Additive manufacturing of active devices using dielectric, conductive, and magnetic materials

• US 10,562,226 B1
• Filed: 03/14/2014
• Issued: 02/18/2020
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Southern Methodist University
• Original Assignee: Southern Methodist University
• Inventors: Cohen, Adam, Krueger, Paul, Richer, Edmond
• Primary Examiner(s): Malekzadeh, Seyed Masoud
• Assistant Examiner(s): Cummins, IV, Manley L
• Application Number:
  US14/213,136
• Time in Patent Office: 2,167 Days
• Field of Search: None
• CPC Class Codes: B29C 48/0022 combined with cutting
• CPC Class Codes: B29C 48/05 Filamentary, e.g. strands
• CPC Class Codes: B29C 48/22 with means connecting the layers, e.g. tie layers or undercuts
• CPC Class Codes: B29C 48/266 Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated
• CPC Class Codes: B29C 48/30 Extrusion nozzles or dies extrusion characterised by the shape or cross-section of the extruded article B29C48/03
• CPC Class Codes: B29C 48/325 being adjustable , i.e. having adjustable exit sections
• 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 64/232 for motion along the axis orthogonal to the plane of a layer
• CPC Class Codes: B29C 70/38 Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns application heads for tyres B29D30/28
• CPC Class Codes: B29C 70/382 Automated fiber placement [AFP]
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• 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

Abstract

The present invention includes a process, system and apparatus for multi-material additive manufacturing process comprising: extruding an extrudable material through a nozzle capable of moving along one or more axis and concurrently extruding one or more filaments, wherein the filament is embedded in, on or about the extrudable material from the nozzle.

Claims

1. A system for a multi-material additive manufacturing process comprising:

a nozzle configured to move along one or more axes, the nozzle configured to extrude a solidifiable material to form an extrudate;

a fiber feeding capillary configured to move along the one or more axes, configured to receive one or more solid fibers and configured to guide the one or more solid fibers into contact with the solidifiable material and out through the nozzle, wherein the fiber feeding capillary is positioned within the nozzle, wherein a distal tip of the fiber feeding capillary is configured to extend;

a fiber feeding mechanism configured to advance the one or more fibers through the fiber feeding capillary, the fiber feeding mechanism configured to advance the one or more fibers through the fiber feeding capillary and out through the nozzle concurrently as the nozzle extrudes the solidifiable material, wherein the one or more fibers are embedded within or are in, on or about the extrudate from the nozzle; and

a cutter capable of severing the one or more solid fibers, wherein the distal tip of the fiber feeding capillary comprises a slot, wherein the cutter is positioned within the slot.

2. The system of claim 1, wherein the one or more solid fibers is dispensed nominally coaxial with the extrudate.

3. The system of claim 1, wherein the one or more fibers is a metal, a semiconductor, a ceramic, a conductor, a conductive polymer, a magnetic material, a conductive powder, a fiber, an optical fiber, a tube, or a conductive thermoplastic polymer.

4. The system of claim 1, wherein the one or more solid fibers are wound into coils, formed into a block, formed into a cylinder or other shapes to form one or more actuators, sensors, thermal management structures, switches, transformers, fuses, resistors, capacitors, inductors, antennae, batteries, external connecting pads, variable-resistance resistors, capacitors, inductors, force sensors, pressure sensors, temperature sensors, cores and armatures for electromagnetic devices, capacitor plates, heat sinks, displays, solenoids, heat conduction structures or power supplies.

5. The system of claim 1, wherein two or more of the one or more solid fibers are formed into one or more mechatronic structures.

6. The system of claim 1, wherein the solidifiable material is a thermoplastic material, a dielectric material, an elastomeric material, or a deformable material.

7. The system of claim 1, wherein the one or more solid fibers are connected electrically by a metal, a semiconductor, a ceramic, a conductor, a conductive polymer, a conductive powder, or a conductive thermoplastic polymer.

8. The system of claim 1, further comprising connecting one or more integrated circuits, actuators, sensors, thermal management structures, switches, transformers, fuses, resistors, capacitors, inductors, antennae, batteries, external connecting pads, variable-resistance resistors, capacitors, inductors, force sensors, pressure sensors, temperature sensors, cores and armatures for electromagnetic devices, capacitor plates, heat sinks, displays, solenoids, heat conduction structures or power supplies, to the one or more solid fibers.

9. The system of claim 1, wherein the one or more solid fibers are defined further as one or more sacrificial fibers that when removed create one or more open conduits or vias.

10. The system of claim 1, wherein the one or more solid fibers are surrounded by a dielectric and the dielectric is removable by at least one method selected from laser processing, heating, mechanical stripping, or plasma etching.

11. The system of claim 1, wherein the one or more solid fibers are joined by welding, soldering, brazing, ultrasonic/thermosonic bonding, crimping, winding, pressure contact, or mutual entanglement.

12. The system of claim 1, wherein the solidifiable material comprises a thermoplastic material, the system further comprising a computer that controls extruding the thermoplastic material and the one or more solid fibers.

13. The system of claim 1, wherein the one or more solid fibers is dispensed so that its major axis is substantially parallel to the major axis of the extrudate.

14. The system of claim 1, wherein the fiber feeding capillary is positioned within the nozzle.

15. The system of claim 1, further comprising a clamping shoe connected to the cutter, wherein the clamping shoe is positioned within the slot.

16. The system of claim 15, wherein the clamping shoe and the cutter are positioned relative to a distal tip of the nozzle such that moving the distal tip of the fiber feeding capillary towards the distal tip of the nozzle by a first distance causes the clamping shoe to clamp the one or more solid fibers positioned within the fiber feeding capillary and moving the distal tip of the fiber feeding capillary towards the distal tip of the nozzle by a second distance greater than the first distance causes the cutter to cut the clamped one or more solid fibers.

17. The system of claim 1, wherein the nozzle and the fiber feeding capillary are configured to axially translate relative to each other.

18. A system for a multi-material additive manufacturing process comprising:

a nozzle configured to move along one or more axes, the nozzle configured to extrude a solidifiable material to form an extrudate that forms at least a portion of a multi-material structure;

a fiber feeding capillary positioned within the nozzle and configured to axially translate relative to the nozzle, the fiber feeding capillary configured to move along the one or more axes and configured to receive one or more solid fibers and guide the one or more solid fibers into contact with the solidifiable material and out through the nozzle; and

a fiber feeding mechanism configured to advance the one or more solid fibers through the fiber feeding capillary, the fiber feeding mechanism configured to advance the one or more fibers that form at least another portion of the multi-material structure through the capillary and out through the nozzle concurrently as the nozzle extrudes the solidifiable material; and

a cutter capable of severing the one or more solid fibers, wherein a distal tip of the fiber feeding capillary comprises a slot, wherein the cutter is positioned within the slot.