KR101642856B1 - Powder mixture extrusion device and method for 3D printing - Google Patents
Powder mixture extrusion device and method for 3D printing Download PDFInfo
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- KR101642856B1 KR101642856B1 KR1020140081551A KR20140081551A KR101642856B1 KR 101642856 B1 KR101642856 B1 KR 101642856B1 KR 1020140081551 A KR1020140081551 A KR 1020140081551A KR 20140081551 A KR20140081551 A KR 20140081551A KR 101642856 B1 KR101642856 B1 KR 101642856B1
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Abstract
Disclosed is a powder mixture discharging device for three-dimensional printing and a space forming device capable of controlling a powder mixture content. According to an embodiment of the present invention, there is provided a powder mixture discharging apparatus comprising: a body for containing a powder mixture supplied from a material supplying unit; A nozzle coupled to a lower portion of the body; An extrusion unit accommodated in the body and extruding the powder mixture toward the nozzle; And a heater provided at a discharge-side end of the nozzle.
Description
The present invention relates to a powder mixture dispensing apparatus for three-dimensional printing and a space forming apparatus capable of controlling a powder mixture content.
Product development cycles are becoming shorter as well as the trends of rapidly changing markets. In order to shorten the development time of a specific product, a three-dimensional arbitrary shape production technology is attracting attention.
Unlike 2D printing such as blueprints and drawings, 3D printing technology, which can replicate three-dimensional objects in a short period of time, can be used to produce products in a short period of time. Is expected to bring many changes.
The 3D printing technology improves the existing flat printing method and builds the actual shape by stacking the output step by step. In the medical industry, it is used for tooth model, pre-surgery simulated experimental shape, etc. In the construction industry, And is actually applied to the production of shapes.
3D printing technology can reduce design errors by realizing the shape created by using 3D computer-aided design (CAD) or by reverse engineering (tracking the basic design details by analyzing finished products) To be done.
A three-dimensional printer capable of doing this is a real-life replicator that takes objects, designs objects in 3D, creates CAD files of computer files, and then sprays liquid plastics, metal powder, etc. from the printer nozzles into a design shape.
In addition to the early prototype (Rapid Prototype) technology that shows the designed shape, 3D printing technology can be used to create arbitrary shapes (SFF , Solid Freeform Fabrication) technology.
In the field of tissue engineering, the FDM (Fused Deposition Modeling) method is applied to the arbitrary shape production (SFF) method, and the melt deposition modeling device is also disclosed in Korean Patent No. 10-0893889 (melt flow compensation method in extrusion apparatus) .
FIG. 1 is a view showing a conventional melting deposition modeling apparatus, and FIG. 2 is a diagram showing a bottleneck phenomenon at the time of mixture discharge.
Referring to FIG. 1, a conventional melt
The
Since the conventional melt
In the case of a single material, there is no problem in discharging the material which has been melted at a high temperature by using the
The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.
The present invention provides a powder mixture dispensing apparatus for three-dimensional printing capable of three-dimensional printing using a powder mixture in which a plurality of particles are evenly distributed as a modeling material, and a space shaping apparatus capable of controlling a powder mixture amount.
The present invention relates to a powder mixture dispensing device and a powder mixture dispensing device capable of three-dimensionally stacking in the form of a mixture or a pore to prevent bottleneck at the nozzle inlet by discharging the molten modeling material by applying heat at the nozzle end, And to provide a space-shaping apparatus that can be used.
The present invention relates to a porous three-dimensional structure, a three-dimensional complex having high rigidity or elasticity, a three-dimensional complex having an inclined structure according to the density change of particles, a three-dimensional smart structure having various physical properties The present invention is to provide a powder mixture dispensing apparatus for three-dimensional printing capable of being manufactured and a space shaping apparatus capable of controlling a powder mixture content.
Other objects of the present invention will become readily apparent from the following description.
According to an aspect of the present invention, there is provided a powder mixing apparatus comprising: a body for receiving a powder mixture supplied from a material supply unit; A nozzle coupled to a lower portion of the body; An extrusion unit accommodated in the body and extruding the powder mixture toward the nozzle; And a heater provided at a discharge-side end of the nozzle.
The powder mixture may be a powder state in which a plurality of particles are mixed with a predetermined amount and at least one of the plurality of particles may be in a molten state at a discharge side end of the nozzle by heating the heater.
The extruding portion has a screw shape so that the distribution state of the powder mixture can be maintained.
