KR101664695B1 - 3D print thermostable rubber nozzle - Google Patents

3D print thermostable rubber nozzle Download PDF

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Publication number
KR101664695B1
KR101664695B1 KR1020150076586A KR20150076586A KR101664695B1 KR 101664695 B1 KR101664695 B1 KR 101664695B1 KR 1020150076586 A KR1020150076586 A KR 1020150076586A KR 20150076586 A KR20150076586 A KR 20150076586A KR 101664695 B1 KR101664695 B1 KR 101664695B1
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South Korea
Prior art keywords
nozzle
nozzle tip
tip
fixing cover
rubber
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KR1020150076586A
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Korean (ko)
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이정애
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이정애
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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 replaces a nozzle of a FFF (Fused Filament Fabrication) type three-dimensional printer with a heat resistant rubber nozzle,
Specifically, the heat resistant rubber nozzle 1 is composed of an inner nozzle 2, a nozzle tip 4, and a nozzle tip fixing cover 3,
The nozzle tip fixing cover 3 is made of a metal having a good thermal conductivity and has one end processed by a male thread and a hexagon under the nozzle tip fixing cover 3 so as to be attached to and detached from the heater block 7 using a tool And at the end, the nozzle tip 4 is fixed and protected so as to be concave, the center hole is made to be able to engage with the inner nozzle 2 inside,
The inner nozzle 2 is selected from a metal having a good thermal conductivity, and the nozzle tip inserting jaw 6 and the inner nozzle discharging opening 9 having a concave end are processed,
The nozzle tip 4 is formed by selecting one of a fluorine rubber, a silicone rubber and a synthetic resin having high heat resistance and high elasticity and non-tacky property to form the nozzle tip 4, and the injection tip of the nozzle tip 4, 5, or a group cut by a knife, a triangle, a + (quadrangle), a quadrilateral, a pentagon or a hexagon is selected and the processed nozzle tip 4 is inserted into the inner nozzle 2 is inserted up to the nozzle tip inserting jaw 6 and placed on the nozzle tip fixing cover 3 and pressed by a press to tightly engage the nozzle.
Since the material of the nozzle tip 4 is a synthetic rubber, unlike the conventional metal nozzle, the injection port 5 is extended or spread when the pressure inside the nozzle tip 4 is increased. When the motor is stopped, the injection port (5) is closed, and the non-adherent nozzle tip (4) cuts off the molten material to form a thin filament, so that the output is cleaned It is possible to obtain a precise output because the material can be over-injected or not overflowed, thereby reducing the post-processing time and improving the quality.

Figure 112015052222104-pat00001

Description

3D print thermostable rubber nozzle [0002]

The present invention

The present invention relates to a nozzle for extruding and laminating molten synthetic resin in a three-dimensional printer,

Specifically, the nozzle of the hot end is replaced with a heat resistant rubber nozzle having high heat resistance.

In particular, the nozzle tip of the high elasticity and heat resistant rubber nozzle is different from the metal nozzle, and the hole is not always pierced so that the melted material does not flow down. If the step motor is not operated, It is a heat-resistant rubber nozzle for a three-dimensional printer that produces clean prints and produces a clean, high-quality output without the formation of fine filaments due to non-tacky characteristics.

There are so many advantages of a three-dimensional printer of the FFF (Fused Filament Fabrication) method which is rapidly spreading recently.

However, many disadvantages are also true.

The disadvantage of overcoming the many advantages and becoming a stumbling block to its widespread use is that it is difficult for the output to be molded as it is, and time and effort must be paid to the post-processing.

In a FFF (Fused Filament Fabrication) type three-dimensional printer, hot-end is a nozzle and a heat block, and it is no exaggeration to say that it is the most important part.

However, the parts are simple, heating the end of the metal tube into which the filament is inserted, and making a narrow hole at the tip, but analyzing the nozzle is not a simple matter.

As the synthetic resin filament, which is the material of the output, receives heat, it expands as it melts and becomes stronger to the adhesive. In order to inject the filament, it is necessary to push the filament by the step motor so that it is difficult to finely control the injection amount. Since it is injected under pressure, it is slowed down to the reaction rate, resulting in a decrease in quality.

During the operation, the injection nozzle (injection port 5) of the metal nozzle for continuously discharging the synthetic resin filament is kept at a high temperature continuously. Therefore, when the injection is stopped during the operation, When you start working again, the molten material flows out and sticks to the printout as a lump.

To solve such a problem, when the injection is not performed for a while, the filament is pulled up to reduce the pressure of the nozzle.

