WO2019124150A1

WO2019124150A1 - Additive layer manufacturing method

Info

Publication number: WO2019124150A1
Application number: PCT/JP2018/045378
Authority: WO
Inventors: 大輝栗原; 橋本　将臣; 泰成小松
Original assignee: 株式会社エンプラス
Priority date: 2017-12-18
Filing date: 2018-12-11
Publication date: 2019-06-27

Abstract

[Problem] To provide an additive layer manufacturing method such that even when a three-dimensional structure with micropores is manufactured using three-dimensional CAD data as is, the micropores are not clogged with excess cured substance. [Solution] The method is configured so as to produce a three-dimensional structure 1 with micropores 4 by layering resin layers (2, 3) that have been cured by photoirradiation. The three-dimensional structure 1 has micropore-forming resin layers 2 in which micropores 4 are formed and non-micropore-forming resin layers 3 in which micropores 4 are not formed. In the non-micropore-forming resin layers 3, spaces 6 are formed along the layering direction of the resin layers (2, 3) such that when the shape of a micropore 4 projected onto an imaginary plane 7 that is parallel to the layering surface is called a projected micropore shape, the projected shape of the space 6 onto the imaginary plane 7 is larger than the projected micropore shape and has a size that encompasses the entire projected micropore shape.

Description

Additive manufacturing method

The present invention relates to an additive manufacturing method suitable for producing a three-dimensional structure having fine holes.

Photolithography, which is one of the lamination molding methods conventionally known, irradiates light (for example, laser light) to a liquid photocurable resin in a container in a curing step, and the molding table is irradiated with light The upper (or lower) one layer of the photocurable resin is cured, and then the shaping table is moved to move the second layer of light on (or below) the first photocurable resin cured. Supply a curable resin, irradiate the light to the second layer liquid photo-curable resin, cure the second layer photo-curable resin exposed to the light, repeat such work to the N layer To form a desired light figure (three-dimensional structure).

FIG. 16 is a view showing a photofabricated object 100 having fine holes 101 formed by the conventional photofabrication method. FIG. 16A is a plan view of the photofabricated object 100 having the minute holes 101. FIG. 16 (b) is a cross-sectional view of the photofabricated object 100 having the micro holes 101 shown by cutting along the A14-A14 line of FIG. 16 (a). Further, FIG. 16C is a cross-sectional view of the photofabricated object 100 having the micro holes 101 showing a state in which the micro holes 101 are closed with the excess cured material 102.

As shown in FIG. 16, in the photofabricated object 100 having the micro holes 101 formed by the photofabrication method, the excess cured material 102 is formed in the micro holes 101, and the micro holes 101 are blocked with the excess cured material 102. May occur.

Therefore, as a technique for preventing the occurrence of such a defect that the fine holes 101 are blocked by the excess cured material 102, an optical shaping method of the photofabricated object 200 having the fine holes 201 as shown in FIG. 17 has been developed. . In the stereolithography method shown in FIG. 17, contour line data for stereolithography in which the three-dimensional CAD data of the stereolithography object 200 is rotated by 90 ° so that the direction in which the minute holes 201 extend is parallel to the lamination surface (first It is converted into slice data of the layer to the Nth layer, and modeling is sequentially advanced from the first layer to the Nth layer based on the contour line data (see Patent Document 1).

Japanese Patent Application Publication No. 2003-245982

However, although the micro holes 201 formed based on the contour line data for photofabrication are prevented from being blocked by the excess cured product, the excess cured material is easily accumulated in the stacking direction, so the perfect circle of the micro holes 201 The problem is that the degree decreases.

Therefore, it is an object of the present invention to provide a layered manufacturing method in which micro holes are not clogged with excess hardened material even if they are shaped using three-dimensional CAD data of a three-dimensional structure having micro holes as it is. Do.

The present invention relates to an additive manufacturing method in which resin layers (2, 3) cured by light irradiation are stacked to produce a three-dimensional structure 1 having fine holes 4. In the present invention, the three-dimensional structure 1 has a micropore-forming resin layer 2 in which the micropores 4 are formed, and a micropore non-forming resin layer 3 in which the micropores 4 are not formed. When the micro-hole non-forming resin layer 3 has the micro-hole projection shape in which the micro-hole 4 is projected onto the virtual plane 7 parallel to the lamination surface, the micro-hole projection shape is the micro-hole projection A space 6 which is larger than the shape and whose size projected onto the virtual plane 7 includes all of the projected shapes of fine holes is along the stacking direction of the resin layers (2, 3). It is formed.

The present invention also relates to a lamination molding method in which resin layers 2 a cured by light irradiation are stacked to produce a three-dimensional structure 1 having fine holes 4.
In the present invention, the three-dimensional structure 1 is
When the first resin layer 2a to the nth resin layer 2a are stacked from the top to the bottom, micro holes 4 are formed in the upper resin layer 2a, and then the upper resin layer 2a is stacked. A space 6 is formed at a position opposed to the fine holes 4 of the lower resin layer 2a.
When the first resin layer 2a to the nth resin layer 2a are stacked from the bottom to the top, micro holes 4 are formed in the lower resin layer 2a, and then the lower resin layer 2a is stacked. A space 6 is formed at a position facing the fine hole 4 of the upper resin layer 2a.
Then, the space 6 is such that the projected shape on the virtual plane 7 parallel to the lamination surface of the resin layer 2 a is larger than the projected shape of the fine holes, which is the shape of the projected microhole 4 on the virtual plane 7. It is formed, and it is formed so that the projection shape to the said virtual plane 7 may become a magnitude | size containing all of the said fine hole projection shape.

According to the layered manufacturing method according to the present invention, even if the three-dimensional CAD data of the three-dimensional structure having fine holes are used as it is, the fine holes are not blocked by the excess cured material, and high precision is achieved. It is possible to easily create a three-dimensional structure having fine holes of.

