KR101762667B1 - A filament feeding apparatus for 3D printer - Google Patents

A filament feeding apparatus for 3D printer Download PDF

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Publication number
KR101762667B1
KR101762667B1 KR1020160023655A KR20160023655A KR101762667B1 KR 101762667 B1 KR101762667 B1 KR 101762667B1 KR 1020160023655 A KR1020160023655 A KR 1020160023655A KR 20160023655 A KR20160023655 A KR 20160023655A KR 101762667 B1 KR101762667 B1 KR 101762667B1
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KR
South Korea
Prior art keywords
filament
driving roller
roller
heating block
printer
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KR1020160023655A
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Korean (ko)
Inventor
조훈제
조인제
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조훈제
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Priority to KR1020160023655A priority Critical patent/KR101762667B1/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

Abstract

The present invention relates to a filament supply device for a 3D printer. A filament supply device for a 3D printer according to an embodiment of the present invention includes a first driving roller for moving an introduced filament in a first direction and a second driving roller for separating the filament from the first driving roller, And a heating block which is installed between the first driving roller and the second driving roller and heats the filament, the filament is drawn in the first direction in the heating block, The thickness of the filament discharged from the second driving roller may be smaller than the thickness of the filament flowing into the first driving roller.

Figure R1020160023655

Description

[0001] The present invention relates to a filament feeding apparatus for a 3D printer,

The present invention relates to a device, and more particularly to a filament supply device for a 3D printer.

Three-dimensional printing is an additive manufacturing method for manufacturing three-dimensional solid objects through an additive method as opposed to a subtractive manufacturing method in which three-dimensional objects are produced by cutting or shaving materials. There are various stacking methods for three-dimensional printing, and the materials used for three-dimensional printing are also very diverse such as polymers, metals, paper, wood, and foodstuffs.

One of the methods of three-dimensional printing is to melt a filament of a solid material and transform it into a liquid phase to laminate. Typically, the filaments are wound around a drum and stored, and the filaments are loosened and then flowed into the nozzles and then melted and discharged.

The filament can be deformed while being wound and stored for a long time, and even if the filament is loosened, the predetermined section becomes unstable. If the filament is bent, it may be difficult to load the nozzle into the nozzle, or the quality may not be constant because the heat transfer is not uniform in the nozzle. Therefore, there is a need for a process for improving the quality of the filament by deforming the bent filament before injecting into the nozzle and flowing it into the nozzle with a uniform thickness.

One aspect of the present invention is to provide a filament supply device for a 3D printer capable of maintaining a constant quality of a filament and performing a fine and precise 3D printing process.

According to an aspect of the present invention, there is provided a filament feeding device comprising a first driving roller for moving an introduced filament in a first direction, a second driving roller which is installed apart from the first driving roller and supplies the filament to a heat nozzle, And a heating block installed between the driving roller and the second driving roller for heating the filament, wherein the filament extends in the first direction in the heating block, and the filament And the thickness of the filament is smaller than the thickness of the filament flowing into the first driving roller.

The rotation speed of at least one of the first driving roller and the second driving roller may be set so that the linear velocity of the filament discharged from the second driving roller is greater than the linear velocity of the filament flowing into the first driving roller And a controller for controlling the controller.

The rotation speed of the second driving roller may be greater than the rotation speed of the first driving roller.

In addition, the heating block may heat the filament to a first temperature lower than the glass transition temperature of the filament.

The apparatus may further include a pressure roller disposed on at least one of the first driving roller and the second driving roller and pressing the filament.

Further, the pressure roller may move in a second direction different from the first direction.

According to another aspect of the present invention, there is provided a filament winding apparatus including a spool wound with a filament, a first driving roller for moving the filament unwound from the spool in a first direction, A heating block which is installed between the first driving roller and the second driving roller and which heats the filament to a first temperature and a heating block which heats the filament And a heat nozzle for heating the filament to a second temperature higher than the first temperature.

The thickness of the filament discharged from the second driving roller may be smaller than the thickness of the filament flowing into the first driving roller.

The rotation speed of at least one of the first driving roller and the second driving roller may be set so that the linear velocity of the filament discharged from the second driving roller is greater than the linear velocity of the filament flowing into the first driving roller And a controller for controlling the controller.