However, since the pressure can not be precisely reduced, the length of the filament is not shortened or the filament is excessively pulled up and injected.

The nozzle with a small diameter is 0.2 mm in diameter and the relatively large one is only 0.8 mm. It is difficult to precisely raise the filament to match the melted material to the tip of the nozzle. However, since the temperature in the nozzle changes instantaneously and the volume changes with temperature, Making it even more difficult to match.

Therefore, it is a reality that the finished product is not clean and quality is poor.

So, if the printout is separated, it is polished and sanded by various tools, or it is post-processed by putting it in a machine that heats the solvent.

Korean Patent Publication No. 10-2015-0030453 (2015.03.20) Korean Registered Patent No. 10-1502342 (2015.03.09) Korean Patent No. 10-1451794 (October 10, 2014) Korean Patent No. 10-1430582 (Aug. 2014) Korean Patent No. 10-1346704 (December 24, 2013)

Title: Analysis of FDM (FFF) type 3D printer's hot-end (nozzle and heater block) structure analysis pointed out that the most important components in 3D printers are nozzles and heating devices, and nozzle design influences the quality of output . wakalics.blogspot.com 2015.0106

The present invention has been made to solve the above problems,

FFF (Fused Filament Fabrication) Method When a step motor for extruding filaments in a process of forming an output of a three-dimensional printer is stopped, molten material is immediately cut off, and very thin filaments are not generated, And is intended to obtain a clean printout that does not cause excessive or insufficient material in the printout.

In order to achieve the above object, the present invention is as follows.

The heat resistant rubber nozzle 1 is composed of an inner nozzle 2, a nozzle tip 4 and a nozzle tip fixing cover 3,

The nozzle tip 4 is formed by selecting one of fluorine rubber, silicone rubber and synthetic rubber having high elasticity, non-tackiness and high heat resistance, and the injection tip 5 of the nozzle tip 4 is pierced with a needle (3), (4), (5), (5), and (6) Is inserted into the nozzle tip inserting jaw (6) of the nozzle tip fixing cover (3), and then pressed on the nozzle tip fixing cover (3) and fixed firmly.

The present invention relates to a heat-resistant rubber nozzle (1) for a three-dimensional printer,

The nozzle tip 4 is formed and the injection port 5 is formed by selecting one of fluorine rubber, silicone rubber and synthetic rubber having high elasticity, non-tackiness and heat resistance, The heat resistant rubber nozzle 1 is inserted into the insert jaw 6 and then placed on the nozzle tip fixing cover 3 and pressed by a press to fix the heater rubber block 7 to the heater block 7.

When the filament is not extruded by a stepping motor during the molding of the output, the yarn outlet (injection port 5) formed by the high elasticity material is opened when the pressure is applied and the molten material in the nozzle does not flow down during stoppage. The exit (exit 5) is closed and the melted material is cut off due to the non-adhesive property, so that a thin filament is not produced, and the output is accurately realized, and the quality is improved.

1 is a perspective view showing a heat resistant rubber nozzle according to the present invention.
2 is a cross-sectional view of a heat-resistant rubber nozzle and a filament supply pipe mounted on a heater block.
3 (A) is a perspective view of a heat resistant rubber nozzle.
3 (B) is a cross-sectional view of a heat resistant rubber nozzle.
3C is a bottom view of the heat resistant rubber nozzle.
3 (D) is a sectional view of the inner nozzle.
FIG. 4 is a yarn outlet view through which a portion of a nozzle tip is injected or cut. FIG.
Fig. 4 (A) is a bottom view of a nozzle tip pierced by a needle.
4 (B) is a cross-sectional view of a needle tip pierced with a needle.
Fig. 4 (C) is a cross-sectional view of the nozzle tip.
FIG. 4 (D) is a nozzle tip lower view cut by a triangle with a knife.
Fig. 4 (E) is a nozzle tip bottom view cut with a knife + (quadrangle).
FIG. 4 (F) is a nozzle tip lower view cut by a 5-angle knife.
Fig. 4 (G) is a view of the tip of the nozzle tip cut by a knife.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a perspective view of the heat resistant rubber nozzle of the present invention.

As shown in the perspective view, the heat resistant rubber nozzle 1 is equipped with the nozzle tip 4 inside the tip of the nozzle so that only the end portion of the nozzle tip 4 is visible, The nozzle tip 4 is inserted into the inner nozzle 2, and the nozzle tip fixing cover 3 is inserted into the center.

