阅读说明：本技术 立体造型物及其制造方法 (Three-dimensional shaped object and method for producing same ) 是由 朴元锡 于 2021-02-04 设计创作，主要内容包括：本发明涉及一种立体造型物及其制造方法。根据本发明的一实施例,提供一种立体造型物的方法,包括如下步骤：制造分别具有与立体造型物的表面的一部分相同的表面形状的多个碎片模具；利用各个所述碎片模具来制造分别具有与所述立体造型物的表面的一部分相同的表面形状的多个外形部件；以及通过连接多个所述外形部件来形成立体造型物。(The present invention relates to a three-dimensional shaped object and a method for manufacturing the same. According to an embodiment of the present invention, there is provided a method of forming a three-dimensional object, including the steps of: manufacturing a plurality of chip molds each having a surface shape identical to a part of a surface of the three-dimensional object; manufacturing a plurality of outer shape members each having a surface shape identical to a part of a surface of the three-dimensional object by using the chip molds; and forming a three-dimensional shaped object by connecting a plurality of the outer shape members.)

1. A method for manufacturing a three-dimensional shaped object, comprising the steps of:

manufacturing a plurality of chip molds each having a surface shape identical to a part of a surface of the three-dimensional object (S30);

manufacturing a plurality of outer shape members each having a surface shape identical to a part of a surface of the three-dimensional shaped object using the respective chip molds (S40); and

a three-dimensional shaped object is formed by connecting a plurality of the outer shape members (S50).

2. A stereolithographic object manufacturing method according to claim 1,

the step of manufacturing the chip mold includes the steps of:

3D modeling a shape of the stereotypical object using a 3D modeling program;

dividing a surface of the stereotypical object into a plurality of regions using a 3D modeling program and modeling a chip mold for each divided region; and

the modeled chip mold is manufactured using a synthetic resin.

3. A stereolithographic object manufacturing method according to claim 1,

the step of manufacturing the profile component comprises the steps of:

heating the upper and lower surfaces of the synthetic resin plate having thermoplasticity simultaneously;

vacuum-adsorbing the heated synthetic resin panel to the chip mold; and

cutting out an area having the same shape as the surface shape of the chip mold from the synthetic resin plate material to form an outer shape member.

4. A method of manufacturing a stereolithographic object according to claim 3,

in the steps of simultaneously heating the synthetic resin plate material above and below, the synthetic resin plate material is heated at a temperature between 60 degrees celsius and 70 degrees celsius for 1 minute to 3 minutes.

5. A stereolithographic object manufacturing method according to claim 1,

the step of forming the stereotypical object further comprises the steps of: a plurality of reinforcing members are joined to the inner side surface of the outer member.

6. The method of manufacturing a stereolithographic object according to claim 5, further comprising the steps of:

a balance adjustment module (S70) is arranged in the inner space of the three-dimensional shaped object,

wherein, the balance adjustment module includes a weight and a cable coupled to the weight.

7. The method of manufacturing a stereolithographic object according to claim 5, further comprising the steps of:

a gas-retaining tube body (S60) is provided in the internal space of the three-dimensional shaped object,

wherein the gas-retaining tube body is formed by one or more balloons that at least partially fill the internal space of the three-dimensional shaped object.

8. A stereolithographic object manufacturing method according to claim 7,

a plurality of first magnets are arranged at preset positions in the internal space of the three-dimensional modeling object,

a plurality of second magnets that can be coupled to the respective first magnets by magnetic force are attached to an outer surface of the balloon.

9. A stereolithographic object produced by the production method according to any one of claims 1 to 8.

Technical Field

The present invention relates to a three-dimensional shaped object, and more particularly, to a method for manufacturing a three-dimensional shaped object capable of floating in the air, and a three-dimensional shaped object manufactured by the method.

