JP2017177497A - Linear resin formed product, configuration generating method of 3-dimensional object and producing method of linear resin formed product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear resin formed product in which a formed product may be formed to have high flexibility and smooth transfer may be realized in a transporting mechanism of 3D-printer, and to further provide a configuration generating method of 3-dimensional object and a producing method of the linear resin formed product.SOLUTION: There is provided a linear resin formed product used in a heat melting lamination type 3D-printer. It comprises a core material part containing a thermoplastic elastomer and one or more linear reinforcement parts which are formed with material different from the core material part on a part of the peripheral surface of the core material part and extends along a longitudinal direction of the core material part. As material for forming the linear reinforcement part, thermoplastic resin material which may be removed by dissolving with an organic solvent is included. In production, a molten mixed thermoplastic elastomer is continuously extruded from an extrusion machine and thermoplastic resin material different from the core material part is supplied to the peripheral surface of the extruded core material part to be joined so that one or more linear reinforcement parts extending along the longitudinal direction of the core material part are formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a linear resin molded body used as a modeling material in a modeling apparatus for constructing a three-dimensional object (three-dimensional object) such as a so-called 3D printer, and further, a three-dimensional object using the same. The present invention relates to a modeling method and a method for manufacturing a linear resin molded body.

  A so-called 3D printer is attracting attention as a method for forming a three-dimensional object, and it has become possible to easily produce a three-dimensional object having a complicated shape, which has been difficult to realize so far. If a 3D printer is used, it is possible to process even a shape that cannot be realized by a normal method by stacking arbitrary materials such as resin and metal.

  Several types of 3D printers are known, and among them, the method of extruding and depositing resin strands (linear bodies) (thermal melting lamination method) is advantageous in terms of cost. Therefore, development is proceeding in various directions (see, for example, Patent Document 1 and Patent Document 2).

  For example, in the additive manufacturing system of Patent Document 1, a filament as a modeling material is supplied to an extrusion head, the filament is melted by a liquefier mounted on the extrusion head, and the melted filament is extruded onto a base through a nozzle. The extrusion head and base move relatively to form a 3D model, and a large number of linear and layered materials are stacked to produce a 3D model.

  In Patent Document 2, the modified ABS material is delivered to the extrusion head of the laminated deposition system by extrusion, and the delivered modified ABS material is melted in the extrusion head under conditions that improve the response time of the extrusion head. And a method for constructing a 3D object is disclosed that includes depositing molten thermoplastic material layer by layer to form the 3D object.

  In this type of method, the basic idea is to melt and deposit the resin material, and resin strands (striates) are used as the raw material. Patent Document 3 and Patent Document 4 disclose a resin strand used as a raw material, a supply method thereof, and the like.

  Patent Document 3 discloses a composition for producing a three-dimensional object, but in an extruder for producing a shaped article, it is supplied as a flexible filament to an extrusion head. The filament is melted in a liquefier carried by the extrusion head. The liquefier heats the filament to a temperature slightly above the freezing point to bring it into a molten state. The molten material is extruded onto the pedestal through the orifice of the liquefier.

  Patent Document 4 discloses a filament cassette and a filament cassette receiver for supplying filaments in a three-dimensional deposition modeling machine. Patent Document 3 provides a method for engaging and separating a filament from a modeling machine in a simple manner so that it can be realized in a manner that protects the filament from moisture in the environment.

Special table 2009-500194 gazette Special table 2010-521339 Japanese Patent No. 5039549 Japanese Patent No. 4107960

  By the way, in the hot melt lamination type 3D printer, modeling of various three-dimensional objects is demanded. For example, modeling of a soft three-dimensional object with touch is also demanded. In modeling a soft three-dimensional object, it is necessary to use a filament using a highly flexible material such as an elastomer as a filament for modeling.

  However, a highly flexible filament has a problem that it cannot be sent out smoothly during modeling with a hot melt lamination type 3D printer. In the hot melt lamination type 3D printer, as a filament feeding mechanism, a method of feeding a filament directly to the tip of a nozzle by biting with a gear or the like is employed. In the case of a highly flexible filament made of elastomer, the filament is not bitten and cannot be supplied to the nozzle tip.