The nozzle tip fixing cover 3 is an important part that protects the nozzle tip 4 and receives the heat of the heater block 7 to sustain the temperature in the nozzle tip 4 constantly.

As the material of the nozzle tip fixing cover 3, copper (Cu), silver (Ag) or an alloy having high thermal conductivity is selected,

 The processing of the nozzle tip fixing cover 3 is carried out in such a manner that the inner nozzle 2 is pierced and the end portion thereof is narrowed so that the melted material is pressurized inside the nozzle tip 4 The heat of the heater block 7 is conducted to the nozzle tip 4 as a good conductor so as to prevent the nozzle tip 4 from falling off or stretching, Keep the temperature constant by conserving the heat,

The heat-resistant rubber nozzle 1 can be attached to or detached from the heater block 7 by machining a male thread and a lower portion thereof at a hexagonal angle so that a tool can be used. However,

The end portion is concaved inward and outward to protect the nozzle tip 4 in conformity with the shape of the nozzle tip 4 and to tightly and firmly engage.

The inner nozzle 2 is a component that is installed innermost in the heat resistant rubber nozzle 1 as shown in Figs. 2, 3 (B), and 3 (C)

The internal nozzle 2 is formed by drilling the filament supply port 8 at the center and forming a concave internal nozzle discharge port 9 at the end thereof and having a large diameter. The nozzle tip inserting jaw 6 is machined and the end is recessed to fit the nozzle tip 4 and can be accurately inserted into the nozzle tip fixing cover 3,

As the material of the nozzle tip 4, one of fluorine rubber, silicone rubber, and synthetic resin having high elasticity, high heat resistance and non-tackiness is selected and molded as shown in Fig. 4 (B)

4, the injection port 5 of the nozzle tip 4 is a nozzle which is different from a nozzle made of a metal material in that a hole is not seen and only a needle mark or a cut mark is seen ,

One of the needle outlets (exit 5) or one of the knife outlets 5 (cut out) cut by a knife, triangle, + (quadrangle), 5 angle, , The nozzle tip 4 is machined.

The method for assembling the heat resistant rubber nozzle 1 is such that the nozzle tip 4 is inserted up to the nozzle tip inserting jaw 6 of the inner nozzle 2 and placed on the nozzle tip fixing cover 3 and pressed by a press And the heat-resistant rubber nozzle 1 is assembled and joined to the heater block 7.

The extruding of the material from the heat resistant rubber nozzle 1 is carried out in such a manner that the molten material is extruded from the filament supply port 8 so that the material melted by the heat of the heater block 7 can be easily injected, And the space inside the discharge port 5 is formed to have a conical shape facing outward as shown in Figs. 2 and 3 (B).

While the nozzle tip 4 is pressurized when the needle outlet 5 is extruded,

Injection can be easily injected even if the pressure to be injected is weak, in order of -, triangle, + (quadrangle), pentangle, hexagon, The angled nozzle tip 4 is better open and is also injected at lower pressures.

In particular, in the case of a metal nozzle, it is possible to change the size of the nozzle by replacing it with a nozzle having a different diameter or by mounting a plurality of nozzles. However, since the diameter of the tip is already determined, it is difficult to achieve the desired purpose.

However, the nozzle tip 4 of the flexible rubber nozzle can be expected to have an effect of providing various sizes of nozzles when the pressure is low, when the pressure is low, and when the pressure is high, it is wide.

When the nozzle tip 4 made of a material with high elasticity and non-adhesive property is pressed by a needle or the like and the nozzle hole is not seen, the injection port 5 is extended and the material is injected and the step motor is stopped The injection port 5 is immediately closed, the material is cut off, the filament is not formed, the end of the discharge port 5 is clean, and the subsequent injection operation is also cleaned, It is possible to implement the output exactly as desired, to be clean and to improve the quality, and also to save time for post processing.

1. Heat-resistant rubber nozzle.
2. Inner nozzle.
3. Nozzle tip fixing cover.
4. Nozzle tip.
5. Outlet.
6. Nozzle tip insert jaw.
7. Heater block.
8. Filament supply port.
9. Inner nozzle outlet.
10. Filament supply pipe.

