KR20160142611A - Filament feeding nozzle for 3-dimension printer and the feeder having the same - Google Patents

Filament feeding nozzle for 3-dimension printer and the feeder having the same Download PDF

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Publication number
KR20160142611A
KR20160142611A KR1020150078562A KR20150078562A KR20160142611A KR 20160142611 A KR20160142611 A KR 20160142611A KR 1020150078562 A KR1020150078562 A KR 1020150078562A KR 20150078562 A KR20150078562 A KR 20150078562A KR 20160142611 A KR20160142611 A KR 20160142611A
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KR
South Korea
Prior art keywords
filament
nozzle
barrel
shape
hole
Prior art date
Application number
KR1020150078562A
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Korean (ko)
Inventor
백락준
Original Assignee
가톨릭관동대학교산학협력단
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Application filed by 가톨릭관동대학교산학협력단 filed Critical 가톨릭관동대학교산학협력단
Priority to KR1020150078562A priority Critical patent/KR20160142611A/en
Publication of KR20160142611A publication Critical patent/KR20160142611A/en

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    • B29C67/0085—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)

Abstract

The present invention relates to a filament supply nozzle for a 3D printer and a filament supply device including the filament supply nozzle. The nozzle for discharging the filament is formed along the central axis direction, and the nozzle hole for discharging the filament is formed in the nozzle hole At least a part of the shape of the cross section is formed in a shape of a rectangle or a hexagon, which is cut in a direction perpendicular to the center axis direction.
According to the present invention, when a cross-sectional shape of a nozzle hole is formed in a quadrangular, hexagonal, or chamfered quadrangular or hexagonal shape, when the output is outputted through lamination of filaments, the lamination structure of filaments is made compact, Can be improved.

Description

Technical Field [0001] The present invention relates to a 3D printer filament supply nozzle and a feeder including the same,

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a filament supply nozzle for a 3D printer and a filament supply device including the filament supply nozzle, and more particularly, to a nozzle used in a 3D printer of FDM (Fused Deposition Modeling)

In general, three-dimensional printers that print and make products three-dimensional are liquid-based SLA (Stereolithography), powder-based SLS (Selective Laser Sintering) and solid-based FDM (Fused Deposition Modeling) .

Particularly, the FDM type three-dimensional printer 1 has a rectangular horizontal base frame 2 for supporting a basic structure and maintaining a stable state as shown in Fig. 1, and each edge portion The vertical frames 3a, 3b, 3c and 3d are fixed.

The front and rear guide rods 7 are connected to the upper parts of the vertical frames 3a and 3b and the upper and lower vertical frames 3c and 3d are equilibrated with the guide rods 7, (Not shown) of the electric motor 8 for forward / backward movement, which is provided with a forward / backward feed screw 6,

The conveying block 10 and the guide block 11 are installed on the front and rear conveying screws 6 and the front and rear guide rods 7 and connect the two blocks 10 and 11, 7 and a left / right feed screw 9 so as to be orthogonal to the front / rear feed screw 6.

The left / right feed screw 9 is provided with a left / right feeding motor 12 having an encoder (not shown). The printing head 13 for feeding the filaments 14 and 15 for making the product while rotating the left and right feed screw 9 by rotating the left and right feeding motor 12 is moved leftward and rightward Is installed.

The printing head 13 can be supplied with the filament 14 and the supporting filament 15 at the same time or can supply the filament 14 for the product to perform the stereoscopic printing.

The printing head 13 is provided with an extruder for feeding the filament and a heating unit for heating the filament at a melting point. The printing head 13 extrudes the filament in a heated state to enable three-dimensional output.

The present invention provides a filament feeding nozzle capable of increasing the density and durability of an output product by minimizing the supply of filaments for outputting a 3D output, and a filament feeding device including the same.

Further, the present invention provides a manufacturing method and a structure capable of facilitating the production of a filament supplying nozzle having nozzle holes of various sectional shapes.

The nozzle for discharging the filament is formed along the central axis direction, and the nozzle hole for discharging the filament is formed in the nozzle hole At least a part of the shape of the cross section is formed in a shape of a rectangle or a hexagon, which is cut in a direction perpendicular to the center axis direction.

