Metal founding – Means to shape metallic material – Including means to apply coolant to mold or casting
Patent
1991-09-10
1992-10-13
Batten, Jr., J. Reed
Metal founding
Means to shape metallic material
Including means to apply coolant to mold or casting
165168, 249 80, B22D 1804, B22D 2704
Patent
active
051542218
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for fixing and cooling a graphite block of a graphite wall of a mould. More particularly, it relates to a device which makes it possible to cool the individual graphite moulding blocks forming the walls of a mould by introducing a sprayed yet of cooling fluid into the spaces provided inside the blocks.
Walls of this type are, in particular, used in moulds for pressure casting metallurgical products such as slabs. These walls are disposed vertically and opposite one another in order to form the large-dimension faces of these moulds, the other faces being formed by the spacers inserted between these walls.
Cooling devices of this type are, in particular, described in the documents FR 1,557,481 and U.S. Pat. No. 3,590,904. In these devices, the graphite blocks comprise vertical bores into which booms or jets for spraying cooling liquid are introduced. A drawback of these devices is that the liquid running over the walls of the bores falls freely into the pit or the trough provided beneath the mould and mixes with the dust and other debris which collect there. This water must therefore be treated and filtered in order to be discharged or reused.
Another drawback lies in the system for holding the graphite blocks which are held on a plate or graphite-holder frame by small fixing plates which are partially inserted into the cooling bores and are bolted onto the frame. Unless these small fixing plates are completely removed in order to take down the graphite blocks, it is impossible to displace the latter relative to one another, for example in order to clean, after a cast, the joining plane between two blocks if metal has infiltrated therein.
Another system for holding the graphite blocks consists in holding them on the frame by means of small fixing plates inserted into a longitudinal groove in the graphite and bolted onto the frame. One of the major drawbacks of these grooves is that it gives rise to a weakening and an incipient break at the top and at the bottom of the graphite blocks, thereby reducing their life span.
The present invention aims to remedy these drawbacks and to facilitate the positioning and the fixing of the graphite blocks on the graphite-holder frame.
Another aim is to provide uniform cooling and to be able to easily adapt the cooling of each one of the blocks.
With these objectives in view, the subject of the present invention is a device for fixing and cooling a graphite block of a graphite wall of a mould, comprising upper and lower means for fixing the said block on a graphite-holder frame and means for introducing a cooling fluid into vertical bores provided in the block.
According to the invention, this device is characterized in that the lower fixing means form a collector for the cooling fluid introduced into the said bores.
By virtue of the invention, the cooling fluid introduced into the bores of the block may easily be collected and channelled, which makes it possible for it to be reused directly without having to be treated. Moreover, as the collector also fixed the mould on the frames, the construction of the mould is thereby facilitated.
According to a particular arrangement of the invention, the collector comprises, at its upper part, a longitudinal horizontal groove, parallel to the surface of the wall of the mould, this groove receiving a slide or lower thin strip provided with tubular elements inserted into the bores in the graphite block, at the lower end of the latter.
The tubular elements emerge opposite entry orifices in the collector. Contact between the lower thin strip and the collector provides a seal in order to prevent leakages of cooling fluid underneath the graphite block.
The lower thin strip can slide longitudinally in the groove of the collector which, on the one hand, facilitates the positioning of the block relative to the frame insofar as the alignment between the bores in the block and the entry orifices in the collector does not have to be performed with great precision and, on the other hand, makes it possible
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Bertin Luc H.
Courbier Michael F.
Vatant Robert A.
Batten, Jr. J. Reed
Clecim
Creusot-Loire Industrie
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