JP2001096630A - Method and device for manufacturing three-dimensional body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an efficient manufacturing method for a three-dimensional body with no uneven curing from a base material made of a cationic ultraviolet curing composition. SOLUTION: A cationic ultraviolet curing composition is made to fall from the nozzle of a dispenser so as to pour the falling composition in a mold under the condition that ultraviolet rays emitted from an ultraviolet light source lamp are applied to the falling composition from its whole periphery in order to take out a set matter from the mold after the elapse of a predetermined period of time so as to obtain a three-dimensional body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for producing a three-dimensional object, and more particularly to a method and an apparatus for producing a three-dimensional object based on a cationic ultraviolet curable composition.

[0002]

2. Description of the Related Art In general, a cationic UV curable composition is excellent in heat resistance, has a small curing shrinkage as compared with a radical polymerization type UV curable composition, and is therefore characterized by excellent dimensional stability after curing. In addition, by appropriately designing the composition of the composition, the curing time, the curing sensitivity to the amount of ultraviolet irradiation, and the hardness and elastic modulus of the cured product can be controlled over a wide range. Mold products include frames for various electrical devices, outer frames for mobile phones, etc.
Various applications such as various electrical insulation parts, precision engineering parts and folk crafts are conceivable.

[0003]

However, the production of a casting, that is, a three-dimensional object, using such a composition as a base material is limited in that the casting mold must be made of a light-transmitting material. Is accompanied. Also, even if the mold is made of a light-transmitting material, if the casting has a thick part, the ultraviolet ray must be irradiated to the deep part of the thick part,
Since the photoinitiator contained in the cationic ultraviolet curable composition generally shows strong absorption of ultraviolet light, it is very difficult to uniformly irradiate ultraviolet light even deep into the casting. For these reasons, it has been virtually impossible to produce a three-dimensional object using a cationic ultraviolet curable composition as a substrate.

An object of the present invention is to provide a method for producing a three-dimensional object with good dimensional accuracy, no strength unevenness and no curing unevenness, and a good yield by using a cationic ultraviolet curable composition as a base material.

[0005]

Means for Solving the Problems The present inventors have studied various methods for producing a three-dimensional object with high productivity using a cationic UV-curable composition as a base material. Rather than irradiating the mold with ultraviolet light, the composition can be evenly irradiated with ultraviolet light by irradiating with ultraviolet light before injection into the mold.
The present inventors have found that products having excellent shape stability can be obtained at a high yield, and have completed the present invention.

A method for producing a three-dimensional object according to the present invention comprises the steps of: using a cationic UV-curable composition as a material for casting, irradiating the cationic UV-curable composition with ultraviolet light; Injecting the irradiated cationic ultraviolet curable composition into a casting mold. Conventional radical-type UV-curable compositions are fast-acting as described below, and could not be cured by irradiating the composition with UV rays before injecting into a mold. This operation became possible for the first time by using.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, as a method for irradiating a cationic ultraviolet ray-curable composition with ultraviolet rays, a publicly known method can be adopted. For example, a method of passing a cationic ultraviolet ray-curable composition through a light-transmitting tube is used. It is also conceivable to irradiate ultraviolet rays in the process of causing the cation-type ultraviolet curable composition to cure and adhere to the inner wall of the tube,
Eventually the pipe must be replaced. On the other hand, such a situation can be avoided by ultraviolet irradiation using a space.

[0008] Therefore, it is desirable to irradiate the cationic ultraviolet-curable composition with ultraviolet rays in a path from a nozzle for discharging the composition to an injection port. It is more desirable to do this before reaching the mold inlet. By employing this ultraviolet irradiation method, it is possible to uniformly irradiate the ultraviolet rays to the deep part of the three-dimensional object to be molded, and it is possible to eliminate internal curing failure.

