JP3000311U - Sheet material and gasket using the same - Google Patents

Abstract

(57) [Summary] [Structure] The sheet material S is composed of a beater sheet 1 and a soft metal foil 2 provided on at least one surface thereof.
For the gasket G, the sheet material S is placed on the receiving mold so that the surface provided with the soft metal foil 2 faces upward, and the die is pressed from the soft metal foil side to the opposite side to cut the sheet material. It is created by [Effect] The soft metal foil 2 provided in the surface direction of the beater sheet 1 secures the original non-directional tensile strength of the beater sheet and can increase the tensile strength of the gasket.
Further, since it can be die-cut with a wooden mold, it can be produced at a lower cost. At the time of die-cutting, the soft metal foil 2 substantially covers the cut end of the beater sheet 1 and serves as a barrier against fluid, so that the soft metal foil 2 can be applied to a portion having a higher internal pressure. Therefore, sticking or seizure of the beater sheet 1 can be prevented, and the beater sheet 1 can be deformed in the same manner and the conformability to the flange surface can be secured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheet material for sealing between stationary surfaces, and more particularly to a sheet material formed by using a beater sheet and a gasket using the sheet material.

[0002]

[Prior art]

 As is well known, the beater sheet is made by the same method as the paper making method, so that it has an excellent compressibility, has good conformability to the flange surface, and can be die-cut with a wooden die, which is economical. It has advantages such as excellent properties. On the other hand, it has the drawback that sticking or seizure to the flange surface during use is likely to occur, so when it is intended to be used as a gasket for an internal combustion engine, it should only be applied to limited locations with low internal pressure. This is not possible, and most gaskets for internal combustion engines use joint sheets or gaskets using metal plates.

However, since the fibers in the joint sheet are arranged in the direction of rotation of the roller while being compressed between the rollers and molded, the tensile strength of the joint sheet in the direction of rotation of the roller and the direction orthogonal thereto is increased. Since the difference is large, it was easy for the gasket to have sealing characteristics that differed greatly depending on the method of punching during die-cutting. On the other hand, the metal plate has poor compatibility with the flange surface and requires a separate sealant to prevent fluid from leaking from the flange surface, and is also deformed geometrically (for example, formation of beads). When the surface pressure is secured by the spring property by), it is often impossible to secure the required tightening surface pressure due to deterioration of the material over time during use. In addition, it is necessary to use a mold in order to cut out the joint sheet and the metal plate, and it takes time to prepare it, and it is expensive, so it is not possible to sufficiently follow the design change. It was a thing.

[0004]

[Problems to be solved by the device]

 INDUSTRIAL APPLICABILITY The present invention can improve the tensile strength, and also has the non-directional tensile strength originally possessed by the beater sheet, good compatibility with the flange surface, reduction of manufacturing cost by die cutting using a wooden die, etc. The purpose is to provide a sheet material that can secure the advantages of and make a gasket.

Another object of the present invention is to provide a gasket made of beater sheet, which can prevent sticking or seizure on the flange surface and can exhibit sufficient sealing characteristics even on the flange surface with higher internal pressure. .

[0006]

[Means for Solving the Problems]

 The sheet material according to the present invention comprises a beater sheet and at least one layer of soft metal foil extending in the surface direction of the beater sheet. The soft metal foil may be provided on at least one side of the beater sheet.

The gasket using the sheet material according to the present invention can be formed by die-cutting the sheet material using a wooden die, and the die is pressed from the side provided with the soft metal foil to the opposite side. Alternatively, the bead may be molded around a predetermined opening when die cutting.

[0008]

[Action]

 The soft metal foil extending in the surface direction of the beater sheet does not hinder the die-cutting work using the wooden mold, and the die-cutting can be performed in the same manner as in the beater sheet alone. In addition, since the soft metal foil extends in the surface direction of the beater sheet, it acts to increase the tensile strength of the beater sheet and does not adversely affect the nondirectional tensile strength inherent in the beater sheet.

At the time of die cutting, the soft metal foil hangs down on the cut end of the beater sheet to substantially cover the cut end and acts as a barrier against fluid. The soft metal foil interposed between the beater sheet and the flange surface prevents sticking or seizure on the flange surface of the beater sheet, and also deforms like the beater sheet to ensure the conformability to the flange surface. .

Since the bead sheet has a shape in which the beater sheet is held by the soft metal foil, when the bead sheet is attached between the flange surfaces, the beater sheet is partially broken to reduce the relative density. Prevent.

[0011]

【Example】

 As shown in FIG. 1, the sheet material S used to form the gasket G (FIG. 3) according to the embodiment of the present invention has the soft metal foil 2 in the surface direction (one surface in the case shown) of the beater sheet 1. Has a structure attached thereto.

The beater sheet 1 is made by adding a synthetic rubber latex binder such as NBR to resin fibers such as aramid fibers, uniformly dispersing and depositing the latex on the resin fibers, and then using a paper filter. Although it is a well-known beater sheet formed in a sheet shape by a method similar to the method, it is preferable that the beater sheet is subjected to a dewatering press treatment in order to increase its density. The soft metal foil 2 is made of a soft metal such as copper or aluminum to a thickness of about 50 to 60 μ or less, generally about 30 μ or less. However, this thickness can be appropriately changed depending on the thickness of the beater sheet 1 and the soft metal foil 2, the ductility of the soft metal used for the soft metal foil 2, and the like, for the reason that will be apparent from the following.

Basically, the sheet material S formed as described above is placed on the receiving die D1 such that the soft metal foil 2 is located on the upper surface side of the beater sheet 1, as shown in FIG. Then, the punching die D2 is pushed down into the receiving die D1 to form the gasket G.

At this time, at the cut end of the gasket G, as shown in FIG. 3, the soft metal foil 2 hangs down on the cut end face 3 of the beater sheet 1 as indicated by reference numeral 4 by pushing down the punching die D2. The cut end surface 3 is coated. As a result, the hanging portion 4 prevents fluid from passing through the inside of the beater sheet 1 in the surface direction when the gasket is used, and thus allows application of higher internal pressure to the flange surface. On the other hand, the soft metal foil 2 is bonded to the flange surface F and the bonding surface of the gasket G, so that the original good conformability of the beater sheet is not impaired, and resin fibers (not shown) are exposed on the surface. This prevents the conformability from deteriorating and prevents sticking or seizure on the flange surface. At the same time, the soft metal foil 2 does not hinder the non-directionality of the tensile strength inherent in the beater sheet.

FIGS. 4 to 6 are views showing modified examples of the sheet material S, and FIG. 4 shows the soft metal foil 2 applied to both sides of the beater sheet 1 and the sheet material S of the sheet material S at the time of die-cutting molding. It is not necessary to consider the orientation, and it is possible to completely avoid sticking or seizing on the flange surface and deterioration of conformability during use.

5 and 6, the soft metal foil 2 is applied between each of the plurality of beater sheets 1, and the tensile strength can be further increased non-directionally. Here, the thickness of the gasket G is substantially the same as the thickness of the beater sheet 1, and is smaller than that of the case where a plate member such as a metal plate is used to increase the tensile strength. Note that