  The present invention has been proposed in view of the above-described problems of the prior art, and can form a highly flexible shaped article and can be smoothly fed by a feed mechanism of a 3D printer. It aims at providing a molded object, Furthermore, it aims at providing the modeling method of a three-dimensional object, and the manufacturing method of a linear resin molded object.

  In order to achieve the above-mentioned object, a linear resin molded body of the present invention is a linear resin molded body used in a hot melt lamination type 3D printer, and includes a core material portion including a thermoplastic elastomer, and the core A part of the outer peripheral surface of the material part is formed of a material different from that of the core part, and has one or more linear reinforcing parts extending along the longitudinal direction of the core part.

  Also, the 3D object modeling method of the present invention is a 3D object modeling method using a hot melt lamination type 3D printer, wherein a core part including a thermoplastic elastomer and a part of an outer peripheral surface of the core part are provided. Using a linear resin molded body formed of a thermoplastic resin material different from the core material portion and having one or more linear reinforcing portions extending along the longitudinal direction of the core material portion as the modeling material, The resin-molded body is melt-extruded and laminated to form a three-dimensional object, and then the linear reinforcing portion is dissolved and removed with an organic solvent.

  Furthermore, the manufacturing method of the linear resin molded body of the present invention is a manufacturing method of a linear resin molded body used for a hot melt lamination type 3D printer, and continuously melted and kneaded thermoplastic elastomer from an extruder. One or more linear shapes that extend along the longitudinal direction of the core material portion are extruded and supplied with the thermoplastic resin material different from the core material portion to the outer peripheral surface of the extruded core material portion. A reinforcing portion is formed.

  In the linear resin molded body and the method for modeling a three-dimensional object according to the present invention, the linear reinforcing portion is formed on the peripheral surface of the core portion made of thermoplastic elastomer, so that the core portion is a flexible filament. However, the rigidity necessary for smooth feeding and three-dimensional modeling is imparted.

  According to the present invention, it is possible to form a highly flexible three-dimensional object, and it is possible to provide a linear resin molded body capable of smoothly supplying a modeling material in a feeding mechanism of a 3D printer. In the method for modeling a three-dimensional object of the present invention using such a linear resin molded body, it is possible to produce a high-quality modeled object (three-dimensional object) with high flexibility.

  Moreover, according to the manufacturing method of the linear resin molding of this invention, the linear resin molding which has the said characteristic can be mass-produced, and it is rich in flexibility by using this as a modeling material of a three-dimensional object. Modeling of a model is possible.

It is a perspective view of the filament resin molding which concerns on embodiment of this invention. It is sectional drawing of the linear resin molded object shown by FIG. It is a schematic sectional drawing which shows the other example of the linear resin molded object to which this invention is applied, (a) is a linear resin molded object which provided one linear reinforcement part, (b) is a linear reinforcement part. Two linear resin molded bodies provided, and (c) shows a linear resin molded body provided with four linear reinforcing portions. It is a side view of the apparatus which manufactures a filament resin molding. It is a top view of the apparatus which manufactures a filament resin molding. It is a disassembled perspective view which shows the structural example of the metal mold | die used when manufacturing a linear resin molding. It is a disassembled perspective view of a sizing device. It is a top view of a sizing apparatus, and is a figure which fractures | ruptures and shows an upper member.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. The same number is attached | subjected to the same element through the whole description of embodiment.

  First, an outline of the 3D printer will be described. The basic mechanism is to create a three-dimensional object, that is, a 3D (three-dimensional) object, by stacking cross-sectional shapes using 3D data created by a computer as a design drawing. The methods include, for example, an ink jet method in which a liquid resin is irradiated with ultraviolet rays or the like to be cured little by little, a powder fixing method in which an adhesive is sprayed onto a powder resin, and a resin melted by heat being stacked little by little. There are methods such as hot melt lamination. The linear resin molded body according to the present embodiment is used in a hot melt lamination method, and is supplied to a 3D printer in a state of being wound around a reel, for example.

