JP5668327B2 - Slurry for modeling and modeling method - Google Patents

Description

The present invention relates to a modeling slurry used for modeling and a modeling method using the modeling slurry.

Conventionally, an additive manufacturing method is frequently used as a method (rapid prototyping) of a prototype quickly. In the additive manufacturing method, after a model of a three-dimensional CAD model is divided into a number of two-dimensional cross-sectional layers, a layered structure corresponding to each two-dimensional cross-sectional layer is sequentially formed and stacked to form a three-dimensional object. To do. Specifically, for example, as described in Patent Document 1, first, particles including ceramic, metal, or the like are formed in layers. Next, a liquid binding liquid for binding particles in a part of the layer made of particles is discharged to the layer made of particles by, for example, an ink jet type droplet discharge device. Then, the liquid binding liquid that has penetrated into the gaps between the particles binds the particles together with hardening thereof, thereby forming a layered structure corresponding to the two-dimensional cross-sectional layer. Thereafter, similarly, formation of a layer made of these particles and discharge of a liquid binding liquid are alternately repeated to form a shaped article.

Japanese Patent No. 2729110

As described above, when a granule is used as a forming material of a modeled object, vibration is given to the layer of the granule, or a liquid binding liquid is discharged to the layer of the granule. Part of the particles often scatters from the layer consisting of the particles. The scattered particles diffuse in the space in which the structure is formed, and adhere to the droplet discharge head of the droplet discharge device that discharges the liquid binding liquid. In this way, the particles adhering to the droplet discharge head may contaminate the droplet discharge head and block the nozzles provided in the droplet discharge head, thereby hindering droplet discharge. Note that the problem due to the scattering of particles as described above is not limited to the layered modeling method using the droplet discharge device, but is a problem that is generally common to the method of modeling using particles.

The present invention has been made in view of such a conventional situation, and an object of the present invention is to provide a molding slurry capable of suppressing scattering of particles at the time of modeling using the particles, and this modeling. Another object of the present invention is to provide a modeling method using a slurry for use.

This invention is a slurry for modeling for forming a modeled object with particles, and comprises the hydrophobic particles that constitute the modeled object and the modeled object, and is similar to the hydrophobic particles And a hydrophobic liquid composed of at least one of a certain monomer and oligomer.

Hydrophobic particles and hydrophobic liquids of the same type, more precisely, the main skeleton of the repeating unit structure constituting the hydrophobic particles is the same as the main skeleton of the unit structure of the hydrophobic liquid Or a side chain functional group in the unit structure and a part of the main skeleton in the unit structure are different,
Mix the hydrophobic liquid with the main skeleton of the unit structure partially overlapping so that the interaction between the hydrophobic liquid and the hydrophobic particles is almost the same as the interaction between the hydrophobic particles Then, the hydrophobic particles and the hydrophobic liquid interact through a common structure. For this reason, the hydrophobic particles interact with each other through the hydrophobic liquid existing around each other.

According to the above invention, since the molding slurry is composed of hydrophobic particles and the same type of hydrophobic liquid, even if vibration is given to the slurry during formation of the modeled object The hydrophobic particles are held in the structure due to the interaction with the hydrophobic particles adjacent to the hydrophobic particles, thereby preventing the particles from being scattered.

In the present invention, the hydrophobic particles are made of an acrylic resin, and the hydrophobic liquid is made of an acrylate compound.
According to this invention, since both the hydrophobic particles and the hydrophobic liquid are compounds having an acrylic skeleton as the main skeleton, the hydrophobic particles are present in the hydrophobic liquid around each of them. It will surely interact through the body.

In the present invention, the hydrophobic liquid contains a liquid repellent group.
According to this invention, since the hydrophobic liquid body which is a component of the modeling slurry contains a liquid repellent group, liquid repellency can be imparted to the modeling slurry. Therefore, when forming a modeling object, for example, after forming a modeling slurry into a layer shape, a binding liquid that binds hydrophobic particles is infiltrated into a predetermined region of the layer. It is possible to suppress the binding liquid from spreading out and the binding liquid from oozing out from the permeation region. Therefore, it is possible to improve the accuracy related to the shape of the shaped object formed by the particles and the liquid material bound by the binding liquid.

In this invention, a fiber material is contained as a constituent material of the slurry for modeling.
According to this invention, the mechanical strength can be increased by including the fiber material in the modeling slurry, and consequently the mechanical strength of the modeled object formed using the modeling slurry is increased. Can do.

