Device for producing three-dimensional models

{
  "publication_number": "US9925721B2",
  "country": "US",
  "kind": "B2",
  "title": "Device for producing three-dimensional models",
  "abstract": "The present invention relates to a device for manufacture of three-dimensional models by means of a 3D printing process, whereby the build material is deposited on a build platform in layers and the build platform is moveable in the Z-direction and one or several drive units and one or several guide elements is/are provided to move the build platform. In so doing, drive units and guiding elements are arranged in such a way that a movement of the drive units is decoupled from the movement of the guiding elements.",
  "claims": [
    "1. A method for 3D printing comprising the steps of: i) depositing a build layer including one or more build materials on a build platform, wherein the build materials includes a particulate material and the build layer has a height; ii) lowering the build platform; and iii) repeating steps i) and ii) to print a 3D object; wherein the step of lowering the build platform includes a step of vertically driving one or more Z-axis drive units connected to a horizontal drive component for moving the horizontal drive component in a vertical direction; wherein a horizontal guide component is supported by the horizontal drive component, positioned above the horizontal drive component, and is vertically displaced by the moving of the horizontal drive component; wherein the guide component is free to move horizontally relative to horizontal drive component; and wherein the build platform is the horizontal guide component or the build platform is supported by the horizontal guide component and connected to the horizontal guide component.",
    "2. The method of claim 1, wherein the vertical increment is generally equal to the height of the build layer.",
    "3. The method of claim 2, wherein the horizontal guide component is a guide plate, and the horizontal drive component is a drive plate.",
    "4. The method of claim 3, wherein the guide plate is connected to one or more guide elements that are capable of moving only in a generally vertical direction so that the guide plate does not move rotationally or axially in the horizontal plane.",
    "5. The method of claim 4, wherein the drive plate has one or more openings for the one or more guide elements, wherein the openings are sufficiently large to allow for horizontal movement of the drive plate without contacting the guide elements.",
    "6. The method of claim 5, wherein the one or more guide elements inhibits rotation of the build platform.",
    "7. The method of claim 6, wherein the one or more guide elements inhibit horizontal translational motion of the build platform.",
    "8. The method of claim 7, wherein the vertical increment is 20 μm to 500 μm.",
    "9. The method of claim 7, wherein the drive plate is moved by a plurality of the z-axis drive units.",
    "10. The method of claim 9, wherein the z-axis drive units are driven by a common motor.",
    "11. The method of claim 9, wherein each z-axis drive unit includes a drive spindle and a spindle nut.",
    "12. The method of claim 7, wherein the guide plate and the drive plate are connected by axial bearings so that substantially no play between the guide plate and the drive plate occurs in the vertical direction and substantially no horizontal forces can be transmitted between the guide plate and the drive plate.",
    "13. The method of claim 7, wherein the build platform is supported by the guide plate and connected to the guide plate.",
    "14. The method of claim 13, wherein the guide platform and the build platform are connected via a switchable clamping system.",
    "15. The method of claim 13, wherein during the build of the object, the guide plate and the build platform do not move relative to each other.",
    "16. The method of claim 7, wherein the z-axis drive units are mounted on a common frame.",
    "17. The method of claim 1, wherein the method includes moving the horizontal drive component relative to the horizontal guide component in a horizontal direction during the step of lowering the build platform.",
    "18. The method of claim 1, wherein the method includes moving the horizontal drive component relative to the horizontal guide component in a translational horizontal direction during the step of lowering the build platform.",
    "19. The method of claim 1, wherein the method includes rotating the horizontal drive component relative to the horizontal guide component in a horizontal direction during the step of lowering the build platform.",
    "20. The method of claim 1, wherein the horizontal guide component is a guide plate, and the horizontal drive component is a drive plate, the drive plate has one or more openings for the one or more guide elements, wherein the openings are sufficiently large to allow for horizontal movement of the drive plate without contacting the guide elements."
  ],
  "description_excerpt": "The invention relates to a device for manufacturing three-dimensional models as expressed in the generic concept of patent claim 1.\n\nA method for producing three-dimensional objects from computer data is described in the European patent specification EP 0 431 924 51. In this method, a particulate material is deposited in a thin layer onto a platform which, if needed, is surrounded by a chamber and then a binder material is selectively printed on the particulate material using a print head. The particle area onto which the binder is printed sticks together and solidifies under the influence of the binder and, if necessary, an additional hardener. The platform is then lowered by a distance of one layer thickness into a build cylinder and provided with a new layer of particulate material, which is also printed as described above. These steps are repeated until a certain, desired height of the object is achieved. A three-dimensional object is thereby produced from the printed and solidified areas.\n\nThe object produced from the solidified particulate material is embedded in loose particulate material as described above and such is subsequently removed therefrom. This is done, for example, using an extractor. This leaves the desired objects, from which the remaining powder is removed, e.g. by brushing.\n\nOther powder-supported rapid prototyping processes work in a similar manner, for example, selective laser sintering or electron beam sintering, in which a loose particulate material is also deposited in layers and selectively solidified with the aid of a controlled physical radiation source.",
  "cpc": [
    "B29C 64/141",
    "B29C 64/20",
    "B29C 64/232",
    "B29C 64/245",
    "B29C 67/0085",
    "B29K 2105/251",
    "B33Y 10/00",
    "B33Y 30/00",
    "B33Y 40/00"
  ],
  "ipc": [
    "B29C 67/00",
    "B29C 64/141",
    "B29C 64/20",
    "B33Y 30/00"
  ],
  "assignees": [
    "Voxeljet AG"
  ],
  "inventors": [
    "Josef Grasegger",
    "Andreas Dominik Hartmann"
  ],
  "filing_date": "2014-11-19",
  "publication_date": "2018-03-27",
  "grant_date": "2018-03-27",
  "priority_date": "2010-02-04",
  "application_number": "US-201414547676-A",
  "family_id": "44316156",
  "cited_by_count": 4,
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