Metal founding – Means to shape metallic material – Including means to assemble mold parts
Patent
1991-09-10
1992-12-29
Batten, Jr., J. Reed
Metal founding
Means to shape metallic material
Including means to assemble mold parts
164306, 249161, B22D 1720, B22D 1722
Patent
active
051743582
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for supporting and regulating the position of an upper spacer of a mould for pressure casting flat metal products such as slabs.
This mould is carried by a frame and comprises two parallel lateral walls, each formed by a support equipped on the inside with graphite blocks, a longitudinal lower spacer inserted between the two graphite blocks at the base of the latter, a front spacer the lower end of which delimits, with the adjacent end of the lower spacer, an orifice for the molten metal to enter inside the mould between the graphite blocks of the lateral walls and spacers, a rear spacer inserted between the upper and lower spacers and which determines the width of the flat product.
The upper spacer is inserted between the graphite blocks along their upper edges. The lateral walls are associated with means for the transverse displacement of the latter and for clamping them against the spacers in order to form a cavity from which the molten metal cannot leak. To this end, the transverse walls are connected to rigid longitudinal beams parallel to the said walls, carried by the frame and which can be displaced transversely relative to the latter.
The molten metal may be introduced into the mould from a ladle disposed beneath the mould and its frame by means of a refractory tube, the lower part of which is immersed in the molten metal filling the ladle and the upper end of which communicates with a filling spout disposed at the lower part of the mould. As the refractory tube passes through a cover applied in a leaktight manner to a vessel containing the ladle of molten metal, the introduction of compressed air at a suitable pressure into the ladle makes it possible to cause the molten metal to rise inside the tube and into the mould which it progressively fills.
This pressure-casting method, which has been known for a long time, can be applied, in particular, to the casting of semi-manufactured products such as slabs, blooms, billets and tube rounds. In the case of slabs, that is to say of steel products of great width, large-dimension moulds are used.
A pressure-casting mould of the type to which the invention relates is described, in particular, in U.S. Pat. No. 3,590,904. The width of the spacers in the transverse direction determines the thickness of the flat product to be cast. The position of the upper spacer above the lower spacer determines the width of the slab cast in the mould. This upper spacer comprises, at its front end, an end part bent at a right angle, that is to say which is located in the part of the mould placed above the filling tube of the casting vessel.
The upper spacer is held by suitable suspension devices at a certain height above the lower spacer and parallel thereto. It must be possible for it to be regulated in terms of height, as a function of the desired width for the slab to be cast. In the transverse direction, it must be possible for it to be positioned appropriately as a function of the progressive wear of the opposite faces of the graphite blocks between which it is clamped, during successive casts. Finally, this upper spacer must be capable of being completely retracted in order to permit removal of the support frames for the worn graphite blocks.
It is thus known to use devices for suspending the upper spacer which are carried by one of the above-mentioned supports forming a graphite-holder frame. These support frames consist, for example, of pieces with a C-shaped transverse section, inside which the graphite blocks are partially engaged.
This mounting of the suspension devices involves several complications, in particular in relation to the handling of the supports of the graphite blocks when it is necessary to remove the latter or to place the graphite blocks in their position for brushing and coating their inner face, in order to repair them before fresh casts. Moreover, it is observed that, with these known suspension devices, placing the spacer in the casting position for the various thicknesses of slabs involves regulating
REFERENCES:
patent: 3459256 (1969-08-01), Jeffreys
patent: 3590904 (1971-07-01), Woodburn, Jr.
patent: 3646991 (1972-03-01), Jeffreys
patent: 3978908 (1976-09-01), Klaus et al.
patent: 4669524 (1987-06-01), Nelson
Bertin Luc H.
Chalencon Jean-Pierre L.
Courbier Michel F.
Batten, Jr. J. Reed
Clecim
Creusot-Loire Industrie
LandOfFree
Device for supporting and regulating the position of an upper sp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for supporting and regulating the position of an upper sp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for supporting and regulating the position of an upper sp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1881500