WO2024073789A1 - Extrusionskopf für die additive fertigung eines formkörpers - Google Patents
Extrusionskopf für die additive fertigung eines formkörpers Download PDFInfo
- Publication number
- WO2024073789A1 WO2024073789A1 PCT/AT2023/060347 AT2023060347W WO2024073789A1 WO 2024073789 A1 WO2024073789 A1 WO 2024073789A1 AT 2023060347 W AT2023060347 W AT 2023060347W WO 2024073789 A1 WO2024073789 A1 WO 2024073789A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tubular body
- carrier
- extrusion
- induction coil
- guide flange
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
- H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
-
- 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
-
- 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/295—Heating elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
- H05B6/107—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for continuous movement of material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/14—Tools, e.g. nozzles, rollers, calenders
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
- H05B6/44—Coil arrangements having more than one coil or coil segment
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0811—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using induction
Definitions
- the invention relates to an extrusion head for the additive manufacturing of a molded body with a tubular body made of a ferromagnetic material which opens into an extrusion nozzle and is held in a carrier on the feed side, forming an extrusion channel, and with at least one induction coil enclosing the tubular body between the carrier and the extrusion nozzle.
- the inductively heated tubular body can thus give off its heat to the thermoplastic material, which can be advantageously melted during its conveyance through the extrusion channel in a manner determined with regard to the temperature profile in order to be discharged as a melt strand from the extrusion nozzle closing the extrusion channel.
- the ferromagnetic tubular bodies can have radially protruding spacer rings on both end faces (WO 2016/102 669 A1).
- the magnetic field induced in the tubular body forms a stray field in the area of the support that holds the tubular body, which impairs the heating performance of the induction coil. If the support forms a conventional aluminum or copper-based heat sink through which the thermoplastic material strand is fed to the tubular body, the additional problem arises that the magnetic stray field emerging from the inlet-side end of the tubular body held by the heat sink induces eddy currents in the heat sink, which undesirably heat the heat sink.
- the invention is therefore based on the object of equipping an extrusion head for the additive manufacturing of a molded body with an inductive heating device in such a way that undesirable effects of magnetic stray fields in the feed-side area of the tubular body can be largely avoided.
- the invention solves the problem in that the tubular body has a guide flange for the induced magnetic field, which is arranged in the axial direction between the induction coil and the carrier and projects radially outwards.
- the radially outwardly projecting guide flange results in a branching of the magnetic circuit with the effect that a significant part of the magnetic field lines bundled in the guide flange are diverted from the ferromagnetic tubular body, so that the residual magnetic field in the connection area of the tubular body to the carrier causes a comparatively small stray field, so that the inductive heating of the tubular body is improved.
- this also means that the eddy currents induced in the metallic heat sink by the stray magnetic field can be reduced to a level that is insignificant for the temperature profile in the heat sink.
- the section of the pipe body protruding axially over the guide flange towards the support can have a smaller wall thickness than the section of the pipe body enclosed by the induction coil.
- the associated bundling of the field lines can also be used to guide the magnetic circuit in the area of the extrusion nozzle in order to specify special induction conditions and thus ensure a predetermined temperature profile for the melt strand.
- Fig. 1 shows an extrusion head according to the invention in a schematic longitudinal section in the area of the induction heating
- Fig. 2 is a representation corresponding to Fig. 1 of an embodiment variant of an extrusion head according to the invention.
- thermoplastic material strand which is applied in layers as a melt for the additive manufacture of a molded body, is fed through a conveyor channel 1 of a carrier 2 to an extrusion channel 3 which continues the conveyor channel 1 and opens into an extrusion nozzle 4 in order to be melted along the extrusion channel 3 and discharged from the extrusion nozzle 4 as a melt strand.
- an inductive heating device which comprises a tubular body 5 made of a ferromagnetic material forming the extrusion channel 3 and at least one induction coil 6 surrounding the tubular body 5 at a radial distance.
- the carrier 2 receiving the tubular body 5 preferably forms a cooling body based on aluminum or copper, into which the tubular body 5 is screwed, for example.
- the tubular body 5 has a radially outwardly projecting guide flange 7 for the induced magnetic field in the axial direction between the induction coil 6 and the carrier 2, which guide flange diverts a considerable part of the magnetic field from the tubular body 5, so that the residual field in the area of the section 8 of the tubular body 5 between the guide flange 7 and the carrier 2 causes only a comparatively small stray field, which means that on the one hand the effect of the inductive heating can be improved and on the other hand the eddy currents that are induced in the carrier 2 designed as a metallic heat sink are negligible.
- the section 8 of the tubular body 5 protruding from the guide flange 7 towards the carrier 2 can have a smaller wall thickness than the remaining thickness of the wall of the tubular body 5.
- the guide flange 7 of the tubular body 5 can advantageously serve as a holder for the preferably ceramic coil carrier 9 in order to achieve a to secure an annular gap 10 between the tubular body 5 and the coil carrier 9 which hinders heat transfer.
- care must be taken to ensure that the position of the guide flange 7 relative to the induction coil 6 is selected in such a way that the magnetic partial circle caused by the guide flange 7 is formed in a way which is advantageous for the field line course.
