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Numéro de publicationWO2008076038 A1
Type de publicationDemande
Numéro de demandePCT/SE2007/001110
Date de publication26 juin 2008
Date de dépôt17 déc. 2007
Date de priorité18 déc. 2006
Numéro de publicationPCT/2007/1110, PCT/SE/2007/001110, PCT/SE/2007/01110, PCT/SE/7/001110, PCT/SE/7/01110, PCT/SE2007/001110, PCT/SE2007/01110, PCT/SE2007001110, PCT/SE200701110, PCT/SE7/001110, PCT/SE7/01110, PCT/SE7001110, PCT/SE701110, WO 2008/076038 A1, WO 2008076038 A1, WO 2008076038A1, WO-A1-2008076038, WO2008/076038A1, WO2008076038 A1, WO2008076038A1
InventeursGunnar SÖDER
DéposantSoeder Gunnar
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes:  Patentscope, Espacenet
A device and method for producing a three-dimensional object with a 3-d printer where the feeding mechanism feeds the object in reverse of the building direction
WO 2008076038 A1
Résumé
The invention relates to a 3-d printer and a method for production of three dimensional objects, The 3-d printer deposits and fuses layers of continuous sheets of substance of a selected shape on top of each other such that a continuous body is built. The 3-d printer further has a feeding device arranged to grasp part of the continuous body and feed this downwards during production, such that new layers may be added from above without the upper end of the body moving upwards, but instead as the body grows it is fed out downwards such that objects with unlimited heights or lengths may be produced. The 3-d printer may during production of a desired object further produce a holder part that is arranged to be received in the feeding device.
Revendications  (Le texte OCR peut contenir des erreurs.)
Claims
1 A 3-d printer comprising a device that deposits and fuses layers of continuous sheets of substance of a selected shape on top of each other such that a continuous body (2a, 2b) is built in a building direction, characterised in that said 3-d printer further comprises a feeding device (3) arranged to grasp part of the continuous body (2a, 2b) and feed this in a direction opposite to the building direction.
2 A 3-d printer according to claim 1, characterised in that said feeding device (3) is arranged to feed the continuous body (2a, 2b) essentially one sheet thickness before a new sheet of substance is fused with those previously fused.
3 A 3-d printer according to claim 1 or 2, characterised in that said 3-d printer is arranged to at least deposit and fuse layers of continuous sheets of substance of a selected shape such that a holder part (2b) is formed, where said holder part is arranged to be received in the feeding device (3).
4 A 3-d printer according to any one of the preceding claims, characterised in that said 3-d printer deposits layers of powder that are fused into continuous sheets.
5 A method for production of a three dimensional object comprising a first step where a layer in the form of a sheet of selected shape is added in a building direction and fused with a layer situated under it, characterised in that in a second step the sheets fused so far are fed essentially one sheet thickness in a direction opposite to the building direction.
6 A method for production of a three dimensional object according to claim 4, characterised in that before the first and second steps in the process, in a first preceding step a number of layers in the form of sheets of selected shapes are deposited on each other in a building direction from a bottom plate, and each sheet is fused with one laying below it, such that a body (2a, 2b) is formed, and in a second preceding step a feeding device (3) grasp the body, and in a third preceding step the bottom plate is removed.
7 A method for production of a three dimensional object according to claim 4, characterised in that before the first and second steps in the process, in a preceding step a body (2a, 2b) is placed in a feeding device (3).
Description  (Le texte OCR peut contenir des erreurs.)

A DEVICE AND METHOD FOR PRODUCING A THREE-DIMENSIONAL OBJECT WITH A 3-D PRINTER WHERE THE FEEDING MECHANISM FEEDS THE OBJECT IN REVERSE OF THE BUILDING DIRECTION

The present invention relates to a 3-d printer and a method for producing three dimensional objects according to the introductory portions of the independent claims.

Background of the invention

3-d printers are today well known and are available in many versions. Typically, initially a thin layer of plastic or metal powder is deposited in the bottom of a through. A laser fuses the plastic or metal powder over selected portions of the layer. In a next step a further thin layer is deposited on top of the previous, partially sintered layer and the laser fuses selected portions of the second layer, while in the same process fusing the new layer with the layer below. By repeating the process sintered substance of a chosen form grows upwards in the powder and when the process is finished one only has to remove residual unfused powder.

