JP2002105507A - Electric pressure-sintering apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric pressure-sintering apparatus whose structure can be made simple and compact, and with which the facility cost can be lowered, the cycle time of sintering work is shortened automation is possible, and the working efficiency is excellent. SOLUTION: This electric pressure-sintering apparatus 1 having a pair of sintering shafts for pressure-sintering sintering dies 80 with powder (m) for sintering filled therein in the vertical direction and a vacuum chamber 2 for sealing the sintering dies 80 further comprises: a rotary table 5 which is rotatable in the horizontal plane in the vacuum chamber 2 with a circumferential edge part thereof passing between a pair of sintering shafts; a die holding part 60 which is provided on the circumferential edge part of the rotary table 5 for holding the sintering dies 80 held between the pair of sintering shafts; and a pair of preheating shafts which are provided above and below the position for holding the sintering dies 80 held by the die holding part 60 in the vertical direction, behind the sintering shafts in the rotational direction of the rotary table 5 for preheating the sintering dies 80.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an electric pressure sintering apparatus. More specifically, current-pressing sintering in which a sintering mold in which metal or ceramics or other powder to be sintered is placed is energized while applying pressure, and the energization causes the sintering mold to generate heat and sinter the powder to be sintered. Related to the device.

[0002]

2. Description of the Related Art FIG. 6 is a schematic explanatory view of a conventional electric pressure sintering apparatus. As shown in the figure, the conventional electric pressure sintering apparatus 101 has a tunnel-like structure, and is electrically pressurized by a mold loading gate 201 and a mold unloading gate 204 provided at the entrance and the exit thereof so as to be openable and closable. The inside of the sintering apparatus 101 is hermetically sealed from the outside. Also, mold loading gates 201 and 2
The space between 04 is divided into three spaces by a sintering chamber loading gate 202 and a cooling chamber loading gate 203. Each space consists of a preheating chamber 130, a sintering chamber,
120 and a cooling chamber 140.

A preheating chamber 130 is a space for preheating the powder m to be sintered. The sintering chamber 120 is a space for sintering the preheated powder m to be sintered. The cooling chamber 140 is a space for cooling the sintered powder m to be sintered.

A preheating chamber 130, a sintering chamber 120 and a cooling chamber 140
Are provided with roller tables 210 to 213 for carrying the sintering die 80 thereon. On the roller tables 210 to 213, a plurality of cylindrical rollers are horizontally arranged. For this reason, the sintering mold 80 is
If the rollers are rolled while placed on rollers 210 to 213, the sintering mold 80 moves on the rollers. Therefore, the sintering mold 80 is moved by the roller tables 210 to 213 to the preheating chamber 130.
→ Sintering chamber 120 → Cooling chamber 140

Next, an operation of continuously sintering a plurality of powders m to be sintered by a conventional electric pressure sintering apparatus will be described. As shown in FIG. 6, in the case of continuously sintering the powder to be sintered m, in order to shorten the sintering cycle time, the sintering is performed in the preheating chamber 130, the sintering chamber 120, and the cooling chamber 140. Each of the molds 80 is housed, and preheating, sintering, and cooling operations are performed simultaneously. At this time, each chamber is kept in a vacuum. From this state, the following operation is required to carry the new sintered mold 80 into the preheating chamber 130.

First, the inside of the cooling chamber 140 is returned to the atmospheric pressure, the mold discharge gate 204 is opened, and the sintered mold 80 is discharged from the cooling chamber 140.

Next, the mold discharge gate 204 is closed and the cooling chamber is closed.
140 is evacuated (first time), the cooling chamber entrance gate 203 is opened, and the sintering chamber 120 is opened by the roller tables 212 and 213.
Then, the sintering mold 80 is transferred to the cooling chamber 140, and the cooling chamber entrance gate 203 is closed.

Next, the sintering chamber entrance gate 202 is opened, the sintering mold 80 is transported from the preheating chamber 130 to the sintering chamber 120 by the roller table 211, and the sintering chamber entrance gate 202 is closed.

Then, the inside of the preheating chamber 130 is set to the atmospheric pressure, the mold loading gate 201 is opened, the sintering mold 80 is loaded into the preheating chamber 130, and the mold loading gate 201 is closed. Finally, preheating chamber 130
When the inside is evacuated (second time), the loading of the new sintering mold 80 is completed.

