JPS5937703B2 - Continuous casting mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an assembly type continuous casting mold characterized by a method of installing short side walls of the partition.

In the continuous casting method for steel, which has been developing rapidly in recent years, twin casting in particular is attracting attention as a method that greatly contributes to the productivity of continuous casting equipment.However, in the conventional variable width mold for twin casting, Similarly to the short side walls, the short side walls are simply held between the long side walls, so when the long side wall on the movable side is moved back during width change, the short side walls can be held by the width adjustment device, but the short side of the middle partition The wall had to be temporarily held in place by some means.

In this case, the same slab drawing mechanism is used, resulting in twin casting of equal width, and therefore the short walls of the partition must be temporarily held accurately at the center between the short walls.

Furthermore, when connecting and fixing the movable side long side wall to the fixed side long side wall after width change adjustment, conventionally, a connecting bar was fixed to the fixed side long side wall between the opposing ends of both long side walls. The tip of the bar was fixed to the long side wall of the moving side with bolts, but in this conventional method, there was only a gap of about 5 mm between the lower end of the mold and the upper end of the roller apron, and the lower part of the bar was removed when changing the width. The two bolts could not be removed without lifting the mold.

Therefore, with the conventional variable width mold for twin casting, it takes time and effort to accurately position the short side wall of the partition between the short side walls and to sandwich both the short side wall and the long side wall, or to change or replace the width. The drawback was that it was time consuming.

The present invention was created in order to solve the above-mentioned conventional problems, and the short side wall of the middle partition is made wider than the short side wall, and both sides of the short side wall of the middle partition are placed on opposite sides of the long side wall. By adopting a molded structure in which the parts are fitted through a charging groove and are supported by a stopper provided inside the charging groove, and one side of the short side wall of the partition is fixed to the long side wall, It is possible to accurately position the short side walls of the medium partition between the short side walls without requiring a separate temporary holding means as in the past, and to securely hold the medium partition in that position even during the width change. To provide a simple continuous casting mold whose short side walls can be easily replaced.

Hereinafter, the present invention will be explained with reference to the embodiments illustrated in the drawings. A charging groove 3 is provided, and a molded plate 4 is provided on opposing surfaces on both sides of the central portion in the longitudinal direction in a form divided into three parts at the charging groove 3.

Reference numeral 5 denotes opposing short side walls, and when the molded plates 6 provided on each opposing surface are loosened from the long side walls 1, the molded plates 4, 4 of both long side walls 1 are slid into contact with each other. It is connected via a guide mechanism 7 to an advancing/retracting operation mechanism 8 provided on the movable long side wall 1 so that it can be operated forward and backward.

Reference numerals 9a and 9b are intermediate short side walls located in the center between both short side walls 5, and are formed wider than the short side walls 5, and the long side walls 1
When the tension between the two sides is loosened, both sides fit into the facing surfaces of the long side walls through the charging grooves 3, and the overhanging surfaces 2 in the charging grooves 3 are supported as drop stops, and the fixed side It is fixed to the long side wall 1 with bolts 10.

Moreover, the short side walls 9a, 9b of the middle partition are formed by pushing in a U-shaped bridge-like connector 11 having an inclined surface between the upper and lower end sides by tightening the bridge bolts 12. 9
By firmly fixing b, they are connected to each other in a crimped state.

A molded plate 13, which is held between the molded plates 4, 4 of the opposing long side wall 1, is provided on the surface of the intermediate partition short side wall 9a t9b.

Tie bolts 14 pass through the opposing long side walls 11 from the movable side to the fixed side at the top and bottom of both ends in the longitudinal direction, and nuts 15 are fitted into the fixed side protrusions, and the movable side long side walls 1
A disc spring 22 is inserted between the outside and the tie bolt head.

By tightening the opposing long side walls 1 with the elastic force of the disc spring 22, the molded plates 4, 4, 6.13
The molding spaces 17 are configured such that they can be formed in pairs on the left and right sides.

