TW202223316A - Sintering jig - Google Patents

Abstract

The present invention provides a sintering jig, which is not easy to generate thermal expansion difference between its inside and outside structure and can prevent cracking or deformation even when used in a drastic temperature-changing situation. The sintered jig has a frame body provided with a plurality of hollow parts and a bridge part erected on the hollow part; the bridge part extends toward the outer periphery of the frame body, and forms a notch at the intersection of the at least one part the outer periphery of the frame body.

Description

Sintering fixture

The present invention relates to a sintering jig for placing ceramic products and the like when they are sintered.

Conventionally, in the process of manufacturing ceramic products and the like, a sintering step of sintering a sintered object in a sintering furnace is included. In this sintering step, the object to be sintered is sintered by being placed on a sintering jig in a sintering furnace.

Then, by using a sintering jig having a hollow frame body as disclosed in Patent Document 1, the air permeability, weight reduction, or reduction of heat capacity of the sintering jig can be achieved.

Prior art documents: Patent Document 1, Japanese Patent Publication No. 6274454.

However, the sintering jig is sintered because it is transported into the sintering furnace during the sintering step, and then moved out of the sintering furnace after sintering, so that it is placed in an environment where the temperature difference changes drastically, and the difference in thermal expansion between the inside and outside of its structure is likely to occur. , and becomes prone to cracking or deformation (creeping).

In view of the above-mentioned problems, the present invention provides a sintered jig that is less prone to cracking or deformation (creeping) even under a usage condition where the temperature difference changes drastically.

The sintering jig of the present invention, which has been accomplished in order to solve the above-mentioned problems, is characterized by comprising: a frame body provided with a plurality of hollow parts; The edge extends, and a cutout portion is formed in at least a part of the outer peripheral edge of the frame body that meets. With this configuration, even when the temperature difference changes drastically, the difference in thermal expansion is less likely to occur inside and outside the structure of the sintering jig, cracking and deformation can be prevented, and peeling resistance can be improved.

Even if the sintering jig of the present invention is used in a situation where the temperature difference changes drastically, the difference in thermal expansion is not easily generated between the inside and outside of the structure of the sintering jig, cracking or deformation can be prevented, and peeling resistance can be improved.

Hereinafter, the sintering jig which concerns on embodiment of this invention is demonstrated based on attached drawing.

First, a sintering jig according to an embodiment of the present invention will be described below based on the attached drawings. Fig. 1 is a plan view of a sintering jig according to an embodiment of the present invention. Fig. 2 is a front view of the sintering jig according to the embodiment of the present invention. Fig. 3 is a right side view of the sintering jig according to the embodiment of the present invention.

As shown in FIG. 1 , the sintering jig 10 of the present embodiment has a frame body 11 , a plurality of bridge parts 12 (two in FIG. 1 ), and a plurality of hollow parts 13 (four in FIG. 1 ) ). In addition, the bridge portion 12 extends toward the outer peripheral edge of the frame body 11, and a cutout portion 14 is formed in at least a part of the outer peripheral edge of the frame body 11 where it meets.

The frame body 11 is formed in a rectangular shape in plan view. In addition, the frame body 11 is formed in a thin plate shape in a front view and a right side view. Here, for each side of the frame body 11 in plan view, in the outer peripheral edge of the frame body 11, let the upper end side be 11A, the lower end side be 11B, and the right end side be 11C, Set its left edge to 11D. In addition, the frame body 11 is not limited to the horizontally long rectangle as shown in FIG. 1 , and may be a polygon such as a square or a triangle, or other shapes such as a circle and an ellipse.

As shown in FIG. 2 , the frame body 11 may also be provided with: a support portion 16 formed on the first surface 15 of the frame body 11 and supporting the frame body 11 ; a receiving portion 18 formed on the second surface 17 of the frame body 11 and when When stacking another frame body 11, it can be supported by the support portion 16 of the frame body 11 placed in the vertical direction. For example, as shown in FIG. 1 , six support parts 16 and six receiving parts 18 are provided, respectively.

