JP2002011791A - Pressure molding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure molding device reduced in the cost of maintenance. SOLUTION: In the pressure molding device, wherein an object member 14 to be pressurized is pressure-bonded and molded by a pinching pressure through a pair of pressurizing members 8, 10 at least either one of which is movable to the other while having a flexible elastic body 13, pushed against the object member 14 and interposed between a pair of the pressurizing members 8, 10, the flexible elastic body 12 is constituted of a main body unit 26 pushed against the object member 14 and an annular peripheral rim part 28 mounted detachably on the outer periphery of the main body unit 26. According to this constitution, only the outer peripheral rim of the flexible elastic body 12, which is susceptible to a crack or a cutout, can be exchanged properly whereby the cost of maintenance for the flexible elastic body 12 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a pressure molding apparatus.

[0002]

2. Description of the Related Art A multilayer ceramic capacitor, an alumina multilayer wiring board, and the like are manufactured, for example, by press-forming a member to be pressed in which a plurality of sheets are stacked by a mechanical press method or the like.

When a member to be pressed having such a laminated structure is press-formed, if the member to be pressed is pressed unevenly, each sheet due to poor molding or poor press-bonding between the above-mentioned sheet materials is obtained. Boundary separation between materials occurs.

[0004] Therefore, as a pressure forming apparatus for press-forming a member to be pressed having a laminated structure as described above, an elastic body made of rubber or the like is interposed between a pair of upper and lower pressing members sandwiching the member to be pressed. Conventionally, there has been widely known a structure in which the elastic member is attached to the object to be pressed so that the member to be pressed is pressed and formed with a uniform pressure (for example, in Japanese Patent Application Laid-Open No. H11-157556). See Japanese Unexamined Patent Publication No. 10-85996.

[0005]

By the way, in recent years, a pressure molding technique at a high surface pressure of, for example, about 49 MPa has been required.

[0006] When the member to be pressed is pressed under such a high surface pressure, a large compressive load also acts on the above-mentioned elastic body, and this elastic body is greatly crushed and this elastic body is crushed. The outer peripheral portion of the body is extruded in a direction orthogonal to the direction of pressing against the member to be pressed.

For this reason, the outer peripheral portion of the elastic body extruded in a direction perpendicular to the direction in which the elastic body is pressed against the pressed member,
Interference with other members of the pressure molding device adjacent to the elastic body, or intrusion into a gap created around the elastic body, cracks or chips are generated in the outer peripheral portion of the elastic body, There is a possibility that the durability of the elastic body is significantly deteriorated.

[0008]

SUMMARY OF THE INVENTION In view of the above, the present invention is directed to a pressure forming method in which a member to be pressed is pressed and formed with a clamping force between a pair of pressing members at least one of which is movable toward the other. An apparatus, wherein a flexible elastic body pressed against the pressed member is interposed between the pair of pressing members, wherein the flexible elastic body is pressed against the pressed member. And an annular peripheral portion detachably mounted on the outer periphery of the main body. When the flexible elastic body is pressed against the member to be pressed, the flexible elastic body is crushed, and an outer peripheral portion of the flexible elastic body is pushed out in a direction orthogonal to a direction in which the flexible elastic body is pressed against the member to be pressed. If there is a gap around the flexible elastic body, the outer peripheral portion of the extruded flexible elastic body penetrates into the gap and causes cracks or chips.

[0009] Thus, in the flexible elastic body, only the outer peripheral portion where cracks and chips are likely to occur, that is, only the peripheral edge portion can be appropriately replaced. The peripheral portion comprises a plurality of annular members detachably mounted on the outer periphery of the main body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the pressure forming apparatus 2 includes a mounting portion 6 to which rod-shaped lifting guides 4 and 4 are attached, and a lower pressing member 8 provided in the mounting portion 6. An upper pressing member 10 fixed to the lifting guides 4 at a position above the lower pressing member 8, and a rubber-made member interposed between the upper pressing member 10 and the lower pressing member 8. A flexible elastic body 12,
Approximately.

The lower pressing member 8 can be moved up and down along the lifting guides 4 and 4 by hydraulic control or the like, that is, it can move toward the upper pressing member 10.

