Three dimensional modeling

• US 5,287,435 A
• Filed: 08/23/1990
• Issued: 02/15/1994
• Est. Priority Date: 06/02/1987
• Status: Expired due to Term

• Current Assignee: Objet Geometries
• Original Assignee: Cubital Ltd.
• Inventors: Shlick, Mark, Herskowits, Varda, Wasserstein, Michael, Dollberg, Yehoshua, Pomerantz, Itzik, Barnea, Daniel, Yeshurun, Nachshon, Gilad, Shalev, Meininger, Herbert, Cohen, Nissan, Sheinman, Yehoshua, Ben-Ezra, Barry, Sas, Benjamin, Barequet, Gill
• Primary Examiner(s): Nguyen, Phu K.
• Application Number:
  US07/572,214
• Time in Patent Office: 1,272 Days
• Field of Search: 364/518, 364/521, 364/468, 364/472, 340/747, 340/750, 395/133, 395/118, 264/22, 264/183, 425/162
• US Class Current: 345/418
• CPC Class Codes: B29C 64/129 characterised by the energy source therefor, e.g. by global irradiation combined with a mask
• CPC Class Codes: B29C 64/188 involving additional operations performed on the added layers, e.g. smoothing, grinding or thickness control surface shaping B29C59/00; after-treatment of articles without altering their shape B29C71/00
• CPC Class Codes: B29C 64/40 Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B33Y 30/00 Apparatus for additive manufacturing; Details thereof or accessories therefor
• CPC Class Codes: B33Y 50/02 for controlling or regulating additive manufacturing processes
• CPC Class Codes: G05B 2219/49015 Wire, strang laying, deposit fluid, welding, adhesive, hardening, solidification, fuse

Abstract

Apparatus for producing a three-dimensional model including apparatus for depositing, layer upon layer, a photopolymer material in a selectable configuration and apparatus for curing each photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer.

Claims

1. Apparatus for producing a three-dimensional model comprising:

means for selective dispensing of a photopolymer materials, layer upon layer, in a pattern matter configuration; and

means for radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer.

2. Apparatus according to claim 1 and also comprising means for applying a support material at certain locations of each layer which are not filled by photopolymer prior to deposition onto said layer of a succeeding layer of photopolymer.

3. Apparatus according to claim 2 and also comprising machining means for leveling each layer prior to deposition thereon of a succeeding layer of photopolymer.

4. A method for producing a three-dimensional model comprising the steps of:

selective dispensing of a photopolymer material, layer upon layer, in a pattern configuration; and

radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer.

5. A method according to claim 4 and also comprising the step of:

applying a support material at certain locations of each layer which are not filled by photopolymer prior to deposition onto said layer of a succeeding layer of photopolymer.

6. A method according to claim 5 and also comprising the step of:

mechanically leveling each layer prior to deposition thereon of a succeeding layer of photopolymer.

7. Apparatus for producing a three-dimensional model comprising:

means for selective dispensing of a photopolymer material layer upon layer, in a pattern configuration; and

means for radiation curing each photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer, and wherein said means for curing includes means for initially curing said layer at interior locations thereof and subsequently curing said layer at peripheral locations thereof.

8. Apparatus according to claim 7 and wherein said means for initially curing comprises:

means for applying a coarse, high power beam of ultraviolet illumination at regions away from edges thereof; and

means for subsequently applying a well focussed, low power beam of laser radiation to regions of the layer adjacent the edges.

9. A method for producing a three-dimensional model comprising the steps of:

selective dispensing of a photopolymer material, layer upon layer in a pattern configuration; and

radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer, and wherein said step of radiation curing includes the steps of initially curing said layer at interior locations thereof and subsequently curing said layer at exterior locations thereof.

10. A method according to claim 9 and wherein said step of initially curing comprises the steps of:

applying a coarse, high power beam of ultraviolet illumination at regions away from edges of the layer; and

subsequently applying a well focussed, low power beam of laser radiation to regions of the layer adjacent the edges.

11. Apparatus for producing a three-dimensional model comprising:

means for selective dispensing of a photopolymer material, layer upon layer; and

means for curing each said photopolymer layer following deposition thereof by exposing each layer of the photopolymer material through a mask defining a layered section of an object to be modeled, superimposed upon a grid pattern, and wherein the means for curing includes;

computer means for generating a layer by layer raster pattern parallel to a first axis of each layer, and

hardware plotter driver means receiving and decoding said raster pattern to define first grid lines along said first axis and adding thereto second grid lines along a second axis, thereby to define said grid pattern.

12. Apparatus for producing a grid pattern comprising;

computer means for selective dispensing of a photopolymer material, layer by layer in a raster pattern parallel to a first axis; and

hardware plotter driver means receiving and decoding said raster pattern to define first grid lines along said first axis and adding thereto second grid lines along a second axis, thereby to define said grid pattern.

