阅读说明：本技术 喷嘴组合件和包括其的3d打印机 (Nozzle assembly and 3D printer including same ) 是由 裴充满 安相范 李振圭 于 2018-04-25 设计创作，主要内容包括：本发明涉及喷嘴组合件和3D打印机,并且根据本发明的一个方面,提供了喷嘴组合件,其包括：壳体；布置在所述壳体中并且连接至墨供应部的喷嘴；布置在所述壳体中的用于在施加电源时产生磁场的第一线圈；布置在所述壳体中的第二线圈,所述第二线圈布置成围绕所述喷嘴和所述第一线圈并且在施加电源时产生磁场,条件是磁场有效区域和磁场强度中的至少一者不同于所述第一线圈；和提起部,所述提起部用于分别提起所述喷嘴以及所述第一线圈和所述第二线圈以定位在所述壳体中或暴露于所述壳体的外部。(The present invention relates to a nozzle assembly and a 3D printer, and according to one aspect of the invention, there is provided a nozzle assembly comprising: a housing; a nozzle disposed in the housing and connected to an ink supply; a first coil disposed in the housing for generating a magnetic field upon application of a power source; a second coil arranged in the housing, the second coil being arranged to surround the nozzle and the first coil and to generate a magnetic field when a power source is applied, provided that at least one of a magnetic field effective area and a magnetic field strength is different from the first coil; and a lifting portion for lifting the nozzle and the first and second coils, respectively, to be positioned in the housing or exposed to the outside of the housing.)

1. A nozzle assembly, comprising:

A housing;

A nozzle disposed in the housing and connected to an ink supply;

A first coil disposed in the housing for generating a magnetic field upon application of a power source;

A second coil arranged in the housing, the second coil being arranged to surround the nozzle and the first coil and to generate a magnetic field when a power source is applied, provided that at least one of a magnetic field effective area and a magnetic field strength is different from the first coil; and

A lifting portion for lifting the nozzle and the first and second coils, respectively, to be positioned in the housing or exposed to the outside of the housing.

2. the nozzle assembly of claim 1,

Wherein the second coil is disposed such that at least one of a magnetic field effective area and a magnetic field strength is greater than at least one of a magnetic field effective area and a magnetic field strength of the first coil.

3. The nozzle assembly of claim 1,

Wherein the length and diameter of the second coil is greater than the length and diameter of the first coil.

4. the nozzle assembly of claim 1,

Further comprising a control portion for controlling the nozzle assembly,

Wherein the control portion controls such that ink is ejected to the outside when the nozzle is exposed to the outside of the housing, and supplies power to the first coil when the first coil is exposed to the outside of the housing.

5. the nozzle assembly of claim 4, wherein the nozzle assembly,

Wherein the control portion is configured to position the nozzle and the second coil in the housing when the first coil is exposed to the outside of the housing.

6. The nozzle assembly of claim 5, wherein the nozzle assembly,

Wherein the control portion is configured to position the nozzle and the first coil in the housing when the second coil is exposed to the outside of the housing.

7. The nozzle assembly of claim 4, wherein the nozzle assembly,

Wherein the control portion is configured to adjust the intensity, supply time, and frequency of the current applied to the first coil and the second coil.

8. The nozzle assembly of claim 1,

A plurality of nozzles are disposed in the housing.

9. a 3D printer, comprising:

a nozzle assembly;

an ink supply arranged to supply ink to the nozzle assembly;

A transfer for moving the nozzle assembly;

a power supply for supplying power to the nozzle assembly; and

A control section for controlling the nozzle assembly, the ink supply flow rate, the power supply section, and the transfer section, respectively,

Wherein the nozzle assembly comprises:

A housing;

a nozzle disposed in the housing and connected to the ink supply;

A first coil disposed in the housing for generating a magnetic field upon application of a power source;

A second coil arranged in the housing, the second coil being arranged to surround the nozzle and the first coil and to generate a magnetic field when a power source is applied, provided that at least one of a magnetic field effective area and a magnetic field strength is different from the first coil; and

A lifting portion for lifting the nozzle and the first and second coils, respectively, to be positioned in the housing or exposed to the outside of the housing.