Background

Recently, various three-dimensional shaped objects have been used in department stores, exhibition halls, and the like for the purposes of advertisement, beauty, and the like. The stereo-shaped object arranged on the ground and the stereo-shaped object arranged in the air of a large space attract the sight of visitors. The three-dimensional shaped object installed in the air is connected to a fixed cable extending from a ceiling, but is gradually replaced by a suspended three-dimensional shaped object in the air using helium gas due to space limitation and aesthetic problems.

In order to suspend a three-dimensional shaped object in the air by using helium gas, the shaped object is manufactured by using an outer member having a hollow light material, but there is a problem that it is difficult to maintain the balance of the shaped object in the air or to adjust the position of the shaped object. Further, even if the device is set in a state of being suspended in the air, it is difficult to move the device, and the utilization rate of the device is reduced. Therefore, there is a need for a floating three-dimensional shaped object that can be moved with its balance easily adjusted and that can be operated, and a method for manufacturing the same.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for manufacturing a lightweight three-dimensional shaped object that can be suspended in the air by an efficient method, and a three-dimensional shaped object manufactured by the method.

According to an embodiment of the present invention, there is provided a three-dimensional shaped object manufacturing method including the steps of: manufacturing a plurality of chip molds each having a surface shape identical to a part of a surface of the three-dimensional object; manufacturing a plurality of outer shape members each having a surface shape identical to a part of a surface of the three-dimensional object by using the chip molds; and forming a three-dimensional shaped object by connecting a plurality of the outer shape members.

According to an embodiment of the present invention, there is provided a method capable of more efficiently manufacturing a three-dimensional shaped object light enough to be suspended in the air.

Further, according to an embodiment of the present invention, by providing a balance adjustment module including a weight in the stereolithographic object and moving the weight, the stereolithographic object suspended in the air can be moved, and thereby, various performances of the stereolithographic object can be performed.

Drawings

Fig. 1 is a flowchart of a method of manufacturing a three-dimensional figure suspended in the air according to an embodiment of the present invention.

Fig. 2 is a perspective view of an exemplary three-dimensional shaped object.

Fig. 3, 4, and 5 are diagrams illustrating a modeling process of a fragment mold of an exemplary stereolithographic object.

Fig. 6 is a diagram illustrating an exterior member forming apparatus according to an embodiment.

Fig. 7 is a diagram illustrating a method of forming a profile component according to an embodiment.

Fig. 8 is a view for explaining a method of forming a three-dimensional shaped object by connecting outer shape members.

Fig. 9 is a diagram illustrating an exemplary method of disposing a gas-retaining tube body in a three-dimensional shaped object.

Fig. 10 is a diagram showing an exemplary configuration in which a balance adjustment module is provided in a three-dimensional shaped object.

Fig. 11 is a diagram illustrating the movement of the three-dimensional shaped object by the balance adjustment module.

Fig. 12 is a diagram showing an exemplary configuration in which a rotation module is provided in a three-dimensional shaped object.

Detailed Description

The above objects, other objects, features and advantages of the present invention can be easily understood by the accompanying drawings and the related preferred embodiments below. However, the present invention is not limited to the embodiments described herein, and may be embodied in other forms. Rather, the embodiments described herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In the present specification, in order to explain a positional relationship between constituent elements, terms indicating relative positions such as "upper", "lower", "left", "right", "front", "rear", and the like may not mean a direction or a position as an absolute reference, and may be relative terms used for convenience of explanation with reference to the respective drawings when explaining the present invention with reference to the respective drawings.

In the present specification, when a component a is connected (or coupled, fastened, attached, or the like) to another component B, it means that the component a is directly connected to the other component B or indirectly connected with a third component interposed therebetween.

In the drawings of the present specification, the length, thickness, or width of a component is exaggerated for effective explanation of technical contents, and the relative size of one component to another component may be different according to specific embodiments.

