JP6316611B2 - Model and manufacturing method thereof - Google Patents

Description

  The present invention relates to a shaped article and a manufacturing method thereof.

  As a technique for modeling a three-dimensional solid object, in addition to a sheet lamination method as described in Patent Document 1, a melt deposition method (FDM: Fused Deposition Molding), an inkjet method, an inkjet binder method, and an optical modeling method (SL: Stereo Lithography), powder sintering method (SLS: Selective Laser Sintering), etc. are known.

  Among them, as an ink jet method, a method of laminating a pattern by spraying an ultraviolet curable resin with a 3D printer is frequently used. In this method, the design and mechanism of the appearance and appearance of the final product is converted into data by three-dimensional CAD, and then the data is sliced by a computer and multilayer pattern data is created such that thin plates are superimposed, and UV curable. A three-dimensional object is manufactured by spraying and laminating resin from a head in accordance with pattern data.

  It is also known to add a pattern or color to a three-dimensional object that has been shaped using such a technique.

JP 2003-71530 A (published March 11, 2003)

  Regarding the three-dimensional modeling by the conventionally known ink jet method, the inventor of the present application ejected ink for modeling and decoration ink (for example, colored ink such as yellow, magenta, cyan, black) by the ink jet method. It has been found that there are cases where decoration (color recording of characters, images, etc. by subtractive color mixing) cannot be expressed. In pursuit of the cause, when a decorative layer formed from decorative ink is provided on the outermost layer of the modeled object, the additive discharged from the inkjet head in the gravitational (downward) direction in the process of forming the decorative layer. It has been found that the decorative ink may fall without being deposited at the place where it should be deposited.

  Then, this invention is made | formed in view of the said subject, and aims at providing the molded article which exhibits a desired decoration, and its manufacturing method.

  In order to solve the above-described problems, a modeled object according to the present invention is provided with a light reflecting layer formed from an ink having light reflectivity, a decorative layer, and a transparent layer formed from a transparent ink. The decorative layer is formed on the outer side of the light reflecting layer, and the transparent layer is formed on the outer side of the decorative layer.

  According to said structure, compared with the case where the layers in which a part of transparent layer is not formed in the edge part side rather than a part of decoration layer are laminated | stacked, of the decoration layer which will be contained in the upper layer to laminate | stack A part of the region that can be formed includes not only a region that overlaps a part of the decorative layer included in the lower layer to be laminated, but also a region that overlaps a part of the transparent layer, and can be widely secured. Thereby, the precision of manufacture becomes somewhat loose, and it can contribute to the improvement of manufacturing efficiency.

  In order to solve the above problems, a manufacturing method of a modeled object according to the present invention is a manufacturing method of manufacturing a modeled object by laminating a plurality of layers, and the modeled object is a surface layer side of the modeled object. From the inside to the inside, it is a shaped article having a transparent layer formed from a transparent ink and a decorative layer in this order, and as two or more layers of the plurality of layers, the end of each layer A layer forming step of forming a layer having a part of the transparent layer and a part of the decorative layer in this order from the side toward the center side is characterized.

  According to said structure, in two or more layers of the several layer laminated | stacked, a part of said transparent layer is provided in the edge part side rather than a part of said decoration layer. Therefore, even when the two or more layers are formed, even if the ink of the layer to be formed on the end side of each layer falls, the layer formed on the end side of the layer is a transparent layer. It is not a decorative layer. Therefore, the modeling object which realized the desired decoration by losing the ink of a decoration layer can be formed.

  Moreover, according to said structure, compared with the case where the layers in which a part of transparent layer is not formed in the edge part side rather than a part of decoration layer are laminated | stacked, the decoration which will be contained in the upper layer to laminate | stack A region where a part of the layer can be formed includes not only a region overlapping with a part of the decorative layer included in the lower layer to be laminated, but also a region overlapping with a part of the transparent layer, and can be widely secured. Thereby, the precision of manufacture becomes somewhat loose, and it can contribute to the improvement of manufacturing efficiency.

  In one aspect of the method for producing a shaped article according to the present invention, in addition to the above configuration, the layer forming step includes a step of forming a part of the transparent layer and a step of forming a part of the decorative layer. And a step of forming a part of the transparent layer is performed before the step of forming a part of the decorative layer.

  According to said structure, since a part of transparent layer is formed ahead of a part of decoration layer regarding a certain layer, this decoration when a part of this transparent layer forms a part of this decoration layer Serves as an outer moat for part of the layer. Thereby, there is no possibility that the ink forming a part of the decorative layer may be undesirably spread or dropped.

  Further, in one aspect of the method for manufacturing a shaped article according to the present invention, in addition to the above configuration, when a new layer is formed on the layer formed by the layer forming step, A part of the decorative layer included is formed so as to overlap a part of the transparent layer of the lower layer.

  Further, in one aspect of the method for manufacturing a shaped article according to the present invention, in addition to the above configuration, when a new layer is formed on the layer formed by the layer forming step, A part of the contained transparent layer is formed so as to overlap with a part of the decorative layer of the lower layer.

  ADVANTAGE OF THE INVENTION According to this invention, the molded article which exhibits a desired color tone can be provided.

It is a perspective view which shows the external shape of one Embodiment of the molded article which concerns on this invention. It is sectional drawing of cutting line AA 'shown in FIG. It is a schematic diagram by the side of the nozzle hole of the inkjet head used for manufacture of the molded article shown in FIG. It is a figure which shows the manufacture process of the molded article shown in FIG. It is a top view in the middle of the manufacturing process of the molded article shown in FIG. It is a fragmentary sectional view of this model for explaining the merit of the model shown in FIG. It is a fragmentary sectional view of a modeling thing of comparative composition. It is a perspective view which shows the modification of the molded article which concerns on this invention. It is a schematic diagram which shows the other aspect of the inkjet head used for manufacture of the molded article which concerns on this invention. It is a schematic diagram which shows the other aspect of the inkjet head used for manufacture of the molded article which concerns on this invention. It is a schematic diagram which shows the other aspect of the inkjet head used for manufacture of the molded article which concerns on this invention. It is a schematic diagram which shows the other aspect of the inkjet head used for manufacture of the molded article which concerns on this invention.

