JP2882055B2 - Drying equipment for long extruded ceramic raw plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for drying a long extruded ceramic green sheet, and more particularly to a method for measuring the size of a long extruded ceramic green sheet without causing drying cracks of the long extruded ceramic green sheet. The present invention relates to an apparatus for drying accurately.

[0002]

2. Description of the Related Art Conventionally, as a method of drying a long extruded ceramic raw plate to obtain a dried product with high dimensional accuracy, a method of drying a cut raw plate on a roller conveyor equipped with a driving device. A method in which the material is continuously processed on a roller conveyor without cutting until the end of extrusion molding and drying, and cutting is performed when shrinkage is completed. After cutting, a method of restraining by a mold during drying to obtain a desired shape. There is.

[0003]

However, in the above-mentioned methods (1) to (4), although it is possible to dry efficiently, a dried product deformed due to a dry state or the shape of a molded product is obtained. Dimensional accuracy cannot be maintained. In the method (1), it is necessary to synchronize the speed of the extrusion molding with the speed of the drying, and there is a drawback in that the operation for this is difficult and it is not possible to cope with the trouble of the apparatus. Further, the method (1) has a drawback that the raw plate is easily damaged when the raw plate is moved onto the mold and when the raw plate is removed, and furthermore, it takes time and effort. In addition, since the absolute length of shrinkage increases when it becomes a long object,
There is also a disadvantage that shrinkage cracks are easily formed by friction with the mold.

The present invention solves the above-mentioned problems of the prior art,
An object of the present invention is to provide an apparatus for drying a long extruded ceramic green plate with high dimensional accuracy without causing drying cracks of the long extruded ceramic green plate.

[0005]

According to the present invention, there is provided an apparatus for drying a long extruded ceramic green plate, wherein the axial directions are arranged in parallel with each other and the axial direction is inclined with respect to the horizontal direction. A roller row composed of a plurality of rollers on which a long extruded ceramic green plate is carried, and arranged on one end side in the inclination direction of each roller of the roller row, and carried on the roller row A first side surface warpage preventing plate supporting one side in the width direction of the long extruded ceramic green plate;
A guide shaft installed with its longitudinal direction parallel to the axial direction of the roller, a slider engaged with the guide shaft and movable along the guide shaft, and a roller of each roller of the roller row. It is arranged on the other end side in the inclined direction, is supported by the slider and is movable in the axial direction of the roller, and the other in the width direction of the long extruded ceramic green plate supported on the roller row. And a second side surface warpage prevention plate abutting on the side portion.

[0006]

According to the apparatus for drying a long extruded ceramic green sheet of the present invention, the long extruded ceramic green sheet can be directly received from the extruder into a mount composed of roller rows. For this reason, it is possible to move to the drying step without damaging or deforming the still green plastic sheet. Further, in order to improve the linearity, the molded body is corrected by the side warpage preventing plate, and deformation due to drying can be prevented even during drying. That is, a raw plate having its side in the width direction sandwiched between the first and second side warpage preventing plates having good linearity in the same direction as the extrusion direction is inclined in the width direction while being placed on the roller row. The raw plate is heated and dried in the hot state. At this time, since the second side surface warpage prevention plate is always urged along the inclination direction by gravity, the raw plate can always be pressed with a uniform pressing force even if the raw plate contracts.

In the apparatus for drying a long extruded ceramic raw plate of the present invention, since the side warpage preventing plate is urged by utilizing the gravity, the side warpage preventing plate always generates a uniform pressing force. Can be given to the board. By the way, if the side warpage preventing plate is urged by a spring, the urging force fluctuates along with the extension of the spring, so that the pressure for pressing the raw plate fluctuates with the contraction of the raw plate. Therefore, the raw plate cannot always be pressed with a uniform pressing force, and it is difficult to obtain a product with good dimensional accuracy.

In the apparatus for drying a long extruded ceramic green sheet of the present invention, since the green sheet is supported on a freely rotatable roller, shrinkage of the green sheet during drying and friction with the support are reduced. The resulting deformation and cracks can be prevented. That is, since the roller is freely rotatable, the roller can be moved in the length direction by the roller even when the raw plate is contracted, and there is almost no friction, so that deformation such as cracking or warping does not occur. In addition, since the raw plate on the roller is hard to move in the width direction, by applying vibration to the roller to facilitate the movement of the raw plate in the width direction, it is possible to freely move against shrinkage in the width direction, Cracks and deformation caused by shrinkage and friction in the width direction can be more reliably prevented.

In general, a long extruded ceramic green plate is often dried at around 100 ° C., and the dried body after drying has low strength and is easily damaged when it is moved from a dryer to a furnace for firing. . However, according to the apparatus for drying a long extruded ceramic green sheet of the present invention, it is possible to move horizontally from a gantry composed of a row of rollers to a baking apparatus such as a roller hearth kiln at the same level, thereby preventing damage at this time. Can be.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a long extruded ceramic raw sheet drying apparatus according to an embodiment of the present invention.

