JPH072898U - Setter brick for roller hearth kiln - Google Patents

Abstract

(57) [Summary] [Construction] The present invention forms a convex or concave shape on the use surface of a setter brick for roller hearth kiln, and the height of the convex or concave shape is 0.5-3 mm, width or large. It is a setter brick for roller hearth kilns having irregularities on the use surface, characterized in that the dimension is 5 mm or less and the interval between these shapes is 5 to 50 mm. [Effect] With the above technical configuration, the temperature distribution of the setter bricks is made uniform, strains due to thermal stress are alleviated, heat diffusion on the surface of the setter bricks is facilitated, and partial temperature differences are eliminated. , It prevents damage to setter bricks and improves productivity.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a setter brick for a roller hearth kiln.

[0002]

[Prior art]

 When firing tiles, ceramics, etc. using a roller hearth kiln, generally, the products to be fired are loaded on setter bricks (shelf made of refractory) and continuously fed into the kiln for firing. Ordinarily, the setter brick is usually in the form of a flat plate having a thickness of 10 to 15 mm, and the surface to be used is coated with mullite, alumina, etc., and the article to be fired is placed directly on it and fired.

[0003]

[Problems to be solved by the device]

 As is well known, the firing process in the roller hearth kiln is intended to achieve high productivity by rapid heating and cooling, but a large amount of thermal stress is generated due to rapid heating and cooling, which causes strain. When the setter bricks are severely damaged, especially when large and thick tiles are piled up flat when firing the tiles, the temperature distribution in the unit setter bricks during temperature rise and decrease shows a large temperature difference depending on the part of the setter bricks. Occur. Immediately, the temperature rise rate is slow in the area where the tile to be fired directly contacts due to the effect of the placed tile, but the rate of temperature increase and decrease in the area that is not in contact with the tile depends on the operating conditions of the roller hearth kiln. It is known that the setter bricks are damaged and destroyed due to strain caused by the generation of thermal stress due to such partial temperature difference.

[0004]

[Means for Solving the Problems]

 The inventors of the present invention succeeded in solving various defects of these conventional methods as a result of various studies and experiments in order to solve various problems of the conventional methods, and the technical configuration of the present invention is as follows. The setter brick for roller hearth kiln is formed with a convex shape or a concave shape on the use surface, and the height of the convex or concave shape is 0.5-3 mm, the width or size is 5 mm or less, and the interval between these shapes. It is a setter brick for roller hearth kilns with unevenness on the use surface, characterized by a diameter of 5 to 50 mm. With such a simple technical configuration, the temperature distribution of the setter brick is made uniform. The strain generated by thermal stress is mitigated, heat diffusion on the surface of the setter brick is facilitated, partial temperature difference is eliminated, damage to the setter brick is prevented, and productivity is improved.

A detailed description will be given with reference to the accompanying drawings showing a specific example of the present invention.

FIG. 1 is a cross-sectional view (II line in FIG. 2) of an example in which the protrusions 1 are arranged on the upper surface (use surface) of the setter brick 10 of the present invention, and FIG. 2 is a plan view of FIG. In this example, the ridges 1 are arranged at right angles to the traveling direction when the setter brick is used, but the ridges may be provided in parallel to the traveling direction when the setter brick is used, and these ridges 1 are crossed. Although they may be arranged diagonally, it is more desirable to arrange them so as not to obstruct the gas flow in the recesses of the ridges when they intersect (providing a partial notch in the ridges, etc.). .

FIG. 3 is a plan view showing an example in which button-shaped or dot-shaped protrusions 2 are arranged on a use surface of a setter brick. When the protrusions of FIG. 1 are protrusions 2, I- of FIG. The line I is the sectional view of FIG.

The protrusions 2 in FIG. 3 are frustoconical, but may be frustoconical (square or polygonal: FIG. 4) or arcuate in cross section (FIG. 5), and their arrangement is not parallel but zigzag. Other arrays may be used.

The size and spacing of the concave or convex ridges or protrusions need to take into consideration the influence on warpage, deformation, etc. during the manufacturing of the setter brick and the product to be fired, and strain due to thermal stress. As a result of the experiment, it is preferable that the height of the protrusion and the protrusion is 3 mm or less, the width or size is 5 mm or less, and the arrangement interval between them is within the range of 5 to 50 mm. Admitted.

[0010]

EFFECTS OF THE INVENTION (1) The area of contact of the product to be fired with the surface where the setter brick is used is reduced, the temperature distribution of the setter brick is made uniform, and the occurrence of strain due to thermal stress is mitigated.

(2) The partial temperature difference of the setter brick is eliminated.

(3) The occurrence of defective products due to so-called "same" of the product to be fired is reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a setter brick of the present invention,

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view of another example of the present invention in which the convex shape is button-shaped or dot-shaped,

FIG. 4 is a plan view of another example of the present invention in which the convex shape is a truncated pyramid;

FIG. 5 is a sectional view showing another example of the present invention in which the convex shape is an arc shape;

[Explanation of symbols]

 1 Projection 2 Projection 10 Setter brick main body

Claims (2)

[Scope of utility model registration request] 1. A setter brick for a roller hearth kiln is formed with a convex shape or a concave shape on a use surface, and the convex shape or the concave shape has a height of 0.5-3 mm and a width or a size of 5 mm or less,
Further, a setter brick for a roller hearth kiln having a concavity and convexity on the use surface, characterized in that the intervals between these shapes are 5 to 50 mm. 2. The setter brick for a roller hearth kiln according to claim 1, wherein the convex or concave shape is a striped shape, a grid pattern or a zigzag shape.