NOZZLE INSERT AND NOZZLE FOR AN INJECTION MOULDING TOOL

Abstract

The presented invention relates to a nozzle insert (100) for an injection moulding tool (300), wherein the nozzle insert (100) comprises: a supply line portion (101) extending in the nozzle insert (100), a multiplicity of nozzle tips (103), and a multiplicity of secondary channels (105), wherein respective secondary channels (105) of the multiplicity of secondary channels (105) are fluidically coupled to the supply line portion (101), wherein a respective secondary channel (105) of the multiplicity of secondary channels (105) is configured to discharge flowable compound, supplied through the supply line portion (101), from a respective nozzle tip (103) of the multiplicity of nozzle tips (103).

Claims

1. Nozzle insert (100) for an injection moulding tool (300), wherein the nozzle insert (100) comprises: a supply line portion (101) extending in the nozzle insert (100), a multiplicity of nozzle tips (103), and a multiplicity of secondary channels (105), wherein respective secondary channels (105) of the multiplicity of secondary channels (105) are fluidically coupled to the supply line portion (101), wherein a respective secondary channel (105) of the multiplicity of secondary channels (105) is configured to discharge flowable compound, supplied through the supply line portion (101), from a respective nozzle tip (103) of the multiplicity of nozzle tips (103).

2. Nozzle insert (100) according to claim 1, characterized in that each secondary channel (105) of the multiplicity of secondary channels (105) extends through a respective nozzle tip (103) of the multiplicity of nozzle tips (103).

3. Nozzle insert (100) according to claim 1, characterized in that at least one secondary channel (105) of the multiplicity of secondary channels (105) is configured to discharge flowable compound from a side surface (107) of a respective nozzle tip (103) of the multiplicity of nozzle tips (103).

4. Nozzle insert (100) according to claim 3, characterized in that the side surfaces (107) of the nozzle tips (103) of the multiplicity of nozzle tips (103) lie on a cylinder surface oriented concentrically with respect to a central axis (M) of the nozzle insert (100).

5. Nozzle insert (100) according to claim 3, characterized in that the side surfaces (107) of the nozzle tips (103) of the multiplicity of nozzle tips (103) have, in an axial direction with respect to the central axis (M), at least in certain portions a contour.

6. Nozzle insert (100) according to claim 1, characterized in that secondary channels (105) of the multiplicity of secondary channels (105) are of equal length.

7. Nozzle insert (100) according to claim 1, characterized in that secondary channels (105) of the multiplicity of secondary channels (105) are of different length.

8. Nozzle insert (100) according to claim 1, characterized in that secondary channels (105) of the multiplicity of secondary channels (105) run symmetrically with respect to the central axis (M) of the nozzle insert (100).

9. Nozzle insert (100) according to claim 1, characterized in that secondary channels (105) of the multiplicity of secondary channels (105) run asymmetrically with respect to the central axis (M) of the nozzle insert (100).

10. Nozzle insert (100) according to claim 1, characterized in that secondary channels (105) of the multiplicity of secondary channels (105) differ from one another in terms of their cross section.

11. Nozzle insert (100) according to claim 1, characterized in that secondary channels (105) of the multiplicity of secondary channels (105) run at an acute angle with respect to the central axis (M) of the nozzle insert (100).

12. Nozzle insert (100) according to claim 1, characterized in that the nozzle insert (100) comprises a first seal (311) configured to seal the nozzle insert (100) in relation to a material tube (201) in a radial direction with respect to a central axis (M) of the nozzle insert (100).

13. Nozzle insert (100) according to claim 12, characterized in that the nozzle insert (100) comprises a second seal (313) configured to seal the nozzle insert (100) in relation to the material tube (201) in the axial direction with respect to the central axis (M).

14. Nozzle insert (100) according to claim 1, characterized in that the nozzle insert (100) comprises at least two nozzle tips (103) and at least two secondary channels (105).

15. Nozzle insert (100) according to claim 1, characterized in that the nozzle insert (100) consists of a highly thermally conductive material.

16. Nozzle (200) for an injection moulding tool (300), wherein the nozzle (200) comprises: a material tube (201), a supply line (203), which extends through the material tube (201), for receiving flowable compound from a source, a nozzle insert (100) according to claim 1.

17. Nozzle (200) according to claim 16, characterized in that the nozzle insert (100) and the material tube (201) form a monolith.

18. Nozzle (200) according to claim 17, characterized in that the nozzle insert (100) and the material tube (201) are connected by way of a connecting interface.

19. Nozzle (200) according to claim 18, characterized in that, in the region of the connecting interface, the nozzle insert (100) forms a neck portion surrounded by the material tube (201).

20. Nozzle (200) according to claim 18, characterized in that, in the region of the connecting interface, the material tube (201) forms a neck portion surrounded by the nozzle insert (100).