It is a figure which shows the optical modeling thing (three-dimensional structure) formed of the optical shaping method (lamination modeling method) which concerns on 1st Embodiment of this invention, FIG. 1 (b) is a front view of the optically shaped article, and FIG. 1 (c) is a cross-sectional view of the optically shaped article cut along the line A1-A1 of FIG. 1 (a). It is a figure for demonstrating the hardening process of the optical shaping method which concerns on 1st Embodiment of this invention. It is a figure for demonstrating post-processing of the hardening process of the stereolithography method which concerns on 1st Embodiment of this invention, FIG. 3 (a) is a figure of the 1st process for implementing post-processing, FIG. b) is a diagram of a second step for carrying out post-treatment, and FIG. 3 (c) is a diagram of a third step for carrying out post-treatment. It is a figure for demonstrating the 1st modification of the optical shaping method which concerns on 1st Embodiment of this invention, and Fig.4 (a) is a top view of the optical shaping thing formed by the optical shaping method which concerns on this modification. 4 (b) is a front view of an optical object formed by the optical forming method according to this modification, and FIG. 4 (c) is a light which is cut along line A2-A2 of FIG. 4 (a). It is a sectional view of a modeling thing. It is a figure for demonstrating the 2nd modification of the optical shaping method which concerns on 1st Embodiment of this invention, and Fig.5 (a) is a top view of the optical shaping thing formed by the optical shaping method which concerns on this modification. Fig. 5 (b) is a front view of an optical object formed by the optical forming method according to the present modification, and Fig. 5 (c) is a light which is cut along line A3-A3 of Fig. 5 (a). It is a sectional view of a modeling thing. It is a figure for demonstrating the 3rd modification of the optical shaping method which concerns on 1st Embodiment of this invention, and Fig.6 (a) is a top view of the optical shaping thing formed of the optical shaping method which concerns on this modification. 6 (b) is a front view of an optical object formed by the optical forming method according to the present modification, and FIG. 6 (c) is a light which is cut along line A4-A4 in FIG. 6 (a). FIG. 6 (d) is an enlarged view of a portion B of FIG. 6 (c). FIG. 7A is a plan view of an optical object formed by the optical forming method according to the present embodiment, and FIG. 7A is a view showing the optical object formed by the optical forming method according to the second embodiment of the present invention; Fig. 7 (b) is a front view of an optical three-dimensional object formed by the optical forming method according to the present embodiment, and Fig. 7 (c) is an optical forming shown by cutting along line A5-A5 of Fig. 7 (a). FIG. 7D is a back view of a photofabricated object formed by the photofabrication method according to the present embodiment. It is a figure for demonstrating the 1st modification of the optical shaping method which concerns on 2nd Embodiment of this invention, and Fig.8 (a) is a top view of the optical shaping thing formed of the optical shaping method which concerns on this modification. FIG. 8 (b) is a front view of an optical object formed by the optical forming method according to the present modification, and FIG. 8 (c) is a light which is cut along line A6-A6 of FIG. 8 (a). FIG. 8 (d) is a back view of an optical object formed by the optical forming method according to the present modification. It is a figure for demonstrating the 2nd modification of the optical shaping method which concerns on 2nd Embodiment of this invention, and Fig.9 (a) is a top view of the optical shaping thing formed by the optical shaping method which concerns on this modification. Fig. 9 (b) is a front view of an optical object formed by the optical forming method according to the present modification, and Fig. 9 (c) is a light cut along line A7-A7 in Fig. 9 (a). FIG. 9 (d) is a back view of an optical object formed by the optical forming method according to the present modification. It is a figure for demonstrating the 3rd modification of the optical shaping method which concerns on 2nd Embodiment of this invention, and Fig.10 (a) is a top view of the optical shaping thing formed of the optical shaping method which concerns on this modification. FIG. 10 (b) is a front view of an optical object formed by the optical forming method according to the present modification, and FIG. 10 (c) is a light which is cut along line A8-A8 in FIG. 10 (a). FIG. 10 (d) is a back view of an optical object formed by the optical forming method according to the present modification. It is a figure for demonstrating the 4th modification of the optical shaping method which concerns on 2nd Embodiment of this invention, and Fig.11 (a) is a top view of the optical shaping thing formed by the optical shaping method which concerns on this modification. FIG. 11 (b) is a front view of an optical three-dimensional object formed by the optical forming method according to the present modification, and FIG. 11 (c) is a light shown by cutting along line A9-A9 in FIG. FIG. 11D is a cross-sectional view of a shaped object, and FIG. 11D is a back view of the optically shaped object formed by the optical shaping method according to the present modification. It is a figure for demonstrating the 5th modification of the optical shaping method which concerns on 2nd Embodiment of this invention, and Fig.12 (a) is a top view of the optical shaping thing formed by the optical shaping method which concerns on this modification. 12 (b) is a front view of an optical object formed by the optical forming method according to the present modification, and FIG. 12 (c) is a light which is cut along line A10-A10 in FIG. 12 (a). FIG. 12 (d) is a back view of an optical object formed by the optical forming method according to the present modification. It is a figure for demonstrating the 6th modification of the optical shaping method which concerns on 2nd Embodiment of this invention, and Fig.13 (a) is a top view of the optical shaping thing formed of the optical shaping method which concerns on this modification. Fig. 13 (b) is a front view of an optical object formed by the optical forming method according to the present modification, and Fig. 13 (c) is a light which is cut along the line A11-A11 in Fig. 13 (a). FIG. 13D is a cross-sectional view of a shaped object, and FIG. 13D is a back view of the optically shaped object formed by the optical shaping method according to the present modification. It is a figure which shows the optical modeling thing formed by the optical modeling method which concerns on 3rd Embodiment of this invention, FIG. 14 (a) is a top view of the optical modeling thing formed by the optical modeling method which concerns on this embodiment, FIG. 14 (b) is a cross-sectional view of the photofabricated object taken along line A12-A12 of FIG. 14 (a). It is a figure which shows the optical shaping thing formed by the optical shaping method which concerns on 4th Embodiment of this invention, FIG. 15 (a) is a top view of the optical shaping thing formed by the optical shaping method which concerns on this embodiment, FIG. 15 (b) is a cross-sectional view of the photofabricated object taken along line A13-A13 of FIG. 15 (a). It is a figure which shows the optical modeling thing which has a micro hole formed by the conventional optical modeling method, FIG. 16 (a) is a top view of the optical modeling thing which has a micro hole, FIG.16 (b) is FIG. FIG. 16 (c) is a cross-sectional view of the photofabricated article having a microhole cut along the A14-A14 line of FIG. It is a figure explaining the modeling method of the optical modeling thing which has the conventional micro hole.

First Embodiment
Hereinafter, a first embodiment of the additive manufacturing method according to the present invention will be described in detail based on the drawings. In the present embodiment, the photo-forming method of the layer-by-layer forming method will be described.

(Photofabricated object)
FIG. 1 is a view showing an optical three-dimensional object (three-dimensional structure) 1 formed by the optical forming method according to the present embodiment. FIG. 1A is a plan view of the photofabricated object 1. Further, FIG. 1 (b) is a front view of the photofabricated object 1. FIG. 1C is a cross-sectional view of the light structure 1 taken along the line A1-A1 in FIG. 1A.

As shown in FIG. 1, the photofabricated object 1 is formed by stacking a plurality of resin layers (first to n-th layers) cured by light irradiation, and the upper end of the photofabricated object 1 along the stacking direction (-Z direction) The layer (first layer) and the layer at the lower end (n-th layer) are the micropore-forming resin layer 2, and the layers (second to n-1th layers) other than the micropore-forming resin layer 2 are fine It is a hole non-forming resin layer 3. The shape of the photofabricated object 1 in plan view is a rectangular parallelepiped.

