JPS6036854B2 - Mold blocks for semi-continuous and continuous casting of large metal blocks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold block for semi-continuous and continuous casting of large metal blocks, including a mold platen and a mold having a water chamber.

Large metal blocks - especially aluminum blocks -
It is usually cast in semi-continuous and continuous casting machines with two or more veins in a single draw.

The casting machines in which large profile blocks are cast simultaneously with multiple vanes (for example, a 400x1200 profile with 10 vanes) are arranged vertically. The mold plates used in the casting machines are quite large, each typically having 5-IN mold positions. One or more suction holes are provided for introducing cooling water into the mold platen. In most cases, these suction holes are
Arranged on the side or bottom of the mold platen. The positions of the molds on the mold platen are equidistantly spaced from each other, so that they are located at different distances from the water suction holes. The internal structure of the mold platen is aimed at ensuring a spatially and temporally stable and uniform water supply for the mold. Molds and mold casings are usually of open water construction. That is, the water jacket flowing along the outer surface of the mold casing is in direct contact with the atmosphere on the side facing away from the mold machine. Cooling water flowing onto the outer walls of the mold indirectly absorbs heat through the mold walls from the metal that is continuously cast into the interior of the mold. Therefore, the metal begins to solidify. A water jacket flowing along the walls of the continuously sliding block absorbs the heat of the block directly from the walls of the mold. The amount of water introduced onto the mold per unit time is determined by the cross-sectional dimensions of the block and the rate of descent.

During coagulation. The texture and stress generated in the tsuk are primarily determined by cooling. For example, incorrectly set water discharges or unbalances that occur during cooling can result in rejected parts being cast. The mold is completely or partially surrounded by a water chamber in the mold platen.

The cooling water flows out through sized holes or gaps drilled in close proximity to each other on the side of the water chamber facing the outside wall of the mold and is deposited onto the mold. Since the cooling water requirements of blocks of various cross-sections are significantly different, the water chamber, formed with discharge holes of fixed size, must be able to keep up with the mold at all times required for casting blocks of various profile dimensions. Ideal cooling cannot be guaranteed. The reason is that the flow rate of cooling water flowing through a sized hole or gap is determined by the cooling water discharge rate specified and set according to the technology. This means that the water does not always impinge on the mold with necessarily the same flow rate and location. It is also possible that a set low water supply rate results in such a flow rate during discharge that the water does not even reach the walls of the mold. In this case auxiliary means are used. For example, the water supply can be increased or the cooling water can be conveyed closer to the mold wall by means of an extension device. However, none of these measures provides completely satisfactory results. It is very important that the water jacket adheres as closely as possible to the outer walls of a suitably formed mold, and that it has continuity and can interrupt its continuity at will.

Similarly, it is imperative that the water jacket running down the outer walls of the mold maintain its continuity and uniformity. Cooling of a mold that is supplied with water from a chamber provided with sized holes or water gaps cannot be uniform.

This is because the molds are located at different distances from the location of the water inlet, so that in the mold platen the water is directed to each mold by paths of different lengths and resistances. As a result, cooling of the mold is not uniform. Therefore, there can be large differences in structure, surface, etc. between metal blocks cast at the same time. The fabrication of large surface mold plates with sized holes or water gaps as well as multiple mold positions poses many problems even in the field of design; The construction of a water supply pilgrimage route is complex and difficult.

The water consumption of molds with a constant water gap is not economical. It is an object of the present invention to eliminate the various drawbacks as explained above, and to also provide a method in which the cross section of the water gap in the water stem of the mold surface plate is infinitely variable, and the dimensions of the water gap can be adjusted at any side of the mold. , to produce mold blocks that can be adjusted independently from each other.

The object according to the invention is that in a mold block provided with a mold casing and a mold platen containing a water chamber, a water discharge hole of the water chamber is formed for each gap, and at least one locking hole is formed for each gap. - Achieved by placing tongs in each of these gaps.

These locking tongs are shaped with their front end green tiltable against one of the walls of said gap so that they are engaged with a displaceable set screw in the water chamber, and the spring is placed between them and the wall of the water chamber. The wall of the water chamber gap is provided with packing.

The element carrying the rotukisog tongs is a pin or a spring. If a spring is used, the locking tongue is formed from the spring itself. In a preferred embodiment of the invention, one of the walls of the wall gap is made displaceable and can be engaged with a set screw. , flow rate,
The most advantageous cooling conditions can thus be set in each mold, regardless of its position on the mold wall.

If required, the water gap in the water chamber can be locked
Vei are completely closed by the tongs and are therefore less than the number of molds that can be placed in the mold block.
No wastage of cooling water can be avoided when casting is carried out in n).

The structure and arrangement of the water stems in the mold platen is arranged to ensure that molds for a variety of different profile sizes can be used in the same mold platen.