The present invention relates to a modeling method for forming a modeled article by binding particles through a binding liquid, and comprising hydrophobic particles and monomers and oligomers similar to the hydrophobic particles A layer forming step of forming on the substrate a layer composed of a slurry containing at least one hydrophobic liquid material, and the liquid binder is allowed to penetrate part of the layer and then the binder liquid is cured. By the binding step of binding the particles and the hydrophobic liquid material, and by flowing a liquid through the layer containing the cured binding liquid, the region other than the region where the binding liquid has permeated Removing from the layer.

According to the present invention, when forming a modeled object, the modeled object is composed of a hydrophobic particle that forms the modeled object, and a hydrophobic liquid material composed of at least one of a monomer and an oligomer similar to the hydrophobic particle. Slurry is used. For this reason, even if vibration is given to the slurry during formation of the shaped object, scattering of the particles is suppressed by the amount that the affinity for the hydrophobic particles acts on the hydrophobic particles from the hydrophobic liquid. Become so.

In the present invention, the hydrophobic particles, the hydrophobic liquid, and the binding liquid are the same system.
When forming the modeling object, for example, after forming the modeling slurry in a layered form, for example, the hydrophobic particles and the hydrophobic liquid material, which are constituent materials of the modeling slurry, are bound to a predetermined region of the layer. It is assumed that the landing liquid penetrates. As described above, the modeling slurry is composed of hydrophobic particles and a hydrophobic liquid. Therefore, although the hydrophobic particles interact with each other due to the presence of the hydrophobic liquid material, the hydrophobic particles are not related to the binding liquid, that is, the hydrophobic particles with respect to the binding liquid. When the body is difficult to get wet, when the binding liquid penetrates into the molding slurry, it tends to be ejected from the penetration area. As a result, the hydrophobic particles contained in the binding liquid permeation region, in other words, the formation region of the modeled object are reduced, so that the mechanical strength of the modeled product decreases or the shape of the modeled product becomes defective. Or

In this respect, according to the above-described invention, the hydrophobic particles and the hydrophobic liquid constituting the slurry for modeling and the binding liquid are the same system, and therefore the hydrophobic particles with respect to the binding liquid. Due to the wettability of the liquid, hydrophobic particles are easily taken into the binding liquid. Therefore, a decrease in mechanical strength of the modeled object and a defective shape of the modeled object are suppressed.

The flowchart which shows the procedure in one Embodiment of the modeling method concerning this invention. (A) (b) (c) The figure which shows typically each process of the modeling method along a procedure. (A) (b) (c) The figure which shows typically each process of the modeling method along a procedure. (A) (b) (c) (d) The figure which shows typically each process of the modeling method which concerns on a modification along a procedure. (A) (b) (c) The figure which shows typically each process of the modeling method which concerns on a modification along a procedure.

Hereinafter, an embodiment of a modeling slurry and a modeling method using the modeling slurry according to the present invention will be described with reference to FIGS.
[Composition of slurry for modeling]
First, the composition of the molding slurry will be described.

The modeling slurry of the present embodiment is a suspension in which the following three materials are kneaded.
(A) Hydrophobic granule (B) Hydrophobic liquid The said (A) hydrophobic granule is a main constituent material of the molded article formed using the slurry for modeling. As the hydrophobic particles, hydrophobic resin particles such as acrylic resin powder, silicone resin powder, and acrylic silicone resin powder can be used. In addition, the hydrophobic particle | grains in this Embodiment are the particle | grains which do not melt | dissolve 0.1g or more with respect to 100g of water.

The (B) hydrophobic liquid includes at least one of a monomer and an oligomer similar to the hydrophobic particles. Oligomers include those obtained by polymerizing two or more molecules and 100 or less molecules of a single kind of monomer, and those obtained by copolymerizing two or more molecules and two or more molecules and 100 or less molecules in an arbitrary ratio.

Here, the term “same system” means that the main skeleton of the repeating unit structure constituting the hydrophobic particles is the same as the main skeleton of the unit structure of the hydrophobic liquid. In addition, although the system is different from the side chain functional group in the unit structure and part of the main skeleton in the unit structure, the interaction between the hydrophobic liquid and the hydrophobic particles is the interaction between the hydrophobic particles. It means that the main skeletons of the unit structure partially overlap each other to the extent that they are substantially the same. Therefore, when each of the hydrophobic particles and the hydrophobic liquid is a copolymer, those in which the composition ratios of the atoms contained in them are not the same are assumed to be the same system. The hydrophobic liquid is a liquid that does not dissolve 1 g or more in 100 g of water.

