Apparatus for production of three-dimensional objects by photosolidification

• US 5,135,379 A
• Filed: 11/29/1988
• Issued: 08/04/1992
• Est. Priority Date: 11/29/1988
• Status: Expired due to Term

• Current Assignee: Efrem V. Fudim
• Original Assignee: Efrem V. Fudim
• Inventors: Fudim, Efrem V.
• Primary Examiner(s): Chiesa, Richard L.
• Application Number:
  US07/277,226
• Time in Patent Office: 1,344 Days
• Field of Search: 425/174.4, 425/174, 425/162, 425/425, 264/22, 264/25, 264/219, 264/250, 264/255, 264/1.7, 430/321, 430/306, 430/309, 430/271, 427/53.1, 427/54.1, 427/55, 250/432 R, 250/433, 250/492.3, 250/492.1
• US Class Current: 425/174.4
• 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 64/40 Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof

Abstract

An improved apparatus forms three-dimensional objects in layers by modulating irradiation of liquid photopolymers, either stepwise by alternating photopolymer deposition and irradiation, or continuously by simultaneous deposition and irradiation. Photopolymer is deposited onto open, unfenced and uncontained, substrate and is contained by a photopolymer wall formed around the object simultaneously with it by supplemental irradiation, for providing to irradiated layer unobstructed access critical to apparatus simplification, automation, fabrication time and to feasibility of continuous forming. To decrease drastically fabrication time, whole layer is irradiated simultaneously using masks photoplotted on a roll of film or a matrix of miniature individually controlled components tightly packed similar to liquid-crystal displays, with shrinkage distortion minimized by constraining the irradiated photopolymer surface and/or by solidifying infinitely thin surfaces in continuous mode.

Claims

1. An apparatus for producing a three-dimensional object from photopolymer in successive portions, said apparatus comprising:

(a) object support means for supporting said object as it is formed,

(b) irradiation means spaced from said object support means for successive irradiation of layers of quantities of uncured photopolymer to form successive portions of said object, said irradiation means having a surface,

(c) separate photopolymer deposition means for successive deposition directly onto said surface of irradiation means of said layers of said quantities of uncured photopolymer, and

(d) positioning means for mutual repositioning of said object support means and said irradiation means for attachment of said layers of said quantities of photopolymer to said object upon irradiation.

2. An apparatus of claim 1 and additionally including additional irradiation means for forming several parts of said object at the same time.

3. An apparatus of claim 1 and additionally including means for preserving subsequent cross-linking capability of irradiated photopolymer.

4. An apparatus of claim 1 wherein said positioning means and said photopolymer deposition means include means for providing desired space between said irradiation means and said object, and means for filling-in said space with uncured photopolymer.

5. An apparatus for producing three-dimensional objects from photopolymer, said apparatus comprising:

(a) object support means for supporting said object;

(b) photopolymer deposition means for depositing uncured photopolymer;

(c) irradiation means for irradiating said uncured photopolymer; and

(d) wall forming means for irradiating said uncured photopolymer to form a wall around said object for containing uncured photopolymer around said object.

6. An apparatus of claim 5 and additionally including suspender forming means for forming suspenders of portions of said object to said wall.

7. An apparatus for producing three-dimensional objects from photopolymer, said apparatus comprising:

(a) object support means for supporting said object;

(b) photopolymer deposition means for depositing uncured photopolymer; and

(c) an array of irradiating components, each said irradiating component modulating irradiation of a portion of said uncured photopolymer to provide in combination irradiation dictated by configuration of said object.

8. An apparatus of claim 7 wherein said irradiating components include components for modulating radiation transmittance.

9. An apparatus of claim 7 wherein said irradiating components include components for modulating direction of radiation.

10. An apparatus of claim 7 wherein said irradiating components include components for modulating generation of radiation.

11. An apparatus of claim 7 wherein said photopolymer deposition means include a number of photopolymer dispensing components, said photopolymer dispensing components being positioned between said irradiating components.

12. An apparatus of claim 7 and additionally including means for positioning said array in contact with said uncured photopolymer, and means for preserving subsequent cross-linking capability of irradiated photopolymer.

13. An apparatus for producing three-dimensional objects from photopolymer by continuous forming, said apparatus comprising:

(a) object support means for supporting said object;

(b) photopolymer deposition means for continuous deposition of uncured photopolymer; and

(c) irradiation means for providing irradiation of said uncured photopolymer concurrently with said continuous deposition, said irradiation means modulating cross-sectional pattern of said irradiation according to object cross-section being formed.

14. An apparatus of claim 13 and additionally including means for altering mutual positioning of said object and said irradiation means.

15. An apparatus of claim 13 and additionally including wall forming means for irradiating said uncured photopolymer to form a wall around said object.

16. An apparatus of claim 13 wherein said photopolymer deposition means include photopolymer dispensing means for dispensing said uncured photopolymer in a reciprocating fashion.

17. An apparatus of claim 13 wherein said irradiation means comprise an array of irradiating components, each said irradiating component modulating irradiation of a portion of said uncured photopolymer to provide in combination irradiation pattern dictated by configuration of said object.

18. An apparatus of claim 17 wherein said photopolymer deposition means include a number of photopolymer dispensing components, said photopolymer dispensing components being positioned between said irradiating components.

19. Irradiation means for providing collimated radiation in a certain direction within a given spacial angle to said direction, said means comprising:

(a) a source of uncollimated radiation emitting said collimated radiation in combination with undesired radiation at angles bigger than said spacial angle;

(b) a number of partitions for dividing said uncollimated radiation into smaller beams and for absorbing said undesired radiation from said beams.