Apparatus and method for printing large thermoplastic parts during additive manufacturing

Patent metadata

Field	Value
Publication number	US-10933586-B2
Application number	US-201715703558-A
Country	US
Kind code	B2
Filing date	Sep 13, 2017
Priority date	Sep 13, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

Embodiments of the present disclosure are drawn to additive manufacturing apparatus and methods. An exemplary additive manufacturing system may include an extruder, the extruder having an opening dimensioned to receive a material. The apparatus may also include an extruder output in fluid communication with the extruder, wherein the extruder output extends away from the extruder along a longitudinal axis. One or more heaters positioned along at least a portion of the extruder output may also be included, and, as the material passes through the extruder output, the one or more heaters may at least partially melt the material. The system may also include a gear pump in fluid communication with the extruder output for receiving the at least partially melted material, and a nozzle in fluid communication with the gear pump for depositing the at least partially melted material.

First claim

What is claimed is:

1. An additive manufacturing system, comprising:
an extruder having an opening dimensioned to receive a material;
an extruder output in fluid communication with the extruder, wherein the extruder output extends away from the extruder along a longitudinal axis;
one or more heaters positioned along at least a portion of the extruder output, wherein as the material passes through the extruder output, the one or more heaters at least partially melt the material;
a gear pump in fluid communication with the extruder output for receiving the at least partially melted material;
a thermographic camera directed to measure a temperature of the at least partially melted material as the at least partially melted material passes through the extruder output and before the at least partially melted material passes through the gear pump;
a controller operably connected to the thermographic camera;
a nozzle in fluid communication with the gear pump for depositing the at least partially melted material; and
a manually-controllable actuator connected to the controller and configured to cause the controller to increase or decrease a speed at which the at least partially melted material is deposited by the nozzle so as to increase or decrease a cooling time of layers of a part deposited by the additive manufacturing system, wherein the controller is further configured to generate a notification indicative of whether the speed at which the at least partially melted material is deposited should be changed based on the temperature.

2. The system of claim 1 , further comprising a screw extending within the extruder output.

3. The system of claim 2 , wherein rotation of the screw within the extruder output is configured to generate heat sufficient to at least partially melt the material when the material is within the extruder output.

4. The system of claim 1 , wherein the one or more heaters includes a plurality of heaters disposed along a length of the extruder output.

5. The system of claim 1 , further comprising a display, wherein the display is configured to indicate to an operator the temperature of the at least partially melted material.

6. The system of claim 1 , wherein the additive manufacturing system includes a programmable computer numeric control machine.

7. An additive manufacturing system, comprising:
an extruder having an opening dimensioned to receive a material;
an extruder output fluidly connected to the extruder for receiving the material from the extruder, wherein the extruder output extends from the extruder along a longitudinal axis;
one or more heaters operably coupled to the extruder output for heating the extruder output, wherein as the material passes through the extruder output, the one or more heaters at least partially melt the material;
a nozzle in fluid communication with the extruder output for depositing the material once the material is at least partially melted;
a manually-controllable actuator for adjusting a speed of the material through at least a portion of the additive manufacturing system;
a gear pump in fluid communication with the extruder output for receiving the at least partially melted material;
a temperature sensor;
an indicator configured to communicate to an observer a temperature of the at least partially melted material, the temperature being indicative of a current temperature of the at least partially melted material as the at least partially melted material passes through the extruder output and before the at least partially melted material reaches the gear pump; and
a controller operably connected to a thermographic camera and the manually-controllable actuator, wherein the controller is configured to increase or decrease a speed at which the at least partially melted material is deposited by the gear pump in response to an interaction with the manually-controllable actuator so as to increase or decrease a cooling time of layers of a part deposited by the additive manufacturing system, wherein the controller is further configured to generate a notification indicative of whether the speed at which the at least partially melted material is deposited should be changed based on the temperature.

8. The system of claim 1 , further comprising:
first and second side walls supporting a first gantry and a second gantry, wherein the first and second side walls are spaced apart from each other in a first direction, and wherein the first gantry and the second gantry are horizontally spaced apart from each other in a second direction that is orthogonal to the first direction;
said extruder, said extruder output, and said one or more heaters being supported by the first gantry;
wherein the second gantry is configured to perform trimming on the part printed by an applicator head that supports the nozzle; and
wherein the first gantry and the second gantry are each displaceable by respective servomotors.

9. The system of claim 7 , further comprising a screw extending within the extruder output, wherein rotation of the screw within the extruder output is configured to generate heat to at least partially melt the material within the extruder output.

10. The system of claim 7 , wherein the temperature sensor includes the thermographic camera.

11. The system of claim 7 , wherein the controller is configured to adjust a speed of material received by the opening of the extruder.

12. The system of claim 7 , wherein the additive manufacturing system includes a programmable computer numeric control machine.

13. An additive manufacturing system, comprising:
first and second side walls supporting a first gantry and a second gantry wherein the first and second side walls are spaced apart from each other in a first direction, and wherein the first gantry and the second gantry are horizontally spaced apart from each other in a second direction that is orthogonal to the first direction;
an extruder supported on the first gantry and having an opening dimensioned to receive a material and an output that extends away from the extruder along a longitudinal axis;
a nozzle in fluid communication with the extruder for depositing the material, the second gantry being configured to perform trimming on a part printed by an applicator head that supports the nozzle;
a thermographic camera directed to measure a temperature of the material as the material is deposited;
a controller operably connected to the thermographic camera; and
a manually-controllable actuator connected to the controller and configured to cause the controller to increase or decrease a speed at which the material is deposited by the nozzle so as to increase or decrease a cooling time of layers of a part formed by the additive manufacturing system, wherein the controller is further configured to generate a notification indicative of whether the speed at which the material is deposited should be changed based on the temperature.

14. The system of claim 13 , wherein the first gantry and the second gantry are each displaceable by respective servomotors.

15. The system of claim 13 , further including a worktable extending between the first gantry and the second gantry.

16. The system of claim 13 , wherein the thermographic camera is configured to measure the temperature of the material as the material is deposited from the nozzle.

17. The system of claim 1 , wherein the controller is further configured to increase or decrease the speed at which the at least partially melted material is deposited by the nozzle based on a layer print time.

18. The system of clai

Assignees

• Thermwood Corp

Inventors

• Susnjara Kenneth J
• Vaal Scott G
• Smiddy Brian S
• Fuquay Jonathan I

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B33Y40/00

  Auxiliary operations or equipment, e.g. for material handling · CPC title

• B29C64/118 Primary

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title

• B29C48/023

  Extruding materials comprising incompatible ingredients · CPC title

• B29C64/386

  Data acquisition or data processing for additive manufacturing · CPC title