  One embodiment of a modeled object and a manufacturing method thereof according to the present invention will be described with reference to FIGS. 1 to 8. The modeled object according to the present invention is a structure that is three-dimensionally modeled by stacking a plurality of layers (stacking method). Moreover, although the following embodiment demonstrates the form which used the inkjet method as a manufacturing method of a molded article, this invention is not limited to this, and it decorates the surface of a molded article while modeling with a lamination | stacking system. It can be applied to all types of manufacturing methods (recording characters, images, etc. in color).

[1] Configuration of Modeled Object FIG. 1 is a perspective view showing an appearance of a modeled object 50 of the present embodiment. The modeled object 50 of the present embodiment has a substantially cylindrical shape in which the side surface is curved and swells. The shape of the shaped object according to the present invention and the shape of the shaped object manufactured by the manufacturing method according to the present invention are not limited to the shapes shown in FIG. It can be applied to all shapes such as hollow structures, ring structures, and horseshoe types.

  As one of the characteristic configurations of the present invention, in the present embodiment, the ink containing the second transparent layer and the colorant from the surface layer side (outer peripheral side) to the inner side (center side) of the modeled object 50 ( The colored layer (decorative layer) formed by the decorative ink), the first transparent layer formed by the transparent ink, and the light reflecting layer formed from the ink having light reflectivity are formed in this order. There is in point. FIG. 1 shows a state in which the second transparent layer 4 formed from a transparent ink located on the most surface layer side of the modeled object 50 is visible on the curved side surface of the modeled object 50.

  2 is a cross-sectional view taken along line AA ′ shown in FIG. The cross section of the model 50 shown in FIG. 2 is a cross section along the XZ plane at the center position of the model 50 with respect to the XYZ coordinate system shown in FIG.

  In the present embodiment illustrated in FIG. 2, as an example, a three-dimensionally shaped object 50 is illustrated by laminating 21 layers 50 a in the Z direction. The number of layers is not limited to 21.

[2] Configuration of each layer to be stacked FIG. 5 shows an XY plane of one layer 50a in the vicinity of the middle stage. Each layer 50a has a second transparent layer portion 54, a colored layer portion 53, a first transparent layer portion 52, and a light reflecting layer portion 51 from the outer peripheral side toward the center side. It is formed in order. That is, the modeled object 50 of the present embodiment has the first transparent layer 2, the colored layer 3, and the second transparent layer 4 from the light reflecting layer 1, which is the modeled object body, toward the surface layer side (outer peripheral side). It can also be said that and are coated in this order. The thickness of one layer 50a in the Z direction (vertical direction in the figure) is a value suitable for multicolor formation mainly by subtractive color mixing of the colored layer 3, and is in the range of 5 μm to 50 μm. A preferable range in the case of forming a layer by the ink jet method is 10 μm to 25 μm.

  Here, in this embodiment, although the light reflection layer 1 is regarded as a modeled object main body, the light reflecting layer may or may not belong to the modeled object main body. That is, the molded object body or cavity separate from the light reflecting layer is in the center of the modeled object, and the modeled object body (which may not have light reflectivity) is directed to the surface layer side (outer peripheral side). The light reflecting layer, the first transparent layer, the colored layer, and the second transparent layer may be formed in this order. Or you may consider the core part (it does not need to have light reflectivity) and the light reflection layer 1 formed in the surface as a molded article main body.

  As shown in FIG. 2, the plurality of layers 50 a are stacked in the Z direction, so that a portion 54 of the second transparent layer of each layer 50 a is generally connected to the outermost peripheral surface direction of the modeled object 50, so that the second transparent Layer 4 is formed. Further, the colored layer 3 is formed by a portion 53 of the colored layer of each layer 50 a being substantially continuous with the outermost surface of the model 50. In addition, a part 52 of the first transparent layer of each layer 50 a is generally connected to the outermost peripheral surface direction of the modeled object 50 to form the first transparent layer 2. Further, a part 51 of the light reflecting layer is substantially continuous with the outermost surface of the model 50 to form the light reflecting layer 1.

  Moreover, even if it sees the surface of the molded article 50 from all directions of X, Y, and Z by arranging in this way, the order of the second transparent layer, the colored layer, the first transparent layer, and the light reflecting layer Therefore, the color tone expressed by subtractive color mixture can be recognized.

  The dimension in the XY plane direction of the portion 52 of the first transparent layer is set slightly wider than the dimension of the portion 53 of the colored layer with which the portion 52 of the first transparent layer is in contact with the top and bottom. And prevention of mixing of the inks constituting the light reflection layer 1 can be ensured.

  The dimension of the second transparent layer portion 54 in the XY plane direction is set to be slightly wider than the dimension of the colored layer portion 53 with which the second transparent layer portion 54 is vertically contacted. Can be more reliably protected.

  The width of the shaped object 50 along the Z direction (hereinafter referred to as the thickness in the Z direction, which can also be referred to as the height in the Z direction) is not limited, and the thickness in the Z direction of the layer 50a (high) ) Can also be set as appropriate depending on the number of layers. Further, as will be described later, in this embodiment, since the ink-jet method is used for lamination, the thickness in the Z direction of the layer 50a that can be realized by the lamination method may be considered. For example, the thickness of the layer 50a in the case of forming a layer of an ultraviolet curable ink to be described later by the inkjet method is 5 μm to 20 μm depending on the size of the ink droplets. The same data may be stacked and larger ink droplets may be used. In that case, the data amount can be reduced and the modeling speed can be increased.