The filament supply device for 3D printer according to one embodiment of the present invention and the method of operating the same according to the present invention increase the flexibility of the filament by the heating block and quantitatively adjust the discharge amount of the liquid filament discharged from the heat nozzle, 3D printing can be done.

Further, in the filament supply device for a 3D printer and its operation method, the heating block can adjust the thickness of the filament. The flexible filament can be stretched in the first direction to adjust the thickness, and the filament can be injected into the heat nozzle by regulating the speed of the first driving roller and the second driving roller.

Further, in the filament supply device for a 3D printer and its operation method, since the heating block preheats the filament and melts the filament from the heat nozzle, the quality of the filament can be improved and the time for producing the final product can be shortened.

1 is a conceptual diagram showing a filament supply device for a 3D printer according to an embodiment of the present invention.
Fig. 2 is a configuration diagram showing the configuration of the filament supply device for the 3D printer shown in Fig. 1. Fig.
3 is a conceptual diagram showing a filament supply device for a 3D printer according to another embodiment of the present invention.
Fig. 4 is a block diagram showing a method of operating the filament supply device for 3D printer shown in Fig. 1. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

FIG. 1 is a conceptual diagram showing a filament supply device 1 for a 3D printer according to an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a filament supply device 1 for a 3D printer shown in FIG.

1 and 2, a filament supply device 1 for a 3D printer includes a spool 10, a heat nozzle 20, a controller 30, a first driving roller 110, a second driving roller 120, A heating block 130, a first pressure roller 140, and a second pressure roller 150. [ The filament supply device 1 for the 3D printer can supply the filament F wound on the spool 10 to the heat nozzle 20. [

The spool 10 is wound with a filament F as a raw material for 3D printing. The filaments F are piled up in the spool 10 and bent to a predetermined range. Since the filament F is stored in the spool 10 for a long time, even if loosened, the filament F is at least partially bent. The heat nozzle 20 melts the filament F to produce a product.

The first driving roller 110, the second driving roller 120 and the heating block 130 are installed between the spool 10 and the heat nozzle 20 to stretch the filaments F to increase the thickness of the filaments F Can be adjusted. Further, the filaments F can be made flexible, and the bent filaments F can be unfolded. The bent filament F can be deformed into a linear shape.

The first driving roller 110 may be fed with the filament F released from the spool 10. The first driving roller 110 can move the filament F in the first direction. The second driving roller 120 may be disposed apart from the first driving roller 110 and may move the filament F to the heat nozzle 20.

The first driving roller 110 and the second driving roller 120 may be connected to a driving unit (not shown) and rotated. The first drive roller 110 and the second drive roller 120 are connected to the drive unit to receive power or the first drive roller 110 and the second drive roller 120 are connected to one drive unit, . The first rotation speed of the first driving roller 110 and the second rotation speed of the second driving roller 120 may be controlled by the controller 30. [

In detail, the linear velocity of the filament F discharged from the second driving roller 120 can be controlled by the controller 30 to be greater than the linear velocity of the filament F flowing into the first driving roller 110 . Since the filament F is drawn by the heating block 130, the filament F must have a higher discharge speed than the inflow speed.

 The first rotation speed V1 of the first drive roller 110 may be smaller than the second rotation speed V2 of the second drive roller 120. [ The linear velocity of the filament F flowing into the first driving roller 110 is higher than the linear velocity of the filament F discharged from the second driving roller 120 because the second rotational speed V2 is larger than the first rotational speed V1, The line speed can be reduced. That is, even if the sizes of the first driving roller 110 and the second driving roller 120 are similar, the controller 30 adjusts the rotational speeds of the first driving roller 110 and the second driving roller 120, The discharge speed can be made larger than the inflow speed of the filament.

The heating block 130 may be installed between the first driving roller 110 and the second driving roller 120. The heating block 130 applies heat to the moving filament F to make the filament F flexible. The heating block 130 may transfer heat to the filament F at a first temperature. The first temperature may be defined as a temperature lower than the glass transition temperature (Tg) of the filament (F). Since the temperature applied by the heating block 130 is lower than the glass transition temperature Tg, the filament F can be deformed to have a predetermined flexibility.

