGS. Here, as shown in FIG. 24A, in the lamination of a total of seven layers of slices S1 to S7, the discharge amount of the model material MA is limited in slices S3 and S6 so as to define the hollow portion ES ′ in the slices S3 and S6. Forming. In other words, the hollow portion ES ′ is not a block that does not completely discharge the modeling material, but the discharge amount of the modeling material is reduced, and the volume of the hollow portion ES ′ is slightly smaller than the above-described example of the hollow portion ES. ing.

  First, as shown in FIG. 24B, the model material MA is sequentially discharged and cured for the two layers from the slices S1 to S2, and the blocks B1 and B2 are stacked. Then, in discharging the slice S3, the amount of the model material MA discharged onto the block B2 is limited to be normal on the right side (block B3), but smaller than the normal slice in the left region. (Block B3 ′). When the roller body 26 is applied in this state, excess resin is recovered for the block B3 of the right model material MA, while the roller body 26 does not contact the block B3 'for the left model material MA. For this reason, the unevenness of the roller body 26 and the generation of wrinkles are avoided on the surface of the block B3 '.

  Next, in the stacking of the slices S4, as shown in FIG. 24C, the model material MA is discharged on the block B3 by a normal amount (block B4), and the model material MA is similarly applied on the block B3 ′. The ink is discharged (block B4 ′). Thereafter, the roller body 26 is applied to the block B4, but the roller body 26 does not contact the uncured block B4 'even in this state. Here, as a result of the excess of the model material MA of the block B4 ′ being not scraped off, the block B4 ′ is laminated thicker than a normal slice, and the final height of the model material layer on the left side of the model is shown in FIG. Compared to FIG. 18, the difference is small although it is slightly lower than 24 (a).

  Further, as shown in FIG. 24D, the model material MA of the slice S5 is discharged onto the block B4, and the block B5 is laminated. Then, in the slice S6, when the model material is discharged onto the block B5, the block B6 'is thinly laminated by limiting the resin discharge amount. In this state, the roller body 26 rotates at the original height position, so that it does not contact the upper surface of the block B6 '. As a result, generation of wrinkles due to the pressing of the roller body 26 is prevented.

  Then, as shown in FIG. 24E, finally, the model material MA is discharged in the slice S7 (block B7 '). Even in this state, since the surface of the block B7 'does not come into contact with the roller body 26, it is possible to prevent wrinkles and the like from being transferred to the outermost model material.

As described above, the hollow portion ES ′ is not limited to the one in which the discharge is completely stopped in one slice, and can be formed by limiting the discharge amount. In other words, even if the hollow portion ES ′ is formed with a small discharge amount, it is sufficient if the uncured or fluid resin can be separated so as not to contact the roller body. Therefore, in the present invention, such a block with a reduced discharge amount is also included in the hollow portion.
(Determination of hollow part ES)

  The position of the hollow portion, that is, the position to thin out the modeling material is determined by the discharge control means 13 as described above. Here, an example of the procedure by which the discharge control means 13 determines the position of the hollow portion will be described. As described above, as for the portion provided with the hollow portion, the resin discharged thereon has a lower height than the other slices. As a result, the surface does not come into contact with the roller portion 25 and can be kept smooth. On the other hand, while repeating the stacking of slices, the height difference gradually decreases and finally comes into contact with the roller portion 25. Therefore, even if slices are stacked up to the uppermost surface or the heterogeneous modeling material interface, the position of the hollow portion, that is, the uppermost surface or the heterogeneous modeling material interface, as long as the upper surface of the portion where the hollow portion is provided does not contact the roller portion 25 The discharge control means 13 calculates how many layers are provided below. For example, the position of the hollow portion is set 1 to 10 slices below from the uppermost surface or the heterogeneous modeling material interface. Preferably, it is one slice below.