10. The 3D printer according to claim 9,

Wherein the control portion is configured to cause ink to be ejected to the base side through the nozzle, apply a magnetic field to the ink first through the first coil, and apply a magnetic field to the ink second through the second coil.

11. The 3D printer according to claim 9,

Wherein the second coil is disposed such that at least one of a magnetic field effective area and a magnetic field strength is greater than at least one of a magnetic field effective area and a magnetic field strength of the first coil.

12. the 3D printer according to claim 11,

wherein the length and diameter of the second coil is greater than the length and diameter of the first coil.

13. The 3D printer according to claim 9,

wherein the control portion controls such that ink is ejected to the outside when the nozzle is exposed to the outside of the housing, and supplies power to the first coil when the first coil is exposed to the outside of the housing.

14. The 3D printer according to claim 13,

wherein the control portion is configured to position the nozzle and the second coil in the housing when the first coil is exposed to the outside of the housing.

15. the 3D printer according to claim 13,

Wherein the control portion is configured to position the nozzle and the first coil in the housing when the second coil is exposed to the outside of the housing.

16. the 3D printer of claim 14 or 15,

Wherein the control portion is provided such that, when power is supplied to one of the first coil and the second coil, power is not supplied to the other coil.

Technical Field

The invention relates to a nozzle assembly and a 3D printer comprising the same.

The present application claims priority rights based on korean patent application No. 10-2017-0053505, filed on 26.4.2017, the disclosure of which is incorporated herein by reference in its entirety.

Background

The 3D printer is a printer that outputs an object three-dimensionally and has a plurality of printing methods according to ink materials.

Lamination processing methods typified by 3D printing methods are being performed in FDM, SLA, SLS, and their modified forms.

in the materials of the lamination process, in the case of metals or inks containing metals, it takes a long time and the equipment is heavy and expensive.

Recently, there has been an increasing demand for nozzle assemblies in which printing and curing processes can be efficiently performed.

disclosure of Invention

technical problem

the problem to be solved by the present invention is to provide a nozzle assembly capable of efficiently performing a printing, pre-curing and curing process, and a 3D printer including the same.

Technical scheme

in order to solve the above-mentioned problems, according to an aspect of the present invention, there is provided a nozzle assembly including: a housing; a nozzle disposed in the housing and connected to the ink supply; a first coil disposed in the housing for generating a magnetic field when a power source is applied; a second coil arranged in the housing, the second coil being arranged to surround the nozzle and the first coil and to generate a magnetic field when a power source is applied, provided that at least one of a magnetic field effective area and a magnetic field strength is different from that of the first coil; and a lifting portion for lifting the nozzle and the first and second coils, respectively, to be positioned in the housing or exposed to the outside of the housing.

Further, according to another aspect of the present invention, there is provided a 3D printer including: a nozzle assembly; an ink supply arranged to supply ink to the nozzle assembly; a transfer section for moving the nozzle assembly; a power supply section for supplying power to the nozzle assembly, and a control section for controlling the nozzle assembly, the ink supply flow rate, the power supply section, and the transfer section, respectively.

Here, the nozzle assembly includes: a housing; a nozzle disposed in the housing and connected to the ink supply; a first coil disposed in the housing and configured to generate a magnetic field when a power source is applied; a second coil arranged in the housing, the second coil being arranged to surround the nozzle and the first coil and to generate a magnetic field when a power source is applied, provided that at least one of a magnetic field effective area and a magnetic field strength is different from that of the first coil; and a lifting portion for lifting the nozzle and the first and second coils, respectively, to be positioned in the housing or exposed to the outside of the housing.

advantageous effects

As described above, the nozzle assembly and the 3D printer including the same related to at least one embodiment of the present invention have the following effects.

the nozzles, the small coils and the large coils are accommodated in one housing, so that they have a compact structure and can efficiently perform printing, pre-curing and curing processes.

Drawings

Fig. 1 is a conceptual diagram illustrating a nozzle assembly related to one embodiment of the present invention.

fig. 2 is a configuration diagram showing a 3D printer related to one embodiment of the present invention.

fig. 3 is a diagram schematically illustrating a cross section of a nozzle assembly.

