Metal founding – Including vibrator means – In continuous casting mold
Patent
1997-10-23
2000-01-18
Lin, Kuang Y.
Metal founding
Including vibrator means
In continuous casting mold
164478, B22D 1104
Patent
active
060150068
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to continuous casting moulds and in particular to continuous casting moulds in which at least a part of the mould which includes means defining the mould passage can be oscillated in a direction which is substantially in the direction of casting.
A continuous casting mould for casting a metal strand, such as for example a slab, bloom, billet or a strand of round or more complex cross-section, can be a structure of considerable size, weight and complexity. In order to reduce the weight of the mould which has to be oscillated, it is known from EP-A-0325931 to form a movable mould part which includes means defining the mould passage and to arrange for this movable mould part to be oscillated with respect to a fixed part of the mould structure. The oscillated movable part has to be accurately guided for movement with respect to the fixed part of the mould structure.
SUMMARY
According to the present invention a mould for use in the continuous casting of a metal strand comprises direction which is substantially in the direction of the casting axis of the mould passage; and is characterised by the provision of relative to the fixed mould part, each element having a pair of opposite edges which are of arcuate convex form; and co-operating surfaces on the fixed and movable parts respectively, to allow rocking of the element relative to the surfaces.
It is convenient for the movable part of the mould and that includes the means defining the mould passage to be within the fixed part of the mould. However, the means which define the mould passage may be outside of the fixed part and secured to a structure which is within the fixed part. The guidance elements are then in abutting relation with surfaces on the fixed part of the mould and on the structure respectively.
The guidance elements have their faces urged into abutting relation with parallel surfaces on the fixed and movable parts and the urging means conveniently comprises at least one device which acts between the fixed and movable parts to urge the movable part towards the fixed part so that each guidance element is in contact with its cooperating surfaces. The device may take the form of a further guidance element comprising a plate having a pair of opposite faces which are of arcuate convex form and one of the faces abuts against a surface on the movable part and an adjustable-width spacer is positioned in abutting relation with the other of said faces and a surface on the fixed part. By adjusting the width of the spacer, the movable part can be urged in the direction or directions to remove clearances and/or apply compressive forces to the opposite faces of the other guidance elements.
Alternatively the device could be a spring or the like secured to the fixed and movable parts to urge the movable part towards the fixed part to remove clearances.
Each of the guidance elements must be free to rock on the surfaces against which the faces abut but it is important that the guidance elements are not allowed to slide or skew relative to the surfaces. To prevent sliding or skewing of the elements, each of the elements may be provided with two locating elements such as cylindrical pins, one at each end of the face. At each face of the element the two pins have a common longitudinal axis which is coincident with the line of contact between the element and the surface at the mid displacement position of the movable part of the mould. The two pins extend from opposite edges of the face of the plate. Each pin is mounted on a block which is bolted to one of the parts of the mould and the arcuate edges of the plate and the cooperating surfaces are partially cut-away to capture the pins with the axis of the pins being co-incident with the surface.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be more readily understood it will now be described, by way of example only, with reference to the accompanying drawings in which:
FIG. 1 is a plan view of a mould in accordance with the invention;
FIG. 2 i
REFERENCES:
patent: 3881544 (1975-05-01), Botta, Jr. et al.
patent: 4727924 (1988-03-01), Dobinski et al.
Cassels Ian
Cooper James Nicholas
Davy (Distington) Limited
Lin Kuang Y.
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