Adjustable head mount for digital manufacturing system

• US 8,153,182 B2
• Filed: 10/21/2008
• Issued: 04/10/2012
• Est. Priority Date: 10/21/2008
• Status: Active Grant

• Current Assignee: Stratasys Incorporated
• Original Assignee: Stratasys Incorporated
• Inventors: Comb, James W., Coolidge, Troy M., Styer, Robert E.
• Primary Examiner(s): Cleveland, Michael
• Assistant Examiner(s): Weddle, Alexander
• Application Number:
  US12/255,289
• Publication Number:
  US 20100100224A1
• Time in Patent Office: 1,267 Days
• Field of Search: 118/44, 118/170, 118/220, 118/222, 118/300, 118/323, 118/305, 118/308, 118/500, 222/516, 222/517, 239/264, 239/265, 239/750, 239/751, 264/145, 264/146, 264/148, 264/176.1, 264259-264, 264/266, 264/299, 264/308, 264/309, 264/313, 264/316, 425/90, 425/114, 427/8, 427/258, 427/264, 427/427, 427/427.1, 700/95, 700/98, 700/110, 700/118, 700/119, 700/120, 700/163
• US Class Current: 427/8
• CPC Class Codes: B29C 64/106 using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
• CPC Class Codes: B29C 64/118 using filamentary material being melted, e.g. fused deposition modelling [FDM]
• CPC Class Codes: B29C 64/209 Heads; Nozzles
• CPC Class Codes: B29C 64/25 Housings, e.g. machine housings

Abstract

A head mount for use in a digital manufacturing system, where the head mount comprises a first component supported by at least one gantry of the digital manufacturing system, and a second component configured to retain a deposition head of the digital manufacturing system, and to move relative to the first component in response to a load applied to the deposition head from a platform assembly of the digital manufacturing system.

Claims

1. A head mount for use in a digital manufacturing system that builds three-dimensional models using a layer-based additive technique, the head mount comprising:

a bearing member configured to be mounted to a head gantry of the digital manufacturing system, wherein the bearing member comprises a bearing hook;

a bracket member configured to retain a deposition head of the digital manufacturing system, wherein the bracket member is movably connected to the bearing member, and wherein the bracket member comprises a hook extension; and

at least one biasing component secured between the bearing member and the bracket member to bias the bracket member away from the bearing member so as to engage the hook extension of the bracket member with the bearing hook of the bearing member, wherein the bracket member is moveable against the bias to disengage the hook extension from the bearing hook in response to a load applied to the deposition head from a platform assembly of the digital manufacturing.

2. The head mount of claim 1, wherein the moveable connection between the bracket member and the bearing member comprises a pivot connection around a pivot axis.

3. The head mount of claim 2, and further comprising a second biasing component secured between the bearing member and the bracket member to bias the bracket member relative to the bearing member along an axis that is different from the bias of the at least one biasing component.

4. The head mount of claim 1, wherein the at least one biasing component comprises at least one pre-biased spring.

5. The head mount of claim 4, wherein the engagement of the hook extension of the bracket member with the bearing hook of the bearing member causes the deposition head to attain a substantially repeatable position along an axis of movement of the platform assembly.

6. The head mount of claim 1, wherein the platform assembly is configured to move along a vertical axis, and wherein the load applied to the deposition head from the moveable platform assembly is substantially along the vertical axis.

7. The head mount of claim 1, wherein the bearing hook is a first bearing hook and the hook extension is a first hook extension, wherein the a bearing further comprises a second bearing hook, and the bracket member further comprises a second hook extension, and wherein the bracket member is moveable against the bias to also disengage the second hook extension from the second bearing hook.

8. A head mount for use in a digital manufacturing system that builds three-dimensional models using a layer-based additive technique, the head mount comprising:

a bearing member configured to be mounted to a head gantry of the digital manufacturing system, the bearing member comprising at least one bearing hook;

a bracket member configured to retain a deposition head of the digital manufacturing system, the bracket member comprising at least one hook extension, wherein the bracket member is pivotally connected to the bearing member; and

at least one biasing component secured between the bearing member and the bracket member to bias the bracket member away from the bearing member so as to engage the at least one hook extension of the bracket member with the at least one bearing hook of the bearing member, wherein the bracket member is configured to pivot relative to the bearing member along a pivot axis when a load is applied to the deposition head to disengage the at least one hook extension apart from the at least one bearing hook.

9. The head mount of claim 8, wherein the bracket member further comprises:

a first lateral bracket;

a second lateral bracket opposite of the first lateral bracket;

a front cross plate connecting the first and second lateral brackets; and

a rear cross plate connecting the first and second lateral brackets, and opposite of the front cross plate, wherein the rear cross plate includes the first portion of the bracket member, and wherein the first and second lateral brackets and the front and rear cross plates define a central slot through which the deposition head is configured to at least partially extend.

10. The head mount of claim 9, wherein the bracket member further comprises a base cross plate at which the bracket member is pivotally connected to the bearing member.

11. The head mount of claim 9, wherein the first and second lateral brackets each comprise at least one slot configured to receive and securely retain the deposition head to the first and second lateral brackets.

12. The head mount of claim 8, wherein the at least one first biasing component comprises at least one pre-biased spring.

13. The head mount of claim 8, and further comprising at least one second biasing component secured between the bearing member and the bracket member to bias the bracket member relative to the bearing member in a direction that is substantially parallel to the pivot axis.

14. The head mount of claim 8, wherein the load applied to the deposition head comprises an upward-directed vertical load.

15. A method of operating a digital manufacturing system, the method comprising:

retaining a deposition head of the digital manufacturing system in a head mount of the digital manufacturing system, wherein the head mount comprises a bearing member secured to a head gantry of the digital manufacturing system and a bracket member movably connected to the bearing member, and wherein the deposition head is retained by the bracket member;

engaging a hook extension of the bracket member with a bearing hook of the bearing member with at least one biasing component that is disposed between the bearing member and the bracket member such that the bracket member is biased in a substantially repeatable position along a vertical axis;

moving a platform assembly of the digital manufacturing system in an upward direction along the vertical axis;

applying a load to the deposition head in the upward direction by the movement of the platform assembly in the upward direction; and

moving the deposition head and the bracket member against the bias in response to the applied load from the platform assembly, wherein moving the bracket member against the bias disengages the hook extension of the bracket member from the bearing hook of the bearing member.

16. The method of claim 15, wherein moving the bracket member in response to the applied load from the platform assembly comprises pivoting the bracket member around a pivot axis.

17. The method of claim 16, and further comprising biasing the bracket member relative to the bearing member in a direction that is substantially parallel to the pivot axis.

18. The method of claim 15, and further comprising restricting a range of movement of the platform assembly in the upward direction with at least one safety mechanism.

19. The method of claim 18, wherein moving the deposition head in response to the applied load from the platform assembly comprises moving the deposition head to a height along the vertical axis that is outside of the range of movement of the platform assembly.

20. The method of claim 15, and further comprising:

moving the platform assembly in a downward direction along the vertical axis to remove the load from the deposition head; and

re-biasing the deposition head to a substantially repeatable position along the vertical axis.