WO2016121796A1 - Dispensing head, three-dimensional fabrication device, and three-dimensional fabrication method - Google Patents

Abstract

The purpose of the present invention is to provide: a dispensing head with which a solid filament is stably fed even when a solid filament obtained from an elastomer material is used, the dispensing head therefore being able to stably discharge a thermally fused polymer material; as well as a three-dimensional fabrication device and three-dimensional fabrication method using said dispensing head. This dispensing head, which is used in a three-dimensional fabrication device for manufacturing three-dimensional shapes by thermal fusion lamination, is characterized in being provided with: a material-supplying means for supplying a solid filament obtained from a thermally-fusible polymer material; a heating means for thermally fusing the solid filament supplied by the material-supplying means; and a material-discharging means for discharging the fused polymer material obtained as a result of the solid filament being heated by the heating means.

Description

Dispensing head, 3D modeling apparatus and 3D modeling method

The present invention relates to a dispensing head used in a three-dimensional modeling apparatus for producing a three-dimensional object by a hot melt lamination method, a three-dimensional modeling apparatus and a three-dimensional modeling method using this dispensing head.

As one of three-dimensional modeling methods for producing a three-dimensional object, a thermal melting lamination method is known. As a three-dimensional modeling apparatus using this hot-melt lamination method, one using a solid filament made of a thermoplastic resin such as an ABS resin or a PLA resin as a modeling material is known (for example, see Patent Document 1).
Such a three-dimensional modeling apparatus has a three-dimensionally movable dispense head. The dispense head includes a material supply unit that supplies a solid filament, and a heating unit that thermally melts the solid filament supplied by the material supply unit. And a material discharge means having an orifice for discharging a molten thermoplastic resin. The material supply means is composed of a drive roller mechanism that pinches and feeds the solid filament. This drive roller mechanism is composed of a drive roller that is rotationally driven by an appropriate drive source, and a support roller that is disposed opposite the drive roller. The surface of the drive roller is subjected to, for example, flat knurling in order to prevent or suppress slippage with the solid filament (see Patent Document 2 and Patent Document 3).

In such a three-dimensional modeling apparatus, the solid filament is supplied to the heating means by being sandwiched and fed between the drive roller and the support roller in the material supply means of the dispense head. In this heating means, the solid filament is heated to form a molten thermoplastic resin. The molten thermoplastic resin is extruded in the form of a strand from the orifice of the material discharge means toward the forming stage by being extruded by the subsequent solid filament. Then, the dispense head moves according to a preset pattern, whereby a required three-dimensional shape is produced on the molding stage.

However, it has been found that the above three-dimensional modeling apparatus has the following problems when an elastomer material is used as the solid filament.
Elastomer materials are soft and easily deformable at room temperature. Therefore, when a solid filament made of an elastomer material is sandwiched between the driving roller and the support roller in the material supply means, the solid filament has irregularities corresponding to irregularities caused by knurling applied to the surface of the driving roller. Is formed. And when unevenness | corrugation is formed in a solid filament, since the bending strength of the recessed part will fall, the said solid filament will buckle in the recessed part. As a result, the solid filament cannot be stably supplied, and therefore it is difficult to obtain a required three-dimensional shape.

Special table 2003-534149 gazette Japanese Patent Publication No. 8-2598 JP 2010-521339

An object of the present invention is to provide a dispensing head in which a solid filament made of an elastomeric material is used, so that the solid filament is stably supplied, and thus a thermally melted polymer material can be stably discharged. Another object of the present invention is to provide a three-dimensional modeling apparatus and a three-dimensional modeling method using the dispensing head.

The dispense head of the present invention is a dispense head used in a three-dimensional modeling apparatus for producing a three-dimensional object by a hot melt lamination method,
A material supply means for supplying a solid filament made of a heat-meltable polymer material;
Heating means for thermally melting the solid filament supplied by the material supply means;
And a material discharge means for discharging the polymer material in a molten state obtained by heating the solid filament by the heating means.

