JP2021154752A - Method for producing molded article and molding device - Google Patents

Abstract

To more suitably produce a molded article.SOLUTION: The present invention relates to a method for producing a molded article in which the layers of molding materials are laminated to produce a three-dimensional molded article 50. The layers of lamination materials as materials used for lamination are superimposed and formed to mold the molded article 50 having a cavity 204 as a region not formed by the lamination materials inside of it, and the cavity 204 is formed in a state where the inside is filled with a material for filling as a substance different from the lamination materials. The lamination materials are further laminated on the material for filling. Thereafter, the material for filling in the cavity 204 is removed, to form the molded article 50 so that the cavity 204 is emptied.SELECTED DRAWING: Figure 1

Description

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

Conventionally, a modeling device (3D printer) for modeling a modeled object using an inkjet head is known (see, for example, Patent Document 1). In such a modeling device, for example, by stacking a plurality of layers of ink formed by an inkjet head, a modeled object is modeled by a layered manufacturing method.

Japanese Unexamined Patent Publication No. 2015-71282

When a modeled object is modeled by a modeling device, the weight of the modeled object is determined according to the specific gravity of the laminated material, which is the material to be laminated at the time of modeling, and the size of the modeled object. However, depending on the intended use of the modeled object, it may be desired to make the weight of the modeled object heavier or lighter. Further, depending on the shape of the modeled object, for example, the weight balance may be lost if the model is simply modeled. 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 modeled object by a more appropriate method. Therefore, an object of the present invention is to provide a method for manufacturing a modeled object and a modeling apparatus capable of solving the above problems.

The inventor of the present application considered to adjust the weight, the center of gravity, etc. by providing a void (cavity) inside instead of forming the shape of the modeled object as it is at the time of modeling the modeled object. With this configuration, for example, the weight, center of gravity, and the like of the modeled object can be appropriately formed without affecting the appearance of the modeled object. Further, through further diligent research, a feature necessary for obtaining such an effect was found, and the present invention was reached.

In order to solve the above problems, the present invention is a method for producing a three-dimensional model by laminating layers of materials for modeling, and the weight of at least a part of the model is. , At least one of the shaped objects in which the set weight is set by setting the set weight, which is a weight different from the weight at the time of filling, which is the weight when filled with the laminated material which is the material used for laminating. The portion is characterized in that it is formed in a state in which a void, which is a region not formed by the laminated material, is formed inside, so that the portion is formed according to the set weight.

With this configuration, for example, the weight of the modeled object can be appropriately adjusted to a desired weight. Further, in this case, by adjusting the position of forming the void in the modeled object, for example, the center of gravity of the modeled object can be adjusted. Therefore, with such a configuration, for example, the weight and the center of gravity of the modeled object can be brought closer to the desired state. Further, as a result, for example, a modeled object can be manufactured more appropriately.

Further, in this configuration, when setting the set weight, for example, an instruction of the center of gravity, which is an instruction for designating 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 direction of the center of gravity. Setting the direction of the center of gravity of the modeled object means, for example, modeling the modeled object so that the direction of the center of gravity of the modeled object is as instructed by the center of gravity.

Further, in this configuration, for example, it is conceivable to form a modeled object in a state having a plurality of voids inside. With this configuration, for example, the weight and center of gravity of the modeled object can be formed more appropriately. Further, for the inside of the void, for example, it is conceivable to put a substance having a specific gravity different from that of the laminated material. In this case, for example, it is conceivable to put a substance having a higher specific density than the laminated material. Further, depending on the set weight and the setting of the center of gravity, for example, it is conceivable to put a substance having a specific gravity smaller than that of the laminated material into the voids.

Further, in order to reduce the weight of the modeled object, for example, the voids may be formed so as to be empty. In this case, emptying the void means, for example, emptying the void when the modeling of the modeled object is completed. Further, in this case, the time when the modeling of the modeled object is completed is, for example, the time when all the steps related to the modeling of the modeled object are completed. Further, emptying the void means that only the surrounding air or the like enters the void without intentionally filling it with another substance or the like.

Further, when a plurality of voids are formed in the modeled object, the substance or the like to be put into each void 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 a part of the voids, and the other voids may be emptied. With this configuration, for example, the weight and center of gravity of the modeled object can be finely adjusted by combining a plurality of voids. Further, in this case, for example, it is preferable to form a plurality of voids having the same shape. With such a configuration, for example, by standardizing the operation of forming the void, it is possible to appropriately prevent the modeling operation from becoming complicated.

Further, regarding the structure of the modeled object, for example, it is conceivable to put a weight in the void and form the weight so that the weight moves in the void according to the direction of the modeled object. With this configuration, the center of gravity of the modeled object can be changed according to the orientation of the modeled object. In addition, this makes it possible to model a wider variety of shaped objects, for example.

Further, when another substance is put inside at the time of forming the void, for example, it is conceivable to further laminate a laminated material on the substance. Further, when forming a gap that empties the inside, for example, it is conceivable to close the opening of the gap with a lid prepared in advance and further form a laminated material on the opening.

Further, when forming a void that empties the inside, for example, it is conceivable to form the void in a state where the inside 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 the 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 connecting the inside of the void and the outside of the modeled object.

Further, in this case, it is preferable to use, for example, a fluid material having a higher specific gravity than the laminated material as the filling material. With this configuration, for example, a layer of laminated material can be appropriately formed on the filling material. Further, 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 for the modeled object, for example, it is conceivable to leave the fluid material inside at least a part of the voids even after the modeled object is completed. As such a fluid material, for example, water, saturated hydrocarbons (paraffin-based, naphthenic-based, etc.), mineral oil, glycerin, or a mixture thereof can be considered. Further, practically, as the fluid material, water, a liquid containing water as a main component, or the like can be preferably used.

Further, when such a fluid material is used, it is conceivable to form a wall portion on the modeling table in order to store the fluid material overflowing during the modeling operation. In this case, the modeling table is, for example, a trapezoidal member on which the modeled object being modeled is placed on the upper surface. Further, more specifically, in this case, for example, at the time of modeling the modeled object, it is conceivable to further form a wall portion surrounding the periphery of the modeled object being modeled on the modeling table with a gap between them. With this configuration, for example, when the fluid material overflows from the voids of the model, the fluid material can be appropriately stored between the model being modeled and the wall portion.

Further, as a method of modeling using a fluid material, for example, it is conceivable to use a liquid storage container or the like arranged at a position facing the head portion across the modeling table. In this case, the head portion is, for example, a configuration for discharging a modeling material. Further, in this case, for example, it is conceivable that the modeled object being modeled is immersed in the liquid in the liquid storage container together with the modeling table during at least a part of the modeling of the modeled object. Even in this configuration, when the fluid material overflows from the voids, the fluid material can be appropriately stored in the liquid storage container. Further, in this case, the liquid in the liquid storage container may be used, for example, as a fluidity support material for supporting the modeled object on the outside of the modeled object.

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

According to the present invention, for example, the weight of the modeled object can be adjusted to more appropriately manufacture the modeled object.

It is a figure which shows an example of the modeling system 10 which executes the manufacturing method of the modeled object which concerns on one Embodiment of this invention. FIG. 1A shows an example of the configuration of the modeling system 10. 1 (b) and 1 (c) show an example of the configuration of the main part of the modeling apparatus 12. It is a figure which explains the modeled object 50 in more detail. FIG. 2A shows an example of the configuration of the modeled object 50 manufactured by the conventional method. FIG. 2B shows an example of the configuration of the modeled object 50 to be modeled in this example. FIG. 2C shows an example of the shape of the voids formed in this example. It is a figure explaining the operation of setting the weight and the center of gravity of the modeled object 50. FIG. 3A is a functional block diagram showing the functions of the modeling system 10. FIG. 3B is a diagram showing an example of setting the center of gravity performed in this example. It is a figure which shows the modification of the structure of the modeled object 50. FIG. 4A shows an example of the configuration of the modeled object 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. 4A. FIG. 4C is a perspective view showing the frame body 70 and the weight 72 installed inside the modeled object 50 in more detail. It is a figure explaining the further modification example of the modeled object 50. FIG. 5A shows an example of the configuration of the modeled object 50 in this modified example. FIG. 5B shows another example of the configuration of the modeled object 50 in this modified example. It is a figure which shows the modification of the structure of the modeling apparatus 12. It is a figure which shows the further modification example of the structure of the modeled object 50. FIG. 7A shows an example of the configuration of the cross section of the modeled object 50 in this modified example, which is orthogonal to the sub-scanning direction. FIG. 7B is a cross-sectional view showing a modeled object 50 in the middle of modeling. It is a figure which shows the further modification example of the operation of the modeling which models the modeled object 50. It is a figure explaining the further modification example of the structure of the modeling apparatus 12. FIG. 9A shows an example of the configuration of the modeling apparatus 12 in this modified example. FIG. 9B shows an example of the configuration of the head portion 102 in the modeling apparatus 12. FIG. 9C shows an example of the configuration of the modeled object 50 to be modeled in this modified example. It is a figure explaining the operation of modeling and further modification example of the structure of the modeling apparatus 12. FIG. 10A shows an example of the configuration of the modeling apparatus 12 in this modified example. 10 (b) and 10 (c) 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.

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 method for manufacturing a modeled object 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 device 12 is an device that manufactures a three-dimensional modeled object by laminating 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 / center of gravity set data) in which the weight and the center of gravity are set for the modeled object to be modeled, and models the modeled object according to this data. I do.

