JP2009190291A - Method of forming support and method of manufacturing three dimensional shaped article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of forming a support capable of shaping and manufacturing the three dimensional shape article with excellent shape precision by suppressing deformation of a part forming a hollow part in the three dimensional shape article when manufacturing the three dimensional article having the hollow part by the laser beam lithography, and a method of manufacturing the three dimensional article by the laser beam lithography applying the method of forming the support. <P>SOLUTION: A ring body R having the hollow part composing the three dimensional article is equipped with the support S in the inner side of the ring body R. The support part S is a film having the thickness of approximately 0.2 mm formed in the hollow part in a state connected to an inner peripheral surface R1 in a ring body R composing the three dimensional article. The film shaped support part S is formed along with the shaping of the ring body R in a process for shaping the ring body R, and prevents the part forming the hollow part by contracting the ring body R in the middle of being shaped from being deformed toward the inner side of the ring body R. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for forming a support that supports a three-dimensional object when a desired three-dimensional object is manufactured using a photocurable resin that is cured by irradiating light, and light to which the support forming method is applied. The present invention relates to a method for manufacturing a three-dimensional structure by a modeling method.

Conventionally, a so-called stereolithography method for producing a desired three-dimensional (three-dimensional) modeled object (hereinafter referred to as “three-dimensional modeled object”) using a photocurable resin that is cured by irradiation with light such as ultraviolet rays. It has been known. For example, Patent Literature 1 and Patent Literature 2 below disclose an optical modeling apparatus for manufacturing a desired three-dimensional model using an optical modeling method.
JP 2003-39564 A JP 2007-331118 A

  These optical modeling apparatuses mainly include a transparent substrate made of glass or the like, a resin tank for storing a liquid photocurable resin on the transparent substrate, a table for holding a three-dimensional modeled object in a vertically movable state, and a desired And a projector that projects an image representing each divided layer obtained by dividing the three-dimensional object to be formed in the horizontal direction onto a transparent substrate. Then, with the photocurable resin stored in the resin tank on the transparent substrate, the table is positioned at a predetermined height position (about 30 μm) from the transparent substrate, and each divided layer is projected from the lower side of the transparent substrate by the projector. Are sequentially projected. In this case, the table is raised upward by a predetermined amount (about 30 μm) every time one divided layer is projected. Thereby, a three-dimensional molded item is sequentially modeled downward from the lower surface of the table.

In the modeling process of a three-dimensional modeled object by such an optical modeling method, a modeled object is formed while forming a support that supports the three-dimensional modeled object together with the modeled object by the optical modeling method in order to prevent deformation and tilting of the three-dimensional modeled object in the middle of modeling. Is produced. For example, in the following Patent Document 3 and Patent Document 4, for a three-dimensional object with an unstable standing posture or a three-dimensional object having an overhanged part (a part protruding in an eave shape), A support forming method for manufacturing a three-dimensional structure while forming a lattice-shaped support around the three-dimensional structure together with the three-dimensional structure is disclosed.
Japanese Patent Laid-Open No. 05-301293 Japanese Patent Laid-Open No. 08-25487

  By the way, as shown in FIG. 10 (A) and FIG. 11 (A), there are ring-shaped three-dimensional objects 10 and 20 having hollow portions in the three-dimensional objects manufactured using the optical modeling method. . When the ring-shaped three-dimensional shaped objects 10 and 20 having such hollow portions are formed using the optical modeling method, as shown in FIG. 10B, the upper part of the inner peripheral surface 12 of the ring body 11 (arrow May be deformed into a shape recessed upward in the figure. In addition, as shown in FIG. 11B, the side surface 23 (enclosed by an ellipse) of the base 22 formed on the upper portion of the ring body 21 may be deformed into a bow-shaped shape. 10A, the column 13 extending below the ring body 11 is a column for supporting the ring body 11 in the process of forming the ring body 11, and is removed from the ring body 11 after the ring body 11 is formed. It is what

  These deformations are considered to be because the ring bodies 11 and 21 in the middle of modeling are deformed inward due to shrinkage when the photocurable resin is cured in the process of modeling the three-dimensional modeled object from the lower side to the upper side in the figure. Therefore, in the conventional support such as the support shown in the above-mentioned Patent Document 3 and Patent Document 4, that is, for supporting a three-dimensional object having an unstable standing posture or a three-dimensional object having an overhang portion, There was a problem that the ring-shaped three-dimensional objects 10 and 20 could not be accurately modeled by preventing deformation of the part forming the hollow part of the object.