The bridge portion 12 is formed so as to be continuous with the frame body 11 , and is arranged so as to span the hollow portion 13 formed in the frame body 11 . In the sintering jig 10 of the present embodiment, the bridging portions 12 are provided continuously from the side 11A of the frame body 11 toward the side 11B, and are provided in plural numbers in a continuous manner with the frame body 11 . Specifically, the bridge portion 12 located on the left side is referred to as the bridge portion 12A, and the bridge portion 12 located on the right side is referred to as the bridge portion 12B.

Here, as shown in FIGS. 1 and 4 , the minimum width dimension W of the bridge portion 12 sandwiched between the plurality of hollow portions 13 of the bridge portion 12 is preferably 2 to 15 times the thickness T of the bridge portion 12 . In the present embodiment, the minimum width dimension W of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B described later is preferably 2 to 15 times the thickness dimension T of the bridge portion 12A. Here, when the minimum width dimension W of the bridging portion 12A is twice or more the thickness dimension T of the bridging portion 12A, the pair of brackets and sintered objects placed on the bridging portion 12A can be dispersed in the bridging portion. The load per unit area of the portion 12A is advantageous. In addition, when the minimum width dimension W of the bridge portion 12A is 15 times or less with respect to the thickness dimension T of the bridge portion 12A, the width of the temperature distribution occurring in the bridge portion 12A due to the temperature change in the sintering furnace can be reduced, which is preferable. . Similarly, the minimum width dimension W of the bridge portion 12B sandwiched between the hollow portion 13C and the hollow portion 13D described later is preferably 2 to 15 times the thickness dimension T of the bridge portion 12B.

As shown in FIG. 1, the hollow part 13 is comprised by the hollow parts 13A and 13B partitioned by the bridge part 12A, and the hollow parts 13C and 13D partitioned by the bridge part 12B. Further, the hollow portions 13A, 13B, 13C, and 13D are preferably semicircular, and an angle R is preferably formed at the corner portion formed by the circular arc portion and the linear portion. In this way, since the corner portion is formed as the corner R, it is possible to prevent the load from concentrating on the corner portion and to have a shape in which cracks are less likely to occur.

The cutout portions 14 are preferably provided as a pair at the intersection of the sides 11A or 11B of the frame body 11 where the bridge portions 12A, 12B extend and intersect. In the present embodiment, the notch portion 14A and the notch portion 14B are provided as a pair at the intersection of the sides 11A or 11B of the frame body 11 where the bridge portion 12A extends and intersects. In addition, the notch part 14C and the notch part 14D are provided so that they may become a pair at the intersection of the side 11A or side 11B of the frame body 11 where the bridge part 12B extends and intersects.

In this way, since the notches 14 are provided as a pair, the hot gas in the sintering furnace can be moved without stagnation, and the sintering jig 10, the bracket placed on the sintering jig 10, and the receiver can be moved. Since the temperature of the sintered product is uniform, the difference in thermal expansion within the structure of the sintering jig 10 can be reduced. In addition, the notch part 14 may be provided so that a pair may be formed in the side 11C or the side 11D.

As shown in FIG. 5 , the shortest distance of the bridge parts 12 formed between the notches 14 and the hollow parts 13 is preferably 0.5 to 1.2 times the minimum width dimension of the bridge parts 12 sandwiched between the plurality of hollow parts 13 . In the present embodiment, the shortest distance D of the bridge portion 12A formed between the cutout portion 14A and the hollow portion 13A is 0.5 of the minimum width dimension W of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B ~1.2 times. Here, if the shortest distance D of the bridge portion 12A formed between the cutout portion 14A and the hollow portion 13A is 0.5 times the minimum width dimension W of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B, or its As described above, the area of the bridge portion 12A formed between the cutout portion 14A and the hollow portion 13A can be increased by 1/2 or more relative to the area of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B. Load endurance is better. In addition, the shortest distance D of the bridge portion 12A formed between the cutout portion 14A and the hollow portion 13A is 1.2 times the minimum width dimension W of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B, or its Hereinafter, the region of the bridge portion 12A formed between the cutout portion 14A and the hollow portion 13A can obtain the same temperature distribution width as the region of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B. good.