Further, a tower-shaped pedestal 21 is provided with the tie bolt head inside, and a hydraulic jack 16 is provided at the tip of the pedestal in contact with the tie bolt head.By pushing the tie bolt with this hydraulic jack, the long side wall is fixed. The width of the molding space can be changed by loosening the tightness between the two walls and sliding the opposing short side walls 5 forward and backward.

Each long side wall 1, short side wall 5, and partition short side wall 9a to 9b are each constituted by a water cooling wall that individually supplies and drains cooling water, and in the drawing, the partition short side wall 9a is shown.

The cooling passage is shown only for 9b.

Reference numerals 18 and 19 indicate water supply pipes and drain pipes for this cooling passage.

In the above configuration, when replacing the short side walls 9a and 9b of the middle partition, first loosen the fastening between the long side walls 1 by the tie bolts 14 by jacking up, and then remove the bolts 10 for attaching the short side walls of the middle partition. Partition short side wall 9a
, 9b are lifted up as one piece with a hanging fitting 20 provided on the upper part thereof and removed from between the charging grooves 3.3.

Then, the new intermediate partition short side walls 9a, 9b may be set in the center between the short side walls 5, 5 by reversing the procedure.

In this case, the overhanging surface 2 acts as a stopper between the charging grooves 3 and 3, so it is only necessary to drop the bolt into the space between the charging grooves 3 and 3.
0/Because it can be set accurately in the center between the short side walls 5.5 by fixing, there is no need for temporary holding or positioning as in the conventional method, and therefore the short side of the partition can be set accurately in the center between the short side walls. 9a and 9b can be replaced easily and quickly.

The fixed side and movable side long side walls 1 can be connected and fixed by tightening the long side walls in the direction opposite to each other, which is easier than before, and furthermore, since the tightening and loosening can be reliably performed by the disc spring 22 and the hydraulic jack 16, The above replacement work can be made easier and faster.

In this embodiment, the protruding surface 2 is provided in the charging groove 3 to prevent the inner partition short side walls 9a and 9b from falling. It goes without saying that a drop stop may be provided integrally with the inner lower portion or separately.

As described above, the present invention comprises making the short side wall of the middle partition wider than the short side wall, fitting both sides of the short side wall of the middle partition into the opposing surfaces of the long side wall through insertion grooves, and It is supported by a locking lever provided inside the insertion groove, and one side of the short side wall of the medium partition is fixed to the long side wall.As a result, the short side of the medium partition is fixed by the positioning and holding effect of the insertion groove. Is it easy to replace side walls? This is advantageous in terms of maintenance, and the width of the short side wall of the middle partition fixed to one of the long walls can be easily changed without the need for temporary holding as in the conventional case. Wall replacement can be done easily and quickly.

Furthermore, the above configuration allows for easy use of existing molds for twin casting.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention in use, Fig. 2 is a plan view, and Figs. 3, 4, and 5 are A--A in Fig. 2.
They are cross-sectional views taken along lines A, B-B, and C-C. 1... Long side wall, 2... Overhanging surface, 3.
...Charging groove, 4.6...Molding plate,
5... Short side wall, 7... Guide mechanism, 8
...Advance/retreat operation mechanism, 9a, 9b...Inner partition short side wall, 10.12...Bolt, 11...
...Connector, 13...Molded plate, 14
...Tie bolt, 15...--Natsuto, 1
6... Hydraulic jack, 17... Molding space, 18... Water supply pipe, 19... Drain pipe, 20... Hanging fittings, 21... Tower-shaped pedestal, 22... Belleville spring, 23... Inclined surface.

Claims (1)

[Claims] 1. In a twin casting mold in which a pair of short side walls and a medium partition short side wall are sandwiched between opposing long side walls, the medium partition short side wall is made wider than the short side wall, and the medium partition short side wall is made wider than the short side wall. Both sides of the side walls are fitted to opposing surfaces of the long side walls through charging grooves, and supported by drop stops provided inside the charging grooves, and one side of the short side wall of the medium partition is a continuous casting mold that is fixed to the long side wall.