JPH0615439A - Production of molten metal vessel - Google Patents

Abstract

PURPOSE:To obtain a molten metal vessel, in which the fire resisting characteristics is not lowered and the uniform products can be mass-produced, by integrally forming a ceramic inner vessel, sticking a heat insulating layer through a separating layer at the outside thereof and fitting a reinforced exterior at the most outside. CONSTITUTION:By filling material kneading the ceramic powder with water into gap between a core and an outer mold, the ceramic inner vessel 3 is formed. A ceramic paper 4 is stuck to the whole surface of the outside wall thereof. The heat insulating plate 5 is arranged in the condition of leaving a prescribed interval to the outside wall and the separating layer 6 composed of inorganic particles or inorganic fibers is stuck between the heat insulating plate 5 and the ceramic paper 4 and an iron plate 7 is attached to the outside of the heat insulating plate 5 and further, the exterior iron plate 9 is coated through a spacer 8. By this method, no fear to lower the fire resisting characteristics in the joint parts is generated, and bad influence caused by thermal expansion is not developed because of the separating layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a metal melt tank, which has a large durability and is easy to convert.

[0002]

2. Description of the Related Art Conventionally, all interiors of a molten metal holding furnace, a low-pressure casting furnace, a sorting tank, etc. have been constructed by stacking refractory bricks.

[0003]

The above-mentioned conventional holding furnace, etc.
All of them were constructed by stacking refractory bricks, so not only does it require skill, but it also takes a long time to construct and the joint's fire resistance is small, so it is easily damaged during continuous use for a long time, and as a whole There was a problem of poor durability.

However, since it is heated to a high temperature, there is a problem that thermal expansion causes an excessive force between the inner tank and the outer casing, which may cause damage. Further, when the inner tank is damaged, it takes a lot of time and labor to replace the inner tank, and dust is generated, which causes a problem in hygiene.

[0005]

SUMMARY OF THE INVENTION However, the present invention has solved the above-mentioned conventional problems by integrally molding the inner tank and by interposing a heat insulating plate and a separation layer between the inner tank and the holding exterior. .

That is, according to the present invention, a ceramics inner tank is integrally molded into a predetermined shape, dried, and then a heat insulating layer is layered on the outer side of the inner layer via a separation layer, and a reinforcing exterior is mounted on the outer side. It is a characteristic method for producing a molten metal tank, wherein the separation layer is formed by filling inorganic particles or inorganic short fibers. Still another aspect of the present invention is to integrally mold a ceramic inner tank into a predetermined shape, and after drying the ceramic inner tank, a ceramic paper is attached to the outer side of the ceramic inner tank, and a separation layer filled with powder is provided on the outer side thereof. A method for producing a molten metal tank, comprising a heat insulating plate layered on the outer side of the separation layer, an iron plate layered on the outer side of the heat insulating plate, and an outer plate being attached to the outer side of the iron plate via a gap. After integrally molding the ceramic inner tank into a predetermined shape and drying the same, a heater is attached to the outer wall and the outer bottom wall of the ceramic inner tank, and a heat insulating wall is layered on the outer side of the inner wall of the ceramic inner tank. A method of manufacturing a metal melt tank is characterized in that a partition plate having a built-in heater is horizontally provided in the center of the tank, and a ceiling lid with a heater is capped on the upper part of the inner tank.

The above-mentioned ceramics forming the inner tank wall can be molded into any desired shape because, for example, ceramic powder is kneaded with water and the mixture is put between the core and the outer mold. Further, the drying is performed, for example, at 350 ° C. to 400 ° C. for 30 to 40 hours.

The above-mentioned inorganic powder is, for example, an amorphous refractory, and the inorganic fiber is a ceramic fiber.

The above-mentioned inorganic powder and the inorganic fiber are mixed at a fixed rate (for example, 1: 1) and filled in a usual manner.

The heat insulating plate described above is, for example, a plate member made of ceramics, and plates having an arbitrary thickness are stacked to have a predetermined thickness.

The separation layer can facilitate the replacement of the inner tank, prevent the generation of dust, and reduce the impact.

[0012]

Example 1 A ceramic inner tank 3 was formed by filling a material in which ceramic powder was kneaded into the gap between the core 1 and the outer mold 2 and was formed at 350 ° C. to 400 ° C. for 30 to 40 hours. Dry with ventilation. According to the above, when the ceramic is solidified, it is removed from the mold and inverted (the bottom is turned up), and then the ceramic paper 4 is attached to the entire outer wall. Then, the heat insulating plate 5 is installed with a predetermined gap from the outer wall.
And the ceramic paper 4 with a separation layer 6 made of inorganic particles or fibers, and the heat insulating plate 5
The iron plate 7 is attached to the outside of the, and the outer iron plate 9 is further attached via the spacer 8 (for example, a lattice shape).

In the above-mentioned embodiment, the inorganic particles or fibers have heat resistance, absorb the impact, and facilitate the exchange of the inner tank.

[0014]

Example 2 A filter furnace will be described with reference to FIGS.