For example, when a hollow portion is provided in a portion where the model material MA is laminated, and the hollow portion is provided in the nth layer from the surface or the interface of the different shaped material, the calculation is performed so as to satisfy all of the following conditions.
(1) One layer on the hollow portion is the model material MA.
(2) The n-layer on the hollow portion is the model material MA.
(3) The n + 1 layer of the hollow part is blank (that is, there is no more modeling material, it is the outermost surface), or the support material SA (that is, at the heterogeneous modeling material interface between the model material MA and the support material SA) That is).

  A hollow portion is provided at a position (n layer) that satisfies the above conditions. For example, in the case where a hollow portion as shown in FIG. 15 is provided in the above-described shaped article shown in FIG. 14, the ejection data shown in FIG. 25B is obtained from the shaped article data in FIG. In this example, since the position where the hollow portion is provided is the first layer (N = 1) from the surface, the above conditions (1) and (2) are the same. If attention is paid to the slice S3 in the third layer from the bottom of FIG. 25B, the left portion is blank on the n + 1 = 2 layer, and therefore also satisfies the condition (3).

  Even if one layer of the model material is extracted, the model material MA is extracted at each part as shown in FIG. 25B, so that the change in the overall ratio is very small. In addition, since the roller portion 25 does not come into contact with the upper surface of the resin or at the interface between different types of modeling material, the hollow portion ES is slightly reduced as a result of forming the resin thicker without collecting the surplus resin. From these, the thickness of the molded article finally obtained is a level that can be almost ignored in terms of accuracy.

  Here, an example of a procedure by which the discharge control means 13 generates discharge data is shown in the flowchart of FIG. First, in step S1201, modeling object data is acquired. The model data is input, for example, as an STL file. Next, in step S1202, the region of the support material SA necessary for modeling the modeled object is calculated. In step S1203, necessary correction processing is performed. In step S1204, processing for improving the surface condition is performed (details will be described later). Finally, in step S1205, final ejection data is generated. In accordance with the ejection data generated in this way, the control unit controls the shaped article ejection unit of the head unit. Thereby, the ejection of the shaped object is controlled.

  Thus, the discharge control means 13 calculates the discharge data which performed the surface state improvement process with respect to the inputted modeling object data. The ejection data of each slice can be determined using the following logical operation, for example.

  Discharge data = Modeling layer & tile (Modeling layer & layer 1 & layer N & layer N + 1 layer)

  As an example, in the modeling material shown in FIG. 25A, if the slice S3 is a layer to be modeled, a logical operation is performed in the three layers S3, S4, and S5 shown in FIG. Here, the slice S3 which is a layer to be shaped is as shown in FIG. 27B, the slice S4 on the one layer is as shown in FIG. 27C, and the N layer is similarly shown in FIG. 27C. It becomes. Further, the slice ￣S5 on the ￣N + 1 layer is as shown in FIG. 27 (d), and the logical sum (erase portion) of these is as shown in FIG. 27 (e). Further, the negation is as shown in FIG. 27 (f). When the logical sum with the slice S3 of FIG. 27 (g) which is a layer to be shaped is obtained, the result is as shown in FIG. 27 (h). The ejection data of the slice S3 ′ is obtained.

  By performing such a logical operation on all layers, ejection data of each layer can be acquired. As a result, it is possible to create ejection data in which only a portion that satisfies the condition is not ejected.

  In the above example, the number of layers from which the model material is extracted as the hollow portion is one, but it goes without saying that a plurality of layers can be extracted.

In this way, the interface or outermost surface that changes from one type of modeling material to the other type of modeling material in the stacking direction is extracted from the modeling object data, and the resin is discharged to a position separated by a predetermined layer from the extracted interface. Or by generating discharge data in which a predetermined layer is provided for a layer with a limited discharge amount, the modeling can be controlled so that the roller does not hit the surface of the model. The generation of the discharge data is executed on the setting data creation device 1. That is, the setting data creation device 1 generates discharge data including the hollow portion ES based on the modeling object data, and transmits the ejection data to the three-dimensional modeling device 100. In addition, it is also possible to employ a configuration in which the generation of the discharge data is executed by the three-dimensional modeling apparatus 100 based on the model data received from the setting data creation apparatus 1. In any case, a discharge data storage unit is provided for storing discharge data in which a discharge pattern for each slice constituting the modeled object is recorded. As the ejection data storage means, a storage element such as a temporary memory or a nonvolatile memory can be used. Thereby, the surface state improvement function can be realized by processing the discharge data, and a hardware change related to the three-dimensional modeling can be eliminated, and an advantage that can be applied to an existing three-dimensional modeling apparatus is obtained.
(Setting data creation device for 3D modeling equipment)