Moreover, the shortest distance of the bridge portion 12A formed between the cutout portion 14A and the hollow portion 13B, the shortest distance of the bridge portion 12A formed between the cutout portion 14B and the hollow portion 13A, and the shortest distance between the cutout portion 14B and the hollow portion Similarly, the shortest distance of the bridge portion 12A formed between the 11B is 0.5 to 1.2 times the minimum width dimension W of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B. Furthermore, the shortest distance of the bridge portion 12B formed between the cutout portion 14C and the hollow portion 13C, the shortest distance of the bridge portion 12B formed between the cutout portion 14C and the hollow portion 13D, the shortest distance between the cutout portion 14D and the hollow portion The shortest distance of the bridging portion 12B formed between 13C and the shortest distance of the bridging portion 12B formed between the cutout portion 14D and the hollow portion 13D is the bridging portion 12B sandwiched between the hollow portion 13C and the hollow portion 13D 0.5 to 1.2 times the minimum width dimension.

The maximum notch dimension C of the notch portion 14A, that is, the concave amount from the side 11A of the frame body 11, is 0.2 to 2.0 times the minimum width dimension W of the bridge portions 12A sandwiched between the hollow portion 13A and the hollow portion 13B. . Here, if the maximum notch dimension C of the notch portion 14A is 0.2 times or more the minimum width dimension W of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B, it occurs between the sides 11A of the frame body 11 . It is favorable from the viewpoint that thermal strain will moderate. In addition, if the maximum notch dimension C of the notch portion 14A is 2.0 times or less the minimum width dimension W of the bridge portion 12A sandwiched between the hollow portion 13A and the hollow portion 13B, the It is advantageous that the concentration of mechanical and thermal stress in the bridging portion 12A between 13B is dispersed.

Similarly, it is preferable that the maximum notch dimension of notch part 14B is 0.2 to 2.0 times the minimum width dimension W of bridge part 12A sandwiched between hollow part 13A and hollow part 13B. Further, the maximum notch size of the notch portion 14C and the maximum notch size of the notch portion 14D are preferably 0.2 to 2.0 times the minimum width dimension of the bridge portion 12B sandwiched between the hollow portion 13C and the hollow portion 13D.

The length dimension L of the cutout portion 14A, that is, the length dimension L of the cutout portion 14A on the side 11A of the frame body 11 is preferably 1.0 to 5.0 times the minimum width dimension W of the bridge portion 12A. Here, if the length dimension L of the cutout portion 14A is 1.0 times or more the minimum width dimension W of the bridge portion 12A, it is advantageous that the mechanical and thermal stress concentration on the cutout portion 14A is dispersed. In addition, if the length dimension L of the notch portion 14A is 5.0 times or less than the minimum width dimension W of the bridge portion 12A, it is advantageous to reduce the thermal strain occurring on the side 11A of the frame body 11 . Moreover, it is preferable that the length dimension of the notch part 14B is 1.0-5.0 times of the minimum width dimension W of the bridge part 12A. Here, the outer peripheral portion of the hollow portion 13A opposite to the notch portion 14A is formed with a convex curve facing each other, thereby enabling the two opposite properties of stress dispersion and temperature distribution width reduction to be compatible. The effect is further improved. to play. Moreover, it is also preferable that the length dimension of the notch parts 14C and 14D is 1.0 to 5.0 times the minimum width dimension W of the bridge part 12B, respectively.