[3] Configuration of the Light Reflecting Layer 1 (Part 51 of the Light Reflecting Layer) The light reflecting layer 1 (part 51 of the light reflecting layer) is a layer formed of light reflective ink. It has a light reflectivity that can reflect light in the entire visible light region at least on the surface of the colored layer.

  Specifically, the light reflection layer 1 (a part 51 of the light reflection layer) can be formed from an ink containing a metal powder or an ink containing a white pigment, but is preferably formed from a white ink. By forming from a white ink, the light which entered from the surface layer side of the molded article in the light reflection layer 1 can be favorably reflected, and coloring by subtractive color mixture can be realized.

  In the present embodiment, the modeled body is configured by the light reflecting layer 1, but when the light reflecting layer 1 is formed on the surface of a separate modeled body that may not have light reflectivity, The thickness of the light reflecting layer 1, that is, the width from the outer peripheral side to the center side direction of the portion 51 of the light reflecting layer shown in FIG. 2 (hereinafter referred to as the thickness of the light reflecting layer 1) is 5 μm to 20 μm at a minimum. can do. The present invention is not limited to this numerical range.

[4] Configuration of first transparent layer 2 (first transparent layer portion 52) The first transparent layer 2 (first transparent layer portion 52) is formed of a transparent ink.

  Here, the transparent ink may be any ink that can form a transparent layer having a light transmittance of 50% or more per unit thickness. If the light transmittance per unit thickness of the transparent layer is less than 50%, the light transmission is undesirably blocked, and the molded article cannot exhibit a desired color tone due to subtractive color mixing, which is not desirable. Preferably, an ink having a light transmittance of 80% or more per unit thickness of the transparent layer is used, and an ink having a light transmittance of 90% or more per unit thickness of the transparent layer is more preferably used. .

  By disposing the first transparent layer 2 (a part 52 of the first transparent layer) between the light reflecting layer 1 (a part 51 of the light reflecting layer) and the colored layer 3 (a part 53 of the colored layer). It is possible to avoid mixing the colored ink forming the colored layer 3 and the ink forming the light reflecting layer 1. Even if the colored ink that forms the colored layer is mixed with the transparent ink that forms the first transparent layer, the color of the colored layer is not lost, and therefore, an undesirable change in color tone is not caused. Therefore, it is possible to realize a shaped article that exhibits a desired color tone (decoration) in the colored layer 3.

  The width along the center side direction from the outer peripheral side of the portion 52 of the first transparent layer (hereinafter referred to as the thickness of the first transparent layer) is 5 μm to 20 μm at the minimum in the decorative portion on the surface perpendicular to the stacking direction. is there. The present invention is not limited to this numerical range.

[5] Configuration of Colored Layer 3 (Colored Layer Part 53) The colored layer 3 (colored layer part 53) is formed of a colored ink containing a colorant.

  Examples of the ink containing a colorant (hereinafter sometimes referred to as a colored ink) include yellow (Y), magenta (M), cyan (C), and black (K), and light-colored inks. However, the present invention is not limited to this, and red (R), green (G), blue (B), orange (Or), or the like may be added. It is also possible to use metallic, pearl and phosphor colors. In order to express a desired color tone, one or more of these colored inks are used.

  Incidentally, the amount of the colored ink used for forming the colored layer 3 (colored layer portion 53) varies depending on the desired (desired) color tone. Therefore, in the case of a light color tone with a low density, the ink filling density of the colored layer 3 does not reach a predetermined ink filling density with colored ink alone, and unevenness is formed in the height in the Z direction, or X, Y There is a case where a dent without colored ink is formed in the middle along the direction. In any case, inconvenient irregularities are generated in the shaped article formed by the lamination method as in this embodiment, which is not preferable. In particular, in the case of a vertical modeling surface near the middle of the laminated structure shown in FIG. 2, when the ink is formed by the error diffusion method, one cross section of the colored layer 3 has a filling density of a total of four drops of two ink drops vertically and horizontally. The number of colored inks is 4 drops at the maximum (maximum density) and 0 at the minimum (zero density, that is, white), so in the case of the minimum, a gap space of 4 drops may be formed, The quality is greatly impaired from both the modeling and color aspects.

  Therefore, in the present embodiment, the colored layer 3 (colored layer portion 53) is filled with the supplementary ink at locations where the ink filling density of the colored layer 3 (colored layer portion 53) does not satisfy the predetermined ink filling density with only the colored ink. The ink filling density is compensated. That is, the colored layer 3 (the colored layer part 53) is formed so that the total density (number of ink droplets) of the colored ink and the supplemental ink is constant. Thereby, generation | occurrence | production of the dent mentioned above can be avoided and the shape of the molded article 50 can be modeled closely.

  Since the discharge amount of the colored ink and the landing position of each color ink configured in the colored ink are known in advance, the compensation amount and the compensation position (landing position) of the compensation ink can be determined by taking these into account. This determination can be made in the inkjet head device 10 or another control device (not shown).

  Further, by supplementing the ink filling density with the supplementary ink, the surface formed by the colored layer 3 becomes flat, so that a glossy feeling can be given.

  The supplementary ink may be any ink that does not adversely affect the color tone to be exhibited in the colored layer 3 (colored layer portion 53). As an example, the first transparent layer 2 (first transparent layer portion 52) is used. ) And the second transparent layer 4 (a portion 54 of the first transparent layer) can be used.