The fine hole-forming resin layer 2 of the first layer and the fine hole-forming resin layer 2 of the n-th layer have nine fine holes 4 of the same size at equal intervals (with the same pitch p) in a matrix of three rows and three columns. It is formed. The fine holes 4 of the fine hole forming resin layer 2 of the first layer penetrate the fine hole forming resin layer 2 of the first layer along the central axis 5 extending in parallel with the stacking direction. The fine holes 4 of the fine hole forming resin layer 2 of the nth layer penetrate the fine hole forming resin layer 2 of the nth layer along the central axis 5 extending in parallel with the stacking direction. And the minute holes 4 of the minute hole forming resin layer 2 of the first layer and the minute holes 4 of the minute hole forming resin layer 2 of the nth layer correspond one-on-one with the central axis 5 extending parallel to the laminating direction as an axis. It is formed to be.

The fine hole non-forming resin layer 3 corresponds to the fine holes 4 formed in the fine hole forming resin layer 2 of the first layer on a one-to-one basis, and the fine holes formed in the fine hole forming resin layer 2 of the nth layer A space 6 is formed in one-to-one correspondence with the hole 4. The space 6 formed in the fine hole non-forming resin layer 3 is formed in a cylindrical shape having a central axis 5 extending in parallel with the stacking direction as an axis, and a virtual plane (X- If the shape (circle) projected on Y plane) 7 is the micro hole projection shape, the projection shape (space projection shape) on virtual plane 7 parallel to the stacking plane is formed larger than the micro hole projection shape (circle) The projection shape (space projection shape) onto the virtual plane 7 parallel to the stacking plane is formed in a shape (circle) of a size including all of the micro hole projection shapes. That is, the area of the shape in which the space 6 is projected onto the virtual plane 7 parallel to the stacking plane is larger than the area of the shape onto which the micro holes 4 are projected onto the virtual plane 7 parallel to the stacking plane. Then, the fine holes 4 of the fine hole forming resin layer 2 of the first layer and the fine holes 4 of the fine hole forming resin layer 2 of the nth layer are opened in the space 6 of the fine hole non-forming resin layer 3. There is.

The photofabricated object 1 having the above structure has the hole diameter d1 of the minute hole 4 of the minute hole forming resin layer 2 of the first layer and the hole diameter dn of the minute hole 4 of the nth layer. Are equal, and d1 = dn = 0.1 mm. Moreover, the diameter d of the space 6 of the photofabricated object 1 is 0.30 mm. And this optical model 1 is 0.5 mm in pitch p of

adjacent minute holes

4 and 4, and plate thickness (thickness along the lamination direction from the 1st layer to the n-th layer) t is 1 mm. Layer thickness t of the first layer microhole-forming resin layer 2 (thickness of the first layer along the stacking direction) t is 0.05 mm, and the layer thickness tn of the microhole-forming resin layer 2 of the nth layer Is 0.05 mm. In addition, the dimension of each part of such an optical modeling thing 1 is an example for making it easy to understand the optical modeling method which concerns on this embodiment, and the optical modeling thing 1 manufactured by the optical modeling method, and this invention There is no limitation on the stereolithography method (laminated modeling method) and the stereolithography object (three-dimensional structure) 1 according to the present invention.

(Curing process of stereolithography)
FIG. 2 is a view showing a curing process of the optical forming method according to the embodiment of the present invention. As shown in FIG. 2, in the optical forming method according to the present embodiment, a liquid photocurable resin 10 (for example, an epoxy resin or an acrylate resin) is placed in a container 8 and the inside of the container 8 is moved up and down The liquid photocurable resin layer 10 for one layer is positioned below the support 12 of the table 11 (FIG. 2A). In FIG. 2, in the 3D printer (laminated modeling apparatus) 13 used for the photofabrication method, when 3D data (three-dimensional CAD data) 14 corresponding to the photofabricated object 1 is input to the CPU (control controller) 15 The input 3D data 14 is processed by operation control software in the controller 15, and a control signal is output from the controller 15 to the first stepping motor 16 for raising and lowering the modeling table 11, and from the controller 15 A control signal is output to the second stepping motor 20 serving as a driving unit of the movement guiding means 18 of the light irradiating means 17, and the controller 15 controls the irradiation of the light 21 (for example, laser light) to the light irradiating means 17. Control signals are output.

Next, in the photofabrication method according to the present embodiment, the liquid photocurable resin 10 located under the support 12 of the molding table 11 is irradiated with the light 21 from the light irradiation means 17, and the light 21 strikes it. The light curable resin layer 10a1 is cured (FIG. 2 (b)). Thereby, the micropore-forming resin layer 2 as a first layer having a plurality of micropores 4 is formed.

Next, the optical shaping method according to the present embodiment raises the shaping table 11 and supplies the second layer of the liquid photocurable resin 10 under the cured first layer of the photocurable resin layer 10a1. The second liquid photocurable resin 10 is irradiated with light 21 to cure the second photocurable resin layer 10a2 which the light 21 strikes (FIG. 2 (c)). Thereby, the micropore non-forming resin layer 3 which is the second layer is formed. In the micropore non-forming resin layer 3 which is the second layer, a part of the space 6 is formed so as to correspond to the micropores 4 of the micropore forming resin layer 2 of the first layer one by one.

Next, in the optical shaping method according to the present embodiment, the same operation as the formation of the micropore non-forming resin layer 3 which is the second layer is repeated to the n-1th layer, and the second to n-1th layers are formed. The fine hole non-forming resin layer 3 is integrally formed under the fine hole forming resin layer 2 of the first layer to form a cylindrical space 6 having a hole diameter larger than that of the fine holes 4. In the step of forming the second to (n-1) th minute layer non-perforated resin layers 3, the outline (inner peripheral surface) of the cylindrical space 6 and the outline (inner peripheral surface) of the fine holes 4 are separated Because it is positioned, the energy of the laser beam for forming the outline of the cylindrical space 6 is unlikely to be accumulated in the vicinity of the micro holes 4 of the micro hole forming resin layer 2 which is the first layer (micro hole forming resin layer 2 Light energy can be prevented from being excessively irradiated in the vicinity of the micro holes 4), and the micro holes 4 are not clogged by the excess cured material.

