KR101627683B1 - A 3D printing apparatus possible for manufacturing a hollow body and a 3D printing method using the same - Google Patents
A 3D printing apparatus possible for manufacturing a hollow body and a 3D printing method using the same Download PDFInfo
- Publication number
- KR101627683B1 KR101627683B1 KR1020150163851A KR20150163851A KR101627683B1 KR 101627683 B1 KR101627683 B1 KR 101627683B1 KR 1020150163851 A KR1020150163851 A KR 1020150163851A KR 20150163851 A KR20150163851 A KR 20150163851A KR 101627683 B1 KR101627683 B1 KR 101627683B1
- Authority
- KR
- South Korea
- Prior art keywords
- hollow body
- support
- heat source
- metal
- powder
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000010146 3D printing Methods 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title description 2
- 239000000843 powder Substances 0.000 claims abstract description 109
- 229910052751 metal Inorganic materials 0.000 claims abstract description 92
- 239000002184 metal Substances 0.000 claims abstract description 92
- 238000000465 moulding Methods 0.000 claims abstract description 30
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 18
- 238000007493 shaping process Methods 0.000 claims description 18
- 239000011777 magnesium Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 238000010894 electron beam technology Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052763 palladium Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910052790 beryllium Inorganic materials 0.000 claims description 4
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 238000005304 joining Methods 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B29C67/0085—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- B29C67/0088—
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- B22F2003/1056—
-
- B22F2003/1057—
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
One embodiment of the present invention provides a metal 3D printing apparatus for performing molding by stacking a molding layer from an upper end to a lower end of a hollow body while raising a hollow body, and a 3D molding method using the same. A metal 3D printing apparatus capable of forming a hollow body according to an embodiment of the present invention includes a powder bed for storing metal powders, a heat source located at a side of the powder bed and forming heat of the metal powders to form respective molding layers, And a driving unit that is coupled to a support and a support for fixing the hollow body, and moves the support vertically or horizontally.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal 3D printing apparatus capable of forming a hollow body and a 3D molding method using the same, and more particularly to a metal 3D printing apparatus capable of forming a hollow shape by stacking a molding layer from the top to the bottom of a hollow body while raising the hollow body A metal 3D printing device and a 3D forming method using the same.
In recent years, 3D printers that can produce products with only drawings have attracted much interest, which is called a new industrial revolution. 3D printers produce a three-dimensional product by layering the material one after another by continuously reconstructing a two-dimensional cross-section for a digitized three-dimensional product design.
Although the main material for 3D printing is synthetic resin, recently industrial plastics have been expanding into industrial plastics and metal powders.
Metal 3D printers can be classified into two broad categories. The first is Powder Bed Fusion (PBF). This method is a method in which a powder layer is laid on a powder bed having a certain area in a powder feeder, and a laser or an electron beam is selectively irradiated, and then melted and piled up one by one. The second is Directed Energy Deposition (DED). In this method, powders are supplied in a protective gas atmosphere in real time, and a high output laser is used to melt and laminate them immediately upon supply.
Korean Patent Laid-Open No. 10-2012-0128171 entitled "Three-dimensional Printing of Laminated Laser Welding Method of Metal Powder," hereinafter referred to as Prior Art 1), a work table is fixed in a vacuum chamber in a vacuum atmosphere, , The powder material printing tube is transferred to the Y axis and the Z axis and the height control plate of the powder material is moved in the Y axis and Z axis to perform the planarization of the powder material and the powder material printing tube, The control panel is slid to the vertical slide means and the horizontal Y-axis guide and is moved to the upper feed motor and the Y-axis feed motor. The laser output section is fed in the X-axis, Y-axis and Z- A three-dimensional printing method of a laser welding method in which a metal powder which is assembled by a slide and is moved by an upper feed motor and a Y-axis feed motor is laminated is disclosed.