In this specification, the singular form of the constituent elements also includes the plural form unless specifically mentioned herein. The expressions "including …", "configured by …", and "formed by …" and the like used in the specification do not exclude the presence or addition of one or more other constituent elements than the mentioned constituent elements.

In the present specification, when the terms first, second, etc. are used to describe the components, the components should not be limited to these terms. These terms are only used to distinguish one constituent element from another constituent element. The embodiments described and illustrated herein also include complementary embodiments thereto.

The present invention will be described in detail below with reference to the accompanying drawings. In describing the following specific embodiments, numerous specific details are set forth in order to more particularly illustrate the invention and to provide an understanding. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. It should be mentioned in advance that in some cases, parts which are well known in the description of the invention and have no obvious relationship with the invention will not be described again in order to avoid confusion in the description of the invention.

Fig. 1 is a flowchart of a method of manufacturing a three-dimensional figure suspended in the air according to an embodiment of the present invention.

Referring to fig. 1, a method of manufacturing a stereotypical object according to an embodiment may include the steps of: three-dimensionally modeling a shape of the three-dimensional shaped object using a three-dimensional (3D) modeling program (S10); dividing the surface of the stereolithographic object into a plurality of regions by a three-dimensional modeling program and modeling chip molds for the respective divided regions (S20); manufacturing a chip mold modeled by a computer program using a material such as a synthetic resin (S30); manufacturing a plurality of outer shape members each having a surface shape identical to a part of the surface of the three-dimensional shaped object by using the manufactured chip molds (S40); a plurality of outer shape members are joined to form a three-dimensional shaped object (S50). And, may further include the steps of: forming an opening communicating with the internal space in a part of the surface of the three-dimensional object manufactured as described above, and providing a gas-retaining tube body in the internal space of the three-dimensional object through the opening (S60); and/or providing a balance adjusting module in an inner space of the three-dimensional shaped object (S70), and finally, sealing the opening portion to complete the three-dimensional shaped object (S80).

In a particular embodiment, in step S10, a three-dimensional (3D) modeling program is used to model a stereotypical object to be manufactured by a computer. For example, the modeling may be performed by using a 3D program such as "Zbrush" or "Blender" to stereoscopically transform the shape of a stereotypical object into 3D in a computer.

Subsequently, in step S20, the surface of the stereolithographic object is divided into a plurality of regions by a 3D modeling program, and the chip molds for the respective divided regions are modeled. The 3D modeling program used at this time may be the same as or different from the modeling program of step S10.

To aid in understanding the present invention, assume that an exemplary stereolithographic object 10 as shown in FIG. 2 is being manufactured. The three-dimensional shaped object 10 of fig. 2 is substantially hexahedral, and the upper surface 11 has a concave-convex shape. In order to manufacture such a three-dimensional shaped object 10, first, in step S10, the appearance of the three-dimensional shaped object 10 is modeled by a 3D modeling program.

Thereafter, in step S20, the outer surface of the stereolithographic object 10 is divided into a plurality of regions, and a chip mold of at least a part of the divided regions is modeled. The reason why the outer surface of the three-dimensional shaped object is divided into a plurality of regions is that, in step S40 described later, the same uneven shape as that of the surface of the chip mold is accurately transferred (transfer) to a light-weight sheet material such as polystyrene. Therefore, in the case where the surface of the stereolithographic object has a complicated step or unevenness, it is preferable that the surface be divided into a plurality of regions to form the chip molds for the respective divided regions. For example, in the three-dimensional shaped object 10 of fig. 2, since the upper surface 11 has a concave-convex shape, a chip mold is formed for the upper surface 11. However, it should be understood that since the surfaces of the left side surface 12, the right side surface 13, the front surface, the back surface, and the bottom surface of the three-dimensional shaped object 10 of fig. 2 are flat surfaces without irregularities or steps, it is not necessary to form a chip mold for each surface.