According to another aspect of the present invention, there is provided a method of manufacturing a three-dimensional modeling material, comprising: a material supply unit that supplies a three-dimensional modeling material in a powder state in which a plurality of particles are mixed; A build platform on which the 3D modeling material is printed to produce a 3D structure; And a powder mixture dispensing device for dispensing the powder mixture supplied from the material supply unit onto the build platform in a molten state by heating at a discharge side end of the nozzle.
The material supply unit includes: a first material supply unit for supplying the first material in a particle state; A second material supply unit for supplying the second material in a particle state; And a content control unit for mixing the first material supplied from the first material supply unit and the second material supplied from the second material supply unit at a predetermined mixing ratio to generate the powder mixture.
A solenoid valve is provided in a first passage between the first material supply unit and the content control unit and a second passage between the second material supply unit and the content control unit so that the operation of the solenoid valve is controlled according to the mixing ratio The degree of opening and closing of the first passage and the second passage can be adjusted.
Alternatively, the material supply unit may include: a first material supply unit for supplying the first material in a particle state through a rotation operation of the first screw installed therein; A second material supply unit for supplying the second material in a particle state through a rotation operation of a second screw provided inside; A first motor for rotating the first screw; A second motor for rotating the second screw; And a motor control unit for controlling operations of the first motor and the second motor in accordance with the mixing ratio of the powder mixture.
The motor control unit may control the first motor and the second motor such that the first screw and the second screw have a rotation speed corresponding to the mixing ratio.
The material supply unit may change at least one of the kind and the content of the particles to be mixed into the powder mixture in real time.
Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.
According to the embodiment of the present invention, it is possible to perform three-dimensional printing using a powder mixture in which a plurality of particles are uniformly distributed as a modeling material.
In addition, heat is applied at the tip of the nozzle to eject the molten modeling material, thereby preventing the bottleneck at the nozzle inlet and effecting the three-dimensional lamination of a form having a mixture form or pores.
In addition, by controlling the material content of the powder mixture, a porous three-dimensional structure, a three-dimensional complex having high rigidity or elasticity, a three-dimensional complex having an inclined structure according to the density change of the particle, a three-dimensional smart structure having various physical properties Can be produced.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram of a conventional melt deposit modeling apparatus,
2 is a view showing a bottleneck phenomenon at the time of mixture discharge,
3 is a three-dimensional perspective view of a powder mixture discharging apparatus according to an embodiment of the present invention,
4 is a cross-sectional view of a space forming apparatus according to an embodiment of the present invention,
5 is a conceptual view of a space forming apparatus including a material supply unit according to an embodiment of the present invention;
6 is a conceptual view of a space forming apparatus including a material supply unit according to another embodiment of the present invention;
7 is a view illustrating a process of fabricating a porous three-dimensional structure using the spatial shaping apparatus according to an embodiment of the present invention,
FIG. 8 is a view showing an internal shape of a three-dimensional structure using the spatial shaping apparatus according to an embodiment of the present invention,
9 is a view showing an inner shape of a three-dimensional structure having a gradient structure according to a change in particle density,
10 is a view showing an internal shape of a three-dimensional structure having various physical properties,
11 is an illustration of an application example of a product having various physical properties.
While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.
The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
Also, the terms " part, "" module," and the like, which are described in the specification, mean a unit for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.
It is to be understood that the components of the embodiments described with reference to the drawings are not limited to the embodiments and may be embodied in other embodiments without departing from the spirit of the invention. It is to be understood that although the description is omitted, multiple embodiments may be implemented again in one integrated embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.
FIG. 3 is a three-dimensional perspective view of a powder mixture dispensing apparatus according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view of a space forming apparatus according to an embodiment of the present invention.
3 and 4 illustrate an embodiment of the
The powder
The
The
The
The
A foam base may be provided on the
The powder
The powder
The
The
The
Such an extrusion method enables a powder mixture having a plurality of particles evenly distributed to maintain a uniform distribution state until reaching the inlet of the
The
At the inlet of the
The
In this embodiment, the
In the present embodiment, the
5 is a conceptual view of a space forming apparatus including a material supply unit according to an embodiment of the present invention.
Referring to FIG. 5, the
The first
The mixing ratio of the first material supplied from the first
A method of controlling the content of the first material and the second material in the
For example, the degree of opening / closing of the first passage connected to the first
6 is a conceptual view of a space forming apparatus including a material supply unit according to another embodiment of the present invention.
6, the
The first
The first
The first
The
For example, when the first
FIG. 7 is a view illustrating a process of fabricating a porous three-dimensional structure using the space forming apparatus according to an embodiment of the present invention.
