JPH0914849A - Ceramic chain for baking furnace - Google Patents

Abstract

PURPOSE: To provide a ceramic chain capable of being set without powder and without sheath by standing a circular molding and having many number of treatments. CONSTITUTION: This ceramic chain for a baking furnace comprises a plurality of chain jigs each having an elliptical hole 4b and a long elliptical hole 4c, and support jigs 1, 2, 3 formed with a plurality of grooves 1 of annular protrusions at a central shaft 1a and formed with bearings 1d and stoppers 1e, 1f at both the ends of the shaft 1a, wherein the hole 4b of the one jig 4 is superposed on the hole 4c of the other jig to form one set of annular chain. The chain for the furnace is formed by passing the jigs 1, 2, 3 to the holes 4b and 4c of one set of the annular chain.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a continuous firing furnace,
The present invention relates to a ceramic chain for a firing furnace in which a fired ceramic compact is placed and fired continuously.

[0002]

2. Description of the Related Art A conventional firing furnace ceramic chain is shown in FIG. 8A. The conventional ceramic chain for a firing furnace is configured by connecting a female chain jig 11 shown in FIG. 9B and a male chain jig 12 shown in FIG. Then, on the ceramic chain for the firing furnace, the fired ceramic molded body 13 is directly placed horizontally, or the fired ceramic molded body 14 is placed vertically, and is conveyed to a firing furnace (not shown) for continuous firing. To do.

[0003]

However, in the conventional ceramic chain for a firing furnace, when the molded body 13 is directly placed horizontally on the ceramic chain, a chemical reaction easily occurs between the molded body 13 and the molded body 13. To prevent chemical reactions,
When a powder such as co-dough or zirconium oxide (ZrO ₂ ) is laid, this powder attaching step is required and the powder peeling step is also required. Further, when the molded body 13 is placed horizontally on the firing furnace ceramic chain, the number of processes is reduced. On the other hand, when the molded body 14 is placed vertically on the chain, the molded body 14 is likely to have an appearance defect at the contact point with the ceramic chain, and in the case of a large shape, the temperature distribution becomes uneven, and There was a problem that it was easy to move on the chain and was unstable.

[0004] Therefore, an object of the present invention is to provide a ceramic chain for a firing furnace which can stand a circular molded body and can be set without powder and without sheath, and which has a large number of treatments.

[0005]

In order to achieve the above object, the present invention is directed to a chain jig in which an elliptical hole and an oblong hole are provided at a predetermined interval in a ceramic plate, and a center of a shaft. A plurality of grooves are formed at predetermined intervals by an annular projection on the portion, and a bearing portion is provided at both ends of the shaft and a diameter that is partially larger than the diameter of the bearing portion outside the bearing portion, And a supporting jig integrally having a stopper part that is inserted into the elliptical hole and the oblong hole of the chain jig, respectively. A pair of annular chains are formed, and the bearing portions of the bearing jigs are axially supported by the elliptical holes and the oblong holes of the pair of annular chains, respectively, and the grooves of the adjacent bearing jigs are formed. Place the fired ceramic compact between It is characterized in.

Further, the present invention is characterized in that the depths of the grooves formed in the support jig are the same or different.

[0007]

Operation: A plurality of ceramic chain jigs and a supporting jig are combined to form a ceramic chain, and the groove between adjacent supporting jigs is placed between the grooves to form a circular ceramic to be fired. Since it is formed to be slightly larger than the diameter of the body, when the fired ceramic compact is reduced by sintering, it falls from the groove to the hearth, is transported while rotating on the hearth, and is subsequently fired. Therefore, the fired ceramic compact does not cause a chemical reaction between the hearths and is uniformly fired.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a front view of the first support jig in this embodiment, FIG. 1B is a left side view, and FIG. 1C is a right side view. In the figure, the shaft 1 is attached to the center of the first support jig 1.
With a plurality of annular projections 1b integrally formed on a,
A plurality of ring-shaped grooves 1c are formed. This groove 1c
Has a depth of 3 mm and a width of 2 mm, for example. The corners of the annular protrusions 1b on both sides of the groove 1c are chamfered. Axis 1a
Bearings 1d having the same diameter as the annular projection 1b and a circular cross section are integrally provided at both ends of the bearing. Further, stoppers 1e and 1f are integrally provided on the outside of the bearing portion 1d. The stopper 1e on the one end side is a circle having a diameter slightly larger than that of the bearing portion 1d, and is formed slightly larger than the elliptical hole and the oblong hole of the chain jig described later. The stopper 1f on the other end side has an elliptical shape obtained by cutting arcs on both sides of a circle. The diameter between the cut portions 1g, 1g on both sides is the elliptical hole and the elliptical hole of the chain jig described later. Although it is formed slightly smaller than the above, the diameter between opposing arcs is formed slightly larger.