When the loading of the new sintering mold 80 is completed, the preheating chamber 130, the cooling chamber 140, and the sintering chamber 120 perform preheating,
Sintering and cooling work are performed simultaneously.

By repeating the above operation, a sintered product can be manufactured continuously.

[0012]

However, the conventional electric current pressure sintering apparatus 101 is provided with a preheating chamber 130, a sintering chamber 120 and a cooling chamber 140 for each of preheating, sintering and cooling steps. Multiple gates 20 to separate each room
1 to 204 are required. For this reason, there is a problem that the structure of the apparatus becomes complicated and large, and the gates 201 to 204 are expensive, so that the current-pressure sintering apparatus 101 becomes expensive. Further, the preheating chamber 13 is controlled by the roller tables 210 to 213.
Since the sintering die 80 is transported in the order of 0 → sintering chamber 120 → cooling chamber 140, there is a problem that the transport distance becomes long and the sintering die 80 takes time to move. Furthermore, when continuously manufacturing a sintered product, the vacuuming operation must be performed twice in order to carry in one powder to be sintered m. Since evacuation takes time, there is a problem that the cycle time per sintered product cannot be shortened. Further, the work of carrying the sintering mold 80 into the preheating chamber 130 and the work of carrying out the sintering mold 80 from the cooling chamber 140 are performed manually, but each time one powder m to be sintered is sintered,
One sintering mold 80 is unloaded from the cooling chamber 140 and
One sintering die 80 must be carried in. For this reason, a person always enters the mold loading gate 201 and the sintering chamber loading gate 202.
There is a problem that it is necessary to wait for the first time, and it takes time and effort.

The present invention has been made in view of the above-mentioned circumstances, and the structure of the apparatus can be made simple and compact.
It is an object of the present invention to provide a current-pressing sintering apparatus which can shorten the cycle time per sintered product, can be automated, and has good working efficiency.

[0014]

According to a first aspect of the present invention, there is provided an electric current pressure sintering apparatus comprising: a pair of sintering shafts for vertically sintering a sintering mold containing powder to be sintered; An electric current pressure sintering apparatus including a vacuum chamber for sealing a sintering mold, wherein the apparatus is rotatably provided in a horizontal plane in the vacuum chamber, and a peripheral portion is provided between the pair of sintering shafts. A rotary table through which the rotary table passes, a die holding portion provided at a peripheral portion of the rotary table, for holding a sintering die sandwiched between the pair of sintering shafts, and rotation of the rotary table more than the sintering shaft. At the rear in the direction, the sintering die held by the holding part is provided above and below a position vertically sandwiching the sintering die, and is constituted by a pair of preheating shafts for preheating the sintering die. According to a second aspect of the present invention, there is provided the electric pressure sintering apparatus according to the first aspect, wherein the mold holding unit is provided at a plurality of locations along a peripheral edge of the rotary table.

According to the first aspect of the invention, by rotating the rotary table, the sintering die held by the die holding portion can be moved from the preheating position to the sintering position. For this reason, the moving distance of the sintering mold is shortened, and the moving time of the sintering mold can be shortened. In addition, since one preheating shaft and a sintering shaft are housed in one vacuum chamber,
One vacuum chamber may be evacuated once for each sintered product. Therefore, the time for performing the evacuation is shortened, and the cycle time per sintered product can be shortened. Furthermore, since there is only one vacuum chamber, there is no need to provide a plurality of gates, so that the structure of the apparatus can be simplified and compact, and equipment costs can be reduced. Claim 2
According to the invention, if a plurality of sintering dies are placed on the plurality of mold holding portions of the rotary table at a time, the plurality of sintering dies are sequentially rotated from the preheating position to the sintering position only by rotating the rotary table. Since it can be sent, the operation until the sintering of all the powders to be sintered is completed can be automated. Therefore, it is not necessary to take the sintering molds in and out of the vacuum chamber one by one, so that no manual operation is required. If a plurality of sintering dies are carried into one vacuum chamber and the vacuum chamber is evacuated only once, all sintering dies can be sintered. Therefore, the work efficiency is improved, and the cycle time per sintered product can be reduced.

[0016]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic explanatory view of a vacuum chamber 2 of an electric pressure sintering apparatus 1 of the present embodiment. FIG. 2 is a schematic explanatory view of the preheating unit 30 of the current-pressing sintering apparatus 1 of the present embodiment. FIG. 3 is a schematic plan view of the electric pressure sintering apparatus 1 of the present embodiment. FIG. 4 is a sectional view taken along the line III-III in FIG. As shown in FIGS. 1 to 4, the current-pressure sintering apparatus 1 of the present embodiment includes a vacuum chamber 2, a sintering unit 20, a preheating unit 30, a rotary table 5, and a mold holding unit 60.