In the dispensing head of the present invention, the material supply means is constituted by a driving roller mechanism that pinches and feeds the solid filament, and the driving roller mechanism is arranged along the feeding direction of the solid filament. It is preferable to include one or more rollers, and a guide belt stretched between the rollers so as to contact the solid filament.

In the dispensing head of the present invention, the material supply means is constituted by a drive roller mechanism that sandwiches and feeds out the solid filament, and the drive roller mechanism includes a roller disposed so as to contact the solid filament. It is preferable that a notch forming portion for forming a notch extending in the longitudinal direction of the solid filament is provided on the peripheral surface of the roller.

In the dispensing head of the present invention, it is constituted by a driving roller mechanism that pinches and feeds out the solid filament, and the driving roller mechanism includes a roller arranged so as to contact the solid filament, It is preferable that the roller main body and a rubber ring member arranged along the peripheral surface of the roller main body and extending along the peripheral surface of the roller main body are disposed on the peripheral surface of the roller main body.

In the dispense head of the present invention, it is preferable that the heating means includes a heating plate having a through hole extending in the thickness direction through which the solid filament passes.
The distance from the end of the material supply means to the heating means is preferably 10 to 30 mm.
Moreover, it is preferable that at least one of a heat insulation means and a cooling means is provided between the material supply means and the heating means.

A three-dimensional modeling apparatus of the present invention includes the above-described dispense head, a moving unit that moves the dispense head three-dimensionally according to a preset pattern, and a control unit that controls a material supply unit in the dispense head. It is characterized by becoming.

In the three-dimensional modeling method of the present invention, the above molding head is three-dimensionally moved according to a preset pattern, and the molten polymer material is discharged from the dispensing head toward the molding stage, thereby forming the molding. A three-dimensional object is produced on a stage.
The three-dimensional modeling method of the present invention is suitable when the polymer material is an elastomer material.

According to the present invention, even when a solid filament made of an elastomer material is used, the solid filament is stably supplied, and therefore, the thermally melted polymer material can be stably discharged.

It is explanatory drawing which shows the structure in an example of the dispense head of this invention. It is explanatory drawing which shows the structure in the other example of the dispense head of this invention. FIG. 3 is an explanatory cross-sectional view illustrating a configuration of a main part of a drive roller mechanism in the dispense head illustrated in FIG. 2. It is explanatory drawing which shows the structure in the further another example of the dispense head of this invention. FIG. 5 is an explanatory cross-sectional view showing a configuration of a main part of a drive roller mechanism in the dispense head shown in FIG. It is sectional drawing for description which shows the solid filament in which the notch was formed. It is explanatory drawing which shows the outline of a structure in an example of the three-dimensional modeling apparatus of this invention.

Embodiments of the present invention will be described below.
FIG. 1 is an explanatory diagram showing a configuration of an example of a dispensing head according to the present invention. The dispense head 10 is mounted on a three-dimensional modeling apparatus for modeling a solid filament F made of a heat-meltable polymer material by a hot-melt laminating method to produce a three-dimensional object.

As the solid filament F that is a modeling material for producing a three-dimensional object, a linear filament having a diameter of, for example, 1.75 to 3 mm is used.
As the polymer material constituting the solid filament F, a heat-meltable resin material or an elastomer material can be used, and the dispense head 10 of the present invention is suitable particularly when an elastomer material is used.
Specific examples of the resin material include thermoplastic resins such as ABS resin and PLA resin.
Specific examples of the elastomer material include thermoplastic elastomers such as diene thermoplastic elastomer, styrene thermoplastic elastomer, olefin thermoplastic elastomer, vinyl chloride thermoplastic elastomer, urethane thermoplastic elastomer, and amide thermoplastic elastomer. Can be mentioned.