The cationic UV-curable composition used in the present invention is a cationic UV-curable resin (epoxy resin).
And a cationic polymerization type photoinitiator. Unlike ordinary UV curable compositions in which the degree of curing is substantially immediately saturated almost simultaneously with the irradiation of ultraviolet light (called immediate action in the sense that the effect of ultraviolet irradiation appears immediately), the degree of curing is not saturated immediately after irradiation of ultraviolet light, After a lapse of a predetermined time, the degree of curing is substantially saturated (referred to as "slow effect"). In the present invention,
The composition is prepared such that the degree of curing is saturated after an appropriate time has elapsed from the irradiation of the ultraviolet ray, depending on the size and shape of the three-dimensional object to be obtained. That is, since there is a certain period of time from the time of irradiation of ultraviolet rays to the time when the degree of curing is saturated (there is a pot life), the injection work into the mold can be performed during that time. The cationic UV-curable composition containing the cationic UV-curable resin and the cationic polymerization-type photoinitiator as essential components is preferably a substantially solvent-free liquid because it can be easily dropped into a mold.

[0010] The viscosity of the composition is usually 10 at 25 ° C.
To 300 mPa · s, preferably 20 to 150 mPa · s
s.

The time from the end of ultraviolet irradiation to the time when the curing degree is saturated and the absolute value of the saturated curing degree are determined by the type of the cationic ultraviolet curable resin and the type of the cationic polymerization type photoinitiator used in combination with the resin. Although it is adjusted by the weight ratio, it is adjusted so as to be, for example, 3 to 60 minutes, preferably 5 to 40 minutes, more preferably 5 to 30 minutes, and particularly preferably 5 to 20 minutes.

In order to obtain such a cationic UV-curable composition, for example, two or more cationic UV-curable resins having different curing characteristics such as a single curing speed and the like are used in combination, and the composition ratio is adjusted. There is a method.

The cationic UV-curable resin used for preparing the liquid cationic UV-curable composition includes:
For example, there is an epoxy resin, and a glycidyl ether type epoxy resin is mainly used. This resin usually contains chlorine-bonded impurities due to epichlorohydrin as a raw material, but the amount of chlorine in the epoxy resin is set to 1% by weight or less in order to prevent a corrosive action on the surroundings. It is desirable.

To prepare a liquid cationic ultraviolet curable composition without solvent, for example, a solid epoxy resin is prepared by adding
It is preferable to dissolve it in a liquid epoxy resin that can be dissolved.

The glycidyl ether type epoxy resin is preferably a combination of a bisphenol type epoxy resin and an aliphatic diol polyglycidyl ether, and more preferably a combination of a bisphenol type epoxy resin and an aliphatic diol diglycidyl ether.

Oxetane compounds, alicyclic epoxidation
Compounds can also be used in combination. In addition, cationic UV
The cationic polymerization type photoinitiator constituting the curable composition is
The cation moiety is aromatic sulfonium or aromatic iodine
From ammonium, aromatic diazonium and aromatic ammonium
Selected from the group consisting of
X _Four]^-(Where X is at least two or more fluorines or
(Phenyl group substituted by trifluoromethyl group)
The onium salt is preferably used.

Examples of the glycidyl ether type epoxy resin include bisphenol type diglycidyl ether, novolak type epoxy resin, and aliphatic polyol polyglycidyl ether.

Specifically, bisphenol-type diglycidyl ethers include bisphenol A or diglycidyl ether of an alkylene oxide adduct thereof, bisphenol F or diglycidyl ether of an alkylene oxide adduct thereof, hydrogenated bisphenol A or an alkylene oxide thereof. Diglycidyl ether of oxide adduct, etc .; Novolak type epoxy resin, phenol novolak type epoxy resin, o-cresol novolak type epoxy resin, diphenylol propane novolak type epoxy resin, etc .; Aliphatic polyol polyglycidyl ether, ethylene glycol di Glycidyl ether, propylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, butanediol diglycide Zyl ether, hexanediol diglycidyl ether, cyclohexane dimethanol diglycidyl ether, polypropylene glycol diglycidyl ether, trimethylolpropane di and / or triglycidyl ether, pentaerythritol tri and / or tetra glycidyl ether, sorbitol hepta and / or hexaglycidyl Ethers and the like; Other epoxy resins include resorcin diglycidyl ether and the like.