  The present invention has been made to address the above problems, and its purpose is to form a three-dimensional object having a hollow portion by suppressing deformation of the portion forming the hollow part in the three-dimensional object when the three-dimensional object is manufactured by an optical modeling method. It is an object of the present invention to provide a support forming method capable of modeling and manufacturing a three-dimensional object with high accuracy, and a method for manufacturing a three-dimensional object by an optical modeling method to which the support forming method is applied.

  In order to achieve the above object, the feature of the invention according to claim 1 is that a support for supporting a three-dimensional object is produced when a desired three-dimensional object is manufactured using a photocurable resin that is cured by irradiating light. It is a formation method, Comprising: When modeling the three-dimensional molded item which has a hollow part, it exists in forming the support part for regulating the deformation | transformation of the part which forms the hollow part in a three-dimensional molded item with modeling of a three-dimensional molded item.

  According to the feature of the invention according to claim 1 configured as described above, when forming a three-dimensional object having a hollow portion, while forming a support part that restricts deformation of a part forming the hollow part in the three-dimensional object. A three-dimensional model is modeled. Thereby, the deformation | transformation of the part which forms the hollow part in a three-dimensional molded item in the middle of modeling of a three-dimensional molded item is suppressed. As a result, the part which forms the hollow part in a three-dimensional molded item can be modeled accurately, and the whole three-dimensional molded item can be manufactured accurately.

  Further, the invention according to claim 2 is characterized in that, in the support forming method, the support portions are formed on both sides of the three-dimensional structure, respectively, and a plate-like outer support portion that resists deformation of the portion forming the hollow portion. It is in having. According to the feature of the invention according to claim 2 configured as described above, since the support portion is formed outside the three-dimensional structure, the support portion can be formed with a relatively free size, number, and arrangement. it can.

  According to a third aspect of the present invention, in the method for forming a support, the support portion is formed on an inner peripheral surface that forms a hollow portion in the three-dimensional structure, and resists deformation of a portion that forms the hollow portion. It is in providing the plate-shaped inner side support part to do. According to the feature of the invention according to claim 3 configured as described above, since the trace of forming the support portion does not remain on the outer peripheral surface of the three-dimensional structure, the work of erasing the support marks from the outer peripheral surface of the three-dimensional structure Is not necessary, and the three-dimensional object can be manufactured in a state where the appearance of the three-dimensional object is maintained. In addition, even if it is a case where a support part is formed in the outer side of a three-dimensional molded item, it is possible to erase the trace of a support from the outer peripheral surface of a three-dimensional molded item.

  The invention according to claim 4 is characterized in that, in the support forming method, a reinforcing portion for restricting deformation of the support portion is formed together with the support portion. According to the characteristic of the invention which concerns on Claim 4 comprised in this way, a support part can be formed more firmly, and manufacture of a more accurate three-dimensional molded item is attained.

  Further, the present invention can be implemented not only as a support forming method but also as a method for manufacturing a three-dimensional object by an optical modeling method to which the support forming method is applied (invention according to claim 5). .

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of a method for forming a support according to the present invention and a method for producing a three-dimensional structure by an optical modeling method to which the support forming method is applied will be described with reference to the drawings. FIG. 1 is a partially broken schematic configuration diagram schematically showing an overall configuration of an optical modeling apparatus 100 used when a three-dimensional model is manufactured while forming a support using the support forming method according to the present invention. The optical modeling apparatus 100 is a modeling apparatus that manufactures a three-dimensional model desired by an operator by selectively irradiating light to a photocurable resin having a property of being cured by irradiation with light (ultraviolet rays). . The shape of the three-dimensional structure to which the support forming method according to the present invention is applied is a three-dimensional structure having a hollow portion. Therefore, it is assumed that the three-dimensional structure manufactured by the optical modeling apparatus 100 in the present embodiment is a three-dimensional structure having a hollow portion.

