JPH05724U - Jig for firing - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide a firing jig in which an object to be fired does not stick and which does not require spread powder. A further object of the present invention is to provide a firing jig in which the steps of spraying the spread powder, washing, etc. can be omitted and the workability can be greatly improved. Further, the present invention provides a firing jig capable of obtaining a sintered body having more excellent characteristics by reducing reaction, fusion and friction by reducing the contact with the material to be fired as compared with the spread powder. The present invention is to provide a jig for firing, characterized in that it has a plurality of hemispherical projections on the upper surface that comes into contact with the object to be fired.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a firing jig used when firing and heat treating various ceramics.

[0002]

[Prior Art]

 Conventionally, a flat baking substrate or a grooved baking plate (jig) is used depending on the shape of the object to be baked. This jig with a groove is generally attached so that the material to be fired does not roll, and generally, a groove is provided only on one surface. That is, these grooves are used to reduce the contact area between the object to be fired and the jig or to hold the rod-shaped object to be fired.

Further, the firing jig has a function such as an electronic ceramics material, and in the firing process of a structural material, the fusion of the material to be fired with the firing jig, reaction, or firing shrinkage of the material to be fired. In order to reduce friction, an inorganic powder called sowing powder is generally sprayed. Such a conventionally used spreading powder is a fine powder having a particle size of 42 to 325 mesh (that is, 300 to 44 μm), which is selected as a material having a minimal reaction with the material to be fired. And, naturally, such a spreading powder has to be uniformly sprayed, and in the firing process, it may adhere to a firing jig or an object to be fired. There is no. That is, the spread powder adhered and adhered to the firing jig must be scraped off each time, and the spread powder adhered and adhered to the object to be fired must also be cleaned with an ultrasonic cleaner or the like. In addition, the spread powder is a fine powder, and in the firing process, the spread powder is often fixed and discarded without being collected or reused, each time.

[0004]

[Problems to be solved by the device]

 The present invention has been made to solve the above problems, and an object of the present invention is to provide a firing jig in which the material to be fired does not stick and which does not require spread powder. A further object of the present invention is to provide a firing jig which can greatly reduce workability by omitting steps such as spread of spreading powder and washing. Further, the present invention is a jig for firing which can reduce the reaction, fusion and friction by reducing the contact with the material to be fired as compared with the spread powder, and can obtain a sintered body with more excellent characteristics. The purpose is to provide.

[0005]

[Means for Solving the Problems]

 The present invention has been made to solve the above technical problems, and provides a firing jig having a plurality of hemispherical protrusions on the upper surface that comes into contact with the object to be fired. .

[0006]

[Action]

 As a result of intensive studies on the necessity and problems of the spread powder, the present inventors provided a large number of hemispherical projections on the surface of the jig for baking, and burn the object to be baked on it. As a result, it has been found that a good sintered body can be obtained without using spread powder, and based on this finding, the present invention has been accomplished.

More specifically, the diameter of the hemispherical protrusions, the number of protrusions, and the intervals are determined according to the shape and weight of the object to be baked. The material for the firing jig of the present invention is selected so that the reaction with the object to be fired is minimal. Moreover, the firing jig is generally formed by a hydraulic press forming, but is not particularly limited.

Since the object to be fired is placed and fired on a large number of hemispherical protrusions formed on the upper surface of the firing jig, the object to be fired is different from that when the spread powder is used. The number of contacts is smaller, and therefore, the friction associated with the reaction, fusion and firing shrinkage of the object to be fired is reduced, and a good sintered body is obtained.

Next, the firing jig of the present invention will be specifically described by way of examples, but the present invention is not limited thereto.

[0010]

Example 1 FIG. 1 is a side view (A) and a plan view (B) showing an example of a firing jig of the present invention. That is, a zirconia firing jig having a shape as shown in the drawing, that is, a plate-shaped object 1 having a large number of hemispherical projections 2 formed on the upper surface thereof was molded. When the article 5 to be fired is placed on the firing jig 1 and fired, as shown in the side view of A, it is supported by the apexes of a large number of protrusions 2. The contact surface is very small, and there is almost no reaction or fusion between the jig for firing and the object to be fired, and the firing can be performed. Further, as shown in the figure, since it is supported by points, there is almost no friction with the material to be fired during the firing treatment, and a good sintered body can be obtained.

[0011]

Second Embodiment FIG. 2 is a side view (A) and a plan view (B) showing another example of the firing jig of the present invention. Similar to the first embodiment, a large number of protrusions 2 are provided on the upper surface. Further, it has end projections 3 on both sides of the upper surface of the jig, so that it can be stacked and has a shape like a bank so that the material to be fired 5 does not fall from the jig. Is.

[0012]

[Effect of the device]

 As explained above, the above-described effects were obtained by the firing jig of the present invention. Summarizing them, the following remarkable technical effects are obtained. That is, firstly, a firing jig is provided in which the article to be fired is not fixed and spread powder is not required. Secondly, we provided a firing jig that drastically improves workability by omitting processes such as spread of spreading powder and washing. Thirdly, as compared with the spread powder, by providing less contact with the material to be fired, reaction, fusion and friction are reduced, and a firing jig that can obtain a sintered body with more excellent characteristics is proposed. To serve.

[Brief description of drawings]

FIG. 1 is a side view and a plan view of an example of a firing jig of the present invention.

FIG. 2 is a side view and a plan view of another example of the firing jig of the present invention.

[Explanation of symbols]

 1 Jig for firing 2 Hemispherical protrusion 5 Object to be fired

Claims (1)

[Claims for utility model registration] 1. A firing jig having a plurality of hemispherical projections on an upper surface which comes into contact with an object to be fired.