In the prior art 1, the metal powder is scattered on a work table and melted and cured with a laser to form a shaping layer, and the above process is repeated while increasing the height of the metal powder with the powder material height regulating plate, Therefore, in the case of forming a hollow body, the metal powder is pierced into a mold in which the metal powder remains, thereby removing the remaining metal powder, thereby realizing a hollow structure. The first problem is that the shape is limited and the process is complicated .
The above-mentioned prior art 1 has a second problem that since the formed layer already formed is present in the metal powder layer and can not be irradiated with the laser, the positions of melting and curing by the laser are limited.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.
According to an aspect of the present invention, there is provided a powder bed for storing metal powders. A heat source positioned at a side of the powder bed and forming heat of the metal powder to form each of the molding layers; A support for fixing the hollow body with a joint portion joined to an upper end of the hollow body formed by the heat source portion; And a driving unit coupled to the support and moving the support in the up and down or left and right directions, wherein the heat source unit and the support relatively rotate, and a metal 3D printing device Lt; / RTI >
In the embodiment of the present invention, the hollow body may be formed by stacking from the top to the bottom according to the upward movement of the support.
In the embodiment of the present invention, a plurality of joints may be provided in the support.
In an embodiment of the present invention, the support may be prefabricated to fit the shape of the hollow body.
In the embodiment of the present invention, the support may be formed of the metal powder by the heat source unit before the hollow upper body molding.
In the embodiment of the present invention, the driving unit may vibrate to remove the metal powder remaining in the hollow body during the formation of the hollow body.
The metal powder may be at least one selected from the group consisting of Fe, Ni, Cr, Co, Ti, Al, Cu, ), Silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), zinc (Zn), lead (Pb), tin ), And the like.
The metal powder may be at least one selected from the group consisting of Fe, Ni, Cr, Co, Ti, Al, Cu, ), Silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), zinc (Zn), lead (Pb), tin ). ≪ / RTI >
In an embodiment of the present invention, the support may be formed of the same material as the hollow body.
In an embodiment of the present invention, the heat source unit may be formed of one of a ND: YAG laser, a CO 2 laser, or an optical fiber laser.
In an embodiment of the present invention, the heat source unit may be formed of an E-Beam device.
In the embodiment of the present invention, the heat source unit can move vertically or laterally and conically move.
In the embodiment of the present invention, the powder bed may vibrate so that the metal powder has a uniform distribution within the powder bed.
In the embodiment of the present invention, the powder bed may perform a relative rotational motion with the heat source unit or a relative rotational motion with the support.
In the embodiment of the present invention, the powder bed may move up and down to form a focus of the heat source on the surface of the metal powder.
In an embodiment of the present invention, the 3D printing apparatus of the present invention may further include a control unit for controlling the powder bed, the heat source unit, or the driving unit.
According to an aspect of the present invention, there is provided a method of manufacturing a hollow body, comprising the steps of: (i) preparing a support designed to fit the hollow body and combining the support with the driving unit; (Ii) starting molding from a predetermined joint provided in the support; (Iii) as the support moves up to the shaping layer thickness height, the shaping layer formed by the heat source of the heat source portion is stacked from the top to the bottom to form the hollow body; And (iv) separating the support and the hollow body from each other after the hollow body is completed. The present invention also provides a 3D molding method using the metal 3D printing apparatus capable of molding a hollow body.
In the embodiment of the present invention, the step of vibrating the driving unit to remove the metal powder remaining in the hollow body may be performed between the step (iii) and the step (iv) have.
In the embodiment of the present invention, the powder bed may be vibrated between the step (iii) and the step (iv) such that the metal powder has a uniform distribution within the powder bed. have.
Since the hollow body is fabricated by laminating the shaping layers from the upper end to the lower end of the hollow body while raising the support, the hollow body is molded, The first effect that the shape can be molded can be obtained.
The present invention has the second effect that the formed layer is formed from the upper end to the lower end of the hollow body so that the formed layer is not exposed to the outside and the positions of melting and curing by the heat source are not limited.
It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.
