JP6828351B2 - Composition for manufacturing 3D model, composition set for manufacturing 3D model, manufacturing method for 3D model and 3D model manufacturing device - Google Patents

Description

The present invention relates to a composition for producing a three-dimensional model, a composition set for producing a three-dimensional model, a method for producing a three-dimensional model, and a device for producing a three-dimensional model.

Conventionally, a three-dimensional model has been manufactured using a composition containing a plurality of particles. In particular, in recent years, after dividing the model data of a three-dimensional object into a large number of two-dimensional cross-section layer data (slice data), the cross-section members are sequentially stacked while sequentially modeling the cross-section members corresponding to each two-dimensional cross-section layer data. As a result, the lamination method (three-dimensional modeling method) for forming a three-dimensional modeled object is drawing attention.

The laminating method can be formed immediately as long as there is model data of the three-dimensional model to be modeled, and there is no need to create a mold prior to modeling, so the tertiary method is quick and inexpensive. It is possible to form the original model. Further, since thin plate-shaped cross-sectional members are formed by laminating one layer at a time, for example, even a complicated object having an internal structure can be formed as an integral model without being divided into a plurality of parts. ..

As a method for producing a three-dimensional model, there is a method using a composition containing particles and a solvent for dispersing the particles (see, for example, Patent Document 1).

In such a method, the ease of handling of the material can be made excellent, but it is difficult to sufficiently remove the solvent in the manufacturing process of the three-dimensional model, and the three-dimensional product is manufactured. There was a problem that the reliability of the modeled object was likely to decrease. For example, in the laminating method, when a new layer is laminated, if an excess solvent remains in the layer below it, the layer is likely to be deformed (collapsed, etc.), and the dimensions of the three-dimensional modeled object. It was easy for the accuracy to be low.

Japanese Unexamined Patent Publication No. 2008-184622

An object of the present invention is to provide a composition for producing a three-dimensional model, a composition for producing a three-dimensional model, which can be used for producing a three-dimensional model having excellent productivity and reliability. To provide a manufacturing method for a three-dimensional model that can produce a three-dimensional model with excellent productivity and reliability, and a three-dimensional model with excellent productivity and reliability. It is an object of the present invention to provide a three-dimensional model manufacturing apparatus capable of manufacturing.

Such an object is achieved by the following invention.
The composition for producing a three-dimensional model of the present invention is a composition for producing a three-dimensional model used for producing a three-dimensional model.
With multiple particles,
A solvent that disperses the particles and
Infrared region absorptivity has a wavelength of 20% or more, viewed contains an infrared-absorbing material having a function of absorbing infrared rays,
The content of the infrared absorbing material with respect to 100 parts by volume of the particles is 2 parts by volume or more and 20 parts by volume or less .

Thereby, it is possible to provide a composition for producing a three-dimensional model that can be used for producing a three-dimensional model having excellent productivity and excellent reliability.

In the composition for producing a three-dimensional model of the present invention, the decomposition temperature of the infrared absorbing material is preferably 250 ° C. or higher.

As a result, the productivity of the three-dimensional model can be made more excellent, and the reliability of the three-dimensional model can be made more excellent.

In the composition for producing a three-dimensional model of the present invention, as the infrared absorbing material, one selected from the group consisting of cyanine pigments, phthalocyanine pigments, naphthalocyanine compounds, squalium pigments, quinone compounds, diimmonium compounds and azo compounds. Alternatively, it preferably contains two or more kinds.

As a result, the productivity of the three-dimensional model can be made more excellent, and the reliability of the three-dimensional model can be made more excellent.

In the composition for producing a three-dimensional model of the present invention, the particles preferably contain at least one of a metal material and a ceramic material.

Thereby, for example, the texture (luxury), mechanical strength, durability, etc. of the three-dimensional model can be made more excellent. In addition, in the manufacturing process of the three-dimensional model, the infrared absorbing material is surely removed to more reliably prevent the infrared absorbing material from remaining in the three-dimensional model, and the dimensional accuracy of the three-dimensional model is improved. It can definitely be excellent.

It is preferable that the composition for producing a three-dimensional model of the present invention further contains a binder having a function of temporarily bonding the particles to each other in a state where the solvent is removed.

Thereby, for example, the dimensional accuracy of the three-dimensional model can be improved. Further, for example, the porosity (porosity) in the three-dimensional model, the density of the three-dimensional model, and the like can be preferably adjusted.

In the composition for producing a three-dimensional model of the present invention, the decomposition temperature of the binder is preferably higher than the decomposition temperature of the infrared absorbing material.

As a result, it is possible to more effectively prevent the infrared absorbing material from unintentionally remaining in the finally obtained three-dimensional model. In addition, unintentional deformation in the manufacturing process of the three-dimensional model can be prevented more effectively. Therefore, the reliability of the finally obtained three-dimensional model can be improved.

In the composition for producing a three-dimensional model of the present invention, it is preferable that the binder and the infrared absorbing material are removed after the irradiation of infrared rays in the process of manufacturing the three-dimensional model.
The composition set for producing a three-dimensional model of the present invention is a composition set for producing a three-dimensional model including a plurality of types of compositions.
Zheng Rukoto comprises two or more three-dimensional model composition for the preparation of the present invention is characterized.

Thereby, it is possible to provide a composition set for producing a three-dimensional model which can be used for producing a three-dimensional model having excellent productivity and excellent reliability.

The composition set for producing a three-dimensional model of the present invention is a composition set for producing a three-dimensional model including a plurality of types of compositions.
The composition for producing a three-dimensional model of the present invention is provided as at least one of the above compositions.
At least one composition for forming a body part used for forming a body part of a three-dimensional model is provided, and
During manufacture of the three-dimensional model, characterized in that it comprises at least one support part forming composition used to form the support portion for supporting the part to become the entity portion.
Thereby, it is possible to provide a composition set for producing a three-dimensional model which can be used for producing a three-dimensional model having excellent productivity and excellent reliability.

The method for producing a three-dimensional model of the present invention includes a layer forming step of forming a layer using the composition for producing a three-dimensional model of the present invention, and a solvent removing step of removing the solvent contained in the layer. Repeat a series of steps including
The solvent removing step is characterized by irradiating infrared rays.

As a result, it is possible to provide a method for manufacturing a three-dimensional model that can produce a three-dimensional model with excellent productivity and excellent reliability.

In the method for producing a three-dimensional model of the present invention, it is preferable to have a joining step of performing a joining process for joining the particles after repeating the series of steps.

As a result, the mechanical strength and the like of the three-dimensional model can be made particularly excellent. Further, even if the infrared absorbing material remains in the process up to that point, it is possible to prevent the infrared absorbing material from unintentionally remaining in the three-dimensional model, and the reliability of the three-dimensional model can be prevented. It can be highly sexual. In addition, the productivity of the three-dimensional model can be made more excellent.

The three-dimensional model manufacturing apparatus of the present invention is a three-dimensional model manufacturing apparatus that manufactures a three-dimensional model by repeatedly forming layers.
A nozzle for discharging the composition for producing a three-dimensional model of the present invention,
It is characterized by including an infrared irradiation means for irradiating infrared rays.

Thereby, it is possible to provide a three-dimensional model manufacturing apparatus capable of manufacturing a three-dimensional model having excellent productivity and excellent reliability.

It is a vertical cross-sectional view which shows typically the process (the first pattern forming process) of the manufacturing method of the three-dimensional model | thing of the preferred embodiment of this invention. It is a vertical cross-sectional view which shows typically the process (the second pattern forming process) of the manufacturing method of the three-dimensional model | thing of the preferred embodiment of this invention. It is a vertical cross-sectional view which shows typically the process (solvent removal process) of the manufacturing method of the three-dimensional model | thing of the preferable embodiment of this invention. It is a vertical cross-sectional view which shows typically the process (the first pattern forming process) of the manufacturing method of the three-dimensional model | thing of the preferred embodiment of this invention. It is a vertical cross-sectional view which shows typically the process (the second pattern forming process) of the manufacturing method of the three-dimensional model | thing of the preferred embodiment of this invention. It is a vertical cross-sectional view which shows typically the process (solvent removal process) of the manufacturing method of the three-dimensional model | thing of the preferable embodiment of this invention. It is a vertical cross-sectional view which shows typically the process of the manufacturing method of the three-dimensional model | manufacturing | manufacturing thing of a preferable embodiment of this invention. It is a vertical cross-sectional view which shows typically the process (solvent degreasing process) of the manufacturing method of the three-dimensional model | thing of the preferable embodiment of this invention. It is a vertical cross-sectional view which shows typically the process (support part removal process) of the manufacturing method of the three-dimensional model | thing of the preferable embodiment of this invention. It is a vertical cross-sectional view which shows typically the process (joining process) of the manufacturing method (joining process) of the three-dimensional model | manufacturing | manufacturing thing of a preferable embodiment of this invention. It is a flowchart which shows the manufacturing method of the 3D model | thing of the preferable embodiment of this invention. It is sectional drawing which shows typically the preferable embodiment of the three-dimensional model manufacturing apparatus.

Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings.
《Manufacturing method of 3D model》
First, a method for manufacturing a three-dimensional model of the present invention will be described.

1 to 10 are vertical cross-sectional views schematically showing a process of a method for manufacturing a three-dimensional model according to a preferred embodiment of the present invention. FIG. 11 is a flowchart showing a method for manufacturing a three-dimensional model according to a preferred embodiment of the present invention.

In the method for producing the three-dimensional model 10 of the present embodiment, the layer forming step of forming the layer 1 using the three-dimensional model manufacturing composition (layer forming composition) 1'(FIGS. 1, FIG. 2, FIG. 4. A series of steps including a solvent removing step of removing the solvent contained in the layer 1 (see FIGS. 3 and 6) is repeated to obtain a laminate 50 (see FIG. 7), and then. , A joining step (see FIG. 10) is performed on the laminated body 50 to join the particles contained in the laminated body 50 (layer 1).

In particular, in the present embodiment, in the layer forming step, as the composition 1'for producing the three-dimensional model, the composition 1B'for forming the substance used for forming the substance part (joint portion) 2 of the three-dimensional model 10 In addition, the support portion forming composition 1A'used for forming the support portion (support portion, support material) 5 for supporting the portion to be the body portion 2 is used, and the support portion forming composition 1A'is used. 1st pattern forming step (support part pattern forming step) for forming the first pattern (support part pattern) 1A and the second pattern by discharging the substance part forming composition 1B'. (Pattern for body part) It has a second pattern forming step (pattern forming step for body part) for forming 1B.

