JPH1085996A - Pressure forming equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To load a uniform pressure on an object to be formed with pressure and to prevent a defective press-fitting by having pressureizing force uniforming member interposed between a 1st pressure member and a 2nd pressure member and composed of forming the face toward the object to be formed with pressure of a soft elastic member. SOLUTION: A fluid 10 is pressed in a fluid receiving space 33, a shield rubber 6 forming the fluid receiving space 33 holds the fluid 10 pressed in the space 33 air-tightly, and a protect rubber 34 as a base stock having a soft and elastic force is also installed. Therefore, the object to be press-formed 18 which is pressed with the protect rubber 34 depending on the pressurizing force of a piston 1 is pressure-formed over the total surface with the uniform pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press forming apparatus capable of applying a uniform pressure to a press-formed product.

[0002]

2. Description of the Related Art Conventionally, a multilayer capacitor is known as an example of a ceramic laminate. This multilayer capacitor has a plurality of internal electrodes formed inside a ceramic unit, and external electrodes electrically connected to the internal electrodes at both ends.

As a method of manufacturing such a multilayer capacitor, for example, conventionally, a plurality of rectangular electrodes are formed on a ceramic green sheet and a plurality of green sheets on which such a plurality of electrodes are formed are stacked. Later, a mechanical press method or the like in which this is pressed with, for example, a press plate is known.

[0004]

The conventional method of press-fitting with a rigid body has a short molding processing time and is excellent in production efficiency. However, the working surface of the pressing member or the fixing member and the surface of the molded object to be pressed are excellent. If the parallelism between the two is not maintained at the contact surface with the material, or if the material to be pressed has irregularities, the pressure applied to the material to be pressed becomes uneven, and Insufficient crimping without increasing the molding density,
This was the cause of defective moldings and delamination. And, the parallelism of the surface to be pressed of the object to be pressed with respect to the plane perpendicular to the pressing direction must be extremely strictly adjusted and controlled. Short processing time, excellent production efficiency, can prevent the crimping failure,
There is a need for a pressure molding apparatus that can reduce the incidence of molding failure and layer peeling.

[0005] In the past, in the conventional step of temporarily pressing a laminated body, a plurality of press-formed products are subjected to, for example, 5 to 30 kg / c.
Repeat the provisional press that is temporary crimp in m ² about the low pressure,
It is possible to obtain a temporary press-bonded product of the laminate by sequentially increasing the number of layers of the press-formed product, but the temporary press-bonding is repeated every time the layers of the press-formed product are stacked, for example, 10 layers or more. In the case of repeated temporary crimping, it is desired to reduce both the tact time and the total time for manufacturing the temporary crimped product of the laminate and to prevent the crimping failure. .

Further, in the step of temporarily compressing the laminate, the thickness of the temporary press-bonded material is gradually increased each time the layers of the molded article to be pressed are stacked. Fine adjustment of the device in consideration of the change was necessary.

An object of the present invention is to provide a pressure molding apparatus capable of applying a uniform pressure to an object to be pressed.

Another object of the present invention is to provide a pressure molding apparatus which has a short molding processing time, is excellent in production efficiency, can prevent the above-mentioned press-bonding failure, and can reduce the occurrence rate of molding failure and layer peeling. It is in.

Another object of the present invention is to provide a pressure molding apparatus capable of reducing the tact time in the step of temporarily compressing a laminated body and preventing the above-mentioned defective bonding. .

Another object of the present invention is to provide a pressure molding apparatus which does not require fine adjustment in the apparatus even when the thickness of the laminate changes.

[0011]

According to an embodiment of the present invention, at least one of the members is formed so as to be movable toward the other, and the object to be pressed is press-formed with mutual clamping pressure. A first pressurizing member and a second pressurizing member capable of being interposed between the first pressurizing member and the second pressurizing member, and heading toward a molded article to be pressurized. And a pressure equalizing member having a surface formed of a flexible elastic member. In a preferred aspect, the pressing force equalizing member includes: (1) the pressing force equalizing member, a film-shaped flexible elastic member facing a molded article to be pressed, and the film-shaped flexible elastic member; (2) A bag formed of the flexible elastic member capable of being filled with a fluid, the fluid being filled between the first and second pressure members. And (3) a liquid-tightly formed bag made of a flexible elastic member, and a fluid filled inside the bag. And (4) a lump-shaped flexible elastic member.

In another preferred aspect, the first type
The pressing member is a pressing member having a surface facing the second pressing member formed so as to be able to dispose a molded article to be pressed, and formed so as to be able to move up and down toward the second pressing member. Yes,
The second pressing member is a fixed member that is immovably formed, and the pressing force equalizing member is provided on a surface of the fixed member facing the pressing member.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

(Specific Description) Example 1 As shown in FIG. 1, a pressure forming apparatus according to a specific example of the present invention includes a piston 1, a lower plate 2, and an upper plate 4 fixed to an upper substrate 3. , A middle plate 5 and a seal rubber 6.

