Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO2020115488 - CONFIGURATIONS DE CHARIOT ET PROCÉDÉS D'EXPLOITATION POUR LA FABRICATION D'OBJETS TRIDIMENSIONNELS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. Apparatus for manufacturing a three-dimensional object from a powder, the apparatus comprising:

a build bed having a build area, wherein successive layers of said three-dimensional object are formed in the build bed;

a powder distribution sled operable to distribute a layer of powder within the build area, the powder distribution sled being driveable in a first direction along a first axis, across the build area, and driveable in a second direction, opposite to the first direction, along the first axis; and

a print sled operable to deposit a pattern of fluid onto the layer of powder within the build area to define the cross section of said object in said layer, the print sled being driveable in the first direction along a second axis across the build area, and driveable in the second direction along the second axis;

wherein the first axis is parallel to, or coaxial with, the second axis;

wherein the print sled comprises one or more droplet deposition heads for depositing the fluid, a first radiation source assembly, and a second radiation source assembly;

wherein the powder distribution sled comprises a powder distribution device for distributing the powder, a third radiation source assembly and a fourth radiation source assembly; and

wherein each of the first, second, third and fourth radiation source assemblies is operable to both preheat and sinter powder within the build area.

2. Apparatus according to claim 1, wherein the first radiation source assembly is located on one side of the one or more droplet deposition heads, in the second direction relative to the one or more droplet deposition heads, and the second radiation source assembly is located on the other side of the one or more droplet deposition heads, in the first direction relative to the one or more droplet deposition heads.

3. Apparatus according to claim 1 or claim 2, wherein the third radiation source assembly is located on one side of the powder distribution device, in the second direction relative to the powder distribution device, and the fourth radiation source assembly is located on the other side of the powder distribution device, in the first direction relative to the powder distribution device.

4. Apparatus according to any preceding claim, wherein the powder distribution sled and the print sled are mounted on common rails.

5. Apparatus according to any of claims 1 to 3, wherein the powder distribution sled and the print sled are mounted on separate rails.

6. Apparatus according to claim 5, wherein the powder distribution sled and the print sled are mounted on separate rails laterally and/or vertically offset from one another.

7. Apparatus according to any preceding claim, wherein the powder distribution sled and the print sled are independently movable.

8. Apparatus according to any preceding claim, further comprising a third sled driveable in the first direction along a third axis across the build area, and driveable in the second direction, along the third axis.

9. Apparatus according to claim 8, wherein the third sled comprises a further radiation source assembly.

10. Apparatus according to claim 8 or claim 9, wherein the third sled further comprises one or more droplet deposition heads for depositing a fluid.

11. Apparatus according to claim 8 or claim 9, wherein the third sled further comprises a powder levelling device.

12. A method of manufacturing a three-dimensional object from a powder using apparatus according to claim 1 to form each layer of said object.

13. The method according to claim 12, wherein the third radiation source assembly is located on one side of the powder distribution device, in the second direction relative to the powder distribution device, and the fourth radiation source assembly is located on the other side of the powder distribution device, in the first direction relative to the powder distribution device.

14. The method according to claim 13 wherein, to form each layer of said object, the method comprises the steps of:

(a) driving the powder distribution sled in the first direction across at least part of the build area and

(al) distributing a layer of powder within the build area;

(b) driving the powder distribution sled in the second direction;

(c) driving the print sled in the second direction across at least part of the build area;

(d) driving the print sled in the first direction; and

(e) driving the powder distribution sled in the first direction; and

repeating from step (al) to distribute the next layer of powder within the build area; wherein the method further comprises preheating the layer of powder by any or all of: (fl) activating the third radiation source assembly during step (a);

(f2) activating the third radiation source assembly during step (b);

(b) activating the fourth radiation source assembly during step (b);

(f4) activating the first radiation source assembly during step (c);

(f5) activating the second radiation source assembly during step (c);

(f6) activating the second radiation source assembly during step (d);

(f7) activating the third radiation source assembly during step (e);

wherein the method further comprises, during step (c) and/or step (d), depositing a pattern of fluid onto the layer of powder within the build area using the one or more droplet deposition heads; and

wherein the method further comprises sintering the powder on which fluid was deposited, by any or all of:

(gl) activating the second radiation source assembly during step (c) to sinter the powder underlying the fluid deposited during step (c);

(g2) activating the second radiation source assembly during step (d) to sinter the powder underlying the fluid deposited during step (c);

(g3) activating the first radiation source assembly during step (d) to sinter the powder underlying the fluid deposited during step (c) and/or step (d);

(g4) activating the fourth radiation source assembly during step (e) to sinter the powder underlying the fluid deposited during step (c) and/or step (d).