In addition, the cross-sectional shape of the nozzle hole may be formed in a chamfered shape.

The nozzle may be formed by joining at least two nozzle parts along the central axis.

Further, the nozzle parts may be joined by a welding method.

On the other hand, the 3D printer filament supply device according to the present invention comprises a filament roll to which filaments are unwound; A barrel having a through-hole formed therethrough in a direction of a central axis so that a barrel supplied from the filament roll can pass therethrough; An extruder for pressurizing and supplying the filament to the barrel; A heating unit for heating the filament supplied through the barrel; And a nozzle for discharging filaments supplied through the barrel to the outside. At this time, the nozzle is formed with a nozzle hole which forms a continuous passage with a through hole of the barrel, and at least a part of the nozzle hole has a cross sectional shape in a shape of a rectangle or a hexagon.

In addition, the nozzle hole may have a discharge port having an inner diameter at least a part of which includes a distal end portion, the inner diameter being smaller than an inner diameter of a through hole of the barrel.

In addition, the cross-sectional shape of the discharge port may be formed in any one of a rectangular shape and a hexagonal shape.

Further, the cross-sectional shape of the discharge port may be formed in a chamfered shape.

The extruder further includes: a driving roll for contacting the filament and moving the filament by friction due to rotation; And a guide roll which is manually rotated by the friction between the filament moving by the driving roll.

And a heat dissipation unit disposed between the heating unit and the extruder and discharging heat to the outside through the barrel.

According to the present invention, when a cross-sectional shape of a nozzle hole is formed in a quadrangular, hexagonal, or chamfered quadrangular or hexagonal shape, when the output is output through lamination of filaments, the lamination structure of the filaments is made compact, Can be improved.

Also, according to the present invention, by forming the nozzles divided into at least two nozzle parts and bonding or joining them, it is possible to easily form the cross-sectional shape of the nozzle hole at the time of manufacturing the nozzle.

1 is a schematic perspective view showing a general 3D printer of the FDM type.
2 is a perspective view illustrating a filament supply apparatus according to an embodiment of the present invention.
Fig. 3 is a longitudinal sectional view showing a state of the filament supply device of Fig. 2;
4 is a bottom perspective view showing a state of the filament supply device of FIG.
5 is a schematic view showing a state of a nozzle hole according to various embodiments viewed from the bottom;
6 is a schematic diagram schematically showing a filament output using a conventional nozzle.
FIG. 7 is a schematic diagram illustrating a filament output using a nozzle according to an exemplary embodiment of the present invention. Referring to FIG.
8 is a perspective view showing a nozzle part used in a nozzle manufacturing method according to an embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the absence of special definitions or references, the terms used in this description are based on the conditions indicated in the drawings. The same reference numerals denote the same members throughout the embodiments. For the sake of convenience, the thicknesses and dimensions of the structures shown in the drawings may be exaggerated, and they do not mean that the dimensions and the proportions of the structures should be actually set.

The filament supply device according to one embodiment will be described with reference to FIGS. 2 to 5. FIG. FIG. 2 is a perspective view showing a filament feeding device according to an embodiment of the present invention, and FIG. 3 is a longitudinal sectional view showing a filament feeding device of FIG. FIG. 4 is a bottom perspective view showing a filament supply device of FIG. 2, and FIG. 5 is a schematic view showing a nozzle hole according to various embodiments viewed from the bottom.

2 and 3, the filament supply device according to an embodiment of the present invention includes a filament roll (not shown), a barrel 13, an extruder 15, a heating portion 12, and a nozzle 11 .

The filament roll is provided with a filament wound thereon to continuously supply the filament 20 to the filament supply device 10, and a general filament roll can be used.

The filament 20 is formed of a thermoplastic resin or a polymer material such as PLA, ABS, HDPE, polystyrene, nylon, and Resin, and is discharged and laminated in a molten state, cooled at room temperature, and output to the final output. As described above, the filament 20 can be used in a single feeding mode. In some cases, a support filament for supporting a product output in addition to a product output filament can be supplied together.