Dispensing head 10 has material supply means 11 for supplying solid filament F. The material supply means 11 is constituted by a drive roller mechanism that pinches and feeds the solid filament F. In this example, the drive roller mechanism is arranged between the drive roller 12a and the return roller 12b, and the drive roller 12a and the return roller 12b, which are arranged along the feeding direction of the solid filament F and rotated by an appropriate drive source. An endless guide belt 13 stretched to be in contact with the filament F, and two support rollers 14a arranged to be in contact with the solid filament F so as to face each of the drive roller 12a and the return roller 12b via the guide belt 13 , 14b. The peripheral surfaces of the support rollers 14a and 14b that are in contact with the solid filament F and the surface of the guide belt 13 are both smooth surfaces that are not knurled.

In the guide belt 13, the length in the feeding direction in the region in contact with the solid filament F is preferably 20 to 40 mm.
The gap distance between the guide belt 13 and the support rollers 14a and 14b is 0.1 to 0.8 times the diameter of the solid filament F.
As the material constituting the guide belt 13, polyurethane elastomer or the like can be used, and as the reinforcing material, glass fiber, aramid fiber or the like can be used.
As a material constituting the support rollers 14a and 14b in contact with the solid filament F, stainless steel, sintered metal, polyamide, polyacetal (POM), polytetrafluoroethylene (PTFE) can be used for the rotating shaft of the rotating portion. In addition, as the contact part with the filament of the rotating part, nitrile rubber (NBR), fluorine rubber (FKM, FFKM), ethylene propylene rubber (EPDM), chloroprene rubber (CR), hydrogenated nitrile rubber (HNBR), urethane Rubber or the like can be used.

Below the material supply means 11, a heating means 20 for thermally melting the solid filament F supplied by the material supply means 11 is provided. The heating means 20 in this example is constituted by a metal heating plate 21 having a through hole 22 extending in the thickness direction through which the solid filament F passes.
By using the heating plate 21 as the heating means 20, the heating range in the longitudinal direction with respect to the solid filament F is reduced. Therefore, the pressing force by the subsequent solid filament F can be sufficiently applied to the molten polymer material, and as a result, the molten polymer material is discharged from the orifice 32 of the material discharge means 30 described later. It can discharge reliably.
The thickness of the heating plate 21 is preferably 0.1 to 3 mm. When this thickness is excessive, the heating range in the longitudinal direction with respect to the solid filament F is large, so that the pressing force by the subsequent solid filament F does not sufficiently act on the molten polymer material, and the molten state It may be difficult to reliably discharge the polymer material from the orifice 32 of the material discharge means 30.
The inner diameter of the through hole 22 of the heating plate 21 is 1.1 to 1.2 times the diameter of the solid filament F, for example.

Further, the distance from the end of the material supply means 11 to the heating means 20 is preferably 10 to 30 mm. If this distance is in the above range, the solid filament F can be reliably prevented from buckling. When this distance is too small, the solid filament F may be softened by the heat from the heating unit 20 in the material supply unit 11. On the other hand, if this distance is excessive, buckling of the solid filament F may easily occur between the material supply unit 10 and the heating unit 20.

Between the material supply means 11 and the heating means 20, a cylindrical heat insulating member 25 having a cylindrical hole 26 for guiding the solid filament F is provided.
The inner diameter of the cylindrical hole 26 of the heat insulating member 25 is 1.1 to 1.2 times the diameter of the solid filament F, for example. The inner diameter of the cylindrical hole 26 of the heat insulating member 25 is preferably larger than the inner diameter of the through hole 22 of the heating plate 21, for example, 1.1 to 1.2 times the inner diameter of the through hole 22 of the heating plate 21. It is.
The material constituting the heat insulating member 25 is polyphenylene sulfide (PPS), liquid crystal poly-poly (LCP), polyarylate (PAR), polyethersulfone (PES), polyetherimide (PEI), polyetheretherketone (PEEK). Polyamide (PA), polyacetal (POM), polybutylene terephthalate (PBT), polytetrafluoroethylene (PTFE), and the like can be used.
By providing such a heat insulating member 25, it is possible to prevent or suppress the heat from the heating means 20 from being transmitted to the subsequent solid filament F. As a result, the solid filament F can be prevented or suppressed from being softened or melted, and thus the solid filament F can be reliably prevented from buckling.