Then, at least one of the body portion forming composition 1B'and the support portion forming composition 1A' as the three-dimensional model manufacturing composition (layer forming composition) 1'is a plurality of particles (mainly). Material particles), a solvent that disperses the particles, and an infrared absorbing material having a function of absorbing infrared rays.

Hereinafter, each step will be described in detail.
≪First pattern forming process≫

In the first pattern forming step, the support portion forming composition 1A'is discharged to form the first pattern 1A.

As described above, by forming the first pattern 1A by discharging the support portion forming composition 1A', even a pattern having a fine shape or a complicated shape can be suitably formed.

The method of discharging the support portion forming composition 1A'is not particularly limited, and for example, it can be performed using an inkjet device or the like, but it is preferably performed using a dispenser.

By discharging the support portion forming composition 1A'using the dispenser in this way, even a highly viscous support portion forming composition 1A'can be suitably supplied (discharged) and supported. It is possible to more effectively prevent sagging or the like of the support portion forming composition 1A'after the portion forming composition 1A'contacts the target site. As a result, the dimensional accuracy of the finally obtained three-dimensional model 10 can be made more excellent. Further, by using the high-viscosity support portion forming composition 1A', the layer 1 having a relatively large thickness can be easily formed, and the productivity of the three-dimensional model 10 can be further improved. Can be done.

The viscosity of the support portion forming composition 1A'in this step is preferably 100 mPa · s or more and 10000 mPa · s or less, more preferably 500 mPa · s or more and 100,000 mPa · s or less, and 1000 mPa · s or more and 20000 mPa · s. It is more preferably s or less.

Thereby, for example, the discharge stability of the support portion forming composition 1A'can be made more excellent, and it is suitable for forming the layer 1 having an appropriate thickness, and the production of the three-dimensional modeled product 10 can be achieved. The sex can be made better. Further, it is more effectively prevented that the support portion forming composition 1A'in contact with the adherend is excessively wetted and spread, and the dimensional accuracy of the finally obtained three-dimensional model 10 is further improved. be able to.

In the present specification, the viscosity means a value measured using a rheometer under the condition of shear rate: 10 [s ^-1 ] unless a specific condition is specified.

In this step, the support portion forming composition 1A'may be discharged in a continuous form or as a plurality of droplets, but it is preferably discharged as a plurality of droplets.

Thereby, for example, it is possible to more preferably cope with the production of the three-dimensional modeled object 10 having a fine structure, and the dimensional accuracy of the three-dimensional modeled object 10 can be made more excellent.

When the support portion forming composition 1A'is discharged as a plurality of droplets in this step, the volume per droplet of the discharged droplets is preferably 1 pL or more and 2000 pL or less, and is preferably 10 pL or more and 500 pL or less. Is more preferable.

Thereby, for example, it is possible to more preferably cope with the production of the three-dimensional model 10 having a fine structure, the dimensional accuracy of the three-dimensional model 10 can be improved, and the three-dimensional structure can be improved. The productivity of the modeled object 10 can be made more excellent.

In the production of the three-dimensional model 10, a plurality of types of compositions may be used as the support portion forming composition 1A'.
The support portion forming composition 1A'will be described in detail later.

≪Second pattern forming process≫
In the second pattern forming step, the body portion forming composition 1B'is discharged to form the second pattern 1B.

As described above, by forming the second pattern 1B by discharging the composition 1B'for forming the substance portion, even a pattern having a fine shape or a complicated shape can be suitably formed.

In particular, in the present embodiment, the substance portion forming composition 1B'is discharged into the region surrounded by the first pattern 1A so that the entire periphery of the second pattern 1B comes into contact with the first pattern 1A. To do.

As a result, the dimensional accuracy of the finally obtained three-dimensional model 10 can be made more excellent.

The method for discharging the composition 1B'for forming the substance portion is not particularly limited, and for example, it can be performed using an inkjet device or the like, but it is preferably performed using a dispenser.

By discharging the body portion forming composition 1B'using the dispenser in this way, even a highly viscous body portion forming composition 1B'can be suitably supplied (discharged). It is possible to more effectively prevent sagging or the like of the substance portion-forming composition 1B'after the portion-forming composition 1B'contacts the target site. As a result, the dimensional accuracy of the finally obtained three-dimensional model 10 can be made more excellent. Further, by using the high-viscosity substance portion forming composition 1B', the layer 1 having a relatively large thickness can be easily formed, and the productivity of the three-dimensional model 10 can be further improved. Can be done.

The body portion forming composition 1B'may be, for example, a paste.
The viscosity of the body portion forming composition 1B'in this step is preferably 100 mPa · s or more and 10000 mPa · s or less, more preferably 500 mPa · s or more and 100,000 mPa · s or less, and 1000 mPa · s or more and 20000 mPa · s. It is more preferably s or less.

As a result, for example, the discharge stability of the body portion forming composition 1B'can be made more excellent, and it is suitable for forming the layer 1 having an appropriate thickness, and the production of the three-dimensional model 10 is produced. The sex can be made better. In addition, the composition 1B'for forming the body portion in contact with the adherend is more effectively prevented from being excessively wetted and spread, and the dimensional accuracy of the finally obtained three-dimensional model 10 is further improved. be able to.

In this step, the composition for forming the substance portion 1B'may be discharged in a continuous form or as a plurality of droplets, but it is preferably discharged as a plurality of droplets.

Thereby, for example, it is possible to more preferably cope with the production of the three-dimensional modeled object 10 having a fine structure, and the dimensional accuracy of the three-dimensional modeled object 10 can be made more excellent.

When the composition for forming a substance portion 1B'is discharged as a plurality of droplets in this step, the volume per droplet of the discharged droplets is preferably 1 pL or more and 2000 pL or less, and is preferably 10 pL or more and 500 pL or less. Is more preferable.

Thereby, for example, it is possible to more preferably cope with the production of the three-dimensional model 10 having a fine structure, the dimensional accuracy of the three-dimensional model 10 can be improved, and the three-dimensional structure can be improved. The productivity of the modeled object 10 can be made more excellent.

In the production of the three-dimensional model 10, a plurality of types of compositions may be used as the composition for forming the body portion 1B'.

Thereby, for example, the materials can be combined according to the characteristics required for each part of the three-dimensional modeled object 10, and the characteristics (appearance, functionality (for example, elasticity, toughness, heat resistance) of the three-dimensional modeled object 10 as a whole can be combined. (Including properties, corrosion resistance, etc.), etc.) can be made more excellent.
The composition 1B'for forming the substance portion will be described in detail later.

By performing the first pattern forming step and the second pattern forming step as described above, the layer 1 having the first pattern 1A and the second pattern 1B is formed. In other words, the layer forming step includes a first pattern forming step and a second pattern forming step.

The thickness of each layer 1 formed by using the support portion forming composition 1A'and the body portion forming composition 1B' is not particularly limited, but is preferably 10 μm or more and 500 μm or less, and 20 μm or more and 250 μm or less. Is more preferable.

As a result, the productivity of the three-dimensional model 10 can be made excellent, and the dimensional accuracy of the three-dimensional model 10 can be made more excellent. Further, when the thickness of the layer 1 is within the above range, the efficiency of removing the solvent by irradiation with infrared rays, which will be described in detail later, can be made more excellent.

≪Solvent removal process≫
In the solvent removing step, the solvent contained in the layer 1 is removed.
In particular, in this step, the layer 1 is irradiated with infrared rays E. As described above, at least one of the body portion forming composition 1B'and the support portion forming composition 1A' as the three-dimensional model manufacturing composition (layer forming composition) 1'is combined with the solvent. It contains an infrared absorbing material.

Therefore, in this step, by irradiating the infrared ray E, the energy of the infrared ray E irradiated to the infrared ray absorbing material contained in the layer 1 is absorbed, the infrared ray absorbing material generates heat, and the entire layer 1 is heated. it can. In particular, by using the infrared ray E, not only the vicinity of the outer surface of the layer 1 but also the inside of the layer 1 can be efficiently heated, and the temperature of the entire layer 1 can be raised. As a result, volatilization of the solvent contained in the layer 1 is promoted, and the solvent removal efficiency of the layer 1 as a whole can be made excellent. As a result, the productivity of the three-dimensional model 10 can be made excellent.

Further, since it is possible to effectively prevent the solvent from remaining unintentionally in the layer 1, it is possible to effectively prevent the unintentional deformation (collapse, etc.) of the layer 1 in the manufacturing process of the three-dimensional model 10. It is also possible to prevent unintentional deformation due to rapid volatilization of the solvent in the degreasing step and the sintering step described later. In addition, it is possible to effectively prevent the solvent from unintentionally remaining in the finally obtained three-dimensional model 10.

From the above, the finally obtained three-dimensional model 10 can be made to have excellent dimensional accuracy and reliability.

In the present invention, infrared rays are a concept including near infrared rays, middle infrared rays and far infrared rays, and the wavelength region thereof is 0.7 μm or more and 1000 μm or less.

The light irradiated in this step may contain infrared rays as described above, but it is preferable that the light has a maximum value in the infrared region in the spectrum.

The maximum value in the infrared region varies depending on the composition of the infrared absorbing material and the like, but for example, when an infrared absorbing material exemplified as a preferable material later is used, it is preferably contained in a region of 0.70 μm or more and 10 μm or less, and is 0. It is more preferably contained in a region of .72 μm or more and 6 μm or less, and further preferably contained in a region of 0.74 μm or more and 4 μm or less.

As a result, the infrared rays E irradiated to the infrared absorbing material can be absorbed more efficiently, and the above-mentioned effects can be exhibited more remarkably. Further, a light source having a maximum value in the infrared region within the above range is relatively inexpensive and easily available. Therefore, it is advantageous from the viewpoint of reducing the manufacturing cost of the three-dimensional modeled object 10, stable manufacturing of the three-dimensional modeled object 10, and the like.