Commercial products of these glycidyl ether type epoxy resins include Epicron 840, 840S, 85
0, 850S, 860, 1050, 830, 705, 7
07, 720, 725, N-665 (all manufactured by Dainippon Ink and Chemicals, Inc.), EX-201, EX-211,
EX-212, EX-252, EX-321, EX-6
22, EX-611 (all manufactured by Nagase Kasei Co., Ltd.), S
R-16H, SR-NPG, 16H-DGE low chlorine products (all manufactured by Sakamoto Yakuhin Co., Ltd.) and the like can be obtained.

Oxetane compounds include 1,4-bis [(3-ethyl-3-oxetanylmethoxy) methyl]
Benzene, 1,4-bis [(3-methyl-3-oxetanylmethoxy) methyl] benzene, 3-methyl-3-glycidyl oxetane, 3-ethyl-3-glycidyl oxetane, 3-methyl-3-hydroxymethyl oxetane, 3-ethyl-3-hydroxymethyloxetane and the like.

As commercial products of these oxetane compounds, MOX, XDO (all manufactured by Toagosei Co., Ltd.) and the like can be obtained.

Examples of the alicyclic epoxy compound include 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate, limonene diepoxide and the like.

Commercial products of these alicyclic epoxy compounds include celloxides 2021, 2081, 2083, and 20.
85, 3000 (all manufactured by Daicel Chemical Industries, Ltd.),
Thyracure 6105, 6110, 6128 (all manufactured by Union Carbide) can be obtained.

Among these cationically polymerizable compounds,
A composition comprising a combination of a bisphenol type epoxy resin and an aliphatic diol diglycidyl ether is preferable for achieving the present invention.

The cationic polymerization type photoinitiator used in the present invention is a compound which initiates cationic polymerization of an epoxy group by irradiation with ultraviolet rays. As such a cationic polymerization type photoinitiator, known and commonly used ones can be used.
The cation moiety is aromatic sulfonium, aromatic iodonium, aromatic diazonium, aromatic ammonium,
(2,4-cyclopentadien-1-yl) [(1-methylethyl) benzene] -Fe cation having an anion moiety of BF ₄ ⁻ , PF ₆ ⁻ , SbF ₆ ⁻ , [BX ₄ ] ⁻ (where And X are phenyl groups substituted by at least two or more fluorine or trifluoromethyl groups).

Specifically, the aromatic sulfonium salts include bis [4- (diphenylsulfonio) phenyl] sulfide bishexafluorophosphate, bis [4- (diphenylsulfonio) phenyl] sulfide bishexafluoroantimonate, [4- (Diphenylsulfonio) phenyl] sulfide bistetrafluoroborate, bis [4- (diphenylsulfonio) phenyl]
Sulfide tetrakis (pentafluorophenyl) borate, diphenyl-4- (phenylthio) phenylsulfonium hexafluorophosphate, diphenyl-4
-(Phenylthio) phenylsulfonium hexafluoroantimonate, diphenyl-4- (phenylthio)
Phenylsulfonium tetrafluoroborate, diphenyl-4- (phenylthio) phenylsulfonium tetrakis (pentafluorophenyl) borate, triphenylsulfonium hexafluorophosphate, triphenylsulfonium hexafluoroantimonate, triphenylsulfonium tetrafluoroborate, triphenylsulfonium tetrakis ( Pentafluorophenyl) borate, bis [4- (di (4- (2-hydroxyethoxy)) phenylsulfonio) phenyl] sulfide bishexafluorophosphate, bis [4- (di (4- (2-hydroxyethoxy))) Phenylsulfonio) phenyl] sulfide bishexafluoroantimonate, bis [4- (di (4- (2-hydroxyethoxy)) phenyls] Honio) phenyl] sulfide bistetrafluoroborate, bis [4- (di (4- (2-
Hydroxyethoxy)) phenylsulfonio) phenyl] sulfidetetrakis (pentafluorophenyl)
Borate and the like.

