Debinder for 3D printed objects

Patent metadata

Field	Value
Publication number	US-11235386-B2
Application number	US-201916540725-A
Country	US
Kind code	B2
Filing date	Aug 14, 2019
Priority date	Sep 12, 2017
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

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 debinder system to debind a printed part, comprising:
a storage chamber configured to store a liquid solvent for debinding the printed part;
a process chamber configured to debind the printed part using a volume of the liquid solvent transferred from the storage chamber and to dry the printed 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 storage chamber; and
a controller configured to determine one or more parameters of the debinding based on one or more properties of the printed part,
wherein the controller is further configured to instruct a user, via a user interface, to position the printed part in one or more locations within the process chamber.

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

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

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

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

10. The debinder system of claim 1 , wherein the one or more properties of the printed 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.

11. A debinder system to debind a printed part, comprising:
a storage chamber configured to store a liquid solvent for debinding the printed part;
a process chamber configured to debind the printed 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 printed 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;
a condenser configured to condense the solvent vapor to the liquid solvent and to transfer the liquid solvent to the storage chamber; and
a controller configured to determine one or more parameters of the debinding based on one or more properties of the printed part, and wherein the controller is further configured to instruct a user, via a user interface, to position the printed part in one or more locations within the process chamber.

12. The debinder system of claim 11 , wherein the one or more properties of the printed 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.

13. The debinder system of claim 11 , 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 debinder system of claim 11 , further comprising a purging device configured to remove at least a portion of the solvent vapor from the process chamber.

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

16. The debinder system of claim 11 , wherein the process chamber is configured to heat the printed part in order to dry the printed part and to vaporize at least a portion of the liquid solvent, 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.

17. The debinder system of claim 11 , wherein the process chamber is configured to heat the printed part in order to dry the printed part and to vaporize at least a portion of the liquid solvent, 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;
and wherein the system further comprises a waste chamber coupled to the distill chamber, wherein the waste chamber is removably coupled to the distill chamber via a waste latch.

18. A debinder system to debind one or more printed parts, comprising:
a process chamber configured to debind the one or more printed parts using a volume of a liquid solvent and to dry the one or more printed 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,
a controller configured to determine one or more parameters of the debinding based on one or more properties of the one or more printed parts; and
a user interface,
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, and
wherein the controller is further configured to instruct a user, via the user interface, to position the one or more printed parts in one or more locations within the process chamber.

19. The debinder system of claim 18 , wherein the one or more properties of the one or more printed parts 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.

20. The debinder system of claim 18 , 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.

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