JPH08150662A - Optical shaping apparatus and method using powder mixed photo-setting resin - Google Patents

Abstract

PURPOSE: To obtain an optical shaping apparatus capable of performing optical shaping while uniformly distributing a powder throughout a powder mixed photo-setting resin by applying vibration to the powder mixed photo-setting resin. CONSTITUTION: A powder mixed photo-setting resin is introduced into the tank 51 of an optical shaping apparatus and defoamed by evacuating the tank 51 by a vacuum device 60. Next, an elevator 53 is inserted in the tank 53 and vibration is applied to the powder mixed photo-setting resin by a vibrator 57. By this method, a powder is uniformly dispersed in the flowable photo-setting resin. Subsequently, the elevator 53 is fixed at a predetermined position and the photo-setting resin is irradiated with light in a desired shape to form one cured layer 52. Vibration is stopped during the irradiation with light. Then, the elevator 53 is raised by the quantity corresponding to a newly formed cured layer and, in the same vibration applying process and the same light irradiation process, the new cured layer is formed. A plurality of cured layers are stacked by repeating this operation to form desired three-dimensional cured matter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a powder-mixed photocurable resin, which is a fluid photocurable resin mixed with powder, and is irradiated with light while scanning light to form a photocurable layer. The present invention relates to a stereolithography apparatus for stacking layers to model a desired three-dimensional structure and a stereolithography method for modeling a three-dimensional structure using the apparatus.

[0002]

2. Description of the Related Art A stereolithography method for a three-dimensional structure includes irradiating a fluid photocurable resin with light to form a photocurable layer, and laminating a plurality of the photocurable layers to form a desired tertiary layer. There is a method of manufacturing the original structure. This modeling method is a method including the steps shown in the flowchart of FIG. 1 (Points for producing a three-dimensional model from CAD data, labor saving and automation, 1992.
September issue, pages 38-63; Shigeru Nagamori, design and production of micromachines by processing method using UV curable resin, mechanical design, 1992 pages 50-55; Satoshi Ikuta, Koso three-dimensional microfabrication, No. 5 times micromachine
Symposium materials pages 78, 79; 3D plotter using stereolithography laser, published by Nikkan Kogyo Shimbun). In this stereolithography method, first, a photocurable resin (S-
Introducing an elevator that can move up and down into 1) (S-2), move the elevator to a position with a constant layer thickness to obtain a desired photo-cured layer thickness, and fix it (S-3) to obtain a desired shape. Is planarly irradiated with light (S-4), and after the desired shape is obtained, the light irradiation is stopped (S-5). After that, the elevator is moved by a constant layer thickness that gives a desired photo-cured layer thickness (S-3), and the steps (S-4) and (S-5) are repeated. Until the desired three-dimensional structure is obtained, the above (S-
Steps 3), (S-4) and (S-5) are repeated to stack the photocurable layer. Then, the uncured photo-curable resin layer is washed (S-6), and post-exposure for completely curing the entire structure by irradiating the obtained three-dimensional structure with light (S-7). )I do.

The above-mentioned stereolithography method is mainly used for molding a three-dimensional structure made of only a photo-curable resin to produce a three-dimensional model. A three-dimensional structure made of such a photo-curable resin alone is used. However, it is difficult to form a structure having high strength and heat resistance.

As a method for solving this problem, it is possible to use a powder-mixed photocurable resin in which powder is mixed with a fluid photocurable resin, and the resin is irradiated with light to form a three-dimensional structure. It is disclosed (Japanese Patent Laid-Open No. 4-99203). When this method is used, the powdery material of metal or ceramic is mixed into the fluid photocurable resin, so that the characteristics such as strength and heat resistance can be improved.

However, since the flowable photocurable resin and the metal or ceramic powder mixed in the resin have different specific gravities, the powder mixed in the powder-mixed photocurable resin is a flowable photocurable resin. Due to the sedimentation in the liquid, the fluid photocurable resin and the powder are separated, and uniform dispersion cannot be obtained. Particularly, in the step of molding the three-dimensional structure by irradiating the powder-mixed curable resin with light, the three-dimensional structure is formed by curing the powder-mixed photo-curable resin and laminating the cured product layer by layer. Therefore, the modeling time may take several hours. Therefore, it is very difficult to keep the powder dispersion constant. This means that SUS316L powder (average particle size 8 μm, specific gravity 7.8) and fluid photocurable resin (viscosity 2
In the case of the powder-mixed photocurable resin prepared by kneading 0 mPa · s and the specific gravity of 1.07), as shown in Table 1, after 30 minutes, it was already 30%.
It is also clear from the result that the powders settled in% and the powders settled almost completely after 60 minutes.

[0006]

[Table 1]

In addition to the above-mentioned problems, the stereolithography method using the powder-mixed photo-curable resin has the following problems.

When the amount of the powder mixed in the powder-mixed photo-curable resin is increased, the powder blocks the light and a cured layer having a predetermined thickness cannot be obtained, so that a powder-mixed resin molded body having a desired shape can be obtained. Sometimes there is not. When the powder-mixed photo-curable resin has a high viscosity, the powder-mixed photo-curable resin does not easily flow into the stereolithography device when the process proceeds to the stereolithography step (S-14), and it takes time for the transition. Also, it takes time for the modeling process.

Further, when a powder-mixed photocurable resin is used,
By forming the three-dimensional structure by light irradiation and then removing the photocurable resin by burning or the like, it becomes possible to manufacture a shaped article of a metal or ceramic material having a desired shape. The outline of this method will be described below with reference to the flowchart of FIG. First, a fluid photocurable resin (S-
11), the powder material (S-12) is mixed and kneaded (S-1
After 3), the step of irradiating light with an optical modeling apparatus to model a desired three-dimensional structure (S-14) is performed. After that, the resin component in the resin forming body is burned and removed (S-15), and the molded product from which the resin component is removed is sintered at high temperature (S-16) to form a structure of metal or ceramic material. To do. Further, in this method, a powder mixed resin layer in which the mixing ratio of metal or ceramic components is changed is photocured and laminated to form a resin molded body having a desired shape, and then the resin molded body is heated in a high temperature atmosphere. It is possible to provide an optical molding method characterized in that the resin component is burned and removed by heating (S-15), and the functionally gradient material having a desired shape is formed by sintering.

However, this method also has the same problems as in the case of producing a three-dimensional structure using the above-mentioned powder-mixed photocurable resin. In addition to this problem, the amount of powder mixed When the ratio is decreased, the shape retention of the three-dimensional structure is deteriorated in the burning (S-15) step and the sintering (S-16) step, and the sintered body cannot be manufactured.

On the other hand, the three-dimensional structure forming method using the powder-mixed photocurable resin includes a regulated liquid level method shown in FIG. 3 and a free liquid level method shown in FIG. Academic Lectures Proceedings 2nd Volume, 581 pages, Study on stereolithography using powder-containing photocurable resin (2nd report))
There is.

In the regulated liquid level method shown in FIG. 3, the powder 25 introduced into a tank 22 equipped with an elevator 21, a tape 23 for peeling off the cured powder-mixed photocurable resin, and a glass 24 that transmits light. The liquid photocurable resin 26 containing is irradiated with light from the bottom of the tank through the glass 24 to cure the powder mixed photocurable resin. In this method, the powder settles on the bottom surface of the tank and a powder layer is formed, so that the elevator 21 cannot descend to the desired position 27, and there is a problem that stereolithography cannot be performed.

In the free liquid level method shown in FIG. 4, the screw-type stirrer 31 is used to stir the powder-mixed curable resin so that the powder in the photocurable resin does not settle, and the laser beam 32 is powdered. Irradiation is performed from the upper surface of the mixed photo-curable resin 33 (the powder is not shown). In this method, elevator 3
Since 4 is in the center of the tank 35, the screw-type stirrer 31 cannot be located in the center, and only partial stirring can be performed. Particularly, powder-mixed curable resin 3
When the content of the powder of No. 3 becomes high, the viscosity becomes high, and stirring other than around the screw portion 36 becomes impossible. Further, the powder-mixed photocurable resin 3 is mixed with the screw-type stirrer 31.
Since a vortex is generated on the upper surface of No. 3, it is necessary to wait until the vortex disappears before performing the light irradiation, and there is a problem that it takes time for modeling. Further, if it takes time until the above-mentioned vortex disappears, there is also a problem that the powder is settled and the powder is not uniformly dispersed. Further, the agitation by the screw 36 causes bubbles in the powder-mixed photocurable resin 33, and the bubbles rise to the liquid surface, so that there is a problem that the bubbles enter the resin layer cured by light irradiation.

[0014]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and a first object of the present invention is to allow a fluid photocurable resin to contain powder such as metal or ceramic material. In a method of modeling a three-dimensional structure using the powder-mixed photocurable resin, it is an object of the present invention to provide a stereolithography device that can perform stereolithography while uniformly distributing the powder in the powder-mixed photocurable resin. The present invention also provides a three-dimensional stereolithography method using the stereolithography apparatus.

[0015]

The above objects can be solved by the devices and methods described in (1) to (3) below.

(1) A powder-mixed photocurable resin prepared by mixing powder with a fluid photocurable resin is irradiated with light while scanning light to form a photocurable layer, and a plurality of photocurable layers are formed. In a stereolithography apparatus for stacking layers to fabricate a three-dimensional structure, a housing means for housing the powder-mixed photocurable resin, and a support means arranged in the housing means and on which the photocurable layer is formed. A light irradiating means for irradiating the powder-mixed photo-curable resin of the accommodating means with light so as to cure the powder-mixed photo-curable resin near the supporting means, and a vibration for vibrating the powder-mixed photo-curable resin An optical modeling apparatus comprising: a means and a defoaming means for removing bubbles existing in the powder-mixed photocurable resin.