Aromatic iodonium salts include diphenyliodonium hexafluorophosphate, diphenyliodonium hexafluoroantimonate, diphenyliodonium tetrafluoroborate, diphenyliodonium tetrakis (pentafluorophenyl) borate, bis (dodecylphenyl) iodonium hexafluorophosphate, bis (Dodecylphenyl) iodonium hexafluoroantimonate, bis (dodecylphenyl) iodonium tetrafluoroborate, bis (dodecylphenyl) iodonium tetrakis (pentafluorophenyl) borate, 4-methylphenyl-4
-(1-methylethyl) phenyliodonium hexafluorophosphate, 4-methylphenyl-4- (1
-Methylethyl) phenyliodonium hexafluoroantimonate, 4-methylphenyl-4- (1-methylethyl) phenyliodonium tetrafluoroborate, 4-methylphenyl-4- (1-methylethyl) phenyliodonium tetrakis (pentafluorophenyl ) Borate and the like.

Examples of the aromatic diazonium salt include phenyldiazonium hexafluorophosphate, phenyldiazonium hexafluoroantimonate, phenyldiazonium tetrafluoroborate, and phenyldiazoniumtetrakis (pentafluorophenyl) borate.

The aromatic ammonium salts include 1-benzyl-2-cyanopyridinium hexafluorophosphate, 1-benzyl-2-cyanopyridinium hexafluoroantimonate, 1-benzyl-2-cyanopyridinium tetrafluoroborate, 1-benzyl -2-cyanopyridinium tetrakis (pentafluorophenyl) borate, 1- (naphthylmethyl) -2-cyanopyridinium hexafluorophosphate, 1- (naphthylmethyl) -2-cyanopyridinium hexafluoroantimonate, 1- (naphthylmethyl) (2,4-cyclopentadien-1-yl) [such as -2-cyanopyridinium tetrafluoroborate and 1- (naphthylmethyl) -2-cyanopyridinium tetrakis (pentafluorophenyl) borate 1-methylethyl) benzene]
-Fe salt includes (2,4-cyclopentadien-1-yl) [(1-methylethyl) benzene] -Fe (II)
Hexafluorophosphate, (2,4-cyclopentadien-1-yl) [(1-methylethyl) benzene]
-Fe (II) hexafluoroantimonate, 2,4
-Cyclopentadien-1-yl) [(1-methylethyl) benzene] -Fe (II) tetrafluoroborate, 2,4-cyclopentadien-1-yl) [(1-
Methylethyl) benzene] -Fe (II) tetrakis (pentafluorophenyl) borate and the like.

Commercial products of these cationic polymerization type photoinitiators include, for example, UVI 6990, UVI 6974 (manufactured by Union Carbide), SP-150 and SP-170.
(Made by Asahi Denka Co., Ltd.), FC-508, FC-512 (3
M), Irgacure 261 (Ciba-Geigy), RHODORSIL PI2074 (Rhodia) and the like are available.

The above-mentioned cationic polymerization type photoinitiators may be used alone or in combination of two or more. The amount added is 0.2 to 10 parts, more preferably 0.2 to 4 parts by weight, as an effective component amount per 100 parts by weight of the ultraviolet curable composition. If the amount is less than 0.2 part by weight, sufficient curing cannot be obtained, and if the amount is more than 4 parts by weight, long-term reliability decreases.

Further, with respect to the cationic polymerization type photoinitiator,
In order to further improve the curability, as a sensitizer, for example,
Bilen, perylene, 2,4-diethylthioxanthone,
In addition to phenothiazine, 2-hydroxy-2-methyl-1
Photo-radical polymerization initiators such as -phenylpropan-1-one and 1-hydroxycyclohexyl phenyl ketone can also be used in combination.

