Automated additive manufacturing system for printing three-dimensional parts, printing farm thereof, and method of use thereof

• US 8,961,167 B2
• Filed: 12/21/2012
• Issued: 02/24/2015
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Stratasys Incorporated
• Original Assignee: Stratasys Incorporated
• Inventors: Swanson, William J., Mannella, Dominic F., LaBossiere, Joseph E., Hansen, Michael W., Upadhyaya, Saurav, Schloesser, Ronald G.
• Primary Examiner(s): Gupta, Yogendra
• Assistant Examiner(s): LE, NINH V
• Application Number:
  US13/724,629
• Publication Number:
  US 20140178585A1
• Time in Patent Office: 795 Days
• Field of Search: 425/174.4, 425/375, 264/308, 118/37
• US Class Current: 425/375
• CPC Class Codes: B05C 13/00 Means for manipulating or holding work, e.g. for separate articles B05C1/0821 takes precedence
• CPC Class Codes: B29C 64/112 using individual droplets, e.g. from jetting heads
• CPC Class Codes: B29C 64/236 for motion in a direction within the plane of a layer
• CPC Class Codes: B29C 64/245 Platforms or substrates support structures intended to be sacrificed after manufacture B29C64/40
• CPC Class Codes: B29C 64/25 Housings, e.g. machine housings
• CPC Class Codes: B29C 64/30 Auxiliary operations or equipment

Abstract

An additive manufacturing system comprising a platen assembly configured to restrain and release a film, a head gantry configured to retain a print head for printing a three-dimensional part on the restrained film, and a removal assembly configured to draw the film having the printed three-dimensional part from the platen assembly and to cut the drawn film.

Claims

1. An additive manufacturing system comprising:

a platen gantry;

a platen assembly comprising;

a platform portion operably retained by the platen gantry, and having a surface;

a retention bracket biased towards the platform portion and configured to engage the surface of the platform portion for restraining a film therebetween, and to disengage from the surface to release the film; and

a wheel;

a head gantry configured to retain a print head for printing a three-dimensional part on the restrained film; and

a removal assembly comprising a drive roller, wherein the wheel of the platen assembly and the drive roller are configured to nip the film therebetween when the platen assembly engages the removal assembly to draw the released film having the printed three-dimensional part from the platen assembly.

2. The additive manufacturing system of claim 1, wherein the surface of the platform portion comprises at least one indentation configured to draw a vacuum across the surface.

3. The additive manufacturing system of claim 1, and further comprising a support shaft configured to retain a supply of the film, wherein the support shaft is separate from the platen assembly.

4. The additive manufacturing system of claim 1, wherein the removal assembly comprises:

a motor;

a power screw configured to receive rotatable power from the motor; and

a cutting unit threadedly engaged with the power screw, wherein the cutting unit is configured to cut the drawn film.

5. The additive manufacturing system of claim 1, wherein the removal assembly is separate from the platen assembly and does not move with the platen assembly.

6. The additive manufacturing system of claim 1, and further comprising:

a chamber in which the platen assembly and the removal assembly are located; and

a heating unit configured to heat an environment within the chamber.

7. The additive manufacturing system of claim 6, and further comprising:

a chamber door the provides access to the chamber;

a motor; and

a mechanism operably connecting the chamber door and the motor to open and close the chamber door based on an operation of the motor.

8. The additive manufacturing system of claim 7, wherein the chamber door comprises a bi-fold door.

9. An additive manufacturing system comprising:

a platen assembly configured to restrain and release a film, where the platen assembly comprises a wheel;

a head gantry configured to retain a print head for printing one or more three-dimensional parts onto the restrained film;

a platen gantry configured to move the platen assembly along a first axis relative to the print head while the film is restrained;

a removal assembly comprising a drive roller, wherein the wheel of the platen assembly and the drive roller are configured to nip the film therebetween when the platen assembly engages the removal assembly to draw the released film having the one or more printed three-dimensional parts; and

a mechanism for retaining a supply of the film, wherein the mechanism is not retained by the platen assembly such that movement of the platen assembly along the first axis can unwind the film from the supply.

10. The additive manufacturing system of claim 9, wherein the platen assembly comprises:

a platform portion having a surface configured to receive the film; and

a retention bracket biased against the platform portion to restrain the film against the surface.

11. The additive manufacturing system of claim 10, wherein the platen assembly further comprises retention arms connected to the platform portion, and wherein the retention arms are supported by the platen gantry.

12. The additive manufacturing system of claim 9, wherein the removal assembly comprises a cutting mechanism that is configured to cut the drawn film from the supply of the film.

13. The additive manufacturing system of claim 9, and further comprising:

a chamber in which the platen assembly and the removal assembly are located;

a heating unit configured to heat an environment within the chamber;

a chamber door that provides access to the chamber;

a motor; and

a second mechanism operably connecting the chamber door and the motor to open and close the chamber door based on an operation of the motor.

14. The additive manufacturing system of claim 9, wherein the additive manufacturing system is a first additive manufacturing system of a plurality of additive manufacturing systems in a printer farm, wherein each of the plurality of additive manufacturing systems includes a receiving device configured to receive the film having the printed three-dimensional parts from the additive manufacturing system.

15. The additive manufacturing system of claim 9, wherein the platen gantry is configured to move the platen assembly along the first axis relative between a raised position and a lowered position, and wherein the platen assembly engages the removal assembly at the lowered position.

16. The additive manufacturing system of claim 15, wherein the platen assembly is configured to release the film at the lowered position, and to restrain the film at one or more positions along the first axis between the lowered position and the raised position.

17. The additive manufacturing system of claim 9, and further comprising a hard stop located along the first axis of movement of the platen assembly.

18. The additive manufacturing system of claim 17, wherein the platen assembly comprises a platform portion and a retention bracket biased against the platform portion to restrain the film against the platform portion, and wherein the retention bracket is configured to contact the hard stop to lift the retention bracket from the platform portion to release the film.