JP2018122586A - Production method of molding and molding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method of a molding further properly by controlling molding weight, etc., and a molding apparatus thereof.SOLUTION: The production method of a molding is a method of producing a three-dimensional molding 50 by laminating layers of a molding material, in which a weight of at least a part of the molding 50 is set to a set weight which is a weight different from a filling weight resulted in a case of being formed from a lamination material which is a material used for laminating, and at least a part of the molding with a set weight having been set is formed in accordance with the set weight by forming in a manner that a void 204 which is a region not being formed with the lamination material is formed therein.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a modeled object and a modeling apparatus.

  2. Description of the Related Art Conventionally, a modeling apparatus (3D printer) that models a modeled object using an inkjet head is known (see, for example, Patent Document 1). In such a modeling apparatus, for example, a modeled object is modeled by the layered modeling method by stacking a plurality of ink layers formed by an inkjet head.

JP, 2015-71282, A

  When modeling a modeling object with a modeling apparatus, the weight of a modeling object is decided according to the specific gravity of the lamination material which is the material laminated | stacked at the time of modeling, and the magnitude | size of a modeling object. However, depending on the usage of the modeled object, it may be desired to make the modeled object heavier or lighter. Further, depending on the shape of the modeled object, for example, if modeling is simply performed, the weight balance may be lost. In such a case, it may be desirable to adjust the center of gravity of the modeled object. Therefore, conventionally, it has been desired to manufacture a shaped article by a more appropriate method. Then, this invention aims at providing the manufacturing method and modeling apparatus of a molded article which can solve said subject.

  The inventor of the present application considered adjusting the weight, the center of gravity, and the like by forming a void (cavity) inside the modeled object instead of forming the modeled object as it is. If comprised in this way, the weight of a molded article, a gravity center, etc. can be formed appropriately, for example, without affecting the external appearance of a molded article. Further, through further earnest research, the inventors have found characteristics necessary for obtaining such an effect and have reached the present invention.

  In order to solve the above-mentioned problem, the present invention is a method for manufacturing a three-dimensional model by stacking layers of modeling materials, and is about the weight of at least a part of the model Set at a set weight that is different from the weight at the time of filling, which is the weight when filled with a laminate material that is a material used for lamination, and at least one of the shaped objects in which the set weight is set The part is formed according to the set weight by forming in a state having a void which is an area not formed of the laminated material.

  If comprised in this way, it can adjust to a desired weight appropriately about the weight of a molded article, for example. Further, in this case, for example, it is possible to adjust the center of gravity of the modeled object by adjusting the position where the void is formed in the modeled object. Therefore, if comprised in this way, it can be brought closer to a desired state, for example about the weight and the gravity center of a molded article. Thereby, for example, a model can be manufactured more appropriately.

  In this configuration, when setting the set weight, for example, a center of gravity instruction, which is an instruction for specifying the direction of the center of gravity of the modeled object, may be further received from the operator. In this case, for example, it is preferable to set the direction of the center of gravity of the modeled object based on the center of gravity instruction. Setting the direction of the center of gravity of the modeled object means, for example, modeling the modeled object such that the direction of the center of gravity of the modeled object is as indicated by the center of gravity instruction.

  Further, in this configuration, for example, it is conceivable to form a shaped article with a plurality of voids inside. If comprised in this way, the weight and gravity center of a molded article can be formed more appropriately, for example. In addition, for example, a substance having a specific gravity different from that of the laminated material may be placed inside the void. In this case, for example, a substance having a specific gravity greater than that of the laminated material can be considered. Further, depending on the setting weight and the setting of the center of gravity, for example, a substance having a specific gravity smaller than that of the laminated material may be put into the gap.

  Further, in order to reduce the weight of the modeled object, for example, the gap may be formed to be empty. In this case, the empty space means that, for example, the empty space becomes empty when the modeling of the modeled object is completed. In this case, the time when the modeling of the modeled object is completed is, for example, the time when all the processes related to modeling of the modeled object are completed. In addition, the empty space means that only surrounding air or the like enters the space without intentionally filling with other substances.

  In addition, when a plurality of voids are formed in the modeled object, the materials or the like to be inserted into the voids may be different for each void. Further, a substance having a specific gravity different from that of the laminated material may be put in only some of the voids, and the other voids may be emptied. If comprised in this way, the weight and gravity center of a molded article can be adjusted more finely by the combination of a several space | gap, for example. In this case, for example, it is preferable to form a plurality of voids having the same shape. If comprised in this way, the operation | movement of modeling can be prevented appropriately by making the operation | movement which forms a space | gap common, for example.

  In addition, regarding the configuration of the modeled object, for example, it is conceivable that a weight is put in the gap and the weight is moved in the gap depending on the direction of the modeled object. If comprised in this way, the gravity center of a molded article can be changed according to the direction of a molded article. In addition, for example, it becomes possible to form more various shaped objects.

  In addition, when another substance is placed inside the gap when forming the gap, for example, it is conceivable to further laminate a laminated material on the substance. Moreover, when forming the space | gap which empties an inside, for example, closing the opening part of a space | gap with the cover prepared beforehand, and forming a laminated material on it etc. can be considered.

  In addition, when forming a void that empties the interior, for example, it may be possible to form the void in a state where the interior is filled with a filling material such as a fluid material. In this case, after laminating the laminated material on the filling material, the filling material is removed through holes or the like formed in advance. In this case, for example, as a hole for removing the filling material, it is conceivable to form a through hole that connects the inside of the gap and the outside of the modeled object.

  In this case, it is preferable to use, for example, a fluid material having a specific gravity higher than that of the laminated material as the filling material. If comprised in this way, the layer of a laminated material can be appropriately formed on the filling material, for example. In this case, for example, by using a fluid material as the filling material, the filling material can be appropriately removed after the layer of the laminated material is formed. Further, depending on the quality required of the modeled object, for example, it may be possible to leave a fluid material in the interior of the modeled object even after the modeled object is completed. As such a fluid material, for example, water, saturated hydrocarbon (paraffinic, naphthenic, etc.), mineral oil, glycerin, or a mixture thereof can be considered. Moreover, practically, as the fluid material, water or a liquid containing water as a main component can be suitably used.

  Moreover, when using such a fluid material, in order to store the fluid material which overflowed during modeling operation | movement, forming a wall part on a modeling stand etc. is also considered. In this case, the modeling table is, for example, a table-shaped member on which a modeled object being modeled is placed on the upper surface. More specifically, in this case, for example, when modeling a modeled object, it may be possible to further form a wall portion surrounding the modeled object being modeled on the model table with a gap therebetween. If comprised in this way, when a fluid material overflows from the space | gap of a molded article, for example, a fluid material can be appropriately stored between the molded article and a wall part during modeling.

  In addition, as a modeling method performed using a fluid material, for example, it is conceivable to use a liquid storage container or the like disposed at a position facing the head portion with the modeling table interposed therebetween. In this case, a head part is the structure which discharges the material of modeling, for example. In this case, for example, it is conceivable to immerse the modeling object under modeling in the liquid in the liquid storage container together with the modeling table during at least a part of the modeling object. Also when comprised in this way, when a fluid material overflows from the inside of a space | gap, the said fluid material can be appropriately stored in a liquid storage container. In this case, the liquid in the liquid storage container may be used as a fluid support material for supporting the modeled object outside the modeled object, for example.

  Further, as a configuration of the present invention, it is conceivable to use a modeling apparatus having the same characteristics as described above. In this case, for example, the same effect as described above can be obtained.

  According to the present invention, for example, a modeled object can be manufactured more appropriately by adjusting the weight or the like of the modeled object.

It is a figure showing an example of modeling system 10 which performs a manufacturing method of a model concerning one embodiment of the present invention. FIG. 1A shows an example of the configuration of the modeling system 10. 1B and 1C show an example of the configuration of the main part of the modeling apparatus 12. It is a figure which explains in more detail about the molded article 50. FIG. Fig.2 (a) shows an example of a structure of the molded article 50 manufactured by the conventional method. FIG.2 (b) shows an example of a structure of the molded article 50 modeled in this example. FIG. 2C shows an example of the shape of the gap formed in this example. It is a figure explaining the operation | movement which sets the weight and gravity center of the molded article. FIG. 3A is a functional block diagram illustrating functions of the modeling system 10. FIG. 3B is a diagram illustrating an example of setting the center of gravity performed in this example. It is a figure which shows the modification of a structure of the molded article 50. FIG. Fig.4 (a) shows an example of a structure of the molded article 50 used as a lure. FIG. 4B is a diagram for explaining in more detail the operation of modeling the modeled object 50 shown in FIG. FIG. 4C is a perspective view showing the frame body 70 and the weight 72 installed in the modeled object 50 in more detail. It is a figure explaining the further modification of the molded article. Fig.5 (a) shows an example of a structure of the molded article 50 in this modification. FIG.5 (b) shows the other example of the structure of the molded article 50 in this modification. It is a figure which shows the modification of a structure of the modeling apparatus 12. FIG. It is a figure which shows the further modification of the structure of the molded article. Fig.7 (a) shows the example of a structure of the cross section orthogonal to a subscanning direction about the molded article 50 in this modification. FIG.7 (b) is sectional drawing which shows the molded article 50 in the middle of modeling. It is a figure which shows the further modification of the operation | movement of modeling which models the modeling object. It is a figure explaining the further modification of the structure of the modeling apparatus. Fig.9 (a) shows an example of a structure of the modeling apparatus 12 in this modification. FIG. 9B shows an example of the configuration of the head unit 102 in the modeling apparatus 12. FIG.9 (c) shows an example of a structure of the molded article 50 modeled in this modification. It is a figure explaining the further modification of the operation | movement of modeling and the structure of the modeling apparatus 12. FIG. Fig.10 (a) shows an example of a structure of the modeling apparatus 12 in this modification. FIGS. 10B and 10C show an example of the relationship between the necessity of the support layer 52 in the solid state and the shape of the modeled object 50. FIG.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. FIG. 1 shows an example of a modeling system 10 that executes a manufacturing method of a model according to an embodiment of the present invention. FIG. 1A shows an example of the configuration of the modeling system 10. In this example, the modeling system 10 is a modeling system (three-dimensional modeling system) that models a three-dimensional modeled object, and includes a modeling device 12 and a control PC 14.

  The modeling apparatus 12 is an apparatus that manufactures a three-dimensional modeled object by stacking layers of modeling materials, receives data indicating the modeled object from the control PC 14, and models the modeled object based on this data. More specifically, in this example, the modeling apparatus 12 receives data (weight / centroid set data) in which the weight and the center of gravity are set for the model to be modeled, and the model is modeled according to this data. I do.

  Further, as will be described in more detail later, in this example, the modeling apparatus 12 models a modeled object having a plurality of voids (cavities) therein, for example, according to the setting of the weight and the center of gravity. Further, as necessary, the weight and the center of gravity of the modeled object are adjusted by filling at least a part of the gaps with the filler. The setting of the weight and the center of gravity of the modeled object will be described in more detail later.

  The control PC 14 is a computer (host PC) that controls the operation of the modeling apparatus 12. In this example, the control PC 14 generates weight / centroid set data based on three-dimensional data indicating a modeled object in a general-purpose data format or the like, for example. In this case, for setting the weight and the center of gravity, for example, an instruction is received from an operator (operator) of the modeling system 10, and based on this instruction, weight / center of gravity set data is generated. Then, by sending the generated weight / centroid set data to the modeling apparatus 12, the modeling apparatus 12 is caused to execute the modeling operation.

  As described above, in this example, the modeling system 10 includes the modeling apparatus 12 and the control PC 14 that are a plurality of apparatuses. However, in the modification of the modeling system 10, the modeling system 10 may be configured by a single device. In this case, for example, the modeling system 10 may be configured by a single modeling apparatus 12 including the function of the control PC 14.