Furthermore, the cutout portion 14 has an arc-shaped portion. Here, when the cutout portion 14A is arc-shaped, the radius of the cutout portion 14A is preferably 0.5 to 2.50 times the minimum width dimension W of the bridge portion 12A. When the radius of the notch portion 14A is 0.5 times or more the minimum width dimension W of the bridge portion 12A, thermal strain generated by the notch portion 14A is dispersed and peeling resistance is improved. In addition, if the radius of the notch portion 14A is 2.5 times or less the minimum width dimension W of the bridge portion 12A, it is advantageous in that the mechanical and thermal stress generated on the side 11A of the frame body 11 is dispersed. Moreover, it is preferable that the radius of the notch part 14B is 0.5-2.50 times of the minimum width dimension W of bridging part 12A. Furthermore, the radius of the notches 14C and 14D is preferably 0.75 to 2.50 times the minimum width dimension W of the bridge portion 12B, more preferably 0.8 to 2.40 times.

In addition, the shape of the notch part 14 is not limited to the arc shape shown in FIG. 1, as long as it is a shape which can be combined into a curve, for example, the shape which combined a plurality of elliptical shapes may be sufficient.

The sintering jig 10 having the above-mentioned structure is used to pressurize powder or clay refractory material into a metal mold (not shown), so-called press molding; or pour it into a plaster mold to solidify it, so-called formed by injection molding, etc. For example, refractories are mainly composed of alumina, mullite, zirconia, magnesia, cordierite, spinel, silicon carbide, silicon nitride, aluminum nitride, boron carbide, and mixtures of these, as long as they are acceptable. For example, a material resistant to a high temperature of 1,200°C or higher, preferably 1,300°C or higher, and more preferably 1,500°C or higher may be sufficient.

Regarding the sintering jig 10 of the present embodiment described above, the sintering jig of Examples 1 to 6 and the sintering jig of Comparative Examples 1 and 2 were subjected to a furnace placement test and a peeling resistance evaluation test. The structures of Examples 1 to 5 are shown in FIGS. 6 to 8 . In addition, since the structure of the sintering jig of Example 6 is the same as that of the sintering jig of Example 1 except for the material and the thickness dimension T of the bridging portion 12A, the drawings are omitted. In addition, the structure of the sintering jig of Comparative Examples 1 and 2 is shown in FIG. 9 . About the structure of the sintering jig of Examples 1-6 and Comparative Examples 1 and 2, since the same code|symbol as the structure of the sintering jig 10 of this embodiment mentioned above is attached|subjected, description is abbreviate|omitted.

Specifically, in Examples 1 to 5 and Comparative Examples 1 and 2, coarse-grained mullite (average particle size: about 70 μm), fine-particle alumina (average particle size D ₅₀ : 3 μm), and fine-particle silica (average particle size: 3 μm) were mixed The raw material powder and the organic binder (polyvinyl alcohol, methyl cellulose, dextrin, etc.) having a particle size D ₅₀ : 5 μm) were used at a high speed so that the content of Al ₂ O ₃ : 78 mass % and SiO ₂ : 22 mass % The mixer stirs and mixes to produce a stirred mixture. The kneaded mixture obtained above was subjected to uniaxial press-molding, thereby molding into the shapes shown in FIGS. 6 to 8 and 9 , respectively, to obtain a molded body. Then, these molded bodies were sintered in the atmosphere (attainment temperature: 1700° C., holding time: 8 hours) to obtain sintered bodies, from which sintering jigs of Examples 1 to 5 and Comparative Examples 1 and 2 were produced. . Similarly, in Example 6, raw material powders of coarse-grained alumina (average particle size: about 70 μm), fine-grained alumina (average particle size D ₅₀ : 35 μm), and fine-grained silica (average particle size D ₅₀ : 5 μm) were prepared The organic binder (polyvinyl alcohol, methyl cellulose, dextrin, etc.) is stirred and mixed using a high-speed mixer so as to be Al ₂ O ₃ : 95 mass % and SiO ₂ : 5 mass %, and uniaxially added. Press molding (refer to FIG. 6( a )) and sintering in the atmosphere were carried out, whereby the sintering jig of Example 6 was produced. Here, the apparent porosity (based on JISR2205:1902) of the above-mentioned sintered body was 21% in Examples 1 to 5 and Comparative Examples 1 and 2, and 20% in Example 6.