  The thickness of the colored layer 3, that is, the width from the outer peripheral side to the center side direction of the portion 53 of the colored layer shown in FIG. 2 (hereinafter referred to as the thickness of the colored layer 3) is, for example, 5 μm to 20 μm. Can do.

  In addition, although this embodiment demonstrates based on the colored layer 3, this invention is not limited to a colored layer, If it is a decoration layer, there will be no restriction | limiting in particular.

[6] Configuration of Second Transparent Layer 4 (Part 54 of Second Transparent Layer) The second transparent layer 4 (part 54 of the second transparent layer) is the first transparent layer 2 (first transparent layer). It is formed using the transparent ink described in part 52) of the layer. The second transparent layer 4 and the first transparent layer 2 may be formed using the same type of transparent ink, or may be formed using different types of transparent ink.

  The thickness of the second transparent layer 4, that is, the width along the center side direction from the outer peripheral side of the portion 54 of the second transparent layer shown in FIG. 2 (hereinafter referred to as the thickness of the second transparent layer 4). Can be, for example, 10 μm to 100 μm.

  The second transparent layer 4 not only functions as a protective layer for the colored layer 3, but also makes it possible to manufacture a molded object densely in the present invention (this embodiment) that employs a lamination method. Has an advantageous effect.

  That is, if the colored layer 3 constitutes the outermost layer of the modeled object 50, that is, if a portion 53 of the colored layer is located at the end most in each layer 50a shown in FIG. There is a possibility that (a part 53 of the colored layer) cannot be formed with high accuracy. However, the colored layer 3 (the colored layer portion 53) is formed by forming the second transparent layer 4 (a portion 54 of the second transparent layer) on the outermost layer of the modeled object 50 as in the present embodiment. Since it forms accurately, it can contribute to exhibiting a desired color tone by the 2nd transparent layer 4 (part 54 of a 2nd transparent layer).

  In addition, if the colored layer 3 constitutes the outermost layer of the modeled object 50, the colored layer 3 is exposed, so that discoloration due to rubbing and fading due to ultraviolet rays are likely to occur. However, since the 2nd transparent layer 4 (part 54 of a 2nd transparent layer) is formed in the outermost layer of the molded article 50 like this embodiment, decoloring and fading can be prevented.

[7] Manufacturing Method of Modeled Object Next, a manufacturing method for manufacturing the modeled object 50 of the present embodiment will be described. FIG. 3 is a view showing the lower surface of the inkjet head device 10 used in the manufacturing method. FIG. 4 is a view schematically showing a state in the process of manufacturing the modeled object 50 of the present embodiment.

  On the lower surface of the inkjet head device 10, roughly divided, three inkjet heads 11 </ b> H to 13 </ b> H are mounted. As shown in FIG. 3, the arrangement positions of the first inkjet head 11H, the second inkjet head 12H, and the third inkjet head 13H are shifted along the X direction. In addition, as shown in FIG. 3, the first ink jet head 11H, the second ink jet head 12H, and the third ink jet head 13H are arranged at different positions along the Y direction. That is, the inkjet heads 11H to 13H are arranged in a so-called staggered arrangement.

  The first inkjet head 11H includes a cyan ink nozzle 10 (C) for discharging cyan ink, a magenta ink nozzle 10 (M) for discharging magenta ink, and a yellow ink nozzle 10 (Y for discharging yellow ink). ) And a black ink nozzle 10 (K) for discharging black ink. The order and number of the nozzles 10 (C), 10 (M), 10 (Y), and 10 (K) are not limited to those shown in FIG. Each of the inks ejected from these nozzles is a colored ink used for forming the colored layer 3 (colored layer portion 53) shown in FIG.

  The second inkjet head 12H is provided with a white ink nozzle 10 (W) for discharging white ink (W). This white ink (W) is an ink used for forming the light reflecting layer 1 (a part 51 of the light reflecting layer) shown in FIG.

  The third inkjet head 13H is provided with a transparent ink nozzle 10 (CL) that discharges the transparent ink (CL). This transparent ink (CL) is used to form the first transparent layer 2 (first transparent layer portion 52) and the second transparent layer 4 (second transparent layer portion 54) shown in FIG. This is the ink used.

  The inkjet head device 10 is provided so that the lower surface shown in FIG. 3 faces the layer 50a being formed. Further, the inkjet head device 10 can reciprocate in the X direction, and ejects ink during the movement. Further, the inkjet head device 10 is moved in a predetermined direction in the XYZ coordinate system, or the formation table on which the layer 50a is placed (the formation surface B of the formation table is shown in FIG. 4) is determined in the XYZ coordinate system. The relative position between the inkjet head device 10 and the layer 50a being formed is changed depending on whether the ink is moved in the direction. Either movement may be performed.

  Here, each ink is an ultraviolet curable ink. Therefore, it is necessary to irradiate the discharged ink with ultraviolet rays. The ultraviolet irradiator may be mounted on the inkjet head device 10 or may be configured separately. By irradiating with ultraviolet rays, the ink is cured and finally each layer 50a shown in FIG. 2 is formed.

  Below, the manufacturing process of the molded article 50 performed using this inkjet head apparatus 10 is demonstrated using FIG.

  First, the first layer 50a (described as the first layer 50a (1)) is formed on the formation surface B of the forming table.

  In the formation (manufacturing) process of the first layer 50a (1), each ink is ejected from the ink-jet head device 10 at a predetermined timing using an ink-jet method, and is centered from the end side of the first layer 50a. To the side, a part of the second transparent layer, a part of the colored layer, a part of the first transparent layer, and a part of the light reflecting layer are formed in this order.

  The process of forming (manufacturing) the first layer 50a (1) will be specifically described with reference to FIGS. 4 (a) to 4 (c).

