KR20170062965A - Heating nozzle structure for 3D printer - Google Patents

Heating nozzle structure for 3D printer Download PDF

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Publication number
KR20170062965A
KR20170062965A KR1020150168805A KR20150168805A KR20170062965A KR 20170062965 A KR20170062965 A KR 20170062965A KR 1020150168805 A KR1020150168805 A KR 1020150168805A KR 20150168805 A KR20150168805 A KR 20150168805A KR 20170062965 A KR20170062965 A KR 20170062965A
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KR
South Korea
Prior art keywords
nozzle
filament
diameter portion
printer
heat sink
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KR1020150168805A
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Korean (ko)
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KR101772563B1 (en
Inventor
강지훈
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주식회사 포머스팜
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Priority to KR1020150168805A priority Critical patent/KR101772563B1/en
Publication of KR20170062965A publication Critical patent/KR20170062965A/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)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

[0001] The present invention relates to a heating nozzle structure for a 3D printer, and more particularly, to a nozzle structure for a 3D printer. More particularly, the present invention relates to a heating nozzle structure for a 3D printer including a nozzle having a discharge hole formed therein with a small- And a guide pipe coupled to an upper portion of the heat sink, wherein the small diameter portion of the nozzle is formed to be longer than the large diameter portion, and a diameter smaller than an inner diameter of the guide pipe is formed in the center of the heat sink, And a vacuum-forming sealing ring having a through hole having a through-hole formed therein is inserted into the nozzle, thereby generating a vacuum suction force in the nozzle during the retraction operation of the filament to effectively prevent the melted filament from flowing down. It is a heating nozzle structure for 3D printer which can completely solve defective molding caused by flowing down. One will.

Description

[0001] Heating nozzle structure for 3D printer [0002]

[0001] The present invention relates to a heating nozzle structure for a 3D printer, and more particularly, to a nozzle structure for a 3D printer. More particularly, the present invention relates to a heating nozzle structure for a 3D printer including a nozzle having a discharge hole formed therein with a small- And a guide pipe coupled to an upper portion of the heat sink, wherein the small diameter portion of the nozzle is formed to be longer than the large diameter portion, and a diameter smaller than an inner diameter of the guide pipe is formed in the center of the heat sink, And a vacuum-forming sealing ring having a through hole having a through-hole formed therein is inserted into the nozzle, thereby generating a vacuum suction force in the nozzle during the retraction operation of the filament to effectively prevent the melted filament from flowing down. It is a heating nozzle structure for 3D printer which can completely solve defective molding caused by flowing down. One will.

Recently, the use of 3D printers capable of forming three-dimensional objects has been increasing. In the 3D printer, there is a method of forming a photographed portion into an object by injecting a laser beam to a photo-curable material according to a product molding method, A method of cutting and molding, and a method of melting and laminating a thermoplastic filament.

As shown in FIG. 1, the 3D printer 30 of the FFF (Fused Filament Fabrication) type, in which the thermoplastic filaments in the form of a wire are melted and laminated as shown in FIG. 1, It is widely used for domestic and industrial use due to its low production cost.

The FFF type 3D printer 30 is essentially provided with a heating nozzle for melting and extruding the thermoplastic filament. The heating nozzle for the conventional 3D printer has a small diameter portion 22a as shown in FIG. 2, A heater block 23 coupled to an upper portion of the nozzle 21 and a nozzle hole 22 formed at an upper portion of the heater block 23, And a guide pipe 25 coupled to an upper portion of the heat sink 24. The heat sink 24 is connected to the heat sink 24 and the heat sink 24,

In the conventional heating nozzle 20 for a 3D printer constructed as described above, the filament 7, which is press-fitted through the guide tube 25, is melted by the heater 23a provided in the heater block 23, Through the discharge hole 22 of the discharge port 22.

However, in the conventional heating nozzle 20 for a 3D printer as described above, the melted filaments 7a in the nozzle 21 move to the discharge hole 22 every time the nozzle is moved from the stopped state to the other position So that the surface of the printout becomes dirty or a molding defect occurs in a severe case.

In order to solve such a problem, conventionally, the filament 7 supplied to the heating nozzle 20 is disposed opposite to the heating nozzle 20 so that the melted filament 7a does not flow down every time the heating nozzle 20 moves from the stopped state to the other position. The tension applied to the filament 7 in the solid state even when the filament 7 is pulled in the opposite direction during the retraction operation is the molten filament 7a So that the defective molding due to the flow of the melted filament 7a can not be completely solved.