  Next, a setting data creation device for instructing such three-dimensional modeling apparatus to provide data of a model will be described based on the block diagram of FIG. The setting data creation device 1 for a 3D modeling apparatus shown in this figure includes an input means 61 for acquiring 3D data such as CAD data, and the acquired 3D data, for example, STL (Stereo Lithography Data) data. Display means 62 for three-dimensionally displaying an object that is defined by the three-dimensional data converted into the three-dimensional data, parameter setting means 63 for setting a modeling parameter, and an object according to the set modeling parameter Calculating means 64 for calculating the optimum posture and arrangement position, and adjusting means for the user to finely adjust the optimum posture and optimum position calculated by the computing means 64 or to manually adjust the desired position and posture. 65, the setting data for driving the 3D modeling apparatus according to the determined posture and position are converted into a data format that can be read by the 3D modeling apparatus. To, and output means 66 for outputting the 3D modeling apparatus.

In addition, as described above, as an example of the three-dimensional modeling apparatus, a setting data creating apparatus that sends setting data of a three-dimensional shaped object to the inkjet three-dimensional modeling apparatus will be described. Does not specify the three-dimensional modeling apparatus to be used as an inkjet system, and is an effective technique as long as it is a three-dimensional modeling apparatus that uses a UV curable resin or a thermoplastic resin even in other systems.
(Discharge control procedure)

  Moreover, the procedure which produces | generates discharge data from modeling object data was demonstrated in the above example. However, without changing the data of the modeling object itself, when discharging the modeling material with the modeling material discharging means that actually performs modeling, control is performed to determine whether discharge is possible and to partially prohibit the discharging of the modeling material By doing so, a partial block extraction may be realized. In this case, the control unit such as the discharge control unit 13 limits the discharge operation of the modeling material discharge unit. If this method is used, it is possible to directly control the discharge with the modeling material discharge means without separately processing the discharge data, so that the resin of n layers is not discharged from the switching of the resin as the modeling material. Incorrect collection can be avoided.

As described above, in the present invention, the processing is not limited to the data processing for processing the given modeling object data to form the hollow part, and the hollow part is used in actual modeling while using the raw processing object data. It is also possible to use a method for performing the same control as in That is, when actually modeling on the 3D modeling apparatus side based on the modeling object data generated on the data setting apparatus side and not including the hollow portion, the 3D modeling apparatus is virtually hollow according to predetermined conditions. The discharge of the molding material is restricted in the same manner as the part is formed. For example, the discharge of the resin is stopped or the discharge amount is limited below the heterogeneous interface where the type of the resin is switched. In this case, it is not necessary to process the modeled data, and while performing modeling according to the existing modeled data, the resin is discharged in the same pattern as when the hollow part was virtually formed during actual modeling. Thus, it is possible to avoid a situation in which wrinkles and irregularities appear on the surface of the final modeled object. Thus, in the present invention, it is not always necessary to include the hollow portion in the modeling object data, and when finally modeling with the three-dimensional modeling apparatus, the discharge of the resin is stopped below the heterogeneous interface where the type of the modeling material is switched. Alternatively, it is sufficient if control can be performed so as to reduce the discharge amount. Therefore, the present invention includes a control method for limiting the amount of resin discharged in hardware in addition to a software control method for generating a hollow portion on data. In this way, the operation of the hardware such as the modeling material discharge means is directly operated without changing the method of forming the hollow portion ES by the data processing when creating the ejection data from the modeling object data, or the modeling object data. In any of the methods, modeling in which a predetermined number of slices are removed is possible, and while maintaining the model material remaining as a final modeled object, it is possible to avoid quality degradation due to erroneous recovery and troubles in resin recovery.
(Simultaneous modeling)