  Subsequently, a specific configuration of the modeling apparatus 12 will be described. 1B and 1C show an example of the configuration of the main part of the modeling apparatus 12. 1B and 1C schematically illustrate an example of the operation of the main part of the modeling apparatus 12 at different timings during the modeling operation. Moreover, in this example, the modeling apparatus 12 is an apparatus which models the modeling object 50 by the layered modeling method using an inkjet head, and is divided into a modeling part, a filling part, and a filler selection part as shown in the figure. ing. The additive manufacturing method is, for example, a method of forming the formed object 50 by stacking a plurality of layers. The modeled object 50 is, for example, a three-dimensional three-dimensional structure.

  In addition, among the units of the modeling apparatus 12, the modeling unit is a part that performs an operation of laminating modeling materials. In addition, the filling portion is a portion that performs an operation of filling the gap formed in the molded article 50 with the filler. The filler selection unit is a part that performs an operation of selecting a filler to be filled in the gap. Further, as a specific configuration for executing the operation in each of these units, in this example, the modeling apparatus 12 includes a head unit 102, a modeling table 104, a scanning drive unit 106, a tray 108, a suction unit 110, a guide bar. 112 and a control unit 120.

  Except for the points described below, the modeling apparatus 12 may have the same or similar configuration as a known modeling apparatus. More specifically, except for the points described below, the modeling apparatus 12 is the same as a known modeling apparatus that performs modeling by, for example, discharging a droplet that is a material of the modeled object 50 using an inkjet head, or You may have the same structure. In addition to the illustrated configuration, the modeling apparatus 12 may further include various configurations necessary for modeling the modeled object 50, for example.

  The head part 102 is a part that discharges the material of the shaped object 50. In this example, ink is used as the material of the model 50. In this case, the ink is, for example, a liquid ejected from an inkjet head. More specifically, in the present example, the head unit 102 includes a plurality of inkjet heads. Moreover, these several inkjet heads discharge the ink hardened | cured according to predetermined conditions as a material of the molded article 50. FIG. The head unit 102 further includes an ultraviolet light source that generates ultraviolet rays, and the ink is cured by irradiating the ink after landing with ultraviolet rays. Moreover, by this, each layer which comprises the molded article 50 is accumulated and formed, and a molded article is modeled by the layered modeling method. Further, in this example, ultraviolet curable ink (UV ink) that is cured from a liquid state by irradiation with ultraviolet rays is used as the ink.

  The head unit 102 further discharges the material of the support layer 52 in addition to the material of the modeled object 50. Thereby, the modeling apparatus 12 forms the support layer 52 around the modeled object 50 as necessary. The support layer 52 is, for example, a laminated structure that supports the modeled object 50 by surrounding the outer periphery of the modeled object 50 being modeled. The support layer 52 is formed as necessary during modeling of the modeled object 50, and is removed after the modeling process performed in the modeling apparatus 12 is completed (after completion of the stacking operation). Moreover, in FIG.1 (b), (c), the modeling object 50 under modeling is illustrated collectively with the support layer 52 for convenience of illustration.

  In addition, in this example, the ink used as a material of the molded article 50 is an example of a laminated material that is a material used for lamination. In this case, the ink used as the material of the model 50 is, for example, ink other than the material of the support layer 52. In this example, the head unit 102 further includes, for example, a flattening unit that flattens the ink layer before the ink is cured. As the flattening means, for example, a roller for flattening the ink layer by scraping off a part of the ink before curing can be suitably used.

  Moreover, as the modeling object 50 to model in this example, the modeling apparatus 12 may model the modeling object 50 with which the surface was colored, for example. In this case, the head unit 102 includes, for example, an inkjet head for ink of each color of basic colors (process colors) for color expression. In this case, the head unit 102 preferably further includes, for example, a light-reflective ink (for example, white ink) used for forming a light-reflective region, an inkjet head for colorless and transparent clear ink, and the like. . In this case, the light reflective region is formed inside the colored region on the surface of the molded article 50. The head unit 102 may further include, for example, an ink jet head for ink dedicated to modeling used for forming the inside of the modeled object 50.

  The modeling table 104 is a trapezoidal member that supports the modeled object 50 being modeled, and places the modeled object 50 being modeled on the upper surface. Further, at the time of forming the ink layer, the modeling table 104 supports the modeled object 50 so as to face the head unit 102 in the modeling unit of the modeling apparatus 12 as shown in FIG. Further, in this example, the modeling table 104 has a configuration in which at least the upper surface can move in the stacking direction (Z direction in the figure), and is driven by the scanning drive unit 106 to model the model 50. At least the upper surface is moved in accordance with the progress of. In this case, the lamination direction is, for example, a direction in which modeling materials are laminated in the additive manufacturing method. More specifically, in this example, the stacking direction is a direction orthogonal to the main scanning direction (Y direction in the drawing) and the sub-scanning direction (X direction in the drawing).

  Further, in this example, the modeling table 104 is also movable in a direction in a plane orthogonal to the stacking direction. For example, at the timing of filling the gap in the model 50 with the filler, for example, FIG. As shown in FIG. 4, the head moves away from the position facing the head portion 102 and moves to the filling portion. Thereby, the modeling object 50 is made to oppose the adsorption | suction unit 110 in a filling part.

  The scanning drive unit 106 is a drive unit that causes the head unit 102 to perform a scanning operation that moves relative to the modeled object 50 being modeled. In this case, to move relative to the modeled object 50 being modeled is to move relative to the modeling table 104, for example. Further, to cause the head unit 102 to perform the scanning operation is, for example, to cause the inkjet head included in the head unit 102 to perform the scanning operation. In this example, the scan driving unit 106 causes the head unit 102 to perform a main scanning operation (Y scanning), a sub-scanning operation (X scanning), and a stacking direction scanning (Z scanning).

  The main scanning operation is, for example, an operation for ejecting ink while moving in the main scanning direction. The sub-scanning operation is, for example, an operation that moves relative to the modeling table 104 in the sub-scanning direction orthogonal to the main scanning direction. The stacking direction scanning is, for example, an operation of moving the head unit 102 in the stacking direction relative to the model 50. The modeling table 104 causes the head unit 102 to perform these scanning operations by moving at least one of the head unit 102 or the modeling table 104.

  In this example, the scanning drive unit 106 further moves the modeling table 104, the suction unit 110, and the like when performing an operation of filling a filler in the space of the modeled object 50. More specifically, when performing the operation of filling the filler in the gap, the scanning drive unit 106, for example, as shown in FIG. The fillers 62a, b) inside are adsorbed. And after adsorption | suction, as shown in FIG.1 (c), the adsorption | suction unit 110 of the state holding the filler is moved to a filling part. Further, in accordance with the movement of the suction unit 110, the scanning drive unit 106 further moves the modeling table 104 supporting the modeled object 50 being modeled to the filling unit. Thereby, the modeled object 50 and the suction unit 110 are opposed to each other in the filling portion. And the position of the filler currently hold | maintained at the adsorption | suction unit 110 with respect to the space | gap currently formed in the molded article 50 is stopped, and the adsorption | suction of the filler etc. by the adsorption | suction unit 110 is stopped, and a filler is in a space | gap Is installed.

  In addition, for example, when a space that is not filled with a filler is formed in the molded article 50, the scanning drive unit 106 causes the suction unit 110 to suck the lid 60 instead of the filler. And the lid | cover 60 is installed in the filling part so that the opening part of a space | gap may be plugged up (covered). In this case, the opening of the gap is an opening that opens upward in the stacking direction.

  The tray 108 is a holding unit that holds the lid 60, the fillers 62a and 62b, and the like in the filler selection unit. In this case, the lid 60 is a member for closing the opening of the void in the modeled object 50 as necessary, as described above. Further, the fillers 62 a and 62 b are members that are put into the voids in the modeled object 50. In this example, the tray 108 holds a filler having a specific gravity different from that of each ink of the material of the model 50 as the fillers 62a and 62b. In this case, the specific gravity of the filler is different from that of each ink, for example, in that the weight of the filler is different from the case where an object having the same shape as the filler is formed with each ink.

  In this example, fillers having different weights are used as the plural kinds of fillers 62a and 62b. In this case, for example, it is conceivable to use a filler having a specific gravity smaller than that of each ink as one of the plurality of kinds of fillers 62a and 62b and to use a filler having a specific gravity larger than that of each ink as the other. If comprised in this way, more various adjustment etc. can be appropriately performed about the weight and specific gravity of the molded article 50, for example.

  1B and 1C, the shapes of the fillers 62a and 62b are simplified and illustrated in a rectangular parallelepiped shape for convenience of illustration. However, the shape of the fillers 62a and 62b is preferably a shape that matches the shape of the gap, for example. The shape of the voids will be described in more detail later.

  The adsorption unit 110 is configured to adsorb and move the lid 60 and the fillers 62a and 62b held on the tray 108. In this example, as described above, the adsorption unit 110 adsorbs the lid 60 and the fillers 62a and 62b held on the tray 108 in the filler selection unit and moves them to the filling unit. Further, in the filling portion, the lid 60 is installed on the upper part of the gap in the shaped article 50 and the fillers 62a and 62b are installed in the gap.

  Further, in this example, the suction unit 110 moves along the guide bar 112 by being driven by the scanning drive unit 106. The guide bar 112 is a bar-like member that guides the movement of the suction unit 110. In this example, the guide bar 112 extends in the sub-scanning direction, and guides the movement of the suction unit 110 in the sub-scanning direction.

  The control unit 120 is, for example, a CPU of the modeling apparatus 12, and controls the modeling operation of the modeled object 50 by controlling each unit of the modeling apparatus 12. In this example, the control unit 120 forms a plurality of voids in the modeled object 50 based on the weight / centroid set data received from the control PC 14. Moreover, a filler is installed in at least some of the gaps as necessary. Thereby, the control unit 120 causes the modeling apparatus 12 to model the modeled object 50 with the weight and the center of gravity adjusted. In this case, modeling the model 50 with the weight and the center of gravity adjusted is based on, for example, the setting of the weight and the center of gravity received from the operator of the modeling system 10 and the model 50 with no gap formed therein. Modeling the model 50 in a state where the weight and the center of gravity are different. According to this example, for example, the weight of the model can be adjusted and the model can be more appropriately manufactured.

  In the above description, the configuration of the modeling apparatus 12 has been mainly described in the case where the lid 60 and the fillers 62a and 62b are automatically installed by the suction unit 110. In this case, in the middle of the modeling operation, the operation of laminating the ink layer in the modeling unit is temporarily stopped at the timing when the gap is formed. Then, the lid 60 and the fillers 62a and 62b are installed in the filling unit. In addition, after installing the lid 60 and the like, the operation of laminating the ink layer is continued in the modeling unit. In the modification of the configuration of the modeling apparatus 12, for example, the lid 60 and the fillers 62a and 62b may be installed manually by an operator. In this case, for example, the operation of laminating the ink layers may be interrupted as appropriate, and the lid 60 and the fillers 62a and 62b may be installed.

  Subsequently, the model 50 manufactured in this example will be described in more detail. FIG. 2 is a diagram for explaining the modeled object 50 in more detail. Fig.2 (a) is a figure which shows an example of a structure of the molded article 50 manufactured with the conventional method, and shows an example of a structure of the cross section orthogonal to a subscanning direction about the molded article 50 in a simplified manner.

  When manufacturing the modeling object 50 with a modeling apparatus, it is possible to model the modeling object 50 of various shapes like the bird-shaped modeling object 50 shown in the figure, for example. In this case, for example, when modeling of the modeled object 50 is simply performed, the modeled object 50 generally becomes the model unit 202 as shown in the drawing. In this case, the model part 202 in the modeled object 50 is a part formed in the modeled object 50 with ink of a modeling material. The model unit 202 can also be considered as, for example, a region that remains as a material (modeling material) used for modeling.

  However, when the modeled object 50 is modeled in this way, depending on the shape of the modeled object 50, the center of gravity may be biased, and the modeled object 50 may fall when installed in its original posture. In this case, the installation of the modeled object 50 in the original posture is expressed by the modeled object 50, for example, when the modeled object 50 is installed in a posture in which a bird stands when modeling the modeled object 50 in the shape of a bird. It is to install the modeled object 50 in the original posture of the target to be performed.