A table 1 on which a member 14 to be pressed formed by laminating a plurality of sheets to form a multilayer ceramic capacitor or the like is set on the lower pressing member 8.
6 is fixed.

The upper pressing member 10 is spaced at a predetermined interval,
A side wall 18 surrounding the flexible elastic body 12 is attached.

The side wall 18 is connected to the upper pressing member 10 via a spring element 20. When the tip of the side wall 18 comes into contact with the table 16, the side wall 18 is moved downward by the action of the spring element 20. It is configured to retreat by a predetermined amount toward the upper pressing member 10 along the vertical direction of the pressing member 8.

On the inner peripheral side of the tip of the side wall 18,
A projection 22 is formed.

Reference numeral 24 denotes a metal plate having the same outer shape as the flexible elastic body 12 and fixed to the upper pressing member 10.

As shown in FIGS. 3 and 4, the flexible elastic body 12 has a substantially rectangular plate-shaped main body 2 which is pressed against the member 14 to be pressed.
6 and an annular peripheral portion 28 detachably mounted on the entire outer periphery of the main body 26.

The main body 26 has an outer shape of the pressed member 1.
4 is formed to be larger than the flexible elastic body 1.
When the second member 2 is pressed against the pressed member 14, only the main body 26 of the flexible elastic body 12 comes into contact with the pressed member 14.

Since the peripheral portion 28 is pressed into the outer periphery of the main body 26, the peripheral portion 28 is in close contact with the main body 26 by the contraction force of the peripheral portion 28 itself, and is fixed to the main body 26.

The projection 22 at the end of the side wall 18 abuts on the outer peripheral side of the end surface of the peripheral portion 28 facing the table 16 and is supported so that the flexible elastic body 12 does not drop to the lower pressing member 8 side. .

In the pressure forming apparatus 2, since the flexible elastic body 12 is crushed when the member to be pressed 14 is compression-molded, the flexible elastic body 12 and the side wall 18 are surrounded around the flexible elastic body 12. , Or a minute gap between the end of the side wall 18 and the table 16 or the like, the flexible elastic body 12 enters these gaps.

At this time, the peripheral edge portion 28 constituting the outer peripheral portion of the flexible elastic body 12 mainly penetrates into these gaps, and the outer peripheral portion of the flexible elastic body 12, that is, the peripheral portion 2
8 may cause damage such as cracks or chips.

In the pressure molding apparatus 2 configured as described above, the peripheral portion 28 of the flexible elastic body 12 that is more easily damaged than the main body 26 of the flexible elastic body 12 is detachable from the main body 26. Has become. Therefore, only the peripheral portion 28 can be replaced as appropriate according to the state of breakage, so that the maintenance cost of the flexible elastic body 12 can be significantly reduced.

Next, different embodiments of the present invention will be described. The following embodiments are basically the same as the above-described first embodiment except for the configuration of the flexible elastic body. When components (not shown) are described again in the text, the above-described first embodiment is used. The same reference numerals as in the embodiment are assigned and the description is omitted.

FIG. 5 shows a second embodiment of the present invention.
In the second embodiment, a flexible elastic body 30 is provided with a substantially rectangular plate-shaped main body portion 34 having a convex portion 32 formed over the entire periphery of a side surface, and a substantially rectangular cross section fitted into the convex portion 32. And an annular peripheral portion 36 in the shape of a letter.

That is, the main body 34 has an outer peripheral edge on the upper pressing member 10 side (upper in FIG. 5) of the main body 34 and an outer peripheral edge on the lower pressing member 8 side (lower in FIG. 5) of the main body 34. And are formed in a notched shape over the entire circumference,
The protrusion 32 is formed on the outer periphery of the main body 34.

The main body 34 is formed so that its outer shape is larger than the member 14 to be pressed, and when the flexible elastic body 30 is pressed against the member 14 to be pressed, the flexible elastic body 30 is pressed. Only the main body part 30 of 30 contacts the member to be pressed 14.

In the second embodiment, the peripheral portion 36 press-fitted into the main body 34 is
Is configured to fit. Therefore, the periphery 36
Is the contraction force of the peripheral portion 36 itself and the convex portion 32 of the main body portion 34.
By doing so, it is more securely fixed to the main body, and does not drop off from the main body 34 in the vertical direction in FIG.