Further, as will be described in more detail later, in this example, the modeling apparatus 12 forms, for example, a modeled object having a plurality of voids (cavities) inside, depending on the setting of the weight and the center of gravity. Further, if necessary, the weight and the center of gravity of the modeled object are adjusted by filling at least a part of the voids 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 device 12. Further, in this example, the control PC 14 generates weight / center of gravity set data based on three-dimensional data indicating a modeled object in, for example, a general-purpose data format. Further, in this case, regarding the setting of the weight and the center of gravity, for example, an instruction is received from the operator (operator) of the modeling system 10, and the weight / center of gravity set data is generated based on the instruction. Then, by sending the generated weight / center of gravity set data to the modeling device 12, the modeling device 12 is made to execute the modeling operation.

As described above, in this example, the modeling system 10 is composed of a plurality of devices, the modeling device 12 and the control PC 14. However, in the modification of the modeling system 10, the modeling system 10 may be configured by one device. In this case, for example, it is conceivable to configure the modeling system 10 with one modeling device 12 including the function of the control PC 14.

Subsequently, a specific configuration of the modeling apparatus 12 will be described. 1 (b) and 1 (c) show an example of the configuration of the main part of the modeling apparatus 12. Further, FIGS. 1 (b) and 1 (c) schematically show an example of the operation of the main part of the modeling device 12 with respect to different timings during the modeling operation. Further, in this example, the modeling apparatus 12 is an apparatus for modeling the modeled object 50 by the additive manufacturing method using an inkjet head, and is divided into a modeling section, a filling section, and a filler selection section as shown in the figure. ing. The additive manufacturing method is, for example, a method of forming a modeled object 50 by stacking a plurality of layers. The modeled object 50 is, for example, a three-dimensional three-dimensional structure.

Further, among the respective parts of the modeling apparatus 12, the modeling portion is a portion that performs an operation of laminating the modeling materials. Further, the filling portion is a portion that performs an operation of filling the voids formed inside the modeled object 50 with the filler. The filler selection unit is a portion that performs an operation of selecting a filler to be filled in the voids. Further, as a specific configuration for executing the operation in each of these parts, in this example, the modeling device 12 includes a head unit 102, a modeling table 104, a scanning drive unit 106, a tray 108, a suction unit 110, and a guide bar. It has 112 and a control unit 120.

The modeling apparatus 12 may have the same or the same configuration as the known modeling apparatus, except for the points described below. More specifically, except for the points described below, the modeling apparatus 12 is the same as or the same as a known modeling apparatus that performs modeling by ejecting droplets that are a material of the modeled object 50 using, for example, an inkjet head. It may have a similar configuration. In addition to the configurations shown in the figure, the modeling device 12 may further include various configurations necessary for modeling the modeled object 50, for example.

The head portion 102 is a portion for discharging the material of the modeled object 50. Further, in this example, ink is used as the material of the modeled object 50. In this case, the ink is, for example, a liquid discharged from the inkjet head. More specifically, in this example, the head portion 102 has a plurality of inkjet heads. Further, these plurality of inkjet heads eject ink that is cured according to a predetermined condition as a material of the modeled object 50. Further, the head portion 102 further has an ultraviolet light source that generates ultraviolet rays, and cures the ink by irradiating the ink after landing with the ultraviolet rays. Further, as a result, each layer constituting the modeled object 50 is formed by stacking the layers, and the modeled object is modeled by the additive manufacturing method. Further, in this example, as the ink, an ultraviolet curable ink (UV ink) that is cured from a liquid state by irradiation with ultraviolet rays is used.

Further, the head portion 102 further discharges the material of the support layer 52 in addition to the material of the modeled object 50. Further, as a result, the modeling device 12 forms a support layer 52 around the modeled object 50, if 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 at the time of modeling the modeled object 50, and is removed after the completion of the modeling process performed by the modeling apparatus 12 (after the completion of the laminating operation). Further, in FIGS. 1B and 1C, for convenience of illustration, the modeled object 50 being modeled is shown together with the support layer 52.

In this example, the ink used as the material of the modeled object 50 is an example of the laminated material which is the material used for laminating. Further, in this case, the ink used as the material of the modeled object 50 is, for example, an ink other than the material of the support layer 52. Further, in this example, the head portion 102 further has, for example, a flattening means for flattening the ink layer before curing the ink. As the flattening means, for example, a roller or the like that flattens the ink layer by scraping a part of the ink before curing can be preferably used.

Further, as the modeled object 50 to be modeled in this example, the modeling device 12 may model, for example, a modeled object 50 having a colored surface. In this case, the head unit 102 has, for example, an inkjet head for ink of each color of the basic color (process color) of color expression. Further, in this case, it is preferable that the head portion 102 further includes, for example, a light-reflecting ink (for example, white ink) used for forming a light-reflecting region, an inkjet head for colorless and transparent clear ink, and the like. .. In this case, the light-reflecting region is formed inside the colored region on the surface of the model 50. Further, the head portion 102 may further include, for example, an inkjet head for modeling-dedicated ink used for forming the inside of the modeled object 50.

The modeling table 104 is a trapezoidal member that supports the modeling object 50 being modeled, and the modeled object 50 being modeled is placed on the upper surface. Further, when forming the ink layer, the modeling table 104 supports the modeled object 50 in the modeling portion of the modeling apparatus 12 so as to face the head portion 102, for example, as shown in FIG. 1 (b). Further, in this example, the modeling table 104 has a configuration in which at least the upper surface can be moved in the stacking direction (Z direction in the drawing), and is driven by the scanning drive unit 106 to model the modeled object 50. At least the upper surface is moved as the process progresses. In this case, the laminating direction is, for example, the direction in which the 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 figure) and the sub scanning direction (X direction in the figure).

Further, in this example, the modeling table 104 can also be moved in a direction in the plane orthogonal to the stacking direction. For example, at the timing of filling the voids in the modeled object 50 with the filler, for example, FIG. 1 (c). As shown in the above, the vehicle moves away from the position facing the head portion 102 and moves to the filling portion. Further, as a result, the modeled object 50 is made to face the suction unit 110 in the filling portion.

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, moving relative to the modeled object 50 being modeled means, for example, moving relative to the modeling table 104. Further, having the head portion 102 perform the scanning operation means, for example, causing the inkjet head of the head portion 102 to perform the scanning operation. Further, in this example, the scanning drive 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 of ejecting ink while moving in the main scanning direction. The sub-scanning operation is, for example, an operation of moving 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 portion 102 in the stacking direction relative to the modeled object 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.

Further, in this example, the scanning drive unit 106 further moves the modeling table 104, the suction unit 110, and the like at the time of executing the operation of filling the voids of the modeled object 50 with the filler. More specifically, at the time of executing the operation of filling the voids with the filler, the scanning drive unit 106 charges the suction unit 110 with the filler (FIG. 1) in the filler selection unit, for example, as shown in FIG. 1 (b). The fillers 62a and 62b) inside are adsorbed. Then, after adsorption, as shown in FIG. 1 (c), the adsorption unit 110 holding the filler is moved to the filling portion. 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. Further, as a result, the modeled object 50 and the suction unit 110 are opposed to each other in the filling portion. Then, the position of the filler held by the adsorption unit 110 is aligned with the void formed in the modeled object 50, and the adsorption of the filler or the like by the adsorption unit 110 is stopped, so that the filler is contained in the void. To install.

Further, for example, when a void that is not filled with the filler inside is formed in the modeled object 50, the scanning drive unit 106 sucks the lid 60 on the suction unit 110 instead of the filler. Then, in the filling portion, the lid 60 is installed so as to close (cover) the opening of the gap. In this case, the opening of the gap is an opening that opens upward in the stacking direction.

The tray 108 is a holding portion for holding the lid 60, the fillers 62a, b, etc. in the filler selecting portion. In this case, the lid 60 is a member for closing the opening of the gap in the modeled object 50, if necessary, as described above. Further, the fillers 62a and 62b are members that can be inserted into the voids in the modeled object 50. Further, in this example, the tray 108 holds, as the fillers 62a and b, a filler having a specific gravity different from that of each ink of the material of the modeled object 50. In this case, the fact that the specific gravity of the filler is different from that of each ink means that, for example, the weight of the filler is different from that of forming an object having the same shape as the filler with each ink.

Further, in this example, as the plurality of types of fillers 62a and b, fillers having different weights are used. In this case, for example, it is conceivable to use a filler having a specific density smaller than that of each ink as one of the plurality of types of fillers 62a and b, and to use a filler having a specific density larger than that of each ink as the other. With this configuration, for example, more various adjustments can be appropriately made with respect to the weight and specific gravity of the modeled object 50.

In FIGS. 1 (b) and 1 (c), the shapes of the fillers 62a and 62 are shown in a rectangular parallelepiped shape for convenience of illustration. However, the shapes of the fillers 62a and 62b are preferably formed to match the shape of the voids, for example. The shape of the voids and the like will be described in more detail later.

The suction unit 110 has a configuration in which the lid 60 and the fillers 62a and 62 held in the tray 108 are sucked and moved. In this example, as described above, the suction unit 110 sucks the lid 60 and the fillers 62a and b held in the tray 108 in the filler selection portion and moves them to the filler. Further, in the filling portion, the lid 60 is installed on the upper part of the void in the modeled object 50, and the fillers 62a and 62b are installed in the void.

