JPS5922923Y2 - A ladle made of ceramic fiber molded body with a lid to prevent slag outflow - Google Patents

Description

[Detailed description of the invention] The present invention relates to a ladle made of a ceramic fiber molded body having a slag outflow prevention lid, and more specifically, a metal net or metal plate is inserted into the inside of the molded body mainly composed of ceramic fibers for reinforcement. A ladle made of a ceramic fiber molded body having a slag outflow prevention lid which is attached to the top surface of the ceramic fiber molded body, which substantially corresponds to the shape of the opening of the ladle body and has a number of weirs projecting downward. Regarding.

Conventional non-ferrous metal die-casting products are made by melting an ingot in a master furnace such as a reverberatory furnace, receiving the molten metal in a ladle, etc., and then moving it to a hand furnace, where the required amount of molten metal in the hand furnace is used to make cast iron or It was obtained by scooping it with a ladle made of ceramic fiber moldings and injecting it into a die-casting machine.

This molten non-ferrous metal contains a lot of impurities such as cracks from refractory bricks, castables, etc. and slag, and if the molten metal is used as is and is injected into a die casting machine, the die cast product yield will decrease. It was something to do.

Attempts were made to filter impurities in the molten metal using a cast iron ladle with a wire mesh, but due to the material, the molten metal temperature was 60-100%.
The current situation was that the fluidity of the molten metal deteriorated due to the decrease in C, the workability etc. decreased as a result, and the wire gauze suffered from severe wear and tear, so that it was hardly used.

The inventors of the present invention previously proposed a metal-reinforced ceramic fiber molded body that improved the heat retention performance, weight reduction, and mechanical strength of a molten metal holding container in Utility Application No. 51-9788. By extending a fixing plate to one side of the ladle body and attaching a filter with many through holes to the edge of the fixing plate, the force of refractory bricks and castables mixed in the molten non-ferrous metal can be reduced. We are proposing a filter-equipped ladle made of a ceramic fiber molded body that filters impurities such as debris and slag and improves the yield of die-cast products.

However, as the number of times the molten metal transferred to the local furnace is injected into the die-casting machine using the ladle increases, slag and non-ferrous metal oxide films floating on the surface of the molten metal are formed on the filter of the ladle. It enters the ladle through the through hole, and is then rolled into the mold from the feeder section of the die-casting machine through the runner, which reduces the product yield.

The present invention proposes a ladle made of a ceramic fiber molded body having a slag flow prevention lid that prevents the slag and nonferrous metal oxide film floating on the surface of the molten metal from being efficiently injected into the mold.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a perspective view of a ladle made of a metal-reinforced ceramic fiber molded body in the prior art, and FIG.
A longitudinal sectional view showing a state in which a slag outflow prevention lid is attached to the ladle shown in the figure, and FIGS. 3, 5, and 7 are plan views showing a state in which a weir is provided under the slag outflow prevention lid. FIG. 4, FIG. 6, and FIG. 8 show the corresponding AA cross-sectional views.

In this drawing, 1 is a ladle body made of a ceramic fiber molded body, 2 is a slag outflow prevention lid, 3 is a weir of various shapes protruding from 2, 4 is a molten metal measuring line, 5 is injection [-1, 6 are reinforcement] 7 indicates a hinge.

Here, the molded product mainly composed of ceramic fibers refers to relatively high heat-resistant inorganic fibers such as silicic acid fibers, alumina fibers, silicic acid, alumina fibers, and zirconia fibers, as well as alumina sol, sica sol, It is made by kneading an inorganic or organic binder such as CMC, alginate, etc., and a fixing agent such as sulfuric acid or acrylamide with water, forming it into a desired shape, and drying it.

The above molding method can employ a vacuum suction type or a press method. Furthermore, if a metal reinforcing material 6 such as a wire mesh or punched metal is placed in a mold and molded, the metal reinforcing material can be inserted into the ceramic fiber molded body. A ladle body 1 made of a ceramic fiber molded body can be obtained.