On the other hand, a molecule having a liquid repellent group may be used for the hydrophobic liquid. By selecting a molecule having a liquid repellent group as the hydrophobic liquid, liquid repellency can be imparted to the molding slurry.

In the slurry in which the above two materials are kneaded, the hydrophobic particles and the hydrophobic liquid interact with each other through a common structure. They interact with each other through the ionic liquid. Therefore, even when vibration is given to the slurry during formation of a modeled object, the scattering of the particles is suppressed because the affinity for the hydrophobic particles acts on the hydrophobic particles from the hydrophobic liquid. Will come to be.

Moreover, when the molecule | numerator which has a liquid repellent group is employ | adopted as a hydrophobic liquid body, liquid repellency will be provided to the slurry for modeling. Thereby, for example, when the binding liquid for binding the hydrophobic particles is infiltrated into a predetermined region of the layer formed by the modeling slurry, the binding liquid spreads in the layer, and the It is possible to prevent the binding liquid from oozing out from the predetermined region. Therefore, the accuracy related to the shape of the modeled object is improved.

Specific examples of (A) hydrophobic particles and (B) hydrophobic liquid are described below.
[(A) Hydrophobic granules]
The powder resin material as the hydrophobic particles preferably contains true spherical particles.
Thereby, the controllability concerning the shape of the modeled object, particularly the controllability of the shape at the sides and corners that define the outer shape of the modeled object is improved.

Moreover, when forming a modeling thing by the well-known lamination modeling method using the slurry containing the said powder resin material, the particle size of a powder resin material is below the thickness per slurry layer formed with a slurry. It is preferable. Furthermore, it is more preferable that it is 1/2 or less of the thickness of a slurry layer. Thereby, the volume filling rate of the granule in a slurry layer can be improved, and the mechanical strength of a molded article can be improved by extension.

In addition, the powder resin material preferably contains particles having different particle diameters within the above particle diameter range. The particle size distribution in the molding slurry may be a dispersion close to a Gaussian distribution (normal distribution), or a dispersion having a maximum value of the particle size distribution on the maximum diameter side or the minimum diameter side ( (Single dispersion). When the particle size of the granules contained in the powder resin material is a single value, the volume filling rate of the granules when forming the slurry exceeds 69.8%, which is the theoretical value at the closest packing. In fact, the filling rate is about 50 to 60%.
As described above, particles having different particle diameters are included in the powder material, in other words, if the particle diameters are distributed with a range, for example, by particles having relatively large particle diameters. The volume filling factor is improved by disposing particles having a relatively small particle diameter in the formed void. Thereby, the mechanical strength of a molded article can be improved.

For example, when the thickness of the slurry layer is 100 μm, the particle size of the granules contained in the powder resin material is preferably 100 μm or less, and further, the average particle size is 20 μm to 40 μm, and from several μm to It is more preferable to have a dispersion of 100 μm or less.

The powder resins satisfying the above conditions are listed below.
Examples of the silicone resin powder material include Tospearl 1110 (particle diameter 11 μm), Tospearl 120 (particle diameter 2 μm), Tospearl 130 (particle diameter 3 μm), Tospearl 145 (
Particle size 4.5 μm), Tospearl 2000B (particle size 6 μm), Tospearl 3120 (particle size 1
2 μm) (manufactured by Momentive Performance Materials) (Tospearl: registered trademark) and the like.

As the acrylic silicone resin powder, for example, Charine R-170S (particle size 30 μm)
m) (manufactured by Nissin Chemical Industry Co., Ltd.) (Charine: registered trademark).
Examples of the acrylic resin include Eposter L15 (particle size 10 to 15 μm), Eposter M05 (particle size 4 to 6 μm), Epostor GPH 40 to H110 (particle size 4 to 11 μm) (
(Nippon Shokubai Co., Ltd.) (Eposter: registered trademark).
[(B) Hydrophobic liquid]
As the hydrophobic liquid, monomers and oligomers similar to the hydrophobic particles can be used. As described above, the same system means that the main skeleton of the repeating unit structure constituting the hydrophobic particles is the same as the main skeleton of the unit structure of the hydrophobic liquid. And the same line is
Although the side chain functional group in the unit structure and a part of the main skeleton in the unit structure are different, the interaction between the hydrophobic liquid and the hydrophobic particles is approximately the same as the interaction between the hydrophobic particles Furthermore, it means that the main skeletons of the unit structure partially overlap. Further, as described above, the oligomer used here is one in which the unit structure is polymerized by 2 to 100 molecules.