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 rod-shaped member that guides the movement of the suction unit 110. Further, 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, the CPU of the modeling device 12, and controls the modeling operation of the modeling object 50 by controlling each unit of the modeling device 12. In this example, the control unit 120 forms a plurality of voids in the modeled object 50 based on the weight / center of gravity set data received from the control PC 14. In addition, if necessary, a filler is installed in at least a part of the voids. Further, as a result, the control unit 120 causes the modeling device 12 to model the modeled object 50 in a state where the weight and the center of gravity are adjusted. In this case, modeling the modeled object 50 with the weight and the center of gravity adjusted means, for example, based on the setting of the weight and the center of gravity received from the operator of the modeling system 10, the modeled object 50 without forming a gap inside. The modeled object 50 is modeled in a state where the weight and the center of gravity are different from those in the case of modeling. According to this example, for example, the weight of the modeled object can be adjusted to more appropriately manufacture the modeled object.

In the above description, regarding the configuration of the modeling apparatus 12, mainly, the configuration when the lid 60 and the fillers 62a and b are automatically installed by the suction unit 110 has been described. In this case, in the middle of the modeling operation, the operation of laminating the ink layers in the modeling portion is temporarily stopped at the timing when the gap is formed. Then, the lid 60 and the fillers 62a and 62b are installed at the filling portion. Further, after the lid 60 and the like are installed, the operation of laminating ink layers is continued at the modeling portion. Further, in the modified example of the configuration of the modeling apparatus 12, for example, the lid 60 and the fillers 62a and b may be manually installed by an operator or the like. In this case, for example, it is conceivable to appropriately interrupt the operation of laminating the ink layers and install the lid 60 and the fillers 62a and 62b.

Subsequently, the modeled object 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. 2A is a diagram showing an example of the configuration of the modeled object 50 manufactured by the conventional method, and shows a simplified example of the configuration of the cross section of the modeled object 50 orthogonal to the sub-scanning direction.

When the modeled object 50 is manufactured by the modeling device, it is conceivable to model the modeled object 50 having various shapes, for example, the bird-shaped modeled object 50 shown in the drawing. Then, in this case, for example, if the modeled object 50 is simply modeled, as shown in the drawing, the entire modeled object 50 is usually formed as the model unit 202. In this case, the model portion 202 in the modeled object 50 is a portion of the modeled object 50 formed by the ink of the modeling material. Further, the model unit 202 can be considered as, for example, an area of the material (modeling material) used for modeling as it is.

However, when the modeled object 50 is modeled in this way, the center of gravity may be biased depending on the shape of the modeled object 50, and the modeled object 50 may fall down when installed in the original posture. In this case, installing 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 standing posture when the bird-shaped modeled object 50 is modeled. It is to install the modeled object 50 in the original posture of the object to be used.

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 modeled object 50 as a whole by forming a pedestal at the lowermost portion of the modeled object 50. However, even in this case, if there is an unbalanced portion other than the pedestal, the modeled object 50 may be easily broken. More specifically, for example, when modeling a bird-shaped model 50 as shown in the figure, the legs of the bird are thin, so that they are easily broken due to the weight of the portion above the legs. It is conceivable that it will become.

In addition to the problem of the center of gravity, for example, the weight of the modeled object 50 itself may be a problem. For example, when the modeled object 50 is modeled by a conventional method as shown in FIG. 2A, 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. Then, in this case, as the size of the modeled object 50 increases, the weight increases by that amount. However, depending on the use of the modeled object 50, there may be a case where the weight of the modeled object 50 is desired to be heavier or lighter.

On the other hand, in this example, as described above, the modeled object is formed by forming a plurality of voids in the modeled object 50 and filling at least a part of the voids with a filler as needed. Adjust the weight and center of gravity of 50. FIG. 2B is a diagram showing an example of the configuration of the modeled object 50 to be modeled in this example, and shows a simplified example of the configuration of the cross section orthogonal to the sub-scanning direction for the example of the modeled object 50. FIG. 2C shows an example of the shape of the voids formed in this example.

As described above, in this example, the modeling device 12 (see FIG. 1) models a modeled object 50 having a plurality of voids inside. 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 voids 204a to 204 are formed inside the modeled object 50. Further, among these, the voids 204a to 204c are voids formed inside the main body portion of the modeled object 50, and are formed in the same shape. In this case, the main body portion of the modeled object 50 is a portion of the modeled object 50 excluding an additional portion such as a pedestal. Further, the same shape of the void means, for example, that the shape of the wall surface (side surface) surrounding the void is the same.

Further, as shown in the figure, in this example, all the voids formed in the main body portion of the modeled object 50 are fixed in the same shape. With such a configuration, for example, by standardizing the operation of forming the void, it is possible to appropriately prevent the modeling operation from becoming complicated. Further, in this case, for example, the design operation for generating the weight / center of gravity set data can be further simplified. Further, by forming a large number of small voids having a fixed shape, for example, the weight and the center of gravity of the modeled object 50 can be finely adjusted more appropriately. Further, for example, as a filler for filling the voids, a filler having a certain shape can be commonly used. Furthermore, when the lid is automatically installed in the gap, the filler is installed in the gap, and the like, as in the case of using the modeling device 12 of this example, the shape of the gap is made the same. It can also be easier to control.

Further, in this example, the voids in the modeled object 50 are formed without using the support layer. Therefore, as the voids, as shown as the voids 204 in FIG. 2C, the side surfaces are formed in a shape that does not overhang in the stacking direction. In this case, the shape that does not overhang means that the angle θ shown in the figure is about 90 ° or less.

Further, in this example, the weights at the positions of the voids are made different from each other by making the internal states of the voids 204a to 204 different from each other. Further, as shown in the figure, a plurality of voids are formed as each of the voids 204a to 204c. With this configuration, for example, the weight and the center of gravity of the modeled object 50 can be appropriately adjusted.

More specifically, among the voids 204a to c, the void 204a is an empty void. In this case, emptying the void means that the void is emptied at least when all the steps related to the modeling of the modeled object 50 have been completed. Further, emptying the void means that only the surrounding air or the like enters the void without intentionally filling it with another substance or the like. By forming such an empty void 204a in the modeled object 50, for example, the weight of the modeled object 50 can be reduced.

Further, the ultraviolet curable ink used as the material of the modeled object 50 in the additive manufacturing method has a specific gravity of, for example, about 1 to 1.2 in the state of the resin after curing. Therefore, when an empty void 204a is formed, the weight of the modeled object 50 can be reduced at a rate of about ^{1 to 1.2 g (grams) per 1 cm 3 volume.} In this case, for example, the center of gravity of the modeled object 50 can be adjusted by forming an empty void 204a inside a part of the modeled object 50.

Here, when forming a void inside the modeled object 50, it is necessary to further laminate an ink layer on the void. Therefore, in this example, when the empty gap 204a is formed, the opening of the gap 204a is closed by using the lid 60 as described above. In this case, after forming the gap 204a, the opening of the gap 204a is closed with the lid 60, and ink is further laminated on the lid 60. With this configuration, for example, an empty void 204a can be appropriately formed inside the modeled object 50. Further, regarding the gap 204a, for example, a gap in which only the lid 60 is installed and no filler is installed can be considered.

The voids 204b and c are voids for filling the inside with a filler. Further, among these, the gap 204b is a gap in which a light filler having a smaller specific gravity than the ink used for forming the model portion 202 is installed. Further, in this example, the filler installed in the void 204b is, for example, one of the fillers 62a and b (see FIG. 1). By forming such a gap 204b, it is possible to reduce the weight of a part of the modeled object 50 in a state where the weight is heavier than in the case of forming an empty gap 204a.

Further, the gap 204c is a gap in which a heavy filler having a larger specific gravity than the ink used for forming the model portion 202 is installed. Further, in this example, the filler installed in the void 204c is, for example, the other filler of the fillers 62a and 62b. By forming such a gap 204c, a part of the modeled object 50 can be made heavier than the case where the model portion 202 is used.

As the filler to be installed in the void 204c, for example, it is conceivable to use a filler made of metal or the like. More specifically, for example, it is conceivable to use a filler made of steel having a specific gravity of about 7 to 8. In this case, by installing the filler in the void 204c, the modeled object 50 can be weighted at a ratio of about 6 to 7 g (grams) per ^{1 cm 3 volume.} Further, as the filler for the void 204c, for example, it is conceivable to use a filler made of aluminum having a specific gravity of about 2.7. In this case, by installing the filler in the void 204c, the modeled object 50 can be weighted at a ratio of about 1.5 to 1.7 g (gram) per ^{1 cm 3 volume.} Further, as the filler for the void 204c, for example, it is conceivable to use a filler formed of SUS (stainless steel) or the like.

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

Further, among the voids formed in the modeled object 50, the void 204d is a void formed inside a portion formed as a pedestal of the modeled object 50. In this case, the pedestal of the modeled object 50 is, for example, a portion that supports the entire modeled object 50 at the lowermost part in the direction of gravity when the modeled object 50 is installed in a predetermined direction. Further, in this case, in order to stably support the modeled object 50, it is preferable that the pedestal portion is formed sufficiently heavy. With this configuration, for example, the horizontal stability can be appropriately improved by lowering the center of gravity of the entire modeled object 50.

Further, for the pedestal part, it is sufficient to increase the weight, and fine adjustment or the like is not necessary. Therefore, in this example, the void 204d has a different shape from the other voids 204a to c, and is made larger. Further, in the gap 204d, a heavy filler having a large specific gravity is installed as in the case of the gap 204c, for example.