The second support jig 2 shown in FIG. 2 has a shape similar to that of the first support jig 1 shown in FIG. However, the bearing portion 2h on the one end side is different from the bearing portion 1d of the first bearing jig 1 in that the axial length thereof is slightly shorter, which is equivalent to the other first bearing jig 1. The same numbers are given to the parts to be described and the description thereof is omitted.

The third support jig 3 shown in FIG. 3 has a shape similar to that of the second support jig 2 shown in FIG. However, they differ in the following points. Although the shaft 1a shown in FIGS. 1 and 2 has a circular cross-sectional shape, the shaft 3j shown in FIG. 3 has a substantially rectangular cross-sectional shape, and the center line of the shaft 3j has bearing portions 1d, 2h. Unlike the center line of, it is displaced slightly downward. The depths of the grooves formed on the upper and lower sides of the shaft 3j are not the same, and the depth of one groove 3k is, for example, 4 m.
m, the depth of the other groove 3n is, for example, 2 mm. Thus, the two grooves 3k and 3n having different depths are provided on the upper and lower sides of the shaft 3j by eccentricity from the centers of the bearing portions 2h and 1d. The width of the grooves 3k and 3n is the first
Like the support jig 1 and the second support jig 2, it is 2 mm. Others are the same as those of the first support jig 1 and the second support jig 2, and the same reference numerals are given to omit the description.

Next, the chain jig 4, which is another component of this embodiment, will be described with reference to FIG.
This chain jig 4 includes an elliptical ceramic plate 4a having semicircles at both ends of two parallel sides, and an elliptical hole 4
b and the oblong hole 4c are provided with their long axes in the same direction and at a predetermined interval. Oval hole 4b
, One of the bearings of each of the supporting jigs is locked, and two of the bearings are locked in the oblong hole 4c.

The first supporting jig 1, the second supporting jig 2, the third supporting jig 3 and the chain jig 4 are made of alumina,
It consists of ceramics such as mullite and silicon carbide.

Next, an aspect of assembling the ceramic chain for a firing furnace according to this embodiment using the constituent members shown in FIGS. 1 to 4 will be described with reference to FIG. A set of a plurality of chain jigs 4 is prepared so as to be assembled on the left and right in the drawing. Then, the elliptical hole 4b of one chain jig 4 and the end of the oblong hole 4c of another chain jig 4 are aligned in a zigzag shape to form one set of annular chains, and the two chain jigs 4 are overlapped. The first supporting jig 1 is passed through the elliptical hole 4b and the oblong elliptic hole 4c, respectively, in a set, and the second supporting member is provided from the central portion of the chain jig of the oblong hole 4c where the chain jig 4 does not overlap. The jig 2 or the third support jig 3 is passed through one set to form a firing furnace ceramic chain. When passing the first supporting jig 1, the second supporting jig, or the third supporting jig into the elliptical hole 4b or the oblong hole 4c, perform the cutting from the short cut portion 1g side, and after inserting. By rotating these by 90 degrees, the long diameter portions of the stoppers 1e, 1f are locked in the elliptical hole 4b and the oblong hole 4c, and the first bearing jig 1, the second bearing jig 2, and the third bearing jig. Three
Does not come off from the elliptical hole 4b and the oblong hole 4c.

The ceramic chain for a firing furnace according to the present embodiment assembled in this way is changed by changing the intervals between the elliptical holes 4b and the oblong holes 4c provided in the chain jig 4 and also by supporting each support. Groove 1c formed in the tool,
By adjusting the depths of 3k and 3n, the pitch a between the grooves for mounting the sintered compact between the supporting jigs adjacent to each other,
It is possible to change b, c, and d, and it is possible to correspond to the fired ceramic compacts having different diameters. For example, if the pitch a is set to 15 mm, the size of the ceramic body to be fired before firing can correspond to a ceramic body to be fired having a diameter of 16 to 18 mm and a thickness of 1.8 mm or less.
Is 10 mm, it means that the size of the ceramic molded body before firing can correspond to a ceramic molded body to be fired having a diameter of 11 to 13 mm and a thickness of 1.8 mm or less. Third support jig 3
Has a deep groove 3k and a shallow groove 3n on both sides,
Formed bodies of different diameters can be fired on both sides.