If necessary, the composition of the present invention may contain a polyol, a thermoplastic resin, a leveling agent, an antioxidant, a silane coupling agent and the like.

The cationic ultraviolet curable composition may contain a known and used filler. Such fillers include, for example, fine particle fillers such as resin beads, silica, and alumina. By adding these fillers, mechanical strength can be enhanced and dimensional accuracy can be improved. The amount of the filler to be added may be selected in the range of about 0.1 to 20 parts per essential component of the composition depending on the purpose.

In order to irradiate the falling cationic UV-curable composition with ultraviolet rays, an ultraviolet irradiation means may be provided on the side of the falling cationic UV-curable composition. Known lamps such as a xenon lamp, a xenon-mercury lamp, and a metal halide lamp may be used.

In order to uniformly irradiate ultraviolet rays to the falling cationic ultraviolet curable composition, the diameter of the falling cationic ultraviolet curable composition may be reduced by reducing the nozzle diameter. It is also effective to irradiate ultraviolet rays from all around the falling cationic ultraviolet curable composition. As a specific means for irradiating ultraviolet rays from all around the falling cationic ultraviolet curable composition, a plurality of ultraviolet irradiating means may be arranged around the falling cationic ultraviolet curable composition to irradiate ultraviolet rays. Can be considered,
If the surroundings of the falling cationic UV-curable composition are surrounded by a reflector and the inside of the surroundings is irradiated with UV rays, a plurality of UV irradiation means for irradiating UV rays from the entire periphery of the composition are prepared. So there ’s no need to
Further space saving can be achieved and cost is also advantageous.

The amount of ultraviolet irradiation before the cationic ultraviolet ray curable composition is discharged from the nozzle, falls, and reaches the injection port of the mold is usually 10 to 300 mJ / c.
m2, preferably 50 to 200 mJ / cm2.

In the present invention, the cationic ultraviolet curable composition is poured into a mold. The mold for casting employed in the present invention may be any of known and publicly used ones, and may be one having excellent heat resistance such as metal, or may be one having non-heat resistance such as resin. Since it can withstand repeated use sufficiently, cost can be reduced, which is preferable. In the present invention, since it is not necessary to perform ultraviolet irradiation from the outside of the mold into which the composition has been injected, this mold may be light-transmitting or light-impermeable. .

Further, a three-dimensional object can be manufactured in a short delivery time and at low cost by forming a casting mold by a conventional RP technique, for example, an optical shaping means.

When a mold is prepared by optical shaping means, the substrate employed generally has a low viscosity, a high curing speed, an excellent curing accuracy, and a small volume shrinkage during curing. It is desirable that the cured product has properties such as excellent mechanical properties and low irritation to the skin.

As well-known and publicly used resins used for optical shaping means, there are TSR series (TSR-8 manufactured by Teijin Seiki Co., Ltd.).
00, TSR-810, TSR-820, etc.), Asahi Denka Kogyo Co., Ltd. HS series (HS-673, HS-680), JSR Co., Ltd.
SCR series (SCR-701, SCR-801) and SL series (SL-518) manufactured by Ciba Specialty Chemicals Co., Ltd.
0, SL-5410) and the like.

Known and publicly-known optical molding apparatuses for forming a desired mold using the resin base material include SOLIFORM series (SOUP1000GA, -1000GS, etc.) manufactured by Teijin Seiki Co., Ltd., SCS manufactured by SONY Corporation, and the like. JSC series (SCS-300P, -1000HD, -200
0, JSC-2000, -3000 etc.) and SOUP series (SOUP250GH, SOUP1000GA, SOUPI) manufactured by NTT Data Seamet Co., Ltd.
I600GS).