On the lower surface of the heating plate 21, there is provided a material discharge means 30 for discharging a molten polymer material obtained by heating the solid filament F by the heating means 20. The material discharge means 30 in this example includes a material flow path 31 through which a molten polymer material obtained by heating the solid filament F flows, and a high melt state formed in communication with the material flow path 31. It is constituted by a metal nozzle having an orifice 32 from which a molecular material is discharged. The material discharge means 30 is arranged on the lower surface of the heating plate 21 so that the material flow path 31 communicates with the through hole 22 of the heating plate 21 and the orifice 32 faces the horizontal molding stage S.
The inner diameter of the material flow path 31 in the material discharge means 30 is, for example, 1.05 to 1.1 times the diameter of the solid filament F.
Further, the inner diameter of the orifice 32 in the material discharge means 30 is, for example, 0.5 to 3 mm.

In the dispensing head 10 described above, the solid filament F is heated between the guide belt 13 and the support rollers 14a and 14b in the material supply means 11 and fed out through the cylindrical hole 26 of the heat insulating member 25. It is supplied to the through hole 22 of the heating plate 21 in the means 20. In the heating means 20, the solid filament F is heated by the heating plate 21, whereby a molten polymer material is formed. Then, the molten polymer material is extruded by the subsequent solid filament F, and is discharged from the orifice 32 in a strand shape via the material flow path 31 of the material discharge means 30.
In the above, the heating temperature of the solid filament F by the heating means 20 is appropriately set according to the material of the solid filament F, but is usually 140 to 180 ° C.
Further, the discharge amount of the polymer material discharged from the orifice 32 of the material discharge means 30 is, for example, 400 to 5000 mm ³ / min.

According to such a dispense head 10, since the drive roller mechanism constituting the material supply means 11 has the guide belt 13, the contact area with the solid filament F in the drive roller mechanism is considerably increased. As a result, even if the peripheral surfaces of the support rollers 14a and 14b that are in contact with the solid filament F and the surface of the guide belt 13 are smooth surfaces that are not subjected to knurling, the slip of the solid filament F in the material supply means 11 is prevented. Can be prevented or suppressed. Since it is not necessary to knurle the peripheral surfaces of the support rollers 14 a and 14 b and the surface of the guide belt 13, when the solid filament F is supplied by the material supply unit 11, the solid filament F has irregularities. It is avoided that it is formed. For this reason, even if it is a case where what consists of an elastomer material is used as the solid filament F, the solid filament F does not buckle. As a result, the solid filament F is stably supplied, and accordingly, the polymer material melted by heat can be stably discharged.

FIG. 2 is an explanatory diagram showing the configuration of another example of the dispensing head of the present invention. The dispense head 10 has the same configuration as the dispense head 10 shown in FIG. 1 except for the configuration of the material supply means 11.

The material supply means 11 in the dispensing head 10 is constituted by a drive roller mechanism that pinches and feeds the solid filament F. The drive roller mechanism of this example is configured by a drive roller 15 and a support roller 18 which are arranged to face each other through the solid filament F and are rotated by an appropriate drive source. . As shown also in FIG. 3, the drive roller 15 includes a roller body 16 and two rubber-like ring members 17 each having a circular cross section provided on the circumferential surface of the roller body 16. More specifically, the circumferential surface of the roller body 16 is formed with two grooves 16a and 16b extending in the circumferential direction and spaced apart from each other in the axial direction. Each of the rubber ring members 17 is fixed to the grooves 16a and 16b of the roller body 16 so as to extend along the peripheral surface of the roller body 16 and be spaced apart from each other in the axial direction of the roller body 16. ing.