  Furthermore, in the above example, the model material and the support material can be individually modeled separately, in addition to the simultaneous modeling that models simultaneously. In the case of simultaneous modeling, the model material and the support material are discharged by one scan of the head portion, and the model material and the support material are simultaneously modeled in each slice. In this case, since the model material and the support material can be modeled by the same scanning, the modeling time can be shortened. On the other hand, in the case of individual modeling, only one modeling material of the model material or the support material is discharged and cured in one scan of the head portion, and the other modeling material is discharged and cured in the next scanning. Repeat the operation. According to this method, it is possible to avoid a situation in which the uncured or fluid resin is mixed and the surface state is deteriorated at the interface in the vertical direction where the model material MA and the support material SA are adjacent to each other in the same slice. In both of these simultaneous modeling and individual modeling, the surface condition improvement process described above is performed, and a hollow portion is provided below the upper surface or the interface of the different type modeling material, thereby causing surface streaks, wrinkles, etc. Can be avoided.

  3D modeling apparatus, 3D modeling method, setting data creation apparatus for 3D modeling apparatus, setting data creation program for 3D modeling apparatus, and computer-readable recording medium are ultraviolet curable resin by inkjet method Can be suitably used for three-dimensional modeling in which layers are stacked.

DESCRIPTION OF SYMBOLS 100 ... Three-dimensional modeling system 1 ... Setting data creation apparatus 2, 2 '... Three-dimensional modeling apparatus 10 ... Control means 12 ... Roller rotational speed control means 13 ... Discharge control means 20 ... Head part; 20A ... Discharge head unit; 20B ... Recovery curing head unit 21 ... model material discharge nozzle 22 ... support material discharge nozzle 23 ... nozzle row 24 ... curing means 25 ... roller section 26 ... roller body 27 ... blade 28 ... bus 29 ... suction pipe 30 ... head moving means 31 ... XY Direction driving unit 32, 32 '... Z direction driving unit 40 ... Modeling plate 43 ... X direction moving rail 44 ... Y direction moving rail 45 ... Rail guide 61 ... Input means 62 ... Display means 63 ... Parameter setting means 64 ... Calculation means 65 ... Adjusting means 66 ... Output means MA ... Model material SA ... Support material ES ... Hollow part PC ... Computer SB ... Over Width DN ... discharge width P1 ... preceding the boundary of the entire discharge nozzle width DR ... roller portion in the width D2 ... support material discharge nozzle of the ring supporting portion D1 ... model material discharge nozzle; P2 ... next boundary R1, R2 ... region

Claims (18)

