JPS59169651A - Heated casting mold type continuous casting device having guide mold - Google Patents

Abstract

PURPOSE:To obtain continuously a metallic molding having a smooth and beautiful surface by providing a hollow guide mold for preventing oscillation of a casting ingot in the outlet of a heated casting mold. CONSTITUTION:A heated casting mold 1 contains a heating element 2 therein and the inside wall surface thereof is heated to the solidifying temp. of a molten metal 3 or above. The front end of a casting ingot 4 is cooled by a coolant such as water or air supplied from the spray of a cooler 5 so as to solidify in the mold 1 and is drawn out while the drawing speed is controlled by pinch rolls 6 for driving. Guide molds 7 for preventing the oscillation of the ingot 4 in the outlet of the casting mold are provided so that the cast ingot having a smooth and beautiful surface is continuously obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on Japanese Patent No. 1049146 for continuously obtaining a metal molded body with a smooth and beautiful surface using a heating mold.
The present invention relates to an apparatus for carrying out the continuous metal casting method of No. 1, characterized in that a hollow guide mold is provided at the exit of the heating mold to prevent vibration of the ingot.

When performing the continuous metal casting method of Japanese Patent No. 1049146, a heated mold is simply used without a guide mold, and the temperature of the inner wall surface of the mold outlet is maintained at a temperature higher than the solidification temperature of the molten metal for casting. When pulling out an ingot, the surface of the ingot solidifies just outside the exit of the mold, but when the ingot vibrates, the thin wires on the surface of the ingot solidify when they come into contact with the coolant. These vibrations make it extremely difficult to obtain plates and wires of uniform thickness and diameter.

The present invention is to completely prevent such floating of the ingot at the exit of the heating mold and to continuously obtain an ingot with a smooth and beautiful surface. A guide mold having a hollow cross section is provided, and the guide mold makes it possible to draw the ingot from the heating mold without being affected by vibrations.

The hollow guide mold is a refractory type with a mirror-finished inner wall, or a soft material such as graphite or boron nitride, to prevent scratches on the ingot surface due to friction when the ingot is pulled out. , worn out by friction when pulling out the ingot,
It is preferable to use one that does not cause scratches on the surface of the ingot. If a hard figure having a rough inner wall is used as a guide mold, scratches will occur in the ingot.

Of course, the guide mold can be made of a different material from the heating mold, connected to the heating mold, and replaced with a new guide mold as necessary, but it is possible to maintain the guide mold at a temperature higher than the solidification temperature of the molten metal, Heating the mold so that only the outlet end of the heating mold, which is characterized by preventing solidification of the surface layer of the ingot on its inner wall surface, is below the solidification temperature of the molten metal. Accordingly, it is possible to configure the outlet end of the addition 1 to form a guide mold.

The hollow guide type has an inner wall surface that is below the solidification temperature of the molten metal.
and to prevent the risk of crystal nucleation on its inner wall surface.
It is desirable that the temperature be maintained at a temperature higher than that of the ingot dummy and the ingot.

Embodiments of the invention will now be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional front view of essential parts showing one embodiment of a large-scale downward continuous casting apparatus according to the present invention.

(2) is a heating mold with a built-in heating element (2) whose inner wall surface is heated to a temperature higher than the solidification temperature of the molten metal (2). ■ is an ingot and the tip of the ingot is heated to solidify inside the mold ■ is a cooling device ■
It is cooled by a coolant such as water or air supplied from a sprayer, and is drawn out while controlling the drawing speed by a driving pinch roll. (2) is a guide mold to prevent vibration of the ingot at the exit of the mold. Can be installed as a guide type ■.

FIG. 2 is a vertical cross-sectional front view of the main parts of the apparatus, showing an example in which the present invention is applied to a horizontal continuous casting apparatus. The mold (2) is a heating type and has a built-in heating element, and the inner wall surface of the mold (2) is heated to a temperature higher than the solidification temperature of the molten metal (0). The cooling and withdrawal speed of the ingot (2) and the temperature of the mold and molten metal must be controlled so that the solidified interface of the ingot (2) always exists within the heated mold (2). [Phase] is an ingot cooling device in which water or air is ejected from a spray. 6 is a pinch roll for pulling out the ingot, and ◎ is a hollow guide type for preventing vibration at the zero exit end of the mold.

FIG. 3 is a longitudinal sectional front view of the main part of the apparatus when the present invention is applied to upward continuous casting. ■ is a mold with a built-in heating element O, the lower half of which is immersed in the molten metal ◎, and the inner wall surface of the mold 0 below the molten metal surface is kept at a temperature higher than the solidification temperature of the molten metal O by the heat of the molten metal [phase]. There is.

When the temperature of the molten metal (c) is not sufficient to heat the inner wall of the molten metal immersion part of the mold O to a temperature higher than the solidification temperature of the molten metal,
It can be heated by supplying current to the built-in heating element ◎. The upper outlet end of mold 0 above the molten metal surface constitutes a guide mold for the ingot. The temperature of the molten metal [phase], the supply amount of coolant such as water or air in the cooling device [phase], and the pinch roll for lifting the ingot are adjusted so that the tip of the ingot ■ solidifies below the surface of the molten metal holding furnace. By controlling the rotational speed of the ingot [phase], a smooth and beautiful ingot can be obtained without uneven patterns on the casting surface that occur due to the vibration of the ingot [phase] at the exit end of the heating mold (2). [Phase] is a shielding plate.

Not only can it be used as products such as plates, rods, and tubes, but it can also be used to cast products with complex cross-sections, such as gears and turbine blades, by continuous casting, and then cut into appropriate lengths. When making a product, it is extremely desirable to be able to use it directly as a product without surface finishing in terms of omitting the finishing process and saving energy, and the present invention provides continuous casting of such smooth and beautiful ingots. It is extremely useful for

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional front view of the main part of a large downward continuous casting apparatus showing one embodiment for obtaining rod-shaped metal according to the present invention, and Fig. 2 is a horizontal type showing another embodiment according to the present invention. FIG. 3 is a longitudinal sectional front view of an essential part of a continuous casting apparatus, and FIG. 3 is a longitudinal sectional front view of an essential part of an apparatus in which the present invention is applied to upward continuous casting. ■0■ Heating mold ■@@ Heating element■ [Phase] [Phase]
Molten metal ■@[Phase] Ingot ■[Phase] 0 Cooling device ■[Phase] O Vinci roll ■ @[Phase] Guide mold
[Phase] Shielding plate patent applicant Atsushi Ohno Representative Director O/-C Co., Ltd.

Claims (1)

[Claims] 11 Ingot heating mold type continuous casting equipment characterized by supplying molten metal from one end and continuously casting ingots from the other end.