Other methods for preparing a casting mold include, besides the stereolithography method, a thin film lamination method (LOM method), a molten resin extrusion method (FDM method), a powder sintering method, an ink jet method, and the like. Is mentioned. Known and publicly-known devices adopting the LOM method include LOM-1015E, -2 manufactured by Toyota Industries Co., Ltd.
030H, etc., FDM-2000, -8000 etc. manufactured by Marubeni Solution Co., Ltd. as a publicly known device adopting the FDM method, and EOSINT- manufactured by Hitachi Zosen Information System Co., Ltd. as a publicly known device adopting the powder method M250, -P350, etc., respectively. Which method is adopted depends on the dimensional accuracy of the product,
The selection may be made in consideration of mechanical strength, cost, delivery date, and the like.

An apparatus for producing a three-dimensional object according to the present invention (hereinafter referred to as the present apparatus) is provided with a nozzle for discharging a cationic ultraviolet curable composition and an ultraviolet ray in a path between the nozzle and the injection port of the mold. And an ultraviolet irradiation means for irradiation.

In particular, means for discharging the cationic UV curable composition from the nozzle and dropping it, and UV irradiation for irradiating UV rays until the falling cationic UV curable composition reaches the injection port of the mold More desirably, means are provided.

In the present apparatus, by providing an ultraviolet irradiation prevention cover on the periphery of the discharge section of the nozzle, it is possible to prevent the cationic ultraviolet curable composition from being hardened and clogged by ultraviolet leakage light at the nozzle tip. Since it is possible, a device with a high operation rate can be realized, which is preferable.

[0047]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited only to the embodiments.

Example 1 As shown in FIG. 1, a rectangular parallelepiped having a size of 25 mm × 25 mm × 75 mm provided with an injection port and an air port was prepared from a glass plate and used as a casting mold 10. The glass plate is a material that transmits ultraviolet light. In FIG. 1, 11 is an inlet, and 12 is an air port.

FIG. 2 shows the configuration of an apparatus used to drop and inject a cationic ultraviolet curable composition resin into the rectangular parallelepiped mold. In FIG. 2, reference numeral 20 denotes a dispenser for dropping the cationic ultraviolet curable resin, 21 denotes a shutter, 22 denotes a housing, 23 denotes an ultraviolet light source lamp, and 24 denotes a fall trajectory of the cationic ultraviolet curable resin from cooling wind. This is a quartz tube. The inside of the housing 22 constitutes an elliptical cylindrical optical system formed to reflect ultraviolet rays efficiently and to converge the ultraviolet rays efficiently on the orbit of the ultraviolet curable resin composition. With such an optical system, it becomes possible to irradiate the falling cationic ultraviolet curable resin with ultraviolet rays from all directions.

As the dispenser 20, a model 1500 DV (nozzle inner diameter: about 1.2 mm) manufactured by EFD, USA, and as an unillustrated ultraviolet irradiating device including an ultraviolet light source lamp 23, an I250 type manufactured by Fusion (light emission length: 25 cm) were used. . As the ultraviolet light source lamp 23, a D bulb manufactured by the company was used.

The cationic UV-curable composition includes:
1,4-cyclohexanedimethanol diglycidyl ether (Likaresin DME-100, manufactured by Shin Nippon Rika Co., Ltd.) 1
00 parts, photocationic polymerization initiator UVI6990 (manufactured by Union Carbide) 2 parts, silicone oil L7604
0.5 part (manufactured by Nippon Unicar Co., Ltd.) was mixed and dissolved at 60 ° C. for 1 hour to prepare a pale yellow transparent photocationically polymerizable composition. The viscosity was 55 mPa · s (25 ° C.).

As the ultraviolet intensity, an ultraviolet irradiation device I25
The cationic ultraviolet curable resin was injected into the mold by adjusting the discharge pressure of the dispenser at a rate of about 0.5 g per second at 50% of the large output of the 0 type. Fifteen minutes after the end of the injection, the cured rectangular solid was taken out of the mold, cut and observed inside, and it was found that the rectangular solid was completely cured up to the deep part.