(2) A powder-mixed photocurable resin obtained by mixing powder with a fluid photocurable resin is irradiated with light while scanning light to form a photocurable layer, and a plurality of photocurable layers are formed. In a stereolithography device for stacking layers to fabricate a three-dimensional structure, accommodating means for accommodating the powder-mixed photocurable resin,
The powder-mixed photo-curable resin in the storage means is irradiated with light so as to cure the powder-mixed photo-curable resin disposed in the storage means and formed by the photo-curable layer and the support means in the vicinity of the support means. An optical modeling apparatus comprising: a light irradiating unit for controlling the powder mixed photocurable resin; a vibrating unit for vibrating the powder mixed photocurable resin; and a cooling unit for cooling the powder mixed photocurable resin.

(3) A powder-mixed photocurable resin obtained by mixing powder with a fluid photocurable resin is irradiated with light while scanning light to form a photocurable layer, and a plurality of photocurable layers are formed. In the stereolithography method for stacking layers to fabricate a three-dimensional structure, a kneading step of mixing a monastic photocurable resin and a predetermined powder material to obtain a powder-mixed photocurable resin, and a fluid photocurable resin A housing step of housing the housing means together with the supporting means, and a light irradiation step of irradiating the powder-mixed photocurable resin housed in the housing means with light while scanning the light to form a photocurable layer on the supporting means. And a moving step of intermittently moving the supporting means at a predetermined distance so as to form a three-dimensional structure by stacking a plurality of the photocurable layers.
And a vibrating step of vibrating the powder-mixed photo-curable resin.

In the present invention, the powder-mixed photo-curable resin is a fluid photo-curable resin mixed with powder and, if necessary, a reactive diluent, a photopolymerization initiator and the like. Say.

In the present invention, the powder means a powder which can be added to a photocurable resin such as metal powder, ceramic powder, fiber and whiskers to improve strength and heat resistance.

The present invention will be described in more detail below.

First, the first invention will be described. According to the first aspect of the present invention, the powder-mixed photocurable resin obtained by mixing powder with a fluid photocurable resin is irradiated with light while scanning light to form a photocurable layer. In a stereolithography apparatus for stacking a plurality of layers to fabricate a three-dimensional structure, the stereolithography apparatus has means for vibrating the powder-mixed photocurable resin and defoaming means. Provided.

FIG. 5 shows an embodiment of a stereolithography apparatus using the powder-mixed photocurable resin of the present invention. The stereolithography apparatus according to this aspect is based on the regulated liquid level method. This will be described below with reference to FIG. In FIG. 5, the fluid photocurable resin and the powder contained in the cured layer are not shown.

The stereolithography apparatus of the present invention comprises a tank 51 containing a powder-mixed photo-curable resin 50, an elevator 53 for fixing the resin 52 cured by light irradiation, and a tape 54 for peeling the cured resin 52. Further, the stereolithography device including the glass 55 that transmits light, and the light source 56 is further provided with a device 57 and a defoaming device for vibrating the powder-mixed photocurable resin.

The device for applying vibration to the powder-mixed photo-curable resin is an actuator for applying vibration, for example, a sound wave or ultrasonic wave generator. In FIG. 5, the device for applying the vibration is arranged on the side surface of the tank, but the present invention is not limited to this, and may be arranged, for example, on the bottom of the tank or the elevator (FIG. 6). One or more vibration applying devices can be attached. When a plurality of pieces are mounted, they are preferably arranged on the side surface or the bottom surface, and are preferably arranged asymmetrically in order to improve efficiency. When the vibration applying device is attached to the tank, it may be fixed to the tank or detachably attached.

In the apparatus of the present invention, the elevator is provided in the tank as a supporting means on which the photo-curable layer is formed.

In the regulated liquid level method, the thickness of the photocurable layer is
It is regulated by light-transmitting glass and an elevator located on the bottom of the tank. Further, the elevator can be moved up and down by an actuator (not shown) provided in the tank information. Furthermore, the cured resin is
Since it adheres to the elevator, it can be moved together with the elevator.

The light source 56 that can be used in the present invention may be an X-ray light source, an ultraviolet light source, a visible light source or the like, although it depends on the powder-mixed photo-curable resin.

The light transmissive glass usable in the present invention is
Depending on the light used to cure the powder-mixed photocurable resin, quartz glass or the like can be used when irradiating with ultraviolet rays or visible light.

The tape 54 for peeling off the cured powder-mixed curable resin is preferably a Teflon tape or the like which transmits light and has low wettability.

The stereolithography apparatus of the present invention comprises a defoaming device. The defoaming device includes a cover 58 for sealing the tank 51, a packing 58 for keeping airtightness between the cover 58 and the elevator 53, a vacuum device 60 for reducing the pressure in the tank, and the vacuum device 60 and the tank. It is composed of a pipe 61 for communicating with 51. The cover 58, the packing 59, and the pipe 61 are not particularly limited as long as the inside of the tank can be kept at a reduced pressure, but a material such as urethane rubber is preferable. As the vacuum device, a commonly used vacuum pump (for example, an oil diffusion pump) can be used.

The stereolithography apparatus of the present invention may further include a control device 62 for preventing vibration during light irradiation. As shown in FIG. 5, the control device 62 includes an elevator 53, a light source 56, and a device 5 for applying vibration.
7 and the defoaming device 60. The control device 62 can automatically control the elevator 53, the light source 56, the vibration applying device 57, and the defoaming device 60, and the vibration can be automatically stopped at the time of light irradiation. Further, by using the control device 62, it is possible to control so as to apply vibration to at least one step other than the time of light irradiation. For such a control device, for example, a microcomputer can be preferably used. This controller 62
Can be similarly installed in the regulated liquid level method including a device for vibrating the elevator in FIG. 6 (the control device is not shown in FIG. 6).

In the present invention, various powders are mixed with a flowable photocurable resin, and a powder-mixed photocurable resin containing a hardener as needed is used. The photocurable resin is not particularly limited as long as it can be cured by light such as X-rays, ultraviolet rays, or visible light.

For example, acrylic resin, epoxy resin and the like can be mentioned. Specifically, it is a monomer or oligomer having an acryloyl group, and depending on the molecular structure constituting the skeleton thereof, polyester acrylate, polyurethane acrylate, epoxy acrylate, polyether acrylate, silicon acrylate, oligo acrylate and the like can be mentioned.

In the present invention, the above photopolymerizable resins may be used alone or in combination.

As the polymerization initiator, acetophenone-based polymerization initiators such as dihydroxyacetophenone and 2-hydroxy-2-methyl-1-phenylpropan-1-one,
Examples include benzoin ether-based polymerization initiators such as isobutyl benzoin ether and isopropyl benzoin ether, benzyl ketal-based polymerization initiators such as benzyl methyl ketal and 1-hydroxycyclohexyl phenyl ketone, and ketone-based polymerization initiators such as benzophenone and 2-chlorothioxanthone. is there.

The flowable photocurable resin is prepared by mixing the photopolymerizable resin with a photoinitiator, if necessary.

The powder which can be used in the present invention includes fibers, whiskers, metal powder, ceramic powder and the like. Specifically, there are alumina, silica, stainless steel, copper, PZT, and aluminum. In the present invention, it is particularly preferable to use alumina.

The powder-mixed photocurable resin of the present invention is prepared by mixing the above-mentioned fluid photocurable resin with the above powder. The mixing ratio in volume of the fluid photocurable resin and the powder is preferably 25% to 48% with respect to the fluid photocurable resin. However, it may be out of this range depending on the photocurable resin and powder.

Next, a stereolithography apparatus by the free liquid level method which is the second embodiment of the present invention will be described with reference to FIG. 7 (in the following description, the powder photocurable resin of FIGS. 7, 8 and 9 will be used. Contains powder, but not shown). As shown in FIG. 7, the stereolithography apparatus according to the second aspect includes a tank 71 containing a powder-mixed photocurable resin 70, an elevator 73 for stacking a resin 72 cured by light irradiation, and shaping the resin 72.
And a stereolithography apparatus including a glass 74 that transmits light,
Further, a device 7 for applying vibration to the powder-mixed photo-curable resin
5 and a defoaming device. The tank 71, the elevator 73, the glass 74 that transmits light, the device 75 for giving vibration, the cover 76 as a defoaming device, the packing 77, the vacuum device 78 and the pipe 79 of the stereolithography device of the second aspect, and The light source 80 may be the same as that described in the first embodiment. Further, the device for applying the vibration may be installed on the side surface, the bottom surface or the elevator of the tank (FIG. 8) as in the first embodiment.

Also in this second mode, a control unit 84 which is exactly the same as the control unit described in the first mode for not applying vibration during light irradiation can be installed (FIG. 7). Further, this device can be installed in the device of the embodiment of FIG. 8 as well (the control device is not shown in the drawing).

In the third aspect of the first invention, a light irradiation section 81 is further provided in the second aspect, and the light irradiation section 81 and an actuator 82 for moving up and down the elevator are installed in a sealed tank. (FIG. 9). Light source 80
The light irradiation unit 81 and the light irradiation unit 81 are connected by an optical fiber 83. The light irradiation unit 81 includes an actuator that moves one end of the optical fiber, and the optical fiber is moved by this actuator to irradiate the light of the stereolithography pattern. As the tank 71, the elevator 73, the vibration giving device 75, and the defoaming device of the stereolithography apparatus of the third aspect, those described in the first aspect can be used as they are. Also, the installation for giving vibration can be installed as described in the first embodiment.

Further, a control device 84 which is exactly the same as the control device which does not apply vibration during light irradiation described in the first aspect may be installed.

The first aspect of the present invention may further include a cooling means described later.

The second invention of the present invention will be described.

The second invention is to form a photo-curable layer by irradiating a powder-mixed photo-curable resin obtained by mixing a fluid photo-curable resin with powder while scanning light to form a photo-curable layer. A stereolithography apparatus for stacking a plurality of layers to fabricate a three-dimensional structure, the stereolithography apparatus comprising means for vibrating the powder-mixed photocurable resin and cooling means. It is a device.

