Filament spool and filament spool container, and methods of use thereof

• US 8,132,753 B2
• Filed: 04/04/2011
• Issued: 03/13/2012
• Est. Priority Date: 10/22/2008
• Status: Active Grant

• Current Assignee: Stratasys Incorporated
• Original Assignee: Stratasys Incorporated
• Inventors: Taatjes, Thomas L., Turley, Patrick W., Zalusky, Martin G.
• Primary Examiner(s): Dondero, William E
• Application Number:
  US13/079,244
• Publication Number:
  US 20110174915A1
• Time in Patent Office: 344 Days
• Field of Search: 242/172, 242174-176, 242/470, 242/476.1, 242/566, 242/579, 242/580, 242/587, 242/587.2, 242/587.3, 242/588, 242/588.3, 242/588.6, 242/614, 242/614.1, 242125-1253
• US Class Current: 242/470
• 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 64/255 Enclosures for the building material, e.g. powder containers
• CPC Class Codes: B33Y 30/00 Apparatus for additive manufacturing; Details thereof or accessories therefor
• CPC Class Codes: B33Y 40/00 Auxiliary operations or equipment, e.g. for material handling
• CPC Class Codes: B33Y 50/02 for controlling or regulating additive manufacturing processes
• CPC Class Codes: B65H 2701/52 Integration of elements inside the core or reel
• CPC Class Codes: B65H 75/28 Arrangements for positively securing ends of material

Abstract

A filament spool for use in a filament spool container, where the filament spool comprises a first rim and a second rim offset by an axial shaft, and a series of grooves extending along a first portion of the first rim and configured to receive a filament of a material while the filament is wound around the axial shaft in a first rotational direction.

Claims

1. A method for loading a filament onto a filament spool for use in a digital manufacturing system, the method comprising:

winding a first segment of the filament around an axial shaft of the filament spool in a first rotational direction, wherein the axial shaft is disposed between a first rim and a second rim, the first rim extending perpendicular to the axial shaft and comprising an inner side adjacent to the axial shaft, an outer side opposite of inner side, and a lateral edge offsetting the inner side and the outer side;

extending a second segment of the filament in the first rotational direction from the inner side of the first rim, across a lateral groove extending from the inner side of the first rim to the outer side of the first rim, such that at least a portion of the second segment is inserted through the lateral groove;

extending a third segment of the filament across the outer side of the first rim through at least one groove in the outer side of the first rim such that at least a portion of the third segment has an arcuate arrangement with a curve in the same direction as the first rotational direction; and

restraining part of the third segment of the filament to the outer side of the first rim to maintain the arcuate arrangement in a manner that comprises at least one of snap fitting the third segment of the filament into at least one of the at least one groove in the outer side of the first rim, and inserting part of the third segment of the filament into a filament guide mechanism and mounting the filament guide mechanism on the outer side of the first rim.

2. The method of claim 1, wherein the at least one groove in the outer side of the first rim comprises a series of grooves.

3. The method of claim 1, wherein the lateral groove extends between the inner side of the first rim to the outer side of the first rim in a direction that is non-parallel to the axial shaft and non-parallel to the outer surface of the first rim.

4. The method of claim 1, wherein inserting the part of the third segment of the filament into the filament guide mechanism comprises inserting the part of the third segment of the filament at least partially through a filament pathway in the filament guide mechanism.

5. The method of claim 4, wherein mounting the filament guide mechanism on the outer side of the first rim comprises mounting the filament guide mechanism into a guide mechanism slot located on the outer side of the first rim.

6. The method of claim 4, and further comprising snap fitting the third segment of the filament into at least one of the at least one groove in the outer side of the first rim.

7. The method of claim 4, and further comprising engaging the part of the third segment of the filament with a filament-detection sensor retained by the filament guide mechanism.

8. A method for loading a filament onto a filament spool for use in a digital manufacturing system, the method comprising:

winding a first segment of the filament around an axial shaft of the filament spool in a first rotational direction, wherein the axial shaft is disposed between a first rim and a second rim, the first rim extending perpendicular to the axial shaft and comprising an inner side adjacent to the axial shaft, an outer side opposite of inner side, and a lateral edge offsetting the inner side and the outer side;

extending a second segment of the filament in the first rotational direction from the inner side of the first rim, across a lateral groove extending from the inner side of the first rim to the outer side of the first rim, such that at least a portion of the second segment is inserted through the lateral groove, wherein the lateral groove extends between the inner side of the first rim to the outer side of the first rim in a direction that is non-parallel to the axial shaft and non-parallel to the outer surface of the first rim; and

extending a third segment of the filament across the outer side of the first rim through at least one groove in the outer side of the first rim such that at least a portion of the third segment has an arcuate arrangement with a curve in the same direction as the first rotational direction.

9. The method of claim 8, wherein the at least one groove in the outer side of the first rim comprises a series of grooves.

10. The method of claim 8, and further comprising restraining the part of the third segment of the filament to the outer side of the first rim.

11. The method of claim 10, wherein restraining the part of the third segment of the filament to the outer side of the first rim comprises inserting the part of the third segment of the filament into a filament guide mechanism.

12. The method of claim 11, and further comprising mounting the filament guide mechanism into a guide mechanism slot located on the outer side of the first rim.

13. The method of claim 11, and further comprising engaging the part of the third segment of the filament with a filament-detection sensor retained by the filament guide mechanism

14. The method of claim 12, wherein restraining the part of the third segment of the filament to the outer side of the first rim comprises snap fitting the third segment of the filament into at least one of the at least one groove in the outer side of the first rim.