Debinder for 3D printed objects

Patent metadata

Field	Value
Publication number	US-10421124-B2
Application number	US-201815938520-A
Country	US
Kind code	B2
Filing date	Mar 28, 2018
Priority date	Sep 12, 2017
Publication date	Sep 24, 2019
Grant date	Sep 24, 2019

Abstract

A debinder provides for debinding printed green parts in an additive manufacturing system. The debinder can include a storage chamber, a process chamber, a distill chamber, a waste chamber, and a condenser. The storage chamber stores a liquid solvent for debinding the green part. The process chamber debinds the green part using a volume of the liquid solvent transferred from the storage chamber. The distill chamber collects a solution drained from the process chamber and produces a solvent vapor from the solution. The condenser condenses the solvent vapor to the liquid solvent and transfer the liquid solvent to the storage chamber. The waste chamber collects a waste component of the solution.

First claim

What is claimed is:

1. A system to print and debind a 3D printed metal part, comprising:
a printer configured to print the 3D printed metal part;
a storage chamber configured to store a liquid solvent for debinding the 3D printed metal part;
a process chamber configured to debind the 3D printed metal part using a volume of the liquid solvent transferred from the storage chamber and to dry the 3D printed metal part;
a distill chamber configured to collect a solution drained from the process chamber and to produce a solvent vapor from the solution; and
a condenser configured to condense the solvent vapor to the liquid solvent and to transfer the liquid solvent to the storage chamber.

2. The system of claim 1 , wherein the storage chamber includes at least one closeable port to receive the liquid solvent, and wherein the storage chamber, the process chamber, the distill chamber, and the condenser are housed within a self-contained and fluid-tight unit to form a closed system.

3. The system of claim 2 , wherein the process chamber includes a lid that is movable to allow access to the interior of the process chamber, and wherein the lid is configured to automatically lock during a debind process.

4. The system of claim 1 , wherein the distill chamber is also configured to collect a waste component of the solution.

5. The system of claim 1 , further comprising a waste chamber removably coupled to the distill chamber and configured to collect a waste component of the solution.

6. The system of claim 5 , wherein the waste chamber is removably coupled to the distill chamber via a waste latch.

7. The system of claim 1 , wherein the process chamber is configured to heat the 3D printed metal part in order to dry the 3D printed metal part and to vaporize at least a portion of the liquid solvent.

8. The system of claim 7 , further comprising a purging device configured to remove at least a portion of the solvent vapor from the process chamber.

9. The system of claim 8 , wherein the purging device includes a fan, a blower, a pump, or a compressor.

10. The system of claim 1 , further comprising a controller configured to determine one or more parameters of the debinding based on one or more properties of the 3D printed metal part, and wherein the controller is further configured to instruct a user, via a user interface, to position the 3D printed metal part in one or more locations within the process chamber.

11. The system of claim 10 , wherein the one or more properties of the 3D printed metal part include at least one of a geometry or a mass, and wherein the one or more parameters include at least one of a debind time, a circulation of the solvent, or a solvent exchange during the debind.

12. A system to print and debind a 3D printed metal part, comprising:
a printer configured to print the 3D printed metal part;
a storage chamber configured to store a liquid solvent for debinding the 3D printed metal part;
a process chamber configured to debind the 3D printed metal part using a volume of the liquid solvent transferred from the storage chamber, wherein the process chamber is also configured to heat and to dry the 3D printed metal part;
a distill chamber configured to 1) collect a solution drained from the process chamber, 2) produce a solvent vapor from the solution, and 3) collect a waste component of the solution; and
a condenser configured to condense the solvent vapor to the liquid solvent and to transfer the liquid solvent to the storage chamber.

13. The system of claim 12 wherein the storage chamber includes at least one closeable port configured to receive the liquid solvent, and wherein the storage chamber, the process chamber, and the distill chamber are contained within a self-contained and fluid-tight unit to form a closed system.

14. The system of claim 12 , further comprising a purging device configured to remove at least a portion of the solvent vapor from the process chamber.

15. The system of claim 14 , wherein the purging device includes a fan, a blower, a pump, or a compressor.

16. The system of claim 12 , further comprising a controller configured to determine one or more parameters of the debinding based on one or more properties of the 3D printed metal part, and wherein the controller is further configured to instruct a user, via a user interface, to position the 3D printed metal part in one or more locations within the process chamber.

17. The system of claim 16 , wherein the one or more properties of the 3D printed metal part include at least one of a geometry or a mass, and wherein the one or more parameters include at least one of a debind time, a circulation of the solvent, or a solvent exchange during the debind.

18. The system of claim 12 , wherein the process chamber includes a lid that is movable to allow access to the interior of the process chamber, wherein the lid is configured to automatically lock during a debind process.

19. A system to print and debind a 3D printed metal part, comprising:
a printer configured to print the 3D printed metal part;
a process chamber configured to debind a 3D printed metal part using a volume of a liquid solvent and to dry the 3D printed metal part;
a distill chamber configured to collect a solution drained from the process chamber and to produce a solvent vapor from the solution;
a condenser configured to condense the solvent vapor to the liquid solvent and to transfer the liquid solvent to the process chamber; and
a purging device configured to remove at least a portion of the solvent vapor from the process chamber,
wherein the process chamber, the distill chamber, the condenser, and the purging device form a closed system and are contained within a standalone fluid-tight unit.

20. The system of claim 19 , wherein the purging device includes a fan, a blower, a pump, or a compressor.

21. The system of claim 19 , further comprising a waste chamber coupled to the distill chamber, wherein the waste chamber is removably coupled to the distill chamber via a waste latch.

22. The system of claim 19 , wherein the process chamber is configured to heat the 3D printed metal part in order to dry the 3D printed metal part and to vaporize at least a portion of the liquid solvent.

23. The system of claim 19 , wherein the process chamber includes a lid that is movable to allow access to the interior of the process chamber, wherein the lid is configured to automatically lock during a debind process.

24. A system to print and debind one or more 3D printed metal parts, comprising:
a printer configured to print the one or more 3D printed metal parts;
a process chamber configured to debind the one or more 3D printed metal parts using a volume of a liquid solvent and to dry the one or more 3D printed metal parts;
a distill chamber configured to collect a solution drained from the process chamber and to produce a solvent vapor from the solution;
a condenser configured to condense the solvent vapor to the liquid solvent and to transfer the liquid solvent to the process chamber;
a purging device configured to remove at least a portion of the solvent vapor from the process chamber, and
a controller configured to determine one or more parameters of the debinding based on one or more properties of the one or more 3D printed metal parts, wherein the process chamber, the distill chamber, the condenser, and the purging device form a closed system and are contained within a fluid-tight unit.

Assignees

• Desktop Metal Inc

Inventors

• Jepeal Daniel R
• Dresens Paul E

Classifications

• B22F10/70

  Recycling · CPC title

• B22F10/322

  of the gas flow, e.g. rate or direction · CPC title

• B22F12/90

  Means for process control, e.g. cameras or sensors · CPC title

• B22F10/66

  by mechanical means · CPC title

• B22F10/64

  by thermal means (control of energy beam parameters for post heating B22F10/364) · CPC title