JP2898829B2 - Method of forming disc-shaped molded body, method of producing disc-shaped molded body, and combination of molding tools used therein - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a disk-shaped preform by uniaxially pressing a disk-shaped preform made of ceramic powder or the like, and to a combination of molding tools used therefor.

[0002]

2. Description of the Related Art The present applicant has disclosed a ceramic heater in which a resistance heating element made of a high melting point metal is embedded in a disc-shaped ceramic substrate in Japanese Patent Application Laid-Open No. 4-104494. In this ceramic heater,
It is necessary to obtain an airtight disk-shaped ceramic substrate made of silicon nitride, aluminum nitride, or the like. A metal wire or a metal film, which is a resistance heating element, is embedded inside the disc-shaped ceramic substrate in a spiral or spiral shape as viewed in plan.
In order to manufacture such a ceramic heater, a metal wire is buried in a ceramic powder, and this is uniaxially pressed to obtain a disk-shaped preform. If the preformed body is degreased and fired as it is, a gas-tight ceramic substrate cannot be obtained, and oxygen and corrosive gas penetrate into the substrate to oxidize and break the metal wire. For this reason, it is necessary to form the disc-shaped preform further densely.

[0003] In general, in uniaxial pressure molding by a press machine, the capacity of the apparatus is limited, and several tons / ton for large products.
It is impossible to apply a high pressure of the order of cm ² . Since the above-mentioned ceramic heater is used for heating, for example, 6-inch and 8-inch wafers, the surface area to be pressed is large, and this method cannot obtain a sufficiently high-density compact.

[0004] As a high-density molding method of ceramics, a low-temperature isostatic consolidation molding (CIP: cold isostatic press molding) method is known. In the CIP, a ceramic powder is put in a rubber bag, and the bag is put into a pressure transmitting liquid (pure viscous liquid), and the pressure transmitting liquid is compressed, and the pressure is generated by the Pascal pressure generated in the pressure transmitting liquid. The material powder in the bag is pressed isotropically. In this method, since the material is compressed isotropically from all directions by the Pascal pressure, it is possible to obtain a high-density molded body having excellent shape retention compared to the uniaxial pressure molding method.

[0005]

However, a resistance heating element is buried in a disk-shaped preformed body, and this preformed body is CIP-shaped.
Upon molding, the disc-shaped preform contracts isotropically. That is, the preform contracts in the radial direction at the same time as it contracts in the thickness direction. At this time, a contraction pressure in the radial direction is applied to the embedded resistance heating element. As a result, the resistance heating element is disconnected or the embedding position is greatly changed, and cannot be used as a heater.

An object of the present invention is to provide a new method for uniaxially press-forming a disc-shaped preform at a high density.

[0007]

According to the present invention, there is provided an annular outer shell having an inclined inner peripheral surface, and a plurality of sleeves each having an outer surface which can be fitted to the inner peripheral surface. A pair of punch plates movable in parallel with the inner surfaces of the sleeves while contacting the inner surfaces of the sleeves. And a pair of punch plates are fitted inside the sleeve, a plate-like preform is sandwiched between the pair of punch plates, and then the outer shell,
Covering the sleeve and the punch plate with an elastic coating,
The pair of punch plates are compressed by a Pascal pressure generated in the pressure transmitting liquid, and the plate-shaped preform is uniaxially pressed. The present invention relates to a method for forming a disk-shaped molded body, which forms a disk-shaped molded body.

Further, the present invention provides an annular outer shell having an inclined inner peripheral surface, a plurality of sleeves having an outer surface which can be fitted to the inner peripheral surface, and these sleeves. Prepare a pair of punch plates that can move in parallel to the inner surface while contacting the inner surface of the outer surface of the outer shell. Fitting, the pair of punch plates are fitted to the inside of the sleeve, and at this time, a disc-shaped preform is sandwiched between the pair of punch plates, and then the outer shell, the sleeve and the punch plate Is covered with an elastic film, and is accommodated in a pressure transmitting liquid. The pressure transmitting liquid is compressed. At this time, the pair of punch plates are compressed by the Pascal pressure generated in the pressure transmitting liquid, and the board-shaped preform is formed. The body is uniaxially pressed to form a disc-shaped compact, After removing the elastic coating, the metal outer shell and the metal sleeve are separated, and each metal sleeve is separated from the punching plate and the disk-shaped molded body to release from the disk-shaped molded body. The present invention relates to a method for producing a disc-shaped molded article.

Further, the present invention relates to a combination of forming tools for forming a disk-shaped molded product by uniaxially pressing the disk-shaped preformed product, wherein the annular outer shell has an inner peripheral surface inclined. A plurality of sleeves each having an outer surface having a shape that can be fitted to the inner peripheral surface, and a pair of punches that can move in parallel with the inner surface while being in contact with the inner surfaces of the sleeves The present invention relates to a combination of a molding tool and a molding tool.

According to the present invention, there is provided an annular outer shell having an inclined inner peripheral surface, an open annular sleeve, and a pair of inner sleeves which are movable in parallel with the inner surface while being in contact with the inner surface. A punch plate is prepared, and the sleeve is deformed in the circumferential direction to form a closed ring, and the outer surface of the sleeve is fitted to the inner peripheral surface of the outer shell, and the pair of punch plates is removed. Each is fitted inside the sleeve, and at this time, a disk-shaped preform is sandwiched between a pair of punch plates, and then the outer shell, the sleeve and the punch plate are covered with an elastic coating, and The pressure transmitting liquid is compressed, the pair of punch plates is compressed by Pascal pressure generated in the pressure transmitting liquid at this time, and the disk-shaped preform is uniaxially pressed to form a disk-shaped body. It relates to the molding method of the disk-shaped It is intended.

Further, the present invention provides an annular outer shell having an inclined inner peripheral surface, an open annular sleeve, and movable parallel to the inner surface of the sleeve while being in contact with the inner surface of the sleeve. A pair of punch plates are prepared, the sleeve is deformed in the circumferential direction to form a closed ring, and the outer surface of the sleeve is fitted to the inner peripheral surface of the outer shell, and the pair of punch plates is formed. Each of the plates is fitted inside the sleeve. At this time, a disc-shaped preform is sandwiched between a pair of punch plates, and then the outer shell, the sleeve and the punch plate are covered with an elastic coating, and pressure transmission is performed. The pressure transmitting liquid is compressed and the pair of punch plates is compressed by the Pascal pressure generated in the pressure transmitting liquid, and the disk-shaped preform is uniaxially pressed to form a disk-shaped material. Molding the body and removing the elastic coating After, and separating the said outer shell sleeve, is released from the plate shaped body by separating the sleeve from the punch plate and the plate-shaped molded product,
The present invention relates to a method for producing a disk-shaped molded body.

Further, the present invention relates to a combination of forming tools for forming a disk-shaped molded product by uniaxially pressing the disk-shaped preformed material, wherein an annular outer shell having an inclined inner peripheral surface; An open sleeve that is deformed in the circumferential direction to form a closed ring that can be fitted to the inner peripheral surface of the outer shell; and an inner sleeve that contacts the inner surface of the sleeve when closed. The present invention relates to a combination of a forming tool including a pair of punch plates movable in parallel to a side surface.

In the above description, the term "annular" includes those whose outer and inner contours are circular (annular), quadrilateral, triangular, and hexagonal. The shape of the “punch plate” includes not only a shape in which both main surfaces are flat (punch flat plate) but also a shape in which one of the two main surfaces is wavy. The planar outline of the "disk-shaped preform" may be a triangle (a disk shape), a triangle, a quadrangle, or the like, in addition to a circular shape (a disk shape). "Sleeve" or "outer shell"
Can be formed of metal, ceramics, hard plastic, or the like, and metal is the most practical.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a disc-shaped preform 5
FIG. 2 is a cross-sectional view schematically showing a state in which uniaxial pressure molding is performed, FIG. 2 is a plan view showing a state in which a metal outer shell 2, a metal sleeve 3, and a preform 5 are combined, and FIG. FIG. 4A is a cross-sectional view showing a state immediately before the outer shell 2 and the metal sleeve 3 are fitted to each other. FIG.
(b) is a plan view showing the release tool 8, and FIG. 5 is a cross-sectional view showing a state immediately before the disk-shaped molded body 15 is released.

In the present embodiment, a disk-shaped molded body 15 is manufactured in the following procedure. As shown in FIGS. 2 and 3, the metal outer shell 2 has an annular shape and has an inner peripheral surface 2a.
In addition, an inclination is provided in the axial direction of the ring. Each of the three metal sleeves 3 has an arc shape in plan view, and an outer surface 3a of each sleeve 3 is provided with an inclination so as to be able to fit with the inner peripheral surface 2a. Each sleeve 3
Has an arcuate shape in plan view. Each of the punch plates 4A and 4B has a disk shape.

In this embodiment, the disk-shaped preform 5
The resistance heating element 6 is buried in the inside. The planar shape of the buried position of the resistance heating element 6 is substantially spiral as shown in FIG. Each main surface 5a of the disc-shaped preform 5 is circular, and the planar shape of the side peripheral surface 5b is circular. The pressing surfaces 4a of the flat plates 4A and 4B for punching are respectively brought into contact with the respective main surfaces 5a of the preform 5, and the preform 5 is sandwiched between the flat plates 4A and 4B for punching. However, in FIG. 2, for convenience,
The illustration of the punch flat plate is omitted. The side peripheral surface 5b of the preform 5 and the side peripheral surfaces of the flat plates 4A, 4B for punching are
Align with each other.

The inner surface 3b of each metal sleeve 3 is brought into contact with the preformed body 5 and the side peripheral surfaces of the punch flat plates 4A and 4B. Of course, it is necessary to match the radius of curvature of the side peripheral surface 5b with the radius of curvature of the inner side surface 3b. The planar shape of each sleeve 3 is an arc shape, and an annular shape is formed by continuously combining three sleeves 3 as shown in FIG. Then, a spacer 7A is arranged at the lower end of each sleeve 3 so that each sleeve 3 does not fall.

As shown in FIG. 3, the metal outer shell 2 is lowered as shown by an arrow C, and the inner peripheral surface 2a and the outer surface 3a are brought into close contact with each other, and each sleeve 3 and the metal outer shell 2 are connected. Fit.
Then, as shown in FIG. 1, the metal outer shell 2, the metal sleeve 3, and the punch flat plates 4A and 4B are covered with the elastic coating 1. This is accommodated in a pressure transmitting liquid, and the pressure transmitting liquid is compressed. At this time, the pressure transmitting liquid is isotropically compressed as indicated by an arrow A by the Pascal pressure generated in the pressure transmitting liquid. Preferably, vacuum suction is performed from the opening 1a of the elastic coating 1 as shown by the arrow B.

According to such a molding method, since the disc-shaped preform 5 is pressurized by the Pascal pressure of the pressure transmitting liquid, even if the preform 5 has a considerably large area such as 6 inches or 8 inches, it can be easily formed. And a pressure of several tons / cm ² can be obtained. Therefore, a high-density compact can be obtained.

In addition, the above-mentioned Pascal pressure is not applied to the preform 5 in the portion where the metal outer shell 2 and the sleeve 3 exist. That is, no radial contraction pressure is applied to the disc-shaped preform 5. Then, the pair of punch flat plates 4A and 4B are compressed with respect to each other by the above-mentioned Pascal pressure. As a result, the disc-shaped preform 5 is uniaxially pressed in the thickness direction. Therefore, the present embodiment provides a new molding method for uniaxial pressure molding of the disc-shaped preform 5 at high density.

Next, the procedure of releasing the disk-shaped molded product will be described. In this embodiment, a release tool 8 shown in FIGS. 4 (a) and 4 (b) is used. The main body 8c of the release tool 8 has a substantially disk-shaped outer shape, and a disk-shaped recess 8b is formed inside the main body 8c. An annular flange 8a is provided at an end of the main body 8c.

After completion of the molding process as shown in FIG. 1, the whole is taken out of the pressure transmitting liquid and the elastic coating 1 is removed.
Next, as shown in FIG. 5, the spacer 7B is arranged below the metal outer shell 2, and the punch flat plate 4B is separated from the base. At this time, the metal outer shell 2 and the sleeve 3, and the sleeve 3 and the punch flat plates 4A and 4B are strongly adhered to each other. The release tool 8 is lowered, and the flat plate 4A for punch and the sleeve 3 are pressed by the main body 8c, and the sleeve 3 and the metal outer shell 2 are separated. Next, the sleeves 3 are removed from the punch flat plates 4A and 4B and the disk-shaped molded body 15, and the side peripheral surface 15 is removed.
Expose b. Then, from the main surface 15a, the flat plate for punch 4
A and 4B are separated.

According to such a method, the outer surface 3a of each sleeve 3 and the inner peripheral surface 2a of the metal outer shell are both inclined surfaces and have a taper. Therefore, first, each sleeve 3
Although a large force is required at the stage of finely moving the sleeve 3 against the metal
Can be removed from. If such an inclined surface is not provided, when separating each sleeve 3 from the metal outer shell 2, a large force must be continuously applied until both are completely separated.

Each of the three sleeves 3 has an arc shape and is formed separately from each other in advance. Therefore, each sleeve 3 can be separated from the punch flat plates 4A and 4B only by pulling each sleeve 3 outward, and the pressure force between the sleeve 3 and the punch flat plates 4A and 4B is small.
As described above, according to the present embodiment, the mold release of the disc-shaped molded body 15 can be easily performed.

The material of the metal outer shell 2 and the metal sleeve 3 is preferably a pressure-resistant rigid metal, such as hard stainless steel. As the material of the punch flat plates 4A and 4B, a material that is less deformed by pressure and has a small frictional resistance with the inner side surface 3b of the metal sleeve 3 is preferable.

In the above embodiment, three metal sleeves 3
Was used, but this number can be changed. In the example shown in FIG. 6, two metal sleeves 13 are used. The planar shape of each metal sleeve 13 is an arc, and the opening angle of the arc is about 180 °. The inner surface 13b of each sleeve 13 contacts the side peripheral surface 5b of the disc-shaped preform 5, and the outer surface 13a of each sleeve 13 contacts the inner peripheral surface 2a of the metal outer shell 2. The two sleeves 13 form a ring when viewed in plan.

In the example shown in FIG. 6, almost the above-described effects can be obtained. However, since the metal sleeves 13 are arc-shaped in plan view and the opening angle is about 180 °, each sleeve 13 has a shape that holds half of the disk-shaped preform 5. As a result, in the vicinity of both ends of the arc of each sleeve 13, a pressing force is generated in the direction of arrow D during isotropic consolidation molding, and this pressing force is applied to the central axis of the preform 5.
Pass around 30. Therefore, after molding, each sleeve
When separating the molded body 13 from the molded body 15, each sleeve 13
May be very strongly fixed. In this regard, when the sleeves 3 as shown in FIG. 2 are used, the fixing force of each sleeve 3 to the molded body is extremely small. As described above, in order to treat the disc-shaped preform 5 according to the present invention, it is preferable that the number of the sleeves 3 is three or more, and the planar opening angle of each sleeve 3 is about 120 ° or less. Is preferred.

The same experiment as described above was conducted for the case where the planar shape of the preform was a square. In the example schematically shown in FIG. 7A, the main surface 25a of the preform 25 is a square, and each side surface 25b is a flat surface. The two metal sleeves 23A have a U shape in plan view. With such a shape, an arrow D is formed between a pair of opposing side surfaces 25b.
The sleeve 23A is firmly fixed to the preformed body 25 because a pressing force is applied as shown in FIG.

In the example shown schematically in FIG. 7 (b), the two metal sleeves 23B are L-shaped in plan view.
With such a shape, a pressing force is applied as indicated by an arrow D along a line near the diagonal line of the main surface 25a. However, the sleeve
Since the 23B is L-shaped, the sleeve 23B can be easily separated by applying a force in the direction of the arrow E as compared with the example of FIG.

In the example shown in FIG. 7 (c), each metal sleeve 23C is a flat plate, and the sleeve 23C is brought into contact with each side surface 25b. In this example, no pressurizing pressure is applied to each of the sleeves 23C itself to sandwich the preform 25, so that each of the sleeves 23C can be peeled off very easily.

Hereinafter, more specific embodiments will be described. A tungsten wire was buried in silicon nitride powder and uniaxially pressed at a molding pressure of 200 kg / cm ² to produce a disc-shaped preform 5. This preform 5 was formed by the following methods.

(Example 1) The diameter of the preform 5 was set to 215 mm
And The preform 5 was pressure molded according to the method described with reference to FIGS. The pressure during isotropic consolidation at this time was 2.5 ton / cm ² . Mounting of the metal sleeve 3 and mounting of the metal outer shell 2 were extremely easy. Even after the isotropic compaction, the metal sleeve 3 could be removed from the outer shell 12 very easily, and each sleeve 3 could be removed from the punch flat plates 4A and 4B very easily. The pressure required for demolding at this time was 40 kg / cm ² and the time was 5
Seconds. (The density of the molded body 15 / the density of the preformed body 5) was 1.14 to 1.22.

Example 2 The diameter of the preform 5 was 165 mm
And According to the method shown in FIGS. 1, 3 to 6, the preform 5 was pressure-formed. Metal sleeve 13 shown in FIG.
Was used. The pressure during isotropic compaction was 2.5 ton / cm ² . Also in this example, the mounting of the metal sleeve 13 and the mounting of the metal outer shell 2 were extremely easy. After the isotropic consolidation molding, the metal sleeve 13 could be very easily removed from the outer shell 2, but it was somewhat difficult to remove the sleeve 13 from the molded body 15. The pressure required for demolding at this time is 40 kg
/ Cm ² and the time was about 5 seconds. (The density of the molded body 15 / the density of the preformed body 5) was 1.14 to 1.22.

(Comparative Example 1) The diameter of the preform 5 was 165 mm
And As shown in FIG. 8, the preform 5 was set, and was subjected to isotropic compaction. In FIG. 8, the flat plates for punch 4A,
4B is the same as that of FIG. The outer shape of the metal wire shell 12 was annular, and the inner peripheral surface 12a of the metal shell 12 was not tapered. Punch flat plates 4A and 4B inside outer shell 12
Was inserted, and the disk-shaped preform 5 was sandwiched between them.
Both of the punch flat plates 4A and 4B can move in parallel with the inner peripheral surface 12a. The pressure during isotropic compaction molding is
2.5 tons / cm ² . In this example, the flat plate for punch 4
A considerable pressing force was required to insert A and 4B into the metal shell 12. Further, even after molding, the flat plate for punch 4
Since the metal outer shell 12 was firmly fastened and fixed to A and 4B, it was very difficult to release the mold. When a large pressure was applied to release the molded product, the molded product collapsed. (The density of the compact 15 / the density of the preform 5) was 1.12.

(Comparative Example 2) The diameter of the preform 5 was 215 mm
And Then, the preformed body 5 was set as shown in FIG. 9 and was subjected to isotropic compaction. The metal shell 12 was the same as that of FIG. Three metal sleeves 33 were fitted inside the metal outer shell 12, and the punch flat plates 4A and 4B were inserted inside the metal sleeve 33. The planar shape of each metal sleeve 33 is the same as that of the sleeve 3 shown in FIG. shell
The outer peripheral surface 33a of the sleeve 33 is brought into contact with the inner peripheral surface 12a of the sleeve 12, and the inner peripheral surface 33b of the sleeve 33 is contacted with the side peripheral surface 5b of the preformed body 5.
Abut. The pressure during isotropic compaction is 2.5 tons / cm
^{And 2} .

In this embodiment, when the metal sleeve 33 is accommodated in the outer shell 12, a considerable pressing force is required. After the isotropic consolidation molding, the outer shell 12
Was firmly fixed, so that the release was very difficult. The pressure required for demolding is 200 kg / cm ² and the time is 30
Seconds. (Density of molded body 15 / density of preformed body 5)
Was 1.14 to 1.22.

Next, another embodiment will be described. In this embodiment, instead of using a plurality of sleeves,
One metal sleeve 43 shown in FIG. 10B was used. The metal sleeve 43 has an open annular shape in plan view, and an outer shell 2
Is inclined so as to be able to fit with the inner peripheral surface 2a. An inner side surface 43b of the metal sleeve 43 has a circular arc shape in plan view, and a gap 44 is provided in an open portion of the metal sleeve 43. In the present embodiment, the metal sleeve 43
The other members are the same as those shown in FIGS. 1 to 5.

Then, the disk-shaped preform 5 is uniaxially pressed in the same manner as shown in FIGS. However,
In the stage of mounting the metal sleeve 43, first, a compressive force in the circumferential direction is applied to the metal sleeve 43 to eliminate the gap 44, thereby forming a closed ring shown in FIG. In FIG. 10A, reference numeral 40 denotes a seam. Next, as shown in FIG. 3, the metal outer shell 2 is lowered, and the outer surface 43a is fitted to the inner peripheral surface 2a. Then, uniaxial pressure molding is performed by the method described above.

After the uniaxial pressing, the elastic coating and the metal shell 2 are removed as described above. Next, the vicinity of the seam 40 of the metal sleeve 43 is pulled outward to restore the original shape shown in FIG. Next, the disk-shaped molded body 15 and the plate-shaped punches 4A and 4B are slid with respect to the metal sleeve 43 to be extracted.

In this embodiment, basically the same effects as in FIGS. 1 to 5 can be obtained. That is, a large molding pressure can be easily obtained, the preformed body can be uniaxially pressed at a high density, and the metal outer shell 2 can be easily removed from the metal sleeve 43. The metal sleeve 43 has an open ring shape and is deformable so as to expand in the circumferential direction even after uniaxial pressure molding. Therefore, when releasing the disk-shaped molded body, the metal sleeve 43 can be easily separated from the punch flat plates 4A and 4B.

[0041]

According to the present invention, a pair of punch plates are compressed by the Pascal pressure generated in the pressure transmitting liquid, and the plate-like compact is uniaxially pressed by the punch plate. Is large, a pressure of several tons / cm ² can be easily obtained, and therefore a high-density compact can be obtained.

In addition, the above-mentioned Pascal pressure is not applied to the preformed body in the portion where the outer shell and the sleeve are present. That is, no radial contraction pressure is applied to the preformed body. Then, the pair of punch flat plates are compressed against each other by the above-mentioned Pascal pressure, and the preform is uniaxially pressed in the thickness direction. Accordingly, the present invention provides a new molding method for uniaxially press-molding a preform at a high density.

When the disc-shaped molded body is released from the mold, the contact surface between the outer shell and the sleeve is provided with an inclination.
At the first stage of finely moving the sleeve relative to the outer shell, pressure is required, but the sleeve can then be easily removed from the outer shell.

The plurality of sleeves are separate from each other, and a pair of punch plates are in contact with the inner surfaces of these sleeves. Therefore, when releasing the disc-shaped molded body, each sleeve can be separated from the punch plate only by pulling each sleeve outward, and the pressing force between the sleeve and the punch plate is small. Thus, according to the present invention,
The mold release of the disk-shaped molded body can be easily performed.

The sleeve has an open ring shape and can be deformed so as to expand in the circumferential direction even after uniaxial pressure molding. Therefore, the sleeve can be easily separated from the punch plate when releasing the disc-shaped molded body.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a state in which a disk-shaped preform 5 is uniaxially pressed.

FIG. 2 is a plan view showing a state in which a metal outer shell 2, a metal sleeve 3, and a disk-shaped preform 5 are set.

FIG. 3 is a cross-sectional view showing a state immediately before a metal outer shell 2 is fitted to a metal sleeve 3;

FIG. 4A is a cross-sectional view showing the release tool 8, and FIG.
FIG. 3 is a plan view showing the release tool 8.

FIG. 5 is a cross-sectional view showing a state immediately before the disk-shaped molded body 15 is released.

FIG. 6 is a plan view showing a state where a metal outer shell 2, a metal sleeve 13, and a disc-shaped preform 5 are set.

FIGS. 7 (a), (b), and (c) are plan views schematically showing a state in which a metal sleeve is set on a preform 25. FIG.

FIG. 8 shows a pair of punch flat plates 4 inside a metal outer shell 12;
It is sectional drawing which shows the state which set A, 4B and the disk-shaped preform 5.

9 shows a pair of punch flat plates 4 inside a metal outer shell 12. FIG.
FIG. 4 is a cross-sectional view showing a state where A, 4B, a disc-shaped preform 5 and a metal sleeve 33 are set.

FIG. 10 (a) shows a metal outer shell 2, a metal sleeve 4
FIG. 3 is a plan view showing a state where a disk-shaped preform 5 is set. (B) is a plan view showing the metal sleeve 43.

[Explanation of symbols]

 1 Elastic coating 2,12 Metal shell 2a, 12a Inner peripheral surface of metal shell 3, 13, 23A, 23B, 23C, 33, 43 Metal sleeve 3a, 13a, 33a, 43a Outside surface of metal sleeve 3b, 13b, 33b, 43b Inner surface of metal sleeve 4A, 4B Flat plate for punch 5,25 Disc-shaped preform 5b, 25b Side peripheral surface of disc-shaped preform 8 Release tool 15 Disc-shaped product A Pascal Direction of pressure

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁶ identification symbol FI B30B 11/00 B30B 11/00 P (58) Field surveyed (Int.Cl. ⁶ , DB name) B28B 3/00 102 B22F 3 / 04 B28B 7/00 B28B 23/00 B30B 5/02 B30B 11/00

Claims (6)