The piston 1 is mounted on a hydraulic cylinder 7.

In the hydraulic cylinder 7, the piston 1 projecting from the upper end opening can project to the upper surface of the lower substrate 8 through the opening 9 provided in the lower substrate 8 disposed horizontally. Then, it is mounted on the lower surface of the lower substrate 8. A fluid 10 supplied from a fluid guiding / discharging means (not shown) is press-fitted into the hydraulic cylinder 7 and the fluid 1 is supplied from the hydraulic cylinder 7 to the hydraulic cylinder 7.
0 from the first fluid guiding / discharging passage 11 and the hydraulic cylinder 7 from a compressed air conducting / discharging means (not shown).
There is provided a first gas conducting / discharging passage 12 into which compressed air can be press-fitted and discharged by the compressed air conducting / discharging means.

On the upper surface of the lower substrate 8, a pair of columns 13 extending in the vertical direction and arranged in parallel with each other are erected.

On one of the columns 13, four transfer arms 14 arranged in a cross shape around the column 13 are mounted so as to be horizontally rotatable. As shown in FIGS. 3 and 4, the transfer arm 14 is formed so as to be rotatable clockwise with a rotation angle of 90 degrees around the column 13 by a driving means such as a rotation motor 15. As shown in FIGS. 1 and 4, a transfer table 16 is connected to the tip of the transfer arm 14. The transfer table 16 has an upper area sufficient to mount the lower plate 2 and has a through hole 17 having a diameter sufficient to allow the piston 1 to pass therethrough. When the transfer table 16 is located above the opening 9 in the lower substrate 8, the position of the transfer table 16 is referred to as a pressing position, and the transfer table 16 is rotated by 90 degrees from the pressing position. The position is referred to as a sample unloading position, and the position at which the carrier 16 is rotated 90 degrees from the sample unloading position is referred to as a sample setting position.
Further, a position where the transfer table 16 is rotated by 90 degrees from the sample setting position is referred to as a preheating position. In this preheating position, a preheating means 3 for performing predetermined heating to the transfer table 16 in the preheating position is provided.
7 are provided.

A lower plate 2 is attached to each of the transfer tables 16 connected to the respective leading ends of the four transfer arms 14.
The transfer arm 14 is detachably fixed so as not to be displaced during the rotational movement of the transfer arm 14 and to be lifted from the transfer table 16 by the tip of the piston 1 during pressure molding.

The lower plate 2 is formed in a disk shape having a predetermined diameter so that the object 18 to be pressed can be mounted thereon. More specifically, the press-formed product 18 is loaded into a through hole 21 formed in a mold rubber 20 placed on the upper surface of the transport plate 19. Here, the transfer plate 19 and the mold rubber 20 have an outer periphery having the same diameter as the lower plate 2. or,
An O-ring 2 serving as a sealing member is provided on an outer peripheral surface of the lower plate 2.
2 are mounted.

Further, the lower surface of the lower plate 2 has an opening having the same shape as the distal end surface of the piston 1 and has a predetermined depth so that the distal end portion of the piston 1 can be fitted therein. A concave mounting hole 23 is formed.

The pair of columns 13 support the upper substrate 3.

On the lower surface of the upper substrate 3, an upper plate 4 is mounted and fixed. The upper plate 4 has a second fluid guide / discharge passage 2
4 is provided, and the opening of the second fluid guide / discharge passage 24 is opened on the lower surface of the upper plate 4.

On the lower surface of the upper plate 4, a middle plate 5 is mounted and fixed. The middle plate 5 is an annular plate having a mounting through hole 25. The mounting through-hole 25 has a small-diameter portion 26 having a diameter that allows the lower plate 2 to be fitted therein, and the small-diameter portion 26 formed above the small-diameter portion 26 and by the upper plate 4. End face 2 formed in a direction perpendicular to the axis of
7, an upper tapered portion 28 that expands in a tapered shape from the extension of the end face portion 27, and a tapered shape that opens below the small diameter portion 26 and on the lower surface of the middle plate 5. And a lower tapered portion 29.

A backup ring 30 is mounted on the upper tapered portion 28. The backup ring 30
An annular body having an outer peripheral surface following the tapered surface of the upper tapered portion 28 and an inner peripheral surface parallel to the axis of the backup ring 30. The backup ring 30 bites like a wedge into a gap having a triangular longitudinal section formed by the lower surface of the upper plate 4 and the upper tapered portion 28 by the pressure applied during pressure molding. Thereby, the airtightness between the upper plate 4 and the middle plate 5 is ensured. or,
A large diameter portion 31 is formed by the inner peripheral surface of the backup ring 30 and the end surface portion 27, which are formed in the gap having a triangular longitudinal section and formed by the lower surface of the upper plate 4 and the upper tapered portion 28. Are formed.