  Further, for the problem of the center of gravity, for example, as shown in the figure, it is conceivable to adjust the balance of the entire modeled object 50 by forming a pedestal at the lowermost part of the modeled object 50. However, also in this case, if there is an unbalanced part in a part other than the base, the modeled object 50 may be easily broken. More specifically, for example, when the bird-shaped shaped object 50 is formed as shown in the figure, the bird's leg portion is a thin portion, so it is easily broken due to the weight of the portion above the leg portion. It can be considered.

  In addition to the problem of the center of gravity, for example, the weight itself of the model 50 may be a problem. For example, as shown in FIG. 2A, when the modeled object 50 is modeled by the conventional method, the weight of the modeled object 50 is determined by the specific gravity of the ink used for modeling and the size of the modeled object 50. In this case, when the size of the shaped object 50 increases, the weight increases accordingly. However, depending on the use of the modeled object 50, it may be possible to make the modeled object 50 heavier or lighter.

  On the other hand, in the present example, as described above, a plurality of voids are formed in the shaped object 50, and at least a part of the voids is filled with a filler as necessary, thereby forming the shaped object. 50 weight and center of gravity are adjusted. FIG. 2B is a diagram illustrating an example of a configuration of a modeled object 50 to be modeled in this example, and illustrates an example of a configuration of a cross section orthogonal to the sub-scanning direction for an example of the modeled object 50. FIG. 2C shows an example of the shape of the gap formed in this example.

  As described above, in this example, the modeling apparatus 12 (see FIG. 1) models the modeled object 50 having a plurality of voids therein. In this case, the void is a portion other than the model portion 202 inside the modeled object 50. More specifically, in this example, a plurality of types of gaps 204 a to 204 d are formed inside the modeled object 50. Among these, the gaps 204a to 204c are gaps formed inside the main body portion of the modeled article 50, and are formed in the same shape. In this case, the main body part in the modeled object 50 is a part obtained by removing an additional part such as a base from the entire modeled object 50. Moreover, the shape with the same space | gap is that the shape of the wall surface (side surface) surrounding a space | gap is the same, for example.

  Moreover, as shown in a figure, in this example, the shape is being fixed to the same about all the voids formed in the main-body part of the molded article 50. FIG. If comprised in this way, the operation | movement of modeling can be prevented appropriately by making the operation | movement which forms a space | gap common, for example. In this case, for example, the design operation for generating the weight / centroid set data can be further simplified. In addition, by forming a large number of small gaps whose shapes are fixed, for example, it is possible to more finely adjust the weight and the center of gravity of the modeled object 50. In addition, for example, a filler having a certain shape can be used in common as the filler that fills the gap. Furthermore, as in the case of using the modeling apparatus 12 of this example, when automatically performing the installation of the lid on the gap, the installation of the filler in the gap, etc., by making the shape of the gap the same, Control can also be made easier.

  Moreover, in this example, the space | gap in the molded article 50 is formed without using a support layer. Therefore, the gap is formed in such a shape that the side surfaces do not overhang in the stacking direction, as shown as gap 204 in FIG. In this case, the shape not overhanging means that the angle θ shown in the figure is about 90 ° or less.

  Moreover, in this example, the weight of the position of each space | gap is mutually varied by making the state inside space | gap 204a-c differ mutually. Further, as shown in the figure, a plurality of voids are formed as each of the voids 204a to 204c. If comprised in this way, it can adjust appropriately about the weight and gravity center of the molded article 50, for example.

  More specifically, among the gaps 204a to 204c, the gap 204a is a gap that becomes empty. In this case, that the gap is empty means that the gap is empty at least in a state where all the processes related to the modeling of the model 50 are completed. In addition, the empty space means that only surrounding air or the like enters the space without intentionally filling with other substances. By forming such an empty space 204a in the modeled object 50, for example, the weight of the modeled object 50 can be reduced.

Moreover, the ultraviolet curable ink used as the material of the modeled object 50 in the layered modeling method has a specific gravity of, for example, about 1 to 1.2 in the state of a resin after curing. Therefore, when the empty space | gap 204a is formed, the molded article 50 can be reduced in weight in the ratio of about 1-1.2g (gram) per 1 cm < ³ > volume. In this case, for example, it is possible to adjust the center of gravity of the modeled object 50 by forming an empty gap 204 a inside a part of the modeled object 50.

  Here, when a void is formed inside the molded article 50, it is necessary to further laminate an ink layer on the void. Therefore, in this example, when the empty gap 204a is formed, as described above, the lid 60 is used to close the opening of the gap 204a. In this case, after the gap 204 a is formed, the opening of the gap 204 a is closed with the lid 60, and ink is further laminated on the lid 60. If comprised in this way, the empty space | gap 204a can be appropriately formed in the inside of the molded article 50, for example. For the gap 204a, for example, a gap in which only the lid 60 is installed and no filler is installed can be considered.

  The gaps 204b and c are gaps that are filled with a filler. Among these, the gap 204b is a gap in which a light filler having a specific gravity smaller than that of the ink used for forming the model portion 202 is installed. In this example, the filler installed in the gap 204b is, for example, one of the fillers 62a and 62b (see FIG. 1). By forming such a gap 204b, a part of the model 50 can be reduced in weight while being heavier than when forming the empty gap 204a.

  The gap 204c is a gap in which a heavy filler having a specific gravity larger than that of the ink used for forming the model portion 202 is installed. In this example, the filler installed in the gap 204c is, for example, the other filler of the fillers 62a and 62b. By forming such a gap 204c, it is possible to make part of the modeled object 50 heavier than when the model unit 202 is used.

In addition, as a filler installed in the space | gap 204c, using the filler formed, for example with the metal etc. can be considered. More specifically, for example, it is conceivable to use a filler formed of steel having a specific gravity of about 7 to 8. In this case, the modeling object 50 can be weighted at a rate of about 6 to 7 g (grams) per 1 cm ³ volume by installing a filler in the gap 204 c. Further, as the filler for the gap 204c, for example, a filler formed of aluminum having a specific gravity of about 2.7 may be used. In this case, by placing a filler in the gap 204c, the shaped article 50 can be weighted at a rate of about 1.5 to 1.7 g (grams) per 1 cm ³ volume. Further, as the filler for the gap 204c, for example, a filler formed of SUS (stainless steel) may be used.

  Further, as shown in the figure, in this example, as the filler for the gaps 204b and c, a filler having a shape corresponding to the gaps 204b and c is used. In this case, for the gaps 204b and c, an ink layer can be formed on the gaps 204b and c, for example, without installing the lid 60. Therefore, in this example, the openings are closed without using the lid 60 by forming an ink layer on the filler for the gaps 204b and c.

  Further, among the gaps formed in the modeled article 50, the gap 204 d is a gap formed inside a part formed as a pedestal of the modeled article 50. In this case, the pedestal of the modeled object 50 is a part that supports the entire modeled object 50 at the lowest part in the direction of gravity when the modeled object 50 is installed in a predetermined direction, for example. In this case, in order to stably support the modeled object 50, it is preferable to form the pedestal part sufficiently heavy. If comprised in this way, horizontal stability can be improved appropriately by making the gravity center of the whole molded article 50 low, for example.

  Further, it is sufficient to increase the weight of the pedestal portion, and fine adjustment or the like is not necessary. Therefore, in this example, the gap 204d has a larger gap by being different in shape from the other gaps 204a to 204c. Further, a heavy filler having a large specific gravity is installed in the gap 204d, for example, similarly to the gap 204c.

  As the filler to be installed in the gap 204d, a larger filler having a different shape from that for the gaps 204b and c may be used in accordance with the shape of the gap. In this case, the tray 108 (see FIG. 1) in the modeling apparatus 12 further holds, for example, a filler for the gap 204d. Moreover, about the big filler for the space | gap 204d, you may install manually by the operator, for example during the operation | movement of modeling. For the gap 204d, for example, a plurality of fillers having the same shape as those for the gaps 204b and c may be arranged side by side.

  By forming the gaps 204a to 204d as described above, for example, the weight and the center of gravity of the modeled object 50 can be appropriately changed. Moreover, the weight and the center of gravity of the modeled object 50 can be appropriately adjusted by changing these numbers and distribution.

  More specifically, in the illustrated case, the modeled object 50 is divided into four regions A to D in order from the bottom in the weight direction, the lower part is weighted, and the upper part is reduced in weight. For example, the region A including the pedestal and the lowermost portion of the main body is formed to have a specific gravity of, for example, about 2 to 6 by forming the gaps 204c and d. In addition, the region B above the region A is formed so as to have a specific gravity of about 1 to 1.2, for example, with the specific gravity of the model portion 202 as it is by not forming a gap. In addition, the region C above the region B is formed so as to have a specific gravity of, for example, about 0.2 to 0.6 by forming the gap 204b. Further, the upper region C is formed so as to have a specific gravity of, for example, about 0.1 to 0.4 by forming the gap 204a. If comprised in this way, the modeled object 50 with a low center of gravity can be modeled appropriately.

  Here, in FIG.2 (b), about the weight and center of gravity of the molded article 50, the case where the lower part is simply weighted and the upper part is reduced is illustrated. However, the weight and the center of gravity of the modeled object 50 may be set in more detail according to the object to be expressed by the modeled object 50. More specifically, for example, when three-dimensional data (original data) indicating the modeled object 50 is created by, for example, photographing with a 3D scanner, the weight of the modeled object 50 is measured by the 3D scanner. It is conceivable to perform modeling according to the situation. In this case, for example, if the modeling is performed by reducing or enlarging the measurement result, it is conceivable that the modeling is performed by scaling the weight in accordance with the magnification. Further, regarding the center of gravity, it is conceivable to set the center of gravity of the modeled object 50 in accordance with the object to be measured.

  Further, when the original data is created by, for example, CAD, it is conceivable to assume a preferable weight or center of gravity based on the specific gravity or volume of the original material to be expressed by the modeled object 50. Also in this case, if the modeling is performed by reducing or enlarging, it is conceivable that the modeling is performed by changing the weight according to the magnification. As for the center of gravity, it is conceivable to set the center of gravity of the modeled object 50 in accordance with the center of gravity assumed as described above.

  Moreover, about modeling operation | movement of the molded article 50 in this example, for example, it forms in the state which has the above space | gap 204a-d inside at least one part of the molded article 50, and is set to the preset set weight. It is also possible to consider the matching operation. In this case, the set weight is, for example, a weight set for at least a part of the shaped article 50. Further, the set weight is set to a weight different from, for example, the weight at the time of filling, which is the weight when formed without forming a void. Further, in this case, by forming the empty gap 204a or the gaps 204b and c in which the filler having a specific gravity different from that of the model part 202 is formed, each part of the modeled object 50 is adjusted according to the set weight. Perform modeling.

  Further, in this example, by forming a gap in the modeled object 50, for example, it is possible to save ink used for modeling. More specifically, for example, when the model 50 is modeled without forming a void, an internal region that is less important than the vicinity of the surface in appearance is also formed with an expensive material (ink). On the other hand, when forming a space | gap in the molded article 50, the usage-amount of an ink can be reduced appropriately by emptying the space | gap inside, for example. Also, when filling the gap with a filler, for example, a material having a lower cost than ink can be used. Therefore, according to the present example, it is possible to reduce the manufacturing cost of the model 50.

  Next, the operation for setting the weight and the center of gravity of the modeled object 50 will be described in more detail. FIG. 3 is a diagram for explaining the operation of setting the weight and the center of gravity of the model 50. FIG. 3A is a functional block diagram illustrating functions of the modeling system 10. FIG. 3B is a diagram illustrating an example of setting the center of gravity performed in this example.