First, the sintering section 20 will be described. In FIG. 1, reference numeral 21 indicates a main body of the sintered part 20. The main body 21 has a substantially U-shape in a side view, and includes a pair of upper and lower bases 21a and 21b. On the upper surface of the lower base 21b, a hydraulic cylinder 29 is provided with its piston rod vertically upward.

The upper end of an upper pressure electrode shaft 26 is fixed vertically downward to the lower surface of the upper base 21a of the main body 21. Below the upper pressurizing electrode shaft 26, a lower pressurizing electrode shaft 27 is provided vertically upward so that the axis of the upper pressurizing electrode shaft 26 coincides with the axial center. The lower end of the lower pressure electrode shaft 27 is attached to a piston rod of the hydraulic cylinder 29. For this reason, the hydraulic cylinder 29
The lower pressure electrode shaft 27 can be moved up and down with respect to the lower base 21b of the main body 21 together with the vacuum chamber 2 described later. Therefore, if the lower pressurizing electrode shaft 27 is raised by the hydraulic cylinder 29, pressurization can be performed with the sintering mold 80 interposed between the pair of upper and lower pressurizing electrode shafts 26, 27.

The sintering die 80 comprises a mold 81 and a pair of upper and lower dies 82 and 83.
The mold 81 is formed in a cylindrical shape having a hollow portion. Each of the dies 82 and 83 is formed in a cylindrical shape having the same diameter as the hollow portion of the mold 81. Therefore, a pair of upper and lower dies 8 are formed in the hollow portion of the mold 81.
The powder m ₂ such as copper (Cu), nickel (Ni), and alumina (Al ₂ O ₃ ) can be hermetically accommodated.

The material of the pair of upper and lower pressure electrode shafts 26 and 27 is electrically conductive and has high strength, for example, graphite or tungsten carbide. Therefore, if the positive and negative electrodes of a DC power supply (not shown) are connected to the pair of upper and lower pressurizing electrode shafts 26 and 27, electricity can be supplied between the pair of upper and lower pressurizing electrode shafts 26 and 27. The pair of upper pressure electrode shafts 26 and lower pressure electrode shafts 27 are a pair of upper and lower sintered shafts described in the claims.

The material of the pair of upper and lower pressurizing electrode shafts 26 and 27 is not limited to graphite or tungsten carbide as long as it has electrical conductivity and high strength.

Therefore, according to the sintering section 20, the sintering mold 8 is formed by the upper pressing electrode shaft 26 and the lower pressing electrode shaft 27.
0 can be energized under pressure.

Next, the vacuum chamber 2 will be described. FIG.
As shown in FIG. 2, a vacuum chamber 2 is provided between a pair of upper and lower bases 21a and 21b of a main body 21 of the sintered portion 20. This vacuum chamber 2
It is a cylindrical closed container, which is basically composed of a side wall 2a, an upper plate 2b and a lower plate 2c. Lower plate 2c
Is a flat plate, through which the lower pressure electrode shaft 27 penetrates. The lower plate 2c is air-tightly fixed to the outer periphery of the lower pressure electrode shaft 27. The lower plate 2c is penetrated by a rotating shaft 6 to be described later, and is slidably and rotatably mounted in an airtight manner. The lower end of the side wall 2a is hermetically attached to the upper surface of the lower plate 2c. The side wall 2a has a cylindrical shape and is provided so as to surround the side of the sintering mold 80. The side wall 2a is provided with a carry-in gate 2h for carrying the sintering die 80 in and out. The lower surface of the upper plate 2b is hermetically attached to the upper end of the side wall 2a. The upper plate 2b is a flat plate, and the upper pressure electrode shaft 26 passes through the center thereof. The upper plate 2b is air-tightly and slidably attached to the outer periphery of the upper pressure electrode shaft 26. Therefore, when the lower pressure electrode shaft 27 is pushed up, the vacuum chamber 2 is pushed up together with the lower pressure electrode shaft 27.

The vacuum chamber 2 is connected to a vacuum pump (not shown), and the inside of the vacuum chamber 2 can be evacuated by the vacuum pump.