Specifically, when the silicone resin powder material is used as the hydrophobic particles, an alkoxysilicon compound that is a unit structure thereof may be used. When an acrylic resin is used as the hydrophobic particles, An acrylate which is a unit structure may be used. On the other hand, when an acrylic silicone resin powder material is used as the hydrophobic particles, the unit structure includes both the acrylate and the alkoxysilicon compound, and therefore the hydrophobic liquid material includes acrylate monomers and oligomers. Any of monomers and oligomers of alkoxysilicon compounds can be used. In addition, as a hydrophobic liquid, in order to enable interaction with the said hydrophobic particle among the said monomer and oligomer, what has fluidity | liquidity on the conditions of normal temperature normal pressure is used.

Examples of the hydrophobic liquid satisfying the above conditions are given below.
Acrylic monomers include acrylic acid, monofunctional acrylates (methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, isobutyl acrylate, t-butyl acrylate, isobornyl acrylate, cyclohexyl acrylate, dicyclopentenyl acrylate, Cyclopentenyloxyethyl acrylate, dicyclopentanyl acrylate, benzyl acrylate, phenoxyethyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 2-methoxyethyl acrylate, tetrahydrofurfuryl acrylate, ethyl carb Tall acrylate), bifunctional acrylate (tricyclodecanedimeta) Diacrylate, 1,4-butanediol acrylate, 1,10-decanediol acrylate, 1,6-hexanediol acrylate, 1,9-nonanediol acrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, tetraethylene Glycol diacrylate) and various acrylates such as three or more polyfunctional acrylates (pentaerythritol acrylate, trimethylpropane triacrylate, ditrimethylolpropane tetraacrylate).

Examples of silicone monomers include monofunctional silicates (trimethylmethoxysilane, trimethylethoxysilane, hexamethyldisiloxane), bifunctional silicates (dimethyldimethoxysilane, diphenyldiethoxysilane), and three or more polyfunctional silicates (
Methyltriethoxysilane, ethyltrimethoxysilane, phenyltrimethoxysilane,
And various alkoxysilicon compounds such as tetramethoxysilane and tetraethoxysilane.

Examples of acrylic oligomers include BYK-350, BYK-355, and BYK-.
356, BYK-358N, BYK-361N (manufactured by Big Chemie Japan Co., Ltd.) and the like. Not limited to this, among the acrylic monomers, two or more molecules of one kind are included.
It is possible to use an oligomer obtained by polymerizing a molecule or less, and an oligomer obtained by copolymerizing two or more molecules and two or more molecules at an arbitrary ratio.

Examples of silicone oligomers include BYK-301, BYK-302, and BYK.
-307, BYK-322, BYK-323, BYK-331, BYK-333 (manufactured by Big Chemie Japan Co., Ltd.), KF-354L, KF-640, KF-6011 (manufactured by Nissin Chemical Industry Co., Ltd.), etc. Is mentioned. Not limited to this, among the silicone-based oligomers,
An oligomer obtained by polymerizing one molecule of 2 to 100 molecules and an oligomer obtained by copolymerizing plural molecules of 2 to 100 molecules in an arbitrary ratio can be used.

When either the silicone resin powder material or the acrylic silicone resin powder is used as the hydrophobic particle, the silicone monomer and oligomer can be used. In addition, about a silicone type monomer and an oligomer, you may make it use either the said monomer or the said oligomer. Further, a plurality of monomers or a plurality of oligomers may be used. Further, the above monomer and oligomer may be used in combination.

On the other hand, when either an acrylic resin or an acrylic silicone resin is used as the hydrophobic particles, the above acrylic monomers and oligomers can be used. In addition,
About an acryl-type monomer and an oligomer, you may make it use either the said monomer or the said oligomer. Further, a plurality of monomers or a plurality of oligomers may be used. Further, the above monomer and oligomer may be used in combination.