Claims (1)

The heat resistant rubber nozzle 1 is composed of an inner nozzle 2, a nozzle tip 4, and a nozzle tip fixing cover 3,
The nozzle tip fixing cover 3 is formed by machining a male thread at one end with a metal having a good thermal conductivity and machining it at a hexagonal shape in the middle and by machining the end to fix and protect the nozzle tip 4,
The inner nozzle 2 is made of a metal having a good thermal conductivity and is provided with a filament supply port 8 at the center thereof and a nozzle tip inserting jaw 6 at the outer surface thereof and a concave inner nozzle discharge port 9 Processing,
The nozzle tip 4 is formed of a material selected from the group consisting of fluorine rubber, silicone rubber and synthetic resin as a material having high heat resistance and high elasticity and non-tacky property, to form the nozzle tip 4, The nozzle tip 4 having been machined by selecting one of the groups of cut out from the outlet 5 or a group cut by the knife-, triangle-, + (quadrangle), pentagonal or hexagonal- Is inserted up to the nozzle tip inserting jaw (6) of the inner nozzle (2), placed on the nozzle tip fixing cover (3), and pressed tightly to be pressed tightly.
KR1020150076586A 2015-05-29 2015-05-29 3D print thermostable rubber nozzle KR101664695B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107351383A (en) * 2017-08-30 2017-11-17 四川荷斐斯科技发展有限公司 The 3D printer material spray mechanism being conveniently replaceable
KR101867433B1 (en) 2017-04-21 2018-06-15 한국생산기술연구원 Fdm-3d printer nozzle
KR20190115497A (en) * 2018-03-14 2019-10-14 만다린로보틱스 주식회사 3 Dimension constructing apparatus using multiple nozzles

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060062897A (en) * 2004-12-06 2006-06-12 김관표 Nozzle for injection molding apparatus and processing method of the nozzle
JP2009262324A (en) * 2008-04-21 2009-11-12 Marugo Rubber Ind Co Ltd Injection molding nozzle for rubber product
KR101346704B1 (en) 2013-10-18 2013-12-31 이재식 3-dimensional printer being capable of forming muiti-color products
KR20140008800A (en) * 2012-07-12 2014-01-22 이명효 Nozzle head for a forming apparatus
KR101430582B1 (en) 2014-01-17 2014-08-21 비즈텍코리아 주식회사 3D printer with extruder including multi feeder and rotable multi nozzle and thereof operating method
KR101451794B1 (en) 2014-03-24 2014-10-16 주식회사 쓰리디코리아 Complex 3D printer and its control method
KR101502342B1 (en) 2013-09-25 2015-03-13 (주)하이비젼시스템 Apparatus spouting 3d printing material by using screw and 3d printer using the apparatus
KR20150030453A (en) 2013-09-12 2015-03-20 최근식 Nozzle structure of three-dimensional printer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060062897A (en) * 2004-12-06 2006-06-12 김관표 Nozzle for injection molding apparatus and processing method of the nozzle
JP2009262324A (en) * 2008-04-21 2009-11-12 Marugo Rubber Ind Co Ltd Injection molding nozzle for rubber product
KR20140008800A (en) * 2012-07-12 2014-01-22 이명효 Nozzle head for a forming apparatus
KR20150030453A (en) 2013-09-12 2015-03-20 최근식 Nozzle structure of three-dimensional printer
KR101502342B1 (en) 2013-09-25 2015-03-13 (주)하이비젼시스템 Apparatus spouting 3d printing material by using screw and 3d printer using the apparatus
KR101346704B1 (en) 2013-10-18 2013-12-31 이재식 3-dimensional printer being capable of forming muiti-color products
KR101430582B1 (en) 2014-01-17 2014-08-21 비즈텍코리아 주식회사 3D printer with extruder including multi feeder and rotable multi nozzle and thereof operating method
KR101451794B1 (en) 2014-03-24 2014-10-16 주식회사 쓰리디코리아 Complex 3D printer and its control method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
wakalics.blogspot.com 2015.0106
제목: 'FDM(FFF)방식 3D프린터의 종류별 핫앤드(노즐과 히터블록) 구조 분석'을 보면 3D프린터에서 가장 중요한 부품이 노즐과 가열장치라고 지적하고 노즐의 설계가 출력물의 품질을 좌우한다고 했다.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101867433B1 (en) 2017-04-21 2018-06-15 한국생산기술연구원 Fdm-3d printer nozzle
CN107351383A (en) * 2017-08-30 2017-11-17 四川荷斐斯科技发展有限公司 The 3D printer material spray mechanism being conveniently replaceable
KR20190115497A (en) * 2018-03-14 2019-10-14 만다린로보틱스 주식회사 3 Dimension constructing apparatus using multiple nozzles
KR102141454B1 (en) * 2018-03-14 2020-08-05 만다린로보틱스 주식회사 3 Dimension constructing apparatus using multiple nozzles

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