SE540201C2 - A process and apparatus for making a three-dimensional object - Google Patents

A process and apparatus for making a three-dimensional object

Info

Publication number
SE540201C2
SE540201C2 SE1500245A SE1500245A SE540201C2 SE 540201 C2 SE540201 C2 SE 540201C2 SE 1500245 A SE1500245 A SE 1500245A SE 1500245 A SE1500245 A SE 1500245A SE 540201 C2 SE540201 C2 SE 540201C2
Authority
SE
Sweden
Prior art keywords
dispensing nozzle
filament
predetermined
discharge orifice
crafting medium
Prior art date
Application number
SE1500245A
Other versions
SE1500245A1 (en
Inventor
Moosberg Mats
Original Assignee
Ememo Solutions Ab
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 Ememo Solutions Ab filed Critical Ememo Solutions Ab
Priority to SE1500245A priority Critical patent/SE540201C2/en
Publication of SE1500245A1 publication Critical patent/SE1500245A1/en
Publication of SE540201C2 publication Critical patent/SE540201C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/40—Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/50—Means for feeding of material, e.g. heads
    • B22F12/53—Nozzles
    • 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
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/165—Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/307—Handling of material to be used in additive manufacturing
    • B29C64/321—Feeding
    • B29C64/336—Feeding of two or more materials
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/22—Driving means
    • B22F12/222—Driving means for motion along a direction orthogonal to the plane of a layer
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/22—Driving means
    • B22F12/224—Driving means for motion along a direction within the plane of a layer
    • 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
    • B33Y10/00—Processes of additive manufacturing
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6026—Computer aided shaping, e.g. rapid prototyping
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Powder Metallurgy (AREA)

Abstract

The present invention relates to a three-dimensional imaging process for making objects, preferably metal objects or ceramic objects, on a layer-by-layer basis under the control of a data processing system. The process includes the steps of (i) providing a supply of mold building material in filament form; (ii) providing a supply of crafting medium in paste form; (iii) providing a dual printhead including a first dispensing nozzle and a second dispensing nozzle; (iv) feeding the filament to enter one end of a flow passage of the first dispensing nozzle having a first discharge orifice on another end; (v) feeding the crafting medium to enter one end of a flow passage of the second dispensing nozzle having a second discharge orifice on another end; (vi) heating the first dispensing nozzle to convert a leading portion of the filament therein to a flowable fluid; (vii) dispensing the flowable fluid through the first discharge orifice to an object-supporting platform; (viii) during the dispensing step, moving the dual printhead and the object-supporting platform relative to one another in a plane defined by first and second directions and in a third direction orthogonal to said plane to form the flowable fluid into a three-dimensional hollow pattern having a molding cavity shaped in accordance with a predetermined threedimensional object; (ix) during the dispensing step, operating the second dispensing nozzle for extruding the crafting medium on a layer by layer basis through the second discharge orifice onto the three-dimensional hollow pattern in order to gradually fill the molding cavity, thereby forming the predetermined three-dimensional object; and (x) removing the threedimensional hollow pattern in order to release the predetermined three-dimensional object.The present invention further relates to an apparatus for performing the process.

