WO2018066721A1 - Device for supplying metal powder raw material for three-dimensional printing - Google Patents

Device for supplying metal powder raw material for three-dimensional printing Download PDF

Info

Publication number
WO2018066721A1
WO2018066721A1 PCT/KR2016/011079 KR2016011079W WO2018066721A1 WO 2018066721 A1 WO2018066721 A1 WO 2018066721A1 KR 2016011079 W KR2016011079 W KR 2016011079W WO 2018066721 A1 WO2018066721 A1 WO 2018066721A1
Authority
WO
WIPO (PCT)
Prior art keywords
raw material
dimensional printing
metal powder
rotating
printing metal
Prior art date
Application number
PCT/KR2016/011079
Other languages
French (fr)
Korean (ko)
Inventor
이상규
Original Assignee
주식회사 쓰리디컨트롤즈
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 쓰리디컨트롤즈 filed Critical 주식회사 쓰리디컨트롤즈
Priority to PCT/KR2016/011079 priority Critical patent/WO2018066721A1/en
Publication of WO2018066721A1 publication Critical patent/WO2018066721A1/en

Links

Images

Classifications

    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a powder raw material supply device for three-dimensional printing, and more particularly, three-dimensional printing that enables the production of metal products requiring high precision and high precision using a raw material including metal powder by three-dimensional printing technology. It relates to a powder raw material supply device for.
  • a three-dimensional (3D, 3-Dimension) printer is a device for forming a shape in three dimensions using the three-dimensional data on the object to be printed, to have the same or similar shape as the object.
  • Three-dimensional printing is spreading in various fields.
  • These 3D printers have been used in the past for modeling and sample production before mass production, but recently, as the technological basis can be used to form mass-produced products centered on small-volume products, many parts In addition to the automotive sector, many manufacturers use them to make various models such as medical human models and household products such as toothbrushes and razors.
  • thermopolymer a photocurable polymer material that hardens when light is received. This accounts for 56% of the total market.
  • the next most popular material is a solid thermoplastic that is free to melt and harden, accounting for 40% of the market.
  • Filament form is mainly used as a form of thermoplastic material, and existing filament materials include polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), high density polyethylene (HDPE), and polycarbonate (polycarbonate). , PC) and the like are used.
  • the plastic material as described above has a problem of low hardness, and there is a limit that it is not bonded to form steel products such as metal parts requiring high strength and high precision.
  • raw materials including metal powders In order to manufacture metal products that require high strength and high precision by using raw materials including metal powders, raw materials including metal powders must be smoothly supplied by three-dimensional printing nozzles.
  • a polymer binder in order to use metal powder as a 3D printing raw material, a polymer binder must be mixed, so that it is difficult to uniformly mix the metal powder and the polymer binder and supply it to a 3D printing nozzle, which is a metal product requiring excellent mechanical properties and high precision. It was virtually impossible to manufacture.
  • An object of the present invention is to supply a metal powder raw material for three-dimensional printing to evenly mix the metal powder and polymer binder to smoothly supply to the three-dimensional printing nozzle to form a metal product having excellent mechanical properties and high precision To provide a device.
  • the present invention is a three-dimensional printing metal powder raw material supply device for supplying a three-dimensional printing metal raw material mixed with a metal powder and a polymer binder into the three-dimensional printing nozzle head of the three-dimensional printer.
  • the three-dimensional printing metal raw material is stored therein, the lower portion is provided with a raw material outlet for introducing the three-dimensional printing metal raw material into the interior of the three-dimensional printing nozzle head;
  • a raw material conveying screw member mounted inside the raw material storage hopper member and rotatably installed and provided with a spiral wing on an outer circumferential surface to transfer the three-dimensional printing metal raw material downward to the raw material discharge part;
  • a three-dimensional printing metal powder raw material supply apparatus comprising a screw rotating device for rotating the screw member for transferring the raw material.
  • the three-dimensional printing metal powder raw material supply apparatus is rotatably mounted inside the raw material storage hopper member, and a rotating inner cylinder provided on an inner circumferential surface of an upwardly conveying spiral protrusion for transferring the three-dimensional printing metal raw material upwardly.
  • the member may further include.
  • the screw rotating device is a first rotation motor for generating a rotational force by receiving an electric power, transfer the rotational force of the first rotation motor to the raw material conveying screw member to transmit the first rotational power to rotate the raw material conveying screw member And a second rotational power transmission unit configured to transmit the rotational force of the first rotating motor to the rotating inner cylinder member to rotate the screw member for feeding the raw material.
  • the first rotational power transmission unit is a first belt pulley mounted on the shaft of the first rotary motor, a second belt pulley provided on the outer circumferential surface of the screw member for transferring the raw material, and the first belt pulley and the second belt.
  • a first belt wound at both ends of the pulley, and the second rotational power transmitting unit is mounted on a shaft of the first rotating motor to be spaced apart from the first belt pulley, on an outer circumferential surface of the rotating inner cylinder part.
  • a fourth belt pulley and a second belt pulley and the second belt pulley may include a second belt wound at both ends.
  • the raw material discharge portion protrudes in the form of discharge pipe in the lower portion of the raw material storage hopper member
  • the three-dimensional printing metal powder raw material supply apparatus according to the present invention is arranged in the vertical direction of the raw material discharge portion and the raw material transfer to the outer peripheral surface
  • a rotating support shaft member rotatably mounted and having a axial coupling hole penetrated in a longitudinal direction, a shaft support for fixing the rotating support shaft member at an upper portion of the raw material storage hopper member, and the rotating support shaft member.
  • the discharge screw member may be disposed in the discharge portion is provided with a spiral protrusion.
  • the discharging screw member may be provided to partially protrude into the three-dimensional printing nozzle head through the discharge portion.
  • the three-dimensional printing metal powder raw material supply device may further include a screw lift device mounted on the shaft support and moving the discharge screw member up and down.
  • the present invention evenly mixed with the metal powder for the three-dimensional printing mixed with the metal powder and the polymer binder to smoothly supply to the interior of the three-dimensional printing nozzle head to minimize the defect rate during the three-dimensional printing with the metal raw material containing the metal powder Exert.
  • the present invention is to mix the metal powder and the polymer binder evenly to supply smoothly to the three-dimensional printing nozzle to achieve the effect of forming a metal product having excellent mechanical properties and high precision by three-dimensional printing.
  • Figure 2 is a cross-sectional view showing another embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
  • Figure 3 is a cross-sectional perspective view showing an embodiment of a rotating inner cylinder member 400 in another embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
  • Figure 4 is a view showing an operation example of another embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
  • the three-dimensional printing metal powder raw material supply apparatus includes a raw material storage hopper member 100 mounted on the three-dimensional printing nozzle head (10).
  • the present invention is a three-dimensional printing metal powder raw material supply device for supplying a three-dimensional printing metal raw material mixed with a metal powder and a polymer binder into the three-dimensional printing nozzle head 10 of the three-dimensional printer.
  • Metal raw materials for three-dimensional printing present a composition in which a metal powder is aggregated into a polymer binder.
  • austenitic stainless steel having a steel composition of SUS-304L or SUS-316L is powdered as a metal powder in order to prepare such a composition.
  • Austenitic stainless steels are called Cr-Ni stainless steels, and Cr and Ni are added to Fe.
  • the main component of the austenitic stainless steel consists of Fe, Cr, and Ni, and there are various additives shown in Table 1 below.
  • Table 1 below shows a preferred example of the austenitic stainless steel which is a component of the metal powder used to prepare the metal powder-containing composition for three-dimensional printing in the present invention, the embodiment of the present invention is limited to this example only. It is not.
  • Composition 1 (% by weight) 0.03 or less 1.0 or less 1.0 or less 18-20 10-12 0.2 or less 0.03 or less 0.03 or less Balance Fe and other unavoidable impurities
  • Composition 2 (wt%) 0.03 or less 1.0 or less 1.5 or less 16-18 11-14 2 ⁇ 3 0.03 or less 0.03 or less Balance Fe and other unavoidable impurities
  • Carbon (C) reacts with chromium (Cr), which is added to improve corrosion resistance, and may cause corrosion resistance due to precipitation of chromium carbide in the grain boundary at grain boundaries. Therefore, the smaller the content of carbon (C) is, the better. If the carbon (C) is 0.03% by weight or less, the corrosion resistance is not significantly reduced. Therefore, the content of carbon (C) is preferably 0.03% by weight or less.
  • Silicon (Si) is an effective element for deoxidation and is added in the solvent stage. However, if excessively contained, the steel product extracted after degreasing and sintering may cause hardening of the stainless steel sheet, leading to decrease ductility. 1.0 weight% or less is preferable.
  • Manganese (Mn) combines with sulfur (S) inevitably incorporated, and has the effect of reducing sulfur (S) dissolved in stainless steel and suppressing grain boundary segregation of sulfur (S). of sulfur at the grain boundary, which is an effective element to prevent cracking of steel products extracted after degreasing and sintering (prevents cracking of the steel sheet during hot rolling).
  • S sulfur
  • S grain boundary segregation of sulfur
  • Nickel (Ni) is an element which stabilizes an austenite phase and is added when austenite stainless steels are produced. In that case, when content of nickel (Ni) exceeds 14 weight%, an excessive consumption of nickel (Ni) will raise cost. Therefore, the content of nickel (Ni) is preferably 14% by weight or less.
  • Molybdenum (Mo) is an effective element for suppressing local corrosion such as gap corrosion of stainless steel. Therefore, it is effective to add molybdenum (Mo) when steel products are used in harsh environments. However, when it adds more than 3 weight%, stainless steel may be embrittlement and productivity may fall, and excessive consumption of molybdenum (Mo) may raise the cost. Therefore, the content of molybdenum (Mo) is preferably 3% by weight or less.
  • Phosphorus (P) 0.03 wt% or less
  • the lower one is preferable because phosphorus (P) causes a decrease in ductility.
  • phosphorus (P) is 0.03% by weight or less, the ductility does not significantly decrease. Therefore, the content of phosphorus (P) is preferably 0.03% by weight or less.
  • S Sulfur
  • Mn manganese sulfide
  • S sulfur
  • MnS manganese sulfide
  • the lower one is preferable. If it is 0.03 weight% or less, corrosion resistance will not fall remarkably. Therefore, the content of sulfur (S) is preferably 0.03% by weight or less.
  • the balance is iron (Fe) and unavoidable impurities.
  • the austenitic stainless metal powder having the composition and the content ratio of the composition 1 or the composition 2 of Table 1 uses a metal powder having a particle diameter (D50) of 9.5 to 11 ⁇ m.
  • the surface area of the powder is small, to reduce the content of the polymer binder and to smooth degreasing, to maintain a uniform shrinkage during sintering, austenite
  • the system stainless metal powder it is preferable to use a metal powder powdered into a spherical shape.
  • the austenitic stainless metal powder which is composed of the components 1 or 2 and the content ratio of the composition 1 or 2 and spherically powdered to a particle diameter (D50) of 9.5 to 11 ⁇ m, is kneaded with a polymer binder including a binder, a plasticizer and a lubricant.
  • the total weight of the metal powder-containing composition may include 90.0 to 94.0% by weight of the austenite-based stainless metal powder, and may include 6.0 to 10.0% by weight of the polymer binder.
  • austenite-based stainless metal powder is less than 90.0% by weight based on the total weight of the metal powder-containing composition, a large amount of the polymer binder is removed by a degreasing process described later, so that the shape of the semifinished product 40 is to be printed. If it is not maintained, but exceeds 94.0% by weight, a small amount of the polymer binder is added, it is difficult to secure the cohesive force as a feedstock for the three-dimensional printing.
  • the polyethylene copolymer is removed at a high temperature while the steel product subjected to the hot degreasing process maintains its shape.
  • the polyethylene copolymer is preferably contained 3 to 5% by weight based on the total weight of the metal powder-containing composition.
  • Plasticizer is an organic substance that is added to the agglomerated composition by combining austenitic stainless metal powder and binder to facilitate the molding process during 3D printing.
  • Microcrystalline wax, paraffin wax, montan wax (Montan wax) and the like can be used.
  • the present invention adds a paraffin wax (Paraffin Wax) that can increase the ductility by lowering the bonding strength between the polymer binder at a relatively low temperature as a plasticizer.
  • the paraffin wax is preferably included 2.5 to 3.5% by weight relative to the total weight of the metal powder-containing composition.
  • the lubricant is added so that the metal powder-containing composition is melted in the raw material feeder, so that the surface sliding property is good at the time of press injection, so that the supply to the extrusion head 210 of the three-dimensional printer 200 via the feed guide pipe is made smooth.
  • stearic acid As the component to stearic acid (Stearic acid), oleic acid (Oleic acid), palmitic acid (Palmitic acid), linolenic acid (Linolenic acid) and the like can be used, in the present invention, stearic acid is added.
  • the stearic acid is preferably contained 0.5 to 1.5% by weight based on the total weight of the metal powder-containing composition.
  • the austenitic stainless metal powder having the components and the content ratios of the above-mentioned composition 1 or composition 2 and the polyethylene copolymer, which is a binder included in the polymer binder, are uniformly melted at a high temperature of 170 ° C. for 1 hour. After kneading, it is cooled to room temperature. The cooled mixture after the heat kneading is pulverized in a pulverizer or pelletizer and granulated into pellets having a certain particle size, whereby a metal powder-containing composition can be finally produced.
  • the three-dimensional printing metal raw material mixed with the metal powder and the polymer binder is charged into the raw material storage hopper member 100 and discharged to the raw material discharge part of the raw material storage hopper member 100.
  • the raw material storage hopper member 100 is provided with a raw material discharge portion at the lower portion, the raw material discharge portion protrudes in the form of discharge pipe in the lower part of the main body of the raw material storage hopper member 100 and is connected to the three-dimensional printing nozzle head 10 is a three-dimensional printing nozzle
  • the metal material for three-dimensional printing is supplied to the head 10.
  • the raw material storage hopper member 100 has an austenitic stainless metal powder having a composition and content ratio of composition 1 or 2, and pellets assembled after the polymer binder is kneaded at a temperature of 170 ° C. or higher. May be charged to.
  • a three-dimensional printing metal raw material is extruded, and a two-dimensional planar shape (print layer) is repeatedly laminated on a plate to form a product having a three-dimensional shape of an object to be printed.
  • the nozzle unit is provided.
  • the three-dimensional printing nozzle head 10 is to extrude the three-dimensional printing metal raw material supplied from the raw material storage hopper member 100 to the nozzle unit to repeatedly laminate the two-dimensional planar shape (print layer) on the plate to print A product having a three-dimensional shape of an object is molded.
  • the raw material conveying screw member 200 for transferring the three-dimensional printing metal raw material to the raw material discharge portion 120 is placed upright.
  • the raw material transfer screw member 200 is positioned so that the lower end is spaced apart from the outlet of the raw material storage hopper member 100 and is rotated by the screw rotating device 300 to store the three-dimensional printing metal raw material in the raw material storage hopper member 100. To the outlet.
  • the three-dimensional printing metal raw material is transferred to the outlet side of the raw material storage hopper member 100 by the rotation of the raw material transporting screw member 200 and is supplied into the three-dimensional printing nozzle head 10 through the raw material discharge part.
  • FIG. 2 is a cross-sectional view showing another embodiment of the three-dimensional printing metal powder raw material supply apparatus according to the present invention
  • Figure 3 is a rotating inner cylinder member in another embodiment of the three-dimensional printing metal powder raw material supply apparatus according to the present invention
  • Another embodiment of the three-dimensional printing metal powder raw material supply apparatus according to the present invention is rotatably mounted inside the raw material storage hopper member 100 and the upward transfer spiral projection 410 for conveying the three-dimensional printing metal raw material upward ) May further include a rotating inner cylinder member 400 provided on the inner circumferential surface.
  • the raw material storage hopper member 100 includes a main body portion formed in a cylindrical shape, a cone body portion formed in a cone shape at a lower portion of the main body portion, and a raw material discharge portion 120 communicating with an outlet at the center of the cone body portion.
  • Rotating inner cylinder member 400 is rotatably installed on the inner circumferential surface of the main body portion is rotated by receiving the rotational force of the rotating motor, can be rotated by a separate rotating device, receiving the rotational force from the rotating motor of the screw rotating device 300 For example, it is rotated.
  • the screw rotating device 300 may further include a second rotational power transmission unit 320 for transmitting the rotational force of the first rotating motor to the rotating inner cylinder member 400 to rotate the rotating inner cylinder member 400.
  • the first rotary motor is mounted and fixed on the motor support provided on the outer side of the raw material storage hopper member 100, and each of the screw for raw material transfer through the first power transmission unit 310 and the second power transmission unit 320 The member 200 and the rotating inner cylinder member 400 are rotated.
  • the second rotational power transmission unit 320 is a third belt pulley 321 mounted to the shaft of the first rotating motor to be spaced apart from the first belt pulley 311, the fourth belt pulley provided on the outer circumferential surface of the rotating inner cylinder ( 322, the second belt pulley 321 and the fourth belt pulley 322 includes a second belt 323 wound at both ends, respectively.
  • the first rotational power transmission unit 310 and the second rotational power transmission unit 320 stably transmits the rotational force of the first rotary motor through the first belt 313 and the second belt 323 to feed the screw member ( 200 and the inner cylinder member 400 to be stably rotated.
  • a bearing is disposed between the inner circumferential surface of the raw material storage hopper member 100 and the outer circumferential surface of the rotating inner cylinder member 400 so that the rotating inner cylinder member 400 can be smoothly rotated.
  • the upward transfer spiral projection 410 is a spiral spiral along the inner circumference of the rotating inner cylinder member 400 so that when the rotating inner cylinder member 400 is rotated by a ring-shaped spiral projection to upwardly convey the three-dimensional printing metal raw material. It is provided to protrude into a ring-shaped spiral projection is formed.
  • the raw material conveying screw member 200 is disposed on a vertical upper portion of the raw material discharge part 120 disposed at the center of the raw material storage hopper member 100 and has a rotating shaft having an outer diameter larger than the inner diameter of the raw material discharge part 120.
  • the three-dimensional printing metal raw material in the storage hopper member 100 can be stably transferred to the raw material discharge part 120.
  • Agitating protrusions 411 may protrude from upper and lower surfaces of the upwardly feeding spiral protrusion 410, respectively.
  • stirring projection 411 is provided on the upper surface and the lower surface of the upwardly conveying spiral projection 410, respectively, in a position alternated with each other on the upper surface and the lower surface, that is spaced apart from each other to improve the stirring efficiency To do that.
  • the stirring protrusion 411 allows the metal powder and the polymer binder included in the 3D printing metal raw material to be evenly mixed when the 3D printing metal raw material is transferred to the upper side by the upward transfer spiral protrusion 410. .
  • the three-dimensional printing metal powder raw material supply apparatus is placed in the vertical direction of the raw material discharge portion 120 and the screw member 200 for the raw material transport rotatably mounted on the outer peripheral surface and penetrated in the longitudinal direction
  • Rotation support shaft member 500 and the rotation support shaft member 500 is provided with a shaft coupling hole 510 at the upper portion of the raw material storage hopper member 100, the rotary support shaft member 500 Discharge screw member 600 with a spiral protrusion which is rotatably coupled to pass through and protrudes downward of the raw material transport screw member 200 and has a spiral projection for downwardly transporting the three-dimensional printing metal raw material. It may further include a second rotary motor 700 for rotating the screw member 600.
  • Discharge screw member 600 is a portion having a spiral projection is disposed in the raw material discharge portion 120 to stably feed the three-dimensional printing metal raw material into the three-dimensional printing nozzle head 10 through the raw material discharge portion 120. Supply it.
  • the shaft support 110 is an example of being installed and fixed to the body of the raw material storage hopper member 100.
  • discharging screw member 600 is provided to penetrate through the raw material discharge portion 120 so that the lower end portion partially protrudes into the three-dimensional printing nozzle head 10 to supply the three-dimensional printing metal raw material to the three-dimensional printing nozzle head ( 10) Stable supply into.
  • the three-dimensional printing metal powder raw material supply apparatus may further include a screw lifting device 800 mounted on the shaft support 110 and moving the discharge screw member 600 up and down.
  • the screw lifting device 800 moves the discharge screw member 600 up and down to more stably supply the three-dimensional printing metal raw material into the three-dimensional printing nozzle head 10 through the raw material discharge part 120. .
  • the screw lifting device 800 moves the discharge screw member 600 up and down to prevent the three-dimensional printing metal raw materials from agglomeration around the raw material discharge part 120, and the screw member 600 for discharge.
  • the 3D printing metal raw material can be stably supplied into the 3D printing nozzle head 10 smoothly.
  • the screw lifting device 800 is an example of a hydraulic cylinder for moving the motor support plate 710 on which the second rotary motor 700 is mounted up and down.
  • the screw member 600 for discharging up and down is provided. It turns out that various modifications can be made by using a known lifting structure that can be moved.
  • FIG. 4 is a view showing an operation example of another embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
  • the three-dimensional printing metal powder raw material supply apparatus while rotating the inner cylinder member 400 rotates the three-dimensional printing metal raw material upward, the raw material conveying screw member 200 while rotating Since the three-dimensional printing metal raw material is transported downward and discharged through the raw material discharging unit 120, the three-dimensional printing metal raw material may be discharged after being sufficiently mixed in the raw material storage hopper member 100.
  • the three-dimensional printing metal raw material is upwardly transferred to the upwardly conveying spiral protrusion 410 when the rotating inner cylinder member 400 is rotated, and then to the screw member 200 for raw material conveying at the center of the raw material storage hopper member 100. As it is conveyed downward by the metal powder and the polymer binder is more evenly mixed may be discharged to the raw material outlet 120.
  • the present invention evenly mixed with the metal powder for the three-dimensional printing mixed with the metal powder and the polymer binder is smoothly supplied to the interior of the three-dimensional printing nozzle head 10 to reduce the defect rate during the three-dimensional printing with the metal raw material containing the metal powder Minimize.
  • the present invention by mixing the metal powder and the polymer binder evenly to be smoothly supplied to the three-dimensional printing nozzle to enable the three-dimensional printing to form a metal product having excellent mechanical properties and high precision.