<In-furnace placement test> The furnace placement test was carried out as follows. On the entire surface of a sintering jig with a horizontal length (290mm×120mm), two pieces of 115mm×115mm size pseudo workpieces (ceramic plates) were placed side by side so as to obtain an equal load of 600g/sintering jig. The sintering jig is placed in the electric furnace in a state where the sintering jig is laminated in three stages. Then, the heat treatment of heating the inside of the electric furnace to the maximum temperature of 1,400° C., maintaining it for 3 hours, and cooling to normal temperature is performed. Here, the investigation of cracks was carried out by the tester's eyes. On the other hand, the deformation was calculated by using the difference between the imaginary lines formed by connecting the corners on the diagonal lines of the frame body of the sintering jig as the deflection amount. Then, when the deflection amount was 0.3 mm or more, it was defined as "deformed". Moreover, you may calculate as a deflection amount the difference between the imaginary line which connects the corner part and the center part on the diagonal line of the frame body of a sintering jig.

Table 1 Sintering fixture Furnace placement test Refractory material Bridge Department A pair of notches D/W C/W W/T L/W cracked deformation Example 1 Mullite Have Have 1.0 0.7 7 2.5 none none Example 2 Mullite Have Have 0.5 0.7 7 2.5 none none Example 3 Mullite Have Have 1.2 0.7 7 2.5 none none Example 4 Mullite Have Have 1.2 0.2 7 2.5 none none Example 5 Mullite Have Have 0.6 1.3 7 2.5 none none Example 6 Alumina Have Have 1.0 0.7 3 2.5 none none Comparative Example 1 Mullite none none - - 3.8 - Have Have Comparative Example 2 Mullite Have none - - 3.8 - Have none

Here, “D/W” in Table 1 represents the minimum distance D of the bridge portion 12 formed between the cutout portion 14 and the hollow portion 13 with respect to the minimum distance D of the bridge portion 12 sandwiched between the plurality of hollow portions 13 The magnification of the width dimension W. "C/W" represents a ratio of the maximum notch dimension C of the notch portion 14A to the minimum width dimension W of the bridge portion 12A sandwiched between the plurality of hollow portions 13A and 13B. “W/T” means the ratio of the minimum width dimension W of the bridge part 12 sandwiched between the plurality of hollow parts of the bridge part 12 to the thickness dimension T of the bridge part 12 . "L/W" represents the ratio of the length dimension L of the notch portion 14A to the minimum width dimension W of the bridge portion 12A. In addition, in Comparative Examples 1 and 2, as shown in FIG. 11, since the notch part 14 was not formed, the "D/W", "C/W" and "L/W" fields were left blank.

From the results of the furnace placement test shown in Table 1, the sintering jigs of Examples 1 to 6 were provided with the notches 14, and no cracks or deformation were observed. On the other hand, in the sintered cures of Comparative Examples 1 and 2, cracks were confirmed.

<Peeling resistance evaluation test> On the entire surface of the horizontally long (290mm×120mm) sintered jig, two pieces of 115mm×115mm size of the pseudo workpiece (ceramic Plates) are placed side by side to form a sintering jig (hereinafter referred to as a sintering group), and the sintering jig is transported from a room temperature state (T ₀ =25°C) to a predetermined temperature (T ₁ ) in a state where the sintering jig is stacked in three stages. ) in the electric furnace for 1 hour. After keeping the sintered group in the electric heating furnace for 1 hour, then taking it out of the electric heating furnace, and cooling it to room temperature (T ₀ =25°C) again, the presence or absence of abrupt temperature generated in the cooling step was investigated. Cracks in the sintered jig caused by changes. The presence or absence of cracks was visually checked by the tester. Here, the predetermined temperature (T ₁ ) of the electric heating furnace means that 275° C. is set as the starting temperature, and the temperature in the electric heating furnace is increased by 25° C. each time and the above-mentioned cooling step is performed as long as the sintering jig is not cracked. temperature inside the electric furnace. Then, the peeling resistance evaluation test was terminated when the cracking occurred in the sintered jig.