The seal rubber 6 is mounted on the large diameter portion 31. The seal rubber 6 is a disk-shaped body having substantially the same diameter as the end face portion 27, and has a folded portion 32 on the outer peripheral edge of the disk state. This folded portion 32
The backup ring 30 has an outer peripheral surface along the inner peripheral surface. A fluid accommodating space 33 is formed by the seal rubber 6 and the lower surface of the upper plate 4. A protective rubber 34 is mounted on the surface of the seal rubber 6 on the side of the small diameter portion 26.

The middle plate 5 is provided with a second gas conducting / discharging passage 35 which is opened on the inner peripheral surface of the small diameter portion 26.
A heater 36 is mounted on the outer peripheral surface of the middle plate 5.

Next, the operation of the pressure molding apparatus will be described.

As shown in FIG. 1, in the initial state, the tip of the piston 1 is in the opening 9 of the lower substrate 8 so that the horizontal movement of the carrier 16 is not hindered. . Further, on the upper surface of the lower plate 2 fixed to the upper surface of the transfer table 16 at the sample setting position, the molded article to be pressed 18 is loaded into the through hole 21 of the mold rubber 20 and
Is placed on the transport plate 19 on which the.

The transfer table 16 at the sample setting position is moved to the preheating position by rotating the transfer arm 14 by 90 degrees.

In the preheating position, the pressurized molded product 18 on the conveying plate 19 fixed on the conveying table 16 is heated by the preheating means 37 to a predetermined temperature.

Next, the transfer table 16 at the preheating position is moved to the pressing position by rotating the transfer arm 14 by 90 degrees.

As shown in FIG. 1, the first fluid guide / discharge passage 11
The fluid 10 is press-fitted into the internal space between the bottom surface of the hydraulic cylinder 7 and the rear end of the piston 1 via.

By the press-fitting of the fluid 10, the piston 1 rises. The rising end of the piston 1 passes through the opening 9 of the lower substrate 8 and the through hole 17 of the carrier 16 and is inserted into the concave mounting hole 23. When the piston 1 still rises, the tip 1 of the piston 1 lifts the lower plate 2 from above the carrier 16 and raises it. When the lower plate 2 lifted by the lifting of the piston 1 rises, the mold rubber 20, the transport plate 19 and the lower plate 2 are finally inserted into the mounting through holes 25.

That is, the mold rubber 20, the transfer plate 19 and the lower plate 2 pass through the lower tapered portion 29 and are fitted into the small diameter portion 26. Since the middle plate 5 is provided with the lower taper portion 29, the rising rubber 20 and the transfer plate 1 are provided.
Even if the center lines of the lower plate 9 and the lower plate 2 are slightly displaced from the center line of the small diameter portion 26, they are smoothly and reliably guided into the small diameter portion 26.

When the piston 1 is further raised, the mold rubber 20
In addition, the upper surface of the molded article 18 comes into contact with the lower surface of the protective rubber 34. By providing the protective rubber 34, the seal rubber 6 does not come into direct contact with the molded article 18 under pressure, so that the seal rubber 6 is damaged from the molded article 18 under pressure and the frequency of replacement of the seal rubber 6 is increased. Can be prevented.

On the other hand, the fluid is already pressurized and filled in the fluid accommodating space 33. Also, the second gas guide / discharge path 35
Through this, the gas in the mounting through-hole 25 is exhausted.

The fluid 10 still flows through the first fluid guide / discharge channel 11 to the bottom of the hydraulic cylinder 7 and the piston 1.
The piston 1 presses the molded article 18 with a predetermined pressure.

At this time, the fluid 10
Is press-fitted, and the seal rubber 6 forming the fluid storage space 33 can hold the fluid 10 press-fitted in the fluid storage space 33 in an airtight manner, and is formed of a material having flexibility and elasticity. Therefore, in this specific example, since the protective rubber 34, which is a particularly flexible material, is also provided, the pressurized molded product 18 pressed against the protective rubber 34 by the pressing force of the piston 1 has It is pressed with a uniform force on the surface. Also, even if a step is formed between the surface of the mold rubber 20 and the upper surface of the molded article 18 to be pressed, the seal rubber 6 and the protective rubber 34
Closely adheres to the upper surface of the mold rubber 20 and the pressed object 18. As a result, the article to be pressed 18 is uniformly pressed.

The mold rubber 20, the transport plate 19 and the lower plate 2
However, when fitted into the mounting through hole 25, the inside of the mounting through hole 25 becomes airtight due to the O-ring 22 which is a seal member provided on the outer peripheral surface of the lower plate 2.

The pressurized molded product 18 is heated to a predetermined temperature by the heater 36. Depending on the composition of the press-formed product 18, this heating generates a gas such as water vapor, a volatile content of a residual solvent, and other reaction product gas generated by a heating reaction from the press-formed product 18. These gases are removed by the vacuum degassing action of a vacuum pump (not shown) through the second gas guide / discharge path 35.

By these pressurizing action, heating action and depressurization deaeration action, a pressed compact having a higher density is formed.

By this series of operations, the molded article to be pressed 1
A uniform pressure is applied to the entire surface to be pressed 8. The pressurized surface of the pressurized molded product 18 is not only parallel to a plane perpendicular to the pressing direction, but also a non-parallel surface, or a surface with irregularities. Even if the pressure is applied, the pressing force is not unevenly applied, so that the bonding failure does not occur. When the molded article to be pressed 18 is a laminate formed by laminating a plurality of green sheets,
There is no occurrence of molding failure or delamination.

Further, the pressing force of the piston 1 is also transmitted to the mold rubber 20 supporting the side surface of the article 18 to be pressed, and the mold rubber 20 is moved to the side of the article 18 to be pressed. 1 to transmit the pressing force,
Of the mold in the side direction and defective molding can be prevented. For example, when the article to be pressed is a multi-layered body, it is possible to prevent problems in the conventional method of crimping with a press plate, such as the article to be pressed having a trapezoidal molding failure.

After the pressurization for a predetermined time, the gas leak valve (not shown) provided in the second gas guide / discharge passage 35 is released to return the inside of the mounting through hole 25 to normal pressure. Next, the fluid 10 press-fitted into the fluid accommodating space 40 and the internal space between the bottom surface in the hydraulic cylinder 7 and the rear end of the piston 1 is transferred to the second fluid guide / discharge passage 24 and the first The fluid is discharged by a fluid conducting / discharging means (not shown) through the fluid conducting / discharging path 11.

Further, when compressed air is pressed into the internal space between the side wall surface in the hydraulic cylinder 7 and the body of the piston 1 through the first gas conducting / discharging passage 12, the piston 1 descends. Then, the tip of the piston 1 is
When the position where the horizontal rotation is not hindered is reached, the lowering of the piston 1 is stopped.

The lower plate 2 on which the press-formed object 18 is placed is fixed on the transfer table 16 again, and the transfer arm 14 is rotated by 90 degrees so that the sample is moved from the pressing position to the sample position. It is moved to the unloading position.

In this series of operations, a cycle of 6 to 10 seconds is possible as a molding processing time (sometimes called a tact time). Therefore, maintaining the production efficiency in the conventional method of crimping with a press plate, and, without strictly adjusting the parallelism as in the related art, without performing management.
A uniform pressure can be applied to the molded article to be pressed, and no pressure failure occurs. And when the molded article to be pressed is a laminate formed by laminating a plurality of green sheets,
There is no occurrence of molding failure or delamination.

In particular, as described above,
Since a cycle of 6 to 10 seconds is possible, if this pressure molding apparatus is employed, the total time for manufacturing a laminate by temporarily compressing a plurality of layers can be reduced. In other words, in a general crimping process of a laminated body, for example, when a plurality of layers of various materials are stacked, temporary pressing at a low pressure of about 5 to 30 kg / cm ^2, that is, temporary crimping, is repeated every time the layers are stacked. Become. Therefore, as described above, since a cycle of 6 to 10 seconds can be performed by the pressure molding apparatus as the molding processing time, the pressure molding apparatus advantageously reduces the production efficiency and economy of the laminated body. Temporary crimping can be performed.

Further, in the temporary compression bonding step, the thickness of the laminate to be temporarily compressed changes every time the layers of the material to be temporarily compressed are stacked. Therefore, in the conventional method of press-bonding with a press plate, for example, in order to avoid a failure or breakage of the device due to a change in the thickness of the laminate, the thickness of the laminate is reduced every time the layers are stacked in the temporary pressing step. Although it was necessary to make fine adjustments to the equipment that was taken into account, with this pressure molding equipment, there was no need to worry about equipment failure or breakage due to changes in the thickness of the laminate, and it was possible to further improve production efficiency. it can.

In the first embodiment, the first pressing member of the present invention is formed with the lower plate 2 and preferably formed with the lower plate 2 and the piston 1 which can be moved up and down. The second pressing member is formed with the upper plate 4, and preferably, the upper plate 4 fixed to the upper substrate 3 and the upper plate 4.
And an intermediate plate 5 fixedly mounted on the lower surface of the upper plate 4. The pressing force equalizing member according to the present invention is mounted on the lower surface of the upper plate 4 so that the fluid accommodating space 33 is formed. It is formed having the seal rubber 6 which is a flexible elastic member in the form of a film and the fluid 10 filled in the fluid accommodating space 33.

In Example 1, the pressing member according to the present invention is formed with the lower plate 2, and
And a piston 1 formed so as to be able to move up and down, and the fixing member is formed having an upper plate 4 whose position is fixed, and is preferably provided upright on the upper surface of the lower substrate 8. The upper plate 4 is fixed to the upper substrate 3 supported by the support 13, and the pressure equalizing member is formed on the lower surface of the upper plate 4 and the fluid accommodating space 33 is formed. It is formed with the seal rubber 6 mounted and the fluid 10 filled in the fluid storage space 33.

Example 2 Hereinafter, another specific example of the present invention will be described.

As shown in FIG. 5, a uniform press forming apparatus which is a specific example of the press forming apparatus of the present invention has a piston 1
Lower plate 2, upper lid plate 4 </ b> A fixed to upper substrate 3,
It has an intermediate plate 5 and a fluid-tight bag 6A.

An upper cover plate 4A is mounted and fixed on the lower surface of the upper substrate 3 supported by the pair of columns 13 in the uniform pressure forming apparatus.

An intermediate plate 5 is mounted and fixed to the lower surface of the upper cover plate 4A. The intermediate plate 5 has a mounting through hole 25. The mounting through-hole 25 has a small-diameter portion 26 having a diameter allowing the lower plate 2 to be inserted therein and the small-diameter portion 26 formed above the small-diameter portion 26 and formed by the upper lid plate 4A. An end surface portion 27 formed in a direction perpendicular to the axis of the upper surface, and an upper tapered portion 2 which expands in a tapered shape from the extension of the end surface portion 27.
8 and a lower tapered portion 29 which opens below the small-diameter portion 26 and opens on the lower surface of the intermediate plate 5 and expands in a tapered shape.

A backup ring 30 is mounted on the upper tapered portion 28. This backup ring 30
The upper cover plate 4 is pressed by pressure applied during pressure molding.
The airtightness between the upper lid plate 4A and the middle plate 5 is ensured by biting like a wedge into a gap having a triangular vertical cross section formed by the lower surface of A and the upper tapered portion 28.
A large diameter portion 31 is formed by the inner peripheral surface of the backup ring 30 and the end surface portion 27.

The large diameter portion 31 has a fluid-tight bag 6A
Is attached. The fluid-tight bag 6A is formed of a material having soft elasticity and pressure resistance, has a fluid-filled space 33A in which a fluid can be filled, and has the end face portion 2A.
7 is a cylindrical body having substantially the same diameter as FIG. An end 32A of the fluid-tight bag 6A has an outer peripheral surface along the inner peripheral surface of the backup ring 30. A protective rubber 34 is attached to the surface of the fluid-tight bag 6A on the small-diameter portion 26 side.

Next, the operation of the uniform pressure molding apparatus will be described.

As shown in FIG. 6, when the piston 1 rises, the upper surface of the mold rubber 20 and the pressed product 18 come into contact with the lower surface of the protective rubber 34. By providing the protective rubber 34, the fluid-tight bag 6A does not come into direct contact with the molded article 18 to be pressed.
Can be prevented from being damaged by the pressurized molded product 18 and the frequency of replacement of the fluid-tight bag 6A can be prevented from increasing.

The sealed fluid 10A has already been press-fitted into the fluid sealed space 33A of the fluid-tight bag 6A and sealed.

On the other hand, in the mounting through hole 25,
The gas in the mounting through hole 25 is exhausted through the second gas conducting / exhausting passage 35, and the piston 1 presses the pressurized molded product 18 at a predetermined pressure.

At this time, since the fluid-tight bag 6A can hold the sealed fluid 10A in a gas-tight manner and is made of a material having a soft elastic force and pressure resistance, in this specific example, it is particularly flexible. Since the protective rubber 34 which is a material having a property is also provided, the pressurized molded product 18 pressed against the protective rubber 34 by the pressing force of the piston 1.
Is pressed with uniform force on all its surfaces. Further, even if there is a step between the surface of the mold rubber 20 and the upper surface of the article 18 to be pressed, the fluid-tight bag 6A and the protective rubber 34 are not covered by the mold rubber 20 and the article 18 to be pressed. Adhere to the top surface. As a result, the article to be pressed 18 is uniformly pressed.

After pressurizing for a predetermined time, the gas leak valve (not shown) provided in the second gas conducting / discharging passage 35 is released to return the inside of the mounting through hole 25 to normal pressure. Next, the fluid 10 that has been press-fitted into the internal space between the bottom surface in the hydraulic cylinder 7 and the rear end of the piston 1 is discharged by the fluid conducting / discharging means (not shown) through the first fluid conducting / discharging passage 11. I do.

Further, when compressed air is pressed into the internal space between the side wall surface in the hydraulic cylinder 7 and the body of the piston 1 through the first gas conducting / discharging passage 12, the piston 1 descends. Then, the tip of the piston 1 is
When the position where the horizontal rotation is not hindered is reached, the lowering of the piston 1 is stopped.

As shown in FIGS. 5 and 6, an upper cover plate 4A in the uniform press forming apparatus is provided with a second fluid guide / discharge passage 24 in the upper plate 4 as shown in FIGS.
And a second fluid conducting / discharging passage 24 opening on the lower surface of the upper plate 4
No opening is provided. Therefore, the structure of the uniform pressure molding apparatus can be simplified as compared with the pressure molding apparatus shown in FIGS. 1 and 2.
A pipe for communicating the fluid guide / discharge passage 24 with the fluid guide / discharge means (not shown), and a second valve such as an electromagnetic valve provided in the middle of the pipe for controlling the pressure of the fluid to the second fluid guide / discharge path 24. No fluid supply means (not shown) to the two-fluid guide / discharge path 24 is required.

In Example 2, the first pressing member of the present invention is formed with the lower plate 2 and preferably formed with the lower plate 2 and the vertically movable piston 1. The second pressing member is formed with the upper cover plate 4A, and preferably, the second pressing member is fixed to the upper cover plate 4A fixed to the upper substrate 3 and the lower surface of the upper cover plate 4A. And a pressure equalizing member formed of the fluid-tight bag 6A mounted on the lower surface of the upper lid plate 4A and the sealed fluid 10A filled in the fluid sealed space 33A. You.

Further, in Example 2, the pressing member of the present invention is formed with the lower plate 2, and is preferably formed with the lower plate 2 and the vertically movable piston 1. The fixing member is an upper cover plate 4 whose position is fixed.
A, preferably with an upper lid plate 4A fixed to the upper substrate 3 supported by a column 13 erected on the upper surface of the lower substrate 8, and a pressure uniforming member. But,
The fluid-tight bag 6A mounted on the lower surface of the upper lid plate 4A
And the sealed fluid 1 filled in the fluid sealed space 33A.
0 is formed.

In the second embodiment, members other than the upper plate 4, the seal rubber 6, and the second fluid guide / discharge passage 24 used in the first embodiment can be used.

In the second embodiment, the pressure uniformity is obtained by sealing the sealed fluid 10 in a fluid-tight space 33A formed in a fluid-sealed bag 6A formed in a bag shape by a flexible elastic member. Although a member is employed, a second fluid conducting / discharging channel 24 is provided as in Example 1 above, and the sealed fluid 10 is filled in the fluid-tight bag 6A via the second fluid conducting / discharging channel 24 during pressure molding. In order to be able to press-fit, a pressure equalizing member is provided in a fluid-sealed bag, which is a bag formed of the flexible elastic member capable of being filled with a fluid, and in the bag during pressure molding. It can also be formed with the fluid to be filled.

Example 3 Hereinafter, still another specific example of the present invention will be described.

As shown in FIG. 7, a uniform pressure molding apparatus, which is a specific example of the pressure molding apparatus of the present invention, has a piston 1
Lower plate 2, upper lid plate 4 </ b> A fixed to upper substrate 3,
It has a middle plate 5 and a pressure uniforming rubber 6B which is a lump-shaped flexible elastic member.

In the third embodiment, members other than the fluid-tight bag 6A used in the second embodiment can be used.

The pressure uniforming rubber 6B is made of a material having a soft elastic force and pressure resistance.
Is a cylindrical body having substantially the same diameter as. An end 32B of the pressure uniforming rubber 6B has an outer peripheral surface along the inner peripheral surface of the backup ring 30. In addition, a protective rubber 34 is attached to the surface on the small diameter portion 26 side of the pressure uniforming rubber 6B.

In Example 3, the pressure equalizing rubber 6B corresponds to the pressure equalizing member in the present invention.
When the pressure uniforming rubber 6B and the protective rubber 34 are integrated with each other, and when the molded article 18 to be pressed is pressed by the protective rubber 34, the pressure uniforming rubber 6B is A surface pressure due to a reaction force is generated between the pressure-molded product 18 and the pressure-molded product 18.
Even if there is a step between the surface of the mold rubber 20 and the upper surface of the molded object 18, the protective rubber 34 integrated with the pressure uniforming rubber 6 </ b> B Since it is in close contact with the upper surface of the compact 18, the compact 18 can be uniformly press-molded by the integrated pressure uniforming rubber 6 </ b> B and the protective rubber 34.

(General Description) The pressure molding apparatus of the present invention has a first pressure member, a second pressure member, and a pressing force equalizing member.

In the present invention, at least one of the first pressing member and the second pressing member is formed so as to be movable toward the other, and press-molds a press-formed product with mutual clamping pressure. It is a member that can be. The first pressing member and the second pressing member are not particularly limited as long as they can apply a mutual squeezing pressure to the press-formed product, and one pressing member is used for the other pressing member. The first pressing member and the second pressing member may be formed so as to move toward the pressing member, or may be formed so as to move toward each other.

The shape of the first pressure member and the second pressure member is appropriately selected depending on the shape of the apparatus or the shape of the article to be pressed, for example, the first pressure member described in the above specific description. The shape of the member may be cylindrical or prismatic, and is not particularly limited. In addition, appropriately selecting the shapes of the first pressing member and the second pressing member so that the pressure receiving area is reduced as much as possible depending on the shape of the molded product to be pressed requires production efficiency,
It is preferable from the viewpoint of downsizing of the device.

The pressing force equalizing member according to the present invention is interposed between the first pressing member and the second pressing member, and has a surface facing at least a flexible object at least a soft elastic member. The pressing force equalizing member is configured such that when the first pressurizing member and the second pressurizing member sandwich the pressurized molded product, the pressurized product in the pressurized molded product is pressed. A uniform pressure can be applied to the surface.

Examples of the material of the flexible elastic member include natural rubber, SBR, BR, IR, CR, IIR, E
Synthetic rubber such as PM and EPDM, acrylonitrile butadiene rubber, silicone rubber, fluoro rubber, chlorosulfonated polyethylene, chlorinated polyethylene, chlorinated butyl rubber, polysulfide rubber, urethane rubber, acrylic rubber, epichlorohydrin rubber, polypropylene oxide, ethylene vinyl acetate Specific synthetic rubbers such as copolymers, thermoplastic rubbers, plastics having soft elasticity, sponges, foamable resins, and the like can be given.

In the present invention, the molded article to be pressed is
When pressurized by these while pressing between the pressing member and the second pressing member, that is, when pressing between the first pressing member and the second pressing member, A uniform pressing force is applied between the first pressing member and the second pressing member so that a uniform clamping force is applied to a surface in contact with either the first pressing member or the second pressing member. Forming member is interposed. The pressure equalizing member has a function of applying a uniform pressure to the press-formed product at the time of pinching, and can adhere to the pressurized surface of the press-formed product to damage the press-formed product. Has at least a function that does not.

In order to realize this function, it is necessary that the pressing force equalizing member has at least a surface facing the molded object to be pressed formed of a soft elastic member. This pressure equalizing member can take various forms as long as the surface facing the article to be pressed is formed of at least a soft elastic member. Some of the possible forms of the pressure equalizing member are exemplified by the above-described embodiment.

Again, this pressure uniforming member may be entirely formed of a flexible elastic member in a block, or may be formed of at least a flexible elastic member on the surface facing the pressed body. Other portions may be formed so as to be able to be filled with a fluid, or may be formed in a space filled with a fluid. Specifically, (a) a mode in which a lump-shaped flexible elastic member is interposed between a molded product to be pressed and the first pressing member or the second pressing member; A lump-shaped flexible elastic member heading toward a pressed product, and a mounting support member capable of attaching the lump-shaped flexible elastic member to the first pressing member or the second pressing member. (C) a film-like flexible elastic member heading toward the article to be pressed, and filling between the film-like flexible elastic member and the first pressing member or the second pressing member. (D) a bag formed of the flexible elastic member capable of filling the inside with a fluid, and a fluid filled in the bag during pressure molding. Form
(E) a bag made of the flexible elastic member formed in a liquid-tight manner;
Examples include a form formed with a fluid filled in the inside of the bag body.In the case where the fluid is used for the pressure equalizing member, the inside of the bag is filled in advance during pressure molding. The pressure equalizing member may be formed so that the fluid can be further press-fitted in addition to the set fluid, or the fluid can be sealed in advance in the bag made of the flexible elastic member. Alternatively, the pressure uniformizing member may be formed.

The pressing force equalizing member may be mounted on either the first pressing member or the second pressing member, and may be provided on the first pressing member and the second pressing member. The first and second pressing members may be mounted on the first pressing member and the second pressing member without being mounted on the first pressing member or the second pressing member. It may be held so as to be interposed in the device. Further, the pressure equalizing member may be arranged on the surface to be pressed of the article to be pressed, or may be arranged so as to sandwich the article to be pressed.

The pressing member according to the present invention is not particularly limited as long as it is formed so that pressure can be applied to the press-formed product, and the pressing member moves by the pressure due to the press-fitting of the fluid to move the press-formed product. It may be formed to press,
It may be formed so as to be moved by mechanical power or mechanical driving force to press the molded article to be pressed.

The fixing member according to the present invention is not particularly limited as long as it is immovable when applying pressure to the article to be pressurized. It may be formed so as to be movable after applying pressure to the compact.

[0086] The molded article under pressure in the present invention includes:
As long as it can be molded by pressing, such as powder, sheet, a molding precursor of a multi-layered product, a temporarily compressed product,
There is no particular limitation.

[0087]

According to the present invention, it is possible to maintain the production efficiency in the conventional method of crimping with a rigid body, and to perform the addition without the strict adjustment and management of the parallelism as in the prior art. Uniform pressure can be applied to the compact,
When there is no pressure bonding failure, and when the pressed object is a laminate formed by laminating a plurality of green sheets, no molding failure or layer peeling occurs, especially in the temporary pressure bonding step of the laminate. It is possible to provide a pressure molding apparatus that can achieve both excellent productivity and prevention of poor pressure bonding.

[Brief description of the drawings]

FIG. 1 is an enlarged front longitudinal sectional view of a pressure molding apparatus showing an example of the present invention.

FIG. 2 is an enlarged front longitudinal sectional view of a pressure molding apparatus showing an example of the present invention.

FIG. 3 is a plan view of a pressure molding apparatus showing an example of the present invention.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is an enlarged front vertical cross-sectional view of a uniform pressure molding apparatus showing another example of the present invention.

FIG. 6 is an enlarged front vertical cross-sectional view of a uniform pressure molding apparatus showing another example of the present invention.

FIG. 7 is an enlarged front vertical sectional view of a uniform pressure molding apparatus showing still another example of the present invention.

[Explanation of symbols]

1 ... piston, 2 ... lower plate, 3 ... upper substrate,
4 ・ ・ ・ top plate, 4A ・ ・ ・ top cover plate, 5 ・ ・ ・ middle plate, 6 ・
..Seal rubber, 6A ... fluid-tight bag, 6B
・ Pressure equalizing rubber, 7 ・ ・ ・ Hydraulic cylinder, 8 ・ ・
・ Lower substrate, 9 ... opening, 10 ... fluid, 10A
... filled fluid, 11 ... first fluid guide / discharge path, 12
..First gas guide / exhaust passage, 13 ... post, 14 ... transfer arm, 15 ... rotary motor, 16 ... transfer stand, 17 ... through hole, 18 ... Pressed product, 19
... Transfer plate, 20 ... Type rubber, 21 ... Through hole, 22 ... O-ring, 23 ... Concave mounting hole, 24
... Second fluid guide / exhaust passage, 25 ... Mounting through hole, 26
... Small diameter part, 27 ... End face part, 28 ... Upper taper part, 29 ... Lower taper part, 30 ... Backup ring, 31 ... Thick diameter part, 32 ... Folding part ,
32A ··· end, 32B ··· end, 33 ··· fluid storage space, 33A ··· fluid enclosing space, 34 ··· protective rubber, 35 ··· second gas conduction / exhaust passage, 36 · ..Heating heater, 37 ... Preheating means.

Claims (6)

[Claims] A first pressing member and a second pressing member, each of which is formed so as to be movable toward at least one of the other and capable of pressing and forming a pressed object with mutual clamping pressure; A pressing force equalizing member interposed between the first pressing member and the second pressing member, and having a surface facing the pressed object formed of a soft elastic member; A pressure molding device, comprising: 2. The pressure equalizing member according to claim 1, wherein the pressure equalizing member is a film-shaped flexible elastic member directed toward the molded article to be pressed, and the film-shaped flexible elastic member and the first pressing member or the second pressing member. The pressure molding device according to claim 1, wherein the pressure molding device is formed by a fluid filled between the pressure molding device and the fluid. 3. The pressure equalizing member is formed of a bag formed of the flexible elastic member capable of filling a fluid therein, and a fluid filled in the bag during pressure molding. The pressure molding device according to claim 1, wherein the pressure molding device comprises: 4. The pressure equalizing member according to claim 1, wherein the pressure equalizing member is formed by a liquid-tight bag made of the flexible elastic member, and a fluid filled in the bag. The press forming apparatus according to the above. 5. The pressure molding apparatus according to claim 1, wherein the pressure equalizing member is formed of a lump-shaped flexible elastic member. 6. The first pressing member is formed such that a surface facing the second pressing member is capable of disposing a pressurized molded product,
A pressing member formed so as to be able to move up and down toward the second pressing member; the second pressing member being a fixed member formed so as not to be movable; The pressure molding device according to any one of claims 1 to 5, wherein the pressure molding device is provided on a surface of the fixing member facing the pressing member.