The heating block 130 generates heat to transfer heat to the filament F, and the shape and configuration of the heating block 130 are not limited to a specific shape or configuration. Hereinafter, for the sake of convenience, the heating block 130 will be described mainly with a housing 131, a first power source 132, and a first heating line 133. FIG.

The heating block 130 is connected to the controller 30 so that whether or not the first power source 132 is applied can be controlled. The controller 30 can adjust the first temperature.

The heating block 130 stretches the filament F and the second thickness d2 of the filament discharged from the second driving roller 120 is greater than the second thickness d2 of the filament F flowing into the first driving roller 110 It can be made thinner than the thickness d1. The filament F is deformed by the heating block 130 and can be stretched in the first direction due to the speed difference between the first driving roller 110 and the second driving roller 120. [ Therefore, the filament passing through the heating block 130 may be thin.

The first pressure roller 140 may be installed above the first driving roller 110. The filament F may flow into the heating block 130 through the gap between the first driving roller 110 and the first pressure roller 140. [ The first pressurizing roller 140 can move in the second direction so that the gap between the first drive roller 110 and the first pressurizing roller 140 can be adjusted.

The first pressing roller 140 may include a first pressing portion 141 and a first linear moving portion 142. The first pressing portion 141 is a portion in contact with the filament F and can be rotatably installed. The first linear moving part 142 may be connected to the first pressing part 141 at one side and the other side may be supported at another side.

The first pressing roller 140 may be connected to the controller 30 and the controller 30 may move the first linear moving part 142 in the second direction so that the first driving roller 110 and the first pressing roller 140 can be adjusted.

The second pressure roller 150 may be disposed above the second driving roller 120 and may control the gap between the second pressure roller 150 and the second driving roller 120. The second pressing roller 150 may include a second pressing portion 151 and a second linear moving portion 152. Since the second pressing portion 151 and the second linear moving portion 152 are the same as or similar to the first pressing portion 141 and the first linear moving portion 142 of the first pressing roller 140, It will be omitted.

The second pressing roller 150 may be connected to the controller 30 and the controller 30 moves the second linear moving part 152 in the second direction so that the second driving roller 120 and the second pressing roller 150 can be adjusted.

The controller 130 receives data on the thickness of the filament F from the third sensor 173 and the fourth sensor 174 and calculates the positions of the first pressing roller 140 and the second pressing roller 150 The thickness of the filament F can be adjusted.

The filament supply device 1 for a 3D printer may have a plurality of sensors. The filament supply device 1 for a 3D printer may include sensors for measuring the moving speed of the filament F and sensors for measuring the thickness of the filament F. [

The first sensor 171 may be installed at the inlet end of the first driving roller 110 to measure the inflow speed of the filament F and the second sensor 172 may measure the inflow speed of the filament F, And the discharge speed of the filament F can be measured at the outlet end.

The third sensor 173 is installed at the inlet end of the first driving roller 110 and is installed at the inlet end of the first driving roller 110 to measure the first thickness d1 of the filament F have. The fourth sensor 174 can measure the second thickness of the filament F that is installed at the outlet end of the second driving roller 120 and is discharged from the second driving roller 120.

The controller 30 is connected to the first sensor 171 through the fourth sensor 174 so as to control the thickness of the filament F or the discharge speed. In detail, the controller 30 may be electrically connected to the first sensor 171 or the second sensor 172 to monitor the moving speed of the filament F in the first direction. Based on the received data, The driving speed of the first driving roller 110 and the rotating speed of the second driving roller 120 can be controlled.

The controller 30 may be electrically connected to the third sensor 173 or the fourth sensor 174 to monitor the thickness of the filament F. Based on the received data, (130).

The heat nozzle 20 may include a nozzle body 21 and a heating part 22. The heating unit 22 may include a second power source 22a and a second heating line 22b. The heat nozzle 20 is charged with the filament F discharged from the second driving roller 120 and can receive heat by the heating part 22 to melt.