(Configuration of stereolithography apparatus 100)
The optical modeling apparatus 100 includes a transparent substrate 101. The transparent substrate 101 is formed of a rectangular plate-like thin plate material that can transmit light, and is disposed and fixed in a horizontal state on a support base (not shown) in the optical modeling apparatus 100. In the present embodiment, it is made of a glass material having a thickness of about 5 mm. A film 102 is disposed on the upper surface of the transparent substrate 101. The film 102 is for preventing the photocurable resin to be cured on the transparent substrate 101 from adhering to the upper surface of the transparent substrate 101, and is made of a resin film material that can transmit light. In this embodiment, a film made of polyethylene terephthalate (so-called PET) having a thickness of about 100 μm is used. Further, the upper surface of the film 102 is coated with a release material (in this embodiment, fluorosilicone) for easily peeling the photocurable resin cured on the upper surface of the film 102. In addition, although this film 102 is arrange | positioned in the state set | placed on the transparent substrate 101, you may arrange | position by fixing with a double-sided tape etc.

  A wall body 103 is arranged on the upper surface of the film 102. The wall body 103 is a cylindrical wall for holding the liquid photocurable resin 104 on the film 102, and a rubber material having an inner diameter of about 50 mm to 200 mm is used according to the size of the three-dimensional structure. Yes. The transparent substrate 101, the film 102, and the wall body 103 form a resin tank 105 that holds the liquid photocurable resin 104. The photocurable resin 104 stored in the storage tank 107 is supplied into the resin tank 105 by the liquid pump 106.

  A table 108 is disposed above the transparent substrate 101. The table 108 is a photocurable resin 104 cured by irradiating light, that is, a rectangular plate-like member for holding a three-dimensional model, and is made of a flexible resin material. In the present embodiment, the plate is made of a plate material made of polyacetal having a thickness of about 2 mm. The table 108 is detachably held with respect to the lifting device 109 in a horizontal state above the transparent substrate 101. The elevating device 109 displaces the table 108 in the vertical direction in the figure while maintaining the table 108 in a horizontal posture using the rotational driving force of the electric motor 109a.

  A reflection mirror 110 is disposed below the transparent substrate 101. The reflection mirror 110 is an optical element that guides reflected light to the lower surface of the transparent substrate 101 by reflecting light emitted from the projector 111 and incident through the objective lens 112 in a direction (upper side in the drawing) perpendicular to the incident direction. . The projector 111 is a projector that emits light for projecting the image represented by the image signal output from the controller 113 onto the photocurable resin 104 stored in the resin tank 105. The objective lens 112 is an optical lens for adjusting the size of an image output from the projector 111 and projected onto the photocurable resin 104 stored in the resin tank 105.

  The controller 113 is constituted by a microcomputer including a CPU, a ROM, a RAM, and the like, and operates the liquid pump 106, the electric motor 109a, and the projector 111 in accordance with instructions from the external computer device 120 connected via the interface 114. Control each one.

  The external computer device 120 is configured by a microcomputer including a CPU, a ROM, a RAM, a hard disk, and the like, and by executing a machining program (not shown) according to instructions from the input device 121 including a keyboard and a mouse, the optical modeling device 100. The operation of the (controller 113) is controlled. In this case, the machining program is stored in advance in the hard disk by the operator. In addition, the external computer device 120 causes the display device 122 formed of a liquid crystal display to appropriately display the operating state of the optical modeling device 100, the execution state of the machining program, and the like. That is, in the present embodiment, the external computer device 120 is assumed to be a personal computer for personal use (so-called personal computer). The external computer device 120 may be any type of computer device as long as it can control the operation of the stereolithography device 100.

(Operation of stereolithography apparatus 100)
Next, a method for forming a support according to the present invention will be described in the process of manufacturing a three-dimensional model using the optical modeling apparatus 100 configured as described above. Moreover, the shape of the three-dimensional molded item to which the support forming method according to the present invention is applied is a three-dimensional molded item in which a hollow portion is formed. Therefore, in this embodiment, the ring body R as shown to FIG. 2 (A) and (B) is made into a three-dimensional molded item as an example.

  First, the operator connects the optical modeling apparatus 100 and the external computer apparatus 120 via the interface 114, and turns on the optical modeling apparatus 100 and the external computer apparatus 120, respectively. Thereby, the stereolithography apparatus 100 and the external computer apparatus 120 will be in the standby state which waits for the input of the command from an operator by executing the predetermined program which is not illustrated.

