JPH067918A - Manufacture of molten metal trough - Google Patents

Abstract

PURPOSE:To easily manufacture a high precise trough having high durbility by integrally forming the trough body having U-shaped cross section with ceramic and coating heat insulating exterior at the outer side. CONSTITUTION:The trough body 1 having U-shaped cross section is formed of the ceramic. This trough body 1 is manufactured by setting a core into an outer mold manufactured by the preset shape dimension and filling the water- kneaded ceramic into gap part between the outer mold and the core and removing the mold after solidifying. After heating and drying the formed trough body 1, the ceramic paper 2 is stuck to the outside wall of the trough body 1 and a heat insulating plate 3 (ceramic fiber-made) is set to this outer side. By filling the dry powder into gap between the ceramic paper 2 and the heat insulating plate 3, a buffering layer 4 is formed, and after sticking the ceramic paper 5 at the outside of the heat insulating plate 3, by sticking the exterior plate 6 at the outer side, the trough product 7 is completed. By this method, the highly precise trough having uniform quality and the prescribed property can easily be manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a molten metal gutter which is used when a molten metal is sent.

[0002]

2. Description of the Related Art Conventionally, a molten metal gutter used for sending a molten metal from one side to another has been constructed by refractory bricks in a gutter shape.

[0003]

According to the above-mentioned conventional method, in order to construct a small piece of refractory brick in a gutter shape, not only a skilled and advanced technique is required, but also brick and brick are connected. Since the joint material used has low fire resistance and the joint portion is damaged first during long-term use, there is a problem that the entire service life is significantly shortened (for example, about 1 to 6 months).

Further, since the molten metal is caused to flow in a gradient, there is a problem that a highly skilled technique is required in order to increase the gradient accuracy by manually constructing it.

In addition, when the refractory brick and the joint filler are worn out, it takes a lot of time to replace them with new ones, and there is a problem that working conditions are deteriorated due to generation of dust during the work. It was

[0006]

According to the present invention, however, the above-mentioned conventional problems are solved because a gutter having a U-shaped cross section is integrally formed of ceramics and a heat insulating exterior is attached to the outside thereof.

That is, the present invention is a method for producing a molten metal gutter, characterized in that a gutter having a U-shaped cross section is integrally formed of ceramics, and a heat insulating outer cover is attached to the outside thereof. Still another invention is to integrally form a gutter body having a U-shaped cross-section with ceramics, dry it, attach ceramics paper to the outside thereof, and layer an insulating plate on the outside via inorganic powder, A method for manufacturing a molten metal gutter, characterized in that a ceramic paper is adhered to the outside of a heat insulating plate and an exterior iron plate is attached. Next, the inorganic powder used in the present invention is, for example, an amorphous refractory material called a castable. The heat insulating plate in the above is a plate body made of ceramic fiber.

To connect the gutters of the present invention, ceramic paper is abutted on the abutting end faces, and a ceramic adhesive is applied to the abutting faces to affix them to each other. Fixed.

[0009]

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

A gutter body 1 having a U-shaped cross section is formed of ceramics. In this gutter body 1, a core is set in an outer mold manufactured according to a predetermined shape and dimension, and a gap is formed between the outer mold and the core.
By a normal molding method in which water-mixed ceramics are filled, solidified and then demolded.

The gutter body 1 molded as described above is heated to 350
After drying at 30 ° C to 400 ° C for 30 to 36 hours, the ceramic paper 2 is attached to the outer wall of the gutter body 1, and the outside thereof is
A heat insulating plate 3 (made of ceramics fiber) is set with a predetermined gap, dry powder is filled between the ceramic paper 2 and the heat insulating plate 3 to form a buffer layer 4, and the ceramic paper is placed outside the heat insulating plate 3. After the spout 5 is attached, the outer steel plate 6 is attached to the outer side of the spout 5 to complete the gutter product 7. In the above description, since the exterior iron plate 6 is installed on the horizontal plane, it is necessarily formed without a gradient. On the other hand, since the gutter body 1 is provided with a predetermined gradient (both in depth and width), the thickness is adjusted by the buffer layer 4 and the heat insulating plate 3, and the gap between the outer wall of the gutter body 1 and the iron plate is adjusted. Close up.

According to the above, the forming accuracy of the gutter body can be made sufficiently high (especially for the gradient), so that the gutter product 7 having a predetermined dimensional accuracy can be obtained.

[0013]

That is, according to the present invention, since the gutter body is integrally formed of ceramics, there is an effect that a highly accurate gutter having a large durability can be easily manufactured without requiring a high level of skill and skill. However, the gutter product according to the present invention is homogenous and has a predetermined performance, and the performance of the entire gutter is not deteriorated even if the partial replacement is performed if necessary, so that it is compatible. Also, if dry powder or ceramic fiber is filled in the gap between the integrally molded product and the heat insulating plate, it can be easily removed.
Part replacement is easy and reliable.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a gutter manufactured according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a right side view of the same.

FIG. 4 is a left side view of the same.

FIG. 5 is a perspective view of the gutter body.

FIG. 6 is a partial plan view of the connecting portion.

[Explanation of symbols] 1 gutter 2 ceramics paper 3, 5 heat insulating plate 4 buffer layer 6 exterior iron plate 7 product gutter

Claims (4)

[Claims] 1. A method for manufacturing a molten metal gutter, characterized in that a gutter having a U-shaped cross section is integrally formed of ceramics, and a heat insulating exterior is attached to the outside thereof. 2. A gutter body having a U-shaped cross section is integrally formed of ceramics, dried, and then a ceramic paper is attached to the outer side thereof, and a heat insulating plate is layered on the outer side thereof through an inorganic powder for heat insulation. A method for producing a molten metal gutter, characterized in that a paper is adhered to the ceramics outside the plate and an exterior iron plate is attached. 3. The method for producing a molten metal gutter according to claim 1, wherein the inorganic powder is ceramics (amorphous refractory material). 4. The method for producing a molten metal gutter according to claim 1, wherein the heat insulating plate is a plate made of ceramic fiber.