  Next, the structure of the linear resin molding which concerns on this embodiment is demonstrated based on FIG. 1, FIG. As shown in FIG. 1, the linear resin molded body 10 is a modeling material used in a hot melt lamination type 3D printer, and a core material portion 21 serving as a first layer and an outer peripheral surface of the core material portion 21. And a linear reinforcing portion 22 formed as a second layer.

  The core material portion 21 is a main part of the linear resin molded body 10 of the present embodiment, and a three-dimensional object is formed by the core material portion 21. Moreover, the core part 21 is formed of a soft resin material, and a three-dimensional object to be formed has a soft touch.

  Therefore, any material can be used as the material of the core member 21 as long as it is rich in flexibility, and examples of the material include thermoplastic elastomer. Examples of the thermoplastic elastomer include styrene-based elastomer, olefin-based elastomer, urethane-based elastomer, amide-based elastomer, vinyl chloride-based elastomer, and the like. Among them, styrene-based elastomer is preferable. Specific examples of the styrene elastomer include Kuraray Co., Ltd., trade name Arneston, etc., among which ultra low hardness grade trade name JS20N can be used.

  On the other hand, the linear reinforcing part 22 is provided for the purpose of imparting rigidity to the linear resin molded body 10 mainly composed of the flexible core part 21. As described above, if the linear resin molded body 10 is formed of a flexible material, the linear resin molded body 10 may not be engaged with the gear and cannot be smoothly fed out by the filament feeding mechanism of the 3D printer. Therefore, by providing the linear reinforcing portion 22 on the outer peripheral surface of the linear resin molded body 10 mainly composed of the flexible core portion 21, that is, by providing a partial laminated structure, the apparent appearance of the linear resin molded body 10 is obtained. The rigidity is improved, and the feeding mechanism makes the feeding smooth.

  The said linear reinforcement part 22 is formed in a part of outer peripheral surface of the core material part 21 with a material different from the core material part 21, and is formed so that it may extend along the longitudinal direction of the core material part 21. FIG. In the case of this example, as shown in FIG. 2, three linear reinforcing portions 22 are equiangularly spaced on the outer peripheral surface of the core material portion 21 in the cross-sectional view of the linear resin molded body 10 (120 ° intervals here). It is formed with.

  Here, the number of the linear reinforcing portions 22 is arbitrary, and for example, as shown in FIG. 3 (A), four lines may be provided at equiangular intervals (90 ° intervals), or FIG. 3 (B). As shown, two may be provided at equiangular intervals (180 ° intervals). Alternatively, as shown in FIG. 3C, it is possible to provide only one linear reinforcing portion 22, but it is preferable to provide a plurality of linear reinforcing portions 22 in consideration of rigidity balance and the like. . Of course, the present invention is not limited to this, and more linear reinforcing portions 22 can be formed. However, considering the ease of manufacturing and the effect thereof, it is preferable that the number is three to four.

  The material constituting the linear reinforcing portion 22 is preferably a resin material having higher rigidity than the core portion 21. Moreover, it is preferable that the said linear reinforcement part 22 can be removed after modeling of a three-dimensional object. If the linear reinforcing portion 22 remains in the three-dimensional object, the flexibility of the modeled object may be impaired. If the linear reinforcing part 22 can be dissolved and removed, it is possible to obtain a highly flexible model that could not be obtained so far.

  Therefore, the material constituting the linear reinforcing portion 22 is preferably a resin soluble in a compound having a hydroxyl group such as water or alcohol, and polyvinyl alcohol, soluble polyamide, or the like is preferable. Polyvinyl alcohol and soluble polyamide can be easily dissolved and removed with water or an organic solvent. As polyvinyl alcohol and soluble polyamide, any commercially available products can be used. For example, as polyvinyl alcohol, J series (for example, trade names JP-05, JR-05) manufactured by Nihon Acetate / Poval. Can be mentioned. Examples of the soluble polyamide include Toray Co., Ltd., trade name soluble copolymer nylon CM4000, CM4001, and CM8000.