The heating section 22 can heat the filament F to the second temperature. The second temperature may be defined as the temperature above the glass transition temperature (Tg). The filament F is melted by the heating section 22 and discharged from the nozzle body 21 to produce an output product on the base plate 5. [

The first guide roller 51 may be installed at the entrance end of the first drive roller 110. The first guide roller 51 can guide the bent filament F to the first driving roller 110. [ The second guide roller 52 may be installed at the outlet end of the second driving roller 120. The second guide roller 52 can guide the discharged filament F to the heat nozzle 20.

 3 is a conceptual diagram showing a filament supply device 1 for a 3D printer according to another embodiment of the present invention.

3, the filament supply device for a 3D printer includes a first driving roller 210, a second driving roller 220, a heating block 230, a first pressing roller 240, a second pressing roller 250, A rotary shaft 261, and a joint portion 262. [ The first driving roller 210, the second driving roller 220, the heating block 230, the first pressing roller 240 and the second pressing roller 250 are connected to the filament feeding device for 3D printer of the embodiment of the present invention, The first driving roller 110, the second driving roller 120, the heating block 130, the first pressing roller 140, and the second pressing roller 150 of the image forming apparatus 1, Or omitted.

The third radius R3 of the first driving roller 210 may be smaller than the fourth radius R4 of the second driving roller 220. [ The third radius R3 of the first driving roller 210 is smaller than the fourth radius R4 of the second driving roller 220 and the first driving roller 210 and the second driving roller 220 rotate in the same rotation The linear velocity of the filament F flowing into the first driving roller 210 may be smaller than the linear velocity of the filament F discharged from the second driving roller 220. [ That is, the inflow speed and the discharge speed of the filament F can be adjusted by adjusting the sizes of the first driving roller 210 and the second driving roller 220.

The first driving roller 210 and the second driving roller 220 may be connected by a rotating shaft 261. The rotary shaft 261 may be connected to a driving unit (not shown) to receive driving force. The rotating shaft 261 simultaneously transmits the driving force to the first driving roller 210 and the second driving roller 220 and the driving force of the first driving roller 210 and the second driving roller 220 Deflection or cutting of the filament F can be prevented. Also. The volume of the filament supply device for the 3D printer can be minimized by minimizing the driving part and minimizing the distance between the first driving roller 210 and the second driving roller 220. [

The rotary shaft 261 can be detachably installed by the joint portion 262. The joint portion 262 may include a plurality of gear modules (not shown) to adjust the rotational speed of the first driving roller 210 and the rotational speed of the second driving roller 220.

Fig. 4 is a block diagram showing a method of operating the filament supply device 1 for 3D printer shown in Fig.

4, a method of manufacturing a final product using the filament supply device 1 for a 3D printer includes a step of introducing the filament F wound on the spool 10 into the first driving roller 110 A step S30 in which the drawn filament F is discharged from the second driving roller 120 and a step S30 in which the heating nozzle blows the filament F to the filament F, To a second temperature (S40).

 The filament F wound on the spool 10 flows into the first driving roller 110 and the filament F is unwound from the spool 10 to be charged into the first driving roller 110 have. Since the filament F is wound around the spool 10, even if loosened, the predetermined section can be deformed to be curved. The first pressing roller 140 disposed on the upper side of the first driving roller 110 presses the filament F with a predetermined force to deform the filament F linearly.

The heating block 130 heating the filament to the first temperature may heat the filament F to the first temperature to flexibly deform the filament F. [ The first temperature is lower than the glass transition temperature (Tg) of the filament (F), and the filament is not melted but can be made flexible enough to be stretched.

The step S30 in which the drawn filament F is discharged from the second driving roller 120 can be performed by stretching the filament F. [ The filament F that has been softened by the heating block 130 can be stretched due to the speed difference between the first driving roller 110 and the second driving roller 120. [

The step S40 of the heat nozzle 20 heating the filament F to the second temperature may melt the filament F flowing into the heat nozzle 20. [ The second temperature is a temperature equal to or higher than the glass transition temperature Tg of the filament F so that the filament F melts and can be discharged from the heat nozzle 20.