15. The method according to claim 14 wherein, to form each layer of said object, the method comprises the preheating steps (fl), (£2), (f3) and (f4); and the sintering steps (gl), (g2) and (g3).

16. The method according to claim 15, further comprising the sintering step (g4).

17. The method according to claim 14 wherein, to form each layer of said object, the method comprises the preheating steps (fl), (f2), (b), (f4), (f5) and (f6); and the sintering step (g3) to sinter the powder underlying the fluid deposited during step (d).

18. The method according to claim 17, further comprising the sintering step (g4) to sinter the powder underlying the fluid deposited during step (d).

19. The method according to claim 13 wherein, to form each layer of said object, the method comprises the steps of:

(a) driving the powder distribution sled in the first direction across at least part of the build area and

(al) distributing a layer of powder within the build area;

(b) driving the print sled in the first direction across at least part of the build area;

(c) driving the print sled in the second direction;

(d) driving the powder distribution sled in the second direction;

(e) driving the powder distribution sled in the first direction; and

repeating from step (al) to distribute the next layer of powder within the build area; wherein the method further comprises preheating the layer of powder by any or all of: (fl) activating the third radiation source assembly during step (a);

(f2) activating the second radiation source assembly during step (b);

(f3) activating the first radiation source assembly during step (b);

(f4) activating the first radiation source assembly during step (c);

(f5) activating the third radiation source assembly during step (e);

wherein the method further comprises, during step (b) and/or step (c), depositing a pattern of fluid onto the layer of powder within the build area using the one or more droplet deposition heads; and

wherein the method further comprises sintering the powder on which fluid was deposited, by any or all of:

(gl) activating the first radiation source assembly during step (b) to sinter the powder underlying the fluid deposited during step (b);

(g2) activating the first radiation source assembly during step (c) to sinter the powder underlying the fluid deposited during step (b);

(g3) activating the second radiation source assembly during step (c) to sinter the powder underlying the fluid deposited during step (b) and/or step (c);

(g4) activating the third radiation source assembly during step (d) to sinter the powder underlying the fluid deposited during step (b) and/or step (c);

(g5) activating the fourth radiation source assembly during step (d) to sinter the powder underlying the fluid deposited during step (b) and/or step (c);

(g6) activating the fourth radiation source assembly during step (e) to sinter the powder underlying the fluid deposited during step (b) and/or step (c).

20. The method according to claim 19 wherein, to form each layer of said object, the method comprises the preheating steps (fl) and (f2); and the sintering steps (gl), (g2), (g3), (g4) and (g5).

21. The method according to claim 20, further comprising the sintering step (g6).

22. The method according to claim 19 wherein, to form each layer of said object, the method comprises the preheating steps (fl), (£2), (f3) and (f4); and the sintering steps (g3) to sinter the powder underlying the fluid deposited during step (c), (g4) to sinter the powder underlying the fluid deposited during step (c), and (g5) to sinter the fluid deposited during step (c).

23. The method according to claim 22, further comprising the sintering step (g6) to sinter the powder underlying the fluid deposited during step (c).

24. The method according to claim 14 or claim 19 wherein, to form each layer of said object, the method includes at least four preheating steps.

25. The method according to claim 14 or claim 19 wherein, to form each layer of said object, the method includes at least four sintering steps.

26. The method according to any of claims 14 to 25, wherein the method comprises sintering the fluid-deposited parts of the layer during the distribution of the next layer.

27. The method according to any of claims 14 to 25, wherein the method comprises depositing the pattern of fluid immediately after preheating the layer of powder.