Fig. 4 is a conceptual diagram for explaining a printing process using nozzles.

fig. 5 is a conceptual diagram for explaining a primary curing process using a first coil.

Fig. 6 is a conceptual diagram for explaining a secondary curing process using a second coil.

Detailed Description

hereinafter, a nozzle assembly and a 3D printer including the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

in addition, the same or similar reference numerals are given to the same or corresponding parts regardless of the reference numerals, redundant description thereof will be omitted, and the size and shape of each constituent element shown may be enlarged or reduced for convenience of description.

Fig. 1 is a conceptual diagram showing a nozzle assembly 10 relating to an embodiment of the present invention, fig. 2 is a configuration diagram showing a 3D printer 1 relating to an embodiment of the present invention, and fig. 3 is a diagram schematically showing a section of the nozzle assembly.

Further, fig. 4 is a conceptual diagram for explaining a printing process using the nozzle 11, fig. 5 is a conceptual diagram for explaining a primary curing process using the first coil 12, and fig. 6 is a conceptual diagram for explaining a secondary curing process using the second coil 14.

The 3D printer 1 related to one embodiment of the present invention includes a nozzle assembly 10.

Referring to fig. 1 and 2, a 3D printer 1 related to one embodiment of the present invention includes a nozzle assembly 10, an ink supply 30 arranged to supply ink to the nozzle assembly 10, a transfer 50 for moving the nozzle assembly 10, and a power supply 40 for supplying power to the nozzle assembly 10. In addition, the 3D printer 1 includes a control section 20 for controlling the nozzle assembly 10, the ink supply flow rate, the power supply section 40, and the transfer section 50, respectively. Further, the 3D printer 1 may include a base 2 on which ink ejected from the nozzle assembly 10 is placed.

The nozzle assembly 10 comprises a housing 15, a nozzle 11, a first coil 12, a second coil 14 and a lift 13.

In addition, an ink supply 30 may be connected to the nozzles 11 of the nozzle assembly 10, and ink may be stored in the ink supply 30. Further, the ink may contain a nanomagnetic material, wherein the nanomagnetic material may include metal particles, metal oxide, or alloy particles. For example, the ink may also be a thermosetting resin ink or a thermosetting ceramic ink. Further, the thermosetting resin ink may have a viscosity of 50000cp to 150000cp, and may contain 5 wt% of the nanomagnetic material. Further, the thermosetting ceramic ink may have a viscosity of 5000 to 50000cp, and may include 5 wt% of the nanomagnetic material and 40 to 80 wt% of the alumina particles.

Referring to fig. 1, the nozzle assembly 10 includes a housing 15, a nozzle 11 disposed in the housing 15 and connected to an ink supply 30, and a first coil 12 disposed in the housing 15 for generating a magnetic field when power is applied by a power supply 40. In addition, the nozzle assembly 10 includes a second coil 14 disposed in a housing 15, arranged to surround the nozzle 11 and the first coil 12 and to generate a magnetic field when power is applied, provided that at least one of the magnetic field effective area and the magnetic field strength is different from the first coil 12. Further, the nozzle assembly 10 includes a lifting portion 13 for lifting the nozzle 11, the first coil 12, and the second coil 14, respectively, to be positioned in the housing 15 or exposed to the outside of the housing 15.

The second coil 14 may be arranged such that at least one of the magnetic field effective area and the magnetic field strength is greater than at least one of the magnetic field effective area and the magnetic field strength of the first coil 12. Additionally, the length and diameter of the second coil 14 may be greater than the length and diameter of the first coil 12.