The extruder 15 functions to move the filament 20 by a predetermined force and pressurize and supply the filament 20 with a barrel 13 and a nozzle 11 to be described later.

The barrel 13 provides a path through which the filaments 20 move within the filament feeder 10. The barrel 13 is formed with a through-hole penetrating therethrough so that the filament 20 can move.

The heating unit 12 heats the filament 20 supplied through the barrel 13 to a melting point or higher. The nozzle 11 discharges the melted filament 20 to the outside. The filament 20a discharged to the outside is cooled and cured at room temperature and is converted to the final output product.

The main feature of the filament supply device 10 according to the present invention resides in the nozzle hole shape of the nozzle 11. [ This will be described in detail below.

Specifically, the extruder 15 is passed through the filament 20 in the longitudinal direction, and a driving roll 151 and a guide roll 152 are provided on both sides of the feeding path of the filament 20, respectively. The driving roll 151 rotates in contact with the filament 20 and provides a force to transfer the filament 20 by friction. The driving roll 151 preferably increases the surface roughness of the outer circumferential surface or increases the surface area of the outer circumferential surface such as the teeth in order to increase the frictional force with the filament 20. [

The guide roll 152 contacts the filament 20 to be conveyed and rotates as the filament 20 is fed. The guide roll 152 functions to guide the filament 20 to minimize the frictional force to prevent the transfer of the filament 20 although it can not provide a frictional force for transferring. That is, the filament 20 is conveyed by the rotation of the driving roll 151 in a state interposed between the driving roll 151 and the guide roll 152, and the maximum still frictional force and the kinetic frictional force So that the transfer can be made smoothly.

The heat radiating portion 14 is provided between the heating portion 12 and the extruder 15. The heat dissipating unit 14 is provided in contact with the barrel 13 to prevent the heat from being conducted to the extruder 15 side along the barrel 13. [ The heat dissipating portion 14 can use a commonly used method or structure. That is, it is formed of a material such as aluminum having a high heat transfer rate, and is formed in a structure to increase the surface area, so that heat is rapidly transferred from the barrel 13 and discharged to the outside. The heat dissipating unit 14 is overheated to prevent unwanted heat from being conducted to the extruder 15 side and to prevent the filament 20 from being heated unnecessarily.

2 and 3, the nozzle 11 has a nozzle hole 113 and a discharge port 111 formed in the longitudinal direction. The nozzle hole 113 forms a continuous path with a through-hole penetrating the central axis of the barrel 13 described above, so that the filament 20 can be transported. In addition, the discharge port 111 is a name that specifically reaches a portion where the background is reduced on the end side of the nozzle hole 113, and is a point through which the melted filament 20 finally passes.

At this time, the nozzle 11 according to an embodiment of the present invention has a rectangular cross section of the discharge port 111 and at least a part of the nozzle hole 113. When the discharge port 111 has a rectangular cross-sectional shape, the cross-sectional shape of the finally discharged filament 20a becomes a square.

In addition, as shown in FIG. 5, the discharge ports 111a and 111b may be formed in a shape having a chamfered cross section or in a hexagonal shape. When such a nozzle 11 is used, the cross-sectional shape of the finally discharged filament is a square, a hexagon, or a chamfered shape thereof.

Referring to FIGS. 6 and 7, an output output using a nozzle according to an embodiment of the present invention and an output output using a general nozzle will be described. FIG. 6 is a schematic view illustrating a filament output using a conventional nozzle, and FIG. 7 is a schematic diagram illustrating a filament output using a nozzle according to an exemplary embodiment of the present invention. Referring to FIG.

In general FDM type 3D printers, the nozzle has a circular cross-sectional shape. In the case of a general nozzle having such a circular nozzle hole, the frictional force between the nozzle hole and the filament is uniform, which is advantageous in the uniform discharge surface of the filament. However, as shown in FIG. 6, And the final output is inconsistent.