Next, the firing mode of this embodiment will be described with reference to FIGS. 6 and 7. Between the grooves 1c and 1c (shafts 1a and 1a) of the first supporting jig 1 and the second supporting jig 2 which are adjacent to each other in the ceramic chain for a firing furnace according to the present embodiment,
A plurality of fired ceramic compacts 5a and 5b are placed. In this case, the fired ceramic molded bodies 5a and 5b are
The diameter is slightly larger than the span between the mounted grooves 1c, 1c (shafts 1a, 1a). Therefore, as shown in FIG.
a, 5b do not fall into the hearth 6 and the grooves 1c, 1c (shaft 1
a, 1a). Ceramic body 5 to be fired
When a and 5b are sintered and reduced in a tunnel furnace (not shown), the grooves 1c and 1c (shaft 1a, shaft 1a,
It falls from 1a) onto the lower hearth 6 and is carried while rotating on the hearth 6.

In this embodiment, since the ceramic chain for the firing furnace is composed of the first, the second and the third, and the three types of support jigs having different groove depths, four types of circular shapes having different diameters are used. The fired ceramic molded body of can be fired.

In the above embodiment, the first supporting jig 1, the second supporting jig 2 and the third supporting jig 3 having different groove depths are used.
A ceramic chain for a firing furnace was constructed by combining the above, but by combining the first supporting jig 1 and the second supporting jig 2 or the first supporting jig 1 and the third supporting jig 3. You may make it fire one type of to-be-fired ceramic compact.

Further, in the above embodiment, the chain jig 4 is provided with the elliptical hole 4b and the oblong hole 4c. However, the oblong hole 4c is used as an elliptic hole, and another elliptic hole is provided.
The number of the elliptical holes may be three in total.

[0019]

According to the present invention, the distance between the grooves of the adjacent support jigs is
It is formed slightly larger than the diameter of the fired ceramic molded body placed between the grooves, and when the fired ceramic molded body is sintered and reduced in size, it falls from the groove to the hearth and rotates on the hearth. Since it is carried while it is being carried, there is no chemical reaction between the fired ceramic compact and the hearth, and it is fired to a uniform composition.

Further, according to the present invention, due to the size between the elliptical hole and the oblong hole of the chain jig and the depth of the groove of the supporting jig,
The size of the fired ceramic compact can be accommodated.

Further, according to the present invention, since the circular shaped ceramic compact to be fired is placed upright in the groove of the supporting jig and is fired, the throughput can be improved.

[Brief description of the drawings]

1 shows a first support jig in an embodiment of a ceramic chain for a firing furnace according to the present invention, where A is a front view, B is a left side view, and C is a right side view.

FIG. 2 shows a second support jig in an embodiment of a ceramic chain for a firing furnace according to the present invention, where A is a front view, B is a left side view, and C is a right side view.

FIG. 3 shows a third support jig in one embodiment of a ceramic chain for a firing furnace according to the present invention, where A is a front view, B is a left side view, and C is a right side view.

FIG. 4 is a front view of a chain jig in an embodiment of a ceramic chain for a firing furnace according to the present invention.

FIG. 5 shows an assembling mode of the present embodiment.
Is a diagram showing a mode of connection between the chain jig and each supporting jig, B
Is the assembly layout of the chain jig

FIG. 6 is an explanatory view of a situation where a molded article to be fired is placed on an embodiment of a ceramic chain for a firing furnace according to the present invention.

7 is an explanatory view taken along the line X-X in FIG. 6, where A is an illustration before sintering and B is an illustration after sintering.

FIG. 8 illustrates a conventional firing furnace ceramic chain, where A is a front view of a firing furnace ceramic chain on which a ceramic body to be fired is mounted, B is a front view of a female chain jig, and C is a male. -Shaped chain jig front view

[Explanation of symbols]

 1 1st support jig 1a, 3a Shaft 1b Annular projection 1c, 3k, 3n Groove 1d, 2h Bearing part 1e Stopper 1g Cutout part 2 2nd support jig 3 Chain support jig 4 Chain jig 4a Oval shape Ceramic plate 4b Elliptical hole 4c Long elliptical hole 5a, 5b Ceramic body to be fired 6 Hearth

Claims (2)

[Claims] 1. A chain jig in which an elliptical hole and an oblong hole are provided at a predetermined interval on a ceramic plate, and a plurality of grooves are provided at a predetermined interval by an annular projection at the center of a shaft. Is formed at both ends of the shaft and has a diameter partially larger than the diameter of the bearing on the outside of the bearing and is inserted into the elliptical hole and the oblong hole of the chain jig. A supporting jig having stopper parts integrally, and a plurality of chain jigs having elliptical holes and oblong holes overlapping each other to form a set of annular chains. It is configured such that the bearing portions of the supporting jigs are axially supported in the holes and the oblong holes, respectively, and the sintered ceramic compact is placed between the grooves of the adjacent supporting jigs. Characteristic ceramic chain for firing furnace. 2. The ceramic chain for a firing furnace according to claim 1, wherein the grooves formed in the support jig have the same or different depths.