The first coil 12 and the second coil 14 may be arranged to form an alternating electromagnetic field (focused electromagnetic field) on the ink S placed on the base 2. In addition, the first coil 12 and the second coil 14 may each include one or more coil structures. Here, the coil structure may have various structures, such as a circle, a polygon, and a spiral. Further, the shape and number of the coil structures and the arrangement between the coil structures may be determined differently. For example, the coil structure may have a cylindrical or spiral shape. Further, the coil structure may have a circular or rectangular coil shape.

in addition, in the nozzle assembly 10, all of the nozzles 11 and the first and second coils 12 and 14 are in a state of being located inside the housing 15 before operation, and when the nozzles 11 and at least one of the first and second coils 12 and 14 are exposed to the outside of the housing 15 for operation, the rest are located inside the housing 15. That is, the ejection of ink and the curing of ink are performed in a state of being exposed to the outside of the case 15 through the nozzle 11 and the first and second coils 12 and 14, respectively.

Specifically, the control section 20 performs control of the nozzle assembly, wherein the control section 20 can control such that ink is ejected to the outside when the nozzles 11 are exposed to the outside of the casing 15 and power is supplied to the first coil 12 when the first coil 12 is exposed to the outside of the casing 15. In addition, the control portion 20 may be provided to position the nozzle 11 and the second coil 14 in the housing 15 when the first coil 12 is exposed to the outside of the housing 15. Further, the control portion 20 may be provided to position the nozzle 11 and the first coil 12 in the housing when the second coil 14 is exposed to the outside of the housing 15. Further, the control portion 20 is provided such that, when power is supplied to one of the first and second coils 12 and 14, power is not supplied to the other coil.

in addition, the control portion 20 may be configured to adjust the intensity, supply time, and frequency of the current applied to the first and second coils 12 and 14.

Further, the control portion 20 is provided so that the ink S is ejected to the base portion 2 side through the nozzle 11, and a magnetic field is applied to the ink S first by the first coil 12 and second by the second coil 14.

The first coil 12 performs primary curing (precuring) of the ink, and the second coil 14 performs secondary curing of the primarily cured ink.

On the other hand, the second coil 14 is a relatively larger coil than the first coil 12, which starts to operate during formation of a fine pattern (after lamination of the structure to some extent) or after completion of lamination, and performs a function of applying a magnetic field to become a target curing as a whole. In addition, referring to fig. 5, pre-curing means curing to the extent that the components of the ink are not completely cured but the pattern does not collapse and remains constant. In fig. 5, S1 denotes ink that has been pre-cured by the first coil 12, and S2 denotes ink that has not been pre-cured. Further, when the lamination reaches a precured state, activation remains in the lamination interface, so that when secondary curing is performed by the second coil, the strength characteristics at the contact surface are improved compared to full curing of the single coil. On the other hand, in fig. 6, S3 denotes the ink for which the precuring has been completed.

for example, the first coil 12 may be used to solidify a narrow region of the structure, where the strength of the magnetic field may be 1mT to 40mT, and the effective area of the magnetic field may be 10 μm to 500 μm. In addition, the second coil 14 can be used to solidify a large area of the structure, where the strength of the magnetic field can be 30mT to 200mT, and the magnetic field effective area can be 10mm to 1000 mm.

In addition, the transfer part 70 may move the nozzle assembly 10 in various axial directions (x-axis, y-axis, z-axis), and may be provided so as to adjust a gap between the base 10 and the nozzle assembly 10. For example, the nozzle assembly 10 may be provided to be movable up and down relative to the base 2.

Further, the power supply section 60 may supply power having a frequency of 100kHz to 1GHz and a current of 5A to 500A, for example, to the first coil 12 and the second coil 14, respectively. Further, the power supply portion 60 may supply power having different strengths to the first coil 12 and the second coil 22 to generate magnetic fields having different strengths.

Further, fig. 3 shows a sectional shape of a state in which the nozzle assembly 10 shown in fig. 1 is cut in a horizontal direction, wherein the nozzle assembly 10 may also be provided with a single nozzle 11 or a plurality of nozzles 11-1, 11-2.

The preferred embodiments of the present invention as described above are disclosed for illustrative purposes, wherein various modifications, adaptations and additions can be made by those skilled in the art having a general knowledge of the present invention within the spirit and scope of the invention, and such modifications, adaptations and additions are to be construed as falling within the scope of the appended claims.

INDUSTRIAL APPLICABILITY

The nozzle assembly and the 3D printer including the same related to at least one embodiment of the present invention can effectively perform printing, pre-curing, and curing processes.