  In step S1 shown in FIG. 4A, a step of forming the second transparent layer portion 54 using the transparent ink and forming the first transparent layer portion 52 using the transparent ink is performed. In this step, the inkjet head device 10 is moved in the positive direction along the X axis, and the transparent ink is ejected from the transparent ink nozzle 10 (CL) shown in FIG. After forming an ink reservoir of transparent ink by landing at a position to become a portion 54 of the first transparent layer and a position to become a portion 52 of the first transparent layer, the ink reservoir is irradiated with ultraviolet rays and cured. As a result, as shown in FIG. 4A, a first transparent layer portion 52 and a second transparent layer portion 54 are formed.

  Subsequently, in step S2 shown in FIG. 4B, the inkjet head device 10 is moved in the negative direction along the X axis, and white ink (W) as light-reflective ink is whitened at a predetermined timing. An ink reservoir is formed by discharging from the ink nozzle 10 (W), and this is cured by irradiation with ultraviolet rays. Thereby, as shown in FIG.4 (b), the part 51 of a light reflection layer is formed.

  Subsequently, in step S3 shown in FIG. 4 (c), the inkjet head device 10 is moved in the positive direction along the X axis, and the colored layer forming ink composed of the colored ink and the supplementary ink is added to both of them at a predetermined timing. The ink is discharged so that the total amount of ink is constant, and is cured by ultraviolet rays. Here, the predetermined timing refers to the first inkjet head at a position where the colored layer forming ink can be ejected to a region between the first transparent layer portion 52 and the second transparent layer portion 54 formed in step S1. This is the timing when each 11H nozzle is present. At this timing, a predetermined amount of ink droplets are ejected using an ink jet method to form an ink reservoir, which is cured by irradiating it with ultraviolet rays. As a result, as shown in FIG. 4C, a colored layer portion 53 having a desired color tone is formed between the first transparent layer portion 52 and the second transparent layer portion 54.

  Through the steps S1 to S3, the first layer 50a (1) is completed. The first layer 50a (1) has the same form as the top view of the layer 50a shown in FIG. Step S1 and step S2 may be switched in order. Steps S2 and S3 may also be switched in order.

  When the first layer 50a (1) is completed, a new layer 50a (described as the second layer 50a (2)) is formed (stacked) on the first layer 50a (1).

  Here, as shown in FIG. 2, the modeled object 50 of the present embodiment has a gradually increasing size (area) along the XY plane of the layer 50 a that is laminated from the lowest to the middle of the laminate. Thus, when manufacturing the modeling object 50 of a shape which becomes large along a lamination direction regarding a cross section using the inkjet method, the edge part of the upper layer 50a to laminate | stack is already formed of the lower layer 50a. The shape protrudes to the side rather than the end. In order to form a structure that protrudes in this way, a support material layer may be formed.

  FIG. 4D illustrates the step of forming the second layer 50a (2), but the colored layer portion 53 (2) included in the second layer 50a (2) is the first layer. 50a (1) is formed so as to overlap with a portion 54 (1) of the second transparent layer. Thus, since the second layer 50a (2) has a larger size (area) along the XY plane than the first layer 50a (1), the second layer 50a (2) constitutes the end of the second layer 50a (2). The portion 54 (2) of the second transparent layer protrudes laterally from the portion 54 (1) of the second transparent layer constituting the end of the first layer 50a (1). Therefore, the second transparent layer portion 54 (1) of the first layer 50 a (1) is prevented so that the ink to be deposited on the protruding portion does not fall below the protruding portion when forming the protruding portion. The support material 60 is formed on the outer side (side side) than 1).

  It is preferable that the support material 60 can be formed from ink ejected using an inkjet method. Although the support material 60 has such a strength that the layer does not fall even if a layer is formed thereon, the support material 60 is configured by a removable ink because it is a portion that is not included in the molded object 50 in the end. . The ink of the support material 60 is also preferably cured by ultraviolet rays (cured to such an extent that it can be removed in the subsequent process) or water-soluble and can be removed by dissolving in water in the subsequent process.

  The layered product 50 shown in FIG. 2 can be manufactured by repeating the process of laminating the layer 50a in this manner in the X and Y directions to form one layer and then repeating the lamination in the Z direction. In forming a single layer, good modeling and decoration with little unevenness can be obtained by performing known interlace scanning for two-dimensional image formation.

  In the manufacturing method of the present embodiment, the step of forming the second transparent layer portion 54 using the transparent ink, the step of forming the colored layer portion 53 using the colored ink, and the above step using the transparent ink. Forming a part 52 of the first transparent layer, and forming a part 52 of the first transparent layer using an ink having light reflectivity. And the step of forming the second transparent layer portion 54 and then the step of forming the colored layer portion 53 using the colored ink to form the first transparent layer portion 52 and the second transparent layer portion 52. A colored layer portion 53 is formed between the transparent layer portion 54 and the transparent layer portion 54. Thereby, when the part 54 of the second transparent layer forms the part 53 of the colored layer, it functions as an outer moat of the ink reservoir constituting the colored layer, and there is no risk that the ink constituting the colored layer will undesirably spread out. The colored layer portion 53 can be formed with high accuracy.

  A further advantage of forming the second transparent layer portion 54 will be described with reference to FIGS. 6 and 7. FIG. 6 is a view obtained by removing the support material from the view of FIG. FIG. 7 is a cross-sectional view of a modeled object having a comparative configuration. The modeled object of the comparative configuration is the same as the modeled object 50 of the present embodiment in that it is formed by the lamination method, but each layer of the comparative structure is a part of the first transparent layer in the modeled object 50 of the present embodiment. There is no portion corresponding to 52 and a portion 54 of the second transparent layer. That is, the modeled object having the comparative configuration is an aspect in which the light reflecting layer is directly coated with the colored layer. Also in this comparative configuration, the problem occurring in the comparative configuration will be described assuming that the upper layer has a larger size (area) along the XY plane than the lower layer.