FIG. 6 shows a third embodiment of the present invention. In the third embodiment, the flexible elastic body 38 is
A main body 40 similar in shape to the main body 34 of the second embodiment described above.
The first peripheral portion 42 pressed into the outer peripheral edge of the main body 40 on the upper pressing member 10 side (upper in FIG. 6), and the first peripheral portion 42 on the lower pressing member 8 side of the main body 40 (lower in FIG. 6). And a second peripheral portion 44 press-fitted to the outer peripheral edge.

Then, the flexible elastic body 38 is
When pressed against the main body 40 of the flexible elastic body 38,
The main body 40 is formed such that only the member to be pressed 14 contacts the member to be pressed 14.

In the third embodiment constructed as described above, the first peripheral edge 42 and the second peripheral edge 44 are individually formed in accordance with the respective damaged states of the first peripheral edge 42 and the second peripheral edge 44. Can be replaced as appropriate. That is, the outer peripheral portion of the flexible elastic body 38 that is easily damaged can be efficiently replaced, and the maintenance cost can be reduced more effectively.

FIG. 7 shows a fourth embodiment of the present invention. In the fourth embodiment, a flexible elastic body 46 is provided with a substantially rectangular plate-shaped main body 48 cross-linked to the metal plate 24,
An annular peripheral portion 50 is attached to the outer periphery of the main body 48.

The flexible elastic body 46 has an overall outer shape substantially the same as that of the metal plate 24, and is formed in a substantially square shape.

The main body 48 has an outer shape of the pressed member 1.
4 is formed to be larger than the flexible elastic body 4.
When the member 6 is pressed against the member 14 to be pressed, only the main body 48 of the flexible elastic body 46 comes into contact with the member 14 to be pressed.

The peripheral portion 50 is in contact with the metal plate 24 but is not fixed to the metal plate 24, and is pressed into the outer periphery of the main body portion 48, whereby the contraction force of the peripheral portion 50 itself is used. It is in close contact with the main body 48 and is fixed to the main body 48.

In the flexible elastic body 46 of the fourth embodiment having the above-described structure, only the peripheral portion 50, which is more easily damaged than the main body 48, can be appropriately replaced.

In the fifth embodiment shown in FIG. 8, the main body 54 of the flexible elastic body 52 is joined to the metal plate 24 by cross-linking, but the lower pressing member 8 side (see FIG. An outer peripheral edge (below 8) is cut out, and an annular peripheral portion 56 is attached to the cutout portion.

That is, an outer peripheral edge of the main body 54 on the upper pressing member 10 side is interposed between the peripheral edge 56 of the flexible elastic body 52 and the metal plate 24, and the peripheral edge 56 of the flexible elastic body 52 is It is configured not to directly contact the plate 24.

In the sixth embodiment shown in FIG. 9, a substantially rectangular metal plate 5 fixed to an upper pressing member 10 with bolts is used.
8, a concave portion 60 is formed, and a main body portion 64 of a flexible elastic body 62 pressed against the member to be pressed 14 is cross-linked to the concave portion 60. An annular peripheral portion 66 is attached to the outer peripheral edge of the main body 64 on the lower pressing member 8 side (the lower side in FIG. 9).

The cross-sectional area of the concave portion 60 on a plane orthogonal to the direction in which the flexible elastic body 62 is pressed against the member 14 to be pressed (the vertical direction in FIG. 9) is changed from the bottom surface 68 side of the concave portion 60 to the opening side of the concave portion 60. The cross section along the direction in which the flexible elastic body 62 is pressed against the pressurized member 14 (the vertical direction in FIG. 9) is formed in a substantially equilateral trapezoidal shape so as to gradually increase toward.

The opening edge of the concave portion 60 of the metal plate 58 is
It is rounded and formed smoothly over the entire circumference.

The main body portion 64 of the flexible elastic body 62 has an outer peripheral side surface 70 separated from the side wall surface 72 of the concave portion 60, and an annular groove along the concave portion 60 opening on the inner peripheral side of the concave portion 60 opening. 74 are formed.

That is, the peripheral edge 66 of the flexible elastic body 62 mounted on the main body 64 of the flexible elastic body 62 is located in the groove 74.

The volume of the flexible elastic body 62 composed of the main body 64 and the peripheral edge 66 is set to be larger than the volume of the concave portion 60 of the metal plate 58.