Examples of the acrylic monomer containing fluorine include 2,2,2-trifluoroethyl acrylate, 2,2,3,3-tetrafluoropropyl acrylate, 1H, 1H,
And 5H-octafluoropentyl acrylate.
[Combination ratio]
When (A) Charine R-170S is used as the hydrophobic particles and (B) BYK350 which is an acrylic oligomer is used as the hydrophobic liquid, these materials are preferably blended in the following proportions.
(A) :( B) = 5: 1 (unit: g)
A slurry for modeling can be prepared by kneading these materials. In addition, the mechanical strength in this modeling thing is raised, so that the filling rate of the hydrophobic granule becomes high in a modeling thing. Therefore, in order to increase the mechanical strength of the shaped object, the volume of the hydrophobic liquid material is smaller than the gap between the closely packed hydrophobic particles so that the hydrophobic particles are packed closest. Such a blending ratio is preferable.
[Modeling method]
Next, the modeling method using the said modeling slurry is demonstrated with reference to FIGS.

FIG. 1 shows each step of the modeling method along the procedure, and FIGS. 2 and 3 schematically show processing performed in each step.
In the modeling method in the present embodiment, first, a sacrificial layer forming step (step S11: FIG.
a)), for example, on a substrate 11 such as a glass substrate or a plastic sheet.
By applying the slurry so as to be 00 μm, the sacrificial layer 12 is formed as the lowermost layer of the slurry layer. For applying the slurry, a known method such as a squeegee method, a screen printing method, a doctor blade method, and a spin coating method can form a slurry layer having a substantially uniform thickness on the substrate 11. Can be used.

Next, in the slurry layer forming step (step S12: (b)), the slurry is applied to form a slurry layer 21a so that the thickness becomes 100 μm. The slurry layer 21
Also in the formation of a, the known method can be used as in the formation of the sacrificial layer 12.

Then, in the ultraviolet curable resin dropping step (step S13: FIG. 2C), the droplet discharge device 31 is formed on the modeling portion 22a for forming a part of the modeling object 20 (FIG. 3) in the slurry layer 21a. To UV ink I containing an ultraviolet curable resin as a binding liquid.

As described above, since the molding slurry is composed of the hydrophobic particles and the same type of hydrophobic liquid, the hydrophobic particles existing around each of the hydrophobic particles are separated from each other by the hydrophobic liquid. To interact. That is, in the slurry for modeling, since the hydrophobic particles are present in the structure formed by such interaction, at the time of forming the modeled object, for example, due to the discharge of UV ink I as described above, etc. Even if vibration is given to the slurry layer 21a,
Hydrophobic granules are retained in the structure. That is, it is possible to suppress the scattering of the hydrophobic particles during the formation of the shaped object.

The UV ink I includes a cationic polymerization type ultraviolet curable resin that cures by a polymerization reaction using a cation as an active species, and a radical polymerization type ultraviolet curable resin that cures by a polymerization reaction using a radical as an active species. There is a thing. In the present embodiment, any of these UV inks I can be used.

However, the UV ink I is dropped onto the modeling portion 22a of the slurry layer 21a and then cured together with the hydrophobic particles included in the modeling portion 22a. Therefore, UV ink I
In particular, it is preferable to select compatible materials for the ultraviolet curable resin and the hydrophobic particles. That is, it is preferable to use the same material for the UV ink I and the hydrophobic particles, for example, the acrylic UV ink I and the acrylic resin powder. Alternatively, it is preferable to use UV ink I and hydrophobic particles in which a material similar to UV ink I is introduced on the surface, for example, acrylic UV ink and acrylic silicone resin powder. In addition, the same system in the UV ink I and the hydrophobic particles is synonymous with the same system in the hydrophobic particles and the hydrophobic liquid.

In addition, since the molding slurry used for forming the slurry layer 21a is composed of hydrophobic particles and a hydrophobic liquid, the hydrophobic particles are intervened by the hydrophobic liquid. Even though they are interacting with each other, when the UV ink I is dropped onto the modeling portion 22a, the hydrophobic particles contained in the modeling portion 22a are likely to be ejected out of the modeling portion 22a due to the permeation thereof. In this regard, if the hydrophobic particles constituting the modeling slurry and the UV curable resin contained in the UV ink I are the same system, the wettability of the hydrophobic particles with respect to the UV curable resin,
The hydrophobic particles are less likely to be ejected out of the modeling portion 22a by the penetration of the UV ink I.
Therefore, since the reduction | decrease of the hydrophobic granule contained in the molded article formed by hardening | curing the slurry layer 21a can be suppressed, the fall of the mechanical strength of a molded article and the shape defect of a molded article can be suppressed.

