Selective deposition modeling system and method

• US 6,305,769 B1
• Filed: 06/13/1997
• Issued: 10/23/2001
• Est. Priority Date: 09/27/1995
• Status: Expired due to Term

• Current Assignee: 3D Systems, Inc. (3D Systems Corporation)
• Original Assignee: 3D Systems, Inc. (3D Systems Corporation)
• Inventors: Lockard, Michael S., Leyden, Richard N., Caruso, Anthony L., Thayer, Jeffrey S., Denison, Keith, Merot, Christian M., Stockwell, John S., Bedal, Bryan J. L., Almquist, Thomas A.
• Primary Examiner(s): Yockey, David F.
• Assistant Examiner(s): Brooke, Michael S
• Application Number:
  US08/876,001
• Time in Patent Office: 1,593 Days
• Field of Search: 347/1, 347/37, 364/468.26, 156/58, 427/466, 264/308, 264/401
• US Class Current: 347/1
• CPC Class Codes: B29C 64/112 using individual droplets, e.g. from jetting heads
• 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 40/00 Auxiliary operations or equipment, e.g. for material handling
• CPC Class Codes: B33Y 40/20 Post-treatment, e.g. curing, coating or polishing

Abstract

A system and associated method for forming three-dimensional objects under computer control and from a material which may be rendered flowable and then dispensed on a layer-by-layer basis. The layers of the material solidify or otherwise physically transform upon being dispensed thereby forming successive cross-sections. The dispensing process is repeated whereby successive layers adhere to each other thereby forming the object.

Claims

1. An apparatus for forming a three-dimensional object from a material normally in a solid state but which is flowable when at or above a flowable temperature, comprising:

a material loading module mounted to the apparatus for receiving and rendering the material flowable;

a dispenser connected to the apparatus for selectively dispensing successive layers of the material to form the three-dimensional object, the dispenser being in flow communication with the material loading module;

a platform mounted on the apparatus which is substantially maintained below the flowablc temperature and cooperative with the dispenser such that the successive layers are selectively dispensed thereon,

wherein the material loading module includes a resupply receptacle for receiving a removable container of material, the material being in solid or partially solid phase, a heater positioned relative to and conected to the receptacle for heating material in thc container received in the receptacle to a molten flowable state;

the receptacle further having a fluid flow opening through which molten material flows from the container received in the receptacle to a reservoir in fluid flow communication with the fluid flow opening of the receptacle, the reservoir receiving molten material from the fluid flow opening; and

a planarizer mounted to the apparatus for removing excess material from the successively dispensed layers, the planarized comprising a heated member and a device to remove material from the heated member by vaporizing material.

2. The apparatus of claim 1 further comprising a control workstation for interfacing with an operator, the control workstation being electrically coupled to the at least one control computer.

3. The apparatus of claim 1 further comprising:

an X-stage coupled to the dispenser for reciprocatingly sweeping the dispenser across the platform;

a Y-stage coupled to the platform for moving te platform transversely to the direction of sweeping; and

a Z-stage coupled to the Y-stage for vertically moving the platform.

4. The apparatus of claim 1 wherein the dispenser further includes an ink jet print head.

5. The apparatus of claim 1 further comprising:

a wiper for collecting any unvaporized excess material from the planarizer;

a collection reservoir for collecting the excess material from the wiper, and

a material feeder line extending from the collection reservoir to the material loading module.

6. The apparatus according to claim 1 wherein the platform is contained within a build environment.

7. The apparatus according to claim 6 wherein the build environment is maintained at a temperature of about 25°

C.

8. An apparatus for forming a three-dimensional object from a material normally in a solid state but which may be rendered flowable when maintained above a flowable temperature, comprising:

a material loading module mounted to the apparatus for receiving and rendering the material flowable the material loading module including;

a resupply receptacle mounted to the apparatus for receiving a removable container of material;

a heater positioned in proximity to the receptacle for rendering the material flowable;

a reservoir functionally coupled to the receptacle for receiving material from the removable container and for containing flowable material; and

a dispenser for selectively dispensing successive layers of material to form the three-dimensional object, the dispenser including;

an ink jet print head connected to the material feed line and including a plurality of orifices from which droplets of material are selectively dispensed;

a planarizer for removing excess material from e successively dispensed layers the planarizer comprising a heated member and a device to remove material from the member by vaporizing material;

a material feeder line coupling the reservoir to the dispenser; and

a platform in a build environment which is substantially maintained below the material flowable temperature and on which the successive layers are selectively dispensed, the build environment being maintained at a temperatur of about 25°

C.

9. The apparatus of claim 8 wherein the heated member is maintained above the flowable temperature and contacts the successively dispensed layers thereby renderng flowable at least any material above a desired working surface.

10. The apparatus of claim 9 wherein the member further comprises a rotating cylinder.

11. The apparatus of claim 9 wherein the member further comprises a blade.

12. The apparatus of claim 9 wherein the member is heated to a temperature sufficient to vaporize the at least any material above a desired working surface.

13. The apparatus of claim 12 wherein the member further comprises a wire.

14. The apparatus of claim 9 wherein the device comprises a vacuum.