Then, the photofabrication method according to the present embodiment supplies a new liquid photocurable resin layer 2 under the micropore non-forming resin layer 3 of the n-1th layer, and the liquid photocurable resin 10 is provided. Is irradiated with light 21 to cure the liquid photocurable resin 10, thereby integrally forming the micropore-forming resin layer 2 of the nth layer. The fine hole forming resin layer 2 of the nth layer is formed in the same number as the space 6 so that the fine holes 4 correspond to the cylindrical spaces 6 one by one. In the step of forming the fine hole forming resin layer 2 of the nth layer, the outline (inner peripheral surface) of the fine holes 4 and the outline of the space 6 of the fine hole non-forming resin layer 3 of the n-1th layer directly above Surface, and the vicinity of the minute holes 4 in the minute hole forming resin layer 2 of the nth layer faces the space 6, so that the energy of the laser beam for forming the outline of the minute holes 4 is directly above It is difficult to be accumulated in the micropore non-forming resin layer 3 of the n−1 layer, and the micropores 4 of the micropore forming resin layer 2 of the nth layer are not blocked by the excessive cured product.

As described above, in the optical shaping method according to the present embodiment, the second to (n−1) th non-micropore-forming resin layers 3 are sequentially stacked under the micropore-forming resin layer 2 of the first layer. The micro-hole-forming resin layer 2 of the n-th layer is stacked under the micro-hole non-forming resin layer 3 of the (n-1) -th layer to form the optically shaped article 1 shown in FIG. In the curing step of this stereolithography method, the irradiation range (range for photocuring) of the light 21 to the liquid photocurable resin 10 is the 3D data 14 of the stereolith 1 shown in FIG. 1 (correction as in the conventional example) Not determined based on 3D data).

(Post-processing)
FIG. 3 is a view for explaining the post-treatment of the curing process of the optical forming method according to the embodiment of the present invention. 3 (a) is a diagram of a first process for carrying out the post-treatment, and FIG. 3 (b) is a diagram of a second process for carrying out the post-treatment, and FIG. ) Is a diagram of the third step for carrying out the post-treatment.

As shown in FIG. 3 (a), in the first step for carrying out the post-treatment, after the curing step is completed, the shaping table 11 ascends, and the optically shaped article 1 is taken out of the container. ing.

Next, as shown in FIG. 3 (b), in the second step for carrying out the post-processing, the support 12 and the optical model 1 are removed from the modeling table 11.

Next, as shown in FIG. 3C, in the third step for carrying out the post-processing, the support 12 and the photofabricated object 1 are separated.

(Effect of this embodiment)
As described above, according to the optical forming method according to the present embodiment, the minute holes 4 of the minute hole forming resin layer 2 are opened to the spaces 6 of the minute hole non-forming resin layer 3 larger than the minute holes 4. And the outlines of the micro holes 4 of the micro hole forming resin layer 2 and the outlines of the spaces 6 of the micro hole non-forming resin layer 3 are separated and irradiated to the micro hole forming resin layer 2 and the micro hole non-forming resin layer 3 Since the energy of the laser beam is unlikely to be accumulated in the vicinity of the minute holes 4, the minute holes 4 are not blocked by the excess cured material.

Further, according to the optical forming method according to the present embodiment, 3D data (three-dimensional CAD data) 14 of the optical formed object 1 having the fine holes 4 is used as it is (three-dimensional CAD data as in the conventional example is formed Even if it is shaped without converting it into contour line data, the micro holes 4 will not be blocked by the excess hardened material, and the photofabricated object (three-dimensional structure) 1 having the high precision micro holes 4 can be easily made Can be created.

(First modification)
FIG. 4 is a view for explaining a first modification of the optical shaping method according to the first embodiment. In addition, FIG. 4A is a plan view of the photofabricated object 1 formed by the photofabrication method according to the present modification. Moreover, FIG.4 (b) is a front view of the optical shaping thing 1 formed of the optical shaping method which concerns on this modification. Further, FIG. 4C is a cross-sectional view of the optically modeled object 1 shown by being cut along line A2-A2 in FIG. 4A.

As shown in FIG. 4, in the photofabricated object 1 formed by the photofabrication method according to the present modification, the micropore-forming resin layer 2 of the first layer and the micropore-forming resin layer 2 of the nth layer are the first embodiment. It is formed in the same manner as the optical shaped article 1 in the form. However, in the photofabricated object 1 formed by the photofabrication method according to the present modification, the shape of the space 6 of the second to (n-1) th micropore non-forming resin layers 3 is the light according to the first embodiment. It differs from the shape of the space 6 of the object 1.

That is, in the optical shaping method according to the present modification, all of the micro holes 4 in the micro hole forming resin layer 2 of the first layer and the n th The micro-hole forming resin layer 2 of the layer is configured to form a quadrangular prism-shaped space 6 in which all the micro holes 4 are opened. That is, the micropore non-formation resin layer 3 of the second layer to the (n-1) th layer formed by the optical shaping method according to this modification is the micropores of the micropore formation resin layer 2 of the first layer and the nth layer. Assuming that the shape projected onto the virtual plane (XY plane) 7 parallel to the stacking plane is a microhole projection shape, the projection shape onto the virtual plane 7 is a space 6 larger than the microhole projection shape, and A space 6 is formed along the stacking direction (−Z direction) in such a size that the projection shape on the virtual plane 7 includes all of the micro hole projection shapes.

According to the stereolithography method according to the present modification, the outline forming the space 6 of the second to (n-1) th micropore non-forming resin layers 3 and the micropore formation of the first layer and the nth layer In order to form the optical modeling thing 1 so that the outline which forms the micro hole 4 of the resin layer 2 may be located apart, the same effect as the optical shaping method which concerns on 1st Embodiment can be acquired.

(2nd modification)
FIG. 5 is a view for explaining a second modified example of the optical shaping method according to the first embodiment. FIG. 5 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present modification. Moreover, FIG.5 (b) is a front view of the optical molded article 1 formed of the optical modeling method which concerns on this modification. Further, FIG. 5 (c) is a cross-sectional view of the optically shaped article 1 shown by cutting along line A3-A3 in FIG. 5 (a).

As shown in FIG. 5, the optical three-dimensional object 1 formed by the optical forming method according to the present modification has the same space 6 as the space 6 of the optical three-dimensional object 1 formed by the optical forming method according to the first modification. Except that a plurality of columns 26 are disposed to support the micro-hole forming resin layer 2 of the first layer and the micro-hole forming resin layer 2 of the n-th layer by the plurality of columns 26; It is the same as the optical model 1 formed by the optical modeling method according to the first modification. The pillars 26 are formed in a prismatic shape, and are arranged at equal distances from the four adjacent fine holes 4 (arranged in places where they do not interfere with the fine holes 4). Four places are formed. The support column 26 is not limited to a prismatic shape, and may be a rod-like body having a circular cross section or another shape. In the column 26, one end in the longitudinal direction is connected to the lower surface of the fine hole forming resin layer 2 of the first layer, and the other end in the longitudinal direction is connected to the upper surface of the fine hole forming resin layer 2 of the nth layer. .