FIG. 1 is a plan view illustrating an apparatus for drying a long extruded ceramic raw sheet according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line-and-of FIG. In FIG. 1, a long extruded ceramic green plate is omitted.

As shown in the figure, in the apparatus for drying a long extruded ceramic green plate of this embodiment, a machine base 2 is installed on a horizontal ground base 1 and extends in a direction parallel to each other on the machine base 2. The first bracket 3 and the second bracket 4 are fixed.

Many rollers 5 are provided between the brackets 3 and 4.
Is installed so that it can rotate freely. The rollers are arranged so that their axes are parallel to each other and the bracket 3 side is lower than the bracket 4 side. Each roller 5 forms a roller row 6.

A first side surface warpage preventing plate 7 is fixed on the first bracket 3. A second side surface warpage prevention plate 8 is provided on the upper surface of the roller row 6 and at a position near the second bracket 4.

A guide shaft 9 is provided between the brackets 3 and 4 in parallel with the roller 5, and a slider 10 is slidably fitted on the guide shaft 9. The second
The side warpage prevention plate 8 is supported by the slider 10 via a support member 11. Since the slider 10 is slidable with respect to the guide shaft 9, the second side warpage preventing plate 8 receives its own weight and
Further, the support member 11 is urged in the direction A in FIG. 2 by the weight.

In order to dry the long extruded ceramic green sheet by such a device for drying a long extruded ceramic green sheet, first, the second side warpage preventing plate 8 is pressed in the direction of the bracket 4. Then, the long extruded ceramic green sheet 11 obtained by extrusion molding is directly received on the roller row 6 from the extruder. Then, release the hand holding the side-surface warpage preventing plate 8 to separate the first and second side portions of the raw plate 11 from both sides.
While being held between the side warpage preventing plates 7 and 8, it is directly moved into a drying device and dried under predetermined conditions. In this drying, the raw plate is dried with good dimensional accuracy without deformation or breakage by receiving a pressing force or the like by the side warpage prevention plate under the support of the free rotation of the roller.

The dried body obtained by drying by the apparatus of the present invention can be horizontally moved from above the roller row 6 to a firing device such as a roller hearth kiln and fired to obtain a product.

In the present invention, the long extruded ceramic raw plate is generally about 3 m in length, and is composed of frog eye clay, kibushi clay, talc, feldspar, wollastonite, chamotte, pottery stone, It is obtained by kneading a raw material mainly composed of alumina or the like and extruding it.

Hereinafter, specific experimental examples will be described.
Experimental Example 1 An appropriate amount of water was added to 20 parts by weight of Frogme clay, 30 parts by weight of Kibushi clay, 30 parts by weight of wollastonite, 10 parts by weight of chamotte, and 10 parts by weight of pottery stone, and kneaded. This raw material was extruded into a hollow panel having a width of 400 mm and a thickness of 30 mm. The obtained raw plate is cut into a length of 3 m, and FIG.
As shown in FIG. 3, it was received on a row of rollers and was placed in a dryer as it was. After drying at about 100 ° C. for one day, the obtained dried body had sufficient dimensional accuracy, hardly any dry deformation, and did not crack. The dried product was directly fed into the roller hearth kiln from above the roller row and fired, and the process was performed until glaze firing. As a result, an extruded hollow ceramic panel with sufficient dimensional accuracy was finally obtained.

[0020]

As described in detail above, according to the apparatus for drying a long extruded ceramic green sheet of the present invention, a long extruded ceramic green sheet can be formed with extremely high dimensional accuracy without causing drying cracks. Thus, it is possible to dry easily and efficiently.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an apparatus for drying a long extruded ceramic green sheet of the present invention.

FIG. 2 is a sectional view taken along the line-in FIG.

FIG. 3 is a sectional view taken along the line-in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground base 2 Machine base 3 1st bracket 4 2nd bracket 5 Roller 7 1st side warpage prevention plate 8 2nd side warpage prevention plate 9 Guide shaft 11 Long extruded ceramic raw plate

Claims (1)

(57) [Claims] 1. A plurality of rollers which are arranged with their axial directions parallel to each other and whose axial direction is inclined with respect to the horizontal direction, and on which a long extruded ceramic green plate is carried. And one end of the long extruded ceramic green plate supported on the roller row in the width direction. A first side surface warpage prevention plate, a guide shaft installed with a longitudinal direction parallel to the axial direction of the roller, and a slider engaged with the guide shaft and movable along the guide shaft. A long extrusion formed on the other end of each roller in the roller row, supported by the slider, and movable in the roller axis direction. Ceramic raw plate width direction And a second side warpage prevention plate abutting on the other side of the ceramic raw plate.