Process of making a three-dimensional object

• US 6,645,412 B2
• Filed: 05/11/2001
• Issued: 11/11/2003
• Est. Priority Date: 04/20/1999
• Status: Expired due to Term

• Current Assignee: Stratasys Incorporated
• Original Assignee: Stratasys Incorporated
• Inventors: Priedeman, William R. Jr.
• Primary Examiner(s): Tentoni, Leo B.
• Application Number:
  US09/854,220
• Publication Number:
  US 20020017743A1
• Time in Patent Office: 914 Days
• Field of Search: 264/219, 264/308
• US Class Current: 264/219
• CPC Class Codes: B29C 2071/022 Annealing
• CPC Class Codes: B29C 2791/005 Using a particular environment, e.g. sterile fluids other than air
• CPC Class Codes: B29C 41/36 Feeding the material on to the mould, core or other substrate
• CPC Class Codes: B29C 41/52 Measuring, controlling or regulating
• CPC Class Codes: B29C 64/106 using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
• CPC Class Codes: B29C 64/118 using filamentary material being melted, e.g. fused deposition modelling [FDM]
• CPC Class Codes: B29C 64/40 Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
• CPC Class Codes: B29C 71/02 Thermal after-treatment B29C71/0063 and B29C71/0072 take precedence
• CPC Class Codes: B29K 2055/02 ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B33Y 70/10 Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
• CPC Class Codes: C08K 5/0016 Plasticisers
• CPC Class Codes: C08L 33/02 Homopolymers or copolymers of acids; Metal or ammonium salts thereof
• CPC Class Codes: G05B 2219/49019 Machine 3-D slices, to build 3-D model, stratified object manufacturing SOM

Abstract

High-performance thermoplastic materials are used in building a three-dimensional model and its supports, by fused deposition modeling techniques. In a preferred embodiment, the thermoplastic resin comprising used as the modeling material is selected from the group consisting of a polycarbonate resin, a polyphenylsulfone resin, and a polycarbonate/acrylonitrile-butadiene-styrene resin. An amorphous thermoplastic resin which self-laminates, bonds weakly to the modeling material, has a heat deflection temperature similar to the heat deflection temperature of the modeling material, and has a tensile strength of between 5000 psi and 12,000 psi is used as a support material. In a preferred embodiment, the thermoplastic resin used as the support material is selected from the group consisting of a polyphenylene ether and polyolefin blend, a polyphenylsulfone and amorphous polyamide blend, and a polyphenylsulfone, polysulfone and amorphous polyamide blend.

Claims

1. In a process for making a three-dimensional object by dispensing a first thermally-solidifiable material in molten form at a first extrusion temperature in a predetermined pattern so as to define the three-dimensional object in coordination with dispensing of a second thermally-solidifiable material in molten form at a second extrusion temperature so as to define a support structure for the three-dimensional object, the improvement comprising the steps of:

providing as the first thermally-solidifiable material a modeling material comprising a first thermoplastic resin and having a heat deflection temperature of greater than 120°

C.; and

providing as the second thermally-solidifiable material a support material comprising a second thermoplastic resin selected from the group consisting of a polyphenylene ether and polyolefin blend, a polyphenylsulfone and amorphous polyamide blend, and a polyphenylsulfone, polysulfone and amorphous polyamide blend.

2. The process of claim 1, wherein the modeling material contains at least 70 weight percent of the first thermoplastic resin and the support material contains at least 70 weight percent of the second thermoplastic resin.

3. The process of claim 1, wherein the first thermoplastic resin comprising the modeling material is selected from a group consisting of a polycarbonate resin, a polyphenylsulfone resin, and a polycarbonate/acrylonitrile-butadiene-styrene resin.

4. The process of claim 1, wherein the modeling material contains up to about 20 weight percent of a filler.

5. The process of claim 1, wherein the support material contains up to about 20 weight percent of a filler.

6. The process of claim 1, wherein the second thermoplastic resin is a polyphenylene ether and polyolefin blend and the first thermoplastic resin is selected from the group consisting of a polycarbonate resin and a polycarbonate/acrylonitrile-butadiene-styrene resin.

7. The process of claim 6, wherein the second thermoplastic resin is a polyphenylene ether and high-impact polystyrene blend.

8. The process of claim 6, wherein the support material contains between about 50 and 90 weight percent polyphenylene ether and between about 10 and 50 weight percent of a polyolefin, and the modeling material contains at least 70 weight percent polycarbonate.

9. The process of claim 6, wherein the support material contains between about 40 and 80 weight percent polyphenylene ether and between about 20 and 60 weight percent of a polyolefin, and the first thermoplastic resin is a polycarbonate/acrylonitrile-butadiene-styrene resin.

10. The process of claim 1, wherein the second thermoplastic resin is selected from the group consisting of a polyphenylsulfone and amorphous polyamide blend and a polyphenylsulfone, polysulfone and amorphous polyamide blend, and the first thermoplastic resin is a polyphenylsulfone resin.

11. The process of claim 10, wherein the second thermoplastic resin is a polyphenylsulfone, polysulfone and amorphous polyamide blend containing between about 60 and 90 weight percent polyphenylsulfone, between about 1 and 40 weight percent polysulfone and between about 10 and 40 weight percent amorphous polyamide blend.

12. The process of claim 10, wherein the second thermoplastic resin is a polyphenylsulfone and amorphous polyamide blend containing between about 60 and 90 weight percent polyphenylsulfone and between about 10 and 40 weight percent amorphous polyamide blend.