The energy per unit area of the infrared ray E irradiating the layer 1 in this step (energy per unit area in the region where the solvent should be removed) depends on the thickness of the layer 1 and the constituent materials, but is 1 mJ / cm ² or more. is preferably at 10000 mJ / cm ² or less, more preferably 10 mJ / cm ² or more 5000 mJ / cm ² or less.

As a result, the solvent removing step can be completed in a shorter time while reducing the amount of the solvent remaining in the layer 1 after the solvent removing step, and the productivity of the three-dimensional model 10 is further improved. Can be. Further, the amount of energy required for removing the solvent per unit amount can be made smaller, which is preferable from the viewpoint of energy efficiency. Further, as the infrared light source, a relatively inexpensive and easily available light source can be used. Therefore, it is preferable from the viewpoint of reducing the production cost of the three-dimensional model 10 and stable supply.

In this step, as the treatment for removing the solvent, a treatment other than infrared irradiation (for example, a heat treatment other than infrared irradiation, a decompression treatment, etc.) may be combined.

As a result, the efficiency of solvent removal can be made more excellent, and the productivity of the three-dimensional model 10 can be made more excellent. Further, even when the thickness of the layer 1 is relatively large, the amount of the solvent contained in the layer 1 after the solvent removing step can be easily reduced.

Further, in the present embodiment, at least one of the composition for forming the substance portion 1B'and the composition for forming the support portion 1A' contains a binder. Therefore, by removing the solvent in this step, the binder can temporarily bond the particles to each other, and the stability of the shape of the layer 1 can be improved.

In this step, it is not necessary to completely remove the solvent contained in the layer 1. Even in such a case, the infrared irradiation treatment for a relatively short time can sufficiently reduce the content of the solvent in the layer 1 and sufficiently prevent the occurrence of harmful effects due to the inclusion of the solvent as described above. ..

The content of the solvent in the layer 1 after this step is preferably 0.1% by mass or more and 25% by mass or less, and more preferably 0.5% by mass or more and 20% by mass or less.

As a result, the productivity of the three-dimensional model 10 can be made more excellent while sufficiently preventing the occurrence of harmful effects due to the residual solvent remaining in the layer 1.

In the production of the three-dimensional model 10, a series of steps including a layer forming step and a solvent removing step are repeated a predetermined number of times to obtain a laminated body 50 in which a plurality of layers 1 are laminated.

That is, it is determined whether or not a new layer 1 should be formed on the already formed layer 1, and if there is a layer 1 to be formed, a new layer 1 is formed, and there is no layer 1 to be formed. The step 50 will be described in detail later.

≪Solvent degreasing process≫
In the present embodiment, with respect to the laminate 50 obtained by repeating a series of steps including the layer forming step (first pattern forming step, second pattern forming step) and the solvent removing step as described above. It has a degreasing step of performing a degreasing treatment (see FIG. 8). As a result, the degreased body 70 is obtained. By obtaining such a degreased body 70, the subsequent sintering step (bonding step) can be performed more preferably.

Further, since the laminate 50 used in this step has a sufficiently low solvent content due to the infrared irradiation treatment described above, it is unintentionally deformed in the degreasing step (for example, rapid volatilization of the solvent). Deformation associated with) is effectively prevented.

Further, for example, by performing a degreasing step, the infrared absorbing material can be efficiently removed, and the infrared absorbing material and its decomposition products are unwillingly left in the finally obtained three-dimensional model 10. It can be prevented more effectively.

In the present specification, the degreased body is a product obtained by subjecting a molded body (laminated body 50) molded into a predetermined shape to a treatment (defatting treatment) for removing a binder. To say. In the degreasing treatment, at least a part of the binder contained in the molded body (laminated body 50) may be removed, and a part of the binder may remain in the degreased body.

The degreasing treatment may be carried out by any method as long as it is a method for removing the binder contained in the laminate 50, but in addition to an oxidizing atmosphere such as oxygen and nitric acid gas, in a non-oxidizing atmosphere, for example, vacuum or reduced pressure. It is performed by performing heat treatment under a condition (for example, 1.33 × 10 ^-4 Pa or more and 13.3 Pa or less) or in a gas such as nitrogen gas or argon gas.

The treatment temperature in the degreasing step (heat treatment) is not particularly limited, but is preferably 100 ° C. or higher and 750 ° C. or lower, and more preferably 150 ° C. or higher and 600 ° C. or lower.

As a result, unintentional deformation of the laminated body 50 and the degreasing body 70 in the degreasing step can be prevented more reliably, and the degreasing treatment can proceed more efficiently. As a result, the three-dimensional model 10 having better dimensional accuracy can be manufactured with better productivity.

Further, for example, the infrared absorbing material can be removed more efficiently, and the infrared absorbing material and its decomposition products are more effectively prevented from remaining unintentionally in the finally obtained three-dimensional model 10. be able to.

The treatment time (heat treatment time) in the degreasing step (heat treatment) is preferably 0.5 hours or more and 20 hours or less, and more preferably 1 hour or more and 10 hours or less.

As a result, the productivity of the three-dimensional model 10 can be made more excellent. Further, the residual ratio of the binder in the degreased body 70 can be made sufficiently low, and the reliability of the finally obtained three-dimensional model 10 can be made more excellent.

Further, degreasing by such heat treatment may be divided into a plurality of steps (steps) for various purposes (for example, for the purpose of shortening the degreasing time). In this case, for example, a method of degreasing the first half at a low temperature and the second half at a high temperature, a method of repeating low temperature and high temperature, and the like can be mentioned.

≪Support part removal process≫
Then, after performing the degreasing step, the support portion 5 is removed. As a result, the degreased body 70 is taken out (see FIG. 9).

Specific methods of this step include, for example, a method of removing the support portion 5 with a brush or the like, a method of removing the support portion 5 by suction, a method of blowing a gas such as air, or a method of applying a liquid such as water ( For example, a method of immersing the composite of the support portion 5 and the degreasing body 70 obtained as described above in the liquid, a method of spraying the liquid, etc.), a method of applying vibration such as ultrasonic vibration, and the like can be mentioned. .. In addition, two or more methods selected from these can be combined.

Further, the support unit 5 may be removed by using, for example, a liquid that dissolves at least a part of the support unit 5, or may be removed by being decomposed by a chemical reaction. May be good.

≪Sintering process (joining process)≫
In the present embodiment, there is a sintering step as a joining step of performing a joining process for joining the particles (main material particles) contained in the degreasing body 70 obtained in the degreasing step.

As a result, the particles contained in the degreased body 70 are joined (sintered) to form the joined portion (substance portion) 2, and the three-dimensional model 10 as the sintered body is obtained.

By forming the joint portion 2 in this way, the three-dimensional model 10 is formed by firmly joining the particles, and the mechanical strength of the three-dimensional model 10 is particularly excellent. be able to.

Further, even when the infrared absorbing material remains up to the above-mentioned step, the infrared absorbing material can be reliably removed by the joining treatment (sintering treatment). As a result, it is possible to prevent the infrared absorbing material from unintentionally remaining in the three-dimensional model 10, and it is possible to improve the reliability of the three-dimensional model 10.

In particular, in the present embodiment, the joining treatment is applied to a laminated body (defatted body 70) having a plurality of layers 1.
As a result, the productivity of the three-dimensional model 10 can be made more excellent.

The sintering step is performed by heat treatment.
The heating in the sintering step is preferably performed at a temperature equal to or lower than the melting point of the constituent material of the particles constituting the degreasing body 70.

As a result, the particles can be joined more efficiently without breaking the shape of the laminated body.

The heat treatment in the sintering step is usually performed at a higher temperature than the heat treatment in the degreasing step.
When the melting point of the constituent material of the particles is Tm [° C.], the heating temperature in the sintering step is preferably (Tm-200) ° C. or higher and (Tm-50) ° C. or lower, preferably (Tm-150) ° C. It is more preferably more than (Tm-70) ° C. or lower.

As a result, the particles can be joined more efficiently with a shorter heat treatment, and the unintentional deformation of the degreased body 70 in the sintering step can be prevented more effectively. The dimensional accuracy of 10 can be made more excellent.

When the particles contain a plurality of components, the melting point of the component having the highest content can be adopted as the melting point.

The heating time in the sintering step is not particularly limited, but is preferably 30 minutes or more and 5 hours or less, and more preferably 1 hour or more and 3 hours or less.

As a result, it is possible to more effectively prevent unintentional deformation in this process while sufficiently advancing the bonding between particles, and to achieve both mechanical strength and dimensional accuracy of the three-dimensional model 10 at a higher level. At the same time, the productivity of the three-dimensional model 10 can be made more excellent.

The atmosphere during the sintering treatment is not particularly limited, but is in a non-oxidizing atmosphere, for example, under a vacuum or reduced pressure state (for example, 1.33 × 10 ^-4 Pa or more and 133 Pa or less), or in a nitrogen gas, argon gas, or the like. It can be an inert gas, and if necessary, a reducing gas atmosphere such as hydrogen.

Further, the sintering step may be performed in two steps or more. As a result, the efficiency of sintering is improved, and sintering (baking) can be performed in a shorter processing time.

Further, the sintering step may be performed continuously with the above-mentioned degreasing step.
As a result, the degreasing step can also serve as a pre-sintering step, and the degreasing body 70 can be preheated to more reliably sinter the degreasing body 70.

Further, such a sintering step may be divided into a plurality of steps (steps) for various purposes (for example, for the purpose of shortening the firing time). In this case, for example, a method of firing the first half at a low temperature and the second half at a high temperature, a method of repeating low temperature and high temperature, and the like can be mentioned.

According to the manufacturing method of the present invention as described above, it is possible to efficiently manufacture a three-dimensional model having excellent dimensional accuracy.

A flowchart of the method for manufacturing the three-dimensional model as described above is shown in FIG.

<< Composition for manufacturing three-dimensional model >>
Next, the composition for producing a three-dimensional model of the present invention will be described.

When a plurality of types of three-dimensional model manufacturing compositions are used for manufacturing a three-dimensional model, at least one three-dimensional model manufacturing composition is the three-dimensional model manufacturing composition of the present invention (plural). A composition containing the above particles, a solvent for dispersing the particles, and an infrared absorbing material having a function of absorbing infrared rays).

In the present embodiment, the composition for forming the body portion 1B'and the composition for forming the support portion 1A'are used as the composition for producing the three-dimensional modeled object.

