Metal founding – Means to shape metallic material – Continuous or semicontinuous casting
Reexamination Certificate
1999-06-09
2001-11-20
Ngyuen, Nam (Department: 1722)
Metal founding
Means to shape metallic material
Continuous or semicontinuous casting
C164S348000, C164S341000
Reexamination Certificate
active
06318448
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a mold wall of a continuous casting mold. The mold wall includes an inner mold plate and a water box connected to the inner mold plate through screw connections, wherein the inner mold plate has on its side facing the water box webs with grooves extending between the webs, and wherein filler pieces are arranged in the grooves.
2. Description of the Related Art
A mold wall of the above-described type is generally known in the art. The grooves serve as cooling ducts for a cooling liquid, usually water. The filler pieces serve to reduce the cross-section of the ducts so that the flow velocity of the cooling liquid in the cooling ducts is increased. However, the filler pieces do not serve a supporting function. The inner mold wall is fastened to the water box through a plurality of screws which extend at least partially through the water box and are screwed into threaded pieces which are arranged in the inner mold wall.
The mold wall of the prior art has several disadvantages. In particular, the mounting of the threaded pieces in the inner mold plate is very complicated. In addition, the inner mold plate is usually of copper, while the threaded pieces are of steel. Consequently, when a worn inner mold plate is to be replaced, a large quantity of contaminated copper must be treated in a complicated process to be able to reuse the copper.
SUMMARY OF THE INVENTION
Therefore, it is the primary object of the present invention to provide a mold wall of a continuous casting mold which does not have the disadvantages of the prior art.
In accordance with the present invention, the filler pieces each have at least one expanding element for producing a frictionally engaging connection of the filler pieces to the inner mold plate. The screw connections are arranged between the water box and the filler pieces.
As a result of the configuration of the mold wall according to the present invention, the inner mold plate, which is a component which is subject to wear, only has to have the webs for forming the cooling ducts. Further processing of the inner mold plate, particularly mounting the screw connections in the inner mold plate, is not necessary. When this component “inner mold plate” which is subject to wear is disassembled, the elimination of the frictional engagement results in an automatic separation of the inner mold plate of copper from the steel components. Accordingly, it is now much easier to reuse the inner mold plate.
In accordance with a particularly simple structural development of the expanding element, the expanding element has at least one conically tapered expanding plate which can be pressed by means of a screw against one of the webs.
The expanding element can be expanded, for example, by means of a conically tapered expanding disc which is arranged between the screw and the expanding plate. As an alternative or as an additional feature, the screw may conically taper at least in a partial section thereof.
By providing a spring element for the expanding element it is ensured that the frictional engagement between the filler pieces and the webs is maintained even when the mold wall is heated.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
REFERENCES:
patent: 4009749 (1977-03-01), Alberny
patent: 4224977 (1980-09-01), Cygler et al.
patent: 4715425 (1987-12-01), Brosch
patent: 5785112 (1998-07-01), Carrupt et al.
Kueffner Friedrich
Lin I.-H.
Ngyuen Nam
SMS Schloemann--Siemag Aktiengesellschaft
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