The evaluation of cracks is as follows. Here, ΔT refers to the temperature difference ₍ ΔT ₌ The upper limit of T ₁ - T ₀ ). ◎(best): ΔT≧475[℃] ○(best): 425＜ΔT≦475[℃] △(good): 400＜ΔT≦425[℃] ×(not good): ΔT＜400[℃]

Table 2 Sintering fixture Peeling Resistance Evaluation Refractory material Bridge Department A pair of notches D/W C/W W/T L/W ΔT[°C] Evaluation Example 1 Mullite Have Have 1.0 0.7 7 2.5 500 ◎ Example 2 Mullite Have Have 0.5 0.7 7 2.5 400 △ Example 3 Mullite Have Have 1.2 0.7 7 2.5 450 ○ Example 4 Mullite Have Have 1.2 0.2 7 2.5 425 ○ Example 5 Mullite Have Have 0.6 1.3 7 2.5 400 △ Example 6 Alumina Have Have 1.0 0.7 3 2.5 500 ◎ Comparative Example 1 Mullite none none - - 3.8 - 250 × Comparative Example 2 Mullite Have none - - 3.8 - 300 ×

From the results of the peeling resistance evaluation test shown in Table 2, all the sintered jigs of Examples 1 to 6 were found to have no cracks until ΔT=400°C, so the peeling resistance was evaluated as good. Since the sintering jigs of Examples 1 to 6 have excellent peeling resistance as described above, they can be quickly cooled after being taken out from the electric heating furnace, and the products can be taken out in a short time. Thereby, since the assembling operation and the disassembling operation of the sintering jig can be accelerated, the sintering process can be accelerated. On the other hand, in the sintered jigs of Comparative Examples 1 and 2, cracks were observed even at a relatively low temperature, so the peeling resistance was evaluated as unsatisfactory.

In the sintering jig 10 of the present embodiment described above, the sintering process is carried out by placing the object to be sintered X as described below.

As shown in FIG. 10 , the bracket 20 is placed on the surface of the sintering jig 10 of the present embodiment, and the sintered object X is placed on the upper surface 21 of the bracket 20, and is placed in a sintering furnace (not shown). , so that the sintered object X is sintered.

In addition, the bracket 20 is formed of a refractory with high air permeability. Since the bracket 20 has high air permeability, the hot air in the sintering furnace can easily pass through the bracket 20 and reach the lower surface side of the sintered object X, so that the sintered object X can be sintered efficiently. As a refractory with high air permeability, there is a porous plate shape in which many pores are formed.

Here, in the sintering jig 10 of the present embodiment, by forming the plurality of hollow parts 13, the hot air in the sintering furnace can more easily pass through the bracket 20 and reach the lower surface side of the sintered object X, so that the efficiency can be improved. The sintering of the sintered object X is carried out.

Furthermore, as shown in FIG. 11 , a plurality of sintering jigs 10 on which the sintered object X is placed can be in a state of being stacked. In FIG. 11, although the sintering jig 10 is laminated|stacked in 3 stages, it is not limited to this, It may be 2 stages, or 4 stages, or more. In this way, since the sintering jig 10 is in a state in which a plurality of stages are stacked, more sintered objects X can be sintered at one time than in the case of one stage.

The inventions disclosed in this specification include those formed by changing some of the structures disclosed in the present specification to those specified in the other structures disclosed in the present specification within the applicable range, or adding these structures in addition to the structures of the respective inventions or the embodiments. Other structures disclosed in the present specification are specified, or those specified by partial structures are eliminated to the extent that some functions and effects can be obtained, and are conceptualized at a higher level.