  Next, the operator operates the external computer device 120 to generate image data representing the shape of the three-dimensional structure to be manufactured. In this case, as shown in FIG. 3, in the image data, in addition to the ring body R to be manufactured, the base part B for fixing the ring body R to the table 108 and the process of modeling the ring body R A support portion S for preventing deformation of the ring body R is included. The base part B includes a flat part B1 formed by being fixed to the lower surface of the table 108, and a columnar column part B2 formed by protruding from the central part of the flat part B1. That is, the three-dimensional structure is formed downward from the lower surface of the table 108.

  The support part S is a plate-like film having a thickness of about 0.2 mm formed in the hollow part in a state where it is connected over the entire circumference of the inner peripheral surface R1 of the ring body R constituting the three-dimensional structure. This film-like support portion S prevents the portion of the ring body R that is in the process of shrinking from shrinking and forming a hollow portion from deforming toward the inside of the ring body R in the process of forming the ring body R. belongs to. In other words, the support S is for restricting deformation of the portion (the ring body R itself in the present embodiment) forming the hollow portion in the ring body R in the middle of modeling to be deformed inside the ring body R. . These base part B and support S are set by the operator according to the shape of the three-dimensional structure.

  Next, the operator operates the external computer device 120 to generate processing data for producing a three-dimensional object by the optical modeling apparatus 100. Specifically, the operator instructs the external computer device 120 to generate machining data via the input device 121. As a result, the external computer device 120 generates processed data based on the generated image data by executing a program (not shown). In this case, the processing data includes the ring body R, the base portion B, and the support portion S represented by the image data as one three-dimensional structure, and the three-dimensional structure is divided into a plurality of layers in the horizontal direction. This is data representing the cross-sectional shape. In the present embodiment, the three-dimensional structure W is divided into layers having a thickness of about 30 μm in the horizontal direction.

  Next, the operator operates the external computer device 120 and instructs the stereolithography device 100 to produce a three-dimensionally shaped object. In response to this instruction, the external computer device 120 outputs the generated machining data to the controller 113 of the optical modeling device 100. Thereby, the optical modeling apparatus 100 starts manufacture of a three-dimensional molded item. Specifically, as shown in FIG. 4A, the controller 113 of the optical modeling apparatus 100 controls the operation of the liquid pump 106 to supply the photocurable resin 104 into the resin tank 105, and the lifting device The operation of the electric motor 109a at 109 is controlled to position the table 108 at a predetermined height from the upper surface of the film 102. In the present embodiment, positioning is performed such that the lower surface of the table 108 is positioned at a height of about 30 μm from the upper surface of the film 102. In addition, the quantity of the photocurable resin 104 supplied in the resin tank 105 is the quantity used as the depth deeper than the thickness (in this embodiment about 30 micrometers) for one layer which comprises a three-dimensional molded item.

  Next, the controller 113 controls the operation of the projector 111 to irradiate an image representing the cross-sectional shape of the first layer constituting the three-dimensional structure toward the lower surface of the table 108. As a result, the light curable resin 104 existing between the film 102 and the table 108 is selectively irradiated with light, and a three-dimensionally shaped object is formed on the lower surface of the table 108 as shown in FIG. The first layer F1 is formed. In this case, the first layer F <b> 1 formed on the lower surface of the table 108 is formed in a state where it is also fixed to the upper surface of the film 102 on the transparent substrate 101. Therefore, as shown in FIG. 4C, the controller 113 controls the operation of the electric motor 109a in the elevating device 109 to displace the table 108 upward, thereby forming the first formed on the lower surface of the table 108. The layer F1 is peeled off from the upper surface of the film 102. Then, the controller 130 lowers the table 108 again so that the lowermost position of the three-dimensional structure formed on the lower surface of the table 108 is set to a predetermined height position (about 30 μm in this embodiment) from the upper surface of the film 102. Position.

  Next, the controller 113 controls the operation of the projector 111 to irradiate an image representing the cross-sectional shape of the second layer constituting the three-dimensional structure toward the lower surface of the table 108. As a result, as shown in FIG. 4D, the second layer F <b> 2 constituting the three-dimensional structure is formed on the lower surface of the table 108. By repeatedly performing such positioning of the table 108, irradiation of the image by the projector 111, and peeling off the three-dimensional modeled object, the lower surface of the table 108 includes the ring body R, the base part B, and the support part S. The three-dimensional model is sequentially formed downward.