In the current-pressure sintering apparatus 1 of this embodiment, not only the sintering shaft but also the mold holder 60
And a preheating shaft 35. Therefore, the rotary table 5, the mold holding unit 60, and the preheating shaft will be described.

First, the support structure of the rotary table 5 will be described. A bearing 7 is fixed to a machine frame (not shown). The rotating shaft 6 is rotatably attached to the bearing 7 with the rotating shaft 6 standing upright. As described above, the rotating shaft 6 penetrates the lower plate 2c of the vacuum chamber 2, and is slidably and rotatably mounted in an airtight manner. A gear is attached to the lower end of the rotating shaft 6, and the gear meshes with a gear attached to the main shaft of the motor M.

A rotary table 5 on a disk is attached to the upper end of the rotary shaft 6 at the center of the lower surface.
The rotary table 5 is provided horizontally, and its peripheral portion is provided between the pair of upper and lower pressure electrode shafts 26 and 27.

Next, the mold holding section 60 will be described. A mold holding unit 60 is provided at a peripheral portion of the rotary table 5. A plurality of mold holding portions 60 are provided along the peripheral edge of the rotary table 5 at, for example, equal angular intervals. For this reason, when the motor M is driven, the rotating shaft 6 is rotated, and the rotary table 5 is rotated in a horizontal plane, each mold holding portion 60 of the rotary table 5 is moved by the pair of upper and lower pressing electrode shafts 26, 27. It passes between the two. Note that the mold holding units 60 need not be provided at equal angular intervals.

The mold holder 60 is provided with a through hole 61 penetrating the upper and lower surfaces of the rotary table 5. The through hole 61 has an inner diameter larger than the outer shape of the die 83 of the sintered mold 80 and smaller than the outer shape of the mold 81. An enlarged diameter portion 62 whose inner diameter is slightly larger than the outer diameter of the mold 81 is provided at the upper end of the through hole 61. For this reason, when the sintered mold 80 is placed on the mold holding section 60, the mold 81 is held by the enlarged diameter section 62 with the die 83 inserted in the through hole 61.

Next, the preheating unit 30 will be described. As shown in FIG. 3, the preheating unit 30 is provided behind the sintering unit 20 in the rotation direction of the rotary table 5. That is, if the rotation direction of the rotary table 5 is opposite to the arrow in the figure, the position of the preheating unit 30 with respect to the sintering unit 20 is opposite to the figure.

In FIG. 2, reference numeral 31 denotes the main body of the preheating unit 30. The main body 31 has a substantially U-shape in side view, and is provided so as to sandwich the vacuum chamber 2 between an upper base 31a and a lower base 31b. On the upper surface of the lower base 31b, a hydraulic cylinder 39 is provided with its piston rod vertically upward.

The upper end of an upper preheating electrode shaft 36 is fixed vertically downward to the lower surface of the upper base 31a of the main body 31. The lower end of the upper preheating electrode shaft 36 is inserted into the vacuum chamber 2, and the outer peripheral surface thereof is air-tightly and slidably attached to the upper plate 2 b of the vacuum chamber 2. In the vacuum chamber 2, the upper preheating electrode shaft 3
The lower end of 6 is provided above the rotary table 5.

The lower preheating electrode shaft 3 is positioned below the upper preheating electrode shaft 36 such that the axis of the lower preheating electrode shaft 36 coincides with that of the upper preheating electrode shaft 36.
The lower end of 7 is provided vertically upward. The lower preheating electrode shaft 37 has an upper end inserted into the inside of the vacuum chamber 2, and an outer peripheral surface thereof is air-tightly fixed to the lower plate 2 c of the vacuum chamber 2. In the vacuum chamber 2, the upper end of the lower preheating electrode shaft 37 is connected to the rotary table 5.
It is provided below. The lower end of the lower preheating electrode shaft 37 is attached to a piston rod of the hydraulic cylinder 39. For this reason, the lower preheating electrode shaft 37 is
It can move up and down freely with respect to one lower base 31b.

The pair of upper and lower preheating electrode shafts 36 and 37 are a pair of upper and lower preheating shafts described in the claims. The distance between the center of the pair of upper and lower preheating electrode shafts 36 and 37 to the center of rotation of the rotary table 5 is
A pair of upper and lower pressurized electrode shafts 2 which are sintering shafts of the sintering section 20
It is provided at a position having the same length as the distance from the center of the shafts 6 and 27 to the center of rotation of the rotary table 5.
Therefore, the sintering die 80 held by the die holding part 60 of the rotary table 5 is located above and below the position where it is vertically sandwiched.