As a modeling material on the modeling plate (40),
Model material (MA) that will be the final model,
Supporting the projecting portion where the model material (MA) projects, and the support material (SA) finally removed,
By repeating the operation of ejecting while curing in at least one direction and curing this, slices having a predetermined thickness in the height direction are generated in layers, and the slices are stacked in the height direction. A three-dimensional modeling apparatus for modeling by
The modeling plate (40) for placing the modeled object;
Modeling in which a plurality of model material discharge nozzles (21) for discharging the model material (MA) and a plurality of support material discharge nozzles (22) for discharging the support material (SA) are arranged in one direction, respectively. Material discharge means;
The model material (MA) or the support material (SA) is supported in a rotatable manner and is pressed while rotating from the upper surface in a state where the model material (MA) or the support material (SA) is flowable, and the excess of the model material (MA) or the support material (SA). Roller part (25) for scraping off,
A head part (20) comprising the modeling material discharge means and the roller part (25);
Horizontal driving means for reciprocating the head portion (20) in the horizontal direction;
Vertical driving means for moving the relative position in the height direction of the head portion (20) and the modeling plate (40);
The horizontal driving means is driven, and the modeling material for one slice is discharged and cured by the modeling material discharging means, and then the vertical driving means is driven to move the discharge position onto the cured slice. Further, a control means (10) for controlling to sequentially stack the slices by discharging and curing the modeling material for the slice of the next layer,
For the three-dimensional data of the modeled object, the model material (MA) or the slice containing the support material (SA) located on the outermost surface of the modeled object, or the model material positioned at the interface of the different type of modeled material where the type of the modeled material is switched In the slice located more than the slice containing (MA) or the support material (SA), the model material (MA) or the support material (SA) contained in the slice is not discharged or the discharge amount is reduced. Hollow part generating means for generating a hollow part (ES),
With
When the modeling material discharge unit includes the hollow part (ES) generated by the hollow part generation unit in a slice to be modeled, the modeling material is not discharged or discharged to a position corresponding to the hollow part (ES). A three-dimensional modeling apparatus characterized by modeling the slice by reducing the amount. The three-dimensional modeling apparatus according to claim 1, further comprising:
Equipped with a discharge data storage means for storing discharge data recording a discharge pattern for each slice constituting the modeled object,
When the control means (10) includes the hollow part (ES) generated by the hollow part generating means in a slice to be formed in accordance with the discharge data stored in the discharge data storage means, the hollow part ( ES) to form the slice by controlling to not discharge the modeling material from the modeling material discharge means to the position corresponding to ES) or to reduce the discharge amount,
The modeling material so that the modeling material discharged to the position corresponding to the hollow part (ES) is not scraped off by the roller part (25) during modeling of the slice located at the outermost surface or the heterogeneous modeling material interface A three-dimensional modeling apparatus characterized by controlling a discharge means. The three-dimensional modeling apparatus according to claim 1,
When modeling each slice by the modeling material discharge unit, the hollow part generation unit determines whether it is necessary to form a hollow part (ES) in the slice,
When the hollow part (ES) is included, the control unit does not discharge the modeling material from the modeling material discharging unit at a position corresponding to the hollow part (ES) generated by the hollow part generating unit or A three-dimensional modeling apparatus characterized by controlling the discharge amount to be reduced. As a modeling material on the modeling plate (40),
Model material (MA) that will be the final model,
Supporting the projecting portion where the model material (MA) projects, and the support material (SA) finally removed,
By repeating the operation of ejecting while curing in at least one direction and curing this, slices having a predetermined thickness in the height direction are generated in layers, and the slices are stacked in the height direction. A three-dimensional modeling apparatus for modeling by
The modeling plate (40) for placing the modeled object;
Modeling in which a plurality of model material discharge nozzles (21) for discharging the model material (MA) and a plurality of support material discharge nozzles (22) for discharging the support material (SA) are arranged in one direction, respectively. Material discharge means;
The model material (MA) or the support material (SA) is supported in a rotatable manner and is pressed while rotating from the upper surface in a state where the model material (MA) or the support material (SA) is flowable, and the excess of the model material (MA) or the support material (SA). Roller part (25) for scraping off,
A head part (20) comprising the modeling material discharge means and the roller part (25);
Horizontal driving means for reciprocating the head portion (20) in the horizontal direction;
Vertical driving means for moving the relative position in the height direction of the head portion (20) and the modeling plate (40);