  FIG. 3A is a diagram schematically illustrating various functions of the modeling system 10 related to the operation of setting the weight and the center of gravity of the modeled object 50. Therefore, each block does not necessarily correspond to a physical configuration (for example, an electronic circuit unit). Moreover, the block which shows modeling among each block shown to Fig.3 (a) has shown the function of the modeling apparatus 12 (refer FIG. 1), for example. Moreover, the block which shows functions other than modeling has shown the function of control PC14 (refer FIG. 1), for example. Moreover, in the modification of the structure of the modeling system 10, you may perform with the modeling apparatus 12 about at least one part function other than modeling.

  As described above with reference to FIG. 1, in this example, the control PC 14 generates weight / centroid set data based on the three-dimensional data indicating the model 50 to be modeled by the modeling apparatus 12. In this case, the control PC 14 inputs the three-dimensional data that is the original data for modeling by, for example, operating the CAD software or receiving the three-dimensional data from a client server or the like. The control PC 14 calculates the weight of the modeled object 50 when modeling is performed with the original data based on the input three-dimensional data (original data) (original data weight calculation).

  In this example, the control PC 14 further receives an instruction for setting the weight and the center of gravity of the modeled object 50 from the operator. More specifically, in this case, the operator sets a desired weight for the weight of the modeled object 50 (weight setting). In this case, the final desired weight is the final weight of the modeled object 50 (the total weight of the modeled object 50) when the modeling is completed.

  Further, the operator further sets the direction of the center of gravity desired finally for the center of gravity of the modeled object 50 (center of gravity setting). In this case, the direction of the desired center of gravity is the direction of the center of gravity that matches the direction in which the model 50 is installed after the modeling is completed. More specifically, for setting the center of gravity, for example, any of the XYZ directions including the sub-scanning direction (X direction), the main scanning direction (Y direction), and the stacking direction (Z direction). This is done by selecting the end of the side. That is, in this case, one of the six directions + X, −X, + Y, −Y, + Z, and −Z is selected. In this case, for example, -Z is selected when the model 50 is modeled in the direction with the sign A in FIG. 3B, and + Y is selected when the model 50 is modeled with the sign B. Will choose.

  Further, after the weight and the center of gravity are set by the operator, the control PC 14 calculates the difference between the weight corresponding to the original data and the set weight (set weight) (difference between the original data weight and the set weight). Calculation). And based on this calculation result, the calculation and control for adding a space | gap and a filler in the molded article 50 are performed, and the weight / centroid setting completed data supplied to the modeling apparatus 12 are produced | generated (data control).

  More specifically, in this case, the control PC 14 selects, for example, the shape and number of voids necessary to eliminate the difference based on the calculated weight difference (gap shape / number selection). In this case, for example, the shape and number of the air gaps are selected by reading out and using the air gap shape from the air gap shape memory that stores a plurality of types of air gap shapes prepared in advance. Further, for each of the gaps, the necessity of installing the filler and the selection of the type of filler used when installing (filling) the filler are performed (filler selection). This also assigns a filler to each gap. Further, in this case, the weight and shape of the filler are read out from the filler weight memory storing the weight and shape of each type for a plurality of types of fillers prepared in advance, and used. Make assignments. In this example, the filler shape memory further stores the shape of the lid that covers the opening of the gap to be emptied. Then, the gaps to be emptied are assigned with lids based on the lid shape read from the filler shape memory.

  In addition, after the shape and number of the gaps and the filler to be used are determined and the weight of the modeled object 50 is adjusted to the set weight, the direction of the center of gravity can be adjusted by, for example, adjusting or selecting the position where the gap is formed. Adjust the center of gravity adjustment position. In this case, according to the direction of the center of gravity set by the operator, the space for inserting the heavy filler is arranged in the direction of the center of gravity, and the space for inserting the light filler is arranged in the direction opposite to the direction of the center of gravity. Adjust the direction of.

  Then, after adjusting the weight and the center of gravity as described above, weight / center-of-gravity set data in which the gap and the filler are set according to the adjusted state is generated. Then, the generated data is output to the modeling apparatus 12 (weight / centroid set data output). This also causes the modeling apparatus 12 to model the modeled object 50 with the weight and the center of gravity adjusted (modeling). According to this example, for example, the model 50 can be manufactured more appropriately by adjusting the weight and the center of gravity of the model 50.

  Here, in the above, one example was concretely demonstrated about the operation | movement which sets the weight and gravity center of the molded article 50. FIG. However, the specific operation for setting the weight and the center of gravity is not limited to the operation described above, and may be variously changed. For example, the weight setting operation for setting the weight can be more generalized, for example, an operation for setting a desired set weight with respect to at least a part of the modeled object 50. The operation for setting the center of gravity can be considered as an operation for receiving a center of gravity instruction, which is an instruction for designating the direction of the center of gravity of the model 50, from the user, for example.

  In the above description, the operation when the control PC 14 automatically performs the adjustment of the weight and the center of gravity has been described. However, in a modified example of the operation of the modeling system 10, for example, it is conceivable to manually adjust the weight and the center of gravity by the operation of the operator. In this case, for example, it is conceivable that the operator adjusts the weight and the center of gravity of the modeled object 50 by determining the number and shape of the voids, the filler to be used, the position of the voids, and the like.

  Subsequently, a modified example of the modeled object 50 to be modeled by the modeling system 10 and a modified example of the modeling operation by the modeling system 10 will be described. FIG. 4 shows a modification of the configuration of the modeled object 50. Except as described below, in FIG. 4, the configuration denoted by the same reference numeral as in FIGS. 1 to 3 may have the same or similar features as the configuration in FIGS.

  In the above description, in the case where the void is not left empty, the configuration in which the filler having a shape corresponding to the shape of the void is mainly installed in the void has been described. However, in a modified example of the configuration of the modeled object 50, for example, an object smaller than the size of the gap may be installed in the gap. In this case, for example, it is conceivable to install a substance so that the object can move in the gap.

  More specifically, FIG. 4 shows an example of the configuration of the modeled object 50 in the case of modeling the lure used for fishing as the modeled object 50. Fig.4 (a) shows an example of a structure of the molded article 50 used as a lure. Moreover, in Fig.4 (a), the mode of the space | gap 204 formed in the molded article 50 is transparently illustrated using the broken line for convenience of illustration.

  As shown in the figure, in this modification, the resin portion that becomes the main body of the lure is formed by laminating layers of ink, and an object smaller than the size of the gap 204 is formed in the gap 204 formed therein. A weight 72 of a certain metal sphere is inserted. Further, in order to make the movement of the weight 72 within the gap 204 as the movement space of the weight 72 easier, a hollow frame 70 is installed in the gap 204, and the weight 72 is put therein. As the frame 70, for example, a frame formed of a metal thin plate (for example, a SUS thin plate) or the like can be suitably used. Further, as shown in the figure, a plurality of weights 72 are placed in the frame body 70.

  When configured in this manner, the weight 72 in the gap 204 moves in the gap 204 in accordance with the orientation of the modeled object 50 in a state after completion of modeling (when using a lure or the like). In this case, as the weight 72 moves, the center of gravity of the shaped object 50 moves (varies). More specifically, when using the modeled object 50 which is a lure, a road thread is connected to the head of the lure as shown in the figure. In this case, when the road thread is pulled, the lure body moves forward (head direction), but due to inertia, the weight 72 inside the lure moves (remains) backward (tail direction). As a result, the center of gravity is rearward and the tail of the lure is lowered. When the pulling of the thread is stopped, the lure body stops due to water resistance, but the weight moves forward (head direction) due to inertia. As a result, the center of gravity is forward and the head is lowered. If such an operation is repeated, the lure can pitch (up and down) and invite the fish.

  FIG. 4B is a diagram for explaining in more detail the operation of modeling the model 50 shown in FIG. 4A, and is a cross-section corresponding to the portion indicated by the alternate long and short dash line in FIG. The structure of the cross section AA) is shown. FIG. 4C is a perspective view showing the frame body 70 and the weight 72 installed in the modeled object 50 in more detail.

  When modeling the modeled object 50 as in this modification, the frame body 70 and the weight 72 are placed in the gap 204 during the operation of laminating the ink layers, and an ink layer is further formed thereon. . More specifically, in this case, for example, as shown in FIG. 4B, the stacking operation is temporarily performed at the timing when the ink layers are stacked until the model portion 202 is formed around the area to be the gap 204. After stopping, the frame body 70 and the weight 72 are installed in the gap 204. Then, after the installation, the lamination of the ink layers is resumed, and the model portion 202 is further formed on the frame body 70 in the lamination direction. If comprised in this way, the modeling thing 50 from which the position of a gravity center changes can be modeled appropriately. Thereby, for example, various modeled objects 50 can be modeled more appropriately.

  Next, a modified example of the configuration of the empty gap 204 and how to form the gap 204 will be described. FIG. 5 is a diagram for explaining a further modification of the modeled object 50. In the case of forming the empty gap 204 without using the lid 60 (see FIG. 1), the configuration of the gap 204 and the formation of the gap 204 are illustrated. An example of how to do this. Fig.5 (a) shows an example of a structure of the molded article 50 in this modification. FIG.5 (b) shows the other example of the structure of the molded article 50 in this modification.

  Except as described below, in FIG. 5, the configuration denoted by the same reference numerals as in FIGS. 1 to 4 may have the same or similar features as the configurations in FIGS. 5A and 5B, FIG. 5A is a diagram illustrating the configuration of the model 50 in a simplified manner, and a cross section orthogonal to the sub-scanning direction of an example of the model 50. An example of the configuration is shown. FIG. 5B is a diagram illustrating the configuration of the modeled object 50 including a more detailed portion than that in FIG. 5A, and the shape and the like are different from the modeled object 50 illustrated in FIG. An example of a cross-sectional configuration orthogonal to the main scanning direction and a cross-sectional configuration orthogonal to the stacking direction of the gourd-shaped shaped object 50 is shown. Further, in FIG. 5, only the empty gap 204 is illustrated as the gap 204 in the modeled object 50 for convenience of illustration. However, in a further modification of the configuration of the modeled object 50, for example, the gap 204 in which a filler is installed may be further formed, as in the modeled object 50 illustrated in FIG.

  In this modification, the empty gap 204 is formed without using a lid or the like that closes the opening of the gap 204. In this case, a filling material that is a substance different from the ink used as the laminated material is used, and the space 204 is temporarily filled with the filling material during the modeling operation, and then the filling material is removed. Thus, an empty gap 204 is formed without using a lid. More specifically, in this case, in the operation of modeling the molded article 50 including the gap 204 inside by laminating the ink layers, for example, the operation of the lamination is interrupted and the filling material is filled in the gap 204. Thus, the gap 204 is formed in a state where the inside is filled with the filling material. Ink is further laminated on the filling material in the gap 204. Further, these operations are repeated as necessary. Then, by removing the filling material in the gap 204 until the shaped article 50 is completed, the shaped article 50 is formed so that the gap 204 becomes empty.

  Further, in this case, although not shown in FIG. 5A, a hole that connects the inside of the gap 204 and the outside of the object 50, such as the filler discharge hole 212 in FIG. 5B, for example. Is preferably formed. In this case, the holes such as the filler discharge holes 212 are through holes that penetrate the model portion 202 from the surface of the model 50 and reach the inside of the gap 204. If comprised in this way, a filling material can be removed appropriately through holes, such as the filler discharge hole 212, for example.

  In this case, as the filling material, for example, a fluid material that can be removed from the holes is preferably used. In this case, the fluid material is a substance that maintains fluidity even at the timing when modeling is completed, unlike, for example, ink used for forming the model portion 202. In addition, the fluid material can be considered as, for example, a substance that maintains fluidity in the gap 204. More specifically, in the present modification, the fluid material is a substance that exists in a liquid state in the gap 204. In this case, at the time of laminating the ink layer on the gap 204, the ink layer is laminated on the fluid material in a state where the gap 204 is filled with the fluid material. If comprised in this way, the space | gap 204 which becomes empty after removal of a fluid material can be formed appropriately.