The material of the pair of upper and lower preheating electrode shafts 36 and 37 is electrically conductive and high in strength, for example, graphite or tungsten carbide. Therefore, if a positive electrode and a negative electrode of a DC power supply (not shown) are connected to the pair of upper and lower preheating electrode shafts 36 and 37, respectively,
Electric current can be supplied between 6, 37.

Therefore, according to the preheating unit 30, the sintering mold 8 is formed by the upper preheating electrode shaft 36 and the lower preheating electrode shaft 37.
0 can be preheated.

The material of the pair of upper and lower preheating electrode shafts 36 and 37 is not limited to graphite or tungsten carbide, as long as it has electrical conductivity and high strength.

As described above, according to the current-pressure sintering apparatus 1 of the present embodiment, the upper and lower pressing electrode shafts 36 and 37 serving as the sintering shaft and the upper and lower pressing shafts serving as the preheating shaft are accommodated in one vacuum chamber 2. Since the preheating electrode shafts 36 and 37 are housed, there is no need to provide a plurality of gates, so that the structure of the apparatus can be simplified and compact, and equipment costs can be reduced.

Next, the current-pressure sintering apparatus 1 of this embodiment
The function and effect of will be described. FIG. 5 is a flowchart of a process of sintering the powder m to be sintered by the current-pressure sintering apparatus 1 of the present embodiment. As shown in the figure, first, the entrance gate 2h of the vacuum chamber 2 is opened, and while rotating the rotary table 5, each mold holding portion 60 of the rotary table 5 is rotated.
Each of the sintering molds 80 is placed on each of them and held.

Next, the loading gate 2h is tightened, and the inside of the vacuum chamber 2 is evacuated by a vacuum pump. Then, the motor M is operated to rotate the rotary table 5 so that the sintering die 80 on the die holder 60 is removed. A pair of upper and lower preheating electrode shafts 36, 3
Move between 7

Next, when the lower preheating electrode shaft 37 is raised, the upper end of the lower preheating electrode shaft 37 is
1 and hits the lower end of the die 83 of the sintering die 80 and pushes up the sintering die 80. Furthermore, the lower preheating electrode shaft 3
7 rises with the sintering die 80 placed on its upper end, so that the upper end of the die 82 of the sintering die 80 eventually hits the lower end of the upper preheating electrode shaft 36, and the sintering die 80 becomes a pair of upper and lower preheating electrode shafts. It is sandwiched between 36 and 37. In this state, when a current is applied to the pair of upper and lower preheating electrode shafts 36 and 37, the sintering mold 80 generates heat, the temperature rises, and the powder m to be sintered is preheated. Then
Impurities such as a lubricant contained in the powder to be sintered m in the sintering mold 80 can be removed.

When the preheating is completed, the lower preheating electrode shaft 37 is lowered, and the upper end of the lower preheating electrode shaft 37 is pulled out of the through hole 61 of the mold holder 60. Next, the motor M is operated again to move the preheated sintering die 80 between the pair of upper and lower pressing electrode shafts 26 and 27 of the sintering unit 20. Since the mold holding portions 60 are provided at equal angular intervals on the periphery of the rotary table 5, a new sintering die 80 is inserted between the pair of upper and lower preheating electrode shafts 36 and 37 of the preheating portion 30. 80 are supplied.

Therefore, the current-pressure sintering apparatus 1 of the present embodiment
According to the above, by rotating the rotary table 5, the sintering die 80 can be moved from the preheating position to the sintering position. For this reason, the moving time of the sintering die 80 can be shortened, and the cycle time per sintered product can be shortened.

Next, the lower preheating electrode shaft 37 of the preheating section 30 is raised, so that a new sintering die 80 can be preheated.

When the lower pressurizing electrode shaft 27 of the sintering unit 20 is raised at the same time as the lower preheating electrode shaft 37 of the preheating unit 30 is raised,
The upper end of the lower pressure electrode shaft 27 enters the through hole 61 of the mold holding unit 60, hits the lower end of the die 83 of the sintering die 80, and pushes up the sintering die 80. Then, the sintering die 80 is raised with the sintering die 80 placed on the upper end of the lower pressure electrode shaft 27, and the die 8
2 corresponds to the lower end of the upper pressing electrode shaft 26,
0 is sandwiched between the upper pressure electrode shaft 26 and the lower pressure electrode shaft 27. In this state, the dies 83 of the sintering die 80 are further pressed upward by the lower pressing electrode shaft 27 and electricity is supplied to the pair of upper and lower pressing electrode shafts 26 and 27, so that the sintering die 80 is pressed and sintered. be able to.