Description

A process and an apparatus for making a three-dimensional object Abstract The present invention relates to a three-dimensional imaging process for making objects, preferably metal objects or ceramic objects, on a layer-by-layer basis under the control of a data processing system. The process includes the steps of (i) providing a supply of mold building material in filament form; (ii) providing a supply of crafting medium in paste form; (iii) providing a dual printhead including a first dispensing nozzle and a second dispensing nozzle; (iv) feeding the filament to enter one end of a flow passage of the first dispensing nozzle having a first discharge orifice on another end; (v) feeding the crafting medium to enter one end of a flow passage of the second dispensing nozzle having a second discharge orifice on another end; (vi) heating the first dispensing nozzle to convert a leading portion of the filament therein to a flowable fluid; (vii) dispensing the flowable fluid through the first discharge orifice to an object-supporting platform; (viii) during the dispensing step, moving the dual printhead and the object-supporting platform relative to one another in a plane defined by first and second directions and in a third direction orthogonal to said plane to form the flowable fluid into a three-dimensional hollow pattern having a molding cavity shaped in accordance with a predetermined threedimensional object; (ix) during the dispensing step, operating the second dispensing nozzle for extruding the crafting medium on a layer by layer basis through the second discharge orifice onto the three-dimensional hollow pattern in order to gradually fill the molding cavity, thereby forming the predetermined threedimensional object; and (x) removing the three-dimensional hollow pattern in order to release the predetermined three-dimensional object.
The present invention further relates to an apparatus for performing the process.
Field of the invention The present invention relates to a three-dimensional imaging process for making objects, preferably metal objects or ceramic objects, on a layer-by-layer basis under the control of a data processing system.
The present invention further relates to a three-dimensional imaging apparatus for achieving the process Background of the invention With the increased use of Computer Aided Design (CAD) solid modeling systems, a new frontier of manufacturing technology has emerged that enables translation of the CAD output data into a three-dimensional (3-D) physical object. This technology is commonly referred to as fused filament fabrication (FFF) or layer manufacturing, which entails building an object on a layer-by-layer and point-by-point basis.
A commercially available FFF system uses a heated nozzle to extrude a melted material such as a plastic wire. The starting material is in the form of a filament being supplied from a spool. The filament is introduced into a flow passage of the nozzle and is driven to move like a piston inside this flow passage. The front end, near the nozzle tip, of this piston is heated to become melted. The rear end or solid portion of this piston pushes the melted portion forward to exit through the nozzle tip. The nozzle is translated under the control of a computer system in accordance with previously generated CAD data sliced into constituent layers.
The FFF technique was first disclosed in U.S. Pat. No. 5,121,329 (1992), entitled "Apparatus and Method for Creating Three-Dimensional Objects," issued to S. S. Crump. The primary application of this FFF technique has been the fabrication of prototypes.
Other 3D-printing methods use a powder clay which is mixed with water and printed out on a layer by layer basis using a syringe to obtain ceramic objects. A drawback of those method is that the printed ceramic object has a very low resolution compared to plastic objects made by using a FFF technique.
The purpose of the present invention is to use a FFF method in order to create a highresolution negative image of the object to be printed and to fill that negative image with ceramic or metallic material to obtain a high-resolution positive object made of ceramic or metal.
Summary of the invention The present invention relates to a process in which the FFF technique is used for making a three-dimensional mold of a predetermined object while filling this mold with a crafting medium such as, for example, a metal clay or a ceramic clay to form the object. The mold is thereafter removed to release the object.