On the other hand, in the case of using the filament supply device using the nozzle according to the present invention, discharged filaments have a quadrangular shape in longitudinal section, and the filaments are in surface contact with each other, so that the lamination is easier and the final output is dense. The same effect can be obtained even in the case of a hexagon having a cross-sectional shape of the nozzle.

However, depending on the material of the filament, there is a possibility that the waste of the filament accumulates due to non-uniformity of frictional force between the nozzle hole and the filament at the edge portion of the nozzle hole according to the present invention. However, This problem can be minimized by forming a chamfered shape.

A method of manufacturing a nozzle according to an embodiment and a nozzle structure therefor will be described with reference to FIG. 8 is a perspective view showing a nozzle part used in a nozzle manufacturing method according to an embodiment.

The nozzle 11 according to the present invention needs to be formed in a rectangular, hexagonal, or chamfered rectangular or hexagonal shape in section, compared with a general case, so that the degree of difficulty in manufacturing increases.

The nozzle 11 according to the present embodiment can be formed in advance in the form of parts divided into two or more pieces by cutting in the longitudinal direction in the manufacturing step. In the case of forming the nozzle with the divided parts as described above, it is possible to form the nozzle hole with a more complicated shape by processing the nozzle hole in the divided state.

The nozzle parts formed in such a divided shape can be manufactured as one nozzle by joining and joining them by welding or the like.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. have.

10: filament feeder
11: Nozzle
12:
13: Barrel
14:
15: extruder
20: filament

Claims (10)

A nozzle for discharging a filament to be melted and extruded through an extruder and a heating unit to the outside,
Wherein the nozzle has a nozzle hole through which the filament is discharged along a central axis direction,
Wherein at least a part of the nozzle hole is formed in a shape of a rectangle or a hexagon, the cross-sectional shape being cut in a direction perpendicular to the central axis direction. The method according to claim 1,
Wherein the cross-sectional shape of the nozzle hole is formed in a chamfered shape. The method according to claim 1,
Wherein the nozzle is formed by joining at least two nozzle parts along the central axis. The method of claim 3,
Wherein the nozzle parts are joined by a welding method. Filament rolls from which filaments are drawn;
A barrel having a through-hole formed therethrough in a direction of a central axis so that a barrel supplied from the filament roll can pass therethrough;
An extruder for pressurizing and supplying the filament to the barrel;
A heating unit for heating the filament supplied through the barrel; And
And a nozzle for discharging filaments supplied through the barrel to the outside,
The nozzle
A nozzle hole forming a continuous passage with a through hole of the barrel is formed,
Wherein a cross sectional shape of at least a part of the nozzle holes is formed in a shape of a rectangle or a hexagon. 6. The method of claim 5,
Wherein the nozzle hole has a discharge port having an inner diameter at least a portion including an end portion and an inner diameter smaller than an inner diameter of a through hole of the barrel. The method according to claim 6,
Wherein the discharge port has a cross-sectional shape formed in any one of a quadrangular shape and a hexagonal shape. 8. The method of claim 7,
And the cross-sectional shape of the discharge port is formed in a chamfered shape. 6. The method of claim 5,
The extruder comprises:
A driving roll for contacting the filament and moving the filament by friction due to rotation; And
And a guide roll which is manually rotated by friction with the filament moving by the driving roll. 6. The method of claim 5,
And a heat dissipation unit provided between the heating unit and the extruder and discharging heat transmitted through the barrel to the outside.
KR1020150078562A 2015-06-03 2015-06-03 Filament feeding nozzle for 3-dimension printer and the feeder having the same KR20160142611A (en)

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Application Number Priority Date Filing Date Title
KR1020150078562A KR20160142611A (en) 2015-06-03 2015-06-03 Filament feeding nozzle for 3-dimension printer and the feeder having the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150078562A KR20160142611A (en) 2015-06-03 2015-06-03 Filament feeding nozzle for 3-dimension printer and the feeder having the same

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023163487A1 (en) * 2022-02-24 2023-08-31 주식회사 에코월드팜 3d bioprinter with rotary print head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023163487A1 (en) * 2022-02-24 2023-08-31 주식회사 에코월드팜 3d bioprinter with rotary print head

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