JPS60200083A - Floor plate for baking - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a firing base plate used to place a shaped object to be fired when firing ceramics or the like.

[Prior art]

A common method for manufacturing ceramics is to press-form a molded body into a predetermined shape and fire it in a high-temperature furnace. Conventionally, such firing was carried out by spreading a sheet of flour on the center l, placing the molded bodies 3, that is, the objects to be fired, on top of it, and firing the center l together, as shown in Figures 1 and 2. This was done by pumping water into the furnace.

The role of the dusting powder is to a) prevent fusion between the center 1 and the molded body 3, and b) improve slippage when the molded body undergoes sintering and shrinkage.

C) Ensuring a gas passage to facilitate decomposition and oxidation of the organic binder added to the molded body, d) Preventing molded bodies with curved bottom surfaces from rolling, etc. As described above, the lining powder has many functions, but its drawback is that the lining powder eats into the molded body, although this differs depending on the material of the molded body and the lining powder.

This biting requires a step to remove the powder from the molded body (fired body). Furthermore, the bite marks are hard to see and spoil the appearance, and in order to keep the appearance clean, it becomes necessary to spend a lot of man-hours such as polishing steps.

On the other hand, in recent years, the movement of industrial science, referred to as F'MS, has rapidly spread, and the introduction of robots for ceramic firing work has begun to be considered.

That is, the robot is used to perform tasks such as supplying objects to be fired to a tunnel-type firing furnace, which is a continuous operation device, and taking out fired objects after firing. In this case, the issues are: l) How to remove the dust that has been engulfed by the fired body, c) How to smooth the surface of the dust, and 3) The accuracy of the position of the fired product. In the case of conventional manual work, these issues, such as how to ensure safety, did not pose much of a problem, and these issues have emerged as major bottlenecks. Although these problems can be technically addressed by adopting the current state of the art as is, a large capital investment is required to solve the problem. especially,
y) Regarding lc, in the case of a molded product with a curved bottom surface, K
If you use bed powder, there is a risk that the position will shift during firing.
This can lead to mistakes in robot handling. In extreme cases, surrounding equipment may be involved and damaged. In order to eliminate this risk, higher quality robots and the like would be required, which would be costly.

An alternative to using bedding powder is the use of flat bedding, which is the basis of this invention. If this is used, the problem of biting in the bedding powder or smoothing the surface of the bedding powder when using robots will be eliminated, but if the bottom surface of the molded object is curved, it will not only be necessary for robot work, but also for conventional work. Even in the case of manual work, displacement of the molded product is a problem, and in the case of a molded product with a flat paper surface, this is undesirable because it blocks the gas passage for decomposition and oxidation of the organic binder. Therefore, in the past, the use of floorboards was limited to cases where the molded product was very small and the organic binder was very easy to decompose.

[Summary of the invention]

This invention was made in view of the above-mentioned circumstances regarding conventional bedding powder and bedding plates, and it can be used regardless of the shape of the bottom surface of the object to be fired, and there is no adhesion of bedding powder to the object to be fired. The purpose of the present invention is to provide a baking board that can be easily introduced by robots, and achieves the above objectives by configuring the board in a shape that has grooves in at least one direction on its surface. It is.

[Embodiments of the invention]

The invention will now be described in detail with reference to the illustrated embodiments.

As shown in FIG. 3, the baking plate 12 of the present invention has grooves/3 on its surface in at least one direction. Therefore,
As shown in Fig. 1, when using a bottom plate 12 in the center 1 and placing the molded body 3, which is the object to be fired, on it, between the object to be fired and the seven ivy. , molded body 3
can be lined up in the groove 13.

As will be described later, the shape of the molded body 3 is not limited to the round bar shape shown in the illustrated example, but its material is not particularly limited, and the materials of the center 1 and the bottom plate 12 can also be selected from among the 30 types of molded bodies.

Now, as an example, select a zinc oxide lightning arrester element (hereinafter simply referred to as the element) containing ZnO as the main component as the molded body 3, A1 Yuoj as the material of the center 1, and partially stabilized zirconia as the material of the bottom plate. . The center 1 is carried into a firing furnace (not shown) in the state shown in the figure and fired. Firing furnaces include batch furnaces, tunnel furnaces, etc.
Tunnel furnaces can also be divided into bush type furnaces, cart type furnaces, etc. depending on the driving method. Although these choices are also free, the explanation will be given using a bushy tunnel furnace as an example.