The diameter of the cross section of the rubber ring member 17 is, for example, 1.0 to 2.0 mm.
The protruding height of the rubber-like ring member 17 from the surface of the roller body 16 is, for example, 0.5 to 1.0 mm.
Examples of the material constituting the rubber-like ring member 17 include nitrile rubber (NBR), fluorine rubber (FKM, FFKM), ethylene propylene rubber (EPDM), chloroprene rubber (CR), hydrogenated nitrile rubber (HNBR), urethane rubber, and the like. Can be used.

In the dispensing head 10 described above, the solid filament F is sandwiched between the rubber-like ring member 17 of the driving roller 15 and the support roller 18 in the material supply unit 11 and fed out, so that the cylindrical hole 26 of the heat insulating member 25 is provided. To the through hole 22 of the heating plate 21 in the heating means 20. In the heating means 20, the solid filament F is heated by the heating plate 21, whereby a molten polymer material is formed. Then, the molten polymer material is extruded by the subsequent solid filament F, and is discharged from the orifice 32 in a strand shape via the material flow path 31 of the material discharge means 30.

According to such a dispense head 10, the drive roller 15 constituting the material supply means 11 is provided with the rubber-like ring member 17 extending along the peripheral surface thereof. The friction force is considerably increased. Thereby, even if the peripheral surface of the roller main body 16 of the drive roller 15 and the peripheral surface of the support roller 18 are smooth surfaces not subjected to knurling, the slip of the solid filament F in the material supply means 11 is prevented or suppressed. can do. Since it is not necessary to knurling the peripheral surface of the roller body 16 and the peripheral surface of the support roller 18 of the driving roller 15, when the solid filament F is supplied by the material supply unit 11, the solid filament F It is avoided that irregularities are formed on the surface. For this reason, even if it is a case where what consists of an elastomer material is used as the solid filament F, the solid filament F does not buckle. As a result, the solid filament F is stably supplied, and accordingly, the polymer material melted by heat can be stably discharged.

FIG. 4 is an explanatory diagram showing the configuration of still another example of the dispensing head of the present invention. The dispense head 10 has the same configuration as the dispense head 10 shown in FIG. 1 except for the configuration of the material supply means 11.

The material supply means 11 in the dispensing head 10 is constituted by a drive roller mechanism that pinches and feeds the solid filament F. The drive roller mechanism of this example is configured by a drive roller 15 and a support roller 18 which are arranged to face each other through the solid filament F and are rotated by an appropriate drive source. . As shown also in FIG. 5, the drive roller 15 includes a roller body 16 and two rubber-like ring members 17 each having a circular cross section provided on the peripheral surface of the roller body 16. More specifically, the circumferential surface of the roller body 16 is formed with two grooves 16a and 16b extending in the circumferential direction and spaced apart from each other in the axial direction. Each of the rubber ring members 17 is fixed to the grooves 16a and 16b of the roller body 16 so as to extend along the peripheral surface of the roller body 16 and be spaced apart from each other in the axial direction of the roller body 16. ing. The rubber-like ring member 17 has the same configuration as that of the rubber-like ring member 17 in the material supply means 11 shown in FIGS.

On each of the peripheral surface of the drive roller 15 and the peripheral surface of the support roller 18, notch forming portions 16 c and 18 c that form notches extending in the longitudinal direction of the solid filament F are provided. Specifically, in the drive roller 15, a notch forming portion 16c having a triangular cross section is formed between the two grooves 16a and 16b of the roller body 16. Further, the support roller 18 is formed with two V-shaped grooves 18a and 18b extending in the circumferential direction adjacent to each other on the peripheral surface thereof, so that a notch forming portion 18c having a triangular cross section is formed. Is formed.
The height of the protrusions forming the notch forming portions 16c and 18c is, for example, 0.1 to 0.4 times the diameter of the solid filament F.
The width of the protrusion constituting the notch forming portions 16c and 18c is, for example, 0.1 to 0.4 times the diameter of the solid filament F.
The angle of the top of the ridge constituting the notch forming portions 16c, 18c is, for example, 30 to 90 °.