  Here, in order to more appropriately remove the filling material such as the flowable material, in addition to the hole used as the filler discharge hole 212, as shown in FIG. 5B, the hole used as the air injection hole 210 is formed. Further formation is preferred. The air injection hole 210 is a through hole that connects the outside of the shaped article 50 and the inside of the gap 204 at a position different from the filler discharge hole 212. In such a configuration, when removing the filling material from the gap 204, the filling material can be removed more easily and appropriately by feeding air through the air injection hole 210 with a pump or the like, for example. Further, the removal of the filling material may be performed by, for example, sucking the filler discharge hole 212 side with a syringe or the like. Also in this case, the filling material can be removed more easily and appropriately by allowing air to enter from the outside of the shaped article 50 through the air injection hole 210. In addition, when removing the filling material, for example, both of sending air from the air injection hole 210 using a pump or the like and suctioning using a syringe or the like on the filler discharge hole 212 side are used in combination. Also good.

  In addition, the air injection hole 210 and the filler discharge hole 212 are preferably formed so as not to be conspicuous on the surface of the molded article 50. In this case, it is preferable to use a small hole having a minimum size. The air injection hole 210 and the filler discharge hole 212 may be formed at the time of laminating the ink layers, for example, like the gap 204, or may be formed by a drill or the like after the lamination operation is completed.

  In addition, as for the holes used for removing the filling material, two or more holes are formed in the entire modeled object 50, such as the air injection hole 210 and the filler discharge hole 212 in FIG. It is preferable. Further, in this case, as shown in FIGS. 5A and 5B, the number of holes formed by the shaped article 50 can be reduced by connecting the plurality of gaps 204 by contacting the adjacent gaps 204. It can be reduced appropriately. In this case, that the plurality of gaps 204 are connected is, for example, that the filling material can flow between the plurality of gaps 204. Further, in this case, it is preferable to form the empty gap 204 formed in the model 50 so that all the gaps 204 are connected.

  Further, when a fluid material is used as the filling material, it is necessary to use a material that does not sink ink when the ink layer is formed on the fluid material. Therefore, as the fluid material, for example, it is preferable to use a substance having a specific gravity larger than the specific gravity (for example, about 1.1) of the ink constituting the model unit 202. More specifically, as such a fluid material, for example, a fluorine-based inert liquid, hydrofluoroether, or fluorocarbons may be used.

  In addition, the fluid material used as the filling material is preferably a material that does not cause a chemical reaction or the like by contact with the ink constituting the surrounding model portion 202, for example. In this case, the phrase “not causing a chemical reaction or the like by contact with ink” means, for example, not performing a chemical attack (reaction) on the ink. Further, as the filling material, for example, it is preferable to use a substance that can be appropriately extracted using a syringe or the like at the time of removal from a hole such as the filler discharge hole 212. In consideration of the modeling cost of the modeled object 50, the fluid material is preferably a substance that can be reused by, for example, collecting after use and filtering.

  As for the flowable material, even if a liquid having a small specific gravity is used, any material having a sufficiently high viscosity can be used as a filling material. In this case, for example, if the ink discharged to the overhanging portion such as the upper part of the flowable material has a viscosity capable of curing the ink before sinking into the flowable material, the flowable material The ink layer on top can be properly laminated. Therefore, such a substance can be used as a filling material. More specifically, as such a fluid material, for example, water, saturated hydrocarbon (paraffinic, naphthenic, etc.), mineral oil, glycerin, or a mixture thereof can be considered. Further, as will be described in more detail later, practically, for example, water or the like can be suitably used as the fluid material.

  As described above, according to the present modification, for example, the empty gap 204 can be appropriately formed inside the molded article 50. Thereby, for example, the weight of the modeled object 50 can be appropriately reduced. Further, for example, it is possible to appropriately adjust the weight and the center of gravity of the modeled object 50. In this case, for example, the amount of ink used for the model unit 202 can be reduced. Thereby, for example, the manufacturing cost of the modeled object 50 can be appropriately reduced.

  In this modification, the gap 204 can be formed without using a lid or the like that closes the opening of the gap 204. In this case, it is not necessary to match the shape of the gap 204 with the shape of the lid. Therefore, according to the present modification, for example, it is possible to form the gap 204 having various shapes in accordance with the shape of the model 50 or the like. Thereby, when modeling the modeling object 50 of various shapes, the empty space | gap 204 can be formed more appropriately inside.

  In this case as well, the wall surface surrounding the gap 204 is preferably formed in a shape that does not overhang at an angle of less than 90 degrees with respect to the surface of the ink to be stacked. If comprised in this way, about the operation | movement which forms the space | gap 204, it can perform more easily and appropriately. Moreover, about the position which forms the space | gap 204 in the molded article 50, it is possible to determine according to direction to the set weight or gravity center, etc. similarly to the case where it demonstrated using FIGS. . In this case, in order to make the model 50 stable (lower center of gravity), it is preferable not to form the gap 204 at a position (low position) that is below the gravitational direction when the model 50 is installed. .

  In addition, the filling of the filling material (fluid material) into the gap 204 performed at the time of modeling the model 50 may be performed automatically (automatic) by an apparatus, for example, or may be performed manually (manually by an operator's operation). ). Moreover, when performing filling with an automatic type | mold, it is possible to form the molded article 50 using the modeling apparatus 12 which has the function to fill with the filling material.

  FIG. 6 is a diagram illustrating a modification of the configuration of the modeling apparatus 12 and illustrates an example of the configuration of the modeling apparatus 12 having a function of filling a filling material. In addition, except the point demonstrated below, the structure which attached | subjected the same code | symbol as FIGS. 1-5 in FIG. 6 may have the same or similar characteristic as the structure in FIGS. For example, except for the points described below, the modeling apparatus 12 illustrated in FIG. 6 may have the same or similar features as the modeling apparatus 12 illustrated in FIG. 1, for example. Moreover, the modeling apparatus 12 shown in FIG. 6 may further include the same or similar components as the modeling apparatus 12 of FIG. 1 in addition to the configuration shown in the figure.

  In this modification, the modeling apparatus 12 includes a filling unit 130 and a guide bar 132 as a configuration for filling a filling material (fluid material) in addition to the head portion 102 and the like used for forming an ink layer. The filling unit 130 is a discharge device that discharges a filling material by a function of, for example, an inkjet head or a dispenser, and includes a discharge nozzle 302 or a blade 304. The discharge nozzle 302 is a discharge port for discharging a filling material, and discharges, for example, a filling material in a liquid state in an amount necessary for filling the gap 204 into each gap 204 (see FIG. 5).

  The blade 304 is a member for removing excess filler material after filling the gap 204 with the filler material. In this modification, the blade 304 is a soft silicone rubber blade that does not damage the upper surface of at least the laminated ink layer. By performing a squeegee operation at the position of the opening of the gap 204, the gap 204 Remove excess filling material overflowing from. More specifically, in the illustrated configuration, the blade 304 is a four-bladed rotating blade using four silicon rubber blades. In this case, for example, the squeegee operation is performed by moving the modeling table 104 to the left in the drawing parallel to the sub-scanning direction while rotating the blade 304 CCW (counterclockwise).

  Note that the step of squeegee using the blade 304 may be omitted if the filling amount can be precisely controlled when filling the filling material. Also, in this case, the required degree of precision is, for example, the ratio of the amount removed when the ink used for modeling is leveled (the leveling removal rate of the modeling material), the thickness of one ink layer, and the gap It depends on the volume of 204 and the like. The guide bar 132 is a guide member that guides the movement of the filling unit 130 in the main scanning direction. By moving the filling unit 130 along the guide bar 132, the filling material can be appropriately filled into the gaps 204 formed at various positions in the modeled object 50.

  In this modification, the filling material is filled by temporarily interrupting the lamination of the ink layers. More specifically, in this case, during the modeling operation performed by the head unit 102 in the modeling unit in the modeling apparatus 12, for example, at the timing when the formation of one gap 204 ends, a signal indicating the end of the formation of the gap 204 (gap Generation end signal) is generated. Then, the operation of laminating ink is temporarily stopped based on the gap formation end signal, and the modeling table 104 is moved from the modeling unit to the filling unit. In the filling unit, the filling material is discharged from the discharge nozzle 302 of the filling unit 130 to automatically fill the gap 204 with the filling material. With this configuration, for example, the filling material can be appropriately filled before the overhanging ink layer is formed on the gap 204.

  After filling the gap 204, the modeling table 104 is returned to the modeling portion, and an ink layer is further formed on the filling material in the gap 204. In this case, the ink ejected from the inkjet head in the head unit 102 flies in a direction corresponding to the lower side of the drawing in parallel with the Z direction, and is landed (attached) on the filling material in the gap 204. In this case, an ink layer can be appropriately formed on the gap 204 by irradiating ultraviolet rays immediately after landing to cure the ink.

  Further, in this case, for example, after forming all the ink layers constituting the modeled object 50, the empty material 204 is formed in the modeled object 50 by removing the filling material in the gap 204. If comprised in this way, the modeling thing 50 which has the empty space | gap 204 inside can be appropriately modeled, for example, performing filling of the filling material automatically.

  Here, at the time of filling the filling material, the upper surface (liquid surface) of the filling material in the gap 204 is in contrast to the upper surface of the laminated layer at the time of suspension, which is the upper surface of the ink layer formed before filling. It is preferable to perform filling so as not to exceed the upper surface of the laminated layer at the time of temporary stop. If comprised in this way, it can prevent appropriately that the excess filling material overflows the space | gap 204 etc. Further, in this case, for example, it is conceivable to perform filling while detecting the position of the upper surface of the filling material with an optical sensor or the like, and to stop filling at a timing when the upper surface of the laminated layer is temporarily stopped. If comprised in this way, the filling material can be more appropriately filled with high accuracy.

  In this case, even if the filling material is not necessarily filled up to the same height as the upper surface of the laminated layer at the time of suspension, if the filling material is filled to a position sufficiently close to the upper surface of the laminated layer at the time of temporary suspension, The ink layer can be appropriately formed. For this reason, when the filling of the filling material is completed, the position of the upper surface of the filling material may be lower than the upper surface of the stacked layer at the time of suspension. More specifically, for example, depending on the volume of the gap 204, the position of the upper surface of the filling material at the time when filling is completed, for example, if the difference from the upper surface of the stacked layer at the time of pause is within about 1 mm. For example, it can be filled (supplemented) with the amount of ink to be removed (planarization removal amount) in the subsequent flattening of the ink layers.

  Further, the filling operation as described above in the present modification may be considered as, for example, an operation of filling the gap 204 with a filling material every time the gap 204 is formed in the modeled object 50 being shaped. it can. In this case, filling of the filling material every time the gap 204 is formed means, for example, the timing at which all the layers surrounding the gap 204 are formed when the ink layer surrounding the gap 204 is formed. The filling material is filled with.

  In a further modification, each of the gaps 204 may be filled with a filling material even at an intermediate point before one gap 204 is completed. In this case, for example, at the time of forming an ink layer surrounding the gap 204, it is conceivable to perform a filling operation each time a plurality of preset ink layers are formed. In this case, for example, a filling operation may be performed at a timing according to the shape of the gap 204. More specifically, for example, when the gap 204 surrounded by the wall surface including the overhang shape is formed, a filling operation or the like may be performed at the timing when the overhang shape of the wall surface is generated. Further, depending on the quality required for modeling, it is conceivable to perform a filling operation each time one ink layer is formed when forming an ink layer surrounding the gap 204.

  As described above, the operation of filling the gap 204 with the filling material may be performed manually. Also in this case, for example, every time one gap 204 is formed, the operation of laminating the ink layers is temporarily stopped and the filling material is filled. In this case, the temporary stop may be performed by the operator monitoring the stacking operation, or may be automatically performed by generating a gap formation end signal. In these cases, the modeling apparatus 12 has a function of temporarily stopping the stacking of the ink layers in accordance with, for example, an operator instruction or a void formation end signal. Moreover, when performing a temporary stop automatically, it is preferable to have a function which asks the operator for an operation of filling the filling material.