FIG. 10 shows an embodiment of a stereolithography apparatus using the powder-mixed photocurable resin of the present invention. The stereolithography apparatus according to this aspect is based on the regulated liquid level method. This will be described below with reference to FIG. In FIG. 10, the powder-containing curable resin contains powder, but is not shown.

In the stereolithography apparatus of the second invention, a tank 51 containing the powder-mixed photo-curable resin 50, an elevator 53 for fixing the resin 52 cured by light irradiation, and a stripping of the cured resin 52. In the stereolithography device equipped with the tape 54, the glass 55 that transmits light, and the light source 56,
Further, a device 5 for applying vibration to the powder-mixed photocurable resin
7 and a cooling device 63. In the present invention, a cooling device is installed in order to prevent the powder-mixed photo-curing resin from being hardened by heat generated by vibration.

Of the above-mentioned structure, except for the cooling device, it is the same as the device described in the first invention.

The cooling device which can be used in the second invention is shown in FIG.
It may be installed on the bottom of the tank, as shown in 0 and 11, or on the side of the tank.

The cooling device can preferably use a Peltier element. The Peltier device measures the temperature of the powder-mixed photo-curable resin with a sensor (not shown) and enables temperature control with electric energy. Since the shape of the Peltier element can be reduced, even if a small tank is used, it can be effectively attached to the bottom surface of the tank.

Also for the second invention, the same first and second aspects as those of the first invention can be implemented (FIG. 10).
To 12).

Also, in the second invention, a control device 62 which is exactly the same as the control device for preventing vibration during light irradiation described in the first invention can be installed.

Next, the third invention will be described.

A third invention is a three-dimensional modeling method of a powder-mixed photocurable resin using the apparatus of the first or second invention. One aspect of the third invention will be described with reference to the flowchart shown in FIG.

First, a fluid photocurable resin (S-10
0) is prepared. As the fluid photocurable resin, a commercially available product can be used as it is.

The fluid photocurable resin (S-100) is kneaded with the powder (S-101) (S-102). The kneading method is not particularly limited, but a stirring / defoaming machine that performs defoaming and kneading at the same time or a centrifugal defoaming machine can be preferably used. The obtained powder-mixed photocurable resin is introduced into the tank of the stereolithography machine (S-103). For the introduction, for example, a method of pouring slowly so that air bubbles do not enter from the end of the tank can be used. It is also possible to introduce it into the tank using a syringe. The present invention is not limited to these methods, and the powder-mixed photocurable resin can be introduced by various methods.

Next, a three-dimensional structure is formed by an optical forming apparatus (this corresponds to the step using the optical forming machine in FIG. 16).
The elevator is inserted into the tank (S-105), and the powder-mixed photocurable resin is vibrated by the means for giving the vibration (S-106). As a result, the powder is uniformly dispersed in the fluid photocurable resin.

The effect of applying this vibration is shown in FIG.
And 15 will be schematically described.

FIG. 14 shows a state in which the powder-mixed curable resin 141 is introduced into the tank 140.
Has settled at the bottom of the tank. When vibration is applied by the vibration applying means 143 in this state, the precipitated powder 142 is uniformly dispersed in the resin by the vibration as shown in FIG.
At this time, heat may be generated due to vibration, so
Adjust the vibration applying device so that heat generation is minimized and vibration is efficiently applied. If necessary, a cooling device may be installed.

Next, the elevator is moved to a predetermined position, that is, the thickness of the hardened layer (S-107). For example, in the regulated liquid level method, one layer of the cured layer is fixed from the surface of the glass 146 installed on the bottom surface. Further, in the free liquid level method, the powder-mixed photo-curable resin is fixed to one layer of the cured layer from the upper surface. It is preferable to apply vibration during the movement of the elevator (S-108). This is because the thixotropic property allows the elevator to be moved in a state where the viscosity is lowered, so that it is not necessary to use an expensive high torque elevator moving device.

After fixing the elevator, a desired shape is irradiated with light to form a hardened layer for one layer (S-109).
In the present invention, the vibration can be applied during the light irradiation, but the vibration is stopped in the light irradiation step so that the cured product is not deformed or the dimensional accuracy is not reduced (S-110). ) Is preferred. Even if the vibration is stopped at the stage of light irradiation, there is no particular problem because the powder does not settle immediately. That is, since the powder-mixed photo-curable resin is agitated by vibration, the resin surface is more likely to be flattened as compared with the agitation by a screw, and the time from the vibration is stopped to the light irradiation can be shortened. Therefore, since the light irradiation can be performed in a state where the powder does not settle so much, a uniform three-dimensional structure can be formed.

Next, when the resin is cured into a desired shape, the light is stopped (S-111). Vibration is added again at this stage,
The powder is dispersed uniformly (S-112). (S
The steps from -107) to (S-112) are repeated until a desired three-dimensional structure is formed. Although it is illustrated in FIG. 13 that vibration is applied in all steps other than the light irradiation step, the present invention is not limited to this, and vibration may be applied in at least one step.

Each process by the above-mentioned optical molding machine can be carried out while defoaming, if necessary. Defoaming is
This is performed by using the apparatus of the present invention described above and reducing the pressure in the tank with a vacuum pump or the like. Decompression degree in the tank is
Although not particularly limited, 0.15 to 0.01 mmHg is preferable. Further, when defoaming, since vibration is performed in at least one step of each step of molding the three-dimensional structure,
It is preferable to carry out continuously during stereolithography.

After the desired shape is formed, the elevator is taken out of the tank (S-113), and vibration is applied inside the tank (S-114). The reduced pressure is released, the three-dimensional structure is taken out (S-115), washed (S-116) and post-exposed (S-117) to obtain the desired three-dimensional structure.

In this embodiment, the step (S-102) of kneading the fluid photocurable resin and the powder is provided, but in the present invention,
It is not always necessary to provide this step, and the fluid photocurable resin and powder are directly introduced into the tank and vibration is applied (S
-118) may be used (see the flow chart of FIG. 16).

[0067]

In the stereolithography apparatus using the powder-mixed photocurable resin of the present invention, the powder-mixed photocurable resin obtained by mixing the powder with the fluid photocurable resin is irradiated with light while scanning the light. The powder-mixed photo-curable resin is cured to form a photo-cured layer, and a plurality of the photo-cured layers are stacked to form a three-dimensional structure. Storing means for storing the powder-mixed light in the storing means so as to cure the powder-mixed photocurable resin in the vicinity of the support means A light irradiating means for irradiating the curable resin with light, a means for vibrating the powder-mixed photo-curable resin, and a defoaming means and / or a cooling means are further provided for these means. .

A three-dimensional structure is manufactured using the stereolithography apparatus having the above structure. First, the supporting means is inserted into the accommodating means, and the powder-mixed photocurable resin is vibrated by means of vibration to uniformly disperse the powder in the fluid photocurable resin.

Next, the supporting means is moved at a predetermined position, that is, by the thickness of the hardened layer, and the desired shape is irradiated with light to form a hardened layer for one layer. During the irradiation of light, it is preferable to stop the vibration so that the cured product is not deformed or the dimensional accuracy is not reduced. The light is stopped once the resin has cured to the desired shape. The process of moving the elevator to a predetermined position and the process of light irradiation are repeated until a desired three-dimensional structure is formed. During modeling of the three-dimensional structure, defoaming and / or cooling are performed as necessary.

After the desired shape is formed, the elevator is taken out of the tank, the reduced pressure is released, the three-dimensional structure is taken out, washed and post-exposed to obtain the desired three-dimensional structure.

[0071]

EXAMPLES The present invention will be described in more detail based on the following examples.

Example 1 (i) Stereolithography apparatus using powder-mixed photo-curable resin The apparatus of this example is shown in FIG. The present embodiment is an example of a stereolithography apparatus using the regulated liquid surface method. The stereolithography apparatus in FIG. 5 has a tank 51 that contains the powder-mixed photo-curable resin 50, and an opening for taking in light from a light source 56 is provided at the bottom of the tank. The part is closed with a glass 55 that transmits light so that the powder photocurable resin does not leak out. The transparent glass is preferably quartz glass. A tape (light-transmissive one) 54 for removing the cured resin (cured layer) 52 is provided on the inner surface of the glass that transmits the light. The tape is preferably a transparent Teflon tape. With this tape, the obtained three-dimensional structure can be easily peeled off. Furthermore,
A device 57 for applying vibration to the powder-mixed photo-curable resin is installed on the side surface of the tank 51. The device for giving this vibration is not particularly limited as long as it gives vibration so that the powder component (not shown) of the powder-mixed photocurable resin 50 is uniformly dispersed in the powder-mixed photocurable resin. A sound wave generator or an ultrasonic wave generator is preferable. Further, although it is possible to install only one device 55 for applying vibration, it is preferable to install a plurality of devices 55 asymmetrically on the side surface of the tank in order to apply vibration efficiently. Furthermore, FIG.
In the above, the device 57 for applying vibration is arranged on the side surface of the tank, but it may be arranged on the bottom surface of the tank. In addition, the vibration applying device 57 may be fixed to the tank or may be detachably installed. An elevator 53 for defining the thickness of the cured layer 52 of the powder-mixed photo-curable resin is inserted in the tank. The elevator may have various shapes, and for example, one having a T-shaped cross section as shown in FIG. 5 can be used. The elevator has an actuator (not shown) provided at the upper end
It is possible to move up and down.

A defoaming device is installed above the tank constructed as described above. The defoaming device includes a cover 58 for sealing the tank 51, a packing 59 for maintaining airtightness between the cover 58 and the elevator 53, a vacuum device 60 for reducing the pressure in the tank, and a vacuum device 60 and the tank 51.
It is composed of a pipe 61 for communicating with and. A hole is provided in the cover 58 so that the elevator can move up and down, and a packing 59 is attached to the hole so that the inside of the tank is airtight. The pipe 6 is provided at one end of the cover 58.
1 is attached and connected to the vacuum device 60. The inside of the tank is depressurized by this vacuum device.