Abstract

The present invention relates to a device for supplying a metal powder raw material for three-dimensional printing such that a metal raw material for three-dimensional printing, which is a mixture of metal powder and a polymer binder, is supplied into a three-dimensional printing nozzle head of a three-dimensional printer, the device comprising: a raw material storing hopper member mounted on the three-dimensional printing nozzle head so as to store a metal raw material for three-dimensional printing therein, a raw material discharge portion being provided on the lower portion of the raw material storing hopper member so as to introduce the metal raw material for three-dimensional printing into the three-dimensional printing nozzle head; a raw material transferring screw member which is installed inside the raw material storing hopper member to be able to rotate in an upright position, and which has a helical blade portion provided on the outer peripheral surface thereof so as to discharge the metal raw material for three-dimensional printing downward to the raw material discharge portion; and a screw rotating machine for rotating the raw material transferring screw member, wherein a metal raw material for three-dimensional printing, which is a mixture of metal powder and a polymer binder, is evenly mixed and efficiently supplied into the three-dimensional printing nozzle head such that, during three-dimensional printing using a metal raw material comprising the metal powder, the defective ratio is minimized, and a metal product required to have excellent mechanical properties and a high degree of precision can be molded through the three-dimensional printing.

Description

3차원 프린트용 금속 분말 원료 공급 장치Metal Powder Raw Material Supply Device for 3D Printing
본 발명은 3차원 프린트용 분말 원료 공급 장치에 관한 것으로 더 상세하게는 금속 분말을 포함한 원료를 이용하여 고강도성과 함께 높은 정밀도를 요구하는 금속 제품을 3차원 프린팅 기술로 제조할 수 있도록 하는 3차원 프린트용 분말 원료 공급 장치에 관한 것이다.The present invention relates to a powder raw material supply device for three-dimensional printing, and more particularly, three-dimensional printing that enables the production of metal products requiring high precision and high precision using a raw material including metal powder by three-dimensional printing technology. It relates to a powder raw material supply device for.
3차원(3D, 3-Dimension) 프린터는 인쇄하고자 하는 대상에 대한 3차원 데이터를 이용하여, 그 대상과 동일 또는 유사한 형태를 갖도록 3차원으로 형상물을 성형하는 장비이다. 3차원 프린팅은 다양한 분야에서 사용이 확산되어 가고 있다. 이러한 3차원 프린터는 과거에는 대량생산 이전의 모델링이나 샘플 제작과 같은 용도로 활용되었으나, 최근에는 다품종 소량생산 제품을 중심으로 양산 가능한 제품의 성형에도 사용될 수 있는 기술적 기반이 조성됨에 따라, 다수의 부품으로 구성된 자동차 분야 외에도 의료용 인체모형이나 칫솔이나 면도기와 같은 가정용 제품 등의 다양한 모형을 만들기 위한 용도로 많은 제조 업체에서 사용하고 있다.A three-dimensional (3D, 3-Dimension) printer is a device for forming a shape in three dimensions using the three-dimensional data on the object to be printed, to have the same or similar shape as the object. Three-dimensional printing is spreading in various fields. These 3D printers have been used in the past for modeling and sample production before mass production, but recently, as the technological basis can be used to form mass-produced products centered on small-volume products, many parts In addition to the automotive sector, many manufacturers use them to make various models such as medical human models and household products such as toothbrushes and razors.
3차원 프린터의 제품성형 방식은 크게 대상 물체를 2차원의 평면형태로 성형한 것을 3차원으로 적층하면서 용융부착하여 형태를 만들어가는 이른바 첨가형과, 재료덩어리를 조각하듯이 절삭해서 형태를 만들어가는 절삭형이 있다. 그리고, 첨가형의 일종으로 열가소성 플라스틱으로 된 와이어 또는 필라멘트를 공급릴과 이송롤을 통해 공급하고, 공급된 필라멘트를 작업대에 대하여 상대적으로 XYZ 세 방향으로 위치가 조절되는 3차원 이송기구에 장착된 압출 헤드의 노즐에서 용융시켜 배출함으로써 2차원 평면형태(프린트 층)를 플레이트 상에 반복적으로 적층하여 인쇄하고자 하는 대상의 3차원 형상을 갖는 제품을 성형하는 필라멘트 용융 적층 성형방법이 있다.The three-dimensional printer's product forming method is the so-called additive type, which is formed by melting and adhering while forming the object object in two-dimensional planar shape in three dimensions, and cutting by cutting like a piece of material. There is a brother. In addition, as an additive type, an extrusion head is mounted on a three-dimensional transfer mechanism in which a wire or filament made of thermoplastic is supplied through a supply reel and a transfer roll, and the supplied filament is adjusted in three XYZ directions relative to a work table. There is a filament melt-lamination molding method for molding a product having a three-dimensional shape of an object to be printed by repeatedly laminating a two-dimensional planar shape (print layer) on a plate by melting and discharging it from a nozzle.
현재 3D 프린팅에 가장 많이 쓰이는 소재는 빛을 받으면 굳는 광경화성 고분자 물질 '포토폴리머(photopolymer)'이다. 이는 전체 시장의 56%를 차지한다. 그 다음으로 인기 있는 소재는 녹고 굳는 것이 자유로운 고체 형태의 열가소성 플라스틱으로 시장의 40%를 점유하고 있다. 열가소성 플라스틱 소재의 형태로서 필라멘트(filament) 형태가 주로 이용되고 있는데, 현존하는 필라멘트 소재로는 폴리락트산(polylactic acid, PLA), ABS(acrylonitrile butadiene styrene), HDPE(high density polyethylene), 폴리카보네이트(polycarbonate, PC) 등이 사용되고 있다. Currently, the most widely used material for 3D printing is photopolymer, a photocurable polymer material that hardens when light is received. This accounts for 56% of the total market. The next most popular material is a solid thermoplastic that is free to melt and harden, accounting for 40% of the market. Filament form is mainly used as a form of thermoplastic material, and existing filament materials include polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), high density polyethylene (HDPE), and polycarbonate (polycarbonate). , PC) and the like are used.
그러나, 상술한 바와 같은 플라스틱 소재는 경도가 낮은 문제로, 고강도성과 높은 정밀도를 요하는 금속 부품과 같은 강(鋼)제품을 성형하기에는 접합하지 아니하다는 한계가 존재한다.However, the plastic material as described above has a problem of low hardness, and there is a limit that it is not bonded to form steel products such as metal parts requiring high strength and high precision.
금속 분말을 포함한 원료를 이용하여 고강도성과 함께 높은 정밀도를 요구하는 금속 제품을 3차원 프린팅 기술로 제조하기 위해서는 3차원 프린팅 노즐로 금속 분말을 포함한 원료를 원활하게 공급해야 한다.In order to manufacture metal products that require high strength and high precision by using raw materials including metal powders, raw materials including metal powders must be smoothly supplied by three-dimensional printing nozzles.
그러나, 금속 분말을 3차원 프린팅 원료로 사용하기 위해서는 고분자 바인더를 혼합해야 하므로 금속 분말과 고분자 바인더를 전체적으로 고르게 혼합하고 3차원 프린팅 노즐로 공급하기가 어려워 기계적 물성이 우수하고 높은 정밀도를 요구하는 금속 제품을 제조하기가 사실상 불가능했던 것이다.However, in order to use metal powder as a 3D printing raw material, a polymer binder must be mixed, so that it is difficult to uniformly mix the metal powder and the polymer binder and supply it to a 3D printing nozzle, which is a metal product requiring excellent mechanical properties and high precision. It was virtually impossible to manufacture.
본 발명의 목적은 금속 분말과 고분자 바인더를 고르게 혼합하여 3차원 프린팅 노즐로 원활하게 공급하도록 하여 기계적 물성이 우수하고 높은 정밀도를 요구하는 금속 제품을 성형할 수 있도록 하는 3차원 프린트용 금속 분말 원료 공급 장치를 제공하는 데 있다.An object of the present invention is to supply a metal powder raw material for three-dimensional printing to evenly mix the metal powder and polymer binder to smoothly supply to the three-dimensional printing nozzle to form a metal product having excellent mechanical properties and high precision To provide a device.
상기와 같은 목적을 달성하기 위하여 본 발명은 3차원 프린터의 3차원 프린팅 노즐 헤드의 내부로 금속 분말과 고분자 바인더가 혼합된 3차원 프린팅용 금속원료를 공급하는 3차원 프린트용 금속 분말 원료 공급 장치이며, 상기 3차원 프린팅 노즐 헤드 상에 장착되며 내부에 상기 3차원 프린팅용 금속원료가 저장되고, 하부에 상기 3차원 프린팅용 금속원료를 상기 3차원 프린팅 노즐 헤드의 내부로 유입시키는 원료 배출부가 구비된 원료 저장호퍼부재; 상기 원료 저장호퍼부재의 내부에 세워져 회전 가능하게 설치되며 외주면에 나선형 날개부가 구비되어 상기 3차원 프린팅용 금속원료를 상기 원료 배출부로 하향 이송시키는 원료 이송용 스크류부재; 및 상기 원료 이송용 스크류부재를 회전시키는 스크류 회전기기를 포함하는 것을 특징으로 한 3차원 프린트용 금속 분말 원료 공급 장치를 제공한다.In order to achieve the above object, the present invention is a three-dimensional printing metal powder raw material supply device for supplying a three-dimensional printing metal raw material mixed with a metal powder and a polymer binder into the three-dimensional printing nozzle head of the three-dimensional printer. Is mounted on the three-dimensional printing nozzle head, the three-dimensional printing metal raw material is stored therein, the lower portion is provided with a raw material outlet for introducing the three-dimensional printing metal raw material into the interior of the three-dimensional printing nozzle head; Raw material storage hopper member; A raw material conveying screw member mounted inside the raw material storage hopper member and rotatably installed and provided with a spiral wing on an outer circumferential surface to transfer the three-dimensional printing metal raw material downward to the raw material discharge part; And it provides a three-dimensional printing metal powder raw material supply apparatus comprising a screw rotating device for rotating the screw member for transferring the raw material.
본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치는 상기 원료 저장호퍼부재의 내측에 회전 가능하게 장착되며 상기 3차원 프린팅용 금속원료를 상향 이송시키는 상향 이송용 나선형돌기부가 내주면에 구비된 회전 내통부재를 더 포함할 수 있다. The three-dimensional printing metal powder raw material supply apparatus according to the present invention is rotatably mounted inside the raw material storage hopper member, and a rotating inner cylinder provided on an inner circumferential surface of an upwardly conveying spiral protrusion for transferring the three-dimensional printing metal raw material upwardly. The member may further include.
본 발명에서 상기 회전 내통부재는 상기 스크류 회전기기의 회전모터로부터 회전력을 전달받아 회전될 수 있다.In the present invention, the rotary inner cylinder member may be rotated by receiving a rotational force from the rotary motor of the screw rotary machine.
본 발명에서 상기 스크류 회전기기는 전기전원을 공급받아 회전력을 발생시키는 제1회전모터, 상기 제1회전모터의 회전력을 원료 이송용 스크류부재로 전달하여 원료 이송용 스크류부재를 회전시키는 제1회전력 전달부 및 상기 제1회전모터의 회전력을 회전 내통부재로 전달하여 원료 이송용 스크류부재를 회전시키는 제2회전력 전달부를 포함할 수 있다.In the present invention, the screw rotating device is a first rotation motor for generating a rotational force by receiving an electric power, transfer the rotational force of the first rotation motor to the raw material conveying screw member to transmit the first rotational power to rotate the raw material conveying screw member And a second rotational power transmission unit configured to transmit the rotational force of the first rotating motor to the rotating inner cylinder member to rotate the screw member for feeding the raw material.