After drying the furnace body 10 integrally formed of ceramics, a ceramics paper 12 is attached to the outside thereof, a separation layer 11 is laminated on the outside thereof, and a heat insulating plate 13 is attached to the bottom and one side of the outside. Layering is performed, and the exterior iron plate 14 is attached to the outside of the heat insulating plate 13. The heat insulating plate 13 is not layered on the outside of the outlet 15. Reference numeral 16 in the drawing denotes a partition wall provided on one side in the furnace body 10 to the outlet side. The partition wall 16
Has a separation layer 11 in the center.

[0016]

Third Embodiment Next, a low pressure casting furnace will be described with reference to FIGS.

Furnace body 1 integrally formed of ceramics
After drying 7, the ceramic paper 18
, The separation layer 19 is provided on the outer side thereof, the heat insulating plate 20 is attached on the outer side thereof, the iron plate 21 is attached to the outer side of the heat insulating plate 20, and the outer iron plate 23 is attached to the outer side of the iron plate 21 via the spacer 22. Put on.

In the figure, reference numeral 24 denotes a cylindrical body which is provided laterally below the inner side of the furnace body 17.

[0019]

Fourth Embodiment A holding furnace will be described with reference to FIGS.

Furnace body 2 integrally formed of ceramics
5, a heater 26 is attached to a proper place on the outer side wall of the inner wall 5, ceramics paper 27 is attached to the outer side thereof, and the separation layer 3 is attached to the outer side thereof.
3 is provided, and the heat insulating plate 34 is attached to the outside of the heat insulating plate 34.
The iron plate 35 is attached to the outer side of, and the outer iron plate 32 is attached to the outer side of the iron plate 35 via the spacer 36.

The upper part of the furnace body 25 is covered with a ceiling lid 29 integrally formed of ceramics with a heater 28 attached to the lower surface thereof to form a holding furnace. Reference numeral 30 in the drawing is a partition wall in which a heater 31 is installed.

[0022]

According to the present invention, since the inner tank (furnace body) is formed by integrally molding ceramics, there is no so-called seam, and there is no fear that the fire resistance caused by the seam is deteriorated. Further, since the molding can be performed by filling the gap between the outer mold and the core with the ceramics kneaded material, without requiring skill,
This has the effect of mass-producing homogeneous products. Further, since the heat insulating plate is adhered via the separation layer, there are various effects such that the outer layer is not adversely affected by the thermal expansion of the furnace body (inner tank). Also, since there is a separation layer, replacement of the inner tank is extremely easy.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a relationship between a core used for forming an inner tank of the present invention and an outer mold.

FIG. 2 is a vertical sectional front view of a molten metal tank manufactured according to the present invention.

FIG. 3 is a plan view showing a part of the same.

FIG. 4 is a vertical sectional front view of the filter furnace.

5 is a sectional view taken along line AA in FIG.

FIG. 6 is a sectional view taken along line BB in FIG.

FIG. 7 is a sectional view taken along line CC in FIG.

FIG. 8 is a vertical sectional view of the low pressure casting furnace.

FIG. 9 is a plan view of the same with a partial cross section.

10 is a sectional view taken along line AA in FIG.

FIG. 11 is a vertical sectional view of the holding furnace.

FIG. 12 is a plan view of the same.

[Explanation of symbols]

 1 Core 2 Outer Type 3 Inner Tank 4 Ceramics Paper 5, 13, 20, 34 Heat Insulating Plate 6, 11, 19, 33 Separation Layer 7, 21, 35 Iron Plate 8 Spacer 9, 14, 23, 32 Exterior Iron Plate 10, 17 , 25 Furnace body 12, 18, 27 Ceramic paper 15 Outlet part 16 Partition wall 26, 28 Heater 27 Insulation wall 29 Ceiling lid

Claims (4)

[Claims] 1. A ceramics inner tank is integrally molded into a predetermined shape, dried, and then a heat insulating layer is laminated on the outside thereof with a separation layer interposed therebetween, and a reinforcing exterior is mounted on the outside thereof. Method for manufacturing molten metal bath. 2. The method for producing a molten metal tank according to claim 1, wherein the separation layer is formed by filling inorganic particles or inorganic short fibers. 3. A ceramics inner tank is integrally molded into a predetermined shape, dried, and then a ceramics paper is attached to the outside of the ceramics inner tank, and a separation layer filled with powder is provided on the outside thereof. Layer a heat insulating plate on the outside of the separation layer,
A method for producing a molten metal tank, comprising laminating an iron plate on the outer side of a heat insulating plate, and covering the outer side with an exterior plate via a gap. 4. A ceramics inner tank is integrally formed into a predetermined shape, dried, and then a heater is attached to the outer wall and the outer bottom wall of the ceramics inner tank, and a heat insulating wall is layered on the outer side thereof. A method for manufacturing a molten metal bath, wherein a partition plate having a built-in heater is horizontally provided in a central portion of the ceramic inner tank, and a ceiling lid with a heater is capped on the upper portion of the inner tank.