  In addition, an inorganic filler or the like can be added to the resin material constituting the linear reinforcing portion 22 in order to improve rigidity. As the inorganic filler, fibrous or powdery materials can be used, and the material thereof is also arbitrary. Illustrative examples include carbon fiber (carbon fiber), glass fiber (glass fiber, glass wool, etc.), talc, nanoclay, calcium carbonate, magnesium carbonate and the like.

  The above is the configuration of the linear resin molded body 10 to which the present invention is applied. By using the linear resin molded body 10, it is possible to use the gear in the feed mechanism portion during modeling with a hot melt lamination type 3D printer. Biting and the like are possible, and modeling becomes easy. Moreover, handling of the linear resin molding 10 is also easy. Further, by removing the linear reinforcing portion 22 after modeling, it is possible to obtain a highly flexible model that could not be obtained so far. In addition, although the linear reinforcement part 22 is dissolved and removed with water or an organic solvent, what is necessary is just to select the solvent for melt | dissolution according to the material of the linear reinforcement part 22. FIG. For example, when the linear reinforcement part 22 is formed of polyvinyl alcohol, the linear reinforcement part 22 may be dissolved and removed using water. When the linear reinforcing part 22 is formed of soluble polyamide, the linear reinforcing part 22 may be dissolved and removed using alcohol. Of course, the present invention is not limited to this, and any solvent may be used as long as it can dissolve and remove the linear reinforcing portion 22.

  Next, an embodiment of a method (production line) for producing a linear resin molded body to which the present invention is applied will be described.

  As shown in FIG. 4, the production line 30 of the linear resin molded body 10 of this embodiment includes an extruder 31, a mold 32, a sizing device 33, an air cooling tank 37, a fixed roller 41, an outer diameter dimension measuring device 42, and A winding device 43 is included.

  The extruder 31 melts and kneads the raw resin composition and continuously supplies it to the mold 32, and includes, for example, a cylinder in which a screw is incorporated, a raw material charging hopper 31a, an injection nozzle, and the like. It is configured. The raw material resin composition charged from the raw material charging hopper is melt-kneaded by a screw in the cylinder and injected from the injection nozzle to the mold 32.

  The mold 32 extrudes the molten resin from the extruder 31 in the horizontal direction, and the molten resin extruded from the mold 32 is cooled to become the filament resin molded body 10.

  When manufacturing the linear resin molding 10 of this invention, it is necessary to extrude two types of resin from which material differs. Specifically, in the mold 32, a continuous body of the linear resin molded body 10 having a partially laminated structure is formed by extruding the material of the linear reinforcing portion on the peripheral surface of the extruded core material portion. .

  FIG. 5 is a plan view of an apparatus used when manufacturing the linear resin molded body 10 of the present invention. When the linear resin molded body 10 of the present invention is molded, the two extruders 31A and 31B are arranged so as to be orthogonal to each other. Then, for example, a raw material resin composition (thermoplastic elastomer) for forming the core material portion is introduced from the hopper 31a of the extruder 31A, melted and extruded into the mold 32, and linear from the hopper 31b of the extruder 31B. A raw material resin composition (polyvinyl alcohol, soluble polyamide or the like) for forming the reinforcing portion is charged and melt extruded into the mold 32. The raw material resin compositions extruded from the respective extruders 31A and 31B are merged by the mold 32, and a linear reinforcing portion is formed on the peripheral surface of the core portion.

  As the mold 32 used when the linear resin molded body 10 is manufactured, for example, a multilayer mold as shown in FIG. 6 may be used. The multilayer mold of this example is a combination of three mold members 32A, 32B, and 32C. Each mold member 32A, 32B, 32C has a central flow path N1, N2, N3 penetrating in the thickness direction.

  Further, the mold member 32A has an annular channel CR surrounding the central channel N1, and a semicircular intermediate passage HR outside the annular channel CR. This semicircular intermediate passage HR is connected to the annular flow passage CR at a 180 ° symmetrical position. Further, the mold member 32A has a material supply passage X connected to one place of the intermediate passage HR.