본 발명에서 상기 제1회전력 전달부는 상기 제1회전모터의 샤프트에 장착되는 제1벨트풀리, 상기 원료 이송용 스크류부재의 외주면에 구비되는 제2벨트풀리 및 상기 제1벨트풀리와 상기 제2벨트풀리에 양단부가 각각 감기는 제1벨트를 포함하며, 상기 제2회전력 전달부는, 상기 제1회전모터의 샤프트에 상기 제1벨트풀리와 이격되게 장착되는 제3벨트풀리, 상기 회전 내통부의 외주면에 구비되는 제4벨트풀리 및 상기 제3벨트풀리와 상기 제4벨트풀리에 양단부가 각각 감기는 제2벨트를 포함할 수 있다.In the present invention, the first rotational power transmission unit is a first belt pulley mounted on the shaft of the first rotary motor, a second belt pulley provided on the outer circumferential surface of the screw member for transferring the raw material, and the first belt pulley and the second belt. A first belt wound at both ends of the pulley, and the second rotational power transmitting unit is mounted on a shaft of the first rotating motor to be spaced apart from the first belt pulley, on an outer circumferential surface of the rotating inner cylinder part. A fourth belt pulley and a second belt pulley and the second belt pulley may include a second belt wound at both ends.
본 발명에서 상기 상향 이송용 나선형 돌기부의 상부면과 하부면에는 각각 교반용 돌기가 돌출될 수 있다. In the present invention, the stirring projections may protrude from the upper surface and the lower surface of the upwardly feeding spiral projection, respectively.
본 발명에서 상기 교반용 돌기는 상기 상향 이송용 나선형 돌기부의 상부면과 하부면에 각각 구비되되, 상부면과 하부면에서 서로 엇갈리게 위치될 수 있다.In the present invention, the stirring projections are provided on the upper and lower surfaces of the upwardly projecting spiral projection, respectively, and may be alternately positioned at the upper and lower surfaces.
본 발명에서 상기 원료 배출부는 상기 원료 저장호퍼부재의 하부에 배출관 형태로 돌출되며, 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치는 상기 원료 배출부의 수직방향으로 세워져 배치되며 외주면에 상기 원료 이송용 스크류부재가 회전 가능하게 장착되며 길이방향으로 관통된 축결합구멍이 구비된 회전 지지축부재, 상기 회전 지지축부재를 상기 원료 저장호퍼부재의 상부에서 고정하는 축지지대, 상기 회전 지지축부재를 관통하여 회전 가능하게 결합되고 상기 원료 이송용 스크류부재의 하부로 돌출되고 돌출된 부분에 3차원 프린팅용 금속원료를 하향 이송시키는 나선형 돌기부가 구비된 배출용 스크류부재 및 상기 배출용 스크류부재를 회전시키는 제2회전모터를 더 포함할 수 있다.In the present invention, the raw material discharge portion protrudes in the form of discharge pipe in the lower portion of the raw material storage hopper member, the three-dimensional printing metal powder raw material supply apparatus according to the present invention is arranged in the vertical direction of the raw material discharge portion and the raw material transfer to the outer peripheral surface A rotating support shaft member rotatably mounted and having a axial coupling hole penetrated in a longitudinal direction, a shaft support for fixing the rotating support shaft member at an upper portion of the raw material storage hopper member, and the rotating support shaft member. Rotating through and coupled to the discharge screw member and the discharge screw member having a spiral projection for conveying the three-dimensional printing metal raw material downward in the protruding portion and protruding to the lower portion of the raw material conveying screw member It may further include a second rotary motor.
본 발명에서 상기 배출용 스크류부재는 나선형 돌기부가 구비된 부분이 배출부 내로 배치될 수 있다. In the present invention, the discharge screw member may be disposed in the discharge portion is provided with a spiral protrusion.
본 발명에서 상기 배출용 스크류부재는 배출부를 관통하여 하단부가 3차원 프린팅 노즐 헤드의 내부로 일부 돌출되게 구비될 수 있다. In the present invention, the discharging screw member may be provided to partially protrude into the three-dimensional printing nozzle head through the discharge portion.
본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치는 상기 축지지대 상에 장착되며 배출용 스크류부재를 상, 하 이동시키는 스크류 승하강기기를 더 포함할 수 있다.The three-dimensional printing metal powder raw material supply device according to the present invention may further include a screw lift device mounted on the shaft support and moving the discharge screw member up and down.
본 발명은 금속 분말과 고분자 바인더가 혼합된 3차원 프린팅용 금속원료를 고르게 혼합하여 3차원 프린팅 노즐 헤드의 내부로 원활하게 공급하여 금속 분말이 포함된 금속원료로 3차원 프린팅 시 불량률을 최소화하는 효과를 발휘한다.The present invention evenly mixed with the metal powder for the three-dimensional printing mixed with the metal powder and the polymer binder to smoothly supply to the interior of the three-dimensional printing nozzle head to minimize the defect rate during the three-dimensional printing with the metal raw material containing the metal powder Exert.
또한 본 발명은 금속 분말과 고분자 바인더를 고르게 혼합하여 3차원 프린팅 노즐로 원활하게 공급하도록 하여 3차원 프린팅으로 기계적 물성이 우수하고 높은 정밀도를 요구하는 금속 제품을 성형할 수 있도록 하는 효과를 발휘한다.In addition, the present invention is to mix the metal powder and the polymer binder evenly to supply smoothly to the three-dimensional printing nozzle to achieve the effect of forming a metal product having excellent mechanical properties and high precision by three-dimensional printing.
도 1은 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 일 실시 예를 도시한 개략도. 1 is a schematic view showing an embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
도 2는 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 다른 실시 예를 도시한 단면도. Figure 2 is a cross-sectional view showing another embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
도 3은 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 다른 실시 예에서 회전 내통부재(400)의 일 실시 예를 도시한 단면 사시도. Figure 3 is a cross-sectional perspective view showing an embodiment of a rotating inner cylinder member 400 in another embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
도 4는 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 다른 실시 예의 작동 예를 도시한 도면.Figure 4 is a view showing an operation example of another embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
이하, 본 발명을 더욱 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명의 바람직한 실시 예를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다. 본 발명의 상세한 설명에 앞서, 이하에서 설명되는 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니된다. 따라서, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들을 대체할 수 있는 다양한 균등물과 변형예들이 있을 수 있음을 이해하여야 한다.When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention. Prior to the detailed description of the invention, the terms or words used in the specification and claims described below should not be construed as limiting in their usual or dictionary meanings. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.
도 1은 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 일 실시 예를 도시한 개략도이다. 도 1을 참고하면 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치는 3차원 프린팅 노즐 헤드(10) 상에 장착되는 원료 저장호퍼부재(100)를 포함한다. 1 is a schematic diagram showing an embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention. Referring to Figure 1, the three-dimensional printing metal powder raw material supply apparatus according to the present invention includes a raw material storage hopper member 100 mounted on the three-dimensional printing nozzle head (10).
본 발명은 3차원 프린터의 3차원 프린팅 노즐 헤드(10)의 내부로 금속 분말과 고분자 바인더가 혼합된 3차원 프린팅용 금속원료를 공급하는 3차원 프린트용 금속 분말 원료 공급 장치이다.The present invention is a three-dimensional printing metal powder raw material supply device for supplying a three-dimensional printing metal raw material mixed with a metal powder and a polymer binder into the three-dimensional printing nozzle head 10 of the three-dimensional printer.
3차원 프린팅용 금속원료는 금속 분말을 고분자 바인더로 응집시킨 조성물을 제시한다. 특히, 이러한 조성물을 제조하기 위해 본 발명에서는 금속 분말로서 SUS-304L 또는 SUS-316L의 강(鋼) 조성을 갖는 오스테나이트계 스테인레스강이 분체화(粉體化)된 금속 분말을 이용한다.Metal raw materials for three-dimensional printing present a composition in which a metal powder is aggregated into a polymer binder. In particular, in the present invention, austenitic stainless steel having a steel composition of SUS-304L or SUS-316L is powdered as a metal powder in order to prepare such a composition.
오스테나이트계 스테인레스강은 별명 Cr-Ni계 스테인레스강으로 불리고, Fe에 Cr과 Ni을 첨가한 것이다. 오스테나이트계 스테인레스강의 주성분은 Fe, Cr, Ni로 이루어지고, 그 외에는 다음의 표 1에 나타내는 각종의 첨가물이 있다.Austenitic stainless steels are called Cr-Ni stainless steels, and Cr and Ni are added to Fe. The main component of the austenitic stainless steel consists of Fe, Cr, and Ni, and there are various additives shown in Table 1 below.
다음의 표 1은 본 발명에서 3차원 프린팅용 금속 분말 함유 조성물을 제조하기 위해 사용되는 금속 분말의 성분인 오스테나이트계 스테인레스강의 바람직한 예를 나타낸 것이고, 본 발명의 실시의 형태는 이 예만으로 한정하는 것은 아니다.Table 1 below shows a preferred example of the austenitic stainless steel which is a component of the metal powder used to prepare the metal powder-containing composition for three-dimensional printing in the present invention, the embodiment of the present invention is limited to this example only. It is not.
성분ingredient CC SiSi MnMn CrCr NiNi MoMo PP SS 기타Other
조성1(중량%)Composition 1 (% by weight) 0.03이하0.03 or less 1.0이하1.0 or less 1.0이하1.0 or less 18~2018-20 10~1210-12 0.2이하0.2 or less 0.03이하0.03 or less 0.03이하0.03 or less 잔부 Fe 및 기타 불가피한 불순물Balance Fe and other unavoidable impurities
조성2(중량%)Composition 2 (wt%) 0.03이하0.03 or less 1.0이하1.0 or less 1.5이하1.5 or less 16~1816-18 11~1411-14 2~32 ~ 3 0.03이하0.03 or less 0.03이하0.03 or less 잔부 Fe 및 기타 불가피한 불순물Balance Fe and other unavoidable impurities
탄소(C) : 0.03중량％ 이하Carbon (C): 0.03 weight% or less
탄소(C)는 내식성을 개선하기 위해 첨가되는 크롬(Cr)과 반응하여, 입계에 크롬(Cr) 탄화물로서 석출하기(precipitate chromium carbide in the grain boundary) 때문에 내식성의 저하를 초래하는 경우가 있다. 따라서, 탄소(C)의 함유량은 적을수록 바람직하고, 탄소(C)가 0.03중량％ 이하이면, 내식성을 현저하게 저하시키는 일은 없다. 따라서, 탄소(C)의 함유량은0.03중량％ 이하가 바람직하다.Carbon (C) reacts with chromium (Cr), which is added to improve corrosion resistance, and may cause corrosion resistance due to precipitation of chromium carbide in the grain boundary at grain boundaries. Therefore, the smaller the content of carbon (C) is, the better. If the carbon (C) is 0.03% by weight or less, the corrosion resistance is not significantly reduced. Therefore, the content of carbon (C) is preferably 0.03% by weight or less.
규소(Si) : 1.0중량％ 이하Silicon (Si): 1.0 wt% or less
규소(Si)는 탈산을 위해 유효한 원소이며, 용제(溶製) 단계에서 첨가된다. 그러나 과잉하게 함유시키면 탈지 및 소결 후 추출된 강(鋼)제품이 경질화(causes hardening of the stainless steel sheet)하여, 연성이 저하되는(decrease ductility) 경우가 있기 때문에, 규소(Si)의 함유량은 1.0중량％ 이하가 바람직하다.Silicon (Si) is an effective element for deoxidation and is added in the solvent stage. However, if excessively contained, the steel product extracted after degreasing and sintering may cause hardening of the stainless steel sheet, leading to decrease ductility. 1.0 weight% or less is preferable.