Further, the device of the present invention may be provided with a control device 62 for preventing the vibration when the light is irradiated. The control device 62 includes an elevator 53, a light source 56,
It is connected to a vibration applying device 57 and a defoaming device 60. The control device 62 can automatically control the elevator 53, the light source 56, the vibration applying device 57, and the defoaming device 60, and the vibration can be automatically stopped at the time of light irradiation. Further, by using the control device 62, it is possible to control so as to apply vibration to at least one step other than the time of light irradiation. A microcomputer or the like can be used as such a control device.

(Ii) Method for forming three-dimensional structure using powder-mixed curable resin UV curable resin 3042 made by ThreeBond and average particle size 3
After the alumina powder of μm was kneaded by a stirring and defoaming machine, the obtained powder-mixed photocurable resin was introduced into the tank of the stereolithography machine. The introduction was carried out, for example, by pouring slowly so that air bubbles did not enter from the end of the tank. Next, in order to remove air bubbles in the powder-mixed photo-curable resin, the device of the present invention was used to degas the inside of the tank by depressurizing it with a vacuum pump. The degree of vacuum in the tank was 0.09 to 0.1 mmHg.

Next, a three-dimensional structure was modeled by an optical modeling apparatus (see FIGS. 17 to 19; the defoaming apparatus is not shown in these figures). Insert the elevator into the tank,
Vibration was applied to the powder-mixed photo-curable resin by the means for applying the vibration (FIG. 17). Thereby, the powder was uniformly dispersed in the fluid photocurable resin. This vibration was continuously applied during the formation of the three-dimensional structure except for the step of light irradiation. The vibration is appropriately adjusted so that the powder photocurable resin does not cure by heat.

Next, the elevator was fixed at a predetermined position, that is, from the surface of the glass 55 installed on the bottom surface to one layer of the hardened layer. Specifically, from the glass surface installed on the bottom surface to 0.
It was fixed above 02 mm. It is preferable to apply vibration during the movement of the elevator.

Next, light was irradiated in a desired shape to form a cured layer for one layer (FIG. 18). In the present invention, the vibration is stopped during the irradiation of light so that the cured product is not deformed or the dimensional accuracy is not reduced. Even if the vibration is stopped at the stage of light irradiation, the powder does not settle immediately, so
There was no particular problem. When the resin was cured to the desired shape, the light was stopped and vibration was applied again. Next, the elevator was raised by the amount of the newly formed hardened layer. At this time, since the hardened layer has already been hardened and bonded to the elevator, it rises together with the elevator (FIG. 19).

Next, a new hardened layer is formed so as to adhere to the lower part of the hardened layer in the same vibration applying step and light irradiation step. By repeating this operation and stacking a plurality of cured layers, a desired three-dimensional cured product can be formed.

After the desired shape was formed, the elevator was taken out of the tank and the inside of the tank was vibrated. The reduced pressure was released, the three-dimensional structure was taken out, washed and post-exposed to obtain the desired three-dimensional structure.

Naturally, various modifications can be made to this embodiment. For example, in the present embodiment, the step of kneading the fluid photocurable resin and the powder was provided, but in the present invention, it is not always necessary to provide this step, and the fluid photocurable resin and the powder are directly stored in the tank. Mixing may be performed by introducing and applying vibration. Further, the vibration can be performed in at least one step other than the light irradiation.

Example 2 (i) Stereolithography Apparatus Using Powder-Mixed Photocurable Resin The apparatus of this Example is shown in FIG. 7 (powder is not shown in the figure). The present embodiment is an example of a stereolithography apparatus using the free liquid surface method. The stereolithography apparatus of FIG. 7 has a powder-mixed photocurable resin 70
It has a tank 71 for housing the. A device 7 for vibrating the powder-mixed photocurable resin is provided on the side surface of the tank 71.
Install 5. The device for giving this vibration is not particularly limited as long as it gives the vibration so that the powder component of the powder-mixed photo-curable resin 70 is uniformly dispersed in the powder-mixed photo-curable resin. An ultrasonic generator or the like is preferable. Further, although it is possible to install only one device 75 for applying vibration, it is preferable to install a plurality of devices asymmetrically on the side surface of the tank in order to add vibration efficiently. Furthermore, in FIG. 7, the device 75 for applying vibration is arranged on the side surface of the tank, but it may be arranged on the bottom surface of the tank or may be installed on the elevator 73. In addition, the vibration applying device 75 may be fixed or may be detachably installed. An elevator 73 for defining the thickness of the cured layer of the powder-mixed photo-curable resin is inserted in the tank. The elevator can have various shapes, but for example, one having an L-shaped cross section as shown in FIG. 6 can be used. The elevator can be moved up and down by an actuator (not shown) provided at the upper end.

A defoaming device is installed above the tank constructed as described above. The defoaming device is a cover 76 for sealing the tank 71, a packing 77 for maintaining airtightness between the cover 76 and the elevator 73, a glass 74 for transmitting light, and a vacuum device for reducing the pressure in the tank. 7
8 and a pipe 79 for connecting the vacuum device 78 and the tank 71. A hole is provided in the cover 76 so that the elevator can move up and down, and a packing 77 is attached to the hole so that the inside of the tank is airtight.
Further, the cover is provided with an opening so that light can be emitted from a light source 80 installed above the tank. The opening is preferably provided at a position where light irradiation is efficiently performed, and particularly preferably provided at the center of the upper part of the tank.
Further, a glass 74 that transmits light is airtightly attached to the opening so that the inside of the tank is kept at a reduced pressure. The glass that transmits the light is preferably quartz glass. The cover 7
A pipe 79 is attached to one end of 6, and a vacuum device 78
It is connected to. The inside of the tank is depressurized by this vacuum device.

Further, the apparatus of the present invention may be provided with a control device 84 for preventing vibration during light irradiation, as in the first embodiment. The control device 84 is connected to the elevator 73, the light source 80, the vibration imparting device 75, and the defoaming device 78. With this control device 84,
The elevator 73, the light source 80, the vibration giving device 75, and the defoaming device 78 can be automatically controlled, and the vibration can be automatically stopped at the time of light irradiation. Further, by using the control device 84, it is possible to perform control so that vibration is applied to at least one step other than the time of light irradiation.
A microcomputer or the like can be used as such a control device.

(Ii) Method for forming three-dimensional structure using powder-mixed curable resin A fluid photocurable resin was prepared in the same manner as in Example 1 above.

Then, the fluid photocurable resin thus obtained was kneaded with alumina powder by a stirring and defoaming machine. The obtained powder-mixed photocurable resin was introduced into the tank of the stereolithography machine. The introduction was carried out, for example, by pouring slowly from the end of the tank. Next, defoaming was performed to remove bubbles in the powder-mixed photocurable resin. Using the apparatus of the present invention, degassing was performed by reducing the pressure in the tank with a vacuum pump. Decompression degree in the tank is 0.09-0.1
It was mmHg.

Next, a three-dimensional structure was modeled by an optical modeling apparatus (see FIGS. 20 to 22. However, in these figures, the defoaming means was omitted. An elevator was inserted into the tank and the above vibration was performed. The powder-mixed photo-curable resin was vibrated by a means to give a uniform dispersion of the powder in the flowable photo-curable resin. Other than the irradiation step, it was added continuously.

Next, the elevator was fixed at a predetermined position, that is, one layer of the cured layer from the liquid surface of the powder-mixed photocurable resin. Specifically, FIG. 20 fixed 0.05 mm below the liquid surface. It is preferable to apply vibration during the movement of the elevator.

Next, light was irradiated in a desired shape to form a cured layer for one layer. In the present invention, the vibration is stopped during the irradiation of light so that the cured product is not deformed or the dimensional accuracy is not reduced. Even if the vibration was stopped at the stage of light irradiation, the powder did not settle immediately, so there was no particular problem. When the resin was cured to the desired shape, the light was stopped and vibration was applied again (Fig. 21). Next, the elevator was lowered by the amount of the newly formed hardened layer (FIG. 22). Next, a new hardened layer is formed so as to adhere to the upper part of the hardened layer in the same process of applying vibration and the light irradiation process. By repeating this operation and stacking a plurality of cured layers, a desired three-dimensional cured product can be formed.

After the desired shape was formed, the elevator was taken out of the tank and the inside of the tank was vibrated. The reduced pressure was released, the three-dimensional structure was taken out, washed and post-exposed to obtain the desired three-dimensional structure.

Naturally, various modifications can be made to this embodiment. For example, in the present embodiment, the step of kneading the fluid photocurable resin and the powder was provided, but in the present invention, it is not always necessary to provide this step, and the fluid photocurable resin and the powder are directly stored in the tank. Mixing may be performed by introducing and applying vibration. Further, the vibration can be performed in at least one step other than the light irradiation.

Example 3 In this example, an apparatus for defoaming was provided and an actuator for raising and lowering a light irradiation section and an elevator was provided in an airtight tank, and this apparatus was used. This is a method of forming a three-dimensional structure. Since the method of this embodiment does not use packing or the like, airtightness is good and depressurization does not take time.

(I) Stereolithography apparatus using powder-mixed photo-curable resin A schematic diagram of the apparatus of this example is shown in FIG. The present embodiment is an example of a stereolithography apparatus using the free liquid surface method. The stereolithography apparatus in FIG. 9 has a tank 71 that stores the powder-mixed photocurable resin 70. A device 75 for vibrating the powder-mixed photocurable resin is installed on the side surface of the tank 71. As the device for giving this vibration, the same device as that described in the second embodiment can be used, and the mode of the installation method is also the same as in the second embodiment.