In order to form the chip mold of the upper surface 11 of the three-dimensional shaped object 10, as shown in fig. 3, an a-a' cross section is set by a 3D modeling program, and the three-dimensional shaped object 10 is cut based on the cross section to model the chip mold 20 as shown in fig. 4 (a). Since the upper surface 21 of the chip mold 20 has the same uneven shape as the upper surface 11 of the three-dimensional object 10 shown in fig. 2, the chip mold 20 is a "positive engraving" mold for the three-dimensional object 10. In the present specification, a chip mold having the same uneven shape as the uneven shape of the surface of the three-dimensional object is referred to as an engraving mold.

When the chip mold 20 is molded, as shown in fig. 4(a), the side face 21a surrounding the periphery of the upper face 21 may be modeled as a face cut perpendicularly from the corner of the upper face 21 (hereinafter, simply referred to as "cut face"). However, as shown in fig. 4(a), if the upper surface 21 and the side surface 21a are bent at a large angle (for example, 90 degrees), when a light plate material such as polystyrene is vacuum-adhered to the upper surface of the chip mold in step S40, which will be described later, the polystyrene plate material may be broken when the polystyrene plate material is bent at the corner portion of the upper surface by 90 degrees.

Therefore, in an embodiment, it is preferable that the side surface of the chip mold may be modeled as a shape gradually inclined downward from the corner of the upper surface. For example, fig. 4(b) shows the chip mold 20 in which the side surface is formed into the inclined portion 211. The upper surface 21 of fig. 4(b) has the same uneven shape as the upper surface 21 of fig. 4(a), but the side surface of fig. 4(b) is not a vertical cut surface, but is formed as an inclined portion 211 gradually descending outward. The inclined surface of the inclined portion 211 may be a flat surface or a gently curved surface. The inclination angle of the inclined portion 211 may vary according to the specific embodiment.

In an embodiment, in the step S20 of modeling the chip mold by the modeling program, the reinforcement part may be modeled along the cut surface of the chip mold. The reinforcing member is a member that is superimposed on the inner surface of the three-dimensional shaped object in order to reinforce the rigidity of the three-dimensional shaped object. In one embodiment, when the cut surface of the chip mold is modeled by a modeling program, the reinforcing member may be additionally modeled using the shape of the cut surface. The reinforcing member will be described later with reference to fig. 8, 9, and the like.

In addition, when modeling the chip mold, the chip mold may be modeled as an "intaglio" mold. For example, as shown in FIG. 3, a stereotypical object 10 may be cut along an A-A 'section in a 3D modeling program, and an engraved chip mold 20' may be modeled as shown in FIG. 5. The upper surface 21 'of the chip mold 20' has an inverted uneven shape of the upper surface 11 of the three-dimensional shaped object 10 of fig. 2. In the present specification, a chip mold having a concave-convex shape in which the concave-convex shape of the surface of a three-dimensional object is inverted is referred to as an "intaglio" mold. Further, as shown in fig. 5, when the chip mold 20' is modeled as a negative engraving mold, a slope portion 211' extending from a corner of the upper surface 21' and gradually descending may be modeled.

In the case where the chip mold is manufactured by modeling the chip mold using the intaglio mold, there is an advantage in that the operation of attaching the reinforcing member to the inner side surface of the stereolithographic object can be easily performed. That is, in step S40 described later, after forming the outer shape member of the three-dimensional shaped object by vacuum-sucking a light plate such as polystyrene onto the upper surface of the engraved chip mold, the reinforcing member may be attached to the outer shape member in a state where the outer shape member is directly placed on the engraved chip mold.

In the embodiment of fig. 3 to 5, the upper surface 11 of the three-dimensional shaped object 10 is modeled by one chip mold 20, 20', but when the shape of the irregularities of the upper surface of the three-dimensional shaped object is complicated and it is difficult to perform vacuum molding by one chip mold, a plurality of chip molds may be modeled by dividing into a plurality of regions. Also, it should be understood that although the chip mold is not modeled because the surfaces of the side surface and the lower surface of the three-dimensional shaped object 10 are flat in the embodiment of fig. 2, if the side surface or the lower surface has a concave-convex shape, the chip mold may be modeled for the surface having the concave-convex shape.