  In the comparative structure shown in FIG. 7, the end of the upper layer is constituted by the colored layer 152 (2), and this colored layer 152 (2) is more than the colored layer 152 (1) constituted at the end of the lower layer. Jumping out to the side. For this reason, when the ink for forming the colored layer is ejected to form the protruding portion, the ink may drop below the coloring position.

  Since the color tone of the modeled object is exhibited by the colored layer, if the ink constituting the colored layer falls, the color tone of the modeled object may change from a predetermined color tone.

  On the other hand, the modeled object 50 of this embodiment shown in FIG. 6 forms a part 54 of the second transparent layer at the end of each layer 50a. In FIG. 6, even if the ink for constituting the second transparent layer portion 54 falls, it is the colored layer that determines the color tone, so the color tone is not affected. Therefore, according to the present embodiment, it is possible to manufacture a highly reliable model 50 that exhibits a desired color tone.

  There are other benefits. For example, if a portion 54 of the second transparent layer is formed in the first layer 50a (1), it is possible to secure a wide range (formation allowable region) in which the colored layer included in the second layer 50a (2) can be formed. There is a merit. Thereby, the precision of manufacture becomes somewhat loose, and it can contribute to the improvement of manufacturing efficiency.

  Note that the merit that a wide formable region can be secured is achieved even when the second transparent layer portion 54 is formed after the colored layer portion 53. Accordingly, the present invention includes an embodiment in which the second transparent layer portion 54 is formed after the colored layer portion 53.

  Moreover, since the modeled object 50 of this embodiment becomes the form which coated the surface of the colored layer 3 with the 2nd transparent layer 4, the 2nd transparent layer 4 also has a function as a protective layer of the colored layer 3. ing.

  In FIG. 4, the case where a layer having a larger size (area) along the XY plane than the lower layer is stacked has been described. This can be said to relate to the production of the lower half of the structure 50 in FIG.

  Although the manufacturing method described above can be basically applied to the manufacturing of the upper half structure when the modeled object in FIG. 1 is divided into two parts, the upper half of the modeled object 50 is manufactured as shown in FIG. The upper colored layer is provided closer to the center side of the layer 50a than the lower colored layer, and a portion 53 of the upper colored layer is superimposed on a portion 52 of the lower first transparent layer. ing. Further, a part 54 of the upper second transparent layer is superimposed on a part 53 of the lower colored layer.

  Further, as shown in FIG. 2, in the upper half of the model 50, the lower layer has a larger size (area) along the XY plane than the layer to be stacked. For this reason, there is almost no possibility that the ink constituting the upper colored layer falls. In addition, when manufacturing this upper half, it is not necessary to form a support material.

  The modeled object of the present embodiment shown in FIG. 2 includes a first transparent layer portion 52, a colored layer portion 53, and a second layer in the lowermost layer and its neighboring layers, and the uppermost layer and its neighboring layers. A layer consisting of only a part 54 of the transparent layer, a layer consisting only of a part 53 of the colored layer and a part 54 of the second transparent layer, and a layer consisting only of the part 54 of the second transparent layer. . With such a laminated structure, it is possible to realize a structure in which the entire surface of the model is covered with the second transparent layer 4, the colored layer 3, and the first transparent layer 2. However, this invention is not limited to this, For example, it is good also as a structure where a 2nd transparent layer, a colored layer, and a 1st transparent layer are not included in the upper surface and lower surface of a molded article.

[8] Modification (Modification 1)
It can be said that the molded object 50 of the present embodiment has the first transparent layer 2, the colored layer 3, and the second transparent layer 4 formed along the surface shape of the light reflecting layer 1. However, this invention is not limited to this, For example, the shape of the molded article shown in FIG. 8 may be sufficient.

  The shape of the shaped object shown in FIGS. 8A to 8D is obtained by utilizing the fact that the end of each layer 50a (FIG. 2) is a portion 54 of the second transparent layer. The shape of the second transparent layer 4 is not the shape along the surface shape of the light reflecting layer 1, and the second transparent layer 4 is formed as shown in FIGS. It is good also as a desired shape including the colored layer 3, the 1st transparent layer, and the structure which consists of a light reflection layer.

  The aspect which includes the modeled object in the second transparent layer 4 as in Modification 1 may be carried out when the modeled object is a mechanically weak structure. In other words, it is effective for modeling legs and wings for insects, flower stems and petals. When living things and plants are used as specimens and decorations, they can be returned to nature as they are by taking them in with a 3D scanner. Furthermore, since the above-mentioned support material is unnecessary, no waste material is generated and the system is naturally friendly.

  8A, the second transparent layer 4 forms a hexahedron, and has a spherical structure composed of the colored layer 3, the first transparent layer, and the light reflecting layer. . The entire structure shown in FIG. 8A can be manufactured using the same manufacturing method as in FIG.

  A model 50 shown in FIG. 8B has a structure in which a second transparent layer 4 includes a doll composed of the colored layer 3, the first transparent layer, and the light reflecting layer. The transparent layer 4 is a stationary-type shaped object 50 having a shape that allows the entire shaped object to stand on its own. This stationary type shaped object 50 can also be manufactured (produced) using the manufacturing method described in the above-described embodiment.

  A model 50 shown in FIG. 8C has a structure in which the second transparent layer 4 includes a doll composed of the colored layer 3, the first transparent layer, and the light reflecting layer. This is a strap-type shaped article 50 in which a hole 70 is formed in a part of the transparent layer 4. For example, it can be realized as a strap or key chain attached to a mobile phone. The hole 70 may be formed in a part of the second transparent layer 4 at the same time as the outer shape is formed by the second transparent layer 4. If a hole is formed in the second transparent layer 4, there is an advantage that it is not necessary to make a hole in the doll itself composed of the colored layer 3, the first transparent layer, and the light reflecting layer.