As the filler to be installed in the gap 204d, the gaps 204b and c are matched to the shape of the gap.
It is conceivable to use a larger filler with a different shape than the one used. In this case, the tray 108 (see FIG. 1) in the modeling apparatus 12 further holds, for example, the filler for the void 204d. Further, the large filler for the gap 204d may be manually installed by an operator, for example, during the modeling operation. Further, for the gap 204d, for example, it is conceivable to install a plurality of fillers having the same shape as those for the gaps 204b and c side by side.

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

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 portion is weighted, and the upper portion is lightened. For example, the region A including the pedestal and the lowermost portion of the main body is formed so that the specific gravity is, for example, about 2 to 6 by forming the gaps 204c and d. Further, the region B above the region A is formed so that the specific gravity of the model portion 202 is the same as that of the model portion 202, for example, about 1 to 1.2 by not forming a gap. Further, the region C above the region B is formed so that the specific gravity is, for example, about 0.2 to 0.6 by forming the gap 204b. Then, the upper region C is formed so that the specific gravity is, for example, about 0.1 to 0.4 by forming the gap 204a. With this configuration, a stable modeled object 50 with a low center of gravity can be appropriately modeled.

Here, in FIG. 2B, with respect to the weight and the center of gravity of the modeled object 50, a case where the lower portion is simply weighted and the upper portion is lightened is illustrated. However, it is conceivable that the weight and the center of gravity of the modeled object 50 are set in more detail according to the object represented 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, taking a picture with a 3D scanner, the weight of the modeled object 50 is the weight of the object to be measured measured by the 3D scanner. It is conceivable to perform modeling according to the above. Further, in this case, for example, if the measurement result is reduced or enlarged for modeling, it is conceivable that the weight is also scaled according to the magnification of the modeling. As for the center of gravity, it is conceivable to set the center of gravity of the modeled object 50 according to the object to be measured.

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

Regarding the modeling operation of the modeled object 50 in this example, for example, at least a part of the modeled object 50 is formed with the above-mentioned voids 204a to 204 inside, and the weight is set to a preset value. It is also possible to think about matching operations. In this case, the set weight is, for example, a weight set for at least a part of the modeled object 50. Further, the set weight is set to a weight different from the filling weight, which is the weight when the void is formed without forming, for example. Further, in this case, by forming an empty gap 204a, a gap 204b, c or the like in which a filler having a specific gravity different from that of the model part 202 is installed, each part of the modeled object 50 is formed according to the set weight of the modeled object 50. 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 modeled object 50 is modeled without forming voids, the internal region, which is less important in appearance than the vicinity of the surface, is also formed with an expensive material (ink). On the other hand, when a gap is formed in the modeled object 50, the amount of ink used can be appropriately reduced by, for example, emptying the gap. Further, when filling the voids with a filler, for example, a material having a lower cost than ink can be used. Therefore, according to this example, it is possible to reduce the manufacturing cost of the modeled object 50 and the like.

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

Note that FIG. 3A is a diagram schematically showing various functions of the modeling system 10 related to the operation of setting the weight and the center of gravity of the modeling object 50. Therefore, each block does not necessarily correspond to a physical configuration (for example, a unit of an electronic circuit). Further, among the blocks shown in FIG. 3A, the block showing modeling shows, for example, the function of the modeling device 12 (see FIG. 1). Further, the block showing a function other than modeling shows, for example, the function of the control PC 14 (see FIG. 1). Further, in the modified example of the configuration of the modeling system 10, at least a part of the functions other than modeling may be executed by the modeling device 12.

As described above in connection with FIG. 1, in this example, the control PC 14 generates weight / center of gravity set data based on the three-dimensional data indicating the modeled object 50 to be modeled by the modeling device 12. Further, in this case, the control PC 14 inputs the three-dimensional data which is the original data of the modeling by, for example, operating the CAD software or receiving the three-dimensional data from the client server or the like. Further, the control PC 14 calculates the weight of the modeled object 50 when modeling is performed with the original data as it is, based on the input three-dimensional data (original data) (original data weight calculation).

Further, 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 finally sets the desired weight for the weight of the modeled object 50 (weight setting). In this case, the final desired weight is the weight of the final modeled object 50 (the total weight of the modeled object 50) at the time when the modeling is completed.

Further, the operator further sets the direction of the center of gravity finally desired for the center of gravity of the modeled object 50 (center of gravity setting). In this case, the direction of the center of gravity that is finally desired is the direction of the center of gravity that matches the direction in which the modeled object 50 is installed after the modeling is completed. More specifically, regarding the setting of 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 whether to make the side of the end. That is, in this case, one of the six directions of + X, −X, + Y, −Y, + Z, and −Z is selected. In this case, for example, in FIG. 3B, -Z is selected when the modeled object 50 is modeled in the direction with the reference numeral A, and + Y is selected when the modeled object 50 is modeled in the direction with the reference numeral B. You will have a choice.

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). Then, based on this calculation result, calculation and control for adding voids and fillers in the modeled object 50 are performed, and weight / center of gravity set data to be supplied to the modeling device 12 is generated (data control).

More specifically, in this case, the control PC 14 selects, for example, the shape and number of voids required to eliminate the difference based on the calculated difference in weight (selection of void shape / number).
Further, in this case, for example, the shape and the number of voids are selected by reading the shape of the void from the void shape memory that stores the shapes of a plurality of types of voids prepared in advance and using the shape of the void. Further, for each void, the necessity of installing the filler and the type of the filler used when the filler is installed (filled) are selected (filler selection). Further, by doing so, the filler is assigned to each void. Further, in this case, by reading out the weight, shape, etc. of the filler from the filler weight memory that stores the weight, shape, etc. of each type of the plurality of types of fillers prepared in advance, the filler can be used. Make allocations, etc. Further, in this example, the filler shape memory further stores the shape of the lid covering the opening of the void to be emptied. Then, for the voids to be emptied, the lid is assigned based on the shape of the lid read from the filler shape memory and the like.

Further, after the weight of the modeled object 50 is adjusted to the set weight by determining the shape and number of voids and the filler to be used, for example, by adjusting or selecting the position where the voids are formed, the direction of the center of gravity (Select the center of gravity adjustment position). In this case, the center of gravity is aligned with the direction of the center of gravity set by the operator, the gap for inserting the heavy filler is arranged in the direction of the center of gravity, and the gap 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, the weight / center of gravity set data in which the voids and the filler are set are generated according to the adjusted state. Then, the generated data is output to the modeling apparatus 12 (weight / center of gravity set data output). Further, as a result, the modeling device 12 is made to model the modeled object 50 whose weight and center of gravity are adjusted (modeling). According to this example, for example, the weight and the center of gravity of the modeled object 50 can be adjusted to more appropriately manufacture the modeled object 50.

Here, in the above, one example of the operation of setting the weight and the center of gravity of the modeled object 50 has been specifically described. However, the specific operation of setting the weight and the center of gravity is not limited to the operation described above, and may be changed in various ways. For example, the weight setting operation for setting the weight can be more generalized, and can be considered, for example, an operation for setting a desired set weight for at least a part of the modeled object 50. Further, the operation of setting the center of gravity can be considered as, for example, an operation of receiving a center of gravity instruction from the user, which is an instruction for designating the direction of the center of gravity of the modeled object 50.

Further, in the above, the adjustment of the weight and the center of gravity has been mainly described with respect to the operation when the control PC 14 automatically performs the adjustment. 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, the weight and the center of gravity of the modeled object 50 may be adjusted by the operator himself / herself 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 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 modified example of the configuration of the modeled object 50. Except for the points described below, the configurations with the same reference numerals as those in FIGS. 1 to 3 in FIG. 4 may have the same or similar characteristics as the configurations in FIGS. 1 to 3.

In the above, in the case where the void is not left empty, the configuration in which the filler having a shape matching 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, it is conceivable to install an object smaller than the size of the void in the void. Further, in this case, for example, it is conceivable to install a substance so that the object can move in the void.

More specifically, FIG. 4 shows an example of the configuration of the modeled object 50 in the case where the lure used for fishing is modeled as the modeled object 50. FIG. 4A shows an example of the configuration of the modeled object 50 used as a lure. Further, in FIG. 4A, for convenience of illustration, the state of the void 204 formed inside the modeled object 50 is transparently illustrated by using a broken line.

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

With this configuration, the weight 72 in the gap 204 will move in the gap 204 according to the orientation of the modeled object 50 after the modeling is completed (when using a lure, etc.). Further, in this case, the center of gravity of the modeled object 50 moves (changes) as the weight 72 moves. More specifically, when the modeled object 50, which is a lure, is used, a thread is connected to the head of the lure as shown in the figure. Then, in this case, when the thread is pulled, the lure body moves forward (toward the head), but the weight 72 inside the lure moves (remains) backward (toward the tail) due to inertia. As a result, the center of gravity is moved backward and the tail of the lure is lowered. Also, when you stop pulling the thread, the lure body stops due to the resistance of water, but the weight moves forward (toward the head) due to inertia. As a result, the center of gravity is forward and the head is lowered. Then, by repeating such an operation, the lure can pitch (up and down) and invite the fish.

FIG. 4B is a diagram for explaining the operation of modeling the modeled object 50 shown in FIG. 4A in more detail, and is a cross section corresponding to the portion indicated by the alternate long and short dash line in FIG. 4A. 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 inside the modeled object 50 in more detail.