The stereolithography method according to the present modification is similar to the stereolithography method according to the first modification, except that the contour and the first layer forming the space 6 of the non-microporous resin layer 3 of the second to n-1th layers are formed. And the n-th layer of the micro-hole forming resin layer 2 to form the photofabricated object 1 so as to be apart from the contour of the micro-hole forming resin layer 2 forming the micro-hole forming resin layer 2. be able to.

(Third modification)
FIG. 6 is a view for explaining a third modification of the optical shaping method according to the first embodiment. FIG. 6 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present modification. Moreover, FIG.6 (b) is a front view of the optical shaping thing 1 formed of the optical shaping method which concerns on this modification. Further, FIG. 6C is a cross-sectional view of the optically modeled object 1 shown by being cut along line A4-A4 in FIG. 6A. 6 (d) is an enlarged view of a portion B of FIG. 6 (c).

As shown in FIG. 6, the optical three-dimensional object 1 formed by the optical forming method according to the present modification is formed in the same shape as the optical three-dimensional object 1 formed by the optical forming method according to the first embodiment However, the first microvoided resin layer 2 of the first layer, the second non-perforated resin layer 3 of the second to n-1th layers, and the microvoided resin layer 2 of the nth layer are formed in a lattice structure. It is supposed to be.

The stereolithography method according to the present modification is similar to the stereolithography method according to the first embodiment in that the outline and the first layer that form the space 6 of the non-microporous resin layer 3 of the second to (n-1) th layers. And the n-th layer of the micro-hole forming resin layer 2 to form the photofabricated object 1 so as to be apart from the contour of the micro-hole forming resin layer 2 forming the micro-hole forming resin layer 2. be able to.

In addition, the optical shaping method which concerns on this modification can be applied to the optical shaping method which concerns on a 2nd modification, and the whole of the optical modeling thing 1 containing the support | pillar 26 can be made into a grid | lattice-like structure.

Second Embodiment
FIG. 7 is a view showing an optical form 1 formed by the optical forming method according to the second embodiment of the present invention. FIG. 7 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present embodiment. Moreover, FIG.7 (b) is a front view of the optical modeling thing 1 formed of the optical shaping method which concerns on this embodiment. Further, FIG. 7 (c) is a cross-sectional view of the optically modeled object 1 shown by being cut along line A5-A5 in FIG. 7 (a). Moreover, FIG.7 (d) is a reverse view of the optical molded article 1 formed of the optical modeling method which concerns on this embodiment.

As shown in FIG. 7, in the optical forming method according to the present embodiment, a plurality of microhole-forming resin layers 2 of the first layer in which a single microhole 4 is formed and a plurality of spaces 6 in which the microholes 4 are formed are formed. The micro-hole non-forming resin layer 3 of the layer (the second layer to the n-th layer) and the rectangular shaped optical shaped article 1 are formed. The photofabricated object 1 formed by the photofabrication method according to the present embodiment is formed such that the fine holes 4 and the spaces 6 correspond to each other in a one-to-one manner.

That is, in the photofabrication method according to the present embodiment, after forming the micropore-forming resin layer 2 having the micropores 4 of the first layer, the micropore non-forming resin layer 3 is Layers are sequentially stacked under the micropore-forming resin layer 2 to form the photofabricated object 1, and a cylindrical space 6 extending along the laminating direction is formed in the micropore non-forming resin layer 3 of the second to n-th layers. It is supposed to The space 6 of the second to n-th microhole non-perforated resin layers 3 has a minute shape in which the microholes 4 of the microhole-forming resin layer 2 of the first layer are projected onto the virtual plane 7 parallel to the lamination surface. In the case of the hole projection shape, the projection shape on the virtual plane 7 is larger than the micro hole projection shape, and the projection shape on the virtual plane 7 has a size including all of the micro hole projection shapes.

The stereolithography method according to the present embodiment is similar to the stereolithography method according to the first embodiment, except that the outline of the second layer to the nth layer forming the space 6 of the non-microporous resin layer 3 and the fineness of the first layer In order to form the light figure 1 so that the outline forming the fine holes 4 of the hole forming resin layer 2 is separated, the energy of the laser light forming the outline of the space 6 of the non-fine hole forming resin layer 3 is fine holes Since it is difficult to be accumulated in the vicinity of 4, the fine holes 4 are not blocked by the excess cured material.

In addition, the stereolithography method according to the present embodiment uses 3D data (three-dimensional CAD data) 14 of the stereolith 1 having fine holes 4 as it is (three-dimensional CAD data as in the prior art for modeling) Even if the molding is carried out without conversion to contour line data, the fine holes 4 are not blocked by the excess hardened material, and the photofabricated object (three-dimensional structure) 1 having the fine holes 4 of high accuracy is easily created it can.

(First modification)
FIG. 8 is a view for explaining a first modified example of the optical shaping method according to the second embodiment of the present invention. FIG. 8 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present modification. Moreover, FIG.8 (b) is a front view of the optical shaping thing 1 formed of the optical shaping method which concerns on this modification. Further, FIG. 8C is a cross-sectional view of the optically modeled object 1 shown by being cut along line A6-A6 in FIG. 8A. Moreover, FIG.8 (d) is a reverse view of the optical molded article 1 formed of the optical modeling method which concerns on this modification.

As shown in FIG. 8, in the optical shaping method according to the present modification, the second to n-1th layers are the fine hole non-forming resin layer 3 and the nth layer is the fine hole forming resin layer 2. It differs from the optical shaping method according to the second embodiment. The fine hole forming resin layer 2 of the nth layer (the layer at the lower end along the stacking direction) and the fine holes 4 of the fine hole forming resin layer 2 of the first layer (the layer at the upper end along the stacking direction) The same fine holes 4 are formed. The optical shaping method according to the present modification can obtain the same effect as the optical shaping method according to the second embodiment.

(2nd modification)
FIG. 9 is a view for explaining a second modification of the optical shaping method according to the second embodiment of the present invention. Fig. 9 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present modification. Moreover, FIG.9 (b) is a front view of the optical shaping thing 1 formed of the optical shaping method which concerns on this modification. Further, FIG. 9 (c) is a cross-sectional view of the optically shaped article 1 shown by cutting along line A7-A7 in FIG. 9 (a). Moreover, FIG.9 (d) is a reverse view of the optical molded article 1 formed of the optical modeling method which concerns on this modification.