≪Composition for forming the body part≫
First, the substance portion forming composition 1B'as a composition for producing a three-dimensional modeled object used for producing the three-dimensional modeled object 10 will be described.

As long as the composition 1B'for forming the body portion can be used for the formation of the body portion 2 (formation of the second pattern 1B), its constituent components and the like are not particularly limited, but a plurality of particles (mainly). It is preferable that it contains (material particles) and a solvent that disperses the particles, and it is more preferable that it contains a binder. Further, the composition 1B'for forming a substance portion preferably contains an infrared absorbing material.

In the following description, a case where the composition for forming a substance portion 1B'contains a plurality of particles, a solvent, a binder and an infrared absorbing material will be typically described.

(particle)
Since the body portion forming composition 1B'contains a plurality of particles, the range of selection of the constituent materials of the three-dimensional model 10 can be widened, and the tertiary having desired physical properties, texture, etc. can be selected. The original model 10 can be preferably obtained. For example, when a three-dimensional model is produced using a material dissolved in a solvent, there are restrictions on the materials that can be used, but such restrictions are made by using the composition 1B'for forming a substance portion containing particles. Can be resolved.

Examples of the constituent material of the particles contained in the composition for forming the body portion 1B' include metal materials, metal compounds (ceramics and the like), resin materials, pigments and the like.

The body portion forming composition 1B'preferably contains particles composed of a material containing at least one of a metal material and a ceramic material.

As a result, for example, the texture (luxury), mechanical strength, durability, and the like of the three-dimensional model 10 can be made more excellent. In addition, these materials generally have sufficient shape stability at the decomposition temperature of the infrared absorbing material as described in detail later. Therefore, in the manufacturing process of the three-dimensional model 10, the infrared absorbing material is surely removed, and the infrared absorbing material is more reliably prevented from remaining in the three-dimensional model 10, and the dimensions of the three-dimensional model 10 are increased. The accuracy can be improved more reliably.

In particular, when the particles are made of a material containing a metal material, the three-dimensional model 10 can be particularly excellent in terms of luxury, weight, mechanical strength, toughness, and the like. In addition, since heat transfer proceeds efficiently when energy is applied for joining particles, the productivity of the three-dimensional model 10 is particularly excellent, and unintentional temperature variation at each part is caused. The occurrence can be prevented more effectively, and the reliability of the three-dimensional model 10 can be made particularly excellent.

Examples of the metal material constituting the particles include magnesium, iron, copper, cobalt, titanium, chromium, nickel and alloys containing at least one of these (for example, malaging steel, stainless steel, cobalt chromium molybdenum, titanium alloy). , Nickel-based alloys, aluminum alloys, etc.) and the like.

Examples of the metal compound constituting the particles include various metal oxides such as silica, alumina, titanium oxide, zinc oxide, zircon oxide, tin oxide, magnesium oxide and potassium titanate; magnesium hydroxide, aluminum hydroxide and hydroxide. Various metal hydroxides such as calcium; various metal nitrides such as silicon nitride, titanium nitride and aluminum nitride; various metal carbides such as silicon carbide and titanium carbide; various metal sulfides such as zinc sulfide; calcium carbonate, magnesium carbonate and the like Various metal carbonates; various metal sulfates such as calcium sulfate and magnesium sulfate; silicates of various metals such as calcium silicate and magnesium silicate; phosphates of various metals such as calcium phosphate; aluminum borate, Examples thereof include borates of various metals such as magnesium borate and composites thereof.

Examples of the resin material constituting the particles include polybutylene terephthalate, polyethylene terephthalate, polypropylene, polystyrene, syndiotactic polystyrene, polyacetal, modified polyphenylene ether, polyether ether ketone, polycarbonate, and acrylonitrile-butadiene-styrene copolymer (acrylonitrile-butadiene-styrene copolymer). ABS resin), polyether nitrile, polyamide (nylon, etc.), polyarylate, polyamideimide, polyetherimide, polyimide, liquid crystal polymer, polysulfone, polyether sulfone, polyphenylene sulfide, fluororesin and the like.

The shape of the particles is not particularly limited, and may be any shape such as spherical, spindle-shaped, needle-shaped, tubular, scaly, etc., and may be irregular, but spherical. Is preferable.

The average particle size of the particles is not particularly limited, but is preferably 0.1 μm or more and 20 μm or less, and more preferably 0.2 μm or more and 10 μm or less.

As a result, the fluidity of the body portion forming composition 1B'can be made more suitable, the second pattern forming step can be performed more smoothly, and the particles can be joined in the joining step more smoothly. It can be preferably performed. Further, for example, the solvent and the binder contained in the layer 1 can be efficiently removed, and the constituent materials other than the particles are unwillingly left in the final three-dimensional model 10. It can be effectively prevented. Therefore, it is possible to improve the productivity and mechanical strength of the three-dimensional model 10 to be manufactured while making the productivity of the three-dimensional model 10 more excellent. It is possible to more effectively prevent the occurrence of undesired unevenness in the three-dimensional model 10 and improve the dimensional accuracy of the three-dimensional model 10.

In the present invention, the average particle size means a volume-based average particle size. For example, a dispersion liquid obtained by adding a sample to methanol and dispersing it with an ultrasonic disperser for 3 minutes is a Coulter counter particle size distribution measuring device ( It can be obtained by measuring with a COULTER ELECTRONICS INS TA-II type) using an aperture of 50 μm.

The Dmax of the particles is preferably 0.2 μm or more and 25 μm or less, and more preferably 0.4 μm or more and 15 μm or less.

As a result, the fluidity of the body portion forming composition 1B'can be made more suitable, the second pattern forming step can be performed more smoothly, and the particles can be joined in the joining step more smoothly. It can be preferably performed. As a result, the productivity of the three-dimensional model 10 can be made more excellent, and the mechanical strength of the manufactured three-dimensional model 10 can be made more excellent, and the three-dimensional model 10 to be manufactured can be made more excellent. It is possible to more effectively prevent the occurrence of unintentional unevenness in the above, and to improve the dimensional accuracy of the three-dimensional modeled object 10.

The content of the particles in the body portion forming composition 1B'is preferably 30% by mass or more and 93% by mass or less, and more preferably 35% by mass or more and 88% by mass or less.

As a result, the ease of handling of the body portion forming composition 1B'can be improved, and the amount of components removed in the manufacturing process of the three-dimensional model 10 can be reduced. It is particularly advantageous from the viewpoints of productivity, production cost, resource saving, etc. of the three-dimensional model 10. In addition, the dimensional accuracy of the finally obtained three-dimensional model 10 can be made more excellent.

The particles are made of a material that undergoes a chemical reaction (for example, an oxidation reaction) in the manufacturing process of the three-dimensional model 10 (for example, a joining step), and the composition 1B'for forming a substance portion is formed. The composition of the particles contained therein and the constituent material of the final three-dimensional model 10 may be different.
Further, the composition 1B'for forming a substance portion may contain two or more kinds of particles.

(solvent)
Since the body portion forming composition 1B'contains a solvent, particles can be suitably dispersed in the body portion forming composition 1B', and the discharge of the body portion forming composition 1B' by a dispenser or the like is stable. Can be done

The solvent is particularly limited as long as it has a function of dispersing particles (function as a dispersion medium) in the composition for forming a body portion 1B'and can be removed by infrared irradiation (for example, removal by volatilization). However, for example, water; (poly) alkylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether; ethyl acetate, n-propyl acetate, iso acetate. Acetate esters such as -propyl, n-butyl acetate, iso-butyl acetate; carbitols such as carbitol and ester compounds thereof (eg, carbitol acetate, etc.); cellosolve and ester compounds thereof (eg, cellosolob acetate). Etc.) and other cellosolves; aromatic hydrocarbons such as benzene, toluene, xylene; methyl ethyl ketone, acetone, methyl isobutyl ketone, ethyl-n-butyl ketone, diisopropyl ketone, acetylacetone and other ketones; ethanol, propanol, butanol, etc. Alcohols; sulfoxide solvents such as dimethyl sulfoxide and diethyl sulfoxide; pyridine solvents such as pyridine, picolin and 2,6-rutidine; ionic liquids such as tetraalkylammonium acetate (eg, tetrabutylammonium acetate) and the like. , One kind or two or more kinds selected from these can be used in combination.

When the body portion forming composition 1B'contains particles composed of a metal material, it is preferable to use an aprotic solvent as the solvent. As a result, it is possible to effectively prevent an undesired oxidation reaction or the like of the constituent material of the particles.

The content of the solvent in the body portion forming composition 1B'is preferably 5% by mass or more and 68% by mass or less, and more preferably 8% by mass or more and 60% by mass or less.

As a result, the ease of handling of the body portion forming composition 1B'can be improved, and the amount of components removed in the manufacturing process of the three-dimensional model 10 can be reduced. It is particularly advantageous from the viewpoints of productivity, production cost, resource saving, etc. of the three-dimensional model 10. In addition, the dimensional accuracy of the finally obtained three-dimensional model 10 can be made more excellent.

(Infrared absorbing material)
The infrared absorbing material has a function of absorbing infrared rays and generates heat (heats) by absorbing infrared rays.

By including such an infrared absorbing material, the composition 1B'for forming a substance portion as a composition for producing a three-dimensional model can be heated (heated) when irradiated with infrared rays, and the solvent can be made efficient. Can be removed well. As a result, the productivity of the three-dimensional model 10 can be made excellent.

Further, since it is possible to effectively prevent the solvent from remaining unintentionally, it is possible to effectively prevent unintentional deformation (collapse, etc.) of the layer 1 in the manufacturing process of the three-dimensional modeled object 10. .. In addition, it is possible to effectively prevent the solvent from unintentionally remaining in the three-dimensional model 10.

From the above, the three-dimensional model 10 can be made to have excellent dimensional accuracy and reliability.

The infrared absorbing material may be a material that generates heat (heats up) by absorbing infrared rays, but it is preferable that the infrared absorbing material has a wavelength having an absorption rate of 20% or more in the infrared region, and the absorption rate is in the infrared region. It is more preferable that it has a wavelength of 30% or more, and it is further preferable that it has a wavelength of 40% or more in the infrared region.