  When performing manual filling, the operator fills the gap 204 with a filling material using, for example, a syringe. Further, in this case, for example, it is preferable to inject a little more filling material, and then squeeze with a soft blade or the like on the upper surface of the laminated layer at the time of temporary stop to remove excess filling material. In addition, after the filling, the lamination is restarted from the temporarily stopped ink layer.

  Then, the further modification of the structure of the molded article 50 is demonstrated. FIG. 7 shows a further modification of the configuration of the shaped object 50. Fig.7 (a) shows the example of a structure of the cross section orthogonal to a subscanning direction about the molded article 50 in this modification. FIG.7 (b) is sectional drawing which shows the molded article 50 in the middle of modeling. In addition, except the point demonstrated below, the structure which attached | subjected the same code | symbol as FIGS. 1-6 in FIG. 7 may have the same or similar characteristic as the structure in FIGS.

  Also in the present modified example, the modeling object 50 having the empty gap 204 inside is formed by filling the gap 204 with a filling material such as a fluid material in the middle of shaping and then removing the filling material. Is shaped. Further, in this case, as described above with reference to FIG. 6, it is not necessary to form the gap 204 in accordance with the shape of the lid, etc., so it is possible to form the gap 204 having various shapes. become. Therefore, in this modification, only the part along the outer peripheral surface in the modeling object 50 is made into the model part 202, and the other part is made into the space | gap 204, and the modeling object 50 is modeled. In this case, as shown in the drawing, only a portion having a predetermined thickness along the surface of the model 50 becomes the model portion 202. In this case, the thickness is a thickness in a normal direction perpendicular to the surface of the model 50. Further, in this case, the entire inside of the model unit 202 along the surface of the modeled object 50 becomes the gap 204. According to this modification, for example, the weight of the model 50 can be significantly reduced. Moreover, the usage-amount of the ink used for modeling can also be reduced significantly, and the modeling cost of the molded article 50 can be suppressed appropriately.

  Moreover, when forming such a molded article 50, the wall surface surrounding the periphery of the gap 204 is inclined at various angles. More specifically, for example, when a model 50 as shown in FIG. 7 is modeled, at least a part of the wall surface surrounding the gap 204 has an overhang shape. Therefore, in this case, the filling of the filling material into the gap 204 is performed in parallel with the operation of laminating the ink layers forming the model portion 202, for example, as illustrated in FIG. 7B. It is preferable that the upper surface of the ink layer (the upper surface of the laminate) and the upper surface of the filling material to be filled (the upper surface of the filler) are always aligned. If comprised in this way, the space | gap 204 of various shapes can be formed appropriately. Also in this case, for example, the filling material once filled in the gap 204 is appropriately formed by forming the air injection hole 210 and the filler discharge hole 212 which are through-holes connecting the gap 204 and the outside of the model 50. Can be removed.

  Further, regarding the configuration of the modeled object 50, the modeling operation for modeling the modeled object 50, the configuration of the modeling apparatus 12, and the like, further modifications can be considered. For example, in the above description, the case where the filling material is removed from all the gaps 204 has been described with reference to FIGS. 6 and 7. However, in a modified example of the configuration of the modeled object 50, for example, it may be possible to leave some of the gaps 204 filled with the filling material without removing the filling material.

  In the above description, the case where a fluid material such as liquid is mainly used as the filling material has been described. However, it is conceivable to use materials other than liquid as the filling material. In this case, for example, it is conceivable to use a filling material that is solid at the time of filling and is liquefied or vaporized according to predetermined conditions. More specifically, for example, a substance that sublimates from a solid state to a gas state, such as dry ice, may be used as the filling material. Further, for example, when a liquid filling material is used at the time of filling, for example, the filling material may be vaporized and removed.

  Subsequently, a further modification of the modeling operation for modeling the modeled object 50 and the configuration of the modeling apparatus 12 will be described. FIG. 8 is a diagram showing a further modification of the modeling operation for modeling the modeled object 50. In the case of modeling using the modeling apparatus 12 having the same or similar configuration as that shown in FIG. The modification of the method of modeling of the thing 50 is shown. In addition, except the point demonstrated below, the structure which attached | subjected the same code | symbol as FIGS. 1-7 in FIG. 8 may have the same or similar characteristic as the structure in FIGS.

  As described above, in the modeling operation described with reference to FIG. 6, a liquid fluid material as a filling material is discharged from the filling unit 130 to fill the void of the model 50. To do. Thereby, for example, the fluid material functions as a support layer in the gap, and an overhanging ink layer is formed on the gap. And about these points, also in the case shown in FIG. 8, the modeling operation is performed in the same or similar manner. In addition, in the modified example of the modeling operation shown in FIG. 8, when the fluid material overflows from the gap due to overflow from the gap, the fluid material is prevented from greatly spreading on the modeling table 104. Therefore, a wall portion 54 is further formed on the modeling table 104. Thereby, when the fluid material overflows from the gap, the fluid material is stored in the region surrounded by the wall portion 54.

  More specifically, in the present modification, for example, as shown in the figure, a wall portion 54 for holding the overflowing fluid material on the modeling table 104 is formed. About the wall part 54, it can also be considered as the structure for preventing that a fluid material flows out from the modeling stand 104, for example. Further, the wall portion 54 can be considered as a configuration for holding the overflowing fluid material. Further, in this case, for example, at the initial stage of the operation of modeling the modeled object 50, the wall part 54 surrounding the modeled object 50 being modeled is formed in parallel with the modeling of the modeled object 50 (simultaneously with the modeling of the modeled object 50). Formed on the modeling table 104. Further, in this case, the modeling object 50 and the support layer 52 are provided with a gap between the modeling object 50 and the support layer 52 so that the fluid material can be stored between the modeling object 50 and the support layer 52. A wall portion 54 is formed on the modeling table 104 so as to surround the periphery of. Surrounding the periphery of the modeled object 50 and the support layer 52 is, for example, surrounding the outside of the support layer 52 formed outside the modeled object 50.

  When configured in this way, the fluid material overflowing from the gap does not spread widely on the modeling table 104 and is stored between the modeled object 50 and the wall unit 54 in the region surrounded by the wall unit 54. It will be. Therefore, if comprised in this way, even when a fluid material overflows from a space | gap, for example, the influence on the circumference | surroundings can be suppressed appropriately. In this case, after the modeling process of the model 50 performed in the modeling apparatus 12 is completed (after completion of the stacking operation), for example, before or after the model 50 and the support layer 52 are separated from the model table 104, etc. Further, only the fluid material within the range surrounded by the wall portion 54 may be removed by sucking with a dropper or the like, and the modeling table 104 may be cleaned. Further, the removal of the fluid material may be performed by wiping with a cloth, for example. It is also conceivable to wipe off with a cloth after removing most of the fluid material with a dropper or the like. Moreover, about the wall part 54, if it breaks down after removing a fluid material, it can be removed from the modeling stand 104 easily and appropriately, for example. Therefore, according to this modification, for example, the modeling operation performed using the fluid material can be performed more appropriately.

  Here, it is preferable to perform peeling of the molded article 50 and the support layer 52 after the removal of the wall portion 54, for example. If comprised in this way, the peeling operation | work can be performed more easily, for example in the state without the surrounding extra (wall part 54). Further, the height of the wall portion 54 (height in the stacking direction) may be a height (necessary height) at which the overflowing fluid material does not leak to the outside of the wall portion 54. Therefore, the height of the wall portion 54 may be lower than that of the modeled object 50, for example, as shown in the drawing. The wall 54 may be formed of any material (ink) used for forming the support layer 52 and the modeled object 50. More specifically, for example, the wall portion 54 may be formed of ink (support material) used as a material for the support layer 52. Further, the wall portion 54 may be formed with any ink used for modeling the modeled object 50. In this case, for example, any one of modeling-dedicated ink (model material, modeling material ink), clear ink, coloring ink (decorative ink, color ink) used for forming the interior of the modeled object 50, or these It is conceivable to form using a plurality of inks. Moreover, about the wall part 54, you may form using both a support material and the ink used for modeling of the molded article 50, for example.

  In addition, as described above with reference to FIG. 6, in the case where the fluid material is filled in the void of the modeled object 50, in order to prevent the fluid material from overflowing from the void, It is conceivable to control the upper surface (liquid surface) of the flowable material so as not to exceed the upper surface of the laminate. However, depending on the quality required for modeling, it may be preferable to fill as much fluid material as possible in the gap. In such a case, when the gap is almost completely filled, the surface usually rises slightly due to the influence of the surface tension. In this case, for example, it is conceivable to discharge more fluid material than the minimum necessary amount so that the fluid material in the gap is not insufficient. In such a case, excess fluid material that exceeds the stacking surface during the stacking operation overflows from the gap due to the operation of the blade 304 in the filling unit 130 and flows out from the upper surface of the modeled object 50 being modeled. Will do. As a result, the amount of the fluid material that overflows onto the modeling table 104 during modeling may be increased. On the other hand, according to this modification, for example, even when the amount of the fluid material overflowing onto the modeling table 104 increases, the overflow fluid material can be appropriately stored in a certain region.

  In the above description, the configuration and operation in the case where the fluid material is discharged using the filling unit 130 different from the head unit 102 have been described with reference to FIGS. However, in a further modification of the configuration of the modeling apparatus 12, for example, the fluid material may be discharged by the configuration in the head unit 102.

  FIG. 9 is a diagram for explaining a further modification of the configuration of the modeling apparatus 12. Fig.9 (a) shows an example of a structure of the modeling apparatus 12 in this modification. FIG. 9B shows an example of the configuration of the head unit 102 in the modeling apparatus 12. FIG.9 (c) shows an example of a structure of the molded article 50 modeled in this modification. In addition, except the point demonstrated below, the structure which attached | subjected the same code | symbol as FIGS. 1-8 in FIG. 9 may have the same or similar characteristic as the structure in FIGS.

  As described above with reference to FIG. 6 and FIG. 8 and the like, when discharging the fluid material using the filling unit 130 (see FIG. 6), the operation of laminating the ink is temporarily stopped and the flow is stopped. It is conceivable to discharge the functional material. However, in this case, if the number of times that modeling is paused increases, the time required for modeling may increase significantly. On the other hand, in the present modification, for example, an ink layer is formed without temporarily stopping the operation of laminating the ink constituting the modeled object 50 by discharging the fluid material by the configuration in the head portion 102. The fluid material is further discharged during the main scanning operation.

  More specifically, in this modification, the modeling apparatus 12 includes a head unit 102 that can discharge a fluid material. The head unit 102 includes a carriage 400, a plurality of inkjet heads, a plurality of ultraviolet light sources 408, and a flattening roller 410. The carriage 400 is a holding member that holds each component in the head unit 102. In this example, the head unit 102 includes an inkjet head 402w, an inkjet head 402y, an inkjet head 402m, an inkjet head 402c, an inkjet head 402k, an inkjet head 402t, an inkjet head 404, and an inkjet head 406 as a plurality of inkjet heads. Have. For example, the plurality of inkjet heads are arranged side by side in the main scanning direction with their positions in the sub-scanning direction aligned.

  Among these inkjet heads, the inkjet head 402w, the inkjet head 402y, the inkjet head 402m, the inkjet head 402c, the inkjet head 402k, and the inkjet head 402t (hereinafter referred to as inkjet heads 402w to t) are An inkjet head that ejects ink used as a material, and ejects inks of different colors. More specifically, the inkjet head 402w discharges white (W color) ink. The inkjet head 402y discharges yellow (Y color) ink. The ink jet head 402m ejects magenta (M color) ink. The inkjet head 402c discharges cyan (C color) ink. The inkjet head 402k discharges black (K color) ink. The inkjet head 402t discharges clear ink. In this case, the clear ink is, for example, a clear color ink that is a colorless transparent color (T).