Referring to FIG. 7, there is shown a three-
The three-
In this case, the water-
In tissue engineering, cell scaffolds that act as cell clusters during cell culture need to be transplanted into the human body and need to be made using biocompatible, biodegradable materials. In addition, the cell scaffold is required to have high porosity for supplying nutrients and waste products, a proper pore size for cell growth, and a high surface area for facilitating cell attachment, and structural strength is also required. And may be produced through a three-dimensional structure manufacturing method.
FIG. 8 is a view showing an inner shape of a three-dimensional structure using a spatial shaping apparatus according to an embodiment of the present invention, FIG. 9 is a view showing an inner shape of a three-dimensional structure having an inclined structure according to a change in particle density, FIG. 10 is a view showing an inner shape of a three-dimensional structure having various physical properties, and FIG. 11 is an illustration showing an application example of a product having various physical properties.
Referring to FIG. 8, there is shown a three-
The three-
The three-
Referring to FIG. 9, it is shown that the density of the particles distributed inside can be changed according to the position, so that the rigidity or elasticity of the three-
As shown in Fig. 9 (a) or 9 (b), the particle density distribution has the inclined body structure, as shown in Fig. 5 or 6, Lt; RTI ID = 0.0 > real-time < / RTI > controlled mixture of powders.
10,
The
That is, by controlling the kind and content of the particles contained in the three-
FIG. 11 shows a sneaker which can be regarded as a three-dimensional product having various physical properties as described above.
Sneakers have outsole, middle, and upper, and each part can have different properties depending on its use and location.
It is possible to manufacture sneakers having various physical properties as shown in FIG. 11 by controlling the content of the powder mixture according to the three-dimensional lamination position using the space shaping apparatus according to the present embodiment and performing three-dimensional printing.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.
100: Spatial molding apparatus 110: Powder mixture dispensing apparatus
111: body 112: extrusion part
113: nozzle 114: heater
120: Material supply unit 130: Build platform
6: Powder mixture
210: first supply part 220: second supply part
230: content control unit 310: first supply unit
320:
315: first motor 325: second motor
330:
Claims (9)
A build platform on which the 3D modeling material is printed to produce a 3D structure; And
Wherein the powder mixture supplied from the material supply unit is introduced into the inlet of the nozzle in an unfused state and then heated at the discharge side end of the nozzle to discharge at least one of the plurality of particles in a molten state onto the build platform And a discharge device,
The material supply unit includes:
A first material supply unit for supplying the first material in a particle state through a rotation operation of the first screw installed inside;
A second material supply unit for supplying the second material in a particle state through a rotation operation of a second screw provided inside;
A first motor for rotating the first screw;
A second motor for rotating the second screw;
And a motor control unit for controlling operations of the first motor and the second motor according to a mixing ratio of the powder mixture,
Wherein the motor control unit controls the first motor and the second motor such that the first screw and the second screw have a rotation speed corresponding to the mixing ratio,
When the first material supply part and the second material supply part have the same size mechanical structure,
Wherein the control unit controls the rotation speed of the first motor and the rotation speed of the second motor to a: b so that the content of the first material and the second material in the powder mixture is adjusted to a: b. Molding device.
Wherein the material supply unit changes at least one of a type and a content of particles mixed in the powder mixture in real time.
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KR20190023179A (en) * | 2017-08-28 | 2019-03-08 | 전자부품연구원 | Powder Feeding Device for 3D Printer |
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KR101635720B1 (en) * | 2016-03-04 | 2016-07-01 | 이수연 | Matal 3d printer having induction coil |
CN110891766A (en) * | 2017-07-28 | 2020-03-17 | 惠普发展公司,有限责任合伙企业 | Three-dimensional printer with feeder |
CN114770944B (en) * | 2022-03-30 | 2023-11-17 | 中航迈特粉冶科技(徐州)有限公司 | Powder mixing equipment for 3D printing |
CN115415553A (en) * | 2022-09-16 | 2022-12-02 | 北京科技大学 | Three-dimensional multi-material gradient powder layer laying device and method |
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US6547995B1 (en) | 2001-09-21 | 2003-04-15 | Stratasys, Inc. | Melt flow compensation in an extrusion apparatus |
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KR20190023179A (en) * | 2017-08-28 | 2019-03-08 | 전자부품연구원 | Powder Feeding Device for 3D Printer |
KR102093689B1 (en) * | 2017-08-28 | 2020-03-26 | 전자부품연구원 | Powder Feeding Device for 3D Printer |
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