JPH07243770A - Setter - Google Patents

Abstract

PURPOSE:To prevent the generation of cutout or breakage of attachment on the lower end of the end face of a setter due to contacting with transfer roller or setters each other by a method wherein the end face or the surface contacted with a transfer surface in the direction of advancement of the setter is provided with C-surface or R-surface. CONSTITUTION:C-surface or R-surface is provided on the end 3 of a surface contacted with at least a transfer surface at least in the advancing direction of a setter 1 while the thickness of the C-surface or the radius of curvature of the R-surface is determined so as to be larger than 10% and smaller than 50% of the thickness of the setter 1. When the setter 1 is transferred by rolling on transferring rollers 4, contact between the setter 1 and the transferring rollers 4 is effected by the surface of the C-surface or the R-surface of the end 3 of the setter 1 and the surface of the arc of the transferring rollers 14 whereby shock due to contact is mitigated, the breakage of the setter l can be prevented as much as possible and the life of the setter can be elongated.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention is easy to handle,
Regarding long-life setters.

[0002]

2. Description of the Related Art Conventionally, when firing is carried out while passing the article to be fired through a firing furnace such as a roller hearth kiln or a pusher furnace, the article to be fired is placed on a refractory setter and placed in a kiln. Have been moved and fired. The roller hearth kiln is designed to accelerate and shorten the firing time from the viewpoints of energy saving, productivity improvement, etc. Therefore, the setter for the kiln is capable of repeating heating, firing and cooling in a short time. It is required to have the property of withstanding the above-mentioned characteristics and to have excellent spalling resistance. In such a roller hearth kiln setter (hereinafter referred to as a RHK setter), no measures are taken to prevent the setter from meandering and to prevent the setter from climbing up. The end portion was not particularly processed.

[0003]

However, in the above-described conventional RHK setter, the lower end of the end face of the setter may be chipped due to contact with the transport roller or contact between the setters during use. , There was a problem of becoming rags. The present inventor has found that a C of a predetermined size is attached to the end of the end face of a setter for RHK or pusher furnace.
The present invention has been completed by finding that the conventional problems can be solved by providing the surface or the R surface.

[0004]

Means for Solving the Problems That is, according to the present invention, in the setter, in at least the traveling direction of the setter, at least an end of the surface in contact with the transport surface is provided with a C surface or an R surface. A setter is provided.
In the present invention, the thickness of the C surface or the radius of curvature of the R surface provided at the end of the setter end surface is preferably 10% or more and less than 50% of the setter thickness.

[0005]

In the present invention, the C surface or the R surface is provided at least in the traveling direction of the setter at least at the end of the surface in contact with the transport surface (for example, the surface in contact with the transport roller). In this way, since the C surface or the R surface is provided at the end of the end surface, in the case of RHK, for example, the contact between the setter and the transport roller occurs between the surfaces, so that the lower end portion of the setter is Can be prevented, and even if there is a deformed roller, the tip of the setter can be prevented from getting between the rollers, and the life of the setter can be extended.
Furthermore, since a uniform force is applied to the entire setter during molding of the setter, providing a C-face or R-face on the peripheral portion of the setter reduces the wall thickness of that portion, improves the density, and has the advantage of not causing battering. is there.

FIG. 1 (a) is an explanatory view when a C surface is provided at the end of the end surface of the setter of the present invention, and FIG. 1 (b) is provided with an R surface at the end of the end surface of the setter of the present invention. Illustration of the case,
FIG. 2 is an explanatory diagram showing contact between the end portion of the end surface of the setter and the transport roller. 1 to 2, the thickness a of the C surface or the radius of curvature r of the R surface is 1 of the thickness t of the setter 1.
It is preferably in the range of 0% or more and less than 50%, and 20
% Or more and less than 40% is more preferable, and 30% or more and less than 40% is particularly preferable. These values are 1 of t
If it is less than 0%, it is too small to provide the effect of providing the C-face or R-face, and if it exceeds 50%, chipping occurs at the ends, which is not preferable.

The setter 1 of the present invention is provided with a transport roller 4
When the sheet is rolled over and conveyed, the contact between the setter 1 and the conveying roller 4 is caused by the C surface or the R surface of the end 3 of the setter 1 and the arc of the conveying roller 4, as shown in FIG. Since it is performed by the surface, the impact due to contact is mitigated, damage to the setter 1 is prevented as much as possible, and the life can be extended. Further, as shown in FIG. 4, while the setter 1 is transporting on the transport roller 4, the end surface 2 of the setter 1 and the end surface 2 ′ of the setter 1 ′ come into contact with each other. Since they make contact, they are extremely unlikely to be damaged by the impact of contact.

[0008]

EXAMPLES Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples. (Example) Using a mullite and / or cordierite-based aggregate raw material and a binder, a setter of 450 mm × 450 mm × 10 (thickness) mm is prepared by mixing, molding, and then firing, and is used for transportation. The thickness of the C surface or the radius of curvature of the R surface provided at the end of the end surface that contacts the roller is changed, and the kiln is run at 1320 ° C for 1.5 hours at the roller hearth kiln, and the setter end at that time Was observed, and the number of kilns in which tattering occurred and the number of kilns in which the setter life was reached were measured. The results are shown in Table 1.

[0009]

[Table 1]

As is clear from the results shown in Table 1, when the C surface or the R surface is not provided at the end portion of the end surface of the setter which is in contact with the conveying roller, chipping occurs, and the end portion of the setter end surface is generated. It has been found that the chipping is likely to occur even when the thickness of the C surface or the radius of curvature of the R surface provided in is not less than 10% and less than 50% of the setter thickness.

[0011]

As described above, according to the setter of the present invention, since the C surface or the R surface having a predetermined size is provided at the end of the setter end surface, the article to be fired is placed on the setter during transportation. , Contact between the setter and the transportation rollers,
Or, the setters are hardly damaged by the impact of contact with each other, the life of the setters can be extended, and the setters can be safely conveyed without getting on a conveying surface such as a conveying roller. .

[Brief description of drawings]

FIG. 1 is an explanatory view of a case where a C surface is provided at an end of an end surface of a setter of the present invention (a) and a case where an R surface is provided (b).

FIG. 2 is an explanatory diagram showing contact between an end portion of an end surface of a setter and a transport roller.

FIG. 3 is an explanatory diagram of the present invention during setter conveyance.

FIG. 4 is an explanatory diagram showing contact between setters.

[Explanation of symbols]

1 setter, 2 setter end face, 3 end part, 4 transport roller.

Claims (2)

[Claims] 1. A setter, wherein a C surface or an R surface is provided at least at an end of a surface in contact with a transport surface in at least a traveling direction of the setter. 2. The setter according to claim 1, wherein the thickness of the C surface or the radius of curvature of the R surface is 10% or more and less than 50% of the thickness of the setter.