JPH0321804Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for producing cast-rolled strips of a predetermined width, such as a belt shape or a rod shape, from a molten metal such as lead or a lead alloy.

Conventionally, this type of equipment has two rollers arranged above and below each other with a gap passage a for cooling rolling, as shown in FIGS. 1 and 2.
A channel-shaped molten metal supply nozzle D of a predetermined width having a tip abutment surface d of an arcuate concave surface that matches the shape of these circumferential surfaces is attached to the circumferential surface of one side of the pair of cooling rolling rolls b, b. These rolls b,
The solidified material is sent between rollers b and b, and is cooled and solidified on the surfaces of rolls b and b, and the solidified material is rolled to continuously produce a strip of a predetermined thickness. Undesirably, the molten metal tends to leak laterally until it solidifies in the passageway a, and the resulting strip is undesirably obtained with chips on both edges. The present invention provides a continuous casting and rolling apparatus that can eliminate such drawbacks, prevent leakage of molten metal, and obtain good formed strips with no defects on both side edges of a predetermined width. In a continuous casting and rolling apparatus equipped with a pair of cooling rolling rolls arranged one above the other with a gap passage, and a molten metal supply nozzle whose tip end is in contact with the pair of cooling rolls, the tip of the molten metal supply nozzle is provided with: Extended side walls are provided which close both sides of the cooling rolling gap passage extending to the end of the small rolling gap and abut against both sides of each roll.

An example of the embodiment of the present invention shown in FIGS. 3 to 5 is shown, and 1 and 1 indicate a pair of cooling rolling rolls disposed one above the other with a gap passage 2 for cooling rolling. Each roll 1 has the same axial width H as before, but
The middle part is formed into an intermediate large diameter part 1a having a width h corresponding to a predetermined cooling solidification rolling forming, and small diameter parts 1b on both sides thereof which are significantly smaller than this, and thus the small diameter parts of the opposing rolls 1, 1. Gaps 5, 5 were formed between 1b and 1b, into which a pair of extended side walls 4, 4 having a predetermined width provided at the tip of a molten metal supply nozzle 3, which will be described later, could be inserted. The molten metal supply nozzle 3 has a channel shape with a U-shaped cross section, for example,
The end surface 3b of the bottom wall 3a at the tip end of the lower roll 1
It is formed into an arcuate concave surface having the same shape as the peripheral surface 1d for abutting on the circumferential surface 1d, and both side walls 3c, 3c have extended side walls 4, 4, which will be described in detail below, at their tips. That is, the extended side walls 4, 4 on both sides are
has a width d substantially the same as the large diameter portion 1a of the roll 1 therebetween, and extends into the spaces 5, 5 between the small diameter portions 1b, 1b on each side of the front rolls 1, 1, respectively;
It closes both sides of the cooling rolling gap passage 2 that extends to the end of the small rolling gap between the rolls 1, 1, straddles it, and comes into contact with both side surfaces 1c, 1c of each roll 1 of the opposing rolls 1, 1. It was arranged like this. Reference numeral 6 indicates a non-porous heat insulating film that is adhered and coated on the upper surface of the bottom wall of the nozzle 2. The pair of opposing extended side walls 4, 4 are configured to extend integrally from both side walls 3c, 3c of the nozzle 3, or are separately made of metal and configured to be attached to both side walls 3c, 3c. You may.

According to the present invention, the molten metal supply nozzle 3 is placed on both sides of its tip, and the upper and lower rotating cooling rolls 1,
Since extension side walls 4, 4 are provided that close both sides of the cooling rolling gap passage 2 extending to the end of the small rolling gap of 1.0 mm and contact both sides of each roll 1, the supply flowing inside the nozzle 3 is The molten metal is discharged between the rolls 1, 1 from the tip thereof, and while it is being cooled and solidified through the cooling rolling passage 2, the molten metal does not leak out from both sides of the nozzle and the extended side walls 4, 4 This has the effect of producing a good rolled strip with a predetermined width d corresponding to the width d without causing defects on both side edges as in the conventional method. Furthermore, as is clear from the above, the small diameter portion 1b of each rolling roll 1 can be omitted, and in this case, it is possible to provide a continuous casting and rolling apparatus that does not take up as much width as the conventional one. have

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of the conventional device, Fig. 2 is a top view of the part excluding the upper roll, Fig. 3 is a side view of an example of the implementation of the present invention, and Fig. 4 is its front view. FIG. 5 shows a top view of the part with the upper roll removed. 1... Cooling rolling roll, 1c... Roll side surface,
2... Gap passage, 3... Molten metal supply nozzle, 4...
extension side wall.

Claims (1)

[Scope of utility model registration request] In a continuous casting and rolling apparatus equipped with a pair of cooling rolling rolls disposed one above the other and having a gap passage for cooling rolling, and a molten metal supply nozzle whose tip end is in contact with the pair of cooling rolling rolls, the tip of the molten metal supply nozzle is A continuous casting and rolling apparatus comprising an extended side wall which closes both sides of the cooling rolling gap passage extending to the end of a small rolling gap and comes into contact with both sides of each of these rolls.