13. A method for producing a three-dimensional model comprising;

selective dispensing of a photopolymer material, layer upon layer; and

curing each said photopolymer layer following deposition thereof by exposing each layer of the photopolymer material through a mask defining a layered section of an object to be modeled superimposed upon a grid comprising first grid lines, and wherein the step of curing includes the steps of;

computer generating a layer by layer raster pattern parallel to a first axis of each layer, and

receiving the raster pattern to define the first grid lines along the first axis and adding thereto second grid lines along a second axis, thereby to define a grid pattern.

14. A method according to claim 13 and wherein said grid pattern lies only interior of the model.

15. A method according to claim 14 and wherein said grid pattern is spaced from the exterior of the model by at least a predetermined thickness.

16. Apparatus for producing a three-dimensional model comprising:

means for selective dispensing of a photopolymer material, layer upon layer;

means for exposing the photopolymer material to define selectable configuration; and

means for curing the exposed portion of each photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer,

and wherein said means for exposing comprises means for directing illumination through a mask including a low resolution, programmable erasable portion associated with a high resolution non-erasable film portion.

17. A method for producing a three-dimensional model comprising;

selective dispensing of a photopolymer material, layer upon layer;

exposing the photopolymer material to define a pattern configuration; and

curing the exposed portion of each photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer, and wherein said step of exposing comprises the step of directing illumination through a mask including a low resolution, programmable erasable portion associated with a high resolution non-erasable film portion.

18. Apparatus for producing a three-dimensional model comprising:

means for depositing, layer upon layer, a photopolymer material;

means for radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer, wherein said means for depositing includes means for selectably forming a diagnostic layer;

mean for analyzing the diagnostic layer; and

means for removing the diagnostic layer before subsequent deposition of other layers.

19. A method for producing a three-dimensional model comprising the steps of;

depositing, layer upon layer, a photopolymer material;

curing each photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer, and wherein said step of depositing includes the step of selectably forming a diagnostic layer;

analyzing the diagnostic layer; and

removing the diagnostic layer before subsequent deposition of other layers.

20. Apparatus for producing a three-dimensional model comprising;

means for selective dispensing of a photopolymer material, layer upon layer in a pattern configuration;

means for curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer; and

optical inspection means for visually inspecting each layer as said layer is formed.

21. Apparatus according to claim 20 and also comprising:

means for exposing the photopolymer material through a mask to define selectable configuration and wherein said optical inspection means comprises means for inspecting said mask.

22. A method for producing a three-dimensional model comprising:

selective dispensing of a photopolymer material, layer upon layer in a pattern configuration;

curing each photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer; and

optically inspecting each layer as said layer is formed.

23. A method according to claim 22 and also comprising the step of:

exposing the photopolymer material through a mask to define selectable configuration and wherein the optical inspection step comprises inspecting said mask.

24. Apparatus for producing a three-dimensional model comprising;

means for selective dispensing a photopolymer material, layer upon layer in a pattern configuration; and

means for radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer, and wherein said means for radiation curing includes;

means for initially partially curing the photopolymer layer to provide a partially cured photopolymer layer,

means for removing uncured material from the partially cured photopolymer layer, and

means for thereafter finally curing the photopolymer layer.

25. A method for producing a three-dimensional model comprising the steps of;

selective dispensing a photopolymer material, layer upon layer, in a pattern configuration; and

radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer, and wherein said step of radiation curing includes the steps of;

initially partially curing the photopolymer layer to provide a partially cured photopolymer layer,

removing uncured material from the partially cured photopolymer layer, and

thereafter finally curing the photopolymer layer.

26. Apparatus for producing a three-dimensional model comprising;

means for selective dispensing of a photopolymer material, layer upon layer in a pattern configuration;

means for radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer; and

means for providing a visually sensible indication on each layer.

29. Apparatus according to claim 26 and wherein said solidifying plate means includes an outer, passive contact plate portion having a low thermal inertia and an inner, active plate portion having a high thermal inertia.

27. A method for producing a three-dimensional model comprising the steps of:

selective dispensing of a photopolymer material, layer upon layer in a pattern configuration;

radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer; and

providing a visually sensible indication on each layer.

28. Apparatus for producing a three-dimensional model comprising;

means for selective dispensing of a photopolymer material, layer upon layer in a pattern configuration;

means for radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer;

means for applying a support material at certain locations of each layer which are not filled by photopolymer prior to deposition onto said layer of a succeeding layer of photopolymer, wherein said support material is a solidifiable material; and

cooling plate means arranged for planar engagement with the layer after application of said support material, for cooling and thus solidifying the solidifiable material.

30. Apparatus for producing a three-dimensional model comprising;

means for selective dispensing of a photopolymer material, layer upon layer in a pattern configuration;

means for radiation curing each said photopolymer layer following deposition thereof and prior to deposition thereon of a succeeding layer of photopolymer; and

means for applying a support material at certain locations of each layer which are not filled by photopolymer prior to deposition onto said layer of a succeeding layer of photopolymer, wherein said support material is a sintered powder.