When the sintering and the preheating are completed, the lower preheating electrode shaft 37 and the lower pressurizing electrode shaft 27 are lowered, and the upper end of the lower pressurizing electrode shaft 27 and the upper end of the lower preheating electrode shaft 37 are moved to the mold holder 60. From the through hole 61. Then again, the motor M
Is operated, the sintered sintering mold 80 is moved to the cooling position,
The preheated sintering mold 80 is moved to the sintering position,
Are respectively moved to the preheating position.

By repeating the above operation, all the sintering molds 80 can be sintered. Finally, when the cooling of all the sintering dies 80 is completed, the inside of the vacuum chamber 2 is returned to the atmospheric pressure, and the plurality of sintering dies 80 can be taken out by opening the loading gate 2h.

Therefore, the current-pressure sintering apparatus 1 of the present embodiment
According to this, if the plurality of sintering dies 80 are placed on the plurality of mold holding portions 60 of the rotary table 5 at a time, the sintering dies 80 can be moved from the preheating position to the sintering position only by rotating the rotary table 5. It can be sent sequentially from the sintering position to the cooling position. The operation until the sintering of all the powders to be sintered is completed can be automated. Therefore, it is not necessary to put the sintering molds 80 in and out of the vacuum chamber 2 one by one, so that no manual operation is required. In addition, after the sintering mold 80 has been carried into the vacuum chamber 2, it is only necessary to perform the evacuation once, so that the work efficiency is improved and the cycle time per sintered product can be reduced. it can.

Therefore, the current-pressure sintering apparatus 1 of the present embodiment
According to this, the structure of the apparatus can be made simple and compact, the equipment cost is low, the cycle time per sintered product can be shortened, automation is possible, and the working efficiency is good. To play.

[0050]

According to the first aspect of the present invention, since the sintering die is moved by the rotary table, the moving time of the sintering die can be shortened. In addition, since the preheating shaft and the sintering shaft are housed in one vacuum chamber, only one evacuation is required, and the cycle time per sintered product can be shortened. Furthermore, since there is only one vacuum chamber, there is no need to provide a plurality of gates, so that the structure of the apparatus can be simplified and compact, and equipment costs can be reduced. According to the second aspect of the present invention, there is no need to insert and remove the sintering molds one by one from the vacuum chamber, and thus no labor is required. Further, if the vacuum chamber is evacuated only once, all the sintering dies can be sintered, so that the operation efficiency is improved and the cycle time per sintered product can be shortened.

[Brief description of the drawings]

FIG. 1 shows a sintering section 20 of an electric pressure sintering apparatus 1 according to the present embodiment.
FIG.

FIG. 2 is a diagram illustrating a preheating unit 30 of the electric pressure sintering apparatus 1 according to the present embodiment.
FIG.

FIG. 3 is a schematic plan view of an electric pressure sintering apparatus 1 of the present embodiment.

FIG. 4 is a sectional view taken along line III-III of FIG. 1;

FIG. 5 is a flowchart of a process of sintering a powder to be sintered m by the current-pressure sintering apparatus 1 of the present embodiment.

FIG. 6 is a schematic explanatory view of a conventional electric pressure sintering apparatus 101.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric current pressure sintering apparatus 2 Vacuum chamber 5 Rotary table 60 Type holding part 80 Sintering type m Sintered powder

Claims (2)

[Claims] An electric heating apparatus having a pair of sintering shafts for vertically sintering a sintering mold containing powder to be sintered and a vacuum chamber for sealing the sintering mold. A pressure sintering device, wherein the rotary table is rotatably provided in a horizontal plane in the vacuum chamber, and a rotary table having a peripheral portion passing between the pair of sintering shafts, and a rotary table provided at a peripheral portion of the rotary table. A mold holding portion for holding a sintering mold sandwiched between the pair of sintering shafts, and the sintering held by the mold holding portion behind the sintering shaft in the rotation direction of the rotary table. A current-pressing sintering apparatus comprising: a pair of preheating shafts provided above and below a position where a mold is vertically sandwiched, for preheating the sintering mold. 2. An electric pressure sintering apparatus according to claim 1, wherein said mold holding portion is provided at a plurality of positions along a peripheral portion of said rotary table.