The filament supply device 1 for a 3D printer and the operation method thereof can easily adjust the filament F by increasing the flexibility of the filament F by the heating block 130. [ The heating block 130 can increase the flexibility of the filament F by heating the filament F to a temperature lower than the glass transition temperature Tg. The filament F can be easily loaded into the heat nozzle 20 and the liquid discharge amount of the filament F discharged from the heat nozzle 20 can be easily adjusted to produce a finely finished product .

The filament supply device 1 for the 3D printer and its operation method are used for adjusting the thickness of the filament F by the heating block 130. The flexible filament F is stretched in the first direction to adjust the thickness and the filament F is injected into the heat nozzle 20 by adjusting the speed of the first driving roller 110 and the second driving roller 120 can do.

The filament supply device 1 for a 3D printer and the method of operating the filament F of the present invention are characterized in that the heating block 130 preheats the filament F and melts the filament F from the heat nozzle 20, The quality of the finished product can be improved and the time for producing the final product can be reduced. The filament F is preheated to have a predetermined flexibility by the heating block 130, and can be quickly melted in the heat nozzle 20. In addition, since the filament F melts after being preheated by the heat nozzle 20, the temperature distribution of the liquid filament F can be uniformly formed, and the quality of the filament F can be improved.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover all such modifications and variations as fall within the true spirit of the invention.

1: Filament feeding device for 3D printer
10: spool
20: Heat nozzle
30: Controller
110: first drive roller
120: second drive roller
130: Heating block
140: first pressure roller
150: second pressure roller
261:
262: joint part

Claims (9)

A first driving roller for moving the introduced filament in a first direction;
A second driving roller installed apart from the first driving roller and supplying the filament to a heat nozzle;
A heating block installed between the first driving roller and the second driving roller for heating the filament to a first temperature lower than a glass transition temperature of the filament; And
And a heat nozzle for introducing the filament discharged from the second driving roller and heating the filament to a second temperature higher than the glass transition temperature,
Wherein the filament is drawn in the first direction in the heating block and the thickness of the filament discharged from the second driving roller is smaller than the thickness of the filament flowing into the first driving roller, Wherein the filament is in a liquid state. The method according to claim 1,
And controls the rotation speed of at least one of the first driving roller and the second driving roller so that the linear velocity of the filament discharged from the second driving roller is larger than the linear velocity of the filament flowing into the first driving roller Further comprising a controller for controlling the feeding of the filament. 3. The method of claim 2,
And the rotational speed of the second driving roller is larger than the rotational speed of the first driving roller. delete The method according to claim 1,
Further comprising: a pressure roller disposed above the at least one of the first driving roller and the second driving roller, for pressing the filament. 6. The method of claim 5,
And the pressure roller moves in a second direction different from the first direction.
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KR1020160023655A 2016-02-26 2016-02-26 A filament feeding apparatus for 3D printer KR101762667B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190036466A (en) * 2017-09-27 2019-04-04 더 보잉 컴파니 Reconfigurable nozzle for material deposition
KR20190059513A (en) 2017-11-23 2019-05-31 백진수 A brush having cutting edge and manufacturing method for the brush
US10828698B2 (en) * 2016-12-06 2020-11-10 Markforged, Inc. Additive manufacturing with heat-flexed material feeding
US11173550B2 (en) 2016-12-02 2021-11-16 Markforged, Inc. Supports for sintering additively manufactured parts
US20220072774A1 (en) * 2018-12-19 2022-03-10 Jabil Inc. Apparatus, system and method for enhanced drive force in an additive manufacturing print head

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11173550B2 (en) 2016-12-02 2021-11-16 Markforged, Inc. Supports for sintering additively manufactured parts
US10828698B2 (en) * 2016-12-06 2020-11-10 Markforged, Inc. Additive manufacturing with heat-flexed material feeding
KR20190036466A (en) * 2017-09-27 2019-04-04 더 보잉 컴파니 Reconfigurable nozzle for material deposition
KR102609986B1 (en) * 2017-09-27 2023-12-04 더 보잉 컴파니 Reconfigurable nozzle for material deposition
KR20190059513A (en) 2017-11-23 2019-05-31 백진수 A brush having cutting edge and manufacturing method for the brush
US20220072774A1 (en) * 2018-12-19 2022-03-10 Jabil Inc. Apparatus, system and method for enhanced drive force in an additive manufacturing print head

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