21. Nozzle (200) according to claim 18, characterized in that the material tube (201) and the nozzle insert (100) lie flatly on one another in the region of the connecting interface.

22. Injection moulding tool (300) for processing a flowable compound, wherein the injection moulding tool (300) comprises a nozzle insert (100) according to claim 1 and a tool plate (301) with a pre-chamber (303).

23. Injection moulding tool (300) according to claim 22, characterized in that the nozzle tips (103) of the nozzle insert (100) are arranged in the pre-chamber (303).

24. Injection moulding tool (300) according to claim 21, characterized in that respective secondary channels (105) of the multiplicity of secondary channels (105) of the nozzle insert (100) lead, in a side surface (107) of a respective nozzle tip (103), into a path (109) which extends between the respective nozzle tip (103) and a wall (305) of the pre-chamber (303).

25. Injection moulding tool (300) according to claim 21, characterized in that each nozzle tip (103) of the multiplicity of nozzle tips (103) of the nozzle insert (100) is assigned to a gate.

26. Injection moulding tool (300) according to claim 21, characterized in that the injection moulding tool (300) comprises a multi-cavity tool.

27. Injection moulding tool (300) according to claim 21, characterized in that the injection moulding tool (300) comprises a family tool.

28. Production method for producing an article, in which an article is formed by means of a nozzle insert (100) according to claim 1.

Description

[0071] Further features, details and advantages of the invention can be gathered from the wording of the claims and also from the following description of exemplary embodiments with reference to the drawings, in which:

[0072] FIG. 1 shows a possible embodiment of the presented injection moulding system with a possible embodiment of the presented nozzle and a possible embodiment of the presented nozzle insert,

[0073] FIG. 2 shows a detail illustration of the nozzle insert according to FIG. 1,

[0074] FIG. 3 shows a detail illustration of the nozzle according to FIG. 1,

[0075] FIG. 4 shows a detail illustration of the nozzle according to FIG. 3.

[0076] FIG. 1 illustrates an injection moulding tool 300. The injection moulding tool 300 comprises a nozzle 200 and a tool plate 301 which forms a pre-chamber 303.

[0077] The nozzle 200 comprises a material tube 201, a supply line 203 extending through the material tube 201, and a nozzle insert 100.

[0078] The nozzle insert 100 comprises a supply line portion 101 extending through the nozzle insert 100, a multiplicity of nozzle tips 103, and a multiplicity of secondary channels 105.

[0079] Respective secondary channels 105 are fluidically coupled to the supply line portion 101 and configured to discharge flowable compound, supplied from a source through the supply line portion 101, from a respective nozzle tip 103.

[0080] FIG. 2 illustrates a detail view of the nozzle insert 100 according to FIG. 1. It can be seen here that by way of example the secondary channels 105 run symmetrically about a central axis M of the nozzle insert 100 and each open out in a side surface 107 of a respective nozzle tip 103, with the result that the flowable compound at the side surfaces 107 of the nozzle tips 103 passes through a path 109 and, as a result, is heated the entire way through the path 109 along the nozzle tip by thermal energy stored in the nozzle insert 100.

[0081] Since the path 109 between the nozzle tip 103 and a wall of the pre-chamber has a particularly small cross section, the path 109 produces high shear forces in a material flow through the path 109, with the result that agglomerations in the material flow are prevented.

[0082] The path 109 also produces a transfer of thermal energy from the nozzle tip 103 to material flowing in the path 109, with the result that the material is heated up to the end of the nozzle tip 103.

[0083] FIG. 3 illustrates the nozzle 200 in detail. It can be seen here that the nozzle insert 100 is detachably connected to the material tube 201, such that the nozzle insert 100 can be changed.

[0084] FIG. 4 illustrates a further detail view of the nozzle insert 100. Here, a position of a thick film heating element at the end of the material tube 201 is illustrated by arrow 307 and a position of a temperature sensor is illustrated by arrow 309.

[0085] Seal elements 311 and 313 are optionally also illustrated in FIG. 4.

[0086] The invention is not restricted to any one of the embodiments described above and instead can be modified in a very wide variety of ways.

[0087] All of the features and advantages apparent from the claims, the description and the drawing, including structural details, spatial arrangements and method steps, may be essential to the invention both individually and in a very wide variety of combinations.

LIST OF REFERENCE SIGNS

[0088] 100 Nozzle insert [0089] 101 Supply line portion [0090] 103 Nozzle tip [0091] 105 Secondary channel [0092] 107 Side surface [0093] 109 Path [0094] 200 Nozzle [0095] 201 Material tube [0096] 203 Supply line [0097] 300 Injection moulding tool [0098] 301 Tool plate [0099] 303 Pre-chamber [0100] 305 Wall [0101] 307 Arrow [0102] 309 Arrow [0103] 311 Seal [0104] 313 Seal [0105] M Central axis