  The model 50 shown in FIG. 8D has a structure in which the second transparent layer 4 includes the upper body portion of the doll composed of the colored layer 3, the first transparent layer, and the light reflecting layer. This is a model 50 in which a decorative three-dimensional image 71 configured by a mark, a frame, a light color, or the like is applied on the surface of the second transparent layer 4 or inside the second transparent layer 4. Further, the shaped object 50 is provided with a character area 72 for writing characters such as a date, a person name, or a place name on the surface of the second transparent layer 4 or inside the second transparent layer 4. The decorative three-dimensional image 71 and the character area 72 may be formed at the same time as the outer shape is formed by the second transparent layer 4. In addition to the decorative three-dimensional image 71 and the character area 72, other additional information may be formed on the surface of the second transparent layer 4 or inside the second transparent layer 4.

  In FIGS. 8B to 8D, the integrated doll is included in the second transparent layer 4, but the number of dolls included in the second transparent layer 4 is limited to this. It is not a thing.

  In addition, when the molded article concerning this invention has a ring shape, a colored layer can be provided not only in the outer peripheral end part vicinity of a ring but in an inner peripheral end part vicinity. In short, a colored layer can be provided on the surface of the modeled article, and a second transparent layer can be provided on the colored layer.

  In addition, the second transparent layer 4 is not formed in a desired shape as in the present modification, but the second transparent layer 4 is shaped along the surface shape of the light reflecting layer 1 as in the above embodiment. It may be formed as follows, and the obtained shaped article may be enclosed in a resin of an arbitrary shape.

(Modification 2)
In the said embodiment, although the molded article 50 is manufactured using the inkjet head apparatus 10 shown in FIG. 3, the inkjet head apparatus to be used is not limited to this, The inkjet head apparatus shown to FIG. 9 to FIG. 12, respectively. It is also possible to use.

  FIG. 9 is a view showing a modification of the ink jet head device, and corresponds to FIG. On the lower surface of the inkjet head device 10 'shown in FIG. 9, two inkjet heads 11H' and 12H 'are roughly divided. As shown in FIG. 9, the first inkjet head 11H ′ and the second inkjet head 12H ′ are displaced from each other along the X direction, and are displaced from each other along the Y direction. . The first inkjet head 11H ′ is the same as the first inkjet head 11H shown in FIG. The second inkjet head 12H ′ is provided with a white ink nozzle 10 (W) that discharges a white ink (W) that is an ink used to form the light reflecting layer 1 (a part 51 of the light reflecting layer). In addition, a transparent ink nozzle 10 (CL) for discharging the transparent ink (CL) is provided.

  FIG. 10 is a view showing still another modified example of the ink jet head device, and corresponds to FIG. In the ink jet head device 10a shown in FIG. 10, a cyan ink nozzle 10 (C), a magenta ink nozzle 10 (M), a yellow ink nozzle 10 (Y), a black ink nozzle 10 (K), The white ink nozzles 10 (W) and the transparent ink nozzles 10 (CL) are arranged in this order in the X direction.

  FIG. 11 is a view showing still another modified example of the ink jet head device, and corresponds to FIG. In the inkjet head device 10b shown in FIG. 11, a white ink nozzle 10 (W), a transparent ink nozzle 10 (CL), a yellow ink nozzle 10 (Y), a magenta ink nozzle 10 (M), The cyan ink nozzle 10 (C), the black ink nozzle 10 (K), the transparent ink nozzle 10 (CL), and the white ink nozzle 10 (W) are arranged in this order in the X direction. Is provided.

  FIG. 12 is a view showing still another modified example of the ink jet head device. The inkjet head device 10b shown in FIG. 12 includes a carriage 21 that can reciprocate along the X axis, a plurality of nozzle rows mounted on the carriage 21, and ultraviolet irradiators 24a and 24b mounted on the carriage 21. . The carriage 21 is moved in the Y direction, and ultraviolet curable ink is ejected from the nozzle rows, and scanning is performed to irradiate ultraviolet rays from the ultraviolet irradiators 24a and 24b.

  The plurality of nozzle rows are provided along the X direction as shown in FIG. 12, and the cyan ink nozzle row C, the magenta ink nozzle row M, and the yellow ink are arranged from the left side to the right side in the X direction. The nozzle row Y for black, the nozzle row K for black ink, the nozzle row W for white ink, and the nozzle row CL for transparent ink are arranged in this order. Since each of the plurality of nozzle rows is mounted on the carriage 21, it is possible to discharge ultraviolet curable ink when moving in the X direction as the carriage 21 moves.

  In FIG. 10, FIG. 11 and FIG. 12, since all the nozzles are arranged in the X direction, it is possible to form a layer by ejecting all ink in one layer by a single movement in the X direction. . In FIG. 12, UV irradiation is performed simultaneously with ink ejection by a single movement in the X direction, so that further curing in the case of ultraviolet curable ink can be performed at the same timing as ejection.

[Additional Notes]
The modeled object 50 according to one aspect of the present invention includes a light reflecting layer 1 formed from an ink having light reflectivity, a colored layer 3, and a second transparent layer 4 formed from a transparent ink. The colored layer 3 is formed outside the light reflecting layer 1, and the second transparent layer 4 is formed outside the colored layer 3.