Referring again to fig. 1, after modeling the stereoscopic shaped object in step S20 for one or more chip molds, in step S30, chip molds are manufactured in accordance with the modeled chip mold shapes. For example, in the case where one chip mold in fig. 4(a), 4(b), and 5 is modeled in step S20, the chip mold thus modeled is manufactured as a real object using a material such as a synthetic resin.

In an embodiment, the manufacture of the chip mold may be performed manually by an operator. In another embodiment, the chip mold may be manufactured using an automated machine such as a CNC machine (computerized numerically controlled machine tool). For example, data of the chip mold modeled by the 3D modeling program may be input to a CNC machine tool, and the machine tool automatically processes a synthetic resin material such as a polystyrene foam to manufacture the chip mold.

As a material for manufacturing the chip mold, synthetic resin such as polystyrene foam may be used, but in alternative embodiments, other materials such as metal, clay, gypsum, and the like may also be used.

In the case of manufacturing the chip mold using the styrofoam, it is also possible to additionally perform a grinding work using a sandpaper or an air sander and/or a coating work of coating a coating agent on the surface of the chip mold, thereby smoothing the surface.

After the chip mold is manufactured in step S30, the exterior member is manufactured using the chip mold in step S40. In one embodiment, the profile member may be manufactured by vacuum suction using a vacuum forming apparatus, and in this case, for example, the following steps may be included: heating a thermoplastic synthetic resin sheet such as polystyrene; vacuum adsorbing the heated synthetic resin plate to the chip mold; and cutting out an area having the same shape as the concave-convex shape of the surface of the chip mold from the synthetic resin plate material separated from the chip mold after vacuum suction to form the exterior member.

In this regard, fig. 6 schematically shows an exemplary configuration of a vacuum forming apparatus that manufactures a profile member in a vacuum suction manner according to an embodiment. Referring to fig. 6, a vacuum forming apparatus 100 according to an embodiment may include a stage 110, an upper heating part 120, a lifting frame 130, and a sliding part 140 provided in apparatus frames 101 and 102. The stage 110 is a part supported by placing the chip mold, and includes suction nozzles 111 formed at predetermined intervals. The suction nozzle 111 is connected to a vacuum pump or the like for vacuum suction, and it is understood that the suction nozzle 111 is omitted in fig. 6.

The upper heating part 120 is a heating device for heating the plate material P such as polystyrene, and may be configured by, for example, infrared lamps or hot wires provided at predetermined intervals.

The lifting frame 130 is a frame that fixes the plate material P and can be lifted up and down. In one embodiment, the lifting frame 130 may include one or more fixing units (not shown) for fixing the edge of the plate material P to the lifting frame 130. The lifting frame 130 is configured to be vertically movable. For example, the lifting frame 130 may be moved in the vertical direction by a transfer unit such as a linear motor, and such a lifting device is omitted in fig. 6.

The slide portion 140 is a member provided to the frame 102 and is provided to be automatically or manually slidable in the horizontal direction. For the sliding operation of the sliding part 140, devices such as rollers or rails may be provided to the frame 102, and it is understood that these devices are omitted in fig. 6.

The sliding portion 140 includes a lower heating portion 141. The lower heating part 141 is a heating device that heats the lower surface of the plate material P, and may be configured by, for example, infrared lamps or hot wires provided at predetermined intervals.

The plate material P is a material for manufacturing a three-dimensional shaped object, and a light synthetic resin can be used so that the three-dimensional shaped object can be suspended in the air. In one embodiment, Polystyrene (PS) sheet is used as the sheet material P, and may have a thickness of 2mm to 10mm, for example. However, in alternative embodiments, other synthetic resin materials such as Polyethylene (PE), polypropylene (PP), acrylonitrile-butadiene-styrene (ABS) may be used, and in this case, the thickness of the sheet material may be different according to specific embodiments.