  The mold member 32B has three through holes penetrating in the thickness direction at positions opposed to the annular flow path CR of the mold member 32A, and the central flow path is based on the opening of each through hole. Radiation flow paths Y1, Y2, and Y3 extending radially toward N2 are formed.

  In the mold 32 in which the three mold members 32A, 32B, and 32C are combined, the raw material resin composition for forming the core material portion is extruded from the extruder 31A, and enters the central flow path N1 of the mold member 32A. And is pulled out from the mold 32 through the central flow path N2 of the mold member 32B and the central flow path N3 of the mold member 32C. On the other hand, the raw material resin composition for forming the linear reinforcing portion is extruded from the extruder 31B and supplied to the material supply passage X of the mold member 32A. The raw material resin composition supplied from here flows into the annular channel CR through the semicircular intermediate passage HR and from each through hole of the mold member 32B provided to face the annular channel CR. It is supplied to the radiation channels Y1, Y2, Y3. And it joins with a core material part in three places of the outer peripheral surface of the core material part which passes the inside of the center flow path N2 at the front-end | tip of each radiation flow path Y1, Y2, Y3. Thereby, the linear resin molding 10 of the structure shown to FIG. 1, 2 is shape | molded.

  In the mold 32 of this embodiment, the raw material resin composition is supplied to the radiation flow paths Y1, Y2, Y3 of the mold member 32B via the annular flow path CR of the mold member 32A. However, by supplying the raw material resin composition to the annular flow path CR, the flow rates of the raw material compositions supplied to the radiation flow paths Y1, Y2, Y3 are equalized. In the linear resin molded body 10, if the balance of the linear reinforcing portions 22 formed at three locations is lost, the linear resin molded body 10 may be bent and handling may be difficult.

  The filament resin form 10 drawn out from the mold 32 is guided to the air cooling tank 37. The air cooling tank 37 is box-shaped along the conveying direction of the filament resin molded body 10 extruded from the extruder 31. Formed. The filament resin molded body 10 is introduced into the air-cooling tank 37 from one end wall of the air-cooling tank 37 and is led out from the other wall of the air-cooling tank 37. A cooled gas for cooling the filament resin molded body 10 circulates inside the air cooling tank 37.

  The sizing device 33 is disposed inside the wall at one end of the air cooling tank 37, makes the cross section of the linear resin molded body 10 sent from the extruder 31 into the air cooling tank 37 into a perfect circle, and the linear resin. It has a function of making the outer diameter dimension of the molded body 10 uniform to a predetermined dimension.

  In the present embodiment, the sizing device 33 performs vacuum suction. That is, by passing the sizing device 33 having a circular space, the linear shape and the wire diameter of the linear resin molded body 10 are adjusted to some extent, but this is not sufficient, so in this embodiment, by vacuum suction. We will promote this.

  As shown in FIGS. 7 and 8, the sizing device 33 includes a pair of upper and lower lower members 33D and an upper member 33U, and the mating surfaces of the lower member 33D and the lower member 33D are provided with the linear resin molded body 10. A semi-cylindrical first groove 33a that is formed along the conveying direction of the continuous body and passes through the linear resin molded body 10, and a plurality of (this example) intersecting the first groove 33a so as to be orthogonal to the first groove 33a Then, seven second) vacuum suction second grooves 33b arranged in parallel with each other are provided. The number of the second grooves 33b for vacuum suction is arbitrary, and may be set as appropriate so that the shaping accuracy of the linear resin molded body 10 after passing through the sizing device 33 is sufficiently good. Further, the second groove 33b for vacuum suction can be provided not only in the horizontal direction but also in an arbitrary direction such as a vertical direction and an oblique direction, and is appropriately set so that the shaping accuracy is sufficiently good. You only have to set it.

  By performing vacuum suction in the sizing device 33, a vacuum suction force acts on the linear resin molded body 10. As a result, the outer peripheral surface of the linear resin molded body 10 is attracted to the wall surface facing the circular cross-sectional space of the groove 33a provided in the lower member 33D and the upper member 33U, and the shape and diameter of the space formed by the groove 33a are reduced. It is shaped. As a result, the linear resin molded body 10 that has passed through the sizing device 33 has a substantially circular cross section, and the diameter thereof is substantially consistent with the set value (the diameter of the space).

