Ingot Mold and Process for Manufacturing a Crankcase

Abstract

A permanent mold has a base made of metal. The base has a plurality of first mold portions, which are mutually spaced along a longitudinal axis and which are designed to shape a bearing tunnel of a crankcase. Second mold portions are arranged on the first mold portions and consist of a mold material.

Claims

1.-9. (canceled)

10. A permanent mold, comprising: a base plate made of metal, wherein the base plate has a plurality of first mold portions which are arranged spaced apart from one another along a longitudinal axis and are configured to form a bearing channel of a crankcase, and wherein second mold portions, which are formed from a mold material, are arranged on the first mold portions.

11. The permanent mold according to claim 10, wherein the second mold portions have protrusions which are configured to generate material recesses in the bearing channel.

12. The permanent mold according to claim 10, wherein the first mold portions have arrangement surfaces on which the second mold portions are arranged.

13. The permanent mold according to claim 12, wherein the arrangement surfaces lie in a plane.

14. The permanent mold according to claim 13, wherein the arrangement surfaces have form-fit elements which prevent a displacement of the second mold portions.

15. The permanent mold according to claim 11, wherein the first mold portions have arrangement surfaces on which the second mold portions are arranged.

16. The permanent mold according to claim 15, wherein the arrangement surfaces lie in a plane.

17. The permanent mold according to claim 14, wherein the arrangement surfaces have form-fit elements which prevent a displacement of the second mold portions.

18. The permanent mold according to claim 10, wherein the second mold portions are connected via one or more connecting webs which are configured to form openings in the bearing seat.

19. The permanent mold according to claim 18, wherein in each case, two second mold portions are connected via two connecting webs.

20. The permanent mold according to claim 10, wherein in each case, two second mold portions are connected via two connecting webs.

21. The permanent mold according to claim 10, wherein the second mold portions have core marks.

22. A method for producing a crankcase, the method comprising the steps of: providing a base plate made of metal, the base plate in certain regions or in part forming a bearing seat of a crankcase; and supplementing the base plate by way of an arrangement of second mold portions made of mold material.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a plan view of a core comprising a plurality of second mold portions.

[0026] FIG. 2 is a plan view, and a side view, of a further embodiment of a core comprising a plurality of second mold portions.

[0027] FIG. 3 is a schematic view of one embodiment of a permanent mold.

[0028] FIG. 4 is a schematic view of one embodiment of a base plate, which forms a bearing seat of a crankcase.

DETAILED DESCRIPTION OF THE DRAWINGS

[0029] FIG. 1 shows a plan view of a core comprising a plurality of second mold portions 20, wherein the second mold portions 20 are connected by a plurality of connecting webs 22. Reference designation L denotes a longitudinal axis, wherein the longitudinal axis can also be regarded as an axis of rotation of a crankshaft. It is then schematically illustrated that protrusions 24 extend, so to speak, along the longitudinal axis L, the protrusions being designed to form material recesses in a bearing seat or in a bearing channel of a crankcase.

[0030] FIG. 2 shows substantially that embodiment of a core which is known from FIG. 1, wherein, in the embodiment shown here, second mold portions 20 have no protrusions. However, here, a side view of the core is shown in the upper half of the image, it being possible to see how the second mold portions 20 are connected via the connecting webs 22 in the side view.

[0031] FIG. 3 shows a schematic view of a permanent mold comprising a metallic base plate 10 which comprises first mold portions 12. A longitudinal axis L is oriented virtually perpendicularly with respect to the plane of the drawing. The permanent mold further comprises two schematically illustrated side slides 6 and a corresponding front slide 8, the directions of movement of the slides being indicated by the arrows sketched with an uppercase B. The first mold portions 12 have arrangement surfaces 14 which are oriented virtually at the end side and toward the top and on which second mold portions 20, see also FIG. 1 and FIG. 2 in this respect, are arranged. Two round connecting webs 22 are illustrated in dashed fashion, the webs being designed, and formed, to generate ventilation openings along the longitudinal axis L in the bearing seat, which is formed substantially by the base plate 10. The arrangement surfaces 14 lie in a plane E, the plane being oriented perpendicularly with respect to a horizontal H. The horizontal H corresponds, so to speak, to a cylinder axis P, the cylinder axis being sketched with an arrow which is correspondingly marked and which points toward the top, virtually in the direction of a combustion chamber. Reference designation 2 denotes a schematically illustrated feeder core. It can also be seen that the first mold portion 12 or the first mold portions 12 forms/form a main bearing 3 for a crankshaft (not illustrated in any more detail here).

[0032] For better understanding, FIG. 4 shows a side view of a base plate 10, it being possible to see that the base plate comprises a plurality of first mold portions 12 which form a bearing seat or a bearing channel. A wall of the bearing seat is illustrated in dashed fashion and is provided with the reference designation 5. It can be seen that the wall 5 is formed not only by the first mold portions 12 but also by the second mold portions 20, which are arranged on corresponding arrangement surfaces 14 of the first mold portions 12. In this case, the first mold portions 12 extend along a horizontal or along a cylinder axis P, the cylinder axis being oriented perpendicularly with respect to a longitudinal axis L which can be understood, so to speak, to be an axis of rotation of a crankshaft (not illustrated here) or which extends along the main bearing of the subsequent crankcase.

LIST OF REFERENCE DESIGNATIONS

[0033] 2 Feeder core [0034] 3 Main bearing [0035] 5 Wall [0036] 6 Side slide [0037] 8 Front slide [0038] 10 Mold part, base plate [0039] 12 First mold portion [0040] 14 Arrangement surface [0041] 20 Second mold portion [0042] 22 Connecting web [0043] 24 Protrusion [0044] E Plane [0045] L Longitudinal axis [0046] H Horizontal, vertical axis [0047] B Direction of movement [0048] P Cylinder axis