In the case of modeling the modeled object 50 as in this modification, the frame body 70 and the weight 72 are inserted in the gap 204 during the operation of laminating the ink layers, and an ink layer is further formed on the frame body 70 and the weight 72. .. More specifically, in this case, for example, as shown in FIG. 4B, the laminating operation is temporarily performed at the timing of laminating the ink layers until the model portion 202 is formed around the region of the void 204. Stop and install the frame 70 and the weight 72 in the gap 204. Then, after these installations, the stacking of the ink layers is restarted, and the model portion 202 is further formed on the frame body 70 in the stacking direction. With this configuration, the modeled object 50 whose center of gravity changes can be appropriately modeled. Further, as a result, for example, various modeled objects 50 can be modeled more appropriately.

Subsequently, a modified example will be described with respect to the configuration of the empty void 204 and the method of forming the void 204. FIG. 5 is a diagram for explaining a further modification example of the modeled object 50, and in the case of forming an empty void 204 without using the lid 60 (see FIG. 1), the configuration of the void 204 and the formation of the void 204 are formed. An example of how to do it is shown. FIG. 5A shows an example of the configuration of the modeled object 50 in this modified example. FIG. 5B shows another example of the configuration of the modeled object 50 in this modified example.

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

In this modification, the empty void 204 is formed without using a lid or the like that closes the opening of the void 204. Further, in this case, a filling material which is a substance different from the ink used as the laminated material is used, and the void 204 is temporarily filled with the filling material during the modeling operation, and then the filling material is removed. Then, an empty void 204 is formed without using a lid. More specifically, in this case, in the operation of forming the modeled object 50 containing the voids 204 inside by laminating the ink layers, for example, the laminating operation is interrupted and the filling material is filled in the voids 204. Then, the void 204 is formed in a state where the inside is filled with the filling material. Then, the ink is further laminated on the filling material in the void 204. Moreover, these operations are repeated as necessary. Then, by removing the filling material in the gap 204 until the modeled object 50 is completed, the modeled object 50 is formed so that the void 204 is emptied.

Further, in this case, although not shown in FIG. 5A, a hole connecting the inside of the void 204 and the outside of the modeled object 50, for example, the filler discharge hole 212 in FIG. 5B, is shown. It is preferable to form. In this case, the holes such as the filler discharge hole 212 are through holes that penetrate the model portion 202 from the surface of the modeled object 50 and reach the inside of the void 204. With this configuration, the filling material can be appropriately removed through holes such as the filler discharge hole 212.

Further, in this case, as the filling material, for example, it is preferable to use a fluid material that can be removed from the pores. In this case, the fluidity material is, for example, a substance that maintains fluidity even at the timing when the modeling is completed, unlike the ink used for forming the model portion 202. Further, the fluid material can be considered as, for example, a substance that maintains fluidity in the void 204. More specifically, in this modification, the fluid material is a substance that exists in a liquid state in the void 204. Further, in this case, when laminating the ink layer on the void 204, the ink layer is laminated on the fluid material with the void 204 filled with the fluid material. With this configuration, the voids 204 that become empty after the removal of the fluid material can be appropriately formed.

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

Further, it is preferable that the air injection hole 210 and the filler discharge hole 212 are formed so as not to be conspicuous on the surface of the modeled object 50. Further, in this case, it is preferable to make a small hole having the minimum necessary size. The air injection hole 210 and the filler discharge hole 212 may be formed at the time of laminating the ink layers as in the case of the void 204 or the like, or may be formed by a drill or the like after the laminating operation is completed.

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. 5 (b). Is preferable. Further, in this case, as shown in FIGS. 5A and 5B, the number of holes formed by the modeled object 50 is increased by connecting the plurality of voids 204 by contacting the adjacent voids 204. Can be reduced appropriately. In this case, connecting the plurality of voids 204 means, for example, making the filling material circurable between the plurality of voids 204. Further, in this case, it is preferable that the empty voids 204 formed in the modeled object 50 are formed so that all the voids 204 are connected.

Further, when a fluid material is used as the filling material, it is necessary to use a material such that the ink does not sink 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 density higher than the specific gravity (for example, about 1.1) of the ink constituting the model portion 202. More specifically, as such a fluid material, for example, a fluorine-based inert liquid, a hydrofluoroether, fluorocarbons, or the like can be considered.

Further, the fluid material used as the filling material is preferably, for example, a material that does not cause a chemical reaction or the like due to contact with the ink constituting the surrounding model portion 202. In this case, not causing a chemical reaction or the like due to contact with the ink means, for example, not causing a chemical attack (reaction) with 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 the filling material discharge hole 212 or the like. Further, when considering the modeling cost of the modeled object 50 and the like, it is preferable that the fluid material is a substance that can be reused by collecting it after use and filtering it, for example.

Further, as for the fluid material, even when a liquid having a small specific gravity is used, it can be used as a filling material as long as it is a substance having a sufficiently high viscosity. In this case, for example, if the ink ejected to the overhanging portion of the fluid material has a viscosity capable of curing the ink before sinking into the fluid material, the fluid material A layer of ink 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 hydrocarbons (paraffin-based, naphthenic-based, 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 preferably used as the fluid material.

As described above, according to the present modification, for example, an empty void 204 can be appropriately formed inside the modeled object 50. Further, as a result, 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. Further, in this case, for example, the amount of ink used to form the model unit 202 can be reduced. Further, as a result, for example, the manufacturing cost of the modeled object 50 can be appropriately reduced.

Further, 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 or the like. Therefore, according to this modification, it is possible to form voids 204 having various shapes according to the shape of the modeled object 50, for example. Further, as a result, when modeling the modeled object 50 having various shapes, an empty void 204 can be more appropriately formed inside.

In this case as well, the wall surface surrounding the gap 204 is 9 with respect to the surface of the ink to be laminated.
It is preferably formed at an angle of less than 0 degrees and in a shape that does not overhang. With this configuration, the operation of forming the void 204 can be performed more easily and appropriately. Further, it is conceivable that the position where the void 204 is formed in the modeled object 50 is determined according to the direction according to the set weight and the center of gravity, as in the case described with reference to FIGS. .. Further, in this case, in order to stabilize the modeled object 50 (lower the center of gravity), it is preferable not to form a gap 204 at a position (low position) below the gravity direction when the modeled object 50 is installed. ..

Further, the filling of the filling material (fluid material) in the void 204 at the time of modeling the modeled object 50 may be performed automatically (automatically) by, for example, an apparatus, or manually (manually) operated by an operator. ) May be used. Further, in the case of automatic filling, it is conceivable to form the modeled object 50 by using the modeling device 12 having a function of filling the filling material.

FIG. 6 is a diagram showing a modified example of the configuration of the modeling device 12, and shows an example of the configuration of the modeling device 12 having a function of filling a filling material. Except for the points described below, the configurations with the same reference numerals as those in FIGS. 1 to 5 in FIG. 6 may have the same or similar characteristics as the configurations in FIGS. 1 to 5. For example, the modeling apparatus 12 shown in FIG. 6 may have the same or the same characteristics as the modeling apparatus 12 shown in FIG. 1, except for the points described below. Further, the modeling device 12 shown in FIG. 6 may further include the same or similar configurations as the modeling device 12 of FIG. 1 in addition to the configurations 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 the 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 has 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).

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

If the filling amount can be precisely controlled at the time of filling the filling material, the squeegee step performed by using the blade 304 may be omitted. Further, in this case, the required degree of precision is, for example, the ratio of the amount to be removed at the time of flattening the ink used for modeling (flattening removal rate of the modeling material), the thickness of one layer of ink, and the voids. It is determined by the volume of 204 and the like. Further, 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 in the voids 204 formed at various positions in the modeled object 50.

Further, in the present modification, the filling material is filled by temporarily suspending the lamination of the ink layers. More specifically, in this case, in the middle of the modeling operation performed by the head unit 102 in the modeling unit of the modeling device 12, for example, at the timing when the formation of one gap 204 is completed, a signal indicating the end of the formation of the gap 204 (void). Formation end signal) is generated. Then, the operation of laminating ink is temporarily stopped based on the void formation end signal, and the modeling table 104 is moved from the modeling portion to the filling portion. Further, in the filling section, the filling material is automatically filled into the void 204 by discharging the filling material from the discharge nozzle 302 of the filling unit 130. With this configuration, for example, the filling material can be appropriately filled before forming an overhanging layer of ink on the void 204.

Further, after filling the voids 204, the modeling table 104 is returned to the modeling portion, and an ink layer is further formed on the filling material in the voids 204. In this case, the ink ejected from the inkjet head in the head portion 102 flies in the direction corresponding to the lower side of the drawing in parallel with the Z direction, and lands (adheres) on the filling material in the void 204. Then, in this case, the ink layer can be appropriately formed on the gap 204 by irradiating the ink with 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 filling material in the voids 204 is removed to form an empty void 204 in the modeled object 50. With this configuration, for example, the modeled object 50 having an empty void 204 inside can be appropriately modeled while automatically filling the filling material.

Here, when the filling material is filled, the upper surface (liquid level) of the filling material in the void 204 is higher than the upper surface of the laminated ink 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. With this configuration, it is possible to appropriately prevent excess filling material from overflowing to the outside of the void 204. 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 stop filling at the timing when the upper surface of the laminated surface is reached at the time of temporary stop. With this configuration, the filling material can be filled more appropriately with high accuracy.