Fig. 7 schematically shows a process of manufacturing a profile member using the vacuum forming apparatus 100 described above. Referring to fig. 7(a), the plate material P is fixed to the elevation frame 130, and the elevation frame 130 is elevated to be positioned below the upper heating part 120. Then, the sliding portion 140 is moved to be disposed under the lifting frame 130, and thereafter, the upper and lower surfaces of the plate material P are simultaneously heated by the upper heating portion 120 and the lower heating portion 141. Since both surfaces of the plate material P can be sufficiently flexible by heating both surfaces but not one surface of the plate material P at the same time, the plate material P is easily deformed according to the shape of the chip mold during vacuum suction, and the plate material P can be prevented from being damaged during deformation.

In one embodiment, in the case of using the polystyrene sheet P, the sheet P is heated at a temperature of about 60 to 70 ℃ for 1 to 3 minutes. However, it is apparent that the heating temperature and the temperature maintaining time may vary depending on the kind or thickness of the plate material.

In addition, in the step of fig. 7(a), the chip mold 30 is placed on the stage 110 and fixed. The chip mold 30 shown in fig. 7(a) is manufactured as a real object from an intaglio chip mold (20' of fig. 5) modeled by a 3D modeling program. In one embodiment, a plurality of communication holes 30a may be formed in the chip mold 30. The communication hole 30a is a through hole penetrating the chip mold 30 in a vertical direction, and is preferably formed at a position communicating with the suction nozzle 111 of the stage 110. Therefore, when the chip mold 30 is placed on the stage 110, the suction force of the suction nozzle 111 may act on the upper face of the chip mold 30.

Thereafter, as shown in fig. 7(b), after both surfaces of the plate material P are sufficiently heated, the sliding portion 140 is slid to move to the outside of the frame 101. Thereafter, the lifting frame 130 is lowered, the upper surface of the chip mold 30 is pressed with the sheet material P, and vacuum suction is started. The suction force is applied to the plate material P by the suction nozzle 111 and the communication hole 30a, the plate material P heated to have sufficient flexibility is closely attached to the surface of the chip mold 30, and the concave-convex shape identical to the concave-convex shape of the upper surface of the chip mold 30 is transferred to the plate material P.

At this time, since the side surface of the chip mold 30 is formed as the inclined portion instead of the vertical cut surface, the plate material P adsorbed on the surface of the chip mold 30 can be prevented from being sharply bent, and the plate material P can be prevented from being damaged.

Then, the vacuum suction is terminated and the plate material P sucked to the chip mold 30 is removed, whereby the plate material P having the cross section shown in fig. 7(c) can be obtained. At this time, the middle portion 41 of the plate material P is a region having the same uneven shape as the upper surface of the chip mold 30, and a region 411 having the shape of the inclined portion of the chip mold 30 is formed around the middle portion. Accordingly, the exterior member 41 can be manufactured by cutting and removing the peripheral area 411.

By the method as described above, the outer shape member corresponding thereto can be manufactured in each of one or more chip molds, and thereafter, in step S50, the stereoshaped object is manufactured by joining the outer shape members. Fig. 8(a) schematically shows a three-dimensional shaped object formed by connecting a plurality of outer shape members 41, 42, 43, 44. In the embodiment of fig. 8(a), the profile member 41 is, for example, a profile member manufactured by vacuum forming in the manner described with reference to fig. 7. Since the remaining outer shape members 42, 43, 44 have flat surfaces without irregularities, the outer shape members 42, 43, 44 can be manufactured by simply cutting out the plate material P, for example.