13. The process of claim 1, wherein the modeling material has a melt flow in the range of 5 to 30 gms/10 minutes under a 1.2 kg load at the first extrusion temperature, and the support material has a melt flow in the range of 5 to 30 gms/10 minutes under a 1.2 kg load at the second extrusion temperature.

14. The process of claim 1, wherein the heat deflection temperature of the support material is within about 20°

C. of the heat deflection temperature of the modeling material.

15. The process of claim 1, and further comprising the steps of:

using the modeling material to build the support structure; and

using the support material to build the three-dimensional object.

16. In a process for making a three-dimensional object by dispensing a first thermally-solidifiable material in molten form at a first extrusion temperature in a predetermined pattern so as to define the three-dimensional object in coordination with dispensing of a second thermally-solidifiable material in molten form at a second extrusion temperature so as to define a support structure for the three-dimensional object, the improvement comprising the steps of:

providing as the first thermally-solidifiable material a modeling material comprising a first thermoplastic resin selected from the group consisting of a polycarbonate resin, a polyphenylsulfone resin, and a polycarbonate/acrylonitrile-butadiene-styrene resin, the modeling material having a heat deflection temperature of greater than 120°

C.; and

providing as the second thermally-solidifiable material a support material that comprises a second thermoplastic resin and which self-laminates, bonds weakly to the modeling material, has a heat deflection temperature of within about 20°

C. of the heat deflection temperature of the modeling material, has a tensile strength of between 5000 psi and 12,000 psi, and which has an amorphous shrinkage characteristic.

17. The process of claim 16, wherein the modeling material has a melt flow in the range of 5 to 30 gms/10 minutes under a 1.2 kg load at the first extrusion temperature, and the support material has a melt flow in the range of 5 to 30 gms/10 minutes under a 1.2 kg load at the second extrusion temperature.

18. The process of claim 16, and further comprising the steps of:

using the modeling material to build the support structure; and

using the support material to build the three-dimensional object.

19. The process of claim 16, wherein the modeling material contains up to about 20 weight percent of a filler.

20. The process of claim 16, wherein the support material contains up to about 20 weight percent of a filler.

21. The process of claim 16, wherein the modeling material contains at least 70 weight percent of the first thermoplastic resin and the support material contains at least 70 weight percent of the second thermoplastic resin.

22. The process of claim 21, wherein the second thermoplastic resin is selected from the group consisting of a polyphenylene ether and polyolefin blend, a polyphenylsulfone and amorphous polyamide blend, and a polyphenylsulfone, polysulfone and amorphous polyamide blend.

23. The process of claim 22, wherein the second thermoplastic resin is a polyphenylene ether and polyolefin blend and the first thermoplastic resin is selected from the group consisting of a polycarbonate resin and a polycarbonate/acrylonitrile-butadiene-styrene resin.

24. The process of claim 23, wherein the second thermoplastic resin is a polyphenylene ether and high-impact polystyrene blend.

25. The process of claim 24, wherein the support material contains between about 50 and 90 weight percent polyphenylene ether and between about 10 and 50 weight percent high-impact polystyrene, and the modeling material contains at least 70 weight percent polycarbonate.

26. The process of claim 23, wherein the support material contains between about 40 and 80 weight percent polyphenylene ether and between about 20 and 60 weight percent of a polyolefin, and the first thermoplastic resin is a polycarbonate/acrylonitrile-butadiene-styrene resin.

27. The process of claim 22, wherein the second thermoplastic resin is selected from the group consisting of a polyphenylsulfone and amorphous polyamide blend and a polyphenylsulfone, polysulfone and amorphous polyamide blend, and the first thermoplastic resin is a polyphenylsulfone resin.

28. The process of claim 27, wherein the second thermoplastic resin is a polyphenylsulfone, polysulfone and amorphous polyamide blend containing between about 60 and 90 weight percent polyphenylsulfone, between about 1 and 40 weight percent polysulfone and between about 10 and 40 weight percent amorphous polyamide blend.

29. The process of claim 27, wherein the second thermoplastic resin is a polyphenylsulfone and amorphous polyamide blend containing between about 60 and 90 weight percent polyphenylsulfone and between about 10 and 40 weight percent amorphous polyamide blend.

30. An additive process for making three-dimensional objects, comprising the steps of:

dispensing a modeling material in a flowable state in a predetermined pattern defining a three-dimensional object having overhanging portions that require support during formation, the modeling material comprising a first high-melt flow amorphous thermoplastic resin having a heat deflection temperature of at least 120°

C.; and

dispensing a support material in a flowable state in the space beneath the overhanging portions of the three-dimensional object in coordination with the dispensing of the modeling material to form a three-dimensional support structure for the object, the support material comprising a second high-melt flow amorphous thermoplastic resin which self-laminates, bonds weakly to the modeling material, has a heat deflection temperature of within about 20°

C. of the heat deflection temperature of the modeling material, and has a tensile strength of between 5000 psi and 12,000 psi.

31. The process of claim 30, wherein the modeling material contains at least 70 weight percent of the first high-melt flow amorphous thermoplastic resin and the support material contains at least 70 weight percent of the second high-melt flow amorphous thermoplastic resin.

32. The process of claim 31, wherein the high-melt flow amorphous thermoplastic resin is selected from the group consisting of a polycarbonate resin, a polyphenylsulfone resin, and a polycarbonate/acrylonitrile-butadiene-styrene resin, and the second high-melt flow amorphous thermoplastic resin is selected from the group consisting of a polyphenylene ether and polyolefin blend, a polyphenylsulfone and amorphous polyamide blend, and a polyphenylsulfone, polysulfone and amorphous polyamide blend.