  Of the inkjet heads included in the head unit 102, the inkjet head 404 ejects ink used as a support material that is a material of the support layer 52. As the support material, for example, a known material for the support layer can be suitably used. Moreover, as the inkjet head 404, for example, the same or similar inkjet head as the inkjet heads 402w to 402t can be suitably used. The inkjet head 406 is an inkjet head that discharges a fluid material. The inkjet head 406 discharges the fluid material in parallel with the modeling operation during modeling of the modeled object 50, for example, by ejecting the fluid material during the main scanning operation. As the inkjet head 406, for example, an inkjet head that is the same as or similar to the inkjet heads 402w to 402t can be preferably used.

  In this modification, since the head unit 102 includes the inkjet head 406, the fluid material is discharged by the configuration in the head unit 102. Further, the head unit 102 of this modification can be considered as a configuration in which an inkjet head 406 is added to the head unit 102 in the configuration shown in FIGS.

  The plurality of ultraviolet light sources 408 are light sources (UV light sources) for curing the ink, and generate ultraviolet rays for curing the ultraviolet curable ink. Further, in the present example, each of the plurality of ultraviolet light sources 408 is disposed on one end side and the other end side in the main scanning direction of the head unit 102 so as to sandwich the arrangement of the inkjet heads therebetween. As the ultraviolet light source 408, for example, UVLED (ultraviolet LED) can be suitably used. The flattening roller 410 is a flattening unit for flattening a layer of ink formed during modeling of the modeled object 50. For example, in the main scanning operation, the flattening roller 410 is in contact with the surface of the ink layer and removes a part of the ink before curing, thereby flattening the ink layer. In the present modification, the flattening roller 410 also functions as a configuration for removing excess fluid material that exceeds the lamination surface in the gap of the shaped article 50 during the lamination operation. In this case, for example, it is conceivable to remove excess fluid material together with the ink in the operation of flattening the ink layer. Further, for example, like the blade 304 in the filling unit 130 shown in FIG.

  When constituted in this way, fluid material can be discharged as a part of the function of a modeling part, without providing a filling part etc. in addition to a modeling part which models with head part 102. FIG. Therefore, according to this modification, for example, the configuration of the modeling apparatus 12 can be further simplified and downsized. In this case, as described above, the fluid material can be filled into the voids of the modeled object 50 without temporarily stopping the operation of laminating the ink. Therefore, according to this modification, it is possible to prevent the time required for modeling from increasing due to the temporary stop. Moreover, thereby, for example, the modeling object 50 can be more efficiently modeled.

  In this case, since it is not necessary to temporarily stop modeling at the timing when the flowable material is discharged into the gap, it is possible to form the gap with a higher degree of freedom. Therefore, according to the present modification, for example, the degree of freedom of the shape and number of voids to be formed can be further increased. In this case, the discharge amount and the discharge position of the fluid material can be controlled more precisely by discharging the fluid material using the ink jet head. Thereby, for example, various shapes of gaps can be formed more appropriately.

  Further, in this case, for example, as shown in FIG. 9C, it is possible to form the gap 204 matched with the shape of the modeled object 50 with higher accuracy. More specifically, in FIG.9 (c), the left figure shows an example of the external appearance (modeled object external appearance) of the completed molded object 50. FIG. Moreover, the figure on the right side shows the state of the cross section of the shaped object 50 together with the cross section of the support layer 52. Further, the modeled object 50 shown in FIG. 9C can be considered as a modified example of the shape of the modeled object 50. Also in this case, the modeled object 50 has the model part 202 and the space | gap 204 similarly to the modeled object 50 etc. which were shown, for example in FIG. In this case, the gap 204 in the model 50 is formed using, for example, a fluid material discharged from the inkjet head 406 in the head unit 102. More specifically, in this case, when the model 50 is formed, the model part 202 and the gap 204 are formed by forming the surrounding model part 202 in a state in which the region where the gap 204 is to be formed is filled with a fluid material. The modeled object 50 is modeled. In this case, it is conceivable that the fluid material filled in the gap 204 is extracted from the modeled object 50 by the completion of all the processes related to modeling. In this case, for example, it is conceivable that a hole is formed in a part of the surface of the modeled object 50 and the fluid material is extracted through the hole. Further, depending on the use of the modeled object 50, required quality, and the like, all the processes related to modeling of the modeled object 50 may be completed with the fluid material filled in the gap 204.

  Here, in each structure demonstrated above, the support material which supports the model part 202 in a solid state is used as a material (external support material) of the external support layer 52 of the molded article 50. More specifically, as such a support material, it is conceivable to use, for example, an ultraviolet curable ink containing an ultraviolet curable resin. On the other hand, when the gap 204 is formed in the modeled object 50 using the fluid material as in each configuration described above, the fluid material filled in the gap 204 is surrounded by the surroundings in the gap 204. It can also be considered as a material (fluid support material) or the like constituting the support portion that supports the model portion 202. And when thinking in this way, about the structure which fills the fluidity | liquidity material in the space | gap 204 inside the molded article 50, for example, a fluidity material is used as a support material for the space | gap 204 inside the molded article 50, and modeling is carried out. The support material for the outside of the object 50 can be considered as a configuration using ultraviolet curable ink.

  Moreover, in the further modification of modeling operation | movement and the structure of the modeling apparatus 12, a fluid material is used also as a support material for supporting the molded article 50 (model part 202) on the outer side of the molded article 50, for example. Also good. In this case, for example, it is conceivable to model the modeled object 50 using the water tank-shaped liquid storage container 500.

  FIG. 10 is a diagram for explaining a further modification of the modeling operation and the configuration of the modeling apparatus 12. Fig.10 (a) shows an example of a structure of the modeling apparatus 12 in this modification. Except as described below, in FIG. 10, the configuration denoted by the same reference numerals as those in FIGS. 1 to 9 may have the same or similar features as the configurations in FIGS.

  In this modification, the modeling apparatus 12 further includes, for example, a liquid storage container 500 in addition to the configuration of the modeling apparatus 12 illustrated in FIG. The liquid storage container 500 is a water tank-like container that stores liquid, and includes a first liquid chamber 502, a second liquid chamber 504, a filter 506, and a pump 508. The first liquid chamber 502 is a liquid chamber for immersing the modeled object 50 being modeled in a liquid. The first liquid chamber 502 is a liquid chamber of a size that can accommodate the modeling table 104 therein, and is disposed at a position facing the head unit 102 with the modeling table 104 interposed therebetween, and the modeling object 50 being modeled is on the upper surface. The modeling object 104 is immersed together with the modeling table 104 in the liquid in the first liquid chamber 502 by accommodating the mounted modeling table 104 inside. Further, in this modification, the liquid level of the first liquid chamber 502 overflows as shown in the figure, so that the liquid level is always lower than the lower surface of the head unit 102 and at a position that matches the layered surface during modeling. Maintained. Further, the height of the liquid level (position of the liquid level) in the first liquid chamber 502 can be set by adjusting the height of the outlet where the liquid overflows, for example. Further, in this case, the modeling apparatus 12 gradually changes the position of the modeling table 104 in the stacking direction (liquid depth direction) by the stacking height in accordance with the progress of the modeling operation, and in the first liquid chamber 502 The modeling table 104 is moved to a deep position.

  The second liquid chamber 504 is a liquid chamber that stores liquid overflowing from the first liquid chamber 502 due to overflow of the first liquid chamber 502. About the position of the liquid level of the 2nd liquid chamber 504, as shown in the figure, it adjusts so that it may become lower than the position of the liquid level of the 1st liquid chamber 502, for example. In the present modification, the first liquid chamber 502 and the second liquid chamber 504 are connected via a filter 506 and a pump 508. The filter 506 is a filter that filters the liquid flowing from the second liquid chamber 504 to the first liquid chamber 502. The pump 508 is a pump that flows liquid from the second liquid chamber 504 toward the first liquid chamber 502, and feeds the liquid from the second liquid chamber 504 to the first liquid chamber 502 at least during the modeling of the modeled object 50. With this configuration, it is possible to appropriately circulate the liquid between the first liquid chamber 502 and the second liquid chamber 504 while filtering the liquid with the filter 506. In addition, the liquid in the first liquid chamber 502 is sent by sending the liquid from the second liquid chamber 504 to the first liquid chamber 502 by the pump 508 and flowing the liquid overflowing from the first liquid chamber 502 to the second liquid chamber 504. The position of the surface can be adjusted appropriately. In this case, for example, as shown in the drawing, it is preferable to adjust so that the position of the upper surface of the stack matches the position of the liquid surface of the liquid in the first liquid chamber 502. Further, by circulating the liquid in this way, for example, the liquid in the liquid storage container 500 can be appropriately reused. For example, when the liquid becomes dirty due to long-term use, it is preferable to discharge the liquid from a waste liquid port (not shown) and replace it with a new liquid.

  When configured in this way, for example, a portion that overhangs on the outer peripheral side of the molded article 50 can be appropriately supported by the liquid in the first liquid chamber 502 without forming a solid support layer. In this case, the solid support layer is, for example, a support layer formed of ultraviolet curable ink. Therefore, also in this modification, for example, various shaped objects 50 can be appropriately modeled.

  Further, as described above, when a solid support layer is formed at the time of modeling the model 50, it is necessary to remove the support layer after the modeling process performed in the modeling apparatus 12 is completed. In this case, it takes a lot of time to remove the support layer, and it may be difficult to efficiently model the model 50. In addition, the removed support layer becomes waste, which may be costly and troublesome. On the other hand, according to this modification, such a problem can be prevented appropriately. Therefore, according to this modification, for example, the modeling object 50 can be modeled efficiently and appropriately.

  Also in this case, a void can be formed inside the shaped article 50 by, for example, discharging a fluid material from the head portion 102. In this case, for example, even if the fluid material overflows from the gap, the fluid material can be stored in the first liquid chamber 502. Therefore, for example, the flowable material can be appropriately managed without forming the wall portion 54 (see FIG. 9) or the like on the modeling table 104 as described with reference to FIG.

  In this case, the liquid stored from the beginning in the first liquid chamber 502 is preferably the same liquid as the fluid material discharged from the head unit 102, for example. If comprised in this way, it can prevent appropriately that the composition of the liquid in the 1st liquid chamber 502 changes because a fluid material flows in, for example. In addition, depending on conditions required for modeling, a liquid different from the fluid material discharged from the head unit 102 may be used as the liquid stored in the first liquid chamber 502 from the beginning.

  Also in this modified example, instead of supporting the modeled object 50 only with the liquid in the first liquid chamber 502, a solid support layer 52 may be further formed. More specifically, for example, as shown in the figure, it is conceivable to form a support layer 52 in a solid state in order to support a part of the model 50. If comprised in this way, it can support more reliably using the support layer 52 in the solid state about the part etc. which it is preferable to support more reliably during modeling, for example. In this case, for example, it is conceivable to form the support layer 52 on the modeling table 104 before starting modeling of the modeled object 50 and to support a part of the modeled object 50 formed thereon.

  Further, depending on the shape of the model 50 to be modeled, it may be necessary to form the support layer 52 in a solid state. FIGS. 10B and 10C show an example of the relationship between the necessity of the support layer 52 in the solid state and the shape of the modeled object 50. FIG. Moreover, among these, FIG.10 (b) shows an example of the shape of the molded article 50 which can be modeled, without forming the support layer 52 of a solid state. FIG.10 (c) shows an example of the shape of the molded article 50 which needs to form the support layer 52 of a solid state.

  More specifically, the modeled object 50 illustrated in FIG. 10B is a modeled object 50 having a shape that continuously extends from below on the model table 104. In the case of the shaped article 50 having such a shape, the ink in the first liquid chamber 502 is supported by the liquid (liquid level) at the time of forming any ink layer constituting the shaped article 50, thereby The layer can be formed appropriately. Therefore, in this case, the modeled object 50 can be appropriately modeled without forming the solid support layer 52.

