Liquid-cooled permanent mold for the continuous casting of metals

1. A liquid-cooled permanent mold for the continuous casting of metals, comprising: mold plates made of copper or a copper alloy, which are connected respectively to an adapter plate or a water-cooling tank by clamping bolts, the clamping bolts being fastened to plateau pedestals that protrude in an insular fashion from the coolant side, which a least partially extend into a coolant gap formed between the mold plate and the adapter plate or the cooling-water tank, wherein the coolant side has cooling ribs that extend into the coolant gap and are situated from place to place between two adjacent plateau pedestals, wherein the cooling ribs are dimensioned in such away that the flow cross section of the coolant gap in areas provided with cooling ribs is smaller than the flow cross section in areas without cooling ribs sufficient to assure an increase in the speed of coolant flowing through the cross section in areas with the cooling ribs relative to the cross section with out cooling ribs.

2. The permanent mold according to claim 1 , wherein the mold plate has a reduced wall thickness in the area of the cooling ribs.

3. The permanent mold according to claim 1 , wherein the flow cross section is reduced by the cooling ribs sufficient to increase the speed of coolant flowing through the coolant gap in areas with the cooling ribs but below a speed at which vapor bubbles may appear.

4. The permanent mold according to claim 2 , wherein the flow cross section is reduced by the cooling ribs sufficient to increase the speed of coolant flowing through the coolant gap in areas with the cooling ribs but below a speed at which vapor bubbles may appear.

5. The permanent mold according to claim 1 , wherein the cooling ribs are situated at the height range of the bath level.

6. The permanent mold according to claim 2 , wherein the cooling ribs are situated at the height range of the bath level.

7. The permanent mold according to claim 1 , wherein the cooling ribs of (i) have a streamlined form adjusted to a flow direction of the coolant or (ii) are oriented parallel to the flow direction.

8. The permanent mold according to claim 2 , wherein the cooling ribs of (i) have a streamlined form adjusted to a flow direction of the coolant or (ii) are oriented parallel to the flow direction.

9. The permanent mold according to claim 1 , wherein the cooling. ribs have longitudinal sections which are at an angle to the flow direction.

10. The permanent mold according to claim 2 , wherein the cooling ribs have longitudinal sections which are at an angle to the flow direction.

11. The permanent mold according to claim 9 , wherein the cooling ribs run in serpentine form in their longitudinal extension.

12. The permanent mold according to claim 11 , wherein the serpentine-formed cooling ribs are adapted in their course to the contour of the plateau pedestals.

13. The permanent mold according to claim 1 , wherein the flow channels having a constant cross section in the flow direction are formed by cooling ribs that are adjacent to one another and by cooling ribs and adjacent plateau pedestals.

14. The permanent mold according to claim 2 , wherein the flow channels having a constant cross section in the flow direction are formed by cooling ribs that are adjacent to one another and by cooling ribs and adjacent plateau pedestals.

15. The permanent mold according to claim 1 , wherein the plateau pedestals are situated aligned in vertical rows and aligned in horizontal rows, the plateau pedestals of two successive horizontal rows are situated offset with respect to one another in the horizontal direction.

16. The permanent mold according to claim 15 , where in the plateau pedestals of two successive horizontal rows are situated offset with respect to each other by one-half the horizontal distance of adjacent plateau pedestals.