  FIG. 5A shows a state in which approximately half of the ring body R constituting the three-dimensional structure is formed by the optical modeling apparatus 100. During the formation of such a ring body R, a force is generated that causes the ring body R to contract and deform the ring body R inward. However, in the hollow portion inside the ring body R, a support S is formed together with the ring body R so as to support the inner peripheral surface R1 of the ring body R and resist deformation toward the inside of the ring body R. For this reason, the deformation | transformation toward the inner side of the ring body R is controlled. As a result, as shown in FIG. 5B, the inner peripheral surface of the ring body R is formed in a circular shape without deformation, and the ring body R is accurately shaped.

  When the modeling of the three-dimensional model is completed, the operator removes the three-dimensional model from the table 108 after removing the table 108 from the lifting device 109. Thereby, the production of the three-dimensional structure by the optical modeling apparatus 100 is completed. On the other hand, an operator removes the support part S formed in the internal peripheral surface R1 of the ring body R in a three-dimensional molded item while removing the base part B from the molded three-dimensional molded item. Thereby, the three-dimensional molded item which consists only of the ring body R is completed. FIG. 6 shows a three-dimensionally shaped object (in a state where it is detached from the table 108) according to this embodiment actually manufactured by the present inventor. As shown in FIG. 6, according to the support forming method of the present invention, the inner peripheral portion of the ring-shaped three-dimensionally shaped object is formed in an accurate circular shape.

  As can be understood from the above description of the operation, according to the above embodiment, when the ring body R formed with the hollow portion is formed, the portion forming the hollow portion in the ring body R (that is, the ring body R). The ring body R is formed while forming the support portion S that restricts its own deformation. Thereby, the deformation | transformation of the part which forms the hollow part in the ring body R in the middle of modeling of the ring body R is suppressed. As a result, the part which forms the hollow part in the ring body R can be accurately shaped into a circle, and the entire ring body R can be manufactured with high accuracy. Further, since the support S is formed on the inner peripheral surface of the ring body R, the support S can be manufactured in a state where the appearance of the ring body R is maintained.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

  For example, in the said embodiment, the support S was formed in the hollow part of the ring body R in the state connected to the internal peripheral surface R1 of the ring body R which comprises a three-dimensional molded item. However, the support S is not limited to the above embodiment as long as the deformation of the portion forming the hollow portion in the ring body R can be regulated. For example, as shown in FIG. 7A, a plate-like support S may be formed on both sides of the ring body R ′ constituting the three-dimensional structure. In this case, as shown in the figure, a deformation of the support S may be restricted, that is, a reinforcing portion SS for reinforcing the support S may be provided. Also by this, while being able to expect the same effect as the said embodiment, by providing the reinforcement part SS, the support part S can be formed more firmly and manufacture of a more accurate three-dimensional molded item is possible. Become. FIG. 7B shows a three-dimensional modeled object (in a state where it is detached from the table 108) according to this modification actually manufactured by the present inventors. As shown in FIG. 7B, according to the support forming method according to this modification, the side surface (portion surrounded by an ellipse) of the base R′1 formed on the upper portion of the ring body R ′ is formed vertically. Has been.

  Further, as shown in FIG. 8, two plate-like supports S may be formed on both sides of the ring body R ″ constituting the three-dimensional structure. According to this, since the ring body R ″ can be supported more firmly, it is possible to manufacture a three-dimensional model with higher accuracy.

  Moreover, in the said embodiment, although the support S was formed in plate shape about 0.2 mm thick, naturally it is not limited to this. The thickness and shape of the support S are appropriately determined according to the size and shape of the three-dimensional structure to be manufactured. For example, the support S may be formed by a set of bars extending in the horizontal direction. Further, as shown in FIG. 9, a shaft body that is formed in a disc shape in the hollow portion of the ring body R ′ ″ and that radially extends on the outer peripheral surface of the disc is formed on the inner peripheral surface R ′ ″ 1. You may form in the connected shape. That is, the support S may be intermittently connected to the inner peripheral surface R1 of the ring body R. Also by these, the same effect as the above embodiment can be expected.

  In addition, when providing the support S on the outer side of the three-dimensional structure, the support S is removed after the three-dimensional structure is formed by providing the support S along the outermost portion of the outer peripheral surface of the three-dimensional structure. It becomes easy. Similarly, when the support S is provided inside the three-dimensional object, the support S after the three-dimensional object is formed by providing the support S along the innermost part of the inner peripheral surface of the three-dimensional object. The removal work becomes easier.