망간(Mn) : 1.5중량％ 이하Manganese (Mn): 1.5 wt% or less
망간(Mn)은 불가피적으로 혼입된 황(S)과 결합하여, 스테인리스강에 고용(固溶)한 황(S)을 저감하는 효과를 갖고, 황(S)의 입계편석을 억제(suppresses segregation of sulfur at the grain boundary)하여, 탈지 및 소결 후 추출된 강(鋼)제품의 균열을 방지하는 데에(prevents cracking of the steel sheet during hot rolling) 유효한 원소이다. 그러나, 1.5중량％를 초과하여 첨가해도 첨가하는 효과의 증가는 거의 없다. 오히려, 과잉하게 첨가함으로써 비용의 상승을 초래한다. 따라서, 망간(Mn)의 함유량은 1.5중량％ 이하가 바람직하다.Manganese (Mn) combines with sulfur (S) inevitably incorporated, and has the effect of reducing sulfur (S) dissolved in stainless steel and suppressing grain boundary segregation of sulfur (S). of sulfur at the grain boundary, which is an effective element to prevent cracking of steel products extracted after degreasing and sintering (prevents cracking of the steel sheet during hot rolling). However, even if it adds more than 1.5 weight%, there is little increase in the effect of adding. Rather, excessive addition results in an increase in cost. Therefore, as for content of manganese (Mn), 1.5 weight% or less is preferable.
니켈(Ni) : 10 ~ 14중량％Nickel (Ni): 10 to 14 wt%
니켈(Ni)은 오스테나이트상을 안정화시키는 원소이며, 오스테나이트계 스테인리스를 제조하는 경우에 첨가한다. 그 때, 니켈(Ni)의 함유량이 14중량％를 초과하면, 니켈(Ni)을 과잉하게 소비함으로써 비용의 상승을 초래한다. 따라서, 니켈(Ni)의 함유량은 14중량％ 이하가 바람직하다.Nickel (Ni) is an element which stabilizes an austenite phase and is added when austenite stainless steels are produced. In that case, when content of nickel (Ni) exceeds 14 weight%, an excessive consumption of nickel (Ni) will raise cost. Therefore, the content of nickel (Ni) is preferably 14% by weight or less.
몰리브덴(Mo) : 3중량％ 이하Molybdenum (Mo): 3 wt% or less
몰리브덴(Mo)은 스테인리스강의 틈 부식 등의 국부 부식을 억제하는 데에 유효한 원소이다. 따라서, 강(鋼)제품이 가혹한 환경에서 사용되는 경우에는 몰리브덴(Mo)을 첨가하는 것이 유효하다. 그러나, 3중량％를 초과하여 첨가하면, 스테인리스강이 취화(embrittlement)되어 생산성이 저하되는 경우가 있고, 몰리브덴(Mo)을 과잉하게 소비함으로써 비용의 상승을 초래한다. 따라서, 몰리브덴(Mo)의 함유량은 3중량％ 이하가 바람직하다.Molybdenum (Mo) is an effective element for suppressing local corrosion such as gap corrosion of stainless steel. Therefore, it is effective to add molybdenum (Mo) when steel products are used in harsh environments. However, when it adds more than 3 weight%, stainless steel may be embrittlement and productivity may fall, and excessive consumption of molybdenum (Mo) may raise the cost. Therefore, the content of molybdenum (Mo) is preferably 3% by weight or less.
인(P) : 0.03중량％ 이하Phosphorus (P): 0.03 wt% or less
인(P)은 연성의 저하를 초래하기 때문에 낮은 쪽이 바람직하지만, 0.03중량％ 이하이면 연성을 현저하게 저하시키는 일은 없다. 따라서, 인(P)의 함유량은 0.03중량% 이하가 바람직하다.The lower one is preferable because phosphorus (P) causes a decrease in ductility. However, if phosphorus (P) is 0.03% by weight or less, the ductility does not significantly decrease. Therefore, the content of phosphorus (P) is preferably 0.03% by weight or less.
황(S) : 0.03중량％ 이하Sulfur (S): 0.03% by weight or less
황(S)은 망간(Mn)과 결합하여 황화망간(MnS)을 형성함으로써 내식성을 저하시키는 원소이며 낮은 쪽이 바람직하다. 0.03중량％ 이하이면 내식성을 현저하게 저하시키는 일은 없다. 따라서, 황(S)의 함유량은 0.03중량％ 이하가 바람직하다.Sulfur (S) combines with manganese (Mn) to form manganese sulfide (MnS), which lowers the corrosion resistance. The lower one is preferable. If it is 0.03 weight% or less, corrosion resistance will not fall remarkably. Therefore, the content of sulfur (S) is preferably 0.03% by weight or less.
잔부는 철(Fe) 및 불가피적 불순물이다.The balance is iron (Fe) and unavoidable impurities.
본 발명에서, 표 1의 조성 1 또는 조성 2의 성분 및 함량비를 갖는 오스테나이트계 스테인레스 금속 분말은 입자직경(D50) 9.5 ~ 11㎛의 크기를 갖는 금속 분말을 이용하는 것이 바람직하다. 또한, 최종 완성품인 강(製)제품의 밀도를 높이고, 분말의 표면적이 작아 고분자 바인더 함량을 줄일 수 있으며 탈지가 원할하게 이루어질 수 있을 뿐만 아니라, 소결 시 균일한 수축을 유지하도록 하기 위해서, 오스테나이트계 스테인레스 금속 분말은 구(球)형으로 분체화(粉體化)된 금속 분말을 이용하는 것이 바람직하다. 오스테나이트계 스테인레스 금속 분말을 제조하는 방식은 액체화된(과열된) 오스테나이트계 스테인레스 금속 스트림을 미세한 액적(droplet)으로 비산(飛散)시키고 그 다음 입자직경(D50) 9.5 ~ 11㎛의 구형 고체입자로 냉각하는 분무 공정에 의해 제조될 수 있다.In the present invention, it is preferable that the austenitic stainless metal powder having the composition and the content ratio of the composition 1 or the composition 2 of Table 1 uses a metal powder having a particle diameter (D50) of 9.5 to 11 μm. In addition, in order to increase the density of the finished steel products, the surface area of the powder is small, to reduce the content of the polymer binder and to smooth degreasing, to maintain a uniform shrinkage during sintering, austenite As the system stainless metal powder, it is preferable to use a metal powder powdered into a spherical shape. The process for producing austenitic stainless metal powders involves scattering a liquidized (superheated) austenitic stainless metal stream into fine droplets and then spherical solid particles having a particle diameter (D50) of 9.5-11 μm. It can be produced by a spray process to cool with.
조성 1 또는 조성 2의 성분 및 함량비로 조성되고 9.5 ~ 11㎛의 입자직경(D50)으로 구형 분체화된 오스테나이트계 스테인레스 금속 분말은 결합제, 가소제 및 윤활제를 포함하는 고분자 바인더와 혼련된다. 이때, 금속 분말 함유 조성물의 전체 중량에 대해 오스나이트계 스테인레스 금속 분말이 90.0 ~ 94.0중량%로 포함되고, 고분자 바인더가 6.0 ~ 10.0중량%로 포함될 수 있다. 오스나이트계 스테인레스 금속 분말이 금속 분말 함유 조성물의 전체 중량에 대해 90.0 중량% 미만이면, 후술하는 탈지 공정에 의해 다량의 고분자 바인더가 제거되어 반제품(40)의 형상이 인쇄하고자 하는 대상의 3차원 형상으로 유지되지 아니하고, 94.0 중량%를 초과하게 되면, 고분자 바인더가 소량으로 첨가되어 3차원 프린팅을 진행하기 위한 공급 원료로서의 응집력을 확보하기 어렵다.The austenitic stainless metal powder, which is composed of the components 1 or 2 and the content ratio of the composition 1 or 2 and spherically powdered to a particle diameter (D50) of 9.5 to 11 μm, is kneaded with a polymer binder including a binder, a plasticizer and a lubricant. At this time, the total weight of the metal powder-containing composition may include 90.0 to 94.0% by weight of the austenite-based stainless metal powder, and may include 6.0 to 10.0% by weight of the polymer binder. If the austenite-based stainless metal powder is less than 90.0% by weight based on the total weight of the metal powder-containing composition, a large amount of the polymer binder is removed by a degreasing process described later, so that the shape of the semifinished product 40 is to be printed. If it is not maintained, but exceeds 94.0% by weight, a small amount of the polymer binder is added, it is difficult to secure the cohesive force as a feedstock for the three-dimensional printing.
결합제는 구형 분체화된 오스테나이트계 스테인레스 금속 분말 간의 결합력이 낮아 3차원 프린팅 과정에서 필요한 응집력을 확보하기 위해 첨가되는 주쇄(backbone) 바인더로서, 폴리스틸렌(Polystyrene), 폴리에틸렌(Polyethylene), 폴리프로필렌(polypropylene), 에틸렌비닐아세테이트(Ethylene-vinylacetate), 에틸렌에틸아크릴레이트(Ethylene-ethylacrylate), 메틸메타아크릴레이트(Methal-methacrylate), 부틸메타아크릴레이트(Butyl-methacrylate)으로 이루어진 그룹에서 선택된 1종 이상의 공중합체가 포함할 수 있다. 특히, 오스나이트계 스테인레스 금속 분말에 첨가되는 결합제로는 폴리에틸렌 공중합체인 것이 바람직한데, 폴리에틸렌 공중합체는 고온에서 제거되는 한편, 열간 탈지 공정을 거친 강(鋼)제품이 형상을 유지시킨다. 상기 폴리에틸렌 공중합체는 금속 분말 함유 조성물 전체 중량에 대해 3 내지 5중량%가 포함되는 것이 바람직하다.The binder is a backbone binder added to secure cohesion necessary in the three-dimensional printing process due to the low binding strength between the spherical powdered austenitic stainless metal powder. Polystyrene, polyethylene, and polypropylene ), Ethylene vinyl acetate (Ethylene-vinylacetate), ethylene ethyl acrylate (Ethylene-ethylacrylate), methyl methacrylate (Methal-methacrylate), at least one copolymer selected from the group consisting of butyl methacrylate (Butyl-methacrylate) It may include. Particularly, the binder added to the austenite-based stainless metal powder is preferably a polyethylene copolymer. The polyethylene copolymer is removed at a high temperature while the steel product subjected to the hot degreasing process maintains its shape. The polyethylene copolymer is preferably contained 3 to 5% by weight based on the total weight of the metal powder-containing composition.
가소제는 오스테나이트계 스테인레스 금속 분말과 결합제의 결합으로 응집된 조성물에 첨가되어 3D 프린팅 시 성형 가공을 용이하게 하는 유기물질로서, 마이크로크리스탈라인 왁스(Microcrystalline wax), 파라핀 왁스(Paraffin wax), 몬탄 왁스(Montan wax) 등이 이용될 수 있다. 특히, 본 발명에서는 가소제로서 비교적 저온에서도 고분자 바인더 간의 결합력을 낮춰 연성을 높일 수 있는 파라핀 왁스(Paraffin Wax)를 첨가한다. 상기 파라핀 왁스는 금속 분말 함유 조성물 전체 중량에 대해 2.5 내지 3.5중량%가 포함되는 것이 바람직하다.Plasticizer is an organic substance that is added to the agglomerated composition by combining austenitic stainless metal powder and binder to facilitate the molding process during 3D printing. Microcrystalline wax, paraffin wax, montan wax (Montan wax) and the like can be used. In particular, the present invention adds a paraffin wax (Paraffin Wax) that can increase the ductility by lowering the bonding strength between the polymer binder at a relatively low temperature as a plasticizer. The paraffin wax is preferably included 2.5 to 3.5% by weight relative to the total weight of the metal powder-containing composition.
윤활제는 금속 분말 함유 조성물이 원료 공급기 내에서 용융된 후 가압 사출 시에 표면 미끄럼성을 좋게 하여 공급 유도관을 경유하는 3차원 프린터(200)의 압출 헤드(210)로의 공급이 원할하게 이루지도록 첨가하는 성분으로서, 스테아린산(Stearic acid), 오레인산(Oleic acid), 팔미틴산(Palmitic acid), 리노레인산(Linolenic acid) 등이 이용될 수 있으나, 본 발명에서는 스테아린산을 첨가한다. 상기 스테아린산은 금속 분말 함유 조성물 전체 중량에 대해 0.5 내지 1.5중량%가 포함되는 것이 바람직하다.The lubricant is added so that the metal powder-containing composition is melted in the raw material feeder, so that the surface sliding property is good at the time of press injection, so that the supply to the extrusion head 210 of the three-dimensional printer 200 via the feed guide pipe is made smooth. As the component to stearic acid (Stearic acid), oleic acid (Oleic acid), palmitic acid (Palmitic acid), linolenic acid (Linolenic acid) and the like can be used, in the present invention, stearic acid is added. The stearic acid is preferably contained 0.5 to 1.5% by weight based on the total weight of the metal powder-containing composition.
상술한 조성 1 또는 조성 2의 성분 및 함량비를 갖는 오스테나이트계 스테인레스 금속 분말과, 고분자 바인더를 고분자 바인더에 포함된 결합제인 폴리에틸렌 공중합체가 완전히 용융되는 온도인 170℃의 고온에서 1시간 동안 균일하게 혼련한 후, 이를 상온까지 냉각한다. 이렇게 가열 혼련 후 냉각된 혼합물은 분쇄기 또는 펠렛타이저에서 분쇄되고 일정 입도를 갖는 펠렛(Pellet)으로 조립화(造粒化)됨으로써, 금속 분말 함유 조성물이 최종적으로 제조될 수 있다.The austenitic stainless metal powder having the components and the content ratios of the above-mentioned composition 1 or composition 2 and the polyethylene copolymer, which is a binder included in the polymer binder, are uniformly melted at a high temperature of 170 ° C. for 1 hour. After kneading, it is cooled to room temperature. The cooled mixture after the heat kneading is pulverized in a pulverizer or pelletizer and granulated into pellets having a certain particle size, whereby a metal powder-containing composition can be finally produced.