1 is a schematic diagram illustrating a process start step of a metal 3D printing apparatus according to an embodiment of the present invention.
2 is a schematic diagram of an initial step of a metal 3D printing apparatus according to an embodiment of the present invention.
3 is a schematic diagram of an intermediate step of a metal 3D printing apparatus according to an embodiment of the present invention.
FIG. 4 is a schematic view of a stage in which a hollow body according to an embodiment of the present invention is completed.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.
Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.
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.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic view showing a process start step of a metal 3D printing apparatus according to an embodiment of the present invention. FIG. 2 is a schematic view of an initial step of a metal 3D printing apparatus according to an embodiment of the present invention. FIG. 4 is a schematic diagram illustrating a step in which a hollow body according to an embodiment of the present invention is completed. FIG. 4 is a schematic view of an intermediate step of a metal 3D printing apparatus according to an embodiment of the present invention.
Hereinafter, a plurality of bonding portions may be provided. In one embodiment, a support (not shown) having a
3, a metal 3D printing apparatus capable of forming a hollow body includes a
Here, the
The relative rotational movement may mean that the movement of the
The
As shown in FIGS. 1 and 2, a plurality of joint portions may be provided in the
At the beginning of molding, melting and curing of the
The
As described above, the length of each of the plurality of joint portions may be different from the position of the
Further, the
The
The driving
In the case where the
The
The
In the description of the present invention, it is explained that the
The
The
The
When one of the ND: YAG laser, the CO 2 laser, or the optical fiber laser is used as the
The
When an electron beam (E-beam) device is used as the
The
For the molding of various types of
The
When the
The
When the
The
When the focal point of the
The metal 3D printing apparatus of the present invention may further include a control unit for controlling the
The relative rotation of the
Hereinafter, a 3D forming method using a metal 3D printing apparatus capable of forming a hollow body will be described.
In the first step, the
In the second stage, molding can be started from a predetermined joint provided in the
At this time, the melting and curing of the
In the third step, as the
In the fourth step, after the completion of the
The step of vibrating the driving
The
Here, the
When the
It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.
The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.
10: Support
11: first joint
12: second joint
13: third joint
14: fourth joint
20:
30: Powder bed
40:
50: metal powder
60: Hollow body
Claims (19)
A powder bed storing a metal powder;
A heat source positioned at a side of the powder bed and forming heat of the metal powder to form each of the molding layers;
A support for fixing the hollow body with a joint portion joined to an upper end of the hollow body formed by the heat source portion; And
A driving unit coupled to the support and moving the support vertically or horizontally;
, ≪ / RTI >
Wherein the heat source unit and the support relatively rotate. ≪ RTI ID = 0.0 > 31. < / RTI >
Wherein the hollow body is formed by stacking from the upper end to the lower end in accordance with the upward movement of the support, thereby forming a hollow body.
Wherein a plurality of the joining portions are provided in the support.
Wherein the support is prefabricated to fit the shape of the hollow body. ≪ RTI ID = 0.0 > 31. < / RTI >
Wherein the support is shaped into the metal powder by the heat source before forming the hollow upper body.
Wherein the driving unit vibrates in order to remove the metal powder remaining in the hollow body during formation of the hollow body.
The metal powder may be at least one selected from the group consisting of Fe, Ni, Cr, Co, Ti, Al, Cu, Au, Ag, (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), zinc (Zn), lead (Pb), tin (Sn), beryllium (Be) and tungsten Wherein the metallic 3D printing device is a powder made of one metal.
The metal powder may be at least one selected from the group consisting of Fe, Ni, Cr, Co, Ti, Al, Cu, Au, Ag, (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), zinc (Zn), lead (Pb), tin (Sn), beryllium (Be) and tungsten Wherein the hollow metal body is a powder of an alloy made of at least one metal.
Wherein the support is formed of the same material as the hollow body.
Wherein the heat source unit is formed of one of ND: YAG laser, CO 2 laser, or optical fiber laser.
