DE1957222A1 - Mold - Google Patents

Description

EREDI GNUTTI METALLI S. P.A. BRESCIA (Italy)

Mold

The invention relates to an expedient and advantageous training a mold for cooling molten metals, especially for Copper or its alloys.

Such molds are usually made of forged copper and ring-shaped, wherein the mold interior can have any cross-section. On the outside, the mold has a special one Enclosed chamber for receiving cooling water, which cooling water can be returned. In the case of the known molds this The water is kind in a vertical direction, namely from bottom to top passed through the cooling jacket of the mold. However, this procedure has a low heat exchange coefficient and requires more In addition, a large amount of cooling water or other coolant.

The purpose of the invention is to avoid these disadvantages and to provide cooling a mold with the highest efficiency and the lowest consumption

10981

■ " L * ^mm

Water versus flow rate and amount

of the molten metal without the mold device excessively

to claim or destroy which naturally strong thermal Exposed to tension.

Such a mold for cooling molten metals, in particular
of copper or its alloys, is characterized according to the invention by a coaxial main cooling jacket with an overflow and
™ a tangentially arranged supply line on the shell base. This tangential

Supply line forces the coolant flow which enters through this supply line in spirals around the Kokillenaussenwand from bottom to top.

This mold designed according to the invention consists of the following for this purpose .Share:

A supply line for cooling water;

a main cooling jacket coaxial with the mold with a tangential one Feed line into this chamber, which comes from the main feed line;

} a collection and distribution chamber for a second direct cooling;

a water drain that brings the water to a cooling device, from where it can be returned;

e.in movable, piston-like closure for a lower end of the Mold.

In the accompanying drawings, for example, embodiments of the mold according to the invention shown, showing:

Fig. 1: an axial section through the mold in side view,
Fig. E: a top view,

Fig. 3 ϊ a cross section along the line AA of Fig. 1,
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Fig. 4 ϊ a cross section along the line B-B of Fig. 1,

and FIG. 6: a side view and a top view of a mold closure and

and FIG. 8: the same representations of a modified embodiment.

According to the illustration in Figure 1, the mold consists of a cylinder 2, which is forged in copper. This cylinder sits with a flange in a plate 10, to which it is fastened with screws 11.

A seal 4 is resistant to high temperatures and sits between the mold and the plate 10.

A water supply line 1 is equipped with a control or shut-off valve 8.

The cooling water circuit takes place in a housing 5, which under the Plate 10 is fastened by means of screws 12, as well as in another housing 6 which is fastened to the housing 5 by means of screws 13.

Inside the first-mentioned housing 5 is also located coaxially to the Main cooling jacket 21 arranged in the mold, which is supplied with the coolant via a supply line 20. This supply line 20 is now according to the invention arranged tangentially, as can be seen more clearly in FIG. This feed line 20 comes from the main feed line 1.

The main cooling jacket 21 is connected via pipes 22 and bores 23 a collection chamber 24 in the housing 6 in communication. These lines 22 have a total cross-section of approximately half the cross-section of the supply line 20, so that this change constantly creates a pressure in the

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Main cooling jacket 21 is maintained.

The lower housing 6 is provided at its lower end with an annular section in which bores 26 are arranged. These bores 26 are evenly distributed around the outer circumference of the ring section and are at a certain angle inwardly towards the ingot 30 obtained from the mold. These bores 26 allow a second direct cooling of the ingot after it emerges from the lower ψ end of the mold.

A second row of bores 25 is coaxial with the first row of bores 26 arranged in the ring section of the housing 6, the individual bores of which, however, are arranged offset to the bores 26. These holes 25 allow the water to drain off in cases where a second direct cooling is not or only partially required.

Below the ring section of the housing 6 is a rotatable coaxially Ring 3 arranged, which is in one piece with a round mold cross-section can be formed, while he is polygonal. Mold cross-section from individual segments can exist.

This rotatable ring 3 is now also with two rows of holes 25a and 26a, which are arranged in an alternating order opposite the two rows of bores 25 and 26 of the housing 6. To this In this way, one obtains a water outlet from the collecting chamber 24 either only through "the bores 26 and 26a with a coaxial position to one another, while the bores 25 and 25a are closed, or through the bores 26 and 26a and 25 and 25a, depending on the more or less large Need for a second direct cooling.

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This makes it possible to regulate the direct cooling achieved that the ring 3, which is held by screws 14, here is equipped with slots that allow it to be twisted to a certain extent Allow ring 3 opposite the ring section of the housing 6. As a result of this rotation, the bores 25 come with the bores 25a or the bores 26 with the bores 26a in mutual, coaxial alignment, so that in this way by a more or less wide overlapping of the bores, the outflow of the coolant flow can be regulated in a simple and effective manner.

