# US 11,440,252 B2 · High speed extrusion 3D printer nozzle

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- Number: US 11,440,252 B2
- Document ID: US11440252B2
- Status: Granted
- Kind: B2
- Application number: 16/268,873
- Filed: 2019-02-06
- Published: 2020-01-30
- Granted: 2022-09-13
- Earliest claimed: 2018-07-26
- Assignees: Essentium, Inc.
- Applicants: Essentium Inc.
- Inventors: Erik John Gjovik; William Jack MacNeish, III; Jason Greene; Iris Gisey Euan Waldestrand
- Web page: https://patentgrep.com/patent/US11440252B2

## CPC

- B29C 64/209: Heads; Nozzles
- B23K 9/04: Welding for other purposes than joining, e.g. built-up welding
- B23K 9/167: and of a non-consumable electrode
- B23K 9/173: and of a consumable electrode
- B23K 26/147: {Features outside the nozzle for feeding the fluid stream towards the workpiece}
- B23K 26/342: Build-up welding
- B29C 64/118: using filamentary material being melted, e.g. fused deposition modelling [FDM]
- B29C 64/386: Data acquisition or data processing for additive manufacturing
- B33Y 10/00: Processes of additive manufacturing
- B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor
- B33Y 50/00: Data acquisition or data processing for additive manufacturing
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

## Abstract

A nozzle is configured for receiving and dispensing a 3D printer filament. The nozzle includes a barrel, a heating element, and an end tip. The barrel has an internal bore and an exterior surface. The internal bore has a filament receiving end and a filament discharge end. A heat break is defined in the exterior surface of the barrel. The heating element is proximate the filament discharge end. The heating element includes a heating wire wrapped around the exterior surface of the barrel. The end tip is proximate the filament discharge end. The 3D filament is received in the filament receiving end heated by the heating element and dispensed through end tip proximate the filament discharge end.

## Claims

### Claim 1

A nozzle for receiving and dispensing a 3D printer filament, the nozzle comprising:
a barrel having an internal bore and an exterior surface, wherein the internal bore has a filament receiving end and a filament discharge end, and wherein a channel is defined in the exterior surface of the barrel, and wherein the filament receiving end of the barrel defines two opposing peaks and two opposing valleys;
a heat break defined in the exterior surface of the barrel, wherein the heat break reduces the transfer of heat along the barrel;
a heating element proximate the filament discharge end, wherein the heating element includes a heating wire wrapped around the exterior surface of the barrel; and
a plurality of temperature sensors attached to the exterior surface of the barrel, wherein the plurality of temperature sensors are positioned within the channel of the barrel; and
an end tip proximate the filament discharge end, and wherein the 3D printer filament is received in the filament receiving end is heated by the heating element and dispensed through a discharge orifice in the end tip.

### Claim 2 (depends on 1)

The nozzle of claim 1, further comprising a retaining cap for mechanically retaining the end tip to the barrel, wherein the retaining cap has a first open end for receiving the barrel and a second open end for receiving the end tip.

### Claim 3 (depends on 1)

The nozzle of claim 1, wherein the barrel includes a first shank and a second shank.

### Claim 4 (depends on 3)

The nozzle of claim 3, wherein the heating element is positioned on the second shank.

### Claim 5 (depends on 1)

The nozzle of claim 1, wherein the barrel has a first diameter portion, a second diameter portion, a third diameter portion and a fourth diameter portion.

### Claim 6 (depends on 5)

The nozzle of claim 5, wherein the first diameter portion has a diameter that is greater than a diameter of the second diameter portion.

### Claim 7 (depends on 6)

The nozzle of claim 6, wherein the third diameter portion has a diameter that is equal to the diameter of the first diameter portion.

### Claim 8 (depends on 7)

The nozzle of claim 7, wherein the fourth diameter portion has a diameter that is less than the diameter of the third diameter portion.

### Claim 9 (depends on 1)

The nozzle of claim 1, wherein the barrel and the end tip are received in an internal bore defined in a retaining cap.

### Claim 10 (depends on 1)

The nozzle of claim 1, wherein the heating element includes a bifilar coil.

### Claim 11 (depends on 1)

The nozzle of claim 1, wherein the heat break is one of the following: a necked down section of the barrel and a split in the barrel.