PCD EXTRUSION NOZZLE

Abstract

The invention relates to an extrusion nozzle (1) for processing 3D printing material, having a nozzle base (2) with a seat (22) for fastening in a 3D printing device and an outlet portion (21), said outlet portion (21) comprising a nozzle insert (3), and the nozzle base (2) consisting of a solid carbide, metal or brass and the nozzle insert (3) including a PCD (polycrystalline diamond) material.

Claims

1. An extrusion nozzle for processing 3D printing material comprising a nozzle body comprising a seat for fastening in a 3D printing device and an outlet portion, wherein the outlet portion comprises a nozzle insert, and wherein the nozzle body is made of a solid carbide, metal, or brass, and the nozzle insert comprises a PCD (polycrystalline diamond) material.

2. The extrusion nozzle according to claim 1, wherein the nozzle body and the nozzle insert are formed separately.

3. The extrusion nozzle according to claim 2, wherein the nozzle body and the nozzle insert are connected to one another by means of a substance-to-substance bond.

4. The extrusion nozzle according to claim 3, wherein a solder material used for the connection of nozzle body and nozzle insert melts starting at a temperature of 500° and more.

5. The extrusion nozzle according to claim 1, wherein the outlet portion comprises a recess on the end side, and wherein the recess has a size and shape, which is formed to be complementary to the nozzle insert at least in some sections.

6. The extrusion nozzle according to claim 1, wherein the nozzle insert is made completely of a PCD (polycrystalline diamond) material.

7. The extrusion nozzle according to claim 1, wherein the nozzle insert has a lasered outer contour from all sides.

8. The extrusion nozzle according to claim 1, wherein the nozzle insert has an outlet opening with 2, 3, 4, 5, or 8 mm.

9. The extrusion nozzle according to claim 1, wherein the nozzle insert comprises a front surface with a diameter of 1.5 mm.

10. The extrusion nozzle according to claim 1, wherein the outlet portion is formed to taper at an angle in the range of from 50° to 70°.

11. The extrusion nozzle according to claim 1, wherein the nozzle insert is polished at least in some sections.

12. The extrusion nozzle according to claim 1, wherein the outlet portion is formed to taper at an angle of 60°.

Description

[0021] The invention will be additionally described below on the basis of the example illustrated in the drawings, in which:

[0022] FIG. 1 shows a perspective illustration of an extrusion nozzle for processing 3D printing material according to an exemplary embodiment of the invention;

[0023] FIG. 2 shows a sectional view of a first alternative of the extrusion nozzle from FIG. 1;

[0024] FIG. 3 shows a sectional view of a second alternative of the extrusion nozzle from FIG. 1; and

[0025] FIG. 4 shows a front view of the extrusion nozzle from FIG. 1.

[0026] A perspective view of an extrusion nozzle 1 is shown in FIG. 1, which can be attached to a printing means (not illustrated) for processing 3D printing material.

[0027] The shown extrusion nozzle 1 serves to process 3D printing material in the form of a filament. The extrusion nozzle 1 has a nozzle body 2, which has a threaded seat 22 in the rear part for screwing into the 3D printer. In the front part, the nozzle body 2 has an outlet portion 21, which is formed in one piece with the seat 22. At the front tip, the outlet portion 21 has a nozzle insert 3, which, as described further below and as illustrated in FIG. 2, continues an inner channel, which runs in the outlet channel and seat.

[0028] The nozzle body 2 and the nozzle insert 3 are formed separately. The nozzle body is made of a solid carbide, metal, or brass. The nozzle insert 3 generally comprises a PCD material, wherein the shown nozzle insert 3 is made completely of a PCD material. In the case of abrasive filament materials, the PCD material has a long service life with low breaking strength. The PCD material further has a high thermal conductivity.

[0029] The nozzle body 2 and the nozzle insert 3 are connected to one another by means of a substance-to-substance bond in the manner of a soldering point. For use at high temperatures, the solder material used for the connection of nozzle body and nozzle insert is selected in such a way that it melts starting at a temperature of 500° and more. Silver solder is one example.

[0030] The opening in the center of the nozzle insert 3 has a diameter of 5 mm, wherein the shown example is not limited to this dimension. The nozzle insert 3 has a front surface with a diameter of 1.5 mm.

[0031] In the region between nozzle insert 3 and seat 21, the outlet portion 21 has several surface portions, which are formed to taper at an angle of approximately 60°.

[0032] The nozzle insert 3 is polished on the surface, on the inner side, and on the outer side.

[0033] FIG. 2 is a sectional view of a first alternative of the extrusion nozzle 1 from FIG. 1. In the shown cross section, the extrusion nozzle 1 has a continuous channel 5, in which the filament is transported during the processing of 3D printing material.

[0034] In the right part of the illustration, the extrusion nozzle 1 has a threaded seat 22 for screwing into the 3D printer.

[0035] In the left part of the illustration, the nozzle body 2 has an outlet portion 21, which is formed in one piece with the seat 22 made of solid carbide, metal, or brass.

[0036] At the front tip, the outlet portion 21 comprises a nozzle insert 3, which continues the channel 5 for the transport of the filament. In this alternative, the nozzle insert 3 is arranged at a connection piece 3a made of solid carbide.

[0037] In the case of the illustrated outlet portion 21, a recess 4 is formed on the end side, which has a hexagonal peripheral shape. The recess 4 has a depth and a lateral diameter that the nozzle insert 3, which is formed in a complementary manner, is received almost completely therein with its connection piece 3a. The nozzle insert 3, which is formed in such a complementary manner, has a lasered outer contour from all sides.

[0038] FIG. 3 a sectional view of a second alternative of the extrusion nozzle from FIG. 1, wherein the nozzle insert 3 is formed without connection piece (see FIG. 3a).

[0039] At the front tip, the outlet portion 21 comprises a nozzle insert 3, which continues the channel 5 for the transport of the filament. In the shown example, the nozzle insert is made completely of PCD.

[0040] In the case of the illustrated outlet portion 21, a recess 4 is formed on the end side, which has a hexagonal peripheral shape. The recess 4 has a depth and a lateral diameter that the nozzle insert 3, which is formed in a complementary manner, is received almost completely therein. The nozzle insert 3, which is formed in such a complementary manner, has a lasered outer contour from all sides.

[0041] FIG. 4 is a front view of the extrusion nozzle 1 from FIGS. 1 and 2. The outlet portion 21 supports the nozzle insert 3 in a recess. The channel 5 serves for the transport of the filament.