As a result, infrared energy can be converted into heat energy more efficiently, and the solvent can be heated and removed more efficiently. Therefore, the productivity of the three-dimensional model 10 can be made more excellent, and the reliability of the three-dimensional model 10 can be made more excellent.

The infrared absorbing material preferably has a decomposition temperature of 250 ° C. or higher, more preferably a decomposition temperature of 280 ° C. or higher, and further preferably a decomposition temperature of 300 ° C. or higher and 600 ° C. or lower. preferable.

In general, the boiling point of a solvent is well below that temperature. Therefore, even when the infrared irradiation intensity is relatively strong, it is effectively prevented that the temperature of the infrared absorbing material becomes higher than the temperature due to the heat of vaporization of the solvent. Therefore, in the solvent removing step, it is more reliably prevented that the infrared absorbing material is unintentionally decomposed and the efficiency of solvent removal is lowered. As a result, the solvent removing step can be advanced more efficiently, and the productivity of the three-dimensional model 10 can be made more excellent. In addition, it is possible to more effectively prevent the solvent from remaining unintentionally, and the reliability of the finally obtained three-dimensional model 10 can be made more excellent.

The infrared absorbing material preferably has an absorption maximum in a region of 0.70 μm or more and 10 μm or less, and has an absorption maximum in a region of 0.72 μm or more and 6 μm or less in the absorption spectrum in the infrared region. Is more preferable, and it is more preferable that the absorption maximum is in the region of 0.74 μm or more and 4 μm or less.

As a result, the efficiency of removing the solvent by irradiation with infrared rays can be made more excellent. Further, a light source having a maximum value of light emission in the wavelength region as described above is relatively inexpensive and easily available. Therefore, it is advantageous from the viewpoint of reducing the manufacturing cost of the three-dimensional modeled object 10, stable manufacturing of the three-dimensional modeled object 10, and the like.

In the present invention, components other than the infrared absorbing material (for example, particles, binder, solvent, etc.) may also absorb infrared rays, but the infrared absorbing material refers to the components in the infrared region. Those having different absorption spectra (particularly those having different wavelengths of absorption maximum values) are preferable. As a result, when a light source having a predetermined spectrum (a light source other than single-wavelength light) is used, the infrared absorption efficiency as a whole can be made more excellent, and the solvent removal efficiency is particularly excellent. Can be.

Examples of the infrared absorbing material include cyanine pigments, phthalocyanine pigments, naphthalocyanine compounds, squalium pigments, quinone compounds, diynemonium compounds, azo compounds, nickel dithiolene complexes, etc. Among them, cyanine pigments, phthalocyanine pigments, and na. Phthalocyanine compounds, squalium dyes, quinone compounds, diimmonium compounds, and azo compounds are preferable, and one or more of these can be used.

As a result, the infrared energy can be converted into heat energy more efficiently, and unintentional deterioration, decomposition, etc. of the infrared absorbing material can be prevented more effectively. As a result, the solvent removing step can be advanced more efficiently, and the productivity of the three-dimensional model 10 can be made more excellent. In addition, it is possible to more effectively prevent the solvent from remaining unintentionally, and the reliability of the finally obtained three-dimensional model 10 can be made more excellent.

Further, when the particles are made of a metal material and the infrared absorbing material contains a metal atom such as Cu, the metal atom is common to the metal atom constituting the particle. It is preferable to have it.

Thereby, even when the decomposition product of the infrared absorbing material is contained in the finally obtained three-dimensional modeled object 10, it is possible to more effectively prevent the deterioration of the quality of the three-dimensional modeled object 10.

The infrared absorbing material may be contained in any form in the composition for forming the body portion 1B', but it is preferable that at least a part thereof is dissolved in a solvent.

As a result, the heat generated by the irradiation of infrared rays can be transferred to the solvent more efficiently, and the solvent removal efficiency can be made particularly excellent. Further, the infrared absorbing material can function as a dispersion medium for dispersing the particles, and the ejection property of the body portion forming composition 1B'can be further improved.

The content of the infrared absorbing material with respect to 100 parts by volume of the particles is preferably 2 parts by volume or more and 20 parts by volume or less, more preferably 3 parts by volume or more and 18 parts by volume or less, and 4 parts by volume or more and 15 parts by volume or less. The following is more preferable.

As a result, the solvent can be removed more efficiently in the solvent removing step, and the infrared absorbing material can be easily and surely removed in a later step. As a result, the productivity and reliability of the three-dimensional model 10 can be compatible at a higher level.

(binder)
The binder has a function of temporarily bonding particles to each other in layer 1 (second pattern 1B) in a state where the solvent is removed.

By including such a binder, for example, it is possible to more effectively prevent unintentional deformation of the second pattern 1B formed by using the body portion forming composition 1B'. As a result, the dimensional accuracy of the three-dimensional model 10 can be made more excellent. Further, the porosity (porosity) in the three-dimensional model 10 and the density of the three-dimensional model 10 can be preferably adjusted.

The binder may be any binder as long as it has a function of temporarily fixing the particles in the substance-forming composition 1B'(that is, the second pattern 1B) before being subjected to the degreasing step. For example, a thermoplastic resin. , Various resin materials such as curable resin can be used.

When the curable resin is contained, the curable resin may be cured at a timing after the discharge of the body portion forming composition 1B'and before the joining step.

As a result, it is possible to more effectively prevent unintentional deformation of the pattern formed by using the body portion forming composition 1B', and further improve the dimensional accuracy of the three-dimensional modeled object 10. Can be done.

The curing treatment for advancing the curing reaction of the curable resin can be performed, for example, by heating or irradiating with energy rays such as ultraviolet rays.

As the curable resin, for example, various thermosetting resins, photocurable resins and the like can be preferably used.

As the curable resin (polymerizable compound), for example, various monomers, various oligomers (including dimers, trimmers, etc.), prepolymers, and the like can be used, but the composition 1B'for forming the body portion is a curable resin. The (polymerizable compound) preferably contains at least a monomer component. Since the monomer is generally a component having a lower viscosity than the oligomer component or the like, it is advantageous in making the discharge stability of the curable resin (polymerizable compound) more excellent.

As the curable resin (polymerizable compound), one in which addition polymerization or ring-opening polymerization is started by radical seeds or cationic seeds generated from the polymerization initiator by irradiation with energy rays to produce a polymer is preferably used. .. Polymerization modes of addition polymerization include radicals, cations, anions, metatheses, and coordination polymerizations. In addition, examples of the polymerization mode of ring-opening polymerization include cations, anions, radicals, metatheses, and coordination polymerizations.

The composition 1B'for forming a substance portion may contain an oligomer (including a dimer, a trimmer, etc.), a prepolymer, or the like in addition to the monomer as the curable resin (polymerizable compound).

In the composition for forming the substance portion 1B', the binder may be contained in any form, but it is preferably in a liquid state (for example, a molten state, a dissolved state, etc.). That is, it is preferably contained as a constituent component of the dispersion medium.

As a result, the binder can function as a dispersion medium for dispersing the particles, and the ejection property of the body portion forming composition 1B'can be made more excellent.

The decomposition temperature of the binder (in the case of a curable resin, the decomposition temperature in the cured state) is preferably higher than the decomposition temperature of the infrared absorbing material.

As a result, in the degreasing step, the infrared absorbing material can be decomposed in preference to the binder, and it is more effective that the infrared absorbing material unintentionally remains in the finally obtained three-dimensional model 10. Can be prevented. In addition, the stability of the shape of the laminated body 50 in the degreasing step can be made more excellent. Therefore, the reliability of the finally obtained three-dimensional model 10 can be made more excellent.

The content of the binder in the body portion forming composition 1B'is preferably 0.1% by mass or more and 48% by mass or less, and more preferably 0.5% by mass or more and 10% by mass or less.

As a result, the function of temporarily fixing the particles by the binder is more effectively exhibited while making the fluidity of the body portion forming composition 1B'in the second pattern forming step more appropriate. In addition, the binder can be removed more reliably in the degreasing step. From such a thing, it is possible to make the productivity of the three-dimensional model 10 more excellent, and at the same time, improve the dimensional accuracy and reliability of the manufactured three-dimensional model 10.

(Other ingredients)
Further, the composition 1B'for forming the substance portion may contain components other than those described above. Such components include, for example, polymerization initiators; dispersants; surfactants; thickeners; anti-aggregation agents; defoamers; slip agents (leveling agents); dyes; polymerization inhibitors; polymerization accelerators; penetration. Accelerators; wetting agents (moisturizing agents); fixing agents; fungicides; preservatives; antioxidants; ultraviolet absorbers; chelating agents; pH adjusters and the like.

≪Composition for forming support part≫
Next, the support portion forming composition 1A'as the composition for producing the three-dimensional modeled object 10 used for producing the three-dimensional modeled object 10 will be described.

The component for forming the support portion 1A'is not particularly limited as long as it can be used for forming the support portion 5 (formation of the first pattern 1A), but a plurality of particles (mainly). It is preferable that it contains (material particles) and a solvent that disperses the particles, and it is more preferable that it contains a binder. Further, the support portion forming composition 1A'preferably contains an infrared absorbing material.

In the following description, a case where the support portion forming composition 1A'contains a plurality of particles, a solvent, a binder and an infrared absorbing material will be typically described.

(particle)
Since the support portion forming composition 1A'contains a plurality of particles, the support portion 5 (first pattern 1A) to be formed is supported even when it has a fine shape or the like. The portion 5 can be efficiently formed with high dimensional accuracy. Further, the solvent and the binder (including the decomposed product) can be efficiently removed from the gaps between the plurality of particles constituting the support portion 5, and the productivity of the three-dimensional model 10 can be further improved. it can. Further, it is possible to more effectively prevent the solvent, the binder and the like from unintentionally remaining on the degreased body 70, and to improve the reliability of the finally obtained three-dimensional model 10. it can.

Examples of the constituent material of the particles contained in the support portion forming composition 1A ′ include the same materials as those described as the constituent material of the body portion forming composition 1B ′. As a result, the same effect as described above can be obtained.

However, the particles constituting the support portion forming composition 1A'preferably made of a material having a higher melting point than the particles constituting the body portion forming composition 1B'.

The shape of the particles is not particularly limited, and may be any shape such as spherical, spindle-shaped, needle-shaped, tubular, scaly, etc., and may be irregular, but spherical. Is preferable.