The material of the slag outflow prevention lid of the present invention is a ceramic fiber molded body, which is optimal in terms of heat resistance and specific gravity, as it can withstand the temperature of the non-ferrous metal molten metal and for the purpose of removing slag floating on the surface of the molten metal. Similarly, it is preferable because it can be molded with a mold.

Furthermore, by positioning the slag outflow prevention lid made of this ceramic fiber molded body on the molten metal measuring line of the ladle body, the heat-resistant ceramic can be freely rotated either on the molten metal measuring line side of the ladle body or near the injection line. Alternatively, it is preferable to fix it with a hinge 7 made of stainless steel.

In addition, the slag outflow prevention lid is provided with a number of weirs facing downward to prevent the outflow of slag, and its shape is such that it is easy to prevent the outflow of slag or nonferrous metal oxide film floating on the molten metal surface -L. The shapes shown in FIGS. 3 to 8 are particularly preferred.

However, the weir shape of the present invention is not limited to this shape.

- A ladle made of a ceramic fiber molded body having a slag outflow prevention lid of the present invention configured as described above is pushed into a hand furnace that holds molten nonferrous metal, the molten metal is scooped into the ladle body, and the molten metal is measured with a measuring line; When pouring into a die-casting machine through the injection port 5, the slag outflow prevention lid is lowered as the amount of molten metal in the ladle body decreases, and the slag can be dammed up with a dam.

That is, as is generally known in a die casting machine, the slag is cast from the feeder section through the runner into the mold, but at this time, the slag flow prevention lid of the present invention is installed to prevent the slag from flowing out slower than the molten metal. This allows the slag to remain in the riser portion without being thrown into the mold together with the molten metal.

In this way, if the ladle with the slag outflow prevention lid of the present invention is used together with a ladle with a filter that can filter out impurities such as pieces of refractory bricks and castables mixed in the molten metal, it will be possible to further prevent impurities from entering the mold. ), the product yield is improved.

Furthermore, since the slag outflow prevention lid is provided on the first side of the ladle body, the amount of heat dissipated from the molten metal is reduced, thereby preventing a drop in the molten metal temperature, and therefore no deterioration in workability is observed.

Using the ladle A having the slag outflow prevention lid of the present invention constructed in this way, the conventional ladle B and the ladle C using a filter-equipped ladle together, 90σC molten aluminum was cast using a die-casting machine to reduce the defective rate and the molten metal. The table below shows the results of a test comparison of temperature reduction, etc.

As is clear from the above explanation, the ladle made of a ceramic fiber molded body with a slag outflow prevention lid of the present invention greatly improves the yield of die casting I products, and furthermore, it can be used in combination with a ladle with a filter. As a result, the effects are synergistically improved, workability is improved because the molten metal temperature does not drop, and the molten metal temperature is not raised more than necessary in anticipation of the drop in molten metal temperature, contributing to energy savings. It is extremely useful for industry.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a ladle in the prior art;
Fig. 2 is a longitudinal cross-sectional view showing the state in which the slag outflow prevention lid is attached to the ladle body of the present invention, and Figs. 3, 5, and 7 show the state in which a weir is provided under the slag outflow prevention lid. A plan view showing,
FIG. 4, FIG. 6, and FIG. 8 each show a corresponding AA cross-sectional view. Here, 1 is a ladle body made of a ceramic fiber molded body, 2 is a slag outflow prevention lid, 3 is a weir of various shapes protruding from the bottom surface of 2, 4 is a molten metal measuring line, 5 is an injection port, and 6 is metal reinforcement. 7 indicates the hinge.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ Ceramic fiber molded product which is reinforced by inserting a metal net or metal plate into the inside of the molded product whose main component is ceramic fiber. A ladle made of a ceramic fiber molded body and equipped with a slag outflow prevention lid with a lid made of a number of weirs projecting downward. 2. A ladle made of a ceramic fiber molded body having a slag flow prevention lid as claimed in claim 1 of the registered utility model, characterized in that the slag flow prevention lid is made of a ceramic fiber molded body.