Examples of the radical polymerization type ultraviolet curable resin include acrylic resins and unsaturated polyester resins. Examples of acrylic resins include polyester acrylate resins, epoxy acrylate resins, urethane acrylate resins, and polyether acrylate resins.

Examples of the cationic polymerization type ultraviolet curable resin include epoxy resins, oxetane resins, vinyl ether resins, and silicone resins. Examples of silicone resins include acrylic silicone resins, polyester silicone resins, epoxy silicone resins, and mercapto silicone resins.

The various UV inks I may include pigments of each color. Examples of yellow pigments include Fast Yellow (CIPigment Yellow 74) and Disazo Yellow (C.
I. Pigment Yellow 16, CIPigment Yellow 128), Isoindolinone Yellow (CI
Pigment Yellow 109). As magenta pigment, quinacridone magenta (
CIPigment Red 122) and unsubstituted quinacridone (CIPigment Violet 19). Examples of cyan pigments include phthalocyanine blue (CIPigment Blue 15: 3, CIPi
gment Blue 15: 4). Examples of the black pigment include carbon black. An example of a white pigment is titanium oxide. In addition to these pigments, the UV ink I may contain a matting agent such as matting silicone powder or a fluorescent pigment.

Thereafter, in the ultraviolet irradiation process (step S14: FIG. 3A), the slurry layer 21a.
The modeling portion 22a is cured by irradiating the entire surface with the ultraviolet ray L. UV L
May not be applied to the entire slurry layer 21a, but may be applied to at least the modeling portion 22a of the slurry layer 21a. In addition, the irradiation of the ultraviolet light L is performed alternately with the dropping of the UV ink I onto the modeling portion 22a by, for example, the ultraviolet irradiation device mounted on the droplet discharge device 31, or separately from the droplet discharge device 31. It can be performed for each slurry layer by the ultraviolet irradiation device provided, or can be performed for a plurality of slurry layers at once.

Incidentally, in the present embodiment, the hydrophobic particles, the hydrophobic liquid, and the hydrophobic liquid by the UV curable resin, even if all of the UV curable resin contained in the UV ink I are the same system, Curing proceeds only in the shaped part 22a where the ultraviolet curable resin is dropped. This is because when the oligomer is used as the hydrophobic liquid, it is difficult for the ends of the oligomers interposed between the hydrophobic particles to be disposed within a predetermined distance such that polymerization proceeds. This is because the blending ratio of the hydrophobic liquid is set. In addition, when a monomer is used as the hydrophobic liquid, the monomer and the monomer are used so that the energy required for the polymerization between the monomers is sufficiently higher than the energy required for the polymerization of the ultraviolet curable resin. This is because a combination with an ultraviolet curable resin is selected.

If the monomer and oligomer having a liquid repellent group are used as the hydrophobic liquid, the UV ink I dropped on the modeling portion 22a of the slurry layer 21a is along the surface of the hydrophobic particles at the dropping position. It permeates in the vertical direction and becomes difficult to exude in a direction parallel to the thickness direction of the slurry layer 21a. Further, since the hydrophobic particles interact with each other through the hydrophobic liquid having such a liquid repellency, the hydrophobic particles may be moved by the flow of the UV ink I penetrating in the vertical direction. No. Therefore, the accuracy related to the shape of the modeling part 22a and, consequently, the shape of the modeled object 20 is improved.

The modeling portion 22a cured by the dropping of the UV ink I and the irradiation of the ultraviolet ray L as described above
A part of the shaped article 20 is configured. On the other hand, in the area other than the modeling part 22a in the slurry layer 21a, the modeling part 22a formed on the same slurry layer 21a, the modeling part 22b formed on the slurry layer 21b on the upper part of the slurry layer 21a, and the like mechanically. It functions as the support part 23a to support. Thereby, for example, as illustrated in FIG. 3B, the modeled object 20 having an overhanging portion in which the upper layered portion 22 b projects in a direction perpendicular to the stacking direction is formed as compared with the lower layered portion 22 a. Even in this case, there is no need to separately form a support portion that supports the overhang portion. In addition, in the state where the slurry layer exists in the lower layer of the overhanging portion, the model 2
Since 0 is formed, it can suppress that a projection part lacks in the middle of formation of the molded article 20. The binding step is composed of the ultraviolet curable resin dropping step and the ultraviolet irradiation step.