The horizontal driving means is driven, and the modeling material for one slice is discharged and cured by the modeling material discharging means, and then the vertical driving means is driven to move the discharge position onto the cured slice. Further, a control means (10) for controlling to sequentially stack the slices by discharging and curing the modeling material for the slice of the next layer,
Slice containing the model material (MA) or support material (SA) located on the outermost surface of the modeled object, or the model material (MA) or support material (SA) located at the heterogeneous modeling material interface where the type of modeling material is switched In the slice located one layer or more lower than the slice including the model material (MA) or the support material (SA) included in the slice is not discharged, or the modeling material discharge unit is controlled so as to reduce the discharge amount Discharge control means (13) to perform,
A three-dimensional modeling apparatus comprising: A three-dimensional modeling apparatus according to claim 4,
The discharge control means (13) is the model material (MA) or support material (SA) located on the outermost surface of the modeled object, or the model material (MA) located at the heterogeneous modeling material interface where the type of modeling material is switched. Alternatively, the three-dimensional modeling apparatus is characterized in that the modeling material ejection unit is controlled so that the model material (MA) or the support material (SA) is not ejected only at a portion directly below the support material (SA). A three-dimensional modeling apparatus according to claim 4 or 5,
The discharge control means (13) is a hollow part (ES) containing a model material (MA) or a support material (SA) that does not discharge,
Even if the model material (MA) or the support material (SA) is ejected by the modeling material ejection means and stacked, the number of slices from the hollow portion (ES) to the outermost surface or the heterogeneous modeling material interface. Alternatively, the model material (MA) or the support material (SA) included in the slice of the heterogeneous modeling material interface is positioned below the outermost surface or the heterogeneous modeling material interface so as not to contact the roller portion (25). A three-dimensional modeling apparatus characterized by this. A three-dimensional modeling apparatus according to claim 6,
The three-dimensional modeling apparatus, wherein the discharge control means (13) has the hollow portion (ES) positioned 1 to 10 slices below from the outermost surface or the interface of different types of modeling material. A three-dimensional modeling apparatus according to any one of claims 4 to 7,
The discharge control means (13) is configured so that the position of the hollow portion (ES) including either the model material (MA) or the support material (SA) that does not discharge is n slices below the outermost surface or the heterogeneous modeling material interface. and when,
The upper surface for one slice of the hollow part (ES) is either the model material (MA) or the support material (SA),
The top surface for n slices of the hollow part (ES) is either model material (MA) or support material (SA), and the top surface for (n + 1) slices of the hollow part (ES) is blank, model A three-dimensional modeling apparatus characterized by being set to n satisfying all of the other conditions of the material (MA) and the support material (SA). A three-dimensional modeling apparatus according to any one of claims 4 to 8,
The three-dimensional modeling apparatus characterized in that the thickness of one layer of the hollow part (ES) is thicker than the thickness of the surplus resin recovered by the roller part (25). The three-dimensional modeling apparatus according to any one of claims 1 to 9, further comprising:
A curing means (24) for curing the model material (MA) and the support material (SA),
The control means (10) reciprocally scans the head portion (20) in one direction with the horizontal driving means,
At least one of the forward and backward paths of the reciprocating scanning, the modeling material discharging means discharges one of the model material (MA) or the support material (SA) onto the modeling plate (40),
At least one of the return path and the forward path of the reciprocating scanning, the excess of one of the model material (MA) or the support material (SA) in a flowable state is collected by the roller portion (25),
By curing one of the model material (MA) or the support material (SA) by the curing means (24) in at least one of the forward path and the return path of the reciprocating scanning,
Further, at least one of the return path or the forward path of the reciprocating scanning, the modeling material discharging means discharges the other of the model material (MA) or the support material (SA) onto the modeling plate (40),
At least one of the forward path and the return path of the reciprocating scanning, the other surplus part of the model material (MA) or the support material (SA) in a flowable state is collected by the roller portion (25),
By curing the other of the model material (MA) or the support material (SA) by the curing means (24) in at least one of the return path and the forward path of the reciprocating scan,
The slice is generated, and the vertical driving means is used to move the relative position of the modeling plate (40) and the head unit (20) in the height direction, and control to execute modeling by repeating the stacking of the slices. A three-dimensional modeling apparatus characterized by A three-dimensional modeling apparatus according to claim 10,
In the line where the model material (MA) and the support material (SA) are positioned in the scanning direction of the modeled object, the model material (MA) and the support material (SA) are not discharged at the same time in the same reciprocating scan. A three-dimensional modeling apparatus characterized by discharging and curing only one of the modeling materials. A three-dimensional modeling apparatus according to any one of claims 1 to 9,