  The fixed roller 41 stabilizes the posture of the linear resin molded body 10 in the air cooling tank 37 via the sizing device 33 and conveys the linear resin molded body 10 toward the winding device 43 side.

  The outer diameter measuring device 42 measures the outer diameter of the linear resin molded body 10 cooled in the air cooling bath 37. The winding device 43 is disposed on the downstream side of the pair of upper and lower winding rollers 43a that conveys the linear resin molded body 10 that has passed through the outer diameter measuring device 42 to the downstream side, and the winding roller 43a. And a bobbin winder 43b having a winding shaft 43c for winding the resin molded body 10.

  Next, a method for manufacturing the linear resin molded body 10 using the manufacturing line 30 will be described. The method for manufacturing the linear resin molded body 10 includes an extrusion process, a sizing process, a cooling process, a dimension measuring process, and a winding process.

  As shown in FIG. 3, in the extrusion process, the resin pellets fed from the hopper 31 a in the extruder 31 are melted, and the melted resin is extruded from the mold 32. At this time, the core portion 21 is extruded and the linear reinforcing portion 22 is extruded so as to cover a part of the outer peripheral surface of the core portion 21 to extrude the linear resin molded body 10 having a partially multilayered structure. In this example, a linear resin molded body 10 having an outer diameter (indicated by reference sign D1) of 2.2 mm is extruded from the mold 32.

  In the sizing step, as shown in FIGS. 7 and 8, in the sizing device 33, the linear resin molded body 10 travels along the transport path 35 formed by the upper and lower first grooves 33a, and a plurality of them are simultaneously used. By being vacuum-sucked by the suction passage 36 formed by the upper and lower second grooves 33 b, a uniform outer diameter is formed in accordance with the inner diameter of the transport passage 35. In this example, when the linear resin molded body 10 having an outer diameter D1 of 2.2 mm passes through the sizing device 33, the outer diameter (indicated by reference numeral D2) is uniformized to 1.80 mm in the transport direction. .

  In the cooling step, the linear resin molded body 10 having an outer diameter (indicated by reference symbol D2) of 1.80 mm is cooled by passing through the air cooling tank 37, and the outer diameter (indicated by reference symbol D) of the linear resin molded body 10 is decreased. ) Is reduced to 1.75 mm.

  In the dimension measuring step, the outer diameter of the linear resin molded body 10 is measured to determine whether or not the measured value is an appropriate size. In this example, it is determined whether or not the outer diameter of the linear resin molded body 10 is within a predetermined standard width centered on 1.75 mm. When the outer diameter of the linear resin molded body 10 is outside the range of the standard width, each manufacturing condition is reviewed so that the outer diameter is within the range of the standard width.

  In the winding process, when the outer diameter of the linear resin molded body 10 is within the range of the standard, the winding roller 43a of the winding device 43 is sent to the bobbin winding machine 43b, and the linear resin molding is applied to the winding shaft 43c. The continuous body 10 is wound up. When the linear resin molded body 10 having a predetermined length is wound around the winding shaft 43c, the linear resin molded body 10 is wound around the new winding shaft 43c.

  Since the linear resin molded body 10 manufactured by the above manufacturing line is vacuum-sucked by the sizing device 33, the linear resin molded body 10 has a constant wire diameter and a cross-sectional shape close to a perfect circle. By using it as a raw material, it is possible to realize highly accurate modeling.

  Hereinafter, specific examples of the method for producing a linear resin molded body to which the present invention is applied will be described based on experimental results.

Example 1
Using the manufacturing apparatus described above, a linear resin molded body in which three linear reinforcing portions were formed at equiangular intervals (120 ° intervals) on the outer peripheral surface of the core portion was produced. The core material is made of styrene elastomer (Kuraray, trade name Arneston JS20N), and the material of the filament reinforcement is water-soluble polyvinyl alcohol (Nippon Vinegar-Poval) , Trade name JP-05) was used.

