JPH0141120Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application This invention relates to an improvement in the form of the fired material to be employed when firing plate-shaped ceramic molded bodies stacked in multiple stages.

BACKGROUND OF THE INVENTION Usually, when firing plate-shaped ceramic molded bodies that are to become the bodies of electronic components such as capacitors, they are stacked in multiple stages on a suitable base plate and then transported into a firing furnace.

However, when stacking plate-shaped ceramic molded bodies in multiple stages and firing them in a tunnel-type firing furnace, for example, the vibrations of the conveyance drive unit and other motors can cause the plate-shaped ceramic molded bodies in the multi-stages, especially in the upper stage, to shift and deform. There were times when the building would collapse or collapse. In order to prevent this, conventional methods have been to reduce the number of stacked ceramic plate moldings, or to use an alumina jig to fill the ceramic plate moldings and fire them.

Problems to be Solved by the Invention However, among the above-mentioned measures, when reducing the number of stacked plate-shaped ceramic molded bodies to be fired, there was a problem in that productivity decreased.

Further, when an alumina jig is used, the heat capacity of this jig is extremely large, resulting in an increase in energy consumption required for firing. In addition, since such jigs do not have good spall resistance, the heating and cooling rates must be determined from the perspective of protecting the jigs, and the jigs control the heating and cooling rates. There were also some inconveniences. Furthermore, after firing, work is required to reuse the jig, which increases production costs.

Therefore, the present invention is intended to provide a manner of holding a plurality of stacked plate-shaped ceramic molded bodies as ceramic objects to be fired, which can solve the above-mentioned conventional problems.

Means for Solving the Problems In this invention, the ceramic object to be fired is produced by holding a plurality of plate-shaped ceramic molded bodies stacked in a contracted heat-shrinkable resin tube. configured.

Effects of the invention In most cases, misalignment occurs in plate-shaped ceramic molded bodies stacked in multiple stages after they are stacked.
It is known that these are the process of transporting the ceramic body into the firing furnace and the initial stage of firing, that is, the process from the ceramic molded body being fired until the binder is burned. Therefore, according to this invention, the plate-shaped ceramic molded body can be held by the heat-shrinkable resin tube during the above-mentioned process in which misalignment is likely to occur, so that the occurrence of misalignment can be advantageously prevented.
Therefore, the yield rate of ceramics after firing increases.

Further, since the tube made of resin burns out almost at the same time as the binder burns, the subsequent rate of temperature rise and cooling can be controlled independently of the resin tube.

Further, the heat shrinkable resin tube has a heat capacity of almost zero, and the energy loss is extremely small compared to the case where a conventional alumina jig is used.

Furthermore, unlike conventional alumina jigs, there is no need to consider reuse, which eliminates the need for reuse work and reduces firing costs.

As a result of the several effects mentioned above, the productivity of ceramic firing is improved.

Embodiment A ceramic fired object 1 according to an embodiment of this invention is shown in a perspective view in FIG. The ceramic fired object 1 has a configuration in which a plurality of stacked disc-shaped ceramic molded bodies 2 are held in a contracted heat-shrinkable resin tube 3.

FIG. 1 shows a state in which a plurality of ceramic objects 1 to be fired are placed on a base plate 4 made of alumina or the like. In this state, it is placed on a conveying device, sent into a firing furnace by a pusher, etc., and fired as it is.

FIG. 2 shows a plurality of disc-shaped ceramic molded bodies 2 stacked one on top of the other. A plurality of such ceramic molded bodies 2 are covered with unshrinkable heat-shrinkable resin tubes 3, as shown by imaginary lines. Then, as shown in FIG. 3, hot air 5 is blown to heat and shrink the heat-shrinkable resin tube 3, which is then bonded to the stacked ceramic molded bodies 2.
Closely contact. In this way, a ceramic fired object 1 is obtained. Since the ceramic molded bodies 2 included in the ceramic fired object 1 are fixed to each other by the heat-shrinkable resin tube 3, there is no misalignment at least until the heat-shrinkable resin tube 3 is burned out. will not occur.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a ceramic fired object 1 placed on a base plate 4 according to an embodiment of the invention. FIG. 2 is a perspective view showing a state in which the stacked ceramic molded bodies 2 are covered with a heat-shrinkable tube 3. FIG. 3 is a diagram showing a state in which hot air 5 is being blown onto the heat-shrinkable tube 3. In the figure, 1 is a ceramic object to be fired, 2 is a ceramic molded body, and 3 is a heat-shrinkable tube.

Claims (1)

[Scope of utility model registration request] A ceramic fired product comprising a plurality of stacked plate-shaped ceramic molded bodies held in a contracted heat-shrinkable resin tube.