Further, the apparatus of the present invention may be equipped with a control device 84 for preventing vibration during light irradiation as in the first embodiment. The control device 84 is connected to the elevator 73, the light source 80, the vibration imparting device 75, and the defoaming device 78. With this control device 84,
The elevator 73, the light source 80, the vibration giving device 75, and the defoaming device 78 can be automatically controlled, and the vibration can be automatically stopped at the time of light irradiation. Further, by using the control device 84, it is possible to perform control so that vibration is applied to at least one step other than the time of light irradiation.
A microcomputer or the like can be used as such a control device.

A defoaming device is installed in the tank constructed as described above. The defoaming device includes a cover 76 for sealing the tank 71, a vacuum device 78 for reducing the pressure in the tank, and a pipe 7 for connecting the vacuum device 78 and the tank 71.
It consists of 9. A cover 78 of the defoaming device is installed above the tank 71, and the cover 76 and one end of the pipe 79 are airtightly connected. The other end of the pipe is connected to a vacuum device. The inside of the tank is depressurized by this vacuum device. An elevator 73 for defining the thickness of the cured layer of the powder-mixed photocurable resin is provided in the tank. The elevator can have various shapes, but for example, an elevator having an L-shaped cross section as shown in FIG. 9 can be used. The elevator can be moved up and down by an actuator 82 installed on the tank inner surface side of the cover 76. Further, a light irradiation device 81 for irradiating light introduced from a light source 80 installed outside the tank through an optical fiber 83 is attached to the cover. Light irradiation device 81
Is preferably provided at a position where light irradiation is efficiently performed, and is particularly preferably provided at the center of the cover.

The light irradiation device 81 includes an actuator, and one end of the optical fiber 83 can be moved by the actuator according to the light irradiation pattern.

(Ii) Method of forming three-dimensional structure using powder-mixed curable resin: The method of forming a three-dimensional structure of this embodiment is performed by introducing light from the light source 80 installed outside the tank through the optical fiber 83. Example 2 except that light is emitted using a light irradiating device 81 for irradiating the elevator 73 and the elevator 73 is lowered by an actuator 82 installed on the inner surface side of the cover 76.
I went the same way.

Naturally, various modifications can be made to this embodiment. For example, in the present embodiment, the step of kneading the fluid photocurable resin and the powder was provided, but in the present invention, it is not always necessary to provide this step, and the fluid photocurable resin and the powder are directly stored in the tank. Mixing may be performed by introducing and applying vibration. Further, the vibration can be performed in at least one step other than the light irradiation.

Embodiment 4 This embodiment is an example of the second invention provided with means for applying vibration and cooling means.

(I) Stereolithography apparatus using powder-mixed photo-curable resin The apparatus of this example is shown in FIG. The present embodiment is an example of a stereolithography apparatus using the regulated liquid surface method. The stereolithography apparatus shown in FIG.
It has a tank 51 containing the powder-mixed photocurable resin 50, an elevator 53, a light source 56, and a means for vibrating the powder-mixed photocurable resin 50. These configurations are similar to those described in the first embodiment.

Further, the apparatus of the present invention may be equipped with a control device 62 for preventing vibration during light irradiation. The control device 62 is also the same as that described in the first embodiment.

The apparatus of the present invention is provided with a cooling means in addition to the above configuration. A Peltier element was used as the cooling means.
The cooling means may be installed so that the powder-mixed photo-curable resin can be efficiently cooled. It may be installed on the bottom surface of the tank as shown in FIG. 10 or installed on the side surface of the tank as shown in FIG. May be.

Further, also in the present embodiment, a device 62 for preventing vibration during light irradiation may be installed (the control device 62 is omitted in FIG. 11).

As in the case of the fourth embodiment, the means for vibrating the cooling device may be installed at the same position.

(Ii) Method for forming three-dimensional structure using powder-mixed curable resin UV curable resin 3042 made by ThreeBond and average particle size 3
After the alumina powder of μm was kneaded by a stirring and defoaming machine, the obtained powder-mixed photocurable resin was introduced into the tank of the stereolithography machine. The introduction was carried out, for example, by pouring slowly so that air bubbles did not enter from the end of the tank.

Next, a three-dimensional structure was formed in the same manner as in Example 1 except that the powder-mixed photo-curable resin 50 was cooled using the stereolithography apparatus having the above-mentioned configuration (i) (details are shown in FIG. 17 to 19. Note that in this embodiment, FIG.
A cooling device is installed on the bottom surface or the side surface of the tanks 7 to 19. ). The elevator was inserted into the tank, and the powder-mixed photocurable resin was vibrated by the means for giving the vibration (FIGS. 23 and 24). As a result, this vibration in which the powder is uniformly dispersed in the fluid photocurable resin is continuously applied during the process of forming the three-dimensional structure, except for the step of light irradiation.

Further, the cooling is appropriately adjusted so that the powder photocurable resin is not cured by heat. In this example, it was cooled to 25 ° C. Further, the cooling is performed by the tank 5 as shown in FIG.
The cooling device 62 may be installed on the bottom surface of the tank 1, or may be installed on the side surface of the tank 51 as shown in FIG. Cooling was continuously performed while the three-dimensional structure was formed by the stereolithography apparatus.

Next, the elevator was fixed at a predetermined position, that is, from the surface of the glass 55 installed on the bottom surface to one layer of the hardened layer. Specifically, from the glass surface installed on the bottom surface to 0.
It was fixed above 02 mm. It is preferable to apply vibration during the movement of the elevator.

Next, a desired shape was irradiated with light to form a cured layer for one layer (FIG. 18). In the present invention, the vibration is stopped during the irradiation of light so that the cured product is not deformed or the dimensional accuracy is not reduced. Even if the vibration is stopped at the stage of light irradiation, the powder does not settle immediately, so
There was no particular problem. When the resin was cured to the desired shape, the light was stopped and vibration was applied again. Next, the elevator was raised by the amount of the newly formed hardened layer. At this time, since the hardened layer has already been hardened and bonded to the elevator, it rises together with the elevator (FIG. 19).

Next, a new hardened layer is formed so as to adhere to the lower part of the hardened layer in the same process of applying vibration and the light irradiation process. By repeating this operation and stacking a plurality of cured layers, a desired three-dimensional cured product can be formed.

After the desired shape was formed, the elevator was taken out of the tank and the inside of the tank was vibrated. The three-dimensional structure was taken out, washed and post-exposed to obtain the desired three-dimensional structure.

Naturally, various modifications can be made to this embodiment. For example, in the present embodiment, the step of kneading the fluid photocurable resin and the powder was provided, but in the present invention, it is not always necessary to provide this step, and the fluid photocurable resin and the powder are directly stored in the tank. Mixing may be performed by introducing and applying vibration. Further, the vibration can be performed in at least one step other than the light irradiation. Further, the cooling may be continuous or intermittent.

Embodiment 5 This embodiment is an example of the second invention provided with a cooling means.

(I) Optical modeling apparatus using powder-mixed photo-curable resin The apparatus of this example is shown in FIG. The present embodiment is an example of a stereolithography apparatus using the free liquid surface method. The stereolithography apparatus in FIG. 12 is
It has a tank 71 containing the powder-mixed photo-curable resin 70, an elevator 73, a light source 80, and means for vibrating the powder-mixed photo-curable resin 70. These configurations are similar to those described in the second embodiment.

Further, the apparatus of the present invention may be equipped with a control device 84 for preventing vibration during light irradiation (the device is omitted in FIG. 12). The control device 84 is the same as that described in the first embodiment.

The apparatus of the present invention comprises a cooling means in addition to the above construction. A Peltier element was used as the cooling means.
A Peltier device was used as the cooling means. The cooling means may be installed so that the powder-mixed photo-curable resin can be efficiently cooled, and may be installed on the bottom surface of the tank as shown in FIG. 5, or on the side surface of the tank as shown in FIG. It may be installed in.

(Ii) Method of forming three-dimensional structure using powder-mixed curable resin UV curable resin 3042 manufactured by ThreeBond and average particle size 3
After the alumina powder of μm was kneaded by a stirring and defoaming machine, the obtained powder-mixed photocurable resin was introduced into the tank of the stereolithography machine. Then, the powder-mixed photocurable resin was cooled by a cooling means (25 ° C.). Cooling was continuously performed while the three-dimensional structure was formed by the stereolithography apparatus.

Next, a three-dimensional structure was modeled by an optical modeling apparatus (for details, refer to FIGS. 20 to 22. However, in this example,
Cooling means was provided on the bottom or side of the tank. ). The elevator was inserted into the tank, and the powder-mixed photocurable resin was vibrated by the means for giving the vibration. by this,
The powder was dispersed uniformly in a flowable photocurable resin (FIGS. 25 and 26). This vibration was continuously applied during the formation of the three-dimensional structure except for the step of light irradiation.

Next, the elevator was fixed at a predetermined position, that is, from the liquid surface of the powder-mixed photocurable resin to one layer of the cured layer. Specifically, it was fixed 0.05 mm below the surface of the liquid (FIG. 20). It is preferable to apply vibration during the movement of the elevator.

Next, light was irradiated in a desired shape to form a cured layer for one layer. In the present invention, the vibration is stopped during the irradiation of light so that the cured product is not deformed or the dimensional accuracy is not reduced. Even if the vibration was stopped at the stage of light irradiation, the powder did not settle immediately, so there was no particular problem. When the resin was cured to the desired shape, the light was stopped and vibration was applied again (Fig. 21). Next, the elevator was lowered by the amount of the newly formed hardened layer (FIG. 22). Next, a new hardened layer is formed so as to adhere to the upper part of the hardened layer in the same process of applying vibration and the light irradiation process. By repeating this operation and stacking a plurality of cured layers, a desired three-dimensional cured product can be formed.

After the desired shape was formed, the elevator was taken out of the tank and the inside of the tank was vibrated. The reduced pressure was released, the three-dimensional structure was taken out, washed and post-exposed to obtain the desired three-dimensional structure.