As shown in FIG. 9, in the optical shaping method according to the present modification, the first layer (layer at the upper end along the stacking direction) and the nth layer (layer at the lower end along the stacking direction) are located The intermediate layer (the m-th layer) is the micropore non-forming resin layer 2 and the layer above the intermediate layer (the m-th layer) in the stacking direction (first to m-1th layers) is the micropore non-forming resin layer The layer (the (m + 1) -th to the n-th layer) below the intermediate layer (the m-th layer) in the stacking direction is set as the fine hole non-forming resin layer 3. Then, in the optical shaping method according to the present modification, the minute holes 4 are formed in the minute hole forming resin layer 2 of the intermediate layer (the m-th layer), and the first through m-1th layers of the minute hole non-forming resin layer A first space 6 is formed in 3 and a second space 6 is formed in the micropore non-forming resin layer 3 of the (m + 1) th to n-th layers. The rectangular parallelepiped optical shaped article 1 formed by the optical shaping method according to the present modification is an optical shaped article in which the first space 6 and the second space 6 are formed by the optical shaping method according to the second embodiment. It is the shape which divided the space 6 of 1 into 2 along the lamination direction, and the fine hole 4 is the same shape as the fine hole 4 of the optical modeling thing formed by the optical modeling method which concerns on 2nd Embodiment. The optical shaping method according to the present modification can obtain the same effect as the optical shaping method according to the second embodiment.

(Third modification)
FIG. 10 is a view for explaining a third modification of the optical shaping method according to the second embodiment of the present invention. FIG. 10 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present modification. Moreover, FIG.10 (b) is a front view of the optical shaping thing 1 formed of the optical shaping method which concerns on this modification. Further, FIG. 10 (c) is a cross-sectional view of the optically shaped article 1 shown by cutting along the line A8-A8 in FIG. 10 (a). Further, FIG. 10 (d) is a back view of an optical formed article 1 formed by the optical forming method according to the present embodiment.

As shown in FIG. 10, in the optical shaping method according to the present modification, the optical shaping method of the first modification and the optical shaping method of the second modification are united, and the first layer, the intermediate Layer (the m-th layer) and the n-th layer are the micropore-forming resin layer 2, and the space between the first layer and the intermediate layer (the m-th layer) is the non-micropore-forming resin layer 3; And the n-th layer is a fine hole non-forming resin layer 3. Then, in the photofabricated object 1 formed by the photofabrication method according to the present modification, the micropores 4 are formed in the micropore-forming resin layer 2, and the space 6 is formed in the micropore non-forming resin layer 3. The rectangular parallelepiped shaped optical shaped object 1 formed by the optical shaping method according to the present modification has the same space shape as the planar shape of the space 6 of the optical shaped object 1 formed by the optical shaping method according to the second embodiment. The minute holes 4 have the same shape as the minute holes 4 of the optical three-dimensional object 1 formed by the optical forming method according to the second embodiment. The optical shaping method according to the present modification can obtain the same effect as the optical shaping method according to the second embodiment.

(4th modification)
FIG. 11 is a view for explaining a fourth modification of the optical shaping method according to the second embodiment of the present invention. FIG. 11 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present modification. Moreover, FIG.11 (b) is a front view of the optical shaping thing 1 formed of the optical shaping method which concerns on this modification. Further, FIG. 11C is a cross-sectional view of the optically modeled object 1 shown by being cut along a line A9-A9 in FIG. Moreover, FIG.11 (d) is a reverse view of the optical molded article 1 formed of the optical modeling method which concerns on this modification.

As shown in FIG. 11, in the optical shaping method according to the present modification, after forming the micro-hole forming resin layer 2 having the micro-holes 4 of the first layer, the micro-hole non-forming resin is formed for the second to n-th layers. Layers 3 are sequentially stacked under the micropore-forming resin layer 2 of the first layer to form the photofabricated object 1, and a step-like shape extending along the laminating direction to the micropore non-forming resin layers 3 of the second to n-th layers. To form a space 6 of The space 6 of the micropore non-perforated resin layer 3 of the second to n-th layers has a circular shape in a plan view, and its diameter increases in steps as it goes from the second layer to the n-th layer. Assuming that the shape of the fine holes 4 of one layer of fine hole forming resin layer 2 projected onto the virtual plane 7 parallel to the laminated surface is the fine hole projected shape, the projected shape on the virtual plane 7 is larger than the fine hole projected shape, Also, the projection shape on the virtual plane 7 is sized to include all the micro hole projection shapes. The optical shaping method according to the present modification can obtain the same effect as the optical shaping method according to the second embodiment.

(5th modification)
FIG. 12 is a view for explaining a fifth modification of the optical shaping method according to the second embodiment of the present invention. FIG. 12 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present modification. Moreover, FIG.12 (b) is a front view of the optical shaping thing 1 formed of the optical shaping method which concerns on this modification. FIG. 12 (c) is a cross-sectional view of the optically modeled object 1 shown by being cut along line A10-A10 in FIG. 12 (a). Moreover, FIG.12 (d) is a reverse view of the optical molded article 1 formed of the optical modeling method which concerns on this modification.

As shown in FIG. 12, in the optical shaping method according to the present modification, after forming the micro-hole forming resin layer 2 having the micro-holes 4 of the first layer, the micro-hole non-forming resin layer 3 is Layers are sequentially stacked under the micropore-forming resin layer 2 of the first layer up to the n-1 layer to form the photofabricated object 1, and the micropore-forming resin layer 2 having micropores 4 in the nth layer is formed There is. The minute holes 4 having the same shape are formed in the minute hole forming resin layer 2 of the first layer and the minute hole forming resin layer 2 of the nth layer. Further, a space 6 having a circular shape in a plan view is formed in the fine hole non-forming resin layer 3 of the second to (n−1) th layers. The space 6 is formed so as to expand in a stepwise manner toward the intermediate layer (m-th layer) of the second layer and the n-1st layer, and the space 6 is formed of the micro-hole forming resin layer 2 of the first layer. If the shape of the minute holes 4 projected onto the virtual plane 7 parallel to the stacking plane is the minute hole projection shape, the shape projected onto the virtual plane 7 is larger than the shape projected onto the small holes 7 and the shape projected onto the virtual plane 7 is It is sized to include all of the microhole projection shapes. The optical shaping method according to the present modification can obtain the same effect as the optical shaping method according to the second embodiment.

(Sixth modification)
FIG. 13 is a view for explaining a sixth modification of the optical shaping method according to the second embodiment of the present invention. FIG. 13 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present modification. Moreover, FIG.13 (b) is a front view of the optical shaping thing 1 formed of the optical shaping method which concerns on this modification. Further, FIG. 13 (c) is a cross-sectional view of the optically modeled object 1 shown by being cut along line A11-A11 in FIG. 13 (a). Moreover, FIG.13 (d) is a reverse view of the optical molded article 1 formed of the optical modeling method which concerns on this modification.

As shown in FIG. 13, in the optical shaping method according to the present modification, the intermediate layer between the first layer (layer at the upper end along the stacking direction) and the nth layer (layer at the lower end along the stacking direction) The (m-th layer) is the micropore-forming resin layer 2, the first to m-1th layers are the non-microporous resin layer 3, and the (m + 1) th to n-th layers are the non-microporous resin layer 3 As described above, by forming the first layer to the n-th layer so as to be sequentially stacked, a rectangular parallelepiped shaped optical modeling object 1 is formed.