Further, in this case, it is not always necessary to fill the filling material to the same height as the laminated upper surface at the time of suspension, but if the filling material is filled to a position sufficiently close to the laminated upper surface at the time of suspension, the filling material can be filled therein. The ink layer can be formed appropriately. Therefore, at the time when the filling of the filling material is completed, the position of the upper surface of the filling material may be lower than that of the laminated upper surface at the time of pausing. More specifically, for example, although it depends on the volume of the void 204, the position of the upper surface of the filling material at the time when the filling is completed may be, for example, a difference of about 1 mm or less from the laminated upper surface at the time of pausing. For example, it can be filled (supplemented) with the amount of ink (flattening removal amount) to be removed by the subsequent flattening of the ink layers.

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

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

Further, 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 void 204 is formed, the operation of laminating the ink layers is temporarily stopped, and the filling material is filled. Further, in this case, the pause may be performed by the operator monitoring the operation of stacking, or may be automatically performed by generating a gap formation end signal. Further, in these cases, the modeling apparatus 12 has a function of suspending the stacking of ink layers in response to, for example, an operator's instruction or a void formation end signal. Further, when the pause is automatically performed, it is preferable to have a function of asking the operator to perform an operation of filling the filling material.

Further, in the case of manual filling, the operator fills the void 204 with the filling material using, for example, a syringe. Further, in this case, for example, it is preferable to inject a slightly larger amount of the filling material and then squeeze the laminated upper surface at the time of suspension with a soft blade or the like to remove the excess filling material. Further, after filling, the lamination is restarted from the layer of the ink that has been paused.

Subsequently, a further modification example of the configuration of the modeled object 50 will be described. FIG. 7 shows a further modification example of the configuration of the modeled object 50. FIG. 7A shows an example of the configuration of the cross section of the modeled object 50 in this modified example, which is orthogonal to the sub-scanning direction. FIG. 7B is a cross-sectional view showing a modeled object 50 in the middle of modeling. Except for the points described below, the configurations with the same reference numerals as those in FIGS. 1 to 6 in FIG. 7 may have the same or similar characteristics as the configurations in FIGS. 1 to 6.

Further, also in this modification, the modeled object 50 having an empty space 204 inside is formed by filling the gap 204 with a filling material such as a fluid material in the middle of modeling and then removing the filling material. To model. Further, in this case, as described above in relation to FIG. 6, since it is not necessary to form the gap 204 according to the shape of the lid or the like, it is possible to form the gap 204 having various shapes. become. Therefore, in this modified example, the modeled object 50 is modeled by using only the portion of the modeled object 50 along the outer peripheral surface as the model portion 202 and the other portions as the voids 204. In this case, as shown in the drawing, only the portion having a predetermined thickness along the surface of the modeled object 50 becomes the model portion 202. In this case, the thickness is the thickness in the normal direction orthogonal to the surface of the modeled object 50. Further, in this case, the entire inside of the model portion 202 along the surface of the modeled object 50 becomes the void 204. According to this modification, for example, the weight of the modeled object 50 can be significantly reduced. In addition, the amount of ink used for modeling can be significantly reduced, and the modeling cost of the modeled object 50 can be appropriately suppressed.

Further, when forming such a modeled object 50, the wall surface surrounding the void 204 is inclined at various angles. More specifically, for example, when modeling the modeled object 50 as shown in FIG. 7, at least a part of the wall surface surrounding the void 204 has an overhang shape. Therefore, in this case, the filling material is filled in the voids 204 in parallel with the operation of laminating the ink layers forming the model portion 202, and the ink layers are laminated, for example, as shown in FIG. 7B. It is preferable that the upper surface of the ink layer (upper surface of the laminate) and the upper surface of the filling material to be filled (upper surface of the filling material) are always aligned. With this configuration, voids 204 of various shapes can be appropriately formed. Further, also in this case, for example, by forming the air injection hole 210 and the filler discharge hole 212 which are through holes connecting the void 204 and the outside of the modeled object 50, the filling material once filled in the void 204 is appropriate. Can be removed.

Further, with respect to the configuration of the modeled object 50, the operation of modeling to model the modeled object 50, the configuration of the modeling device 12, and the like, further modification examples can be considered. For example, in the above, the case where the filling material is removed for all the voids 204 has been described with reference to FIGS. 6 and 7. However, in the modified example of the configuration of the modeled object 50, for example, it is conceivable that the filling material is left filled in some of the voids 204 without removing the filling material.

Further, in the above, the case where a fluid material such as a liquid is mainly used as the filling material has been described. However, as the filling material, it is conceivable to use a material other than liquid. In this case, for example, it is conceivable to use a filling material that is solid at the time of filling and liquefies or vaporizes according to predetermined conditions. More specifically, it is also conceivable to use a substance or the like that sublimates from a solid state to a gaseous state as a filling material, such as dry ice. 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 modeling operation for modeling the modeled object 50 and a further modification example of the configuration of the modeling device 12 will be described. FIG. 8 is a diagram showing a further modification of the modeling operation for modeling the modeled object 50, and is a case where modeling is performed using a modeling device 12 having the same or the same configuration as that shown in FIG. A modified example of how to model the object 50 is shown. Except for the points described below, the configurations with the same reference numerals as those in FIGS. 1 to 7 in FIG. 8 may have the same or similar characteristics as the configurations in FIGS. 1 to 7.

As described above, in the modeling operation described with reference to FIG. 6, a liquid fluid material is discharged from the filling unit 130 as a filling material to fill the voids of the modeled object 50. do. This also causes the fluid material to function, for example, as a support layer in the voids, forming an overhanging layer of ink above the voids. Then, with respect to these points, even in the case shown in FIG. 8, the modeling operation is performed in the same manner or in the same manner. Then, in the modified example of the modeling operation shown in FIG. 8, when the fluid material overflows from the void due to overflow from the void or the like, the fluid material is prevented from being greatly spread on the modeling table 104. A wall portion 54 is further formed on the modeling table 104. Further, as a result, when the fluid material overflows from the void, the fluid material is stored in the region surrounded by the wall portion 54.

More specifically, in this 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. The wall portion 54 can be considered, for example, a configuration for preventing the fluid material from flowing out from the modeling table 104. Further, the wall portion 54 can be considered as a configuration for holding the overflowing fluid material. Further, in this case, for example, in the initial stage of the operation of modeling the modeled object 50, in parallel with the modeling of the modeled object 50 (at the same time as the modeling of the modeled object 50), the wall portion 54 surrounding the periphery of the modeled object 50 being modeled is formed. It is formed on the modeling table 104. Further, in this case, the modeled object 50 and the support layer 52 are provided with a gap between the modeled object 50 and the support layer 52 so that the fluid material can be stored between the modeled 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 the molding table 104. Enclosing the periphery of the modeled object 50 and the support layer 52 is, for example, surrounding the outer side of the support layer 52 formed on the outer side of the modeled object 50.

When configured in this way, the fluid material overflowing from the voids is stored between the modeled object 50 and the wall portion 54 in the area surrounded by the wall portion 54 without spreading widely on the modeling table 104. It will be. Therefore, with this configuration, for example, even if the fluid material overflows from the voids, the influence on the surroundings can be appropriately suppressed. Further, in this case, after the process of modeling the modeled object 50 performed by the modeling apparatus 12 is completed (after the completion of the laminating operation), for example, before or after peeling the modeled object 50 and the support layer 52 from the modeling table 104, etc. In addition, only the fluid material within the range surrounded by the wall portion 54 may be removed by suction with a dropper or the like, and the modeling table 104 may be cleaned. Further, the fluid material may be removed 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. Further, the wall portion 54 can be easily and appropriately removed from the modeling table 104 by, for example, breaking the wall portion 54 after removing the fluid material. Therefore, according to this modification, for example, the modeling operation performed using the fluid material can be performed more appropriately.

Here, it is preferable that the modeled object 50 and the support layer 52 are peeled off after, for example, the wall portion 54 is removed. With such a configuration, for example, the peeling operation can be performed more easily without any unnecessary surroundings (wall portion 54). The height of the wall portion 54 (height in the stacking direction) may be a height (required 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. Further, the wall portion 54 may be formed of any material (ink) used for forming the support layer 52 and the modeled object 50. More specifically, the wall portion 54 may be formed of, for example, 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 inside of the modeled object 50, or any of these. It is conceivable to form using a plurality of inks. Further, the wall portion 54 may be formed by using, for example, both a support material and an ink used for modeling the modeled object 50.

Further, as described above in connection with FIG. 6, when 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, the fluid material is placed in the void. It is conceivable to control the upper surface (liquid level) of the fluid 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 the voids with as much fluid material as possible. In such a case, when the voids are almost completely filled, the surface is usually slightly raised due to the influence of surface tension. Further, in this case, for example, it is conceivable to discharge a larger amount of the fluid material than the minimum necessary amount so that the fluid material in the voids is not insufficient. In such a case, the excess fluid material that exceeds the laminated surface during the laminating operation overflows from the voids 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 be done. Further, as a result, it is conceivable that the amount of the fluid material that overflows onto the modeling table 104 during modeling increases. On the other hand, according to this modification, for example, even when the amount of the fluid material overflowing onto the modeling table 104 is large, the overflowing fluid material can be appropriately stored in a certain region.

Further, in the above, the configuration and operation when the fluid material is discharged mainly by using the filling unit 130 different from the head portion 102 will be described with reference to FIGS. 6 and 8. However, in a further modification of the configuration of the modeling apparatus 12, for example, the fluid material may be discharged depending on the configuration inside the head portion 102.