The construction of the water chamber ensures continuous maintenance, easy replacement of regulating elements and easy cleaning of the mold platen. The details of the invention will be explained below by way of example with reference to the drawings.

The detail in FIG. 1 shows the upper part of the water chamber 1 and one side of the mold 7.

A locking tongue 3 is connected to the water gap 2 of the water chamber 1. A spring 6 is arranged between the locking tongue 3 and the wall of the water chamber 1. Spring 6 is locking tong 3
is biased counterclockwise around pin 4. A pin 4 is arranged in the wall of the water chamber 1 which engages the locking tongue 3. In its basic position, the spring 6 is in a locking position.
Tongs 3 are fastened to the lower wall of the water gap 2, thereby ensuring a maximum cross section for the flow of cooling water. A set screw 5 is attached to the arm of the double retainer bar closer to the retainer 6. A set screw 5 is screwed into the wall of the water chamber 1, i.e. into its cover 8. When the set screw 5 is rotated, it causes the locking tongue 3 to rotate clockwise against the action of the spring 6. This means that the arm of the locking tongue 3 opposite the spring 6 begins to rise and reduces the cross-section of the water gap 2. As the set screw 5 is further rotated, the water gap 2 is gradually decreased.
Finally, the locking tongs 3 abut against the upper wall of the water gap 2. has been completely closed down.
The part of the water gap 2 that comes into contact with the locking tongue 3 is arranged with a suitable packing 9 for safe closure. The set screw 5 can be fixed in the required position. In the embodiment shown in FIG. 2, the flatness of the locking toss 3 adjusting the cross section of the water gap 2 is ensured by the spring 6 itself instead of the pin 4 in the first embodiment.

In this example: Tsuking tongs 3 and spring 6
is made from a single piece. The water gap 2 is closed at the lower limit plate. In this embodiment, the set screw 5 is not engaged directly against the locking tongue 3, but one of the walls of the water gap is displaced with the help of an insert 10, so that the set screw 5 is not engaged directly against the locking tongue 3. 3
and the cross section of the water gap 2. The water gap 2 on the right side of the drawing is shown in its closed position, whereas the water gap 2 on the left side is shown in its open position. Molds 7 are shown on both sides of the water chamber 1. The cooling water flowing out of the water gap 2 impinges on the curved outer mantle of the mold 7 and flows in layers along the outer surface of the block to be cooled. For the sake of brevity, blocks are not shown in the drawings. Although the packing 9 is used on the wall of the water gap 2 in the embodiment described above, absolute complete watertightness is not required when the water gap 2 is closed.

The purpose of the device according to the invention is to allow the minimum possible amount of water to flow out through the water jug of the associated water chamber when no casting is taking place in one of the molds of the molding station. The invention ensures different gap size settings in each cross-section for the water gap.

This is particularly important when affecting the cooling at the corners of the block sections. By using the mold platen with adjustable water gap according to the invention,
Optimal cooling of each block can be achieved.

Water supply to mold positions where no casting is taking place can be stopped by closing the water gap. The water savings achieved in this way are considerable.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a detail of a mold block according to the invention; FIG. 2 is a sectional view of a second embodiment of a water chamber of a mold block according to the invention. On the drawing, 1 is the ``water chamber''; 2 is the ``water gap''; 3 is the ``locking tongue''; 4 is the ``pin''; 5 is the ``set screw'';
6 indicates ``imitation''; 7 indicates ``mold''; 8 indicates ``cover''; 9 indicates ``packing''. Kyoyun. 7 lines. 2

Claims (1)

[Claims] 1. In a mold block for semi-continuous casting of a large metal block having a mold platen including a water chamber and a mold: the discharge hole of the water chamber 1 is configured as a water gap, and each water gap 2 has at least one locking tong 3 is placed;
Locking tongues 3 are formed with their front edges tiltable against one of the walls of said water gap 2, so that they are engaged with a displaceable set screw 5 in the water chamber 1. Mold blocks for semi-continuous and continuous casting of large metal blocks, characterized in that springs 6 are arranged between them and the wall of the water chamber 1. 2. Large metal block semi-continuous and continuous casting mold block as set forth in claim 1: Large metal block semi-continuous, characterized in that the packing 9 is disposed on the wall of the water gap 2 of the water chamber 1. and mold blocks for continuous casting. 3. In the large metal block semi-continuous and continuous casting mold block according to claim 1 or 2:
A mold block for semi-continuous and continuous casting of large metal blocks, characterized in that a tiltable locking tongue 3 is supported on a pin 4. 4 Any one of claims 1 to 3
In the mold block for semi-continuous and continuous casting of large metal blocks as described in paragraph 1, one of the walls of the water gap 2 is displaceable via an insert 10 and is engaged with a set screw 5. Mold block for semi-continuous and continuous casting of large metal blocks.