금속 분말과 고분자 바인더가 혼합된 3차원 프린팅용 금속원료가 원료 저장호퍼부재(100)의 내부로 장입되어 원료 저장호퍼부재(100)의 원료 배출부로 배출된다.The three-dimensional printing metal raw material mixed with the metal powder and the polymer binder is charged into the raw material storage hopper member 100 and discharged to the raw material discharge part of the raw material storage hopper member 100.
원료 저장호퍼부재(100)는 하부에 원료 배출부가 구비되며, 원료 배출부는 원료 저장호퍼부재(100)의 본체 하부에 배출관 형태로 돌출되며 3차원 프린팅 노즐 헤드(10)에 연결되어 3차원 프린팅 노즐 헤드(10)로 3차원 프린팅용 금속원료를 공급한다. 이때, 원료 저장호퍼부재(100)에는 조성 1 또는 조성 2의 성분 및 함량비를 갖는 오스테나이트계 스테인레스 금속 분말과, 고분자 바인더가 170℃ 이상의 온도에서 혼련된 후 조립화된 펠렛(Pellet)이 내부에 장입되어 있을 수 있다.The raw material storage hopper member 100 is provided with a raw material discharge portion at the lower portion, the raw material discharge portion protrudes in the form of discharge pipe in the lower part of the main body of the raw material storage hopper member 100 and is connected to the three-dimensional printing nozzle head 10 is a three-dimensional printing nozzle The metal material for three-dimensional printing is supplied to the head 10. At this time, the raw material storage hopper member 100 has an austenitic stainless metal powder having a composition and content ratio of composition 1 or 2, and pellets assembled after the polymer binder is kneaded at a temperature of 170 ° C. or higher. May be charged to.
3차원 프린팅 노즐 헤드(10)의 하부에는 3차원 프린팅용 금속원료를 압출시켜 2차원 평면형태(프린트 층)를 플레이트 상에 반복적으로 적층하여 인쇄하고자 하는 대상의 3차원 형상을 갖는 제품을 성형하는 노즐부가 구비된다.In the lower part of the three-dimensional printing nozzle head 10, a three-dimensional printing metal raw material is extruded, and a two-dimensional planar shape (print layer) is repeatedly laminated on a plate to form a product having a three-dimensional shape of an object to be printed. The nozzle unit is provided.
즉, 3차원 프린팅 노즐 헤드(10)는 원료 저장호퍼부재(100)로부터 공급받은 3차원 프린팅용 금속원료를 노즐부로 압출시켜 2차원 평면형태(프린트 층)를 플레이트 상에 반복적으로 적층하여 인쇄하고자 하는 대상의 3차원 형상을 갖는 제품을 성형한다.That is, the three-dimensional printing nozzle head 10 is to extrude the three-dimensional printing metal raw material supplied from the raw material storage hopper member 100 to the nozzle unit to repeatedly laminate the two-dimensional planar shape (print layer) on the plate to print A product having a three-dimensional shape of an object is molded.
한편, 원료 저장호퍼부재(100)의 내부에는 3차원 프린팅용 금속원료를 상기 원료 배출부(120)로 하향 이송시키는 원료 이송용 스크류부재(200)가 세워져 배치된다.On the other hand, inside the raw material storage hopper member 100, the raw material conveying screw member 200 for transferring the three-dimensional printing metal raw material to the raw material discharge portion 120 is placed upright.
원료 이송용 스크류부재(200)는 회전 가능하게 원료 저장호퍼부재(100)의 내부에 세워져 설치되고, 외주면에 회전 시 3차원 프린팅용 금속원료를 원료 배출부(120)로 하향 이송시키는 나선형 날개부가 구비된다. Screw member 200 for the raw material feed is rotatably installed inside the raw material storage hopper member 100, the spiral wing portion for transferring the three-dimensional printing metal raw material to the raw material discharge portion 120 when rotating on the outer peripheral surface It is provided.
원료 이송용 스크류부재(200)는 스크류 회전기기(300)에 의해 회전되며, 스크류 회전기기(300)는 전기전원을 공급받아 회전력을 발생시키는 제1회전모터를 포함하며, 제1회전모터의 회전력을 원료 이송용 스크류부재(200)로 전달하여 원료 이송용 스크류부재(200)를 회전시키는 제1회전력 전달부를 더 포함할 수 있다.The screw member 200 for raw material conveyance is rotated by the screw rotating device 300, the screw rotating device 300 includes a first rotary motor for generating a rotational force by receiving electric power, the rotational force of the first rotary motor It may further include a first power transmission for transmitting the raw material conveying screw member 200 to rotate the raw material conveying screw member 200.
제1회전력 전달부는 회전력을 전달하는 공지의 벨트 구조, 기어 구조 등을 다양하게 변형 실시할 수 있으며, 구체적인 구성은 하기에서 더 상세하게 설명한다. The first rotational power transmission unit may be variously modified in a known belt structure, a gear structure, and the like to transmit the rotational force, and a detailed configuration will be described in more detail below.
원료 이송용 스크류부재(200)는 하단부가 원료 저장호퍼부재(100)의 배출구와 이격되도록 위치되며 스크류 회전기기(300)에 의해 회전되어 원료 저장호퍼부재(100) 내에 저장된 3차원 프린팅용 금속원료를 배출구로 이송시킨다.The raw material transfer screw member 200 is positioned so that the lower end is spaced apart from the outlet of the raw material storage hopper member 100 and is rotated by the screw rotating device 300 to store the three-dimensional printing metal raw material in the raw material storage hopper member 100. To the outlet.
3차원 프린팅용 금속원료는 원료 이송용 스크류부재(200)의 회전에 의해 원료 저장호퍼부재(100)의 배출구 측으로 이송되어 원료 배출부를 통해 3차원 프린팅 노즐 헤드(10) 내로 공급된다.The three-dimensional printing metal raw material is transferred to the outlet side of the raw material storage hopper member 100 by the rotation of the raw material transporting screw member 200 and is supplied into the three-dimensional printing nozzle head 10 through the raw material discharge part.
도 2는 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 다른 실시 예를 도시한 단면도이고, 도 3은 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 다른 실시 예에서 회전 내통부재(400)의 일 실시 예를 도시한 단면 사시도이다.2 is a cross-sectional view showing another embodiment of the three-dimensional printing metal powder raw material supply apparatus according to the present invention, Figure 3 is a rotating inner cylinder member in another embodiment of the three-dimensional printing metal powder raw material supply apparatus according to the present invention A cross-sectional perspective view of one embodiment of 400.
본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 다른 실시 예는 원료 저장호퍼부재(100)의 내측에 회전 가능하게 장착되며 3차원 프린팅용 금속원료를 상향 이송시키는 상향 이송용 나선형돌기부(410)가 내주면에 구비된 회전 내통부재(400)를 더 포함할 수 있다.Another embodiment of the three-dimensional printing metal powder raw material supply apparatus according to the present invention is rotatably mounted inside the raw material storage hopper member 100 and the upward transfer spiral projection 410 for conveying the three-dimensional printing metal raw material upward ) May further include a rotating inner cylinder member 400 provided on the inner circumferential surface.
원료 저장호퍼부재(100)는 원통형으로 형성된 본체부, 본체부의 하부에 콘형상으로 형성된 콘몸체부, 콘몸체부의 중앙에서 배출구와 연통된 원료 배출부(120)를 포함한다.The raw material storage hopper member 100 includes a main body portion formed in a cylindrical shape, a cone body portion formed in a cone shape at a lower portion of the main body portion, and a raw material discharge portion 120 communicating with an outlet at the center of the cone body portion.
회전 내통부재(400)는 본체부의 내주면에 회전 가능하게 설치되어 회전모터의 회전력을 전달받아 회전되며, 별도의 회전기기로 회전될 수 있고, 스크류 회전기기(300)의 회전모터로부터 회전력을 전달받아 회전되는 것을 일 예로 한다.Rotating inner cylinder member 400 is rotatably installed on the inner circumferential surface of the main body portion is rotated by receiving the rotational force of the rotating motor, can be rotated by a separate rotating device, receiving the rotational force from the rotating motor of the screw rotating device 300 For example, it is rotated.
스크류 회전기기(300)는 제1회전모터의 회전력을 회전 내통부재(400)로 전달하여 회전 내통부재(400)를 회전시키는 제2회전력 전달부(320)를 더 포함할 수 있다.The screw rotating device 300 may further include a second rotational power transmission unit 320 for transmitting the rotational force of the first rotating motor to the rotating inner cylinder member 400 to rotate the rotating inner cylinder member 400.
제1회전모터는 원료 저장호퍼부재(100)의 외측에 구비되는 모터 받침대 상에 장착되어 고정되고, 제1회전력 전달부(310)와 제2회전력 전달부(320)를 통해 각각 원료 이송용 스크류부재(200)와 회전 내통부재(400)를 회전시킨다.The first rotary motor is mounted and fixed on the motor support provided on the outer side of the raw material storage hopper member 100, and each of the screw for raw material transfer through the first power transmission unit 310 and the second power transmission unit 320 The member 200 and the rotating inner cylinder member 400 are rotated.
제1회전력 전달부(310)는 제1회전모터의 샤프트에 장착되는 제1벨트풀리(311), 원료 이송용 스크류부재(200)의 외주면에 구비되는 제2벨트풀리(312), 제1벨트풀리(311)와 제2벨트풀리(312)에 양단부가 각각 감기는 제1벨트(313)를 포함한다.The first rotational power transmission unit 310 is the first belt pulley 311 is mounted to the shaft of the first rotary motor, the second belt pulley 312, the first belt provided on the outer peripheral surface of the screw member 200 for raw material transfer A first belt 313 is wound around both ends of the pulley 311 and the second belt pulley 312.
또한, 제2회전력 전달부(320)는 제1회전모터의 샤프트에 제1벨트풀리(311)와 이격되게 장착되는 제3벨트풀리(321), 회전 내통부의 외주면에 구비되는 제4벨트풀리(322), 제3벨트풀리(321)와 제4벨트풀리(322)에 양단부가 각각 감기는 제2벨트(323)를 포함한다.In addition, the second rotational power transmission unit 320 is a third belt pulley 321 mounted to the shaft of the first rotating motor to be spaced apart from the first belt pulley 311, the fourth belt pulley provided on the outer circumferential surface of the rotating inner cylinder ( 322, the second belt pulley 321 and the fourth belt pulley 322 includes a second belt 323 wound at both ends, respectively.
제1회전력 전달부(310)와 제2회전력 전달부(320)는 제1벨트(313)와 제2벨트(323)를 통해 제1회전모터의 회전력을 안정적으로 전달하여 원료 이송용 스크류부재(200)와 회전 내통부재(400)가 안정적으로 회전될 수 있도록 한다. The first rotational power transmission unit 310 and the second rotational power transmission unit 320 stably transmits the rotational force of the first rotary motor through the first belt 313 and the second belt 323 to feed the screw member ( 200 and the inner cylinder member 400 to be stably rotated.
원료 저장호퍼부재(100)의 내주면과 회전 내통부재(400)의 외주면 사이에는 베어링이 배치되어 회전 내통부재(400)가 원활하게 회전될 수 있도록 한다. A bearing is disposed between the inner circumferential surface of the raw material storage hopper member 100 and the outer circumferential surface of the rotating inner cylinder member 400 so that the rotating inner cylinder member 400 can be smoothly rotated.
또한, 상향 이송용 나선형돌기부(410)는 링형상의 나선형 돌기로 회전 내통부재(400)가 회전될 때 3차원 프린팅용 금속원료를 상향 이송시킬 수 있도록 회전 내통부재(400)의 내주면을 따라 나선형으로 돌출되게 구비되는 것으로 링형상의 나선형 돌기로 형성된다.In addition, the upward transfer spiral projection 410 is a spiral spiral along the inner circumference of the rotating inner cylinder member 400 so that when the rotating inner cylinder member 400 is rotated by a ring-shaped spiral projection to upwardly convey the three-dimensional printing metal raw material. It is provided to protrude into a ring-shaped spiral projection is formed.