From the slurry layer forming step (step S12) to the ultraviolet irradiation step (step S14).
The three steps up to) are repeatedly performed until all of the modeling parts constituting the modeled object 20 are formed. For example, as illustrated in FIG. 3B, the modeled object 20 has five slurry layers 21 a and 2.
When comprised from 1b, 21c, 21d, and 21e, the said 3 process is repeated 5 times in order. Thus, by repeating the four steps from the layer formation step to the ultraviolet irradiation step in order,
Since the laminated body comprised from a some layer can be formed, the freedom degree which concerns on the shape of the molded article 20 formed by the said modeling method becomes high.

When the modeling parts 22a, 22b, 22c, 22d, and 22e constituting the modeled article 20 are all formed, the slurry layers 21a and 2 in the support part removing step (step S15: FIG. 3C).
From the laminated body of 1b, 21c, 21d, and 21e, the support portions 23a, 23c, 23d, and 23
e is removed. The support portions 23a, 23c, 23d, and 23e can be removed by immersing the laminate together with the substrate 11 in a liquid, for example, an organic solvent, or spraying the laminate with an organic solvent at a predetermined pressure. The slurry layers 21a, 21b, 21c
, 21d, 21e, the molding slurry is composed of hydrophobic particles and a hydrophobic liquid, but in the molding slurry, these are only interacting,
When removing the support portions 23a, 23c, 23d, and 23e, instead of the organic solvent,
For example, an aqueous liquid such as water can be used.

As described above, according to the modeling slurry according to the present embodiment and the modeling method using the slurry, the effects listed below can be obtained.
(1) The slurry for modeling was made up of hydrophobic particles and the same type of hydrophobic liquid. Thereby, even when vibration or the like is given to the slurry at the time of forming the shaped article 20, by being held in the structure formed by the interaction between the hydrophobic particles by the interposition of the hydrophobic particle liquid, Scattering of the particles is suppressed.

(2) The hydrophobic particles and the hydrophobic liquid constituting the modeling slurry and the ultraviolet curable resin contained in the UV ink I were made the same system. As a result, the hydrophobic particles are easily taken into the ultraviolet curable resin due to the wettability of the hydrophobic particles with respect to the ultraviolet curable resin, so that the hydrophobic particles become the slurry layers 21a, 21b, 21c, 21d, and 21e. Modeling parts 22a, 22b, 2
2c, 22d, and 22e are difficult to be ejected outside. Therefore, a decrease in the mechanical strength of the model 20 and a shape defect of the model are suppressed.

(3) The hydrophobic liquid which is a constituent element of the molding slurry may contain fluorine. Thereby, liquid repellency can be provided to the said slurry for modeling. Therefore, when forming the modeled object 20, when UV ink I is infiltrated into the modeled part 22a of the slurry layer,
It is possible to suppress the UV ink I from bleeding from the permeation region. Therefore, such UV
It is possible to improve the accuracy related to the shape of the shaped article 20 formed by the particles and the liquid material bound by the ink I.

It should be noted that the above embodiment can be implemented with appropriate modifications as follows.
The binding liquid is not limited to the UV ink I containing an ultraviolet curable resin, but can be embodied in a liquid material containing a thermosetting resin.

-Modeling parts 22a, 22b, 22 of the slurry layers 21a, 21b, 21c, 21d, 21e
After UV ink I was dropped onto c, 22d, and 22e, ultraviolet light L was irradiated. Not limited to this, for example, when the entire layer becomes the modeling portion 22b like the slurry layer 21b,
The forming part 22b may be formed only by the UV ink I without forming the slurry layer 21b.

The sacrificial layer 12 was formed only from slurry. However, the present invention is not limited thereto, and the UV ink I may be dropped on the entire sacrificial layer 12 to form the fixing portion 12a that increases the fixing strength of the model 20 to the substrate. The detail of the modeling method using such a fixing | fixed part 12a is demonstrated below with reference to FIG.4 and FIG.5.

First, a sacrificial layer 12 is formed by applying a slurry on the substrate 11 so as to have a thickness of, for example, 200 μm (FIG. 4A). UV ink I is discretely dropped onto the entire sacrificial layer 12 using the droplet discharge device 31 (FIG. 4B). The fixing portion 12a is formed by curing the UV ink I together with the hydrophobic particles in the region where the UV ink I has permeated. The curing of this UV ink I is
It may be performed immediately after the discrete dropping of the UV ink I shown in FIG.
You may carry out simultaneously with hardening of modeling part 22a of slurry layer 21a formed on. Moreover, the fixing | fixed part 12a should just be formed at the direct bottom of the area | region of the modeling part 22a in the slurry layer 21a formed directly on the sacrificial layer 12. FIG.