FIG. 9 is a diagram illustrating a further modification example of the configuration of the modeling apparatus 12. FIG. 9A shows an example of the configuration of the modeling apparatus 12 in this modified example. FIG. 9B shows an example of the configuration of the head portion 102 in the modeling apparatus 12. FIG. 9C shows an example of the configuration of the modeled object 50 to be modeled in this modified example. Except for the points described below, the configurations with the same reference numerals as those in FIGS. 1 to 8 in FIG. 9 may have the same or similar characteristics as the configurations in FIGS. 1 to 8.

As described above with reference to FIGS. 6 and 8, when the fluid material is ejected using the filling unit 130 (see FIG. 6), the operation of laminating the ink is temporarily stopped and the fluid flows. It is conceivable to discharge the sex material. However, in this case, if the number of times the modeling is paused increases, the time required for the modeling may increase significantly. On the other hand, in this modification, by ejecting the fluid material according to the configuration inside the head portion 102, for example, an ink layer is formed without suspending the operation of laminating the inks constituting the modeled object 50. Further discharge the fluid material during the main scanning operation for this.

More specifically, in this modification, the modeling apparatus 12 includes a head portion 102 capable of discharging a fluid material. Further, the head portion 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 configuration of the head portion 102. Further, in this example, the head portion 102 includes, as a plurality of inkjet heads, 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. Have. These plurality of inkjet heads are arranged side by side in the main scanning direction, for example, by aligning the positions in the sub-scanning direction.

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 the modeled objects 50. An inkjet head that ejects ink used as a material, and ejects inks of different colors. More specifically, the inkjet head 402w ejects white (W color) ink. The inkjet head 402y ejects yellow (Y color) ink. The inkjet head 402m ejects magenta (M color) ink. The inkjet head 402c ejects cyan (C color) ink. The inkjet head 402k ejects black (K color) ink. Further, the inkjet head 402t ejects clear ink. In this case, the clear ink is, for example, a clear color ink which is a colorless transparent color (T).

Further, among the inkjet heads included in the head portion 102, the inkjet head 404 ejects ink used as a support material which is a material of the support layer 52. As the support material, for example, a known material for the support layer can be preferably used. Further, as the inkjet head 404, for example, the same or similar inkjet head as the inkjet heads 402w to t can be preferably used. Further, the inkjet head 406 is an inkjet head that ejects a fluid material. The inkjet head 406 ejects the fluid material in parallel with the modeling operation during the 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, the same or similar inkjet head as the inkjet heads 402w to t can be preferably used.

In this modification, since the head portion 102 has the inkjet head 406, the fluid material is discharged according to the configuration inside the head portion 102. Further, the head portion 102 of this modification can be considered, for example, a configuration in which the inkjet head 406 is added to the head portion 102 in the configurations shown in FIGS. 1 to 8 and the like.

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 this example, each of the plurality of ultraviolet light sources 408 is arranged on one end side and the other end side of the head portion 102 in the main scanning direction so as to sandwich an array of inkjet heads between them. As the ultraviolet light source 408, for example, a UV LED (ultraviolet LED) or the like can be preferably used. The flattening roller 410 is a flattening means for flattening a layer of ink formed during modeling of the modeled object 50. The flattening roller 410 flattens the ink layer by contacting the surface of the ink layer and removing a part of the ink before curing, for example, during the main scanning operation. Further, in the present modification, the flattening roller 410 also functions as a configuration for removing excess fluid material exceeding the laminated surface in the voids of the modeled object 50 during the laminating 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, similarly to the blade 304 in the filling unit 130 shown in FIG. 8, it is conceivable that the flattening roller 410 extrudes the excess fluid material from the laminated surface.

With such a configuration, the fluid material can be discharged as a part of the function of the modeling portion without providing a filling portion or the like in addition to the modeling portion for modeling by the head portion 102. Therefore, according to this modification, for example, the configuration of the modeling apparatus 12 can be further simplified and miniaturized. Further, in this case, as described above, the fluid material can be filled in the voids of the modeled object 50 without suspending 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. Further, as a result, for example, the modeling of the modeled object 50 can be performed more efficiently.

Further, in this case, since it is not necessary to suspend the modeling at the timing of discharging the fluid material into the void, it is possible to form the void with a higher degree of freedom. Therefore, according to this modification, for example, it is possible to further increase the degree of freedom in the shape and number of voids to be formed. Further, in this case, by ejecting the fluid material using the inkjet head, it is possible to more precisely control the ejection amount and the ejection position of the fluid material. In addition, this makes it possible to more appropriately form voids of various shapes, for example.

Further, in this case, for example, as shown in FIG. 9C, it becomes possible to form the void 204 matching the shape of the modeled object 50 with higher accuracy. More specifically, in FIG. 9C, the figure on the left side shows an example of the appearance (appearance of the modeled object) of the completed modeled object 50. Further, the figure on the right side shows the state of the cross section of the modeled 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 modification of the shape of the modeled object 50. In this case as well, the modeled object 50 has a model portion 202 and a gap 204, as in the case of the modeled object 50 shown in FIG. 7, for example. Further, in this case, the void 204 in the modeled object 50 is formed by using, for example, a fluid material discharged from the inkjet head 406 in the head portion 102. More specifically, in this case, at the time of modeling the modeled object 50, the model portion 202 and the void 204 are formed by forming the surrounding model portion 202 in a state where the region where the void 204 is to be formed is filled with the fluid material. The modeled object 50 to be possessed is modeled. Further, in this case, it is conceivable that the fluid material filled in the void 204 is removed from the modeled object 50 by the completion of all the steps related to the modeling. In this case, for example, it is conceivable to form a hole in a part of the surface of the modeled object 50 and extract the fluid material through the hole. Further, depending on the intended use of the modeled object 50, the required quality, and the like, all the steps related to the modeling of the modeled object 50 may be completed with the fluid material filled in the voids 204.

Here, in each of the configurations described above, as the material (external support material) of the outer support layer 52 of the modeled object 50, a support material that supports the model unit 202 in a solid state is used. More specifically, it is conceivable to use, for example, an ultraviolet curable ink containing an ultraviolet curable resin as such a support material. On the other hand, when the void 204 is formed in the modeled object 50 by using the fluid material as in each configuration described above, the fluid material to be filled in the void 204 is surrounded in the void 204. It can also be considered as a material (fluidity support material) or the like that constitutes the support portion that supports the model portion 202. Then, in this way of thinking, regarding the configuration in which the void 204 inside the model 50 is filled with the fluid material, for example, the fluid material is used as the support material for the void 204 inside the model 50, and the model is modeled. It can be considered that the UV curable ink is used as the external support material for the object 50.

Further, in a further modification of the modeling operation and the configuration of the modeling device 12, for example, a fluid material is used as a support material for supporting the modeled object 50 (model unit 202) on the outside of the modeled object 50. May be good. Further, in this case, for example, it is conceivable to model the modeled object 50 by using the water tank-shaped liquid storage container 500.

FIG. 10 is a diagram illustrating a further modification of the modeling operation and the configuration of the modeling device 12. FIG. 10A shows an example of the configuration of the modeling apparatus 12 in this modified example. Except for the points described below, the configurations with the same reference numerals as those in FIGS. 1 to 9 in FIG. 10 may have the same or similar characteristics as the configurations in FIGS. 1 to 9.

In this modification, the modeling device 12 further includes, for example, a liquid storage container 500 in addition to the configuration of the modeling device 12 shown in FIG. 9A. The liquid storage container 500 is a water tank-shaped container for storing liquid, and has 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 the liquid. The first liquid chamber 502 is a liquid chamber having a size capable of accommodating the modeling table 104 inside, and is arranged at a position facing the head portion 102 with the modeling table 104 in between, and the modeled object 50 being modeled is placed on the upper surface. By accommodating the placed modeling table 104 inside, the modeling object 50 is immersed in the liquid in the first liquid chamber 502 together with the modeling table 104. Further, in this modification, the liquid level of the first liquid chamber 502 overflows as shown in the drawing, so that the liquid level is lower than the lower surface of the head portion 102 and always at a position aligned with the laminated surface during modeling. It is maintained. Further, the height of the liquid level (position of the liquid level) of the first liquid chamber 502 can be set by, for example, adjusting the height of the outlet from which the liquid overflows. 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 according to 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 for storing the liquid overflowing from the first liquid chamber 502 due to the overflow of the first liquid chamber 502. The position of the liquid level of the second liquid chamber 504 is adjusted so as to be lower than the position of the liquid level of the first liquid chamber 502, for example, as shown in the figure. Further, in this modification, the first liquid chamber 502 and the second liquid chamber 504 are connected to each other 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 a liquid from the second liquid chamber 504 to the first liquid chamber 502, and sends 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, the liquid can be appropriately circulated between the first liquid chamber 502 and the second liquid chamber 504 while filtering the liquid with the filter 506. Further, 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 liquid in the first liquid chamber 502 The position of the surface can be adjusted appropriately. Further, in this case, for example, as shown in the drawing, it is preferable to make adjustments so that the position of the upper surface of the stack and the position of the liquid level of the liquid in the first liquid chamber 502 coincide with each other. Further, by circulating the liquid in this way, for example, the liquid in the liquid storage container 500 can be appropriately reused. Further, for example, when the liquid becomes dirty due to long-term use, it is preferable to discharge the liquid from the waste liquid port (not shown) and replace it with a new liquid.