The average particle size of the particles is not particularly limited, but is preferably 0.1 μm or more and 20 μm or less, and more preferably 0.2 μm or more and 10 μm or less.

As a result, the fluidity of the support portion forming composition 1A'can be made more suitable, and the first pattern forming step can be performed more smoothly. In addition, the solvent and binder (including decomposition products) can be more efficiently removed from the gaps between the plurality of particles constituting the support portion 5 (first pattern 1A), and the productivity of the three-dimensional model 10 can be improved. It can be made even better. Further, it is possible to more effectively prevent the solvent, the binder and the like from unintentionally remaining on the degreased body 70, and to improve the reliability of the finally obtained three-dimensional model 10. it can. In addition, the dimensional accuracy of the three-dimensional model 10 can be made more excellent.

The Dmax of the particles is preferably 0.2 μm or more and 25 μm or less, and more preferably 0.4 μm or more and 15 μm or less.

As a result, the fluidity of the support portion forming composition 1A'can be made more suitable, and the support portion forming composition 1A'can be supplied more smoothly. In addition, the solvent and binder (including decomposition products) can be more efficiently removed from the gaps between the plurality of particles constituting the support portion 5 (first pattern 1A), and the productivity of the three-dimensional model 10 can be improved. It can be made even better. Further, it is possible to more effectively prevent the solvent, the binder and the like from unintentionally remaining on the degreased body 70, and to improve the reliability of the finally obtained three-dimensional model 10. it can. In addition, the dimensional accuracy of the three-dimensional model 10 can be further improved.

The content of the particles in the support portion forming composition 1A'is preferably 30% by mass or more and 93% by mass or less, and more preferably 35% by mass or more and 88% by mass or less.

As a result, the ease of handling of the support portion forming composition 1A'can be improved, and the amount of components removed in the manufacturing process of the three-dimensional model 10 can be reduced. It is particularly advantageous from the viewpoints of productivity, production cost, resource saving, etc. of the three-dimensional model 10. In addition, the dimensional accuracy of the finally obtained three-dimensional model 10 can be made more excellent.

The particles are made of a material that undergoes a chemical reaction (for example, an oxidation reaction) in the manufacturing process of the three-dimensional model 10 (for example, a joining step), and the support portion forming composition 1A'. The composition of the particles contained therein may be different from that of the constituent material of the final three-dimensional model 10.
Further, the support portion forming composition 1A'may contain two or more kinds of particles.

(solvent)
Since the support portion forming composition 1A'contains a solvent, particles can be suitably dispersed in the support portion forming composition 1A', and the discharge of the support portion forming composition 1A' by a dispenser or the like is stable. Can be done

Examples of the solvent contained in the support portion forming composition 1A ′ include the same solvents as those described as the constituent materials of the body portion forming composition 1B ′. As a result, the same effect as described above can be obtained.

The composition of the solvent contained in the support portion forming composition 1A'may be the same as or different from the composition of the solvent contained in the substance portion forming composition 1B'. ..

The content of the solvent in the support portion forming composition 1A'is preferably 5% by mass or more and 68% by mass or less, and more preferably 8% by mass or more and 60% by mass or less.

As a result, the ease of handling of the support portion forming composition 1A'can be improved, and the amount of components removed in the manufacturing process of the three-dimensional model 10 can be reduced. It is particularly advantageous from the viewpoints of productivity, production cost, resource saving, etc. of the three-dimensional model 10. In addition, the dimensional accuracy of the finally obtained three-dimensional model 10 can be made more excellent.

(Infrared absorbing material)
The infrared absorbing material has a function of absorbing infrared rays and generates heat (heats) by absorbing infrared rays.

When the support portion forming composition 1A'contains the infrared absorbing material, the same effect as described above can be obtained.

The infrared absorbing material contained in the support portion forming composition 1A'satisfy the same conditions (for example, composition, content rate, etc.) as the infrared absorbing material contained in the body portion forming composition 1B'. It may be a thing or a thing with different conditions.

(binder)
The binder has a function of temporarily bonding particles to each other in layer 1 (first pattern 1A) in a state where the solvent is removed.

By including such a binder, for example, it is possible to more effectively prevent unintentional deformation of the first pattern 1A formed by using the support portion forming composition 1A'. As a result, the dimensional accuracy of the three-dimensional model 10 can be made more excellent.

The binder may be any binder as long as it has a function of temporarily fixing particles in the support portion forming composition 1A'(that is, the first pattern 1A) before being subjected to the degreasing step. For example, a thermoplastic resin. , Various resin materials such as curable resin can be used.

When the curable resin is contained, the curable resin may be cured at a timing after the discharge of the support portion forming composition 1A'and before the joining step.

As a result, it is possible to more effectively prevent unintentional deformation of the pattern formed by using the support portion forming composition 1A', and further improve the dimensional accuracy of the three-dimensional modeled object 10. Can be done.

The curing treatment for advancing the curing reaction of the curable resin can be performed, for example, by heating or irradiating with energy rays such as ultraviolet rays.

When the support portion forming composition 1A'contains a curable resin, for example, the same curable resin as that described as a constituent component of the body portion forming composition 1B' may be used. it can.

The curable resin contained in the support portion forming composition 1A'and the curable resin contained in the substance portion forming composition 1B' have the same conditions (for example, the same composition, etc.). It may be, or it may have different conditions.

In the support portion forming composition 1A', the binder may be contained in any form, but is preferably in a liquid state (for example, a molten state, a dissolved state, etc.). That is, it is preferably contained as a constituent component of the dispersion medium.

As a result, the binder can function as a dispersion medium for dispersing the particles, and the ejection property of the support portion forming composition 1A'can be further improved.

The content of the binder in the support portion forming composition 1A'is preferably 0.1% by mass or more and 48% by mass or less, and more preferably 0.5% by mass or more and 20% by mass or less.

As a result, the function of temporarily fixing the particles by the binder is more effectively exhibited while making the fluidity of the support portion forming composition 1A'in the first pattern forming step more appropriate. In addition, the binder can be removed more reliably in the degreasing step. From such a thing, it is possible to make the productivity of the three-dimensional model 10 more excellent, and at the same time, improve the dimensional accuracy and reliability of the manufactured three-dimensional model 10.

(Other ingredients)
Further, the support portion forming composition 1A'may contain components other than those described above. Such components include, for example, polymerization initiators; dispersants; surfactants; thickeners; anti-aggregation agents; defoamers; slip agents (leveling agents); dyes; polymerization inhibitors; polymerization accelerators; penetration. Accelerators; wetting agents (moisturizing agents); fixing agents; fungicides; preservatives; antioxidants; ultraviolet absorbers; chelating agents; pH adjusters and the like.

<< Composition set for manufacturing 3D shaped objects >>
Next, the composition set for producing a three-dimensional model of the present invention will be described.

The composition set for producing a three-dimensional model of the present invention comprises a plurality of types of compositions used for producing a three-dimensional model, and the present invention as described above as at least one of the compositions. The present invention comprises a composition for producing a three-dimensional model (composition containing a plurality of particles, a solvent, and an infrared absorbing material).

Thereby, it is possible to provide a composition set for producing a three-dimensional model which can be used for producing a three-dimensional model having excellent productivity and excellent reliability.

The composition set for producing a three-dimensional model of the present invention may include at least one composition for producing a three-dimensional model of the present invention as described above, but two or more types of the three-dimensional structure of the present invention may be provided. It is preferable to have a composition for producing a modeled object.
As a result, the productivity of the three-dimensional model 10 can be made more excellent.

Further, the composition set for producing a three-dimensional model of the present invention includes at least one composition for forming a body portion 2 used for forming the body portion 2 of the three-dimensional model 10 and a support used for forming the support portion 5. It is preferable that the composition for forming a part is provided with at least one kind.
As a result, the productivity of the three-dimensional model 10 can be made more excellent.

Further, in each of the three-dimensional model manufacturing compositions constituting the three-dimensional model manufacturing composition set of the present invention, it is an object to make the solvent removal rate (for example, the solvent removal rate under the same infrared irradiation conditions) uniform. Therefore, it is preferable to adjust the content of the infrared absorbing material and the like.

As a result, it is possible to more effectively prevent unintentional deformation during manufacturing of the three-dimensional model 10 due to variations in the solvent removal speed, and the dimensional accuracy of the finally obtained three-dimensional model 10 is further improved. Can be.

《Three-dimensional model manufacturing equipment》
Next, the three-dimensional model manufacturing apparatus of the present invention will be described.
FIG. 12 is a cross-sectional view schematically showing a preferred embodiment of a three-dimensional model manufacturing apparatus.

The three-dimensional model manufacturing apparatus M100 is used to manufacture the three-dimensional model 10 by repeatedly forming the layer 1, and the control unit (control means) M1 and the three-dimensional model 10 Support portion forming composition 1A'used for forming the support portion 5 to support the portion to be the actual portion 2 of the support portion forming composition discharge nozzle (first nozzle) M2 and the three-dimensional modeled object. It is provided with a body portion forming composition discharge nozzle (second nozzle) M3 for discharging the body portion forming composition 1B'used for forming the body portion 2 of 10, and an infrared irradiation means M6 for irradiating infrared rays. .. Then, at least one of the support portion forming composition 1A'and the body portion forming composition 1B' includes the composition for producing a three-dimensional model of the present invention (a plurality of particles, a solvent, an infrared absorbing material, and the like. (Composition containing).

As a result, the manufacturing method of the present invention as described above can be suitably executed, and the three-dimensional model 10 having excellent productivity and excellent reliability can be manufactured.

The control unit M1 has a computer M11 and a drive control unit M12.
The computer M11 is a general desktop computer or the like having a CPU, a memory, or the like inside. The computer M11 converts the shape of the three-dimensional model 10 into data as model data, and outputs the cross-section data (slice data) obtained by slicing the shape into parallel thin cross-sections to the drive control unit M12. ..