Korean Patent Publication No. 10-2015-0116585

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide an ink jet recording head comprising: a nozzle having a discharge hole formed therein with a small diameter portion and a large diameter portion formed therein; a heater block coupled to an upper portion of the nozzle; And a guide pipe coupled to an upper portion of the heat sink. The small diameter portion of the nozzle is formed to be longer than the large diameter portion. Inside the heat sink, a through hole having a diameter smaller than the inner diameter of the guide pipe A vacuum suction force is generated in the nozzle during the retraction operation of the filament, thereby effectively preventing the flow of the molten filament, so that the molten filament flows downward So that it is possible to completely solve the defective molding.

According to an aspect of the present invention, there is provided an ink jet recording head comprising: a nozzle having a discharge hole formed therein having a small diameter portion and a large diameter portion formed therein; a heater block coupled to an upper portion of the nozzle; A heating nozzle structure for a 3D printer, comprising: a heat sink; and a guide pipe coupled to an upper portion of the heat sink, wherein a small diameter portion of the nozzle is formed to be longer than a large diameter portion, And a vacuum-forming sealing ring in which a through hole having a diameter smaller than the inner diameter of the tube is formed.

Further, the present invention is characterized in that the length of the small diameter portion formed in the nozzle is 3 to 30 mm.

According to the heating nozzle structure for a 3D printer according to the present invention configured as described above, vacuum suction force is generated in the nozzle during the retraction operation of the filament to prevent the melted filament from flowing down, It is possible to completely solve the defective molding due to the flow of the liquid.

1 is a perspective view showing a conventional 3D printer.
2 is a sectional view showing the structure of a conventional heating nozzle for a 3D printer.
3 is a perspective view showing the appearance of a heating nozzle for a 3D printer according to the present invention.
4 is an exploded perspective view showing a structure of a heating nozzle for a 3D printer according to the present invention.
FIG. 5 is a sectional view showing an assembly state of a heating nozzle for a 3D printer according to the present invention; FIG.
6 (a) and 6 (b) are explanatory diagrams showing an operation process of a heating nozzle for a 3D printer according to the present invention;
7 (a) and 7 (b) are explanatory diagrams showing the operation principle of a heating nozzle for a 3D printer according to the present invention;

Hereinafter, the present invention will be described in detail with reference to FIG. 3 to FIG. 7. FIG.

3 to 5, the heating nozzle for a 3D printer according to the present invention includes a nozzle 1, a heater block 3, a heat sink 4, a guide tube 5, a vacuum forming sealing ring 6).

The nozzle 1 has a discharge hole 2 formed by a small diameter portion 2a and a large diameter portion 2b through which the melted filament is discharged to the outside while the diameter of the melted filament is reduced. The large diameter portion 2b of the molten filament 7a is a portion into which the molten filament 7a flows into the nozzle 1 and the small diameter portion 2a is a portion where the molten filament 7a is discharged in a reduced diameter state to be.

In the heating nozzle 10 for a 3D printer according to the present invention, the length of the small diameter portion 2a is longer than the diameter of the large diameter portion 2b because the filament is retracted in the heat sink 4 The molten filament 7a in the small diameter portion 2a is completely sucked into the large diameter portion 2b side when a vacuum suction force is generated inside the nozzle 1 by the vacuum forming sealing ring 6 inserted therein .

That is, in the heating nozzle 10 for a 3D printer according to the present invention, the heating nozzle 10 is supplied to the heating nozzle 10 so that the molten filament 7a does not flow down every time the heating nozzle 10 moves from the stopped state to the other position A vacuum suction force is generated inside the nozzle 1 by the vacuum forming sealing ring 6 inserted into the heat sink 4 during a retraction operation in which the filament 7 is pulled in the opposite direction The molten filament 7a in the small diameter portion 2a is sucked into the large diameter portion 2b side at this time so that the melted filament 7a in the small diameter portion 2a is sucked to the large diameter portion 2b side The small diameter portion 2a is opened to the outside and the outside air is sucked into the nozzle 1 through the opened small diameter portion 2a. When external air flows into the nozzle 1, the melted filament 7a is blown out when it is discharged.

However, if the length of the small-diameter portion 2a is longer than the diameter of the large-diameter portion 2b, the amount of molten filament 7a larger than the amount sucked into the large-diameter portion 2b by the vacuum suction force, Only a part of the melted filament 7a in the small diameter portion 2a is sucked into the large diameter portion 2b side and the remaining part of the molten filament 7a in the small diameter portion 2b is sucked into the large diameter portion 2b even if vacuum suction force is generated in the nozzle 1 during the retraction operation of the filament, So that it is possible to maintain the closed state of the small diameter portion 2a so as to prevent the outside air from flowing into the inside of the nozzle 1. [

It is preferable that the length d of the small diameter portion 2a formed in the nozzle 1 is 3 to 30 mm because the length of the small diameter portion 2a when the length of the small diameter portion 2a is less than 3 mm A sufficient amount of melted filaments 7a can not stay in the inside of the nozzle 1 during the retraction operation of the filament, and when the length of the small diameter portion 2a exceeds 30 mm Since the vacuum suction force generated inside the nozzle 1 during the retraction operation of the filament can not reach the distal end of the small diameter portion 2a, the effect of preventing the flow-down due to the vacuum suction force is remarkably lowered.