Naturally, various modifications can be made to this embodiment. For example, in the present embodiment, the step of kneading the fluid photocurable resin and the powder was provided, but in the present invention, it is not always necessary to provide this step, and the fluid photocurable resin and the powder are directly stored in the tank. Mixing may be performed by introducing and applying vibration. Further, the vibration can be performed in at least one step other than the light irradiation. The cooling can also be applied intermittently rather than continuously.

In the present invention, a three-dimensional structure forming apparatus equipped with the vibrating means, the defoaming means and the cooling means may be used. Examples of such a three-dimensional structure forming apparatus and a method of processing a three-dimensional structure using the forming apparatus will be described below.

Example 6 (i) Stereolithography Apparatus Using Powder-Mixed Photocurable Resin The stereolithography apparatus of this Example is a tank containing an powder-mixed photocurable resin, an elevator, a light source, and a powder-mixed photocurable resin. It has means for giving vibration to the resin. These configurations are
This is similar to that described in the first embodiment.

Further, the apparatus of the present invention may be equipped with a control device for preventing vibration during light irradiation. The control device is also the same as that described in the first embodiment.

The apparatus of the present invention is provided with a cooling means in addition to the above structure. A Peltier element was used as the cooling means.
The cooling means may be installed so that the powder-mixed photocurable resin can be cooled efficiently, and may be installed on the bottom surface of the tank or on the side surface of the tank. Further, as in the fourth and fifth embodiments, the cooling device and the means for applying vibration may be installed at the same position.

The three-dimensional stereolithography apparatus of this embodiment further comprises a defoaming device. This defoaming device has the same structure as that shown in Examples 1 to 3.

The three-dimensional stereolithography apparatus of this embodiment is a regulated liquid level method, a free liquid level method, and a free liquid level method, in which an elevator, a light irradiation unit, and an elevator are moved up and down in an airtight tank. Can be applied to a method including an actuator for

(Ii) Method for forming three-dimensional structure using powder-mixed curable resin UV curable resin 3042 made by ThreeBond and average particle size 3
After the alumina powder of μm was kneaded by a stirring and defoaming machine, the obtained powder-mixed photocurable resin was introduced into the tank of the stereolithography machine. Next, air bubbles in the powder-mixed photocurable resin were removed by a defoaming device. Then, the powder-mixed photocurable resin was cooled by a cooling means (25 ° C.). The degree of vacuum in the tank was 0.09 to 0.1 mmHg. Defoaming and cooling were continuously performed while the three-dimensional structure was being formed by the stereolithography apparatus. It is preferable to apply vibration at the same time during this defoaming and cooling.

Then, the three-dimensional structure can be formed by, for example, the same method as the stereolithographic method shown in the first embodiment.

An elevator was inserted into the tank, and the powder-mixed photocurable resin was vibrated by the means for giving the above vibration.
This allows the powder to be uniformly dispersed in the fluid photocurable resin. This vibration was continuously applied during the formation of the three-dimensional structure except for the step of light irradiation.

Next, the elevator was fixed at a predetermined position, that is, one layer of the cured layer from the liquid surface of the powder-mixed photocurable resin. Specifically, it was fixed 0.02 mm above the liquid surface. It is preferable to apply vibration during the movement of the elevator.

Next, the desired shape was irradiated with light to form a cured layer for one layer. In the present invention, the vibration is stopped during the irradiation of light so that the cured product is not deformed or the dimensional accuracy is not reduced. Even if the vibration was stopped at the stage of light irradiation, the powder did not settle immediately, so there was no particular problem. When the resin was cured to the desired shape, the light was stopped and vibration was applied again. Next, the elevator was moved up and down by the amount of the newly formed hardened layer. At this time, since the hardened layer has already been hardened and bonded to the elevator, it rises together with the elevator (FIG. 19).

Next, a new hardened layer is formed so as to adhere to the lower part of the hardened layer in the same process of applying vibration and the light irradiation process. By repeating this operation and stacking a plurality of cured layers, a desired three-dimensional cured product can be formed.

After the desired shape was formed, the elevator was taken out of the tank and the inside of the tank was vibrated. The reduced pressure was released, the three-dimensional structure was taken out, washed and post-exposed to obtain the desired three-dimensional structure.

Naturally, various modifications can be made to this embodiment. For example, in the present embodiment, the step of kneading the fluid photocurable resin and the powder was provided, but in the present invention, it is not always necessary to provide this step, and the fluid photocurable resin and the powder are directly stored in the tank. Mixing may be performed by introducing and applying vibration. Further, the vibration can be performed in at least one step other than the light irradiation.

The present invention can include inventions other than those described in the claims. The inventions of the apparatus related to (1) and (2) and the invention of the three-dimensional stereolithography method related to (3) are separately described below. In addition, in order to clarify the subordination relationship with (1) to (3) above, (1) to (3) above
The invention of is also described. In the following description, the description of the invention of the device will be made from (1), (2), and (4) to (1
3), and the description of the method invention is (3) and (14) to (17).

First, the invention relating to the apparatus will be described. The invention of the method is also described after the device.

(1) A powder-mixed photocurable resin obtained by mixing powder with a fluid photocurable resin is irradiated with light while scanning light to form a photocurable layer. In a stereolithography apparatus for stacking layers to fabricate a three-dimensional structure, a housing means for housing the powder-mixed photocurable resin, and a support means arranged in the housing means and on which the photocurable layer is formed. A light irradiating means for irradiating the powder-mixed photo-curable resin of the accommodating means with light so as to cure the powder-mixed photo-curable resin near the supporting means, and a vibration for vibrating the powder-mixed photo-curable resin An optical modeling apparatus comprising: a means and a defoaming means for removing bubbles existing in the powder-mixed photocurable resin.

(Example) Examples 1 to 3 are applicable.

(Operation / Effect) The air mixed in the powder-mixed photo-curable resin can be efficiently removed by defoaming the powder-mixed photo-curable resin using a means for vibrating the powder-mixed photo-curable resin. Further, by vibrating to prevent precipitation of the powder contained in the powder-mixed photocurable resin, the powder is uniformly mixed in the resin, and a three-dimensional structure made of the powder-mixed photocurable resin in which the powder is uniformly dispersed is formed. Can be shaped.

(2) A powder-mixed photocurable resin obtained by mixing powder with a fluid photocurable resin is irradiated with light while scanning light to form a photocurable layer, and a plurality of photocurable layers are formed. In a stereolithography device for stacking layers to fabricate a three-dimensional structure, accommodating means for accommodating the powder-mixed photocurable resin,
The powder-mixed photo-curable resin in the storage means is irradiated with light so as to cure the powder-mixed photo-curable resin disposed in the storage means and formed by the photo-curable layer and the support means in the vicinity of the support means. An optical modeling apparatus comprising: a light irradiating unit for controlling the powder mixed photocurable resin; a vibrating unit for vibrating the powder mixed photocurable resin; and a cooling unit for cooling the powder mixed photocurable resin.

(Embodiment) 4 and 5 of the embodiment correspond.

(Operation / Effect) Since the powder-mixed photo-curable resin is provided with a means for vibrating and a means for cooling, the air mixed in the powder-mixed photo-curable resin is efficiently degassed, Further, the vibration can prevent the powder contained in the powder-mixed photocurable resin from settling. Therefore, the powder in the powder-mixed photocurable resin is uniformly mixed, and it is possible to provide a stereolithography apparatus capable of molding a three-dimensional structure made of the powder-mixed photocurable resin having excellent strength and heat resistance. .

Depending on the type of photocurable fluid resin contained in the powder-mixed photocurable resin, there is a characteristic that it is cured by heat in addition to light. Therefore, by cooling the heat generated by the means for giving vibration to the powder-mixed photo-curable resin by means of the cooling means, it is possible to prevent the powder-mixed photo-curable resin from being cured by vibration heat. As a result, an accurate three-dimensional structure can be formed without unnecessary adhesion of a cured product. Further, by vibrating means, it is possible to prevent the powder contained in the powder-mixed photocurable resin from settling, and form a three-dimensional structure made of the powder-mixed photocurable resin in which the powders are uniformly mixed. be able to.

(4) The stereolithography apparatus according to (1) above, further comprising cooling means for cooling the powder-mixed photocurable resin.

(Example) The sixth example corresponds to the example.

(Operation / Effect) Since the photocurable fluid resin and the powder mixed in the powder-mixed photocurable resin have different specific gravities, the powder in the powder-mixed photocurable resin is precipitated. Since it is impossible to mix the powders uniformly, it is difficult to form a three-dimensional structure made of the cured powder-mixed photocurable resin in which the powders are uniformly mixed. The photocurable fluid resin and the powder can be uniformly mixed by applying vibration to the resin during modeling by means of an optical modeling apparatus using a means for giving vibration to the resin, a means for defoaming and a means for cooling. Further, by providing a means for defoaming, it is possible to prevent air from being mixed into the powder-mixed photocurable resin. Further, by providing a means for further cooling, it is possible to cool the heat applied to the powder-mixed photocurable resin by vibration,
It is possible to prevent the powder-mixed photocurable resin from being cured by vibration heat. By the above action, an optical modeling apparatus capable of accurately modeling a three-dimensional structure in which powder of the powder-mixed photocurable resin is uniformly mixed, without unnecessary adhesion of a cured product, is provided. sell.

(5) The stereolithography apparatus according to (2) above, further comprising defoaming means for removing bubbles present in the powder-mixed photocurable resin.

(Example) Example 6 corresponds to Example 6.