A process in accordance with the present invention includes the steps of: (i) providing a supply of mold building material in filament form; (ii) providing a supply of crafting medium in paste form; (iii) providing a dual printhead including a first dispensing nozzle and a second dispensing nozzle; (iv) feeding the filament to enter one end of a flow passage of the first dispensing nozzle having a first discharge orifice on another end; (v) feeding the crafting medium to enter one end of a flow passage of the second dispensing nozzle having a second discharge orifice on another end; (vi) heating the first dispensing nozzle to convert a leading portion of the filament therein to a flowable fluid; (vii) dispensing the flowable fluid through the first discharge orifice to an objectsupporting platform; (viii) during the dispensing step, moving the dual printhead and the objectsupporting platform relative to one another in a plane defined by first and second directions and in a third direction orthogonal to said plane to form the flowable fluid into a three-dimensional hollow pattern having a molding cavity shaped in accordance with a predetermined three-dimensional object; (ix) during the dispensing step, operating the second dispensing nozzle for extruding the crafting medium on a layer by layer basis through the second discharge orifice onto the three-dimensional hollow pattern in order to gradually fill the molding cavity, thereby forming the predetermined three-dimensional object; and (x) removing the three-dimensional hollow pattern in order to release the predetermined three-dimensional object.
In a preferred embodiment of the invention, the crafting medium consists of small particle of metal mixed with a binder, and the removing step is achieved by heating the hollow pattern in order to melt the mold building material, thereby releasing the predetermined object, which can be sintered to pure metal.
In other embodiments of the present invention, the crafting medium may consist of silicone or ceramic material or other material in paste form, and the removing step can be achieved by other method such as dissolving the mold with a solvent or any other suitable way to remove the mold and release the object The present invention further relates to an apparatus for making a three-dimensional object.
The apparatus includes (i) A first supply of filament material used to build the mold. The supply of filament may comprise a rotatable spool on which the filament is wound. Such a filament material may be comprised of, but is not limited to, one or more of the following materials including various waxes, thermoplastic polymers, thermoset polymers, and combinations thereof. However, the primary modeling material preferably comprises an organic polymer with a reasonably low softening or melting point, e.g., acrylonitrile-butadiene-styrene (ABS) or Polylactic acid (PLA). (ii) A second supply of crafting medium in paste form. Such a medium may consist of silicone, ceramic material or the like. The crafting medium is preferably a commercially available metal clay usually consisting of very small particles of metal such as silver, gold, bronze, or copper mixed with an organic binder and water commonly used in making jewelry, beads and small sculptures. (iii) A filament feeding device comprising a stepper motor, idler rollers located opposite to drive rollers which work together to grip the filament therebetween and to advance it through a filament feeding channel thereby regulating the flow of filament through the feeding channel. (iv) A dual printhead comprising a first dispensing nozzle for depositing the filament material in flowable fluid form and a second dispensing nozzle for depositing the metal clay. The first dispensing nozzle has on one end a flow passage communicating with the feeding channel to receive the filament material therefrom, and heating means in the form of a resistance heating tape or sleeve positioned around a lower portion of the feeding channel for supplying heat energy inside the feeding channel for converting a leading portion of the filament material into a flowable fluid state. The solid, unmelted portion of the filament inside the feeding channel acts like a piston to drive the melted fluid through the first dispensing nozzle. On another end, the first dispensing nozzle has a first discharge orifice through which the melted fluid is dispensed. The second dispensing nozzle has on one end a flow passage communicating with the support of metal clay and on another end a second discharge orifice to dispense the metal clay therethrough. (v) An object-supporting platform disposed at an initially predetermined distance from the first and second discharge orifices to receive the filament fluid and the metal clay, the object platform is located in close, working proximity to the printhead. The upper surface of the platform preferably has a flat region sufficiently large to accommodate the first few layers of the deposited material. (vi) Motion devices for moving the object-supporting platform and the dual printhead relative to one another. The platform and the printhead are equipped with mechanical drive means for moving the platform relative to the printhead in three dimensions along the X-, Y-, and Z-axes in a rectangular coordinate system in a predetermined sequence and pattern, and for displacing the printhead a predetermined incremental distance relative to the platform. This can be accomplished, for instance, by allowing the platform to be driven by three linear motion devices, which are powered by three stepper motors to provide movements along the X-, Y-, and Z-directions, respectively. Motor means are preferably high resolution reversible stepper motors, although other types of drive motors may be used, including linear motors, servomotors, synchronous motors, D.C. motors, and fluid motors. Z-axis movements are effected to displace the platform relative to the printhead