The heater block 3 is coupled to an upper portion of the nozzle 1 and includes a heater 3a for melting the filament 7 therein.

The heat sink 4 is connected to the nozzle 1 at an upper portion of the heater block 3 and has a tubular body connecting the nozzle 1 and the guide tube 5, The radiating fins 4a of the radiator 4 are formed.

The heat sink 4 dissipates the heat transferred from the heater block 3 to the outside and preheats the filament 7 inserted into the nozzle 1 through the guide tube 5.

The guide tube 5 is coupled to an upper portion of the heat sink 4 and serves to guide the filament 7 which is press-fitted into the nozzle 1.

The vacuum forming sealing ring 6 is inserted into the heat sink 4 and a through hole 6a having a smaller diameter than the inner diameter of the guide pipe 5 is formed at the center.

Since the vacuum-forming sealing ring 6 serves as a packing for keeping the inside of the nozzle 1 in a vacuum state, it can be manufactured using a conventional sealing material for airtightness. Among them, It is preferable to have a resilient enough to be firmly adhered and to be made of a heat-resistant silicone material so as to withstand the heat transmitted from the heater block 3.

The reason why the diameter of the through hole 6a of the sealing ring 6 for vacuum formation is smaller than the inner diameter of the guide tube 5 is that the filament 7 in a preheated state is tightly fitted, So that a vacuum state can be effectively formed inside the nozzle 1 during the traction operation.

For example, when a filament having a diameter of 1.75 mm is used, the inner diameter of the guide tube 5 is formed to be 2 mm so that the filament can pass smoothly. The diameter of the through hole 6a of the vacuum forming sealing ring 6 The filament 7 having a diameter of 1.75 mm is tightly fitted into the through hole 6a of the sealing ring 6 for vacuum formation so that the retraction action of the filament A vacuum state can be effectively formed inside the nozzle 1.

The operation of the heating nozzle for 3D printer according to the present invention will now be described.

6 (a), when the filament 7 is press-fitted into the heating nozzle 10 for a 3D printer of the present invention, the filament 7, which is press-fitted through the guide tube 5, After passing through the through hole 6a of the vacuum forming sealing ring 6 inserted into the inside of the heater block 4 and then melted in the liquid state by the heater 3a provided inside the heater block 3, Is introduced into the large-diameter portion 2b of the discharge hole 22 and then discharged through the small-diameter portion 2a while being reduced in diameter.

Subsequently, as shown in FIG. 6 (B), a retraction operation for pulling the filament 7 supplied to the heating nozzle 10 in the opposite direction in a state in which the discharge of the heating nozzle 10 is stopped is performed The filaments 7 tightly fitted in the through holes 6a of the vacuum forming sealing ring 6 inserted into the heat sink 4 are vacuumed in the nozzle 1 A part of the molten filament 7a in the small diameter portion 2a is sucked toward the large diameter portion 2b and the melted filament 7a Can be effectively prevented from flowing downward.

7 (a), when the piston 42 is retracted while the leading end of the piston syringe 40 is immersed in the water tray 43, a vacuum state is formed inside the syringe body 41 And the water 44 of the water tank 43 is sucked into the syringe body 41 due to the vacuum suction force.

According to the heating nozzle structure for a 3D printer according to the present invention, the vacuum suction force is generated in the nozzle during the retraction operation of the filament, thereby effectively preventing the melted filament from flowing down. Therefore, It is possible to completely solve the defective molding due to the flow-down of the filament.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention

1: Nozzle
2: Discharge ball
2a: Small neck
2b:
3: Heater block
3a: Heater
4: Heatsink
4a: heat sink fin
5: Guide tube
6: Sealing ring for vacuum forming
6a: Through hole
7: filament
7a: melted filament
10: Heating nozzle

Claims (2)

A nozzle having a discharge hole formed therein having a small diameter portion and a large diameter portion,
A heater block coupled to an upper portion of the nozzle,
A heat sink connected to the nozzle at an upper portion of the heater block,
And a guide pipe coupled to an upper portion of the heat sink,
The small diameter portion of the nozzle is longer than the large diameter portion,
And a vacuum forming sealing ring having a through hole having a diameter smaller than an inner diameter of the guide tube is inserted in the center of the heat sink. The heating nozzle structure for a 3D printer according to claim 1, wherein a length of the small diameter portion formed in the nozzle is 3 to 30 mm.
KR1020150168805A 2015-11-30 2015-11-30 Heating nozzle structure for 3D printer KR101772563B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150168805A KR101772563B1 (en) 2015-11-30 2015-11-30 Heating nozzle structure for 3D printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150168805A KR101772563B1 (en) 2015-11-30 2015-11-30 Heating nozzle structure for 3D printer

