Metal founding – Means to shape metallic material – Continuous or semicontinuous casting
Patent
1988-05-25
1989-09-26
Seidel, Richard K.
Metal founding
Means to shape metallic material
Continuous or semicontinuous casting
164297, 164485, B22D 11124
Patent
active
048693111
DESCRIPTION:
BRIEF SUMMARY
The device and the method which are the objects of the invention relate to the cooling of rotary moulds used for the casting of liquids which are raised to high temperatures. The said device and the said method concern particularly moulds used for the rotary continuous casting of metals or alloys such as steels in order to obtain solid or hollow billets.
It is known to produce around a rotary mould a cooling chamber of which the outer wall, rigid with the mould, is connected to a fluid supply by means of introducing the said fluid.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 : A prior art device for introducing fluid into the cooling chamber of a rotary mould comprising dynamic seals.
FIG. 2 : Prior art device for introducing fluid into the cooling chamber of a rotary mould comprising a labyrinthine controlled leakage seal.
FIG. 3 shows an elevation and a cross section through a device according to the invention.
FIG. 4 shows an enlarged view of the left hand part of FIG. 3 at the level or the fluid introducing means.
FIG. 1 shows a known device for the cooling of a rotary mould (1) which rotates about an axis (X--X) used for the rotary continuous casting of steel. The steel introducing means in the upper part and the means for withdrawing the billet during the course of solidification and positioned in the bottom part are known and are therefore not shown.
In the drawing, the mould is adapted to revolve about the axis (X--X). The cooling chamber (2) is formed by the annular space comprised between the mould wall (1) and an outer wall (3) of revolution which surrounds it. This outer wall (3) comprises fluid inlet apertures such as (4, 5), likewise distributed according to a circumference of axis (X--X), in the vicinity of its upper end and fluid outlet orifices (6, 7) disposed in the vicinity of the bottom end.
The fluid inlet device (8) comprises a fixed annular box (9) mounted in known manner on a support, not shown. This box (9) of revolution surrounds the outer wall (3) at the height of the fluid inlet apertures (4, 5). The box (9) is connected by at least one inlet such as (10) to a cooling fluid supply duct which is known and which is not shown. The box (9) comprises an annular outlet orifice (11) of revolution disposed opposite the inlet apertures such as (4, 5) to the cooling chamber (2). The two edges (12, 13) of the outlet orifice (11) each comprise a lipped seal (14, 15). These seals bear in sliding fashion on the surface of revolution of the outer wall (3), respectively above and below the apertures such as (4, 5). They are orientated in such a way as to prevent emergence to the outside of fluid which passes through the space separating the outlet orifice (11) from the inlet apertures such as (4, 5).
Thus it is possible to introduce into the cooling chamber (2) a fluid such as water from the annular box (9) without observing any substantial fluid losses. This fluid introducing device (8) does however have the serious disadvantage of substantially arresting rotation of the mould about the axis (X--X) due to friction exerted by the two lipped seals over the extent of their zone of annular contact with the wall (3). The higher the pressure, the greater this friction will be. It is therefore necessary, in order to cause the mould to rotate at the desired speed, to use a relatively powerful driving means which for example comprises a bevelled pinion mechanism (16) which meshes with a ring gear (17) mounted around the wall (3), a motor or a mechanical transmission not shown producing in known manner a rotation of the pinion (16). This mechanism increases the manufacturing costs and the cost of maintaining the casting machine. FIG. 2 shows a fluid introducing device (18) which makes it possible to avoid creating a substantial resistant torque which would oppose rotation of a rotary mould (19) and make it possible to simplify the construction of the casting machine as the bar is able to drive the ingot mould by friction. As in the case of FIG. 1, the rotary mould (19) of axis (XI--XI) is surrounded by
REFERENCES:
patent: 3367400 (1968-02-01), Hathorn
patent: 3589435 (1971-06-01), Mougin
patent: 3718178 (1973-02-01), Negre
patent: 3736980 (1973-06-01), Peytavin et al.
patent: 3967674 (1976-07-01), Fort
patent: 4019565 (1977-04-01), Mola
Seidel Richard K.
Vallourec Industries
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