원료 이송용 스크류부재(200)는 원료 저장호퍼부재(100)의 중심에 배치되는 원료 배출부(120)의 수직 상부에 배치되며 원료 배출부(120)의 내경보다 큰 외경의 회전축을 구비하여 원료 저장호퍼부재(100) 내의 3차원 프린팅용 금속원료를 원료 배출부(120)로 안정적으로 이송될 수 있게 한다.The raw material conveying screw member 200 is disposed on a vertical upper portion of the raw material discharge part 120 disposed at the center of the raw material storage hopper member 100 and has a rotating shaft having an outer diameter larger than the inner diameter of the raw material discharge part 120. The three-dimensional printing metal raw material in the storage hopper member 100 can be stably transferred to the raw material discharge part 120.
상향 이송용 나선형돌기부(410)의 상부면과 하부면에는 각각 교반용 돌기(411)가 돌출될 수 있다.Agitating protrusions 411 may protrude from upper and lower surfaces of the upwardly feeding spiral protrusion 410, respectively.
또한, 교반용 돌기(411)는 상향 이송용 나선형돌기부(410)의 상부면과 하부면에 각각 구비되되, 상부면과 하부면에서 서로 엇갈리는 위치로 즉, 서로 이격되게 배치되어 교반 효율을 향상시키도록 한다.In addition, the stirring projection 411 is provided on the upper surface and the lower surface of the upwardly conveying spiral projection 410, respectively, in a position alternated with each other on the upper surface and the lower surface, that is spaced apart from each other to improve the stirring efficiency To do that.
즉, 상부면에 구비되는 교반용 돌기(411)는 하부면에 구비되는 교반용 돌기(411)의 사이에 배치되고, 하부면에 구비되는 교반용 돌기(411)는 상부면에 구비되는 교반용 돌기(411)의 사이에 배치된다.That is, the stirring protrusion 411 provided on the upper surface is disposed between the stirring protrusions 411 provided on the lower surface, and the stirring protrusion 411 provided on the lower surface is used for the stirring provided on the upper surface. It is arranged between the projections 411.
교반용 돌기(411)는 상향 이송용 나선형돌기부(410)에 의해 3차원 프린팅용 금속원료가 상부 측으로 이송될 때 3차원 프린팅용 금속원료가 포함하는 금속 분말과 고분자 바인더가 고르게 혼합될 수 있도록 한다.The stirring protrusion 411 allows the metal powder and the polymer binder included in the 3D printing metal raw material to be evenly mixed when the 3D printing metal raw material is transferred to the upper side by the upward transfer spiral protrusion 410. .
또한 도시하지는 않았지만 나선형 날개부에 교반용 돌기(411)가 이격되게 복수로 구비되어 3차원 프린팅용 금속원료가 원료 배출부(120) 측으로 하향 이송될 때 3차원 프린팅용 금속원료가 포함하는 금속 분말과 고분자 바인더가 더 고르게 혼합될 수 있도록 한다.In addition, although not shown, a plurality of stirring projections 411 are provided in the spiral wing spaced apart, the metal powder included in the three-dimensional printing metal raw material when the three-dimensional printing metal raw material is transferred downward to the raw material discharge portion 120 side. And the polymer binder can be mixed more evenly.
한편, 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치는 원료 배출부(120)의 수직방향으로 세워져 배치되며 외주면에 원료 이송용 스크류부재(200)가 회전 가능하게 장착되며 길이방향으로 관통된 축결합구멍(510)이 구비된 회전 지지축부재(500), 회전 지지축부재(500)를 원료 저장호퍼부재(100)의 상부에서 고정하는 축지지대(110), 회전 지지축부재(500)를 관통하여 회전 가능하게 결합되고 원료 이송용 스크류부재(200)의 하부로 돌출되고 돌출된 부분에 3차원 프린팅용 금속원료를 하향 이송시키는 나선형 돌기부가 구비된 배출용 스크류부재(600), 배출용 스크류부재(600)를 회전시키는 제2회전모터(700)를 더 포함할 수 있다.On the other hand, the three-dimensional printing metal powder raw material supply apparatus according to the present invention is placed in the vertical direction of the raw material discharge portion 120 and the screw member 200 for the raw material transport rotatably mounted on the outer peripheral surface and penetrated in the longitudinal direction Rotation support shaft member 500 and the rotation support shaft member 500 is provided with a shaft coupling hole 510 at the upper portion of the raw material storage hopper member 100, the rotary support shaft member 500 Discharge screw member 600 with a spiral protrusion which is rotatably coupled to pass through and protrudes downward of the raw material transport screw member 200 and has a spiral projection for downwardly transporting the three-dimensional printing metal raw material. It may further include a second rotary motor 700 for rotating the screw member 600.
배출용 스크류부재(600)는 나선형 돌기부가 구비된 부분이 원료 배출부(120) 내로 배치되어 원료 배출부(120)를 통해 3차원 프린팅용 금속원료를 3차원 프린팅 노즐 헤드(10) 내로 안정적으로 공급시킨다. Discharge screw member 600 is a portion having a spiral projection is disposed in the raw material discharge portion 120 to stably feed the three-dimensional printing metal raw material into the three-dimensional printing nozzle head 10 through the raw material discharge portion 120. Supply it.
축지지대(110)는 원료 저장호퍼부재(100)의 본체에 설치되어 고정되는 것을 일 예로 한다. The shaft support 110 is an example of being installed and fixed to the body of the raw material storage hopper member 100.
또한, 배출용 스크류부재(600)는 원료 배출부(120)를 관통하여 하단부가 3차원 프린팅 노즐 헤드(10)의 내부로 일부 돌출되게 구비되어 3차원 프린팅용 금속원료를 3차원 프린팅 노즐 헤드(10) 내로 안정적으로 공급시킨다.In addition, the discharging screw member 600 is provided to penetrate through the raw material discharge portion 120 so that the lower end portion partially protrudes into the three-dimensional printing nozzle head 10 to supply the three-dimensional printing metal raw material to the three-dimensional printing nozzle head ( 10) Stable supply into.
본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치는 축지지대(110) 상에 장착되며 배출용 스크류부재(600)를 상, 하 이동시키는 스크류 승하강기기(800)를 더 포함할 수 있다. The three-dimensional printing metal powder raw material supply apparatus according to the present invention may further include a screw lifting device 800 mounted on the shaft support 110 and moving the discharge screw member 600 up and down.
스크류 승하강기기(800)는 배출용 스크류부재(600)를 상, 하 이동시켜 원료 배출부(120)를 통해 3차원 프린팅용 금속원료를 3차원 프린팅 노즐 헤드(10) 내로 더 안정적으로 공급시킨다.The screw lifting device 800 moves the discharge screw member 600 up and down to more stably supply the three-dimensional printing metal raw material into the three-dimensional printing nozzle head 10 through the raw material discharge part 120. .
스크류 승하강기기(800)는 배출용 스크류부재(600)를 상, 하 이동시켜 원료 배출부(120)의 주변에서 3차원 프린팅용 금속원료가 뭉쳐지는 것을 방지하고, 배출용 스크류부재(600)로 3차원 프린팅용 금속원료를 원활하게 3차원 프린팅 노즐 헤드(10) 내로 안정적으로 공급시킨다.The screw lifting device 800 moves the discharge screw member 600 up and down to prevent the three-dimensional printing metal raw materials from agglomeration around the raw material discharge part 120, and the screw member 600 for discharge. The 3D printing metal raw material can be stably supplied into the 3D printing nozzle head 10 smoothly.
스크류 승하강기기(800)는 제2회전모터(700)가 장착되는 모터받침플레이트(710)를 상, 하 이동시키는 유압 실린더인 것을 일 예로 하며, 이외에도 배출용 스크류부재(600)를 상, 하 이동시킬 수 있는 공지의 승하강 구조를 이용하여 다양하게 변형실시할 수 있음을 밝혀둔다. The screw lifting device 800 is an example of a hydraulic cylinder for moving the motor support plate 710 on which the second rotary motor 700 is mounted up and down. In addition, the screw member 600 for discharging up and down is provided. It turns out that various modifications can be made by using a known lifting structure that can be moved.
도 4는 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치의 다른 실시 예의 작동 예를 도시한 도면이다.4 is a view showing an operation example of another embodiment of a three-dimensional printing metal powder raw material supply apparatus according to the present invention.
도 4를 참고하면 본 발명에 따른 3차원 프린트용 금속 분말 원료 공급 장치는 회전 내통부재(400)가 회전하면서 3차원 프린팅용 금속원료를 상향 이송시키고, 원료 이송용 스크류부재(200)가 회전하면서 3차원 프린팅용 금속원료를 하향 이송시켜 원료 배출부(120)를 통해 배출시키므로 3차원 프린팅용 금속원료가 원료 저장호퍼부재(100)의 내부에서 충분히 섞인 후 배출될 수 있다. Referring to Figure 4, the three-dimensional printing metal powder raw material supply apparatus according to the present invention, while rotating the inner cylinder member 400 rotates the three-dimensional printing metal raw material upward, the raw material conveying screw member 200 while rotating Since the three-dimensional printing metal raw material is transported downward and discharged through the raw material discharging unit 120, the three-dimensional printing metal raw material may be discharged after being sufficiently mixed in the raw material storage hopper member 100.
즉, 3차원 프린팅용 금속원료는 회전 내통부재(400)의 회전 시 상향 이송용 나선형돌기부(410)로 상향 이송한 후 원료 저장호퍼부재(100)의 중심에서 원료 이송용 스크류부재(200)에 의해 하향 이송하게 되어 금속 분말과 고분자 바인더가 더 고르게 혼합되면서 원료 배출부(120)로 배출될 수 있다.That is, the three-dimensional printing metal raw material is upwardly transferred to the upwardly conveying spiral protrusion 410 when the rotating inner cylinder member 400 is rotated, and then to the screw member 200 for raw material conveying at the center of the raw material storage hopper member 100. As it is conveyed downward by the metal powder and the polymer binder is more evenly mixed may be discharged to the raw material outlet 120.
또한, 3차원 프린팅용 금속원료는 원료 배출부(120) 내에 배치되며 회전하면서 상, 하 이동하는 배출용 스크류부재(600)에 의해 뭉침없이 원활하게 원료 배출부(120)로 배출되어 3차원 프린팅 노즐 헤드(10) 내로 안정적으로 공급된다. In addition, the three-dimensional printing metal raw material is disposed in the raw material discharge portion 120 and is discharged to the raw material discharge portion 120 smoothly without aggregation by the screw member 600 for moving up and down while rotating, three-dimensional printing The nozzle head 10 is stably supplied.
본 발명은 금속 분말과 고분자 바인더가 혼합된 3차원 프린팅용 금속원료를 고르게 혼합하여 3차원 프린팅 노즐 헤드(10)의 내부로 원활하게 공급하여 금속 분말이 포함된 금속원료로 3차원 프린팅 시 불량률을 최소화한다. The present invention evenly mixed with the metal powder for the three-dimensional printing mixed with the metal powder and the polymer binder is smoothly supplied to the interior of the three-dimensional printing nozzle head 10 to reduce the defect rate during the three-dimensional printing with the metal raw material containing the metal powder Minimize.
또한 본 발명은 금속 분말과 고분자 바인더를 고르게 혼합하여 3차원 프린팅 노즐로 원활하게 공급하도록 하여 3차원 프린팅으로 기계적 물성이 우수하고 높은 정밀도를 요구하는 금속 제품을 성형할 수 있도록 한다.In addition, the present invention by mixing the metal powder and the polymer binder evenly to be smoothly supplied to the three-dimensional printing nozzle to enable the three-dimensional printing to form a metal product having excellent mechanical properties and high precision.
본 발명은 상기한 실시 예에 한정되는 것이 아니라, 본 발명의 요지에 벗어나지 않는 범위에서 다양하게 변경하여 실시할 수 있으며 이는 본 발명의 구성에 포함됨을 밝혀둔다.The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the gist of the present invention, which is understood to be included in the configuration of the present invention.