The maximum size of a 3-d object that may be produced by such a process is defined by the size of the trough. This obviously sets the maximum height of the 3-d object that may be produced by such a process, which means unpractically high troughs must be used if high objects are to be made.

An object of the invention is therefore to provide a 3-d printer that allows production of higher objects than what is possible with prior art 3-d printers.

These and other objects are attained by a 3-d printer according to the characterising portions of the independent claims.

Summary of the invention

The invention relates to a 3-d printer that deposits and fuses layers of continuous sheets of substance of a selected shape on top of each other such that a continuous body is built. The 3-d printer has, as opposed to prior art 3-d printers, a feeding device arranged to grasp part of the continuous body (2a, 2b) and feed this downwards during production, such that new layers may be added from above without the upper end of the body moving upwards, but instead as the body grows it is fed out downwards. This has the important advantage over prior art 3-d printers that objects with unlimited height or lengths may be produced

An advantageous way of producing bodies with the 3-d printer is to during production of a desired object further let it produce a holder part that is arranged to be received in the feeding device.

At start-up of the process the 3-d printer may start in ordinary fashion by producing a body in a trough that the feeding device may grasp or the process may start from a starting body being available in advance.

The invention further relates to a method for production of three dimensional objects that utilizes such a feeding device.

Brief description of the drawings

Fig. 1 shows an embodiment of the invention

Description of a preferred embodiment

With a 3-d printer according to the invention, the process is started by a thin layer of powder deposited on a bottom plate and portions of the layer being sintered. A new layer is deposited on top of the old one, portions of this are sintered and in that process it is fused with the old layer. The process is repeated on the bottom plate until a selected height is achieved.

In the process, the desired portion of the object is sintered and concurrently a holder part is suitably sintered that throughout the sintering process is attached to the desired object. The holder part is further arranged such that a feeding device (3) may grip onto the holder part a feed the desired object downwards.

In fig. 1 the 3-d printing process has reached this state where the holder part (2b) is fully formed and is received in the feeding device (3). The desired object (2a) is can now be found within the holder part (2b) and the bottom plate that was used at the start of the process has been removed. When a further layer is to be added, the holder part with the desired object is shifted one layer thickness downwards, and the process is repeated. With a 3-d printer according to the invention the height of the objects that may be produced is in principle unlimited. In the selected embodiment, the holder part runs through an opening in a flat table (1), such that after lowering of the holder part, an evenly thick layer of powder may be deposited over a surface that covers the whole cylinder with holder part and the desired object. In this way any selected shape may be achieved within the limits set by the size of the cylinder.

Obviously, the feeding device may directly grasp the desired object and in such case no holder part is needed, but this puts higher demands on the design of the feeding device and the table (1). The process does not always have to start with a part suitable for reception into a feeding device being produced on a bottom plate which is then removed, alternatively such a part may be available presintered or cast and the process may then start directly from the step illustrated in fig. 1. Even if it generally is less practical, the printer may obviously add layers sidewise and eject the body to the side or in any direction. By 3-d printer is in this document not only meant a device for production of three dimensional objects from powder by sintering, but obviously the production method according to the invention may be applied on other methods for preparation of three dimensional objects from powders, gels, etc.

Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
DE19813742C1 *27 mars 199815 juil. 1999Eos Electro Optical SystThree-dimensional object manufacture and process equipment for faster, higher quality object manufacture
EP1666234A1 *10 août 20047 juin 2006Fuji Photo Film Co. Ltd.Process for producing three-dimensional shaped article
US20020026982 *10 avr. 20017 mars 2002Bredt James F.Three dimensional printing material system and method
US20020105114 *5 févr. 20028 août 2002Minolta Co., Ltd.Three-dimensional molding apparatus and three-dimensional molding method
Référencé par
Brevet citant Date de dépôt Date de publication Déposant Titre
CN103754477A *15 janv. 201430 avr. 2014李金秀Conveying box of 3D (three-dimensional) printer
CN103754477B *15 janv. 201421 oct. 2015李金秀一种3d打印机送料盒
Classifications
Classification internationaleB22F3/105, B22F7/00, B29C67/04
Classification coopérativeB22F3/1055, B29C64/141, Y02P10/295, B22F2003/1056
Classification européenneB22F3/105S, B29C67/00R4
Événements juridiques
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