Next, after forming a 100 μm slurry layer 21a on the sacrificial layer 12, for example (FIG. 4).
(C)) The UV ink I is dropped onto the modeling portion 22a of the slurry layer 21a by the droplet discharge device 31 (FIG. 4D). And the modeling part 22a is hardened by irradiating the ultraviolet-ray L to the whole slurry layer 21a (FIG. 5 (a)). The formation of the slurry layer, the dropping of the UV ink I, and the curing of the modeling part are repeated, for example, five times (FIG. 5B).

Finally, support portions 23a around the modeling portions 22a, 22b, 22c, 22d, and 22e,
23c, 23d, and 23e are removed (FIG. 5C). At this time, the sacrificial layer 12 is peeled from the substrate 11 including the fixing portion 12a. Of the fixed portions 12a formed on the sacrificial layer 12,
The fixing portion 12a formed immediately below the support portion 23a can be removed by removing the support portion 23a. On the other hand, it is necessary to remove mechanically or chemically about the fixing | fixed part 12a formed directly under the modeling part 22a.

By providing the fixing portion 12a in the sacrificial layer 12 in this manner, the modeling portion 22a that forms the modeling object 20 is more stably supported by the substrate 11.
The sacrificial layer 12 is formed on the substrate 11 prior to the formation of the slurry layers 21a, 21b, 21c, 21d, and 21e constituting the modeled object 20, but the sacrificial layer 12 may not be formed. .

-Modeled object 20 illustrated what was formed by five layers of slurry layers 21a, 21b, 21c, 21d, and 21e. Not only this but the number of the layers which comprise the molded article 20 can be made into one or more arbitrary numbers. Moreover, the shape of the structure formed in each slurry layer is also arbitrary.

-If the shape control of the molded article 20 is possible, the resin granule may have a shape other than a true sphere, for example, an ellipsoidal shape.
-You may make a slurry contain fiber materials, such as an acetate fiber, for example. This
The mechanical strength of the shaped article formed using the slurry can be improved.

-The ultraviolet curable resin contained in the UV ink I may not be the same as the hydrophobic fluid and the hydrophobic liquid.
The hydrophobic particles are not limited to particles made of resin, but may be other hydrophobic particles, for example, particles such as silicon oxide having hydrophobicity on the surface.

UV ink I is applied to the slurry layers 21a, 21b, 21c, 2 by the droplet discharge device 31.
It was made to dripped at 1d and 21e. Not only this but slurry layer 21a, 21b, 21
Any method can be used as long as it allows the UV ink I to penetrate c, 21d, and 21e.

DESCRIPTION OF SYMBOLS 11 ... Board | substrate (base | substrate), 12 ... Sacrificial layer, 12a ... Fixed part, 20 ... Modeling thing, 21a, 21b
, 21c, 21d, 21e ... slurry layer, 22a, 22b, 22c, 22d, 22e ... modeling part, 23a, 23c, 23d, 23e ... support part, 31 ... droplet ejection device, I ... UV ink, L ... ultraviolet light.

Claims (4)

It is a slurry for modeling to form a modeled object with granules,
Hydrophobic granules constituting the shaped article,
A liquid material composed of an acrylate compound containing fluorine constituting the shaped article;
A molding slurry containing a fiber material, wherein the hydrophobic particles include either an acrylic resin or an acrylic silicone resin. In the slurry for modeling according to claim 1,
The liquid material includes any of 2,2,2-trifluoroethyl acrylate, 2,2,3,3-tetrafluoropropyl acrylate, and 1H, 1H, 5H-octafluoropentyl acrylate monomers. Slurry for modeling. A modeling method for forming a modeled object by binding particles through a binding liquid,
Hydrophobic particles selected from acrylic resins or acrylic silicone resins;
A layer forming step of forming on the substrate a layer made of a slurry containing a liquid material made of an acrylate compound containing fluorine;
A binding step of binding the particles and the liquid material by allowing the liquid binding solution to penetrate into a part of the layer and then curing the binding solution;
Removing the region other than the region in which the binding liquid has permeated from the layer by flowing a liquid through the layer containing the cured binding liquid. In the modeling method according to claim 3,
The liquid material includes any of 2,2,2-trifluoroethyl acrylate, 2,2,3,3-tetrafluoropropyl acrylate, and 1H, 1H, 5H-octafluoropentyl acrylate monomers. Modeling method.

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