Claims (11)

  1. 3차원 프린터의 3차원 프린팅 노즐 헤드의 내부로 금속 분말과 고분자 바인더가 혼합된 3차원 프린팅용 금속원료를 공급하는 3차원 프린트용 금속 분말 원료 공급 장치이며, It is a three-dimensional printing metal powder raw material supply device for supplying a three-dimensional printing metal raw material mixed with a metal powder and a polymer binder into the three-dimensional printing nozzle head of the three-dimensional printer,
    상기 3차원 프린팅 노즐 헤드 상에 장착되며 내부에 상기 3차원 프린팅용 금속원료가 저장되고, 하부에 상기 3차원 프린팅용 금속원료를 상기 3차원 프린팅 노즐 헤드의 내부로 유입시키는 원료 배출부가 구비된 원료 저장호퍼부재;A raw material mounted on the three-dimensional printing nozzle head and having a raw material discharge part for storing the three-dimensional printing metal material therein and introducing the three-dimensional printing metal material into the lower portion of the three-dimensional printing nozzle head; A storage hopper member;
    상기 원료 저장호퍼부재의 내부에 세워져 회전 가능하게 설치되며 외주면에 나선형 날개부가 구비되어 상기 3차원 프린팅용 금속원료를 상기 원료 배출부로 하향 이송시키는 원료 이송용 스크류부재; 및A raw material conveying screw member mounted inside the raw material storage hopper member and rotatably installed and provided with a spiral wing on an outer circumferential surface to transfer the three-dimensional printing metal raw material downward to the raw material discharge part; And
    상기 원료 이송용 스크류부재를 회전시키는 스크류 회전기기를 포함하는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.Three-dimensional printing metal powder raw material supply apparatus comprising a screw rotating device for rotating the screw member for transferring the raw material.
  2. 청구항 1에 있어서, The method according to claim 1,
    상기 원료 저장호퍼부재의 내측에 회전 가능하게 장착되며 상기 3차원 프린팅용 금속원료를 상향 이송시키는 상향 이송용 나선형돌기부가 내주면에 구비된 회전 내통부재를 더 포함하는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.It is rotatably mounted inside the raw material storage hopper member and the three-dimensional printing metal, characterized in that it further comprises a rotating inner cylinder member provided on the inner circumferential surface for the upward transfer spiral projection for conveying the three-dimensional printing metal raw material up Powder raw material feeding device.
  3. 청구항 2에 있어서, The method according to claim 2,
    상기 회전 내통부재는 상기 스크류 회전기기의 회전모터로부터 회전력을 전달받아 회전되는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.The rotating inner cylinder member is a three-dimensional printing metal powder raw material supply device, characterized in that the rotating by receiving a rotational force from the rotating motor of the screw rotating machine.
  4. 청구항 3에 있어서, The method according to claim 3,
    상기 스크류 회전기기는,The screw rotating machine,
    전기전원을 공급받아 회전력을 발생시키는 제1회전모터;A first rotating motor configured to generate electric power by receiving electric power;
    상기 제1회전모터의 회전력을 원료 이송용 스크류부재로 전달하여 원료 이송용 스크류부재를 회전시키는 제1회전력 전달부; 및 A first rotational power transmission unit which rotates the raw material conveying screw member by transmitting the rotational force of the first rotating motor to the raw material conveying screw member; And
    상기 제1회전모터의 회전력을 회전 내통부재로 전달하여 원료 이송용 스크류부재를 회전시키는 제2회전력 전달부를 더 포함하는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.3D printing metal powder raw material supply apparatus further comprises a second rotational power transmission unit for transmitting the rotational force of the first rotary motor to the rotating inner cylinder member to rotate the screw material for conveying the raw material.
  5. 청구항 4에 있어서, The method according to claim 4,
    상기 제1회전력 전달부는,The first power transmission unit,
    상기 제1회전모터의 샤프트에 장착되는 제1벨트풀리;A first belt pulley mounted to the shaft of the first rotating motor;
    상기 원료 이송용 스크류부재의 외주면에 구비되는 제2벨트풀리; 및 A second belt pulley provided on an outer circumferential surface of the screw member for transferring the raw material; And
    상기 제1벨트풀리와 상기 제2벨트풀리에 양단부가 각각 감기는 제1벨트를 포함하며, A first belt having both ends wound around the first belt pulley and the second belt pulley,
    상기 제2회전력 전달부는, 상기 제1회전모터의 샤프트에 상기 제1벨트풀리와 이격되게 장착되는 제3벨트풀리;The second rotational power transmission unit, a third belt pulley mounted on the shaft of the first rotary motor to be spaced apart from the first belt pulley;
    상기 회전 내통부의 외주면에 구비되는 제4벨트풀리; 및A fourth belt pulley provided on an outer circumferential surface of the rotating inner cylinder portion; And
    상기 제3벨트풀리와 상기 제4벨트풀리에 양단부가 각각 감기는 제2벨트를 포함하는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.And a second belt having both ends wound around the third belt pulley and the fourth belt pulley, respectively.
  6. 청구항 2에 있어서,The method according to claim 2,
    상기 상향 이송용 나선형 돌기부의 상부면과 하부면에는 각각 교반용 돌기가 돌출되는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.A three-dimensional printing metal powder raw material supply device, characterized in that the stirring projection protrudes on the upper surface and the lower surface of the spiral projection for upward transfer.
  7. 청구항 6에 있어서, The method according to claim 6,
    상기 교반용 돌기는 상기 상향 이송용 나선형 돌기부의 상부면과 하부면에 각각 구비되되, 상부면과 하부면에서 서로 엇갈리게 위치되는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.The stirring projection is provided on the upper surface and the lower surface of the spiral projection for upward transfer respectively, three-dimensional printing metal powder raw material supply apparatus, characterized in that the staggered position is located on each other.
  8. 청구항 2에 있어서, The method according to claim 2,
    상기 원료 배출부는 상기 원료 저장호퍼부재의 하부에 배출관 형태로 돌출되며,The raw material discharge portion protrudes in the form of discharge pipe in the lower portion of the raw material storage hopper member,
    상기 원료 배출부의 수직방향으로 세워져 배치되며 외주면에 상기 원료 이송용 스크류부재가 회전 가능하게 장착되며 길이방향으로 관통된 축결합구멍이 구비된 회전 지지축부재; A rotary support shaft member which is disposed in the vertical direction of the raw material discharge part and is rotatably mounted on an outer circumferential surface thereof and has a axial coupling hole penetrated in a longitudinal direction;
    상기 회전 지지축부재를 상기 원료 저장호퍼부재의 상부에서 고정하는 축지지대;A shaft support fixing the rotating support shaft member at an upper portion of the raw material storage hopper member;
    상기 회전 지지축부재를 관통하여 회전 가능하게 결합되고 상기 원료 이송용 스크류부재의 하부로 돌출되고 돌출된 부분에 3차원 프린팅용 금속원료를 하향 이송시키는 나선형 돌기부가 구비된 배출용 스크류부재; 및 A discharge screw member having a spiral protrusion rotatably coupled to the rotating support shaft member, the spiral protrusion protruding downward from the raw material conveying screw member and downwardly conveying the three-dimensional printing metal raw material; And
    상기 배출용 스크류부재를 회전시키는 제2회전모터를 더 포함하는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.3D printing metal powder raw material supply apparatus further comprises a second rotating motor for rotating the discharge screw member.
  9. 청구항 8에 있어서,The method according to claim 8,
    상기 배출용 스크류부재는 나선형 돌기부가 구비된 부분이 배출부 내로 배치되는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.The discharging screw member is a three-dimensional printing metal powder raw material supply device, characterized in that the portion provided with a spiral projection is disposed in the discharge portion.
  10. 청구항 9에 있어서, The method according to claim 9,
    상기 배출용 스크류부재는 배출부를 관통하여 하단부가 3차원 프린팅 노즐 헤드의 내부로 일부 돌출되게 구비되는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.The discharging screw member is a three-dimensional printing metal powder raw material supply device characterized in that the lower portion is provided through the discharge portion protrudes into the interior of the three-dimensional printing nozzle head.
  11. 청구항 8에 있어서, The method according to claim 8,
    상기 축지지대 상에 장착되며 배출용 스크류부재를 상, 하 이동시키는 스크류 승하강기기를 더 포함하는 것을 특징으로 하는 3차원 프린트용 금속 분말 원료 공급 장치.The three-dimensional printing metal powder raw material supply apparatus further comprises a screw lifting device for mounting on the shaft support for moving the discharge screw member up, down.
PCT/KR2016/011079 2016-10-04 2016-10-04 Device for supplying metal powder raw material for three-dimensional printing WO2018066721A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2016/011079 WO2018066721A1 (en) 2016-10-04 2016-10-04 Device for supplying metal powder raw material for three-dimensional printing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2016/011079 WO2018066721A1 (en) 2016-10-04 2016-10-04 Device for supplying metal powder raw material for three-dimensional printing