or to displace the printhead relative to the platform and, hence, relative to each layer deposited prior to the start of the formation of each successive layer. In one possible arrangement, the printhead and other hardware attached to the nozzle may be mounted in a known fashion for movement in the X-Y plane, with the platform supported for separate movement toward and away from the printhead along the Z-direction. Alternatively, the platform may be supported for movement in the X-Y plane, with the printhead mounted for separate movement along the Z-direction toward and away from the platform. Another alternative is to have the movements in the X-Y plane and in the Z-direction all to be carried out by either the platform only or by the printhead only. (vii) Injecting devices, such as, for example a clay extruder, in communication with the second dispensing nozzle. The injecting devices comprise a reservoir containing the crafting medium and valve means for regulating the flow of crafting medium toward the second dispensing nozzle. The injecting devices may be formed like a syringe with a piston for pressing the crafting medium through the second nozzle and to deposit it through the second discharge orifice in accordance with a predetermined three-dimensional object.
Brief description of the drawing Fig. 1 shows a schematic cross-section view of an apparatus in accordance with the present invention Detailed description of a preferred embodiment As shown in the figure, an apparatus in accordance with a preferred embodiment of the present invention comprises a supply 1 of filament material such as acrylonitrilebutadiene-styrene (ABS) or Polylactic acid (PLA); a filament feeding device comprising a stepper motor (not shown), idler rollers 4 located opposite to drive rollers 5 which work together to grip the filament therebetween and to advance it through a filament feeding channel 6 thereby regulating the flow of filament through the feeding channel 6. The feeding channel 6 is made of a material having low thermal conductivity, such as for example teflon. The apparatus further includes a first dispensing nozzle 7 preferably made of a material with a thermal conductivity greater than 25 W/(m K), such as for example brass or simmilar metallic alloys. The first dispensing nozzle 7 can be heated to a temperature sufficiently high for the filament 2 to liquify. Heating elements 8, in the form of a resistance heating tape or sleeve, and a temperature sensor (not shown) are arranged around a lower portion of the nozzle 7 to regulate the temperature of the nozzle 7 to a temperature of approximatively 200°C to 240°C in order to convert a leading portion of the filament 2 into a flowable fluid state. The solid (un-melted) portion of the filament 2 inside the feeding channel 6 acts like a piston to drive the melted liquid for dispensing through a first discharge orifice 9. The drive motor (not shown) can be controlled to regulate the advancing rate of the filament 2 in the feeding channel 6 so that the volumetric dispensing rate of the fluid can be closely controlled.
As shown in the Figure, the apparatus further includes a supply 10 of crafting medium 11, such as for example a metal clay or a ceramic clay. In a preferred embodiment of the invention, the crafting medium 11 consists of microscopic metal particles of metal, such as silver, gold, copper or alloys or combinations thereof, mixed with an organic binder and water. The supply 10 is preferably shaped as a conventional clay extruder comprising a cylindrical cavity and valve means 12 to control and regulate the flow of crafting medium toward a second dispensing nozzle 13 and through a second discharge orifice 14.
Both nozzles 7, 13 are arranged at a predetermined distance from an objectsupporting platform 15. The dual printhead and the platform 15 are moved relative to one another in a movement pattern corresponding to a predetermined object 17. The fused filament is deposited through the first discharge orifice 9 while the dual printhead is moving in a X-Y-plane relative to the platform 15, in order to build one layer of a mold 16. Thereafter, the crafting medium is deposited while the dual printhead is moving in a X-Y-plane relative to the platform 15 in order to fill the layer of the mold 16. Thereafter the dual printhead and the platform 15 are displaced in Z-direction from one another by a distance corresponding to the thickness of a single layer so that the next layer can be deposited. The first and second dispensing nozzles 7, 13 are used to deposit the fused filament and the crafting medium respectively and alternate the deposition on a layer by layer basis, in such a manner that the mold is alternately builded and then filled with crafting medium for each single layer. When the deposition is achieved, the object 17 is embedded inside the mold 16. The mold 16 will thereafter be removed in order to release the object 17. That removal step is preferably achieved by heating the mold 16 to a temperature of approximately 200°C until the mold building material is melted away from the object 17. If the object 17 is made of a metal clay, the metal contained in the object 17 is thereafter sintered to obtain a pure metal object.