The drive control unit M12 included in the control unit M1 functions as a control means for driving each of the support unit forming composition discharge nozzle M2, the body part forming composition discharge nozzle M3, the layer forming unit M4, the infrared irradiation means M6, and the like. To do. Specifically, for example, driving the support portion forming composition discharge nozzle M2 and the body portion forming composition discharge nozzle M3, discharging the support portion forming composition 1A'by the support portion forming composition discharge nozzle M2, The substance portion forming composition discharge nozzle M3 controls the ejection of the body portion forming composition 1B', the amount of descent of the stage (elevating stage) M41, the irradiation of infrared rays from the infrared irradiation means M6, and the like.

The layer forming portion M4 was supplied with the support portion forming composition 1A'and the body portion forming composition 1B', and was formed by using the support portion forming composition 1A'and the body portion forming composition 1B'. It has a stage (elevating stage) M41 that supports the layer 1 and a frame body M45 that surrounds the elevating stage M41.

When forming a new layer 1 on the previously formed layer 1, the elevating stage M41 sequentially lowers by a predetermined amount according to a command from the drive control unit M12.

The stage M41 has a flat surface (more specifically, a portion to which the support portion forming composition 1A'and the body portion forming composition 1B'are applied). As a result, the layer 1 having high thickness uniformity can be easily and surely formed.

The stage M41 is preferably made of a high-strength material. Examples of the constituent material of the stage M41 include various metal materials such as stainless steel.

Further, the surface of the stage M41 may be surface-treated. Thereby, for example, the constituent material of the support portion forming composition 1A'and the constituent material of the body portion forming composition 1B' can be more effectively prevented from being firmly adhered to the stage M41, or the stage. The durability of the M41 is particularly excellent, and the three-dimensional model 10 can be stably produced for a longer period of time. Examples of the material used for the surface treatment of the surface of the stage M41 include a fluorine-based resin such as polytetrafluoroethylene.

The support portion forming composition discharge nozzle M2 is configured to move according to a command from the drive control unit M12 and discharge the support portion forming composition 1A'to a desired portion on the stage M41 in a predetermined pattern. There is.

Examples of the support portion forming composition discharge nozzle M2 include an inkjet head nozzle, various dispenser nozzles, and the like, and a dispenser nozzle is preferable.

As a result, the productivity of the three-dimensional model 10 can be made particularly excellent as compared with the case where the composition is ejected by, for example, an inkjet method. Further, even a composition having a relatively high viscosity can be suitably discharged, and the range of material selection is widened.

The size (nozzle diameter) of the discharge portion of the composition discharge nozzle M2 for forming the support portion is not particularly limited, but is preferably 10 μm or more and 100 μm or less.

As a result, the productivity of the three-dimensional model 10 can be made more excellent while the dimensional accuracy of the three-dimensional object 10 can be made more excellent.

The support portion forming composition discharge nozzle M2 preferably discharges the support portion forming composition 1A'as a droplet. As a result, the support portion forming composition 1A'can be imparted with a fine pattern, and even the three-dimensional model 10 having a fine structure can be manufactured with particularly high dimensional accuracy and particularly high productivity. Can be done.

The body portion forming composition discharge nozzle M3 is configured to move according to a command from the drive control unit M12 and discharge the body portion forming composition 1B'to a desired portion on the stage M41 in a predetermined pattern. There is.

Examples of the composition ejection nozzle M3 for forming the body portion include an inkjet head nozzle, various dispenser nozzles, and the like, and a dispenser nozzle is preferable.

As a result, the productivity of the three-dimensional model 10 can be made particularly excellent as compared with the case where the composition is ejected by, for example, an inkjet method. Further, even a composition having a relatively high viscosity can be suitably discharged, and the range of material selection is widened.

The size (nozzle diameter) of the discharge portion of the composition discharge nozzle M3 for forming the body portion is not particularly limited, but is preferably 10 μm or more and 100 μm or less.

As a result, the productivity of the three-dimensional model 10 can be made more excellent while the dimensional accuracy of the three-dimensional object 10 can be made more excellent.

The body portion forming composition discharge nozzle M3 preferably ejects the body portion forming composition 1B'as a droplet. As a result, the composition 1B'for forming the substance portion can be imparted with a fine pattern, and even the three-dimensional model 10 having a fine structure can be manufactured with particularly high dimensional accuracy and particularly high productivity. Can be done.

The infrared irradiation means M6 is configured to irradiate infrared rays toward the layer 1 formed by the support portion forming composition 1A'and the body portion forming composition 1B' in response to a command from the drive control unit M12. ing.

Examples of the infrared irradiation means M6 include a halogen heater, an infrared laser device, and the like.

With the above configuration, a plurality of layers 1 can be laminated to obtain a laminated body 50.
The three-dimensional model 10 can be obtained by subjecting the obtained laminate 50 to a degreasing treatment and a joining treatment (sintering treatment).

The three-dimensional model manufacturing apparatus M100 of the present embodiment includes a degreasing means (not shown) for performing a degreasing treatment and a joining means (sintering means) (not shown) for performing a joining treatment (sintering treatment). May be good.

As a result, the formation of the layer 1 and the like, the degreasing treatment, and the joining treatment can be performed by the same apparatus, and the productivity of the three-dimensional model 10 can be further improved.

《Three-dimensional model》
The three-dimensional model according to the present invention can be manufactured by using the three-dimensional model manufacturing apparatus of the present invention as described above.
As a result, it is possible to manufacture a three-dimensional model having excellent productivity and excellent reliability.

The use of the three-dimensional model is not particularly limited, and examples thereof include ornaments / exhibits such as dolls and figures; and medical devices such as implants.

Further, the three-dimensional modeled object may be applied to any of a prototype, a mass-produced product, and a custom-made product.

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto.

For example, in the above-described embodiment, the single layer has been described as performing the second pattern forming step after the first pattern forming step, but in forming at least one layer, the first pattern forming step. And the order of the second pattern forming step may be reversed. Further, a plurality of kinds of compositions may be applied simultaneously in different regions.

Further, in the above-described embodiment, the case where the solvent removing step is performed after the first pattern forming step and the second pattern forming step are performed on the single layer is typically described. For example, the first pattern is described. The solvent removing step may be performed individually after the pattern forming step and after each of the second pattern forming step.

Further, in the above-described embodiment, the case where the first pattern and the second pattern are formed in the formation of all the layers has been typically described, but the laminated body is, for example, a layer having no first pattern. Alternatively, it may include a layer that does not have a second pattern. Further, even if a layer (for example, a layer composed of only the support portion) in which a portion corresponding to the body portion is not formed is formed on the contact surface with the stage (immediately above the stage), the layer can function as a sacrificial layer. Good.

Further, in the method for manufacturing a three-dimensional model of the present invention, the order of steps and treatments is not limited to those described above, and at least a part thereof may be replaced. For example, in the above-described embodiment, the case where the degreasing step, the support portion removing step, and the sintering step are performed in this order after obtaining the laminated body has been typically described, but these orders may be changed. .. More specifically, the degreasing step, the sintering step, and the support portion removing step may be performed in this order, or the support portion removing step, the degreasing step, and the sintering step may be performed in this order. Further, for example, the layer forming step and the solvent removing step may be performed simultaneously. Further, each layer may be subjected to sequential joining treatment. In this case, the bonding treatment to each layer can be suitably performed by, for example, irradiation with laser light.

Further, for example, when a composition containing no binder is used, the degreasing step can be omitted. Further, even when a composition containing a binder is used, the binder may be removed together with the bonding of the particles in the bonding step, and in such a case, the degreasing step can be omitted.

Further, in the above-described embodiment, the case where the particles contained in the composition for forming the body portion are bonded and the particles contained in the composition for forming the support portion are not bonded in the bonding step will be mainly described. However, in the joining step, the particles contained in the composition for forming the support portion may be joined together with the joining of the particles contained in the composition for forming the body portion.
Further, depending on the shape of the three-dimensional model to be manufactured, it is not necessary to form the support portion.

Further, in the production method of the present invention, a pretreatment step, an intermediate treatment step, and a posttreatment step may be performed as necessary.

Examples of the pretreatment step include a stage cleaning step and the like.
Examples of the post-treatment step include a cleaning step, a shape adjusting step of performing deburring, a coloring step, a coating layer forming step, a heat treatment step for improving the bonding strength of particles, and the like.

Further, in the three-dimensional model manufacturing apparatus of the present invention, the configuration of each part can be replaced with an arbitrary configuration that exhibits the same function, and an arbitrary configuration can be added.

Further, in the above-described embodiment, the case where the layer is directly formed on the surface of the stage has been typically described. For example, a modeling plate is arranged on the stage, and the layers are laminated on the modeling plate for three-dimensional modeling. You may manufacture things.

Further, the method for manufacturing a three-dimensional model of the present invention is not limited to the one executed by using the three-dimensional model manufacturing apparatus as described above.

The present invention will be described in more detail with reference to specific examples below, but the present invention is not limited to these examples. In the following description, the treatments that do not particularly indicate the temperature conditions are performed at room temperature (25 ° C.). Further, among various measurement conditions, those that do not particularly indicate the temperature conditions are numerical values at room temperature (25 ° C.).

[1] Production of composition for producing three-dimensional modeled product (Example 1)
Cu powder with an average particle size of 3.0 μm: 81.5 parts by mass, carbitol acetate as a solvent: 13.0 parts by mass, copper phthalocyanine dye as an infrared absorbing material: 0.5 parts by mass, as a binder By mixing with 5.0 parts by mass of the methacrylic resin of the above, a composition for forming a substance part as a composition for producing a three-dimensional model (composition for forming a layer) was obtained. The content of the infrared absorbing material with respect to 100 parts by volume of the particles (Cu powder) was 9 parts by volume.

Alumina powder having an average particle size of 3.0 μm: 74.1 parts by mass, carbitol acetate as a solvent: 17.6 parts by mass, and a copper phthalocyanine dye as an infrared absorbing material: 2.1 parts by mass. By mixing with a methacrylicate resin as a binder: 6.2 parts by mass, a composition for forming a support portion as a composition for producing a three-dimensional modeled product (composition for forming a layer) was obtained. The content of the infrared absorbing material with respect to 100 parts by volume of the particles (alumina powder) was 18.6 parts by volume.

As a result, a composition for producing a three-dimensional model, which was composed of a composition for forming a body portion and a composition for forming a support portion, was obtained.

The infrared absorbing material was contained in the composition for forming the body portion and the composition for forming the support portion in a dissolved state.