In the micropore non-perforated resin layer 3 of the first to (m−1) th layers, a first space 6 whose diameter is reduced stepwise in the stacking direction is formed. Further, in the micropore non-perforated resin layer 3 of the (m + 1) -th to n-th layers, a second space 6 is formed in which the diameter is increased stepwise in the stacking direction. The first space 6 and the second space 6 are vertically symmetrical (upper and lower symmetrical along the stacking direction) with respect to the minute hole forming resin layer 2 of the m-th layer, and the shape in plan view is circular. If the shape of the minute hole forming resin layer 2 of the m-th layer projected onto the virtual plane 7 parallel to the laminated surface is the minute hole projection shape, the shape projected onto the virtual plane 7 is more than the minute hole projection shape The projection shape on the virtual plane 7 is sized to include all of the microhole projection shapes. The optical shaping method according to the present modification can obtain the same effect as the optical shaping method according to the second embodiment.

Third Embodiment
FIG. 14 is a view showing an optical form 1 formed by the optical forming method according to the third embodiment of the present invention. In addition, Fig.14 (a) is a top view of the optical modeling thing 1 formed of the optical shaping method which concerns on this embodiment. Further, FIG. 14 (b) is a cross-sectional view of the optically shaped article 1 shown by being cut along line A12-A12 in FIG. 14 (a). In addition, the optical shaped article 1 formed by the optical shaping method according to the present embodiment shown in FIG. 14 has the same reference numerals as those of the optical shaped article 1 formed by the optical shaping method according to the first embodiment. The description overlapping with the description of the optical modeling object 1 formed by the optical modeling method according to the first embodiment is appropriately omitted.

As shown in FIG. 14, in the optical shaping method according to the present embodiment, each of the spaces 6 (a hole having a diameter larger than that of the micro holes 4) is formed in the micro hole forming resin layer 2 having the micro holes 4 of the first layer and the second layer. After forming the microhole non-forming resin layer 3 sequentially from the third layer to the n-2th layer under the microhole forming resin layer 2 of the second layer, and the nth n-2 layer under the n-2th layer. A space 6 is formed in each of the micropore-forming resin layer 2 having the micropores 4 of the first layer and the n-th layer to form the photofabricated object 1 including the first to n-th resin layers (2, 3) It is supposed to form.

In the optical shaping method according to the present embodiment, the space 6 of the micro-hole forming resin layer 2 of the second layer is formed below the micro-holes 4 of the micro-hole forming resin layer 2 of the first layer. The fine holes 4 of the fine hole forming resin layer 2 of the second layer are formed under the space 6 of the fine hole forming resin layer 2 of the second embodiment, and the fine holes 4 of the fine hole forming resin layer 2 of the second layer are The space 6 of the three-layer non-micropore non-forming resin layer 3 is formed. In the optical forming method according to the present embodiment, the fine holes 4 of the fine hole forming resin layer 2 of the n-1th layer are formed below the space 6 of the fine hole non-forming resin layer 3 of the n-2th layer. The space 6 of the micropore-forming resin layer 2 of the nth layer is formed below the micropores 4 of the micropore-forming resin layer 2 of the n-1th layer, and the micropore-forming resin layer 2 of the n-1th layer is formed The minute holes 4 of the minute hole forming resin layer 2 of the nth layer are formed under the space 6.

As described above, according to the optical forming method according to the present embodiment, the outline forming the micro holes 4 of the micro hole forming resin layer 2 of the first layer and the space 6 of the micro hole forming resin layer 2 of the second layer are formed. The contours are located apart, and the contours forming the micro holes 4 of the micro-hole forming resin layer 2 of the second layer and the contours forming the space 6 of the micro-hole forming resin layer 2 of the first layer are separated, The light figure 1 is formed so that the outline forming the fine holes 4 of the two microhole-forming resin layers 2 and the outline forming the spaces 6 of the third non-micropores forming resin layer 3 are separated. In addition, according to the optical forming method according to the present embodiment, the outline forming the minute holes 4 of the minute hole forming resin layer 2 of the n-1th layer and the space 6 of the minute hole non-forming resin layer 3 of the n-2th layer The contour forming the second layer is separated and the contour forming the micro hole 4 of the micro hole forming resin layer 2 of the n-1st layer is separated from the contour forming the space 6 of the micro hole forming resin layer 2 of the n th layer The optical shaping is performed so that the outline forming the micro holes 4 of the n-th layer micro-hole forming resin layer and the outline forming the space 6 of the n-1st layer non-micro-hole forming resin layer 3 are separated. Form item 1 Therefore, according to the optical shaping method according to the present embodiment, the same effect as the optical shaping method according to the first embodiment can be obtained.

Fourth Embodiment
FIG. 15 is a view showing an optical form 1 formed by the optical forming method according to the fourth embodiment of the present invention. FIG. 15 (a) is a plan view of an optical form 1 formed by the optical forming method according to the present embodiment. Further, FIG. 15 (b) is a cross-sectional view of the optically modeled object 1 shown by being cut along line A13-A13 in FIG. 15 (a).

As shown in FIG. 15, in the optical shaping method according to the present embodiment, the resin layers 2a of the first to n-th layers are sequentially cured and stacked to form a rectangular parallelepiped optical shaped article 1 . A plurality of micro holes 4 and a plurality of spaces 6 are formed in each of the resin layers 2 a of the first to n-th layers. Each resin layer 2a of the first to n-th layers is a microhole-forming resin layer of the photofabricated object 1 formed by the photofabrication method according to the first embodiment in that the micropores 4 are formed. Similar to 2.

In the optical shaping method according to the present embodiment, when the resin layers 2a of the first layer to the resin layer 2a of the n-th layer are stacked from the top to the bottom, the micro holes 4 are formed in the upper resin layer 2a, A space 6 is formed at a position facing the fine holes (fine holes of the upper resin layer 2a) 4 of the lower resin layer 2a stacked on the upper resin layer 2a.

In the optical shaping method according to the present embodiment, when the first resin layer 2a to the nth resin layer 2a are stacked from the bottom to the top, the micro holes 4 are formed in the lower resin layer 2a. Thereafter, a space 6 is formed at a position facing the fine holes (fine holes of the lower resin layer 2a) 4 of the upper resin layer 2a stacked on the lower resin layer 2a.

In addition, in the optical shaping method according to the present embodiment, the resin layer 2a of the intermediate layer (any one of the second layer to the n-1th layer) excluding the resin layer 2a of the first layer and the resin layer 2a of the nth layer When the micro holes 4 are to be formed, the

spaces

6, 6 are formed at positions facing the micro holes 4 of the resin layer 2 a located above and below the resin layer 2 a of the intermediate layer forming the micro holes 4. There is.