Claims (7)

Claims
1.) A process for making a three-dimensional object comprising the steps of: providing a supply of mold building material in filament form; providing a supply of crafting medium in paste form; providing a dual printhead including a first dispensing nozzle and a second dispensing nozzle; feeding said filament material to enter one end of a flow passage of said first dispensing nozzle having a first discharge orifice on another end; feeding said crafting medium to enter one end of a flow passage of said second dispensing nozzle having a second discharge orifice on another end; heating said first dispensing nozzle to convert a leading portion of said filament material therein to a flowable fluid; dispensing said flowable fluid through said first discharge orifice to an objectsupporting platform; during said dispensing step, moving said dual printhead and said object-supporting platform relative to one another in a plane defined by first and second directions and in a third direction orthogonal to said plane to form said flowable fluid into a threedimensional hollow pattern having at least one molding cavity shaped in accordance with a predetermined three-dimensional object; during said dispensing step, operating said second dispensing nozzle for extruding said crafting medium on a layer by layer basis through said second discharge orifice onto said three-dimensional hollow pattern in order to gradually fill said at least one molding cavity, thereby forming said predetermined three-dimensional object; and removing said three-dimensional hollow pattern in order to release said predetermined three-dimensional object.
2. ) A process according to claim 1 characterized in that said crafting medium consists of small particles of metal mixed with at least one binder.
3. ) A process according to claim 2 characterized in that the removing step is achieved by heating said three-dimensional hollow pattern in order to melt away said mold building material, thereby releasing said predetermined three-dimensional object, which can be further heated to obtain pure sintered metal.
4. ) A process according to claim 1 characterized in that said crafting medium contains silicone.
5. ) A process according to claim 1 characterized in that said crafting medium contains ceramic material.
6. ) A process according to claim 1 characterized in that the removing step is achieved by dissolving said hollow pattern by adding a solvent to said mold building material.
7. ) Apparatus for making a three-dimensional object on a layer-by-layer basis, comprising: a first supply of mold building material in filament form; a second supply of crafting medium in paste form a filament feeding device comprising a filament feeding channel at a predetermined distance from said first supply for receiving said mold building filament material therefrom and drive means to drive and regulate the flow of said mold building filament material in said feeding channel; a dual printhead including a first dispensing nozzle having on one end a flow passage communicating with said feeding channel to receive said mold building filament material therefrom, heating means at a predetermined position for supplying heat energy to said flow passage for converting a leading portion of said mold building filament material therein to a flowable fluid state, and on another end a first discharge orifice to dispense said fluid therethrough; and a second dispensing nozzle having on one end a flow passage communicating with said second supply of crafting medium, and on another end a second discharge orifice to dispense said crafting medium therethrough; an object-supporting platform disposed at an initially predetermined distance from said first and second discharge orifices to receive said mold building filament material in flowable fluid form and said crafting medium therefrom; motion devices coupled to said object-supporting platform and said dual printhead for moving said printhead and said platform relative to one another in a plane defined by first and second directions and in a third direction orthogonal to said plane to deposit said flowable fluid of mold building material into a three-dimensional hollow pattern having at least one molding cavity shaped in accordance with a predetermined three-dimensional object; injecting devices in communication with said second dispensing nozzle for extruding said crafting medium through said second discharge orifice onto said threedimensional hollow pattern on a layer by layer basis in such a manner that said at least one molding cavity is gradually filled by said crafting medium, thereby building said predetermined three-dimensional object within said hollow pattern, said mold building material forming the hollow pattern being subsequently removed in order to release said predetermined three-dimensional object.
SE1500245A 2015-05-25 2015-05-25 A process and apparatus for making a three-dimensional object SE540201C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE1500245A SE540201C2 (en) 2015-05-25 2015-05-25 A process and apparatus for making a three-dimensional object

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Application Number Priority Date Filing Date Title
SE1500245A SE540201C2 (en) 2015-05-25 2015-05-25 A process and apparatus for making a three-dimensional object

Publications (2)

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SE1500245A1 SE1500245A1 (en) 2016-11-26
SE540201C2 true SE540201C2 (en) 2018-04-24

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