  Moreover, in the said embodiment, although comprised so that a three-dimensional molded item might be modeled toward the downward direction from the lower surface of the table 108, naturally it is not limited to this. The present invention can be widely applied to a so-called stereolithography method for producing a desired three-dimensional model using a photocurable resin that is cured by irradiating light. Therefore, for example, it may be an optical modeling apparatus configured to model a three-dimensional modeled object from the upper surface of the table 108 upward. Also by this, the same effect as the above-mentioned embodiment can be expected.

1 is a schematic diagram of a partially broken configuration schematically showing an overall configuration of an optical modeling apparatus applied to a support forming method according to an embodiment of the present invention. (A) is a top view which shows the ring body which comprises a three-dimensional molded item, (B) is a side view of the ring body. It is explanatory drawing for demonstrating the shape of the three-dimensional molded item which consists of a ring body represented by image data, a base part, and a support part. (A)-(D) is explanatory drawing which showed typically the process in which a three-dimensional molded item is modeled with the optical modeling apparatus shown in FIG. (A) is explanatory drawing which shows typically the state by which about half of the ring body was modeled by the optical modeling apparatus shown in FIG. 1, (B) is the whole ring body modeled by the optical modeling apparatus shown in FIG. It is explanatory drawing which shows typically the state performed. It is a perspective image which shows the three-dimensional molded item actually modeled by this inventor. (A) is a perspective image which shows the other three-dimensional molded item actually modeled by this inventor, (B) is a partial expansion perspective image of the other three-dimensional molded item. It is a perspective image which shows the other three-dimensional molded item actually modeled by this inventor. (A) is a perspective image which shows the other three-dimensional molded item actually modeled by this inventor, (B) is a partial expansion perspective image of the other three-dimensional molded item. (A) is explanatory drawing for demonstrating the shape of the three-dimensional molded item which consists of a ring body represented by image data, a base part, and a support part, (B) is the prior art example actually modeled by this inventor. It is a partial expansion perspective image which shows a part of three-dimensional molded item by. (A) is explanatory drawing for demonstrating the shape of the three-dimensional molded item which consists of a ring body represented by image data, (B) is a part of the three-dimensional molded item by the prior art actually shape | molded by this inventor. FIG.

Explanation of symbols

R, R ', R' '... ring body, R1 ... inner peripheral surface, B ... base part, S ... support part, SS ... reinforcing part, 100 ... stereolithography apparatus, 101 ... transparent substrate, 102 ... film, 103 ... Wall body 104: Photocurable resin 105: Resin tank 106 Liquid tank 107 Storage tank 108 Table 109 Lifting device 109a Electric motor 110 Reflecting mirror 111 Projector 112 Objective lens 113 ... Controller 114 ... Interface 120 ... External computer device.

Claims (5)

A method of forming a support that supports the three-dimensional object when producing a desired three-dimensional object using a photocurable resin that is cured by irradiation with light,
When modeling the three-dimensional model having a hollow part,
A support forming method comprising: forming a support portion for restricting deformation of a portion forming the hollow portion in the three-dimensional modeled object together with modeling of the three-dimensional modeled object. The method of forming a support according to claim 1,
The said support part is formed in the both sides of the said three-dimensional molded item, respectively, The formation method of a support provided with the plate-shaped outer side support part resisting a deformation | transformation of the part which forms the said hollow part. In the formation method of the support according to claim 1 or 2,
The said support part is a formation method of a support provided with the plate-shaped inner side support part which resists a deformation | transformation of the part which is formed in the internal peripheral surface which forms the said hollow part in the said three-dimensional molded item, and forms the said hollow part. The method of forming a support according to any one of claims 1 to 3, further comprising:
A support forming method for forming a reinforcing portion for restricting deformation of the support portion together with the support portion. In the manufacturing method of the three-dimensional modeled object by the optical modeling method of manufacturing a desired three-dimensional modeled object using a photocurable resin that is cured by irradiating light,
When modeling the three-dimensional model having a hollow part,
The manufacturing method of the three-dimensional molded item characterized by forming the support part for controlling the deformation | transformation of the part which forms the said hollow part in the said three-dimensional molded item with modeling of the said three-dimensional molded item.