Wherein the heat source unit is formed of an electron beam (E-beam) device.
Wherein the heat source unit is vertically or laterally moved and conically moved.
Wherein the powder bed vibrates to uniformly distribute the metal powder inside the powder bed. ≪ RTI ID = 0.0 > 31. < / RTI >
Wherein the powder bed relatively rotates with the heat source or performs relative rotation with the support.
Wherein the powder bed is vertically moved to form a focus of the heat source on the surface of the metal powder.
And a control unit for controlling the powder bed, the heat source unit, or the driving unit.
(I) preparing the support designed to fit the hollow body and engaging with the driving unit;
(Ii) starting molding from a predetermined joint provided in the support;
(Iii) as the support moves up to the shaping layer thickness height, the shaping layer formed by the heat source of the heat source portion is stacked from the top to the bottom to form the hollow body; And
(Iv) separating the support and the hollow body after completion of the hollow body;
The method of claim 3, wherein the metal 3D printing apparatus is capable of forming a hollow body.
Further comprising vibrating the driving unit to remove the metal powder remaining in the hollow body between the step (iii) and the step (iv) 3D molding method using a possible metal 3D printing device.
Further comprising the step of oscillating the powder bed between the step (iii) and the step (iv) so that the metal powder is uniformly distributed in the powder bed. 3D molding method using a possible metal 3D printing device.
Priority Applications (1)
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KR1020150163851A KR101627683B1 (en) | 2015-11-23 | 2015-11-23 | A 3D printing apparatus possible for manufacturing a hollow body and a 3D printing method using the same |
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KR1020150163851A KR101627683B1 (en) | 2015-11-23 | 2015-11-23 | A 3D printing apparatus possible for manufacturing a hollow body and a 3D printing method using the same |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101753207B1 (en) | 2016-06-13 | 2017-07-03 | (주)아이투스 인터내셔날 | Build plate fixing type 3d printer |
WO2018097922A1 (en) * | 2016-11-28 | 2018-05-31 | General Electric Company | Automatic systems and methods for stacking composite plies |
KR101920157B1 (en) * | 2017-06-16 | 2018-11-19 | 박석동 | Injection Mold Apparatus having 3D-type Cooling Core |
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US20060165546A1 (en) * | 2005-01-24 | 2006-07-27 | Aisan Kogyo Kabushiki Kaisha | Method and apparatus for manufacturing three-dimensional objects |
JP2014104467A (en) * | 2012-11-22 | 2014-06-09 | Toyota Motor Corp | Draw-up type continuous casting apparatus, draw-up type continuous casting method and solidification interface detection device |
KR101473165B1 (en) * | 2014-04-18 | 2014-12-16 | 주식회사 스맥 | Apparatus and process for producing three-dimensional object |
-
2015
- 2015-11-23 KR KR1020150163851A patent/KR101627683B1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060165546A1 (en) * | 2005-01-24 | 2006-07-27 | Aisan Kogyo Kabushiki Kaisha | Method and apparatus for manufacturing three-dimensional objects |
JP2014104467A (en) * | 2012-11-22 | 2014-06-09 | Toyota Motor Corp | Draw-up type continuous casting apparatus, draw-up type continuous casting method and solidification interface detection device |
KR101473165B1 (en) * | 2014-04-18 | 2014-12-16 | 주식회사 스맥 | Apparatus and process for producing three-dimensional object |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101753207B1 (en) | 2016-06-13 | 2017-07-03 | (주)아이투스 인터내셔날 | Build plate fixing type 3d printer |
WO2018097922A1 (en) * | 2016-11-28 | 2018-05-31 | General Electric Company | Automatic systems and methods for stacking composite plies |
US10583617B2 (en) | 2016-11-28 | 2020-03-10 | General Electric Company | Automatic systems and methods for stacking composite plies |
KR101920157B1 (en) * | 2017-06-16 | 2018-11-19 | 박석동 | Injection Mold Apparatus having 3D-type Cooling Core |
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