In the line where the model material (MA) and the support material (SA) are positioned in the scanning direction of the modeled object, the model material (MA) and the support material (SA) are discharged or cured in the same reciprocating scan. A three-dimensional modeling apparatus characterized by being made. A three-dimensional modeling apparatus according to any one of claims 4 to 12,
The three-dimensional modeling apparatus, wherein the molding control unit (13) controls the modeling material ejection unit so as not to eject the model material (MA) as a hollow portion (ES). A three-dimensional modeling apparatus according to any one of claims 4 to 12,
A three-dimensional modeling apparatus, wherein the modeling material ejection unit is controlled so that the ejection control unit (13) does not eject the support material (SA) as the hollow portion (ES). On the modeling plate (40) for placing the modeled object, as a modeling material,
Model material (MA) that will be the final model,
Supporting the projecting portion where the model material (MA) projects, and the support material (SA) finally removed,
The horizontal drive means is discharged while scanning the modeling material discharge means in at least one direction, and this is cured, and the vertical drive means is repeatedly moved in the height direction to repeat the operation. A three-dimensional modeling method in which modeling is performed by stacking the slices in the height direction while generating slices having a predetermined thickness in the direction,
A step of discharging either the modeling material (MA) or the supporting material (SA) on the modeling plate (40) by a modeling material discharging means for discharging the modeling material;
A step of recovering one of the discharged modeling materials while rotating at a predetermined speed with a roller portion (25) rotatably supported to recover the surplus of the modeling material in a flowable state;
Curing the flowable modeling material from which the surplus is recovered; and
Moving the relative position in the height direction of the modeling material discharge unit and the modeling plate (40) by the vertical driving unit;
While repeating the discharge of the modeling material by the modeling material discharge means, the recovery of the excess of the modeling material by the roller part (25), the curing of the modeling material, and the movement in the height direction by the vertical drive means,
Slice containing the model material (MA) or support material (SA) located on the outermost surface of the modeled object, or the model material (MA) or support material (SA) located at the heterogeneous modeling material interface where the type of modeling material is switched When modeling a slice positioned further below the slice including the model material (MA) or the support material (SA) included in the slice, the modeling material discharge means so as not to discharge or reduce the discharge amount Controlling the process,
3D modeling method characterized by including. On the modeling plate (40) for placing the modeled object, as a modeling material,
Model material (MA) that will be the final model,
Supporting the projecting portion where the model material (MA) projects, and the support material (SA) finally removed,
The horizontal drive means is discharged while scanning the modeling material discharge means in at least one direction, and this is cured, and the vertical drive means is repeatedly moved in the height direction to repeat the operation. A setting data creation device for a three-dimensional modeling apparatus that performs modeling by stacking the slices in the height direction while generating a slice having a predetermined thickness in the direction,
Input means (61) for acquiring three-dimensional data of the model;
Slice containing the model material (MA) or support material (SA) located on the outermost surface of the modeled object, or the model material (MA) or support material (SA) located at the heterogeneous modeling material interface where the type of modeling material is switched In the slice located more than the slice including the above, the model material (MA) or the support material (SA) included in the slice is not discharged or the hollow portion (ES) in which the discharge amount is reduced is generated Hollow part generating means;
A setting data creation device for a three-dimensional modeling apparatus. On the modeling plate (40) for placing the modeled object, as a modeling material,
Model material (MA) that will be the final model,
Supporting the projecting portion where the model material (MA) projects, and the support material (SA) finally removed,
The horizontal drive means is discharged while scanning the modeling material discharge means in at least one direction, and this is cured, and the vertical drive means is repeatedly moved in the height direction to repeat the operation. A setting data creation program for a three-dimensional modeling apparatus that performs modeling by stacking the slices in the height direction while generating slices having a predetermined thickness in the direction,
An input function to obtain the 3D data of the object;
Slice containing the model material (MA) or support material (SA) located on the outermost surface of the modeled object, or the model material (MA) or support material (SA) located at the heterogeneous modeling material interface where the type of modeling material is switched A hollow portion (ES) is generated so that the model material (MA) or the support material (SA) contained in the slice is not discharged or the discharge amount is reduced in a slice positioned further below the slice including A hollow portion generating function,
A setting data creation device for a three-dimensional modeling apparatus, characterized in that a computer is realized.   A computer-readable recording medium storing the program according to claim 17.

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