Publications (1)

Publication Number Publication Date
WO2018066721A1 true WO2018066721A1 (en) 2018-04-12

Family

ID=61832100

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/011079 WO2018066721A1 (en) 2016-10-04 2016-10-04 Device for supplying metal powder raw material for three-dimensional printing

Country Status (1)

Country Link
WO (1) WO2018066721A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108356269A (en) * 2018-05-04 2018-08-03 昆山卡德姆新材料科技有限公司 A kind of 3D printer handpiece and 3D printer
US20220097293A1 (en) * 2019-06-11 2022-03-31 Trelleborg Sealing Solutions Germany Gmbh 3d-printer system and 3d-printing method of an elastomerically deformable rubber body, in particular a rubber seal
US11731357B2 (en) 2017-10-05 2023-08-22 Hewlett-Packard Development Company, L.P. Chamber for storing build material

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500209A (en) * 1981-04-13 1985-02-19 Sevenson Company Feed mixing apparatus
KR100724600B1 (en) * 2006-05-29 2007-06-04 (주)흥원피앤엠 A mixing apparatus
KR20160011693A (en) * 2013-05-07 2016-02-01 코마도 쏘시에떼 아노님 Mixer, method of mixing raw material for powder metallurgy, binder for injection moulding composition
KR20160042716A (en) * 2014-10-10 2016-04-20 박노성 Countinuous type powder mixer
KR20160107769A (en) * 2015-03-05 2016-09-19 전남대학교산학협력단 Exchangeable extruder for three dimensional printer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500209A (en) * 1981-04-13 1985-02-19 Sevenson Company Feed mixing apparatus
KR100724600B1 (en) * 2006-05-29 2007-06-04 (주)흥원피앤엠 A mixing apparatus
KR20160011693A (en) * 2013-05-07 2016-02-01 코마도 쏘시에떼 아노님 Mixer, method of mixing raw material for powder metallurgy, binder for injection moulding composition
KR20160042716A (en) * 2014-10-10 2016-04-20 박노성 Countinuous type powder mixer
KR20160107769A (en) * 2015-03-05 2016-09-19 전남대학교산학협력단 Exchangeable extruder for three dimensional printer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11731357B2 (en) 2017-10-05 2023-08-22 Hewlett-Packard Development Company, L.P. Chamber for storing build material
CN108356269A (en) * 2018-05-04 2018-08-03 昆山卡德姆新材料科技有限公司 A kind of 3D printer handpiece and 3D printer
CN108356269B (en) * 2018-05-04 2024-03-22 昆山卡德姆新材料科技有限公司 3D printer head and 3D printer
US20220097293A1 (en) * 2019-06-11 2022-03-31 Trelleborg Sealing Solutions Germany Gmbh 3d-printer system and 3d-printing method of an elastomerically deformable rubber body, in particular a rubber seal
US11745414B2 (en) * 2019-06-11 2023-09-05 Trelleborg Sealing Solutions Germany Gmbh 3D-printer system and 3D-printing method of an elastomerically deformable rubber body, in particular a rubber seal

Similar Documents

Publication Publication Date Title
US10843263B2 (en) Composition containing metal powder for three-dimensional printing, three-dimensional printing method using same as raw material, and three-dimensional printing device
WO2018066721A1 (en) Device for supplying metal powder raw material for three-dimensional printing
CN101565550B (en) Nucleating agent master batches used for foaming of thermoplastic resin and its manufacture method
EP2321437B1 (en) Process for producing agglomerates of finely particulate iron carriers
WO2018066726A1 (en) Three-dimensional printing method using metal powder-containing composition as raw material
CN106683867A (en) Nano-crystalline anisotropic magnet prepared by 3D (three-dimensional) printing technique
CN103258610A (en) Magnetic plastic composite material and preparation method thereof
CN112206669A (en) Continuous conveying device based on multi-material in-place powder mixing
KR101433019B1 (en) Block manufacturing method using ferronickel slag and apparatus using the same
KR102203027B1 (en) Master batch for Antimicrobial film, preparation method of Antimicrobial film using the same and preparation method thereof
CN107686637A (en) High pressure resistant high temperature resistant composite and preparation method thereof
CN107671293A (en) The double shower nozzle powdered feed 3D printing equipments of one kind mixing extrusion continous way
CN207154779U (en) The double shower nozzle powdered feed 3D printing equipments of one kind mixing extrusion continous way
CN107556638A (en) A kind of method and extruder for preparing cable insulation
CN107672157A (en) A kind of side feeding 3D printing equipment and its printing shaping method
KR20160081781A (en) The balance weight for elevator and manufacturing system thereof
JP2677685B2 (en) Continuous toner manufacturing method
KR200491716Y1 (en) A cartridge for three dimensional printer supplying stick-type metal and ceramic material
CN113665100A (en) Co-rotating conical double-screw fused deposition modeling extrusion type 3D printing nozzle
WO2022139186A1 (en) Method for preparing feedstock for powder injection molding
CN102070914A (en) Inorganic particle-coated plastic granules and preparation method and application thereof
JP2004052002A (en) Method of reducing metal oxide, and resin solid material used in this method and forming equipment
JPH07106586B2 (en) Kneading injection molding method and apparatus for composite resin
WO2021132854A1 (en) Binder composition for metal powder injection molding
CN111138833A (en) 3D printing magnetic thermoplastic polyurethane elastomer material and preparation method and application thereof

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16918342

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16918342

Country of ref document: EP

Kind code of ref document: A1