(Function / Effect) Since the photocurable fluid resin and the powder mixed in the powder-mixed photocurable resin have different specific gravities, the powder in the powder-mixed photocurable resin is precipitated. Since it is impossible to mix the powders uniformly, it is difficult to form a three-dimensional structure made of the cured powder-mixed photocurable resin in which the powders are uniformly mixed. The photocurable fluid resin and the powder can be uniformly mixed by applying vibration to the resin during modeling by means of an optical modeling apparatus using a means for giving vibration to the resin, a means for defoaming and a means for cooling. Further, by providing a means for defoaming, it is possible to prevent air from being mixed into the powder-mixed photocurable resin. Further, by providing a means for further cooling, it is possible to cool the heat applied to the powder-mixed photocurable resin by vibration,
It is possible to prevent the powder-mixed photocurable resin from being cured by vibration heat. By the above action, an optical modeling apparatus capable of accurately modeling a three-dimensional structure in which powder of the powder-mixed photocurable resin is uniformly mixed, without unnecessary adhesion of a cured product, is provided. sell.

(6) The optical modeling apparatus as described in (2) or (4) above, wherein the cooling means is a Peltier element.

(Examples) Examples 4 to 6 are applicable.

(Operation / Effect) Since the means for cooling the heat is the Peltier element, the mounting area of the cooling means is reduced, so that the device can be downsized. Further, the curing condition of the powder-mixed photocurable resin is characterized by being easily influenced by temperature. By measuring the temperature of the powder-mixed photocurable resin with a sensor and using a Beltier element capable of controlling the temperature with electric energy, stereolithography can be performed while keeping the temperature of the powder-mixed photocurable resin constant. it can. As a result, without being affected by changes in the outside air temperature that change depending on the season,
It is possible to provide a device capable of forming a stable three-dimensional structure under constant curing conditions.

(7) In the optical modeling apparatus according to any one of (1) and (2) to (6), the means for giving the vibration uses ultrasonic waves or sound waves. Modeling equipment.

(Example) Examples 1 to 6 are applicable.

(Operation / Effect) In the case of a structure in which a screw-type stirrer is inserted into a tank for stirring, the screw-type stirrer can be positioned at the center because the elevator is at the center of the tank. Since it cannot be done, only partial stirring is possible. In particular, the powder-mixed photo-curable resin has a high viscosity when the powder content is high, so that it is impossible to stir the portion other than the periphery of the screw portion. In addition, since a vortex is easily generated on the upper surface of the powder-mixed photo-curable resin by the screw-type stirrer, it is necessary to wait for a while until the upper surface of the powder-mixed photo-curable resin becomes flat before light irradiation. The thickness of the cured layer becomes uneven. In the device of the present invention, since the means for applying vibration is ultrasonic waves or sound waves, it is possible to apply vibration to the entire powder-mixed photo-curable resin, and to uniformly disperse the powder contained in the powder-mixed photo-curable resin. Can be mixed. Further, since no vortex is generated, the time until the upper surface becomes flat is shortened, which has the effect of shortening the modeling time.

(8) In the optical modeling apparatus according to any one of (1) and (2) to (6), the means for giving the vibration is attached to the supporting means. Modeling equipment.

(Example) Examples 1 to 6 correspond.

(Operation / Effect) Since the supporting means is equipped with a means for giving vibration, it is possible to directly apply vibration to the cured powder-mixed photocurable resin on the supporting means. Therefore, there is an effect that the powder-mixed photo-curable resin can be efficiently stirred at the place where the light irradiation that requires the most stirring is performed.

(9) In the optical modeling apparatus described in any one of (1) and (2) to (6) above, the supporting means is
An optical modeling apparatus, which is directly attached to the housing means.

(Examples) Examples 1 to 6 are applicable.

(Operation / Effect) Since the means for giving the vibration is provided on the bottom surface or the side surface of the supporting means for putting the powder-mixed photo-curable resin, the vibration of the whole supporting means causes the powder-mixed light to be mixed. There is an effect that the powder contained in the curable resin can be uniformly mixed.

(10) In the stereolithography apparatus of the above (8) and (9), the means for giving the vibration is detachably attached to the supporting means or the accommodating means. .

(Example) Examples 1 to 6 correspond.

(Operation and effect) By detachably mounting the means for giving the vibration, only the supporting means or the accommodating means can be detached, so that the viscosity of the viscous material adhered to the supporting means or the accommodating means is high after the completion of modeling. The powder-mixed photo-curable resin can be easily washed. In particular, since only the supporting means or the housing means can be washed without wetting the actuator during washing, there is an effect that there is no risk of electric leakage.

(11) In the optical molding apparatus described in (1) or (2) above, the accommodating means is made of an enclosure that seals the powder-mixed photocurable resin and has a light transmitting portion. Characterized stereolithography equipment.

(Example) The second example corresponds to Example 2.

(Operation / Effect) By providing the sealed accommodating means and the accommodating means with a portion for transmitting light, the volume in the accommodating means can be reduced, and the low volume portion can be depressurized. Since the energy required for decompression is small, the decompression time is short. Therefore, there is an effect that the time required for modeling can be shortened.

(12) In the optical molding apparatus described in (11) above, the defoaming means removes the pipe connected to the accommodating means and the air in the accommodating means connected to the pipe. A stereolithography device characterized by comprising a vacuum pump.

(Example) Examples 1 to 6 correspond.

(Operation / Effect) The defoaming means is provided with a cover for sealing the accommodating means, and a pipe and a vacuum device are provided as means for depressurizing the air in the accommodating means. Since light is not used, there is an effect that defoaming can be stably performed without curing the powder-mixed photocurable resin.

(13) From the above (1) and (2) to (5)
In the stereolithography apparatus according to any one of the above, further comprising a control means for stopping the vibration applied by the means for giving the vibration at the time of light irradiation, the control means comprising the supporting means, the light irradiation means, and the vibration. And a defoaming means and / or a cooling means.

(Examples) Examples 1 to 6 are applicable.

(Operation and effect) A control means for controlling the vibration means is provided, and the control means is connected to the support means, the light irradiation means, the vibration giving means, and the defoaming means and / or the cooling means. By doing so, the vibration can be stopped only when the light is irradiated while judging the status of each means, and this stop can be automatically performed. Furthermore,
It has an effect that each means can be automatically controlled.

Next, the three-dimensional stereolithography method of the present invention will be described. In order to clarify the subordination relationship, the invention (3) of the three-dimensional stereolithography method is also described.

(3) A powder-mixed photocurable resin obtained by mixing powder in a fluid photocurable resin is irradiated with light while scanning light to form a photocurable layer. In the stereolithography method for stacking layers to fabricate a three-dimensional structure, a kneading step of mixing a monastic photocurable resin and a predetermined powder material to obtain a powder-mixed photocurable resin, and a fluid photocurable resin A housing step of housing the housing means together with the supporting means, and a light irradiation step of irradiating the powder-mixed photocurable resin housed in the housing means with light while scanning the light to form a photocurable layer on the supporting means. And a moving step of intermittently moving the supporting means at a predetermined distance so as to form a three-dimensional structure by stacking a plurality of the photocurable layers.
And a vibrating step of vibrating the powder-mixed photo-curable resin.

(Examples) Examples 1 to 6 are applicable.

(Operation / Effect) By providing the means for vibrating the powder-mixed photocurable resin, it is possible to prevent the powder contained in the powder-mixed photocurable resin from settling due to the vibration. Therefore, the powder in the powder-mixed photocurable resin is uniformly mixed, and it is possible to provide a stereolithography apparatus capable of molding a three-dimensional structure made of the powder-mixed photocurable resin having excellent strength and heat resistance. .

By vibrating means, it is possible to prevent the powder contained in the powder-mixed photocurable resin from settling, and to obtain a three-dimensional structure made of the powder-mixed photocurable resin in which the powders are uniformly mixed. Can be shaped.

(14) In the above (3), the stereolithography method is characterized in that the vibrating step is performed in at least one step other than the light irradiation step.

(Example) Examples 1 to 6 correspond.

(Operation / Effect) By vibrating the powder-mixed photocurable resin, the powder contained in the powder-mixed photocurable resin can be prevented from settling. Further, it is possible to prevent the cured product from being deformed and the dimensional accuracy from being lowered by stopping the vibration at the time of light irradiation. Therefore, an accurate three-dimensional structure can be formed.

(15) A stereolithography method according to the above (3), which further comprises a defoaming step of removing bubbles in the powder-mixed photocurable resin.

(Examples) Examples 1 to 3 and 6 correspond.

(Operation / Effect) An optical modeling apparatus equipped with a means for vibrating the powder-mixed photocurable resin and a means for defoaming is used. The air mixed in the powder-mixed photocurable resin can be efficiently defoamed by the defoaming means, and the vibration can prevent the powder contained in the powder-mixed photocurable resin from settling. Since there is a means for removing bubbles, there is an effect that it is possible to provide a stereolithography method that does not contain bubbles.

(16) An optical molding method according to the above (3), which further comprises a cooling step of cooling the powder-mixed photocurable resin.

(Example) Examples 4 to 6 correspond.

(Operation / Effect) An optical modeling apparatus provided with a means for vibrating the powder-mixed photo-curable resin and a means for cooling is used. The vibration can prevent the powder contained in the powder-mixed photocurable resin from settling. Further, since it also has a cooling means, it is possible to prevent the powder-mixed photo-curable resin from being hardened by vibration heat, and therefore, it is possible to perform accurate molding without causing unnecessary hardened material to be attached due to vibration heat. . Therefore, there is an effect that a highly accurate stereolithography processing method can be provided.

(17) In the above-mentioned (3), the vibrating step is performed during the moving step.

(Examples) Examples 1 to 6 correspond.

(Operation and effect) Since the powder-mixed photocurable resin exhibits a non-Newtonian fluid, particularly a thixotropic behavior, the viscosity is lowered by applying vibration. By vibrating the powder-mixed photo-curable resin, the viscous resistance of the support means driven in the powder-mixed photo-curable resin is reduced, so that the support means can be driven at a low output and expensive high torque. This has the effect of eliminating the need for the drive device. Further, since the viscous resistance of the supporting means is reduced, the positioning accuracy of the supporting means is improved, and the mixing ratio of the powder contained in the powder-mixed photocurable resin can be improved. Therefore, when producing a sintered structure, there is an effect that the sintered density of the structure can be improved.