For example, the joining of the outer shape members may be performed by abutting edge portions (corner portions) of the outer shape members adjacent to each other, and then bonding the abutted portions by adhesive bonding or tape bonding. In one embodiment, a plurality of reinforcing members 50 may be attached to the inside face of the profile member. The reinforcing member 50 is a member for improving the rigidity of the outer member, and may be provided on the inner surface of the outer member at predetermined intervals as necessary.

The material of the reinforcing member 50 is not limited, but in one embodiment, a synthetic resin material of the same or similar material as the profile members 41, 42, 43, 44 may be used. Referring to FIG. 8(b), the reinforcing member 50 has a thickness w of 5mm to 10mm and a height h of 1cm to 3 cm. However, according to the embodiment, the thickness and height of the reinforcing member 50 may exceed the above numerical range.

In one embodiment, the rigidity of the profile members may be increased by attaching a plurality of reinforcing members 50 to the inner side surfaces of the profile members 41, 42, 43, 44 in a parallel arrangement or in a crossing manner with each other.

In one embodiment, the reinforcing member 50 may be joined to the profile members 41, 42, 43, 44 by adhesive bonding or tape, and foamed polyurethane may be applied along the joining site of the reinforcing member 50 and the profile members thus joined. The foamed polyurethane is cured in the form of foam (foam) with the passage of time, thereby having strong adhesiveness and water resistance and further improving the rigidity of the stereomorphic object. In one embodiment, after the three-dimensional shaped object is manufactured by joining the external shape members, the coating agent may be thinly applied to the outer surface or the inner surface of the three-dimensional shaped object to increase the surface rigidity of the three-dimensional shaped object.

As described above, after the three-dimensional shaped object is manufactured in steps S10 to S50, for example, when the three-dimensional shaped object is to be floated in the air, step S60 of disposing the gas-retaining tube body in the three-dimensional shaped object may be performed.

Referring to fig. 9, the gas-retaining tube body 70 may be formed by one or more balloons that at least partially fill the internal space of the three-dimensional shaped object. In order to provide the gas-holding tube body 70 inside the three-dimensional shaped object, the insertion port 44a may be formed in one of the outer members (the lower outer member 44 of the three-dimensional shaped object in fig. 9). The gas-retaining tube body 70 is inserted into the three-dimensional shaped object through the insertion port 44a, and after a gas lighter than air, such as helium gas, is introduced into the gas-retaining tube body 70, the insertion port 44a is covered with a cover.

In one embodiment, the gas-retaining tube body 70 may be fixed inside the three-dimensional shaped object by a fixing unit such as a magnet, so that the gas-retaining tube body 70 may be fixed without moving inside the three-dimensional shaped object. In the embodiment of fig. 9, a plurality of first magnets 61 are provided at predetermined positions in the internal space of the three-dimensional shaped object, and a plurality of second magnets 71 capable of being coupled to the respective first magnets 61 by magnetic force are provided on the outer surface of the gas holder body 70. As the magnet, a neodymium magnet having light weight and strong magnetic force can be used. In alternative embodiments, it is apparent that the gas-retaining tube body 70 may be fixed to the inside of the stereolithographic object by any known fixing means, instead of the magnet.

The gas-retaining tube 70 may be formed of two or more balloons that can fill the internal space of the three-dimensional object. The balloons may be arranged and fixed to the divided regions of the inner space of the stereotypical object. By providing a plurality of air bags for each region inside a large three-dimensional shaped object, the levitation property can be maintained for a long time while ensuring the ease of manufacturing the gas-retaining tube body 70.

In an embodiment, after the three-dimensional shaped object is manufactured according to steps S10 to S50, step S70 of disposing the balance adjustment module in the three-dimensional shaped object may be further performed. The balance adjustment module plays a role in moving the stereolithographic object by moving the center of gravity of the stereolithographic object in a state where the stereolithographic object is suspended in the air.

Fig. 10 schematically illustrates an exemplary balance adjustment module 80 provided in an inner space of an arbitrarily shaped three-dimensional object 200. Referring to fig. 10, a balance adjustment module 80 according to an embodiment may include a housing 81, a motor 82, a cable 83, and a weight 84.