Example 2
Using the manufacturing apparatus described above, a linear resin molded body in which three linear reinforcing portions were formed at equiangular intervals (120 ° intervals) on the outer peripheral surface of the core portion was produced. As the material of the core part, styrene elastomer (trade name Arneston JS20N, manufactured by Kuraray Co., Ltd.) is used, and as the material of the filament reinforcing part, soluble polyamide soluble in alcohol (trade name: CM4000, manufactured by Toray Industries, Inc.). ) Was used.

Comparative Example 1
Using the manufacturing apparatus described above, a linear resin molded body in which three linear reinforcing portions were formed at equiangular intervals (120 ° intervals) on the outer peripheral surface of the core portion was produced. As the material for the core part and the linear reinforcing part, styrene elastomer (manufactured by Kuraray Co., Ltd., trade name Arneston JS20N) was used.

When the linear resin moldings produced in Evaluation Examples 1 and 2 were used as filaments and a three-dimensional shaped article was produced with a molten resin lamination type 3D printer, modeling was possible easily, and then linear By dissolving and removing the reinforcing portion, it was possible to obtain a highly flexible model. On the other hand, the linear resin molded body produced in Comparative Example 1 could not be sent out as a modeling material by a 3D printer, and a modeled object could not be obtained.

  As is clear from this evaluation result, by providing a linear reinforcing portion, a wire that can be easily shaped with a 3D printer and that can obtain a highly flexible shaped object that could not be obtained conventionally. It is possible to realize a strip resin molded body, and by using this as a raw material for a three-dimensional object, for example, modeling with higher functionality can be realized.

DESCRIPTION OF SYMBOLS 10 Resin linear body 21 Core material part 22 Linear reinforcement part 30 Production line 31 Extruder 32 Mold 32A, 32B, 32C Mold member 33 Sizing device 37 Air cooling tank 42 Outer dimension measuring device 43 Winding device N1, N2 , N3 Central channel CR Annular channel Y1, Y2, Y3 Radiation channel

Claims (8)

A linear resin molded body used in a hot melt lamination type 3D printer,
A core part containing a thermoplastic elastomer;
A line having one or more linear reinforcing portions formed of a material different from the core material portion on a part of the outer peripheral surface of the core material portion and extending along a longitudinal direction of the core material portion. Strip resin molding.   The linear resin molded article according to claim 1, wherein the linear reinforcing part includes a thermoplastic resin material that can be dissolved and removed with water or an organic solvent.   The linear resin molded body according to claim 1 or 2, wherein the linear reinforcing portion has a rigidity greater than that of the core member.   The thermoplastic elastomer that constitutes the core material portion is a styrene-based elastomer, and the material that constitutes the linear reinforcing portion is polyvinyl alcohol or polyamide. Linear resin molding.   The said linear reinforcement part is formed in multiple places on the outer peripheral surface of the said core part at equal angular intervals, The filament resin molding of any one of Claim 1 to 4 characterized by the above-mentioned.   The said linear reinforcement part is formed in three places on the outer peripheral surface of the said core part at equal angular intervals, The filament resin molding of Claim 5 characterized by the above-mentioned. In a method for modeling a three-dimensional object by a hot melt lamination type 3D printer,
A core material portion including a thermoplastic elastomer, and at least one or more of the core material portion formed of a thermoplastic resin material different from the core material portion and extending along a longitudinal direction of the core material portion. Using a linear resin molded body having a linear reinforcing part as a modeling material,
A method for forming a three-dimensional object, comprising: melting and extruding the linear resin molded body, forming a three-dimensional object by laminating and stacking the linear resin molded body, and then dissolving and removing the linear reinforcing portion with an organic solvent. A method for producing a linear resin molded body used in a hot melt lamination type 3D printer,
The melted and kneaded thermoplastic elastomer is continuously extruded from the extruder, and a thermoplastic resin material different from the core material portion is supplied to the outer peripheral surface of the extruded core material portion so as to join together. One or more linear reinforcement parts extended along a longitudinal direction are formed, The manufacturing method of the linear resin molded object characterized by the above-mentioned.

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