In the dispensing head 10 described above, the solid filament F is sandwiched between the drive roller 15 and the support roller 18 in the material supply unit 11 and fed out, so that the heating unit 20 is passed through the cylindrical hole 26 of the heat insulating member 25. Is supplied to the through hole 22 of the heating plate 21. At this time, the solid filament F is pressed against each of the notch forming portion 16c of the roller main body 16 and the notch forming portion 18c of the support roller 18 in the driving roller 15, so that the solid filament F has a shape as shown in FIG. A notch N extending in the longitudinal direction (direction perpendicular to the paper surface in FIG. 6) is formed. In the heating means 20, the solid filament F is heated by the heating plate 21, whereby a molten polymer material is formed. Then, the molten polymer material is extruded by the subsequent solid filament F, and is discharged from the orifice 32 in a strand shape via the material flow path 31 of the material discharge means 30.

According to such a dispense head 10, the notch N extending in the longitudinal direction is formed in the solid filament F by the notch forming portions 16 c and 18 c provided in the driving roller 15 and the support roller 18 in the material supply unit 11. The Thereby, the cross-sectional secondary moment in the clamping direction (left and right direction in FIG. 6) by the material supply means 11 in the solid filament F increases. Therefore, even when the solid filament F is made of an elastomer material, the solid filament F can be reliably prevented from buckling. As a result, the solid filament F is stably supplied, and accordingly, the polymer material melted by heat can be stably discharged.
Further, since the drive roller 15 constituting the material supply means 11 is provided with the rubber-like ring member 17 extending along the peripheral surface thereof, the frictional force on the solid filament F in the drive roller 15 is considerably increased. Thereby, even if the peripheral surface of the roller main body 16 of the drive roller 15 and the peripheral surface of the support roller 18 are smooth surfaces not subjected to knurling, the slip of the solid filament F in the material supply means 11 is prevented or suppressed. can do.

FIG. 7 is an explanatory diagram showing an outline of a configuration in an example of the three-dimensional modeling apparatus of the present invention. The three-dimensional modeling apparatus includes a material holding reel 40 around which a solid filament F made of a heat-meltable polymer material is wound, a dispense head 10 that melts and discharges the solid filament F, and moves the dispense head 10. And a control unit 50 for controlling the material supplying unit 11 and the moving unit 45 in the dispensing head 10.
The dispensing head 10 has the configuration shown in FIG. 1, FIG. 2, or FIG.
The moving means 45 moves the dispense head 10 three-dimensionally, that is, moves in the surface direction (x direction and y direction) and the vertical direction (z direction) with respect to the molding stage S.
The control means 50 controls the drive roller (not shown) in the material supply means 11 to adjust the discharge amount of the polymer material discharged from the material discharge means 30, and the dispense head follows a preset pattern. The moving means 45 is controlled so as to move three-dimensionally.

In the three-dimensional modeling apparatus, the solid filament F held on the material holding reel 40 is supplied to the heating unit 20 by the material supply unit 11 of the dispense head 10 and is heated by the heating unit 20. Thereby, the solid filament F is melted to form a molten polymer material, and this polymer material is discharged from the orifice (not shown) of the material discharge exposing means 30 toward the molding stage S. Further, the dispensing head 10 is moved three-dimensionally according to a preset pattern by the moving means 45. As a result, a three-dimensional object formed by laminating a large number of polymer material layers on the molding stage S is produced.
In the above, the moving speed of the dispensing head 10 by the moving means 45 is, for example, 10 to 200 mm / min.
The thickness of the polymer material layer constituting the three-dimensional object is, for example, 0.2 to 1.5 mm.