  However, when modeling the model 50 shown in FIG. 10C, there is a portion such as the portion shown as the downward convex portion 152 in the drawing, so that the shape is continuously continuous from below on the modeling table 104. Must not. And when modeling like such a discontinuous modeling object 50, it is thought that modeling cannot be performed appropriately only by supporting the layer of ink under modeling with liquid. More specifically, in this case, the portion of the ink layer being formed that is included in the lower protrusion 152 is formed on the modeling table 104 in a state of being separated from other portions that are continuously connected from below. In this case, simply forming an ink layer on the liquid does not determine the position of the portion included in the lower convex portion 152, and there is a possibility that it floats on the liquid and flows to an unintended position. Therefore, in such a case, for example, as shown in the drawing, it is preferable to form a solid support layer 52 and connect it to a portion included in the lower convex portion 152. If comprised in this way, it can prevent appropriately that the part contained in the downward convex part 152 flows to the position which is not intended, for example. In addition, for example, it is possible to more appropriately model a modeled object 50 having various shapes.

  Then, further supplementary explanation etc. are performed regarding the operation | movement etc. which form a space | gap in the molded article 50 using a fluid material. In the above description, as an example of a substance used as a fluid material, for example, use of water, saturated hydrocarbon (paraffinic, naphthenic, etc.), mineral oil, glycerin, or a mixture thereof has been described. However, substances other than these may be used as the fluid material as long as the functions necessary for the fluid material used for modeling are satisfied.

  Further, in this case, for the function necessary as the fluid material, for example, it is conceivable that the ink can be appropriately cured when the ink used for modeling the model 50 is ejected onto the fluid material. For this purpose, for example, when ink droplets are ejected onto the flowable material, the ink falls (sediments) into the flowable material within the time necessary to cure the ink. It is necessary that no alteration occurs. More specifically, as the fluid material, for example, (a) a substance having a specific gravity close to or heavy, or (b) a substance having a high viscosity and taking a long time for ink to sink may be used. It is done. As a material corresponding to (a), it is conceivable to use, for example, a paraffinic solvent. It is also conceivable to use fluorine-based inert liquids such as hydrofluoroethers and fluorocarbons. Moreover, as a material applicable to (b), it is possible to use glycerol, the liquid mixture of glycerol and water, etc., for example.

  Note that when considering only the function of supporting the ink layer formed thereon, the higher the viscosity, the less the sinking of the ink, so that the function as a filler for filling the gap is good. I can say that. However, in this case, when the sample 50 is finally extracted from the modeled object 50, the extraction may be difficult. Therefore, it is preferable to adjust the viscosity of the fluid material to an appropriate viscosity in consideration of the extraction operation and the like. Further, when the fluid material is discharged from the ink jet head, the discharge becomes difficult if the viscosity is high. Therefore, in this case, the viscosity of the flowable material is, for example, 1 m to 30 mPa · sec. It is preferable to adjust to the extent. In addition, additives such as preservatives, surfactants, antioxidants, or thickeners are added to the flowable material, for example, for the purpose of preventing deterioration of the flowable material or adjusting characteristics. Also good.

  Further, the specific gravity of the ink (ink droplet) may be larger than that of the fluid material in consideration of the sedimentation speed of the ink. Therefore, as the fluid material, depending on the physical properties of the ink to be used, for example, as described above, saturated hydrocarbons (paraffinic, naphthenic, etc.), mineral oil, etc. can be suitably used. It is also conceivable to use a liquid such as silicon oil.

  The inventors of the present application have also confirmed through experiments and the like that water can be suitably used as a fluid material in practice. Moreover, as water, tap water etc. can be used suitably, for example. When water is used as the fluid material, for example, the cost of the fluid material can be significantly reduced. In addition, it is possible to significantly reduce the load on the environment. In this case, since the viscosity of the fluid material is sufficiently low, the fluid material can be appropriately discharged using the ink jet head. Moreover, as a fluid material, you may use the water which added various additives etc., for example. Further, for example, it is conceivable to use a liquid mainly composed of water.

  Moreover, in the above, about the use of a fluid material, it demonstrated mainly using when forming a space | gap in the molded article 50. FIG. However, in a further modification of the modeling operation, for example, it is conceivable to form a void in the support layer using a fluid material. If comprised in this way, the usage-amount of the ultraviolet curable ink etc. which are used as a material of a support layer can be reduced, for example. In addition, this makes it possible to greatly reduce the cost of modeling. In this case, for example, it is possible to shorten the time required for removing the support layer by setting a part of the support layer in a liquid state. In addition, for example, it becomes possible to reduce the amount of waste generated by removing the support layer.

  In this case, the ultraviolet curable ink used as the material for the support layer is an example of a support material (support material for the solid portion) that constitutes a solid portion in the support layer. Further, in this case, regarding the relationship between the support material for the solid portion and the flowable material, it can be considered that the support material for the solid portion is gradually dissolved by the flowable material. More specifically, for example, when a water-soluble material is used as the support material for the solid part and water or the like is used as the fluid material, the solid part in the support layer is formed by the fluid material during the modeling of the model 50. It will dissolve to some extent. Therefore, if constituted in this way, time required for removal of a support layer can be shortened more appropriately, for example. In this case, as described with reference to FIGS. 8 and 9, for example, if a fluid material is stored around the modeled object 50, the outer portion of the support layer is also dissolved to some extent during modeling. Can do. Therefore, with this configuration, the time required for removing the support layer can be further shortened.

  The present invention can be suitably used for, for example, a manufacturing method of a shaped article.

DESCRIPTION OF SYMBOLS 10 ... Modeling system, 12 ... Modeling apparatus, 14 ... Control PC, 50 ... Modeling object, 52 ... Support layer, 54 ... Wall part, 60 ... Lid, 62. ..Filling material, 70... Frame, 72... Weight, 102... Head, 104... Modeling table, 106. Adsorption unit, 112 ... guide bar, 120 ... control unit, 130 ... filling unit, 132 ... guide bar, 152 ... downward convex part, 202 ... model part, 204 ... Air gap 210 ... Air injection hole 212 ... Filler discharge hole 302 ... Discharge nozzle 304 ... Blade 400 ... Carriage 402 ... Inkjet head 404 ... Inkjet Head, 406... Inkjet head 408 ... UV light source, 410 ... flattening roller, 500 ... liquid storage container, 502 ... first liquid chamber, 504 ... second liquid chamber, 506 ... filter, 508 ···pump

Claims (22)

It is a manufacturing method of a modeled object that manufactures a three-dimensional modeled object by laminating layers of modeling materials,
For the weight of at least a part of the shaped article, set to a set weight that is different from the weight at the time of filling, which is the weight when formed by filling with a laminated material that is a material used for lamination,
Forming at least a part of the modeled object in which the set weight is set in a state in which a void that is an area that is not formed of the laminated material is formed inside, according to the set weight. A method for producing a featured article.   The center of gravity of the model is received from a user, and the direction of the center of gravity of the model is set based on the center of gravity instruction. Production method.   The molded article according to claim 1 or 2, wherein a substance having a specific gravity different from that of the laminated material is placed in the gap to form at least a part of the molded article according to the set weight. Production method.   Forming the shaped article having a plurality of the voids therein, and putting a substance having a specific gravity different from that of the laminated material into some of the voids, and shaping the shaped article with respect to at least some of the voids. The method for manufacturing a modeled object according to claim 1 or 2, wherein the modeled object is formed so that the gap is empty in a completed state.   The method of manufacturing a shaped article according to claim 4, wherein the shaped article having the plurality of gaps having the same shape is formed.   The method for producing a modeled object according to any one of claims 1 to 5, wherein a weight is placed in the gap to form the modeled object.   The method for manufacturing a shaped article according to claim 6, wherein the weight in the gap moves in the gap according to the direction of the shaped article in a state where the shaping of the shaped article is completed.   The method for manufacturing a modeled object according to claim 1 or 2, wherein the modeled object is formed such that the gap is empty in a state where the modeling of the modeled object is completed.   After forming the gap, the opening of the gap is closed with a lid prepared in advance, and the laminate material is further laminated on the lid to form the shaped object so that the gap is empty. The manufacturing method of the molded article according to claim 8.   The void is formed in a state filled with a filling material that is a substance different from the laminated material, and the laminated material is further laminated on the filling material, and then the filling material in the void is The method of manufacturing a modeled object according to claim 8, wherein the modeled object is formed by removing the gap so that the gap is empty.   11. The void according to claim 1, wherein the void is formed in a state of being filled with a fluid material that maintains fluidity in the void, and the laminated material is further laminated on the fluid material. The manufacturing method of the molded article in any one.   The method for producing a shaped article according to claim 11, wherein water or a liquid containing water as a main component is used as the fluid material. Using a modeling table for placing the modeled object being modeled on the upper surface,
At the time of modeling the modeled object, a wall portion surrounding the modeled object being modeled with a gap in between is further formed on the modeling table,
The modeled article according to claim 11 or 12, wherein when the fluid material overflows from the gap, the fluid material is stored between the modeled article being modeled and the wall portion. Manufacturing method. A head portion for discharging the material of the modeling;
A modeling table for placing the modeled object being modeled on the upper surface;
A container for storing liquid, and using a liquid storage container disposed at a position facing the head portion across the modeling table,
The at least one period during modeling of the modeled object is characterized in that the modeled object being modeled is immersed in the liquid in the liquid storage container together with the modeling table. The manufacturing method of the modeling thing of description. It is a manufacturing method of a modeled object that manufactures a three-dimensional modeled object by laminating layers of modeling materials,
By forming the layer of the laminated material, which is a material used for lamination, by stacking, the shaped object having a void inside which is a region not formed of the laminated material is formed,
And after forming the said space | gap in the state filled with the filling material which is a substance different from the said laminated material, and laminating | stacking the said laminated material on the said filling material further, the said filling material in the said space | gap A method of manufacturing a modeled object, wherein the modeled object is formed by removing material so that the gap is empty.   The molded object according to claim 15, wherein a hole connecting the inside of the void and the outside of the molded object is further formed, and the filling material in the void is removed through the hole. Production method.   The method for manufacturing a shaped article according to claim 15 or 16, wherein the filling material is a fluid material that maintains fluidity in the gap.   The method for manufacturing a shaped article according to claim 17, wherein a substance having a specific gravity greater than that of the laminated material is used as the fluid material. It is a manufacturing method of a modeled object that manufactures a three-dimensional modeled object by laminating layers of modeling materials,
By forming the layer of the laminated material, which is a material used for lamination, by stacking, the shaped object having a void inside which is a region not formed of the laminated material is formed,
And forming the void in a state of being filled with a fluid material that maintains fluidity in the void, and further laminating the laminated material on the flowable material. Method. A modeling apparatus for manufacturing a three-dimensional modeled object by laminating layers of modeling materials,
A head portion for discharging the material of the modeling;
A control unit for controlling the operation of the head unit,
In the shaped article, at least a part of the weight is set to a set weight that is a weight different from a weight at the time of filling that is a weight when formed by filling with a laminated material that is a material used for lamination,
The control unit causes the head unit to form at least a part of the modeled object in which the set weight is set in a state in which a gap that is an area that is not formed of the laminated material is included therein, A modeling apparatus that is formed according to the set weight. A modeling apparatus for manufacturing a three-dimensional modeled object by laminating layers of modeling materials,
A head portion for discharging the material of the modeling;
A control unit for controlling the operation of the head unit,
The control unit causes the head unit to form the modeled object in a state of having a void that is an area that is not formed of the laminated material.
The void is formed in a state where the inside is filled with a filling material which is a substance different from the laminated material,
The control unit causes the head part to further laminate the laminated material on the filling material,
The modeling apparatus is characterized in that the cavity is formed to be empty by removing the filling material after the laminated material is laminated on the filling material. A modeling apparatus for manufacturing a three-dimensional modeled object by laminating layers of modeling materials,
A head portion for discharging the material of the modeling;
A control unit for controlling the operation of the head unit,
The control unit causes the head unit to form the modeled object in a state of having a void that is an area that is not formed of the laminated material.
The void is formed in a state where the inside is filled with a fluid material that maintains fluidity in the void,
The control unit causes the head unit to further stack the layered material on the flowable material.

Images