The weight member 84 may be a metal member having a predetermined weight, and is integrated with the cable 83. The cable 83 and the weight 84 may be disposed inside the tubular case 81. Both ends of the wire 83 are wound around a pair of rollers, respectively.

In one embodiment, one of the pair of rollers is coupled to a motor 82, and as the rollers are rotated by the drive of the motor 82, the cable 83 is wound and/or unwound and the weight 84 can move within the housing 81.

Although not shown in the drawings, in an embodiment, the balance adjusting module 80 may further include a battery and a communication part. The battery may provide power to the motor 82 and the communication section, which may communicate with an external wireless controller. Therefore, in a state where the stereolike object 200 is floating in the air, the operator can move the weight 84 by controlling the operation of the motor 82 in a wireless manner.

Fig. 11 illustrates an exemplary movement of a stereotypical object using the balance adjustment module 80. In the embodiment of fig. 11, the case of the balance adjustment module 80 is provided from the head to the foot of the astronaut-shaped solid figure 300 suspended in the air. As shown in fig. 11(a), when the weight 84 is located at the leg portion, the entire gravity center of the three-dimensional object 300 is located at the leg portion, and therefore the three-dimensional object 300 floats in the air in a state where the astronaut stands upright.

When the worker remotely controls the motor 82 to move the weight 84 to the middle position of the balance adjustment module 80, the gravity center of the stereolike object 300 moves to the middle, and thus the astronaut takes a lying posture as shown in fig. 11 (b). When the weight 84 is moved to the head of the astronaut by remote control by the operator, the gravity center of the stereolike object 300 moves to the head side, and therefore the astronaut rotates in an inverted posture as shown in fig. 11 (c).

As described above, the worker can adjust and rotate the posture of the three-dimensional shaped object suspended in the air by moving the position of the weight member 84 through the remote control, and can present the three-dimensional shaped object in various postures, thereby maximizing the exhibition effect and the utilization of the three-dimensional shaped object.

Also, in an alternative embodiment, a plurality of balance adjustment modules 80 may be provided within the three-dimensional object and arranged such that the longitudinal directions of the housings 81 of the respective balance adjustment modules 80 face different directions from each other. For example, in the case where three balance adjustment modules are provided in the stereolithographic object so as to be perpendicular to each other, the three weight members 84 can be independently moved in the longitudinal direction of each housing 81, thereby realizing a more diversified performance of the posture of the stereolithographic object.

In yet another alternative embodiment, the path that the weight 84 moves need not be straight, for example, the weight 84 may be configured to perform a curvilinear or circular motion.

In addition, in an embodiment, after the three-dimensional shaped object is manufactured according to steps S10 to S50, a step of providing a rotation module in the three-dimensional shaped object may be further performed. Fig. 12 schematically shows an exemplary configuration in which the rotation module 90 is provided in the three-dimensional shaped object 400. Stereosculpt 400 includes a bendable joint region 410. It is assumed that the joint region 410 is made of a flexible material such as Ethylene Vinyl Acetate (EVA) or the like.

In one embodiment, the rotation module 90 may include a rotation link 91 and a motor 92. The rotation link 91 may be a rod-shaped member, one end of which is directly or indirectly coupled to the driving shaft of the motor 92, and the other end of which is fixedly coupled to an arbitrary position inside the three-dimensional object 400. Although not shown, the rotation module 90 may further include a battery and a communication unit, and a worker may perform an operation of, for example, bending or spreading a portion of the stereolithography object 400 by rotating the rotation link 91 by remotely controlling the motor 92 from the outside.

As described above, it will be apparent to those skilled in the art that various modifications and variations can be made from the description of the present specification. Accordingly, the scope of the invention should not be limited to the described embodiments, but should be defined by the claims and the equivalents thereof.