[0193]

Since the stereolithography apparatus of the present invention is provided with means for vibrating the powder-mixed photo-curable resin, the powder is uniformly dispersed.

Further, since the stereolithography apparatus of the present invention is provided with the defoaming means, bubbles do not enter the powder-mixed photocurable resin.

Further, since the stereolithography apparatus of the present invention is provided with the cooling means, the powder-mixed photocurable resin is not cured by the heat generated by the means for giving vibration.

Furthermore, the stereolithography apparatus of the present invention has means for applying vibration, and when vibration is applied to the powder-mixed photocurable resin by this means, the resin exhibits a non-Newtonian fluid, particularly thixotropic behavior. As shown, the viscosity of the resin decreases. For example, a powder-mixed photocurable resin obtained by mixing an alumina powder (average particle size 3 μm) and a fluid photocurable resin (viscosity 20 mPa · s) has a viscosity of 1000 mPa · s, but is subjected to vibration. This viscosity is 6
It decreased to 50 mPa · s. As a result, the elevator that moves up and down during the molding of the three-dimensional structure becomes easy to move in the powder-mixed photocurable resin, and the elevator can be driven with low output. Therefore, an expensive high-torque driving device is not required, which leads to cost reduction. Further, when the viscosity of the powder-mixed photo-curable resin is reduced, the resistance to the elevator is reduced and the positioning accuracy of the elevator is improved. This makes it possible to form a highly accurate three-dimensional structure.

According to the optical molding method of the present invention, by applying vibration, the powder is uniformly dispersed in the powder-mixed photocurable resin, so that a uniform three-dimensional structure can be molded. Further, in the modeling method of the present invention, since the means for defoaming is used, bubbles do not enter into the powder-mixed photocurable resin, and therefore it is possible to model a three-dimensional structure in which bubbles are not mixed. . Furthermore, in the modeling method of the present invention,
Since the powder-mixed photo-curable resin is cooled by the cooling means, it is possible to prevent the heat generated by the means for applying vibration and prevent unnecessary cured products from being attached by vibration heat. Therefore, it is possible to form an accurate three-dimensional structure.

[Brief description of drawings]

FIG. 1 is a flow chart of a process for manufacturing a conventional three-dimensional optical structure.

FIG. 2 is a flow diagram of a conventional process for manufacturing a three-dimensional optical structure using a powder-mixed photocurable resin.

FIG. 3 is a schematic view showing an apparatus used for curing a conventional powder-mixed photocurable resin, showing a state where powder is settled.

FIG. 4 is a schematic view of an apparatus used for curing a conventional powder-mixed photocurable resin, which apparatus uses a screw-type stirrer.

FIG. 5 is a schematic view showing one mode of a three-dimensional structure forming apparatus of the present invention, the apparatus including defoaming means and vibration applying means.

FIG. 6 is a schematic view showing one mode of a three-dimensional structure manufacturing apparatus of the present invention, the apparatus including defoaming means and vibration applying means.

FIG. 7 is a schematic view showing an aspect of a three-dimensional structure manufacturing apparatus of the present invention, the apparatus including defoaming means and vibration applying means.

FIG. 8 is a schematic diagram showing one mode of a three-dimensional structure forming apparatus of the present invention, which is equipped with a defoaming unit and a unit for applying vibration.

FIG. 9 is a schematic diagram showing an aspect of the three-dimensional structure manufacturing apparatus of the present invention, which is provided with a means for applying vibration and a cooling means.

FIG. 10 is a three-dimensional structure manufacturing apparatus of the present invention,
It is a schematic diagram showing one mode of a device provided with means for applying vibration and cooling means.

FIG. 11 is a three-dimensional structure manufacturing apparatus of the present invention,
It is a schematic diagram showing one mode of a device provided with means for applying vibration and cooling means.

FIG. 12 is a three-dimensional structure manufacturing apparatus of the present invention,
It is a schematic diagram showing one mode of a device provided with means for applying vibration and cooling means.

FIG. 13 is a flow diagram showing a process of manufacturing a three-dimensional structure using the three-dimensional structure manufacturing apparatus of the present invention.

FIG. 14 is a three-dimensional structure manufacturing apparatus of the present invention,
It is a schematic diagram showing the state where vibration is not applied by the means for giving vibration.

FIG. 15 is a schematic view showing a three-dimensional structure manufacturing apparatus of the present invention in a state where vibration is applied by means for giving vibration.

FIG. 16 is a flowchart showing a process of manufacturing a three-dimensional structure using the three-dimensional structure manufacturing apparatus of the present invention.

FIG. 17 is a schematic diagram showing a state in which vibration is applied in a process of manufacturing a three-dimensional structure by a regulated liquid level method using the three-dimensional structure manufacturing apparatus of the present invention.

FIG. 18 is a schematic view showing a state where light irradiation is performed in a process of manufacturing a three-dimensional structure by a regulated liquid surface method using the three-dimensional structure manufacturing apparatus of the present invention.

FIG. 19 is a schematic view showing a state in which light irradiation is stopped and a cured layer is obtained in a step of producing a three-dimensional structure by a regulated liquid level method using the three-dimensional structure forming apparatus of the present invention. Is.

FIG. 20 is a schematic diagram showing a state in which vibration is applied in the process of manufacturing a three-dimensional structure by the free liquid surface method using the three-dimensional structure manufacturing apparatus of the present invention.

FIG. 21 is a schematic view showing a state in which light irradiation is performed in the process of manufacturing a three-dimensional structure by the free liquid surface method using the three-dimensional structure manufacturing apparatus of the present invention.

FIG. 22 is a schematic view showing a state in which light irradiation is stopped and a hardened layer is obtained in the process of manufacturing a three-dimensional structure by the free liquid surface method using the three-dimensional structure manufacturing apparatus of the present invention. Is.

FIG. 23 is a schematic view showing a three-dimensional structure manufacturing apparatus equipped with the vibration applying means and the cooling means of the present invention, in which the cooling apparatus is arranged on the bottom surface of the tank.

FIG. 24 is a schematic view showing a three-dimensional structure manufacturing apparatus provided with the vibration applying means and the cooling means of the present invention, in which the cooling apparatus is arranged on the side surface of the tank.

FIG. 25 is a schematic view showing a three-dimensional structure manufacturing apparatus equipped with the vibration applying means and the cooling means of the present invention, in which the cooling apparatus is arranged on the bottom surface of the tank.

FIG. 26 is a schematic view showing a three-dimensional structure manufacturing apparatus provided with a vibration applying unit and a cooling unit of the present invention, in which the cooling unit is arranged on a side surface of a tank.

[Explanation of symbols]

21, 34, 53, 73, 144 ... Elevator; 22,
35, 51, 71, 140 ... Tank; 23, 54, 14
7 ... Tape; 24, 55, 74, 146 ... Light transmissive glass; 25, 65, 86, 142 ... Powder; 26, 33 ... Fluid photocurable resin; 32 ... Laser light; 27 ... Cured layer Height of thickness; 31 ... Screw agitator, 36 ... Screw; 37, 52, 72 ... Photocured product; 50, 70, 1
41 ... Powder-mixed photocurable resin; 57, 75, 143 ... Means for giving vibration; 56, 80 ... Light source; 58, 76 ... Cover; 59, 77 ... Packing; 61, 79 ... Pipe; 6
0, 78 ... Vacuum device; 81 ... Light irradiation unit; 82 ... Elevator lifting actuator; 83 ... Optical fiber; 63,
85, 145 ... Cooling means; 62, 84 ... Control device for preventing vibration during light irradiation

Claims (3)

[Claims] 1. A light-curing layer is formed by irradiating a powder-mixed light-curing resin obtained by mixing powders with a fluid photo-curing resin while scanning light to form a light-curing layer. In a stereolithography apparatus for stacking and molding a three-dimensional structure, a housing means for housing the powder-mixed photocurable resin, a support means disposed in the housing means, the photocurable layer is formed, Light irradiating means for irradiating the powder-mixed photocurable resin of the accommodating means with light so as to cure the powder-mixed photocurable resin near the supporting means, and vibrating means for vibrating the powder-mixed photocurable resin And a defoaming unit for removing bubbles existing in the powder-mixed photocurable resin. 2. A powder-cured photocurable resin obtained by mixing powder with a fluid photocurable resin is irradiated with light while scanning light to form a photocurable layer, and a plurality of the photocurable layers are formed. In a stereolithography apparatus for stacking and molding a three-dimensional structure, a housing means for housing the powder-mixed photocurable resin, a supporting means arranged in the housing means and formed by the photocurable layer, and the supporting means. A light irradiating means for irradiating the powder-mixed photo-curable resin in the accommodating means with light so as to cure the powder-mixed photo-curable resin in the vicinity thereof; and a vibrating means for vibrating the powder-mixed photo-curable resin, A stereolithography apparatus comprising: a cooling unit that cools the powder-mixed photo-curable resin. 3. A photocurable layer is formed by irradiating a powder-mixed photocurable resin obtained by mixing powders with a fluid photocurable resin while scanning light to form a photocurable layer. In a stereolithography method of stacking and molding a three-dimensional structure, a kneading step of mixing a monastic photocurable resin and a predetermined powder material to obtain a powder-mixed photocurable resin, and supporting a fluid photocurable resin An accommodating step of accommodating the accommodating means in the accommodating means, and a light irradiating step of irradiating the powder-mixed photocurable resin contained in the accommodating means with light while scanning the light and forming a photocurable layer on the supporting means. A moving step of intermittently moving the supporting means at a predetermined distance so as to form a three-dimensional structure by stacking a plurality of the photocurable layers, and a vibrating step of vibrating the powder-mixed photocurable resin. Is equipped with Optical modeling how.