With this configuration, for example, the overhanging portion on the outer peripheral side of the modeled object 50 can be appropriately supported by the liquid in the first liquid chamber 502 without forming a support layer in a solid state. In this case, the support layer in the solid state is, for example, a support layer formed by ultraviolet curable ink. Therefore, even in this modification, for example, the modeled objects 50 having various shapes can be appropriately modeled.

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

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

Further, in this case, the liquid to be stored in the first liquid chamber 502 from the beginning is preferably the same liquid as the fluid material discharged from the head portion 102, for example. With this configuration, for example, it is possible to appropriately prevent the composition of the liquid in the first liquid chamber 502 from changing due to the flow of the fluid material. Further, depending on the conditions required for modeling and the like, a liquid different from the fluid material discharged from the head portion 102 may be used as the liquid to be stored in the first liquid chamber 502 from the beginning.

Further, also in this modification, the support layer 52 in a solid state may be further formed instead of supporting the modeled object 50 only by the liquid in the first liquid chamber 502. 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 modeled object 50. With this configuration, for example, a portion that is more reliably supported during modeling can be more reliably supported by using the support layer 52 in a solid state. Further, in this case, for example, it is conceivable to form a support layer 52 on the modeling table 104 before starting modeling of the modeling object 50 to support a part of the modeling object 50 formed on the support layer 52.

Further, depending on the shape of the modeled object 50 to be modeled, it may be necessary to form the support layer 52 in a solid state. 10 (b) and 10 (c) 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. Further, among these, FIG. 10B shows an example of the shape of the modeled object 50 that can be modeled without forming the support layer 52 in the solid state. FIG. 10 (c) shows an example of the shape of the modeled object 50 in which it is necessary to form the support layer 52 in the solid state.

More specifically, the modeled object 50 shown in FIG. 10B is a modeled object 50 having a shape continuously connected from the bottom on the modeling table 104. In the case of the modeled object 50 having such a shape, the ink is supported by the liquid (liquid level) in the first liquid chamber 502 at the time of forming any of the ink layers constituting the modeled object 50. Layers can be formed appropriately. Therefore, in this case, the modeled object 50 can be appropriately modeled without forming the support layer 52 in the solid state.

However, when the modeled object 50 shown in FIG. 10 (c) is modeled, a portion such as a portion shown as a downward convex portion 152 exists in the drawing, so that the modeled object 50 is continuously connected from the bottom on the modeling table 104. Must not be. Then, when modeling such as the discontinuous model 50, it is considered that the modeling cannot be performed appropriately by simply supporting the layer of ink being modeled with a liquid. More specifically, in this case, the portion of the ink layer being formed that is included in the downward convex portion 152 is formed on the modeling table 104 in a state of being separated from other portions that are continuously continuous from the bottom. In this case, simply forming a layer of ink on the liquid does not determine the position of the portion included in the downward convex portion 152, and may float on the liquid and flow to an unintended position, for example. Therefore, in such a case, for example, as shown in the figure, it is preferable to form the support layer 52 in a solid state and connect it to the portion included in the downward convex portion 152. With this configuration, for example, it is possible to appropriately prevent the portion included in the downward convex portion 152 from flowing to an unintended position. Further, as a result, for example, the modeled objects 50 having various shapes can be modeled more appropriately.

Subsequently, further supplementary explanations and the like will be given regarding the operation of forming voids in the modeled object 50 using the fluid material. In the above, as an example of the substance used as a fluid material, for example, water, saturated hydrocarbon (paraffin-based, naphthen-based, 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 they satisfy the functions required as the fluid material used for modeling.

Further, in this case, regarding the function required as the fluid material, for example, it is conceivable that the ink can be appropriately cured when the ink used for modeling the modeled object 50 is ejected onto the fluid material. For that purpose, for example, when a droplet of ink is ejected onto the fluid material, the ink drops (settles) into the fluid material within the time required to cure the ink. , It is necessary that deterioration does not occur. More specifically, as the fluid material, for example, it is conceivable to use (a) a substance having a specific gravity close to or heavy to that of the ink, or (b) a substance having a high viscosity and taking a long time for the ink to sink. Be done. As the material corresponding to (a), for example, a paraffin solvent may be used. It is also conceivable to use a fluorine-based inert liquid such as hydrofluoroether or fluorocarbons. Further, as the material corresponding to (b), for example, glycerin, a mixed solution of glycerin and water, or the like can be considered.

Considering only the function of supporting the ink layer formed on the layer, the higher the viscosity, the less the ink sinks, and therefore the function as a filler for filling the voids is good. I can say. However, in this case, when the final extraction is performed from the modeled object 50, the extraction may become 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 inkjet head, it becomes difficult to discharge the material if the viscosity is high. Therefore, in this case, the viscosity of the fluid material is, for example, 1 m to 30 mPa · sec. It is preferable to adjust the degree. Further, to the fluid material, for example, an additive such as a preservative, a surfactant, an antioxidant, or a thickener is added for the purpose of preventing deterioration of the fluid material or adjusting its characteristics. May be 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, for example, saturated hydrocarbons (paraffin-based, naphthen-based, etc.), mineral oil, and the like can be preferably used depending on the physical characteristics of the ink used. It is also conceivable to use a liquid such as silicone oil.

In addition, the inventor of the present application has also confirmed through experiments and the like that water can be suitably used as a fluid material in practical use. Further, as the water, for example, tap water or the like can be preferably used. 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. Further, in this case, since the viscosity of the fluid material is sufficiently low, it is possible to appropriately eject the fluid material using the inkjet head. Further, as the fluid material, for example, water to which various additives and the like are added may be used. Further, for example, it is conceivable to use a liquid containing water as a main component.

Further, in the above, the use of the fluid material has been described mainly for the case of forming voids in the modeled object 50. However, in a further modification of the modeling operation, for example, it is conceivable to use a fluid material to form voids in the support layer. With this configuration, for example, the amount of ultraviolet curable ink used as the material for the support layer can be reduced. In addition, this makes it possible to significantly reduce the cost of modeling. Further, in this case, by making a part of the support layer in a liquid state, for example, it is possible to shorten the time required for removing the support layer. Further, for example, it is possible to reduce the amount of waste generated by removing the support layer.

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

The present invention can be suitably used, for example, in a method for producing a modeled object.

10 ... modeling system, 12 ... modeling device, 14 ... control PC, 50 ... modeled object, 52 ... support layer, 54 ... wall part, 60 ... lid, 62.・ ・ Filler, 70 ・ ・ ・ frame body, 72 ・ ・ ・ weight, 102 ・ ・ ・ head part, 104 ・ ・ ・ modeling table, 106 ・ ・ ・ scanning drive part, 108 ・ ・ ・ tray, 110 ・ ・ ・Suction unit, 112 ... guide bar, 120 ... control unit, 130 ... filling unit, 132 ... guide bar, 152 ... downward convex part, 202 ... model part, 204 ... Void, 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 ... Ultraviolet light source, 410 ... Flattening roller, 500 ... Liquid storage container, 502 ... 1st liquid chamber, 504 ... 2nd liquid chamber, 506 ... filter, 508 ... pump

Claims (7)

It is a manufacturing method of a modeled object that produces a three-dimensional modeled object by laminating layers of modeling material.
By forming the layers of the laminated material, which is a material used for laminating, by stacking the layers, the modeled object having voids, which are regions not formed by the laminated material, is formed.
The voids are formed in a state where the inside is filled with a filling material which is a substance different from the laminated material, and after the laminated material is further laminated on the filling material, the filling in the voids is performed. A method for producing a modeled object, which comprises forming the modeled object so that the voids are emptied by removing the material. The model according to claim 1, wherein a hole connecting the inside of the gap and the outside of the model is further formed, and the filling material in the space is removed through the hole. Production method. The method for producing a modeled object according to claim 1 or 2, wherein the filling material is a fluid material that maintains fluidity in the voids. The method for producing a modeled object according to claim 3, wherein a substance having a specific gravity larger than that of the laminated material is used as the fluid material. It is a manufacturing method of a modeled object that produces a three-dimensional modeled object by laminating layers of modeling material.
By forming the layers of the laminated material, which is a material used for laminating, by stacking the layers, the modeled object having voids, which are regions not formed by the laminated material, is formed.
Further, the manufacture of a modeled product characterized in that the void is formed in a state where the inside is filled with a fluid material that maintains fluidity in the void, and the laminated material is further laminated on the fluid material. Method. It is a modeling device that manufactures a three-dimensional model by laminating layers of modeling materials.
The head part that discharges the molding material and
A control unit that controls the operation of the head unit is provided.
The control unit causes the head unit to form the modeled object in a state in which a gap, which is a region not formed by the laminated material which is a material used for lamination, is formed inside.
The voids are 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 further laminates the laminated material on the filling material on the head unit.
A modeling apparatus characterized in that the voids are formed so as to be emptied by removing the filling material after the laminated material is laminated on the filling material. It is a modeling device that manufactures a three-dimensional model by laminating layers of modeling materials.
The head part that discharges the molding material and
A control unit that controls the operation of the head unit is provided.
The control unit causes the head unit to form the modeled object in a state in which a gap, which is a region not formed by the laminated material which is a material used for lamination, is formed inside.
The voids are formed in a state where the inside is filled with a fluid material that maintains fluidity in the voids.
The control unit is a modeling apparatus characterized in that the laminated material is further laminated on the fluid material on the head unit.

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