The bridge portion 12 of the sintering jig 10 of the present embodiment is provided continuously from the side 11A of the frame body 11 toward the side 11B, and is provided continuously with the frame body 11 , but is not limited to this, and may be directed from the side 11C of the frame body 11 to the side 11D , which is arranged continuously with the frame body 11 . That is, the bridge portion 12 may be provided in a cross shape, or the hollow portion 13 may be provided in a shape that intersects with each other. By forming the bridge portion 12 into a cross shape, when the bracket 20 is placed on the sintering jig 10, the bracket 20 can be supported in a more stable state.

10: Sintering fixture 11: Frame 11A, 11B, 11C, 11D: Side 12, 12A, 12B: Bridge section 13, 13A, 13B, 13C, 13D: hollow part 14, 14A, 14B, 14C, 14D: Cutout 15: Side 1 16: Support part 17: Side 2 18: Acceptance Department 20: Bracket X: Sintered

Fig. 1 is a plan view of a sintering jig according to an embodiment of the present invention. Fig. 2 is a front view of the sintering jig according to the embodiment of the present invention. Fig. 3 is a right side view of the sintering jig according to the embodiment of the present invention. Fig. 4 is a cross-sectional view taken along the line A-A of the sintering jig according to the embodiment of the present invention shown in Fig. 1 . FIG. 5 is a partial enlarged view of the sintering jig according to the embodiment of the present invention shown in FIG. 1 . Fig. 6 (a) is a plan view of Example 1 of the sintering jig according to the embodiment of the present invention, and (b) is a plan view of Example 2 of the sintering jig according to the embodiment of the present invention. Fig. 7(a) is a plan view of Example 3 of the sintering jig according to the embodiment of the present invention, and (b) is a plan view of Example 4 of the sintering jig according to the embodiment of the present invention. Fig. 8 is a plan view of Example 5 of the sintering jig according to the embodiment of the present invention. 9(a) is a plan view of Comparative Example 1 of the sintering jig according to the embodiment of the present invention, and (b) is a plan view of Comparative Example 2 of the sintering jig according to the embodiment of the present invention. 10 is a front view showing a state in which a sintered object is placed on the sintering jig according to the embodiment of the present invention. FIG. 11 is a front view showing a state in which the sintering jig according to the embodiment of the present invention is laminated.

none.

10: Sintering fixture

11: Frame

11A, 11B, 11C, 11D: Side

12A, 12B: Bridge section

13A, 13B, 13C, 13D: hollow part

14, 14A, 14B, 14C: Cutout

17: Side 2

18: Acceptance Department

Claims (7)

A sintering fixture is characterized in that it has: a frame body, which is provided with a plurality of hollow parts and a bridge part erected on the hollow parts; The bridging portion extends toward the outer peripheral edge of the frame body, and at least a portion of the outer peripheral edge of the frame body that intersects is formed with a notch portion. The sintering jig according to claim 1, wherein the notch portions are provided in a pair. The sintering jig according to claim 1 or 2, wherein the shortest distance of the bridge portion formed between the cutout portion and the hollow portion is the smallest distance between the bridge portions sandwiched between the plurality of hollow portions 0.5 to 1.2 times the width. The sintering jig according to claim 3 is characterized in that the shape of the hollow portion is formed to ensure the shortest distance of the bridge portion. The sintering jig according to any one of claims 1 to 4, characterized in that the maximum notch size of the notch portion from the outer periphery of the frame body is the minimum width of the bridge portion sandwiched between the plurality of hollow portions 0.2 to 2.0 times the size. The sintering jig according to any one of claims 1 to 5, wherein the cutout portion has an arc-shaped portion. The sintering jig according to any one of claims 1 to 6, characterized in that it has: a support portion, which is formed on the first surface of the frame body and supports the frame body; A receiving portion, which is formed on the second surface of the frame body, is used to receive the support portion of the frame body placed in the vertical direction when another frame body is stacked.

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