  According to said structure, compared with the case where the layer in which the part 54 of the 2nd transparent layer is not formed in the edge part side rather than the part 53 of a coloring layer is laminated | stacked, it will be contained in the upper layer to laminate | stack. Not only the region where the color layer portion 53, 53 (2) can be formed overlaps the color layer portion 53, 53 (1) included in the lower layer to be laminated, but also the second transparent layer portion 54, By including a region overlapping with 54 (2), a wide area can be secured. Thereby, the precision of manufacture becomes somewhat loose, and it can contribute to the improvement of manufacturing efficiency.

  The manufacturing method of the modeled object 50 according to one aspect of the present invention is a manufacturing method for manufacturing the modeled object 50 by laminating a plurality of layers 50 a, and the modeled object 50 is from the surface layer side of the modeled object 50. Inwardly, it is a shaped article 50 having a second transparent ink layer 4 formed from transparent ink and a colored layer 3 in this order, and as two or more layers 50a of the plurality of layers 50a, And a layer forming step of forming a layer 50a having a part 54 of the second transparent layer and a part 53 of the colored layer in this order from the end side to the center side of each layer 50a. It is characterized by.

  According to the above configuration, the second transparent layer portion 54 is formed on the end side of the colored layer portion 53, so that the second transparent layer portion 54 is configured in the manufacturing process. Even if the ink falls from a position where the second transparent layer portion 54 is to be formed, the color tone is determined by the colored layer 3 (colored layer portion 53), and thus the color tone is not affected. Therefore, it is possible to manufacture a highly reliable model 50 that exhibits a desired color tone (decoration).

  Moreover, according to said structure, it is contained in the upper layer laminated | stacked compared with the case where the layer in which the part 54 of the 2nd transparent layer is not formed in the edge part side rather than the part 53 of a colored layer is laminated | stacked. A part of the second transparent layer is formed not only in a region where the part 53, 53 (2) of the colored layer to be formed overlaps the part 53, 53 (1) of the colored layer included in the lower layer to be laminated. By including a region overlapping with 54, 54 (2), it can be secured widely. Thereby, the precision of manufacture becomes somewhat loose, and it can contribute to the improvement of manufacturing efficiency.

  In one aspect of the method for manufacturing a shaped article according to the present invention, in addition to the above configuration, the layer forming step includes a step of forming a part 54 of the second transparent layer, and a part 53 of the colored layer. A step of forming the second transparent layer portion 54 before the step of forming the colored layer portion 53 is performed.

  According to the above configuration, since the second transparent layer portion 54 is formed before the colored layer portion 53 with respect to the certain layer 50a, the second transparent layer portion 54 is formed on the colored layer. It functions as an outer moat for the portion 53 of the colored layer when the portion 53 is formed. Thereby, there is no possibility that the ink forming the part 53 of the colored layer may be undesirably spread or dropped.

  Further, in one aspect of the method for manufacturing a shaped article according to the present invention, in addition to the above configuration, the new layer 50a is formed on the layer 50a formed by the layer forming step. A portion 53 of the colored layer included in the layer 50a is formed so as to overlap the portion 54 of the second transparent layer of the lower layer 50a.

  Further, in one aspect of the method for manufacturing a shaped article according to the present invention, in addition to the above configuration, the new layer 50a is formed on the layer 50a formed by the layer forming step. A part 54 of the second transparent layer included in the layer 50a is formed so as to overlap the part 53 of the colored layer of the lower layer 50a.

  The present invention is not limited to the above-described embodiments and modifications, and various modifications are possible within the scope shown in the claims, and the technical means disclosed in the embodiments and modifications are appropriately combined. The obtained embodiment is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means respectively disclosed in the embodiment and the modification.

  INDUSTRIAL APPLICABILITY The present invention can be used in a method for manufacturing a three-dimensional model and a manufacturing apparatus for realizing the method, and can provide a three-dimensional model having a desired decoration such as full color.

DESCRIPTION OF SYMBOLS 1 Light reflection layer 2 1st transparent layer 3 Colored layer (decorative layer)
4 Second transparent layer (transparent layer)
10, 10 ', 10a, 10b Inkjet head device 10 (Y) Yellow ink nozzle 10 (C) Cyan ink nozzle 10 (K) Black ink nozzle 10 (M) Magenta ink nozzle 10 (CL) For transparent ink Nozzle 10 (W) White ink nozzle 11H 1st inkjet head 12H 2nd inkjet head 13H 3rd inkjet head 21 Carriage 24a, 24b Ultraviolet irradiator 50 Modeling object 50a Layer 51 Part of light reflecting layer 52 First transparent ink layer Part of 53 Part of colored layer (Part of decorative layer)
54 Part of second transparent layer (part of transparent layer)
60 Support material

Claims (4)

A manufacturing method for manufacturing a shaped article by laminating a plurality of layers,
The shaped article is provided with a light reflecting layer formed from an ink having light reflectivity, a decorative layer, and a transparent layer formed from a transparent ink, and the decorative layer is formed of the light reflecting layer. It is formed on the outside, and the transparent layer is a shaped article formed on the outside of the decorative layer,
As two or more layers of the plurality of layers, a layer having a part of the transparent layer and a part of the decorative layer in this order from the end side to the center side of each layer is formed. The manufacturing method of the molded article characterized by including the layer formation process to perform. In the layer forming step,
Forming a part of the transparent layer;
And forming a part of the decorative layer,
The method for producing a shaped article according to claim 1 , wherein a step of forming a part of the transparent layer is performed before the step of forming a part of the decorative layer. When forming a new layer on the layer formed by the layer forming step, a part of the decorative layer included in the new layer is placed on a part of the transparent layer of the lower layer. method of producing a molded article according to claim 1 or 2, characterized in that to form superimposed. When forming a new layer on the layer formed by the layer forming step, a part of the transparent layer included in the new layer is placed on a part of the decorative layer of the lower layer. method of producing a molded article according to claim 1 or 2, characterized in that to form superimposed.

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