Continuous Residue Removal Module for a Three-Dimensional Printing System

1 . A module for cleaning a three-dimensional article supported by a support tray comprising:

a housing having an entrance door and an exit door;

a continuous transport mechanism that transports the support tray along a lateral Y-axis through the entrance door, through a chamber within the housing, and out the exit door; and

one or more nozzles configured to apply one or more fluid jets to remove residue from the three-dimensional article.

2 . The module of claim 1 wherein the support tray includes an upper rim and a lower face, the continuous transport mechanism includes a synchronized pair of belts having upper surfaces, the upper rim is supported by the upper surfaces of the belts, the three-dimensional article hangs down from the lower face into the chamber while the residue is being removed.

3 . The module of claim 2 wherein the belts are chains supported and driven by sprocketed wheels.

4 . The module of claim 1 wherein the housing is divided by two interior doors into three chambers including an entrance chamber, a middle chamber, and an exit chamber.

5 . The module of claim 4 wherein the middle chamber has a greater length along the Y-axis than either the entrance or middle chambers.

6 . The module of claim 4 wherein the one or more nozzles are all disposed within the middle chamber.

7 . The module of claim 4 wherein the entrance chamber includes a heater to preheat and lower the viscosity of the residue.

8 . The module of claim 1 wherein one or more of the nozzles are directed at least partially in a downward direction to direct the residue toward a floor of the chamber.

9 . The module of claim 8 wherein one or more of the nozzles are directed laterally and downwardly.

10 . The module of claim 1 wherein the nozzles are elongated slots.

11 . The module of claim 1 wherein the nozzles emit heated gas.

12 . The module of claim 1 wherein the nozzles emit air jets and further comprising an air handling system that draws air out of a lower portion of the chamber to remove residue aerosol generated as the air jets displace the residue from the three-dimensional article.

13 . A method of cleaning a three-dimensional article comprising:

(a) providing a full support tray having an upper rim with opposed lateral extensions and a lower face coupled to the three-dimensional article;

(b) receiving the opposed lateral extensions onto a continuous transport mechanism;

(c) transporting the full support tray along a lateral Y-axis and into a housing; and

(d) applying one or more fluid jets to the three-dimensional article during the transport to remove residues formed during a three-dimensional printing process.

14 . The method of claim 13 wherein the housing includes an entrance door and the method includes:

opening the entrance door;

passing the full support tray through the opened entrance door; and

closing the entrance door behind the full support tray.

15 . The method of claim 14 wherein the entrance door includes a spring loaded door mounted on a hinge and opening the door includes the transport mechanism pressing a leading end of the full support tray against the door.

16 . The method of claim 15 wherein the spring loaded door includes two opposed spring loaded doors that individually swing on hinges about a proximal end and close at a distal end.

17 . A three dimensional printing system comprising:

a print engine subsystem configured to receive empty support trays and to output full support trays individually supporting fabricated three-dimensional articles;

a module for cleaning including:

a housing;

a continuous transport mechanism configured to receive the full support trays and to transport them through the housing; and

one or more nozzles configured to apply one or more fluid jets to remove residue from the three-dimensional articles.

18 . The three-dimensional printing system of claim 17 wherein the housing includes an entrance door and an exit door, the entrance door opens when the full support tray is transported into the housing and the exit door opens when the full support tray exits the housing.

19 . The three-dimensional printing system of claim 18 wherein the housing includes at least two interior doors that divide the housing into at least three chambers including an entrance chamber having the entrance door, a middle chamber, and an exit chamber having the exit door, the one or more nozzles apply the fluid jets within the middle chamber.

20 . The three-dimensional printing system of claim 19 wherein a heater pre-heats the three-dimensional article in the entrance chamber before the full support tray passes into the middle chamber.