Method and device for producing three- dimensional components with the aid of an overfeed sensor

Patent metadata

Field	Value
Publication number	US-12036732-B2
Application number	US-202117553944-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Dec 1, 2015
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

The invention relates to a 3D printing method and, in particular, a device and a method for setting an overfeed.

First claim

What is claimed is:

1. A method for producing three-dimensional components comprising steps of:
applying a particulate material in layers to a build space in a reception plane with a coating unit having a scraper apparatus, wherein the particulate material is placed on the build space in front of the scraper apparatus; and
selectively solidifying the particulate material; characterized in that the method includes measuring an overfeed of the particulate material at multiple locations;
wherein the measurement takes place during the coating pass
wherein the overfeed is the quantity of powder that is pushed in front of the scraper apparatus at the end of the build space during the coating pass;
wherein the overfeed is measured in front of the scraper apparatus.

2. The method of claim 1 , wherein the measurement takes place at the end of the coating pass.

3. The method of claim 1 , wherein the measurement takes place over an entire coater width.

4. The method of claim 1 , wherein a supply of particulate material is controlled directly by the measurement.

5. The method of claim 2 , wherein the measurement takes place over an entire coater width.

6. The method of claim 3 , wherein and a supply of particulate material is controlled directly by the measurement.

7. A method for producing three-dimensional components comprising steps of:
applying a particulate material in layers to a build space in a reception plane with a coating unit having a scraper apparatus, wherein the particulate material is placed on the build space in front of the scraper apparatus; and
selectively solidifying the particulate material; characterized in that the method includes measuring an overfeed of the particulate material with a plurality of sensors, wherein each of the sensors measure a corresponding portion of the overfeed at a different location along a length of the coating unit in an x-axis and the coating unit moves in a linear direction in a y-axis, wherein the measurement takes place during the coating pass
wherein the overfeed is the quantity of powder that is pushed in front of the scraper apparatus at the end of the build space during the coating pass;
wherein the overfeed is measured in front of the scraper apparatus.

8. A method for producing three-dimensional components comprising steps of:
applying a particulate material in layers to a build space in a reception plane with a coating unit having a scraper apparatus, wherein the particulate material is placed on the build space in front of the scraper apparatus; and
selectively solidifying the particulate material; characterized in that the method includes measuring an overfeed of the particulate material with at least one sensor located in a side wall which the coating unit passes over and measures the particulate material above the at least one sensor;
wherein the overfeed is measured at the end of a coating path of the coating unit after the layer of the particulate material has been deposited onto the build space.

9. The method of claim 8 , wherein the at least one sensor includes a plurality of the sensors, wherein each of the sensors measure a overfeed at a different location along a length of the coating unit in an x-axis and the coating unit moves in a linear direction in a y-axis.

10. The method of claim 8 , wherein each of the at least one sensor is a binary sensor.

11. The method of claim 8 , wherein the at least one sensor includes multiple sensors arranged in a line parallel to the coating unit.

12. The method of claim 8 , wherein a particulate material supply means supplies particulate material to the build space during a pass of the coating unit;
wherein the particulate material supply means is controllable by the at least one sensor.

13. A method for producing three-dimensional components comprising steps of:
applying a particulate material in layers to a build space in a reception plane with a coating unit having a scraper apparatus, wherein the particulate material is placed on the build space in front of the scraper apparatus; and
selectively solidifying the particulate material; characterized in that the method includes measuring an overfeed of the particulate material;
wherein a build container having a build space is provided for building the three-dimensional components,
wherein at least one sensor at an end of a coating path of the coating unit directly measures the overfeed of particulate material over an edge of the build space;
wherein the overfeed is measured at the end of a coating path of the coating unit after the layer of the particulate material has been deposited onto the build space.

14. The method of claim 13 , wherein the at least one sensor includes a plurality of the sensors, wherein each of the sensors measure a overfeed at a different location along a length of the coating unit in an x-axis and the coating unit moves in a linear direction in a y-axis.

15. A method for producing three-dimensional components comprising steps of:
applying a particulate material in layers to a build space in a reception plane with a coating unit having a scraper apparatus, wherein the particulate material is placed on the build space in front of the scraper apparatus; and
selectively solidifying the particulate material; characterized in that the method includes measuring an overfeed of the particulate material;
wherein a build container having a build space is provided for building the three-dimensional components,
wherein the overfeed is measured with at least one sensor for measuring a weight or load of the overfeed;
wherein the overfeed is measured at the end of a coating path of the coating unit after the layer of the particulate material has been deposited onto the build space.

16. The method of claim 15 , wherein method is further characterized by one or any combination of:
the at least one sensor is positioned at an end of the coating path; or
the at least one sensor includes multiple sensors arranged in a line parallel to the coating unit; or
the one or more sensors are binary, digital, analog, and/or chromatographic sensors; or
the method includes regulating the coating unit with a controller and based on the measured overfeed.

17. The method of claim 15 , wherein
the device includes a controller for regulation of the coating unit based on the measured overfeed;
the at least one sensor includes multiple sensors arranged in a line parallel to the coating unit;
optionally wherein the sensors are located in a side wall which the coating unit passes over, and measures the particulate material above the sensors.

18. The method of claim 1 , wherein the overfeed falls into a waste shafter, wherein the waste shaft is an angled waste shaft or a rotated powder waste shaft.

19. The method of claim 1 , wherein the coating unit moves in a direction, wherein the method includes identifying a location of a defect in the overfeed along an axis, wherein the axis is perpendicular to the direction, wherein the defect is a site which is not filled with the particulate material after the passage of the coating unit.

Assignees

• Voxeljet Ag

Inventors

• Ederer Ingo
• Günther Daniel
• Günther Johannes

Classifications

• B29K2105/251

  Particles, powder or granules (expandable particles B29K2105/046) · CPC title

• B33Y30/00

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B22F12/90

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

• B22F12/67

  Blades · CPC title

• B22F10/14

  by jetting of binder onto a bed of metal powder · CPC title