<Comparative Example> Next, as a comparative example, after using the same casting mold 10 and injecting a cationic ultraviolet curable resin (the same one used in the examples) which is not irradiated with ultraviolet rays,
Irradiation is performed 10 times using an ultraviolet irradiator that gives 1000 mJ / cm ² per pass (accordingly, the total irradiation amount is
² ) The inside of the cured product was examined. The inside of the cured product was cured only about 1 to 2 mm from the surface, and the portion deeper than that remained liquid.

[0054]

According to the present invention, a cationic three-dimensional object having no curing unevenness can be obtained because the cationic ultraviolet-curable resin is irradiated with ultraviolet rays in advance and then cast. That is, by irradiating the ultraviolet rays until the cationic type ultraviolet curable resin reaches the mold for casting from the nozzle, it is possible to uniformly irradiate the inside of the casting with the ultraviolet rays. Does not occur. In addition, since the curing reaction generates less heat, it is not necessary to form the mold with a heat-resistant one. For this reason, it is possible to adopt even a non-heat-resistant mold made by the RP method such as an optical molding means.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a casting mold made of an ultraviolet-transparent glass plate used in Examples.

FIG. 2 is a cross-sectional view illustrating a configuration of an ultraviolet irradiation device used in an example.

FIG. 3 is a perspective view showing a rectangular parallelepiped molded product created in the example.

[Description of Signs] 10 ... Casting mold 11 ... Filling port 12 ... Air port 20 ... Dispenser 21 ... Shutter 21a ... Shutter open state 21b ... Shutter closed state 22 ... Housing 23 ... Ultraviolet light source lamp (D Valve) 24 ... Quartz tube 30 ... Casting material created in Example

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazu Shimizu 3-19-19 Himonya, Meguro-ku, Tokyo F-term (reference) 4F213 AA36 AA39 AB04 AB11 AB22 AC00 AJ03 WA02 WA03 WA25 WA32 WA39 WA53 WA56 WA86 WA87 WB01 WC02 WE01 WE25 WF01 WF27 WF29 WL12 WL32 WL92 WL95 WW33

Claims (10)

[Claims] 1. A three-dimensional object comprising: a step of irradiating a cationic ultraviolet-curable composition with ultraviolet light; and a step of injecting the ultraviolet-irradiated cationic ultraviolet-curable composition into a mold. Manufacturing method. 2. The method for producing a three-dimensional object according to claim 1, wherein ultraviolet rays are irradiated through a path between a nozzle for discharging the cationic ultraviolet curable composition and an inlet of the mold. 3. A method for producing a three-dimensional object according to claim 2, wherein the ultraviolet ray is irradiated before the cationic ultraviolet curable composition falling from the nozzle reaches the injection port of the mold. . 4. The method according to claim 3, wherein ultraviolet light is irradiated from all around the falling cationic UV curable composition.
3. The method for producing a three-dimensional object according to item 1. 5. The method for manufacturing a three-dimensional object according to claim 1, wherein said mold is made of resin. 6. A method for manufacturing a three-dimensional object according to claim 1, wherein said mold is formed by optical shaping means. 7. The method for producing a three-dimensional object according to claim 1, wherein the cationic ultraviolet curable composition contains a filler. 8. An apparatus for producing a three-dimensional object, comprising: a nozzle for discharging a cationic ultraviolet curable composition; and an ultraviolet irradiation means in a path from the nozzle to an injection port of the mold. 9. A means for discharging a cationic UV-curable composition from a nozzle and dropping the UV-ray, and irradiating an ultraviolet ray until the falling cationic UV-curable composition reaches an injection port of a mold. 9. The apparatus for producing a three-dimensional object according to claim 8, comprising means and a mold into which a cationic ultraviolet curable composition is injected. 10. The apparatus for manufacturing a three-dimensional object according to claim 8, wherein an ultraviolet irradiation prevention cover is provided on a periphery of a discharge portion of the nozzle.