According to such a three-dimensional modeling apparatus, since the dispense head 10 capable of stably discharging the hot-melt polymer material is provided, a required three-dimensional object can be reliably produced.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications such as the following can be added.
(1) In the dispensing head 10, the heat insulating member 25 provided between the material supply unit 11 and the heating unit 20 is not essential. Further, a cylindrical cooling member having a cylindrical hole for guiding the solid filament F may be provided between the material supply unit 11 and the heating unit 20 instead of the heat insulating member 25. Both of the members may be provided.
(2) The heating means 20 is not limited to the one having the heating plate 21, and various forms can be adopted.
(3) In the dispensing head 10 shown in FIG. 1, a notch extending in the longitudinal direction is formed in the solid filament F on one or both of the surface of the guide belt 13 and the peripheral surface of the support roller 14a or the support roller 14b. A notch forming portion may be provided.
(4) In the dispense head 10 shown in FIGS. 4 and 5, only one of the drive roller 15 and the support roller 18 may be provided with a notch forming portion.
Alternatively, the drive roller 15 may be composed only of a roller body having a flat knurled peripheral surface.

DESCRIPTION OF SYMBOLS 10 Dispense head 11 Material supply means 12a Drive roller 12b Return roller 13 Guide belt 14a, 14b Support roller 15 Drive roller 16 Roller body 16a, 16b Groove 16c Notch formation part 17 Rubber-like ring member 18 Support roller 18a, 18b Groove 18c Notch formation Section 20 Heating means 21 Heating plate 22 Through hole 25 Heat insulating member 26 Tube hole 30 Material discharge means 31 Material flow path 32 Orifice 40 Material holding reel 45 Moving means 50 Control means F Solid filament N Notch S Molding stage

Claims (10)

1. A dispensing head used in a three-dimensional modeling apparatus for producing a three-dimensional object by a hot melt lamination method,
   A material supply means for supplying a solid filament made of a heat-meltable polymer material;
   Heating means for thermally melting the solid filament supplied by the material supply means;
   A dispensing head comprising: a material discharge means for discharging the polymer material in a molten state obtained by heating the solid filament by the heating means.
2. The material supply means is configured by a drive roller mechanism that pinches and feeds the solid filament, and the drive roller mechanism includes two or more rollers arranged along the feed direction of the solid filament, and these The dispensing head according to claim 1, further comprising a guide belt stretched between the rollers so as to be in contact with the solid filament.
3. The material supply means includes a drive roller mechanism that sandwiches and feeds out the solid filament, and the drive roller mechanism includes a roller disposed so as to be in contact with the solid filament, on a peripheral surface of the roller. The dispensing head according to claim 1, wherein the solid filament is provided with a notch forming portion for forming a notch extending in a longitudinal direction thereof.
4. The material supply means includes a drive roller mechanism that sandwiches and feeds out the solid filament, and the drive roller mechanism includes a roller disposed in contact with the solid filament, and the roller includes a roller body. And a rubber-like ring member arranged on the peripheral surface of the roller body so as to be in contact with the solid filament, and extending along the peripheral surface of the roller body. Dispensing head according to crab.
5. The dispensing head according to any one of claims 1 to 4, wherein the heating means includes a heating plate having a through hole extending in a thickness direction through which the solid filament passes.
6. The dispensing head according to claim 5, wherein the distance from the end of the material supply means to the heating means is 10 to 30 mm.
7. The dispensing head according to any one of claims 1 to 6, wherein at least one of a heat insulating means and a cooling means is provided between the material supply means and the heating means.
8. A dispensing head according to any one of claims 1 to 7, a moving means for moving the dispensing head three-dimensionally according to a preset pattern, and a control means for controlling a material supply means in the dispensing head. 3D modeling apparatus characterized by comprising.
9. While the dispensing head according to any one of claims 1 to 7 is moved three-dimensionally according to a preset pattern, the molten polymer material is discharged from the dispensing head toward the molding stage. A three-dimensional modeling method characterized by producing a three-dimensional object on the molding stage.
10. The three-dimensional modeling method according to claim 8, wherein the polymer material is an elastomer material.

Images