And in the optical modeling thing 1 formed of the optical modeling method concerning this embodiment, the space 6 of the resin layer 2a of the 1st to n-th layers is to the virtual plane 7 parallel to the lamination surface of the resin layer 2a. The projection shape is formed to be larger than the microhole projection shape which is a shape obtained by projecting the microhole 4 on the virtual plane 7, and the projection shape on the virtual plane 7 has a size including all the microhole projection shapes. It is formed to be

According to the stereolithography method according to the present embodiment as described above, the outline of the minute hole 4 and the outline of the space 6 are separated and energy of the laser light is accumulated in the vicinity of the minute hole 4 of the resin layer 2a. Since it is difficult, the fine holes 4 are not blocked by the excess cured material, and the same effect as the optical shaping method according to the first embodiment can be obtained.

In addition, the lamination molding method according to the present invention is not limited to the optical molding method according to each of the above-described embodiments and the respective modifications thereof, and powdery resin layers are sintered by laser light of the lamination molding apparatus and stacked. The present invention is also applicable to a powder sintering method in which a three-dimensional structure is formed by a plurality of resin layers.

Moreover, the fine holes 4 and the space 6 of the optical formed article 1 formed by the optical forming method according to the second embodiment and the respective modifications thereof are the micro holes 4 and the space 6 of the optical formed article 1 according to the first embodiment. By appropriately replacing the above, it is possible to form the photofabricated object 1 (the photofabricated object 1 composed of the plurality of micro holes 4 and the plurality of spaces 6) of the structure according to the purpose of use.

Further, in the description of the optical forming method according to the first to fourth embodiments and the respective modifications, the fine holes 4 have exemplified the circular planar shape, but the present invention is not limited thereto. It may have an arbitrary planar shape such as D-cut shape or hexagonal shape. In addition, although the space 6 exemplifies a circular or square planar shape, the space 6 is not limited to this, and may have an arbitrary planar shape such as an elliptical shape or a hexagonal shape.

Further, in the description of the optical shaping method according to the first to fourth embodiments and the respective modifications, the optical figure 1 exemplifies a rectangular solid having a quadrangular planar shape, but the present invention is not limited thereto. The outer diameter shape may be changed as appropriate, such as a plate-like body having a circular shape and a plate-like body having a hexagonal shape in plan view.

Further, in the description of the optical forming method according to the first embodiment, each modification of the first embodiment, the third embodiment, and the fourth embodiment, the fine holes 4 are equally pitched at a total of nine locations in three rows and three columns. Although the aspect formed by P was illustrated, as long as the relationship between the micro holes 4 and the space 6 shown in the first embodiment, the third embodiment and the fourth embodiment is satisfied (the outline of the micro holes 4 and the space 6 Of the laser light energy is hard to be accumulated in the vicinity of the micro holes 4 and the micro holes 4 are formed into a micro hole forming resin layer, as long as the micro holes 4 are not blocked by the excess cured material). It may be formed at an arbitrary pitch at two.

Moreover, in the description of the optical forming method according to the first embodiment, the second embodiment, the third embodiment, and each modification, the fine hole forming resin layer 2 is illustrated as a single layer, but the fine holes 4 have excessive curing. The micropore-forming resin layer 2 may have a plurality of layers as long as it is not clogged with a substance.

In addition, the optical shaping method according to the present invention is the method exemplified in each of the first embodiment, the second embodiment, the third embodiment, and the optical shaping method according to each modification (the respective resins of the first to n-th layers) The method is not limited to the method of sequentially stacking the layers downward, and the first layer may be the lowermost layer, and the resin layer may be sequentially stacked on the lowermost resin layer of the first layer.

1 ...... Photofabricated object (three-dimensional structure), 2 ...... Micro-hole forming resin layer (resin layer), 2 a ...... Resin layer, 3 ...... Micro-hole non-forming resin layer (resin layer), 4 ...... Fine Hole, 6 ... space, 7 ... virtual plane

Claims

In the additive manufacturing method of stacking resin layers cured by light irradiation to produce a three-dimensional structure having fine holes,
The three-dimensional structure includes a fine hole forming resin layer in which the fine holes are formed, and a fine hole non-forming resin layer in which the fine holes are not formed.
In the microhole non-formation resin layer, when the shape of the microhole projected on the virtual plane parallel to the lamination plane is the microhole projection shape, the space projected on the virtual plane is larger than the microhole projection shape And a space having a size in which the projected shape on the virtual plane includes all of the projected shapes of fine holes is formed along the stacking direction of the resin layers.
Additive manufacturing method characterized by
The micro holes and the space are formed to correspond one to one,
The layered manufacturing method according to claim 1 characterized by things.
A plurality of the micro holes are formed in the micro hole forming resin layer,
The plurality of micro holes are formed to open in the space,
The layered manufacturing method according to claim 1 characterized by things.
A plurality of the micro holes are formed in the micro hole forming resin layer,
In the fine hole non-forming resin layer, the space is formed in one-to-one correspondence with the fine holes.
The layered manufacturing method according to claim 1 characterized by things.
The fine hole forming resin layer is formed on the upper end and the lower end along the stacking direction of the three-dimensional structure.
The layered manufacturing method according to claim 1 characterized by things.
The micro holes in the upper end along the stacking direction of the three-dimensional structure and the micro holes at the lower end along the stacking direction of the three-dimensional structure at a position not interfering with the micro holes in the space A support supporting the forming resin layer is formed,
The layered manufacturing method according to claim 5 characterized by things.
The fine hole forming resin layer is formed in a plurality along the stacking direction of the three-dimensional structure.
The layered manufacturing method according to claim 1 characterized by things.
The micropore-forming resin layer is formed between an upper end and a lower end along the stacking direction of the three-dimensional structure.
The layered manufacturing method according to claim 1 characterized by things.
In the additive manufacturing method of stacking resin layers cured by light irradiation to produce a three-dimensional structure having fine holes,
The three-dimensional structure is
When the first to n-th resin layers are stacked from the top to the bottom, micro holes are formed in the upper resin layer, and then the lower resin layer is stacked on the upper resin layer. A space is formed at a position opposite to the minute hole,
When the first resin layer to the nth resin layer are stacked from the bottom to the top, micro holes are formed in the lower resin layer, and then the upper resin layer is stacked on the lower resin layer. A space is formed at a position opposite to the minute hole,
The space is formed such that the projected shape on a virtual plane parallel to the laminated surface of the resin layer is larger than the projected shape of a microhole which is a shape obtained by projecting the microhole on the virtual plane, and the virtual The projection onto a plane is sized to include all of the microhole projections;
Additive manufacturing method characterized by
The three-dimensional object is formed in a lattice-like structure,
The additive manufacturing method according to any one of claims 1 to 9, characterized in that: