Device for Encapsulating or Casting Rotors

Abstract

A tool, in particular for encapsulating or casting rotors of electric machines, having an arrangement space which extends along a longitudinal axis and is designed to arrange and encapsulate or cast a component, wherein the arrangement space is delimited at least in sections by at least one adjusting tool, the position of which can be adjusted in such a way that a size of the arrangement space can be changed.

Claims

1.-12. (canceled)

13. A mold for encapsulating or overmolding a component, comprising: an arrangement space which extends along a longitudinal axis and is designed for the arrangement and for the encapsulation or overmolding of the component, wherein the arrangement space is delimited at least sectionally by at least one adjustment tool, the position of which is adjustable in such a manner that a size of the arrangement space is changeable.

14. The mold according to claim 13, wherein the component is a rotor of an electric machine and wherein the at least one adjustment tool is positionable along the longitudinal axis.

15. The mold according to claim 13, wherein the at least one adjustment tool has a sealing region which seals the component axially, at least in regions.

16. The mold according to claim 13, wherein the at least one adjustment tool has a receiving portion which is designed for form-fitted receiving of a rotor shaft.

17. The mold according to claim 13, further comprising: a cavity insert for arrangement of the component being encapsulated, wherein the cavity insert is arranged in a mold arrangement of the injection mold.

18. The mold according to claim 17, wherein the adjustment tool is movable into the cavity insert or movable within the cavity insert.

19. The mold according to claim 17, wherein the cavity insert comprises two insertion elements and wherein a plug-in connector is provided for the connection and closure of the insertion elements.

20. The mold according to claim 19, wherein the plug-in connector comprises a quick-release system.

21. The mold according to claim 13, wherein the adjustment tool is operatively connected to an internal thread for positioning, the thread flanks of the internal thread being oriented transversely to the longitudinal axis.

22. The mold according to claim 21, wherein an adjustment unit is provided for positioning the adjustment tool, which adjustment unit has a toothed ring, wherein the toothed ring encloses the internal thread.

23. An apparatus comprising at least one mold according to claim 13.

24. A method for producing rotors of electric machines comprising: providing a mold which has an arrangement space for the arrangement and encapsulation or overmolding of a component; adjusting a size of the arrangement space to the component being encapsulated/overmolded by moving an adjustment tool to a predefined position, wherein the adjustment tool delimits the arrangement space at least in regions; arranging the component being encapsulated/overmolded in the arrangement space and encapsulating/overmolding the component.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the drawings:

[0038] FIG. 1: shows two schematic views of an embodiment of a mold;

[0039] FIG. 2: shows a further view of an embodiment of a mold;

[0040] FIG. 3: shows the injection mold known from FIG. 2, wherein the mold has been moved;

[0041] FIG. 4: shows an embodiment of a device comprising a plurality of molds.

DETAILED DESCRIPTION OF THE DRAWINGS

[0042] FIG. 1 shows in its left view a mold arrangement comprising a first mold half 11 and a second mold half 12. In conjunction with an adjustment tool 30, these form an arrangement space H in which a component 1, in particular a rotor of an electric machine, is schematically arranged. The adjustment tool is advantageously adjustable along a longitudinal axis L, wherein the longitudinal axis L corresponds to a rotor axis, this adjustability being indicated by means of a double arrow with the reference letter P. For adjustment purposes, an adjustment unit 40 which is drawn schematically is provided. This may be a spindle drive, or similar, for example. A configuration of this kind offers the advantage that a(n injection) pressure can thereby be very easily absorbed. A dividing plane T1 of the mold halves runs transversely to the longitudinal axis L. In the right half of the picture it can be seen that the adjustment tool 30 has been moved to the right, in particular by comparison with the left half of the picture, as a result of which a smaller, in particular shorter, arrangement space H is created, in which a corresponding smaller component 1, in particular a shorter rotor 1, can be arranged.

[0043] FIG. 2 shows in a further schematic representation a mold arrangement comprising a first mold half 11 and a mold half 12, wherein a cavity insert is arranged therein which has a two-part design and comprises a first insertion element 21 and a second insertion element 22. These have a dividing plane T2 which is oriented along a longitudinal axis L of an arrangement space H and perpendicularly to a dividing plane T1 of the mold arrangement comprising the two mold halves 11 and 12. Similarly to FIG. 1, an adjustment tool 30 is provided here, too, wherein an adjustment unit 40 comprises a toothed ring 42 which has an internal thread 44 that is operatively connected to the adjustment tool 30. In particular, a movement or adjustment of the adjustment tool 30 along a movement direction is possible, as represented by the double arrow P. The internal thread 44 advantageously also facilitates a very good support of an injection pressure along the longitudinal axis L. The toothed ring 42 is driven by means of a toothed wheel 46. A servo-drive is advantageously provided which is not depicted in further detail here, however.

[0044] FIG. 3 shows a state in which the adjustment tool 30 has been moved to the left in respect of the left half of the drawing, so that a greater, in particular longer, arrangement space H is created. Components 1, in particular rotors, are already arranged schematically in the arrangement spaces H in FIGS. 2 and 3.

[0045] FIG. 4 shows a device comprising three molds, wherein the right half of the image shows a side view in which the molds are closed. A first mold half 11 and a second mold half 12 can be identified. The mold half 12 is a stationary mold half, for example. Reference number T1 denotes a dividing plane of the molds, wherein this runs vertically in the present case. In particular, the mold comprises three first mold halves 11 and three second mold halves 12. This can be recognized in the left half of the image, in particular. The left half of the image shows a section through the device along the dividing plane T1, wherein the first tool halves 11 lie in the drawing plane, so to speak. Arrangement spaces H are closed or sealed on both sides by adjustment tools 30 in each case, on the top and bottom in the present case. The upper adjustment tools in this case are die-shaped in design and arranged to be moved into, and out of, the arrangement spaces H; cf. also the double arrow with the reference letter P. The lower adjustment tools 30 are used, in particular, for closing and sealing the tools, wherein these are likewise designed to be movable along the vertical axis; cf. the double arrow with the reference letter P.

LIST OF REFERENCE NUMBERS

[0046] 1 component, rotor
11 first mold half
12 second mold half
21 first insertion element
22 second insertion element
30 adjustment tool
40 adjustment unit
42 toothed ring
44 internal thread
46 toothed wheel
H arrangement space
L longitudinal axis
P arrow
T1 mold halves dividing plane
T2 cavity insert dividing plane