Publications (2)

Publication Number Publication Date
KR20170062965A true KR20170062965A (en) 2017-06-08
KR101772563B1 KR101772563B1 (en) 2017-08-30

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101884420B1 (en) * 2018-03-21 2018-08-01 서경진 Nozzle heat dissipation unit of 3D printer using thermosyphon and manufacturing method thereof
KR20200110190A (en) * 2019-03-14 2020-09-23 주식회사 쓰리디컨트롤즈 A control method for three dimensional printing apparatus using stick-type ceramic material
KR20200110191A (en) * 2019-03-14 2020-09-23 주식회사 쓰리디컨트롤즈 A three dimensional printing apparatus using ceramic material
KR20200115721A (en) * 2019-03-14 2020-10-08 주식회사 쓰리디컨트롤즈 Three dimensional printing apparatus using stick-type metal and ceramic material and precision extrusion control method thereof
US10919221B2 (en) 2017-10-03 2021-02-16 Jabil Inc. Apparatus, system and method for an additive manufacturing print head
US11458683B2 (en) 2017-10-03 2022-10-04 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11485088B2 (en) 2017-10-03 2022-11-01 Jabil Inc. Apparatus, system and method of process monitoring and control in an additive manufacturing environment
KR102623703B1 (en) * 2022-12-26 2024-01-12 주식회사 클리셀 Bioprinters and Control Methods
WO2024101526A1 (en) * 2022-11-11 2024-05-16 주식회사 티앤알바이오팹 3d printer head using local heating method

Families Citing this family (1)

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KR102055434B1 (en) * 2019-05-02 2019-12-12 (주)쓰리디테크놀로지 A 3D printer nozzle system with increased cooling

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US10391695B2 (en) * 2014-04-11 2019-08-27 Brian L. Douglass Retracting extruder barrel with cooling features

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11654630B2 (en) 2017-10-03 2023-05-23 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11878468B2 (en) 2017-10-03 2024-01-23 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11485088B2 (en) 2017-10-03 2022-11-01 Jabil Inc. Apparatus, system and method of process monitoring and control in an additive manufacturing environment
US11969948B2 (en) 2017-10-03 2024-04-30 Jabil Inc. Apparatus, system and method of process monitoring and control in an additive manufacturing environment
US10919221B2 (en) 2017-10-03 2021-02-16 Jabil Inc. Apparatus, system and method for an additive manufacturing print head
US10919223B2 (en) 2017-10-03 2021-02-16 Jabil Inc. Apparatus, system and method for an additive manufacturing print head
US11420385B2 (en) 2017-10-03 2022-08-23 Jabil Inc. Apparatus, system and method for an additive manufacturing print head
US11584078B2 (en) 2017-10-03 2023-02-21 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11878469B2 (en) 2017-10-03 2024-01-23 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11872762B2 (en) 2017-10-03 2024-01-16 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11458683B2 (en) 2017-10-03 2022-10-04 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11840019B2 (en) 2017-10-03 2023-12-12 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11845223B2 (en) 2017-10-03 2023-12-19 Jabil Inc. Apparatus, system and method of operating an additive manufacturing nozzle
US11865778B2 (en) 2017-10-03 2024-01-09 Jabil Inc. Apparatus, system and method for an additive manufacturing print head
KR101884420B1 (en) * 2018-03-21 2018-08-01 서경진 Nozzle heat dissipation unit of 3D printer using thermosyphon and manufacturing method thereof
KR20200110190A (en) * 2019-03-14 2020-09-23 주식회사 쓰리디컨트롤즈 A control method for three dimensional printing apparatus using stick-type ceramic material
KR20200115721A (en) * 2019-03-14 2020-10-08 주식회사 쓰리디컨트롤즈 Three dimensional printing apparatus using stick-type metal and ceramic material and precision extrusion control method thereof
KR20200110191A (en) * 2019-03-14 2020-09-23 주식회사 쓰리디컨트롤즈 A three dimensional printing apparatus using ceramic material
WO2024101526A1 (en) * 2022-11-11 2024-05-16 주식회사 티앤알바이오팹 3d printer head using local heating method
KR102623703B1 (en) * 2022-12-26 2024-01-12 주식회사 클리셀 Bioprinters and Control Methods

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