- the tubular body 5 according to Fig. 2 has, in addition to the guide flange 7 which acts as a magnetic shield for the carrier 2, a further guide flange 11 in the axial direction between the induction coil 6 and the extrusion nozzle 4, which also influences the course of the magnetic field lines and can therefore help to adjust the magnetic circuit, in particular with regard to the requirements for the temperature profile of the melt strand in the area of the extrusion nozzle 4.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23789490.2A EP4598730A1 (de) | 2022-10-06 | 2023-10-05 | Extrusionskopf für die additive fertigung eines formkörpers |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA50778/2022A AT526563B1 (de) | 2022-10-06 | 2022-10-06 | Extrusionskopf für die additive Fertigung eines Formkörpers |
| ATA50778/2022 | 2022-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024073789A1 true WO2024073789A1 (de) | 2024-04-11 |
Family
ID=88412221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AT2023/060347 Ceased WO2024073789A1 (de) | 2022-10-06 | 2023-10-05 | Extrusionskopf für die additive fertigung eines formkörpers |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4598730A1 (de) |
| AT (1) | AT526563B1 (de) |
| WO (1) | WO2024073789A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016102669A1 (en) | 2014-12-23 | 2016-06-30 | Bond B.V. | Deposition print head |
| EP3148293A1 (de) | 2015-09-28 | 2017-03-29 | Ultimaker B.V. | Induktive düsenheizungsanlage |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2017016B1 (en) * | 2016-06-21 | 2018-01-04 | Ultimaker Bv | Nozzle for a three dimensional printing apparatus |
| US20200061896A1 (en) * | 2018-08-26 | 2020-02-27 | Khan Khac Tran | Induction Heated Extrusion Melter |
-
2022
- 2022-10-06 AT ATA50778/2022A patent/AT526563B1/de active
-
2023
- 2023-10-05 WO PCT/AT2023/060347 patent/WO2024073789A1/de not_active Ceased
- 2023-10-05 EP EP23789490.2A patent/EP4598730A1/de active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016102669A1 (en) | 2014-12-23 | 2016-06-30 | Bond B.V. | Deposition print head |
| EP3148293A1 (de) | 2015-09-28 | 2017-03-29 | Ultimaker B.V. | Induktive düsenheizungsanlage |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4598730A1 (de) | 2025-08-13 |
| AT526563A1 (de) | 2024-04-15 |
| AT526563B1 (de) | 2025-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE19915682C2 (de) | Spritzgußdüse | |
| EP1400002B1 (de) | Elektromotor mit kühlschlange | |
| DE3939017C2 (de) | Induktiv beheizbare Vorrichtung | |
| DE2200489C3 (de) | Induktorvorrichtung für die Hochfrequenz-Induktionserhitzung von Werkstücken | |
| DE3642271A1 (de) | Heizeinrichtung mit einer heizspitze | |
| EP3593922B1 (de) | Gussformanordnung mit einer messsektion zur detektion des fliessverhaltens von metall beim giessen und ein verfahren zur messung eines fliessverhaltens einer schmelze in einer gussformanordnung | |
| AT526563B1 (de) | Extrusionskopf für die additive Fertigung eines Formkörpers | |
| EP0137888A2 (de) | Spritzgiessvorrichtung | |
| DE4429340C2 (de) | Tiegel zum induktiven Schmelzen oder Überhitzen von Metallen, Legierungen oder anderen elektrisch leitfähigen Werkstoffen | |
| DE102014017857B3 (de) | Anordnung elektrischer Leiter und Verfahren zur Herstellung einer Anordnung elektrischer Leiter | |
| DE19515230C2 (de) | Verfahren zum induktiven Aufheizen eines feuerfesten Formteils sowie ein entsprechendes Formteil | |
| DE102012004439B3 (de) | Verfahren und Vorrichtung zur induktiven Erwärmung von Werkstücken | |
| DE1916317C3 (de) | Stromzuführung für eine Induktionsspule beim tiegelfreien Zonenschmelzen | |
| DE19843087A1 (de) | Induktor zur Erzeugung eines elektromagnetischen Wechselfeldes | |
| EP0106958A1 (de) | Elektrodynamische Pumpe | |
| DE10344681B4 (de) | Anlage zur Herstellung von Kabeln mit speziell ausgebildetem Teleskoprohr | |
| WO2025076565A1 (de) | Extrusionskopf für die additive fertigung eines formkörpers | |
| WO2024216315A1 (de) | Extrusionskopf für die additive fertigung eines formkörpers | |
| EP0490264A1 (de) | Rinneninduktor mit äusserem metallenen Gehäuse | |
| DE2226256A1 (de) | Fluessigkeitsgekuehlte induktorspule fuer netzfrequenz | |
| AT313982B (de) | Vorrichtung zum induktiven tiegelfreien zonenschmelzen | |
| DE202023101010U1 (de) | Fertigungsanlage zur Wärmebehandlung von warm- und kaltgeformten Federelementen | |
| DE29700645U1 (de) | Elektromagnetische Induktionsspule | |
| DE4002581A1 (de) | Induktor | |
| DE102013012972A1 (de) | Werkzeug zur induktiven Erwärmung eines Bauteils |
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: 23789490 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2023789490 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2023789490 Country of ref document: EP Effective date: 20250506 |
|
| WWP | Wipo information: published in national office |
Ref document number: 2023789490 Country of ref document: EP |