(57) [Claims] An annular outer shell having an inner peripheral surface that is an inclined surface;
A plurality of sleeves each having an outer surface having a shape that can be fitted to the inner peripheral surface, and a pair of punches that can move in parallel with the inner surface while being in contact with the inner surfaces of the sleeves And a pair of punch plates are fitted to the inside of the sleeve, and the outer surfaces of the plurality of sleeves are respectively fitted to the inner peripheral surface of the outer shell. A disc-shaped preform is sandwiched between a pair of punch plates, and then the outer shell, the sleeve and the punch plate are covered with an elastic coating, accommodated in a pressure transmitting liquid, and the pressure transmitting liquid is compressed. At this time, a method of forming a disk-shaped molded body, wherein the pair of punch plates is compressed by Pascal pressure generated in the pressure transmitting liquid, and the disk-shaped preformed body is uniaxially pressed to form a disk-shaped formed body. 2. An annular outer shell whose inner peripheral surface is an inclined surface,
A plurality of sleeves each having an outer surface having a shape that can be fitted to the inner peripheral surface, and a pair of punches that can move in parallel with the inner surface while being in contact with the inner surfaces of the sleeves And a pair of punch plates are fitted to the inside of the sleeve, and the outer surfaces of the plurality of sleeves are respectively fitted to the inner peripheral surface of the outer shell. A disc-shaped preform is sandwiched between a pair of punch plates, and then the outer shell, the sleeve and the punch plate are covered with an elastic coating, accommodated in a pressure transmitting liquid, and the pressure transmitting liquid is compressed. At this time, the pair of punch plates are compressed by the Pascal pressure generated in the pressure transmitting liquid, the disc-shaped preform is uniaxially pressed to form a disc-shaped molded article, and after removing the elastic coating, Separate the outer shell and the sleeve, and To release from the plate shaped body by separating the over blanking from said punch plate and said plate-shaped molded product, a method for manufacturing a disk-shaped molded body. 3. A combination of forming tools for forming a disc-shaped molded product by uniaxially pressing a disc-shaped preformed product, wherein the inner peripheral surface is an annular outer shell, and the inner peripheral surface is an inclined surface. A plurality of sleeves having outer surfaces of a shape that can be fitted to the pair of sleeves, and a pair of punch plates movable in parallel to the inner surfaces while contacting the inner surfaces of the sleeves. Combination of molding tools. 4. An annular outer shell whose inner peripheral surface is an inclined surface,
Preparing an open sleeve and a pair of punch plates that can move in parallel to the inner surface while being in contact with the inner surface of the sleeve, and deform the sleeve in the circumferential direction to form a closed ring At the same time, the outer surface of the sleeve is fitted to the inner peripheral surface of the outer shell, and the pair of punch plates are fitted respectively to the inside of the sleeve. The molded body is sandwiched, and then the outer shell, the sleeve, and the punch plate are covered with an elastic coating, accommodated in a pressure transmitting liquid, and the pressure transmitting liquid is compressed. At this time, the pressure transmitting liquid is generated in the pressure transmitting liquid. A method of forming a disk-shaped molded body, wherein the pair of punch plates is compressed by Pascal pressure, and the disk-shaped preformed body is uniaxially pressed to form the disk-shaped formed body. 5. An annular outer shell whose inner peripheral surface is an inclined surface,
Preparing an open sleeve and a pair of punch plates that can move in parallel to the inner surface while being in contact with the inner surface of the sleeve, and deform the sleeve in the circumferential direction to form a closed ring At the same time, the outer surface of the sleeve is fitted to the inner peripheral surface of the outer shell, and the pair of punch plates are fitted respectively to the inside of the sleeve. The molded body is sandwiched, and then the outer shell, the sleeve, and the punch plate are covered with an elastic coating, accommodated in a pressure transmitting liquid, and the pressure transmitting liquid is compressed. At this time, the pressure transmitting liquid is generated in the pressure transmitting liquid. The pair of punch plates are compressed by Pascal pressure, the disc-shaped preform is uniaxially pressed to form a disc-shaped compact, and after removing the elastic coating, the outer shell and the sleeve are separated. , Sleeve for the punch And released from the plate shaped body by separating from the plate-like molded body, a method for manufacturing a disk-shaped molded body. 6. A combination of forming tools for forming a disc-shaped molded product by uniaxially pressing the disc-shaped pre-formed product, wherein an annular outer shell having an inclined inner peripheral surface, and an open annular sleeve. A sleeve that forms a closed ring that can be fitted to the inner peripheral surface of the outer shell by deforming in the circumferential direction; and a sleeve that contacts the inner surface of the sleeve when the ring is closed. A combination of forming tools consisting of a pair of punch plates that can move in parallel.