In the above-described fourth to sixth embodiments, unlike the above-described first to third embodiments, each body 4
The projections 22 do not necessarily need to be provided on the inner peripheral side of the tip of the side wall 18 because the 8, 54, 64 are bridged and joined to the metal plates 24, 58.

In each of the above-described embodiments, the main body and the peripheral portions of the flexible elastic members 12, 30, 38, 46, 52, and 62 are made of the same rubber material. May be formed of a rubber material different from the body of the flexible elastic body.

For example, by using a rubber material having a higher strength than the main body for the peripheral portion, the frequency of replacement of the peripheral portion can be reduced, and the maintenance cost can be reduced.

If a rubber material that is less expensive than the rubber material used for the main body is used for the peripheral portion, the frequency of replacement of the peripheral portion may increase, but the cost of the peripheral portion is low,
The maintenance cost of the rubber elastic body can be relatively reduced.

In each of the above-described embodiments, the rubber material of each of the flexible elastic bodies 12, 30, 38, 46, 52, and 62 includes natural rubber, isoprene rubber, butadiene rubber, chloroprene rubber, butyl rubber, and styrene butadiene. Use rubber, nitrile rubber, hydrogenated nitrile rubber, ethylene propylene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, acrylic rubber, polysulfide rubber, silicone rubber, fluorine rubber, urethane rubber, ethylene vinyl acetate rubber, etc. Is desirable. Further, as the material of the flexible elastic body, styrene-based, olefin-based, diene-based, vinyl chloride-based, urethane-based, ester-based, acid-based, or fluorine-based thermoplastic elastomers can be used. Even when such a thermoplastic elastomer is used, the main bodies of the flexible elastic bodies 46, 52, 62 in the fourth to sixth embodiments are cross-linked to the metal plates 24, 58.

In each of the above-described embodiments, the outer shape of the metal plates 24 and 58 is not limited to a square, but may be rectangular or circular. It is not limited to a rectangle as in each of the embodiments described above.

[0052]

According to the present invention, the outer peripheral portion of the flexible elastic body, which is liable to cause damage such as cracks or chips when the member to be pressed is compression-formed, is pressed against the member to be pressed as a peripheral edge. Since it is detachably attached to the outer periphery of the main body of the flexible elastic body, only the peripheral portion can be replaced,
The maintenance cost of the flexible elastic body can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is an overall view of a pressure molding apparatus according to the present invention.

FIG. 2 is an enlarged view of a main part of the pressure molding apparatus according to the present invention.

FIG. 3 is a plan view of a flexible elastic body.

FIG. 4 is a sectional view taken along the line AA of FIG. 3;

FIG. 5 is a sectional view of a flexible elastic body according to a second embodiment.

FIG. 6 is a sectional view of a flexible elastic body according to a third embodiment.

FIG. 7 is a sectional view of a flexible elastic body and a metal plate according to a fourth embodiment.

FIG. 8 is a sectional view of a flexible elastic body and a metal plate according to a fifth embodiment.

FIG. 9 is a sectional view of a flexible elastic body and a metal plate according to a sixth embodiment.

[Explanation of symbols]

 8 Lower pressing member 10 Upper pressing member 12 Flexible elastic body 14 Pressed member 26 Main body 28 Peripheral edge

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroyuki Utsugi 330 No., Naganuma-cho, Inage-ku, Chiba-shi, Chiba F-term (in reference) 4E088 AB04 DA07 EA10 GA04 4F204 AG03 AM32 FA01 FB01 FB22 FN11 FQ01 FQ15 4F211 AD03 AD04 AG03 AH33 TA13 TC01 TD11 TQ04

Claims (2)

[Claims] 1. A pressure forming apparatus for press-forming a member to be pressed by a pressure of a pair of pressing members at least one of which is movable toward the other, wherein the elastic member is pressed against the member to be pressed. In a pressure molding device in which a body is interposed between the pair of pressure members, the flexible elastic body is detachably attached to a main body pressed against the member to be pressed and an outer periphery of the main body. A pressure molding device, comprising: an annular peripheral portion. 2. The pressure molding apparatus according to claim 1, wherein the peripheral portion comprises a plurality of annular members detachably mounted on an outer periphery of the main body.