In the case of a polygonal mold cross-section, as already mentioned, this Ring formed in several parts, the segments then being individually displaceable. In this case, too, you have the option of using the To regulate cooling to a large extent.

In this case, too, the total cross-section of the bores is 26 or and 26 approximately two thirds smaller than the cross section of the supply line 20, so that a pressure is always maintained within the collecting chamber 24 will.

The coolant supply line 1 also contains a connection and discharge chamber 28, through which the water can be directed to a cooling device, from where it then flows back again.

The supply line 1 is equipped with valves 7, whereby each individual Chill the water inflow into the connecting and discharge chamber can be regulated in the case of several chill molds.

Between the supply line 1 and the two housing parts 5 and 6 is also a connection plate 15 is arranged. This plate 15 sits between the

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Supply line and the two housing parts 5 and 6 and is in connection with holes 20 and 27. ' It is equipped with some rustproof bushings 17 and rubber seals.

In Figure 1 and in particular in Figures 5 and 6 is a mold closure 31 shown, with which the mold can be closed at its lower end. This axially movable, piston-like closure 31 is on its upper side in the embodiment according to Figures 5 and 6 provided with a dovetail-shaped recess 32, the Bottom opposite / piston top runs diagonally. This deepening serves for anchoring the cast ingot 30 in a simple and effective manner. To solve the bar this is then in a simple manner in the direction of the arrow M so that it can be drawn from it without difficulty due to the special shape and arrangement of this recess solves.

In the modified embodiment according to Figures 7 and 8 is the piston-like closure 31 on its upper side with a dovetail-shaped one Increase 33 equipped, which acts in the same way as the recess 32 according to Figures 5 and 6 and for anchoring the cast Barrens 30 'serves.

The cooling water circuit runs in such a way that the cooling water comes out the supply line 1 enters the main cooling jacket 21 through the supply line 20 which - as mentioned - is arranged tangentially to the mold 2 and the Cooling water flows upwards in spirals around the outer wall of the mold. In this way, an excellent heat exchange effect is achieved.

At the upper end of the main cooling jacket 21, the cooling water is through the mentioned ring seal 4 held back, since a leakage of water during the pouring process is very dangerous. Rather, the cooling water flows

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through the overflow pipes 22, the total cross-section of which only the sharks e of the cross section of the supply line 20, so that this cross-section reduction a constant pressure in the main cooling jacket 21 is maintained.

This overflow pipe 22 in the housing part 5 are in communication with Bores 23, which direct the water to the aforementioned collection chamber, where it is then used in the manner described for a second cooling of the obtained ingot is distributed. When the "water" gets into this collecting chamber 24, it can be used further in various ways will:

a) It can be completely countered through the angled holes 26 and 26 a the bars are diverted in order to achieve a very effective second direct cooling by the water on the entire outer circumference of the ingot.

b) The water can partially through the axial bores 25 and 25a can be derived if, in the case of certain alloys, the second cooling can only take place within certain limits.

c) The water can be completely drained through the hole 27, which in their cross section by means of the valve 7 over each mold individually can be regulated if it is a device with several mold knurls. In this case, the valve 8 is also required for adjustment of the supply lines.

In the latter case, the water coming from the pipes will be diverted into the chamber 28 of the feed line 1 and from there into a collecting tank, from where it damn, if necessary after cooling and filtering, is pumped back into the circulation.

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Claims (5)

- S PATENT CLAIMS 1. Mold for cooling molten metals, especially copper or its alloys, characterized by a coaxial main cooling jacket (Zl) with an overflow (23) and a tangentially arranged supply line (20) on the shell bottom, which the coolant flow in spirals around the mold outer wall heads up. 2. Mold according to claim 1, characterized by overflow lines (22, 23), leading to an annular plenum chamber (24) for a second direct cooling 'lead and their total cross-section about half of the cross-section of the Feed line (20) is. 3. Mold according to claim 1 and 2, characterized by two against each other rotatable rings or ring sections under the annular collection chamber (24), each with two rows offset from one another and alternately superimposed by turning the ring (25, 25a, 26, 26a) are equipped, which have a total cross-section of about have two thirds less than the supply line (20) of the main cooling jacket (21), wherein the one row of bores (25, 25a) leads to a discharge, while the other row (26, 26a) for a second direct cooling against 'the outer surface of the cast ingot (30) is directed. 4. Mold according to claim 3, characterized by an integrally formed Ring (3) with a round mold cross-section and a multi-part design with a polygonal cross-section, the segments being individually displaceable are. 5. Mold according to claim 1, characterized by a lower axially movable, piston-like closure (31) with an oblique, dovetail-shaped Indentation (32) or elevation (33) for anchoring the cast ingot (30) on its upper side, the center line of which is radial is arranged and its width to the outside of the piston circumference zuirrm t. 1098U / 1 344 BATH ORIGINAL Blank page