Due to the movement of the bushings, the centers are carried into the firing furnace one after another, and each center moves through the firing furnace in sequence, during which firing takes place, and finally it is taken out of the furnace again to complete firing. . During this time, a considerable amount of impact is applied to the center due to the force.

The state of taking out the element after firing, the appearance inspection of the element, or the results of internal flaw detection using non-destructive testing methods, not only prevents the fusion of the element with the center, which is the role of conventional bedding powder, but also prevents the element, that is, the molded body 3 and the bedding plate l. There was no fusion, and there were no problems with element slippage, decomposition of the organic binder, or securing a passage for the oxidizing gas.

Furthermore, one of the objects of this invention is a molded body (fired body).
Regarding the appearance issues, there is of course no biting of the bedding powder that was seen in the past, and there are almost no traces of contact with the bedding plate on the element surface, so there is no need for post-processing such as polishing. It was a state. Furthermore, it was confirmed that the effect of the grooves 13 is that there is no displacement of the position of the element despite the impact of bumps, etc., and that it is very effective for robot handling.

FIG. S shows an embodiment in which the bottom plate 13 of the present invention is used for firing a molded body with a flat bottom surface, and in this case,
In particular, we raised the issue of gas for decomposition and oxidation of the organic binder, but there were no problems with the appearance or the results of internal flaw detection.
It was confirmed that by providing a light source, a gas passage for decomposition and oxidation of the organic binder could be secured.

In the above embodiment, a plurality of grooves 13 with a triangular cross section extending in one direction are provided at regular intervals only on the upper surface of the bottom plate 7.2 is illustrated and explained, but the bottom plate is placed in the center. In order to eliminate the need for cleaning and checking the top and bottom, grooves may of course be provided on both the top and bottom surfaces (also, the direction of the groove t3 is not limited to one direction; For example, the grooves may be arranged in two directions in a lattice shape, or may be provided in three or more directions, so that the grooves are well-formed.The shape of the grooves is not limited to a triangular cross-sectional shape, but may also function as a groove. If so, any shape can be selected, including, for example, a semicircular shape.

Furthermore, the number of floor plates is not limited to one, and a number of small plate pieces may be combined to form a floor plate for one center. If the bottom plate is composed of a combination of small plate pieces, for example, as shown in the figure, one edge of the surface of the small plate piece 7.2a having a rectangular cross section is cut diagonally. A plurality of small plate pieces having a deformed hexagonal cross section are obtained by cutting off the small plate pieces, and a plurality of these pieces are lined up next to each other, and the cut parts/3a of the two small plate pieces lined up next to each other meet and form the groove 13. You may do so. Even in the case of this embodiment, the number of diagonally cut edges is not limited to two, but may be one or more for the purpose of forming a groove. Further, the shape of the cut is not limited to that shown in the drawings.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to eliminate the need to provide a groove in the bottom plate and place the molded article thereon for firing. The absence of positional deviation before and after firing also facilitates the introduction of robots, and the present invention has the effect of allowing ceramics and the like to be fired easily and at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional molded body baking machine using powder, Fig. 2 is a cross-sectional view taken along the line ■-■ in Fig. Fig. 3 is a perspective view showing an embodiment of the bottom plate, Fig. 3 is a cross-sectional view of the bottom plate shown in Fig. 3 combined with a center when used for firing a molded product with a curved bottom surface, and Fig. S is a cross-sectional view of the bottom plate shown in Fig. FIG. 6 is a sectional view similar to FIG. D in the case of a flat molded body, and a perspective view showing another embodiment of the bottom plate. t... center, ko... bedding powder, 3. Da... Molded object, 12.
・Bottom plate, /, 2a...Small board piece, 13...Groove, /,? a・
・Cut-off part. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] (1) A firing base plate having grooves in at least one direction on its surface and used between an object to be fired and a center when firing ceramics or the like. (, 2) The firing base plate according to claim 1, wherein the grooves in at least one direction are formed in parallel with a triangular cross section. (3) A large number of small plate pieces with the edges of the surface cut off diagonally are arranged in parallel next to each other so that grooves in at least one direction are formed by a combination of the parts of the edges cut diagonally. A baking board according to claim 1.