[2] Manufacture of a three-dimensional model using the composition for manufacturing a three-dimensional model obtained as described above, the design dimensions are a rectangular parallelepiped shape having a thickness of 4 mm, a width of 10 mm, and a length of 80 mm. The three-dimensional model was manufactured as follows.

First, a three-dimensional model manufacturing apparatus as shown in FIG. 12 is prepared, and the support portion forming composition is formed as a plurality of droplets on the stage in a predetermined pattern from the support portion forming composition ejection nozzle of the dispenser. The first pattern (pattern for the support portion) was formed by discharging.

Next, a second pattern (substance pattern) is formed by ejecting the substance-forming composition as a plurality of droplets on the stage in a predetermined pattern from the substance-forming composition ejection nozzle of the dispenser. did.

As a result, a layer composed of the first pattern and the second pattern was formed. The thickness of the layer was 50 μm.

Then, the layer composed of the first pattern and the second pattern was subjected to an infrared irradiation process of irradiating infrared rays from a halogen heater as an infrared irradiation means. By this treatment, the infrared absorbing material in the layer generated heat, the temperature of the entire layer rose, and the solvent was removed from the layer. The light emitted by the halogen heater had a spectrum having a maximum value at a wavelength of 1 μm. Further, the energy per unit area of infrared rays irradiating the layer (energy per unit area in the region where the solvent should be removed) was set to 100 mJ / cm ² .

After that, a new layer forming step (first pattern forming step, second pattern forming step) and a solvent removing step are repeatedly performed on the layer from which the solvent has been removed to obtain a three-dimensional model to be manufactured. A laminate having the corresponding shape was obtained.

Next, the obtained laminate was subjected to a degreasing treatment by heating in argon gas under the condition of 500 ° C. for 5 hours to obtain a degreased body.

Next, the support part was removed by a method of removing the support part from the degreased body with a brush.
Then, the degreased body from which the support portion was removed was subjected to a sintering treatment (bonding treatment) by heating under the condition of 980 ° C. × 2 hours in hydrogen gas to obtain a three-dimensional model.

(Example 2)
The above-mentioned implementation was carried out except that the compositions for forming the body portion and the composition for forming the support portion were as shown in Table 1, the gas atmosphere was argon gas, and the processing temperature in the sintering treatment was 1380 ° C. A composition for producing a three-dimensional model (composition set for producing a three-dimensional model) and a three-dimensional model were produced in the same manner as in Example 1.

(Example 3)
As the composition for producing a three-dimensional model (layer forming composition), only the composition for forming the body part was used, and the composition for forming the support part was not used (the first pattern forming step was omitted). , A composition for producing a three-dimensional model and a three-dimensional model were produced in the same manner as in Example 1.

(Comparative Example 1)
A composition for producing a three-dimensional model (three-dimensional model) in the same manner as in Example 1 except that the composition for forming the body portion and the composition for forming the support portion are as shown in Table 1. (Composition set for production), a three-dimensional model was manufactured.

Table 1 shows the compositions of the three-dimensional model manufacturing compositions (three-dimensional model manufacturing composition set) of each of the Examples and Comparative Examples. In Table 1, carbitol acetate is shown as "CA", methacrylic resin is shown as "PM", and copper phthalocyanine pigment is shown as "IRA1".

Further, the viscosities of the support portion forming composition and the body portion forming composition used in each of the above Examples and Comparative Examples were all in the range of 1000 mPa · s or more and 20000 mPa · s or less. In addition, the volumes of the support portion forming composition and the body portion forming composition per droplet in each of the above Examples and Comparative Examples were values within the range of 50 pL or more and 100 pL or less. In addition, the infrared absorbing materials used in each of the above examples all have a wavelength of 40% or more in the infrared region, a decomposition temperature of 300 ° C or more and 600 ° C or less, and an infrared region. In the absorption spectrum of the above, the absorption maximum was found in the region of 0.74 μm or more and 4 μm or less. In addition, all of the infrared absorbing materials used in the above examples had a spectrum having an absorption maximum at a wavelength different from that of other components of the composition for producing a three-dimensional model in the infrared region. .. Further, in each of the above-mentioned examples, the decomposition temperature of the infrared absorbing material was higher than the boiling point of the solvent. Further, in each of the above examples, the content of the solvent in each layer after infrared irradiation was a value in the range of 0.5% by mass or more and 2.0% by mass or less.

[3] Evaluation [3.1] Productivity of 3D model (solvent removal efficiency)
For each of the Examples and Comparative Examples, each three-dimensional model manufacturing composition (substance portion forming composition, support portion forming composition) was used in the same manner as described above, and the thickness was 100 μm. Formed a single layer of.

Then, each of these layers was irradiated with infrared rays under the same conditions as described above using the halogen heater.

The time until the amount of the solvent contained in the layer becomes 5% at the initial stage (the time until the content of the solvent becomes 1/20 of the content in the composition for producing a three-dimensional model) is measured. , Evaluated according to the following criteria. It can be said that the shorter the time is, the more efficiently the solvent can be removed, and it can be said that the productivity of the three-dimensional model is excellent.

A: It takes less than 30 seconds for the amount of solvent to reach 5% of the initial value.
B: The time until the solvent amount reaches the initial 5% is 30 seconds or more and less than 40 seconds.
C: The time until the amount of solvent reaches 5% of the initial value is 40 seconds or more and less than 50 seconds.
D: The time until the amount of solvent reaches 5% of the initial value is 50 seconds or more and less than 60 seconds.
E: The time until the solvent amount reaches the initial 5% is 60 seconds or more.

[3.2] Dimensional accuracy The thickness, width, and length of the three-dimensional modeled objects of each of the Examples and Comparative Examples were measured, the amount of deviation from the design value was determined, and the three-dimensional model was evaluated according to the following criteria.

A: Among the thickness, width, and length, the deviation amount from the design value is less than 1.0% for the one having the largest deviation amount from the design value.
B: Among the thickness, width, and length, the deviation amount from the design value is 1.0% or more and less than 2.0% for the one having the largest deviation amount from the design value.
C: Among the thickness, width, and length, the deviation amount from the design value is 2.0% or more and less than 4.0% for the one having the largest deviation amount from the design value.
D: Of the thickness, width, and length, the deviation amount from the design value is 4.0% or more and less than 7.0% for the one having the largest deviation amount from the design value.
E: Of the thickness, width, and length, the deviation amount from the design value is 7.0% or more for the one having the largest deviation amount from the design value.
These results are summarized in Table 2.

As is clear from Table 2, in the present invention, it was possible to efficiently manufacture a three-dimensional model with high dimensional accuracy. On the other hand, in the comparative example, satisfactory results were not obtained.

10 ... 3D model, 50 ... Laminate, 70 ... Solvent degreased body, 1 ... Layer, 1'... Composition for manufacturing 3D model (layer formation composition), 1A' ... Support part forming composition, 1B'... composition for forming the body part, 1A ... first pattern (pattern for the support part), 1B ... second pattern (pattern for the body part), 2 ... joint part (body part), 5 ... support part ( Support unit, support material), M100 ... Three-dimensional model manufacturing device, M1 ... Control unit (control means), M11 ... Computer, M12 ... Drive control unit, M2 ... Support unit forming composition discharge nozzle (first nozzle) ), M3 ... Composition discharge nozzle (second nozzle) for forming the body part, M4 ... Layer forming part, M41 ... Stage (elevating stage), M45 ... Frame, M6 ... Infrared irradiation means, E ... Infrared

Claims (12)

A composition for manufacturing a three-dimensional model used for manufacturing a three-dimensional model.
With multiple particles,
A solvent that disperses the particles and
Infrared region absorptivity has a wavelength of 20% or more, viewed contains an infrared-absorbing material having a function of absorbing infrared rays,
A composition for producing a three-dimensional model, wherein the content of the infrared absorbing material with respect to 100 parts by volume of the particles is 2 parts by volume or more and 20 parts by volume or less . The decomposition temperature of the infrared-absorbing material, the 3D object producing composition according to claim 1 is 250 ° C. or higher. As the infrared absorbing material, cyanine dyes, phthalocyanine dyes, naphthalocyanine compounds, squarylium dye, a quinone compound, one selected from the group consisting of diimmonium compound and azo compound or contain two or more kinds in claim 1 or 2 The composition for producing a three-dimensional model described. The composition for producing a three-dimensional model according to any one of claims 1 to 3 , wherein the particles include at least one of a metal material and a ceramic material. The three-dimensional modeling according to any one of claims 1 to 4 , further comprising a binder having a function of temporarily bonding the particles to each other in a state where the solvent is removed. Composition for manufacturing products. The composition for producing a three-dimensional model according to claim 5 , wherein the decomposition temperature of the binder is higher than the decomposition temperature of the infrared absorbing material. The composition for producing a three-dimensional model according to claim 5 or 6, wherein the binder and the infrared absorbing material are removed after the irradiation of the infrared rays in the process of producing the three-dimensional model. A composition set for producing a three-dimensional model, which comprises a plurality of types of compositions.
A three-dimensional model manufacturing composition set comprising two or more of the three-dimensional model manufacturing compositions according to any one of claims 1 to 7 . A composition set for producing a three-dimensional model, which comprises a plurality of types of compositions.
The composition for producing a three-dimensional model according to any one of claims 1 to 7 is provided as at least one of the compositions.
At least one composition for forming a body part used for forming a body part of a three-dimensional model is provided, and
A composition for producing a three-dimensional model, which comprises at least one composition for forming a support portion used for forming a support portion that supports a portion to be a body portion at the time of manufacturing the three-dimensional model. set. A layer forming step of forming a layer using the composition for producing a three-dimensional model according to any one of claims 1 to 7 and a solvent removing step of removing the solvent contained in the layer are included. Repeat a series of steps
A method for producing a three-dimensional model, which comprises irradiating infrared rays in the solvent removing step. The method for manufacturing a three-dimensional model according to claim 10 , further comprising a joining step of performing a joining process for joining the particles after repeating the series of steps. It is a three-dimensional model manufacturing device that manufactures a three-dimensional model by repeatedly forming layers.
A nozzle for discharging the composition for producing a three-dimensional model according to any one of claims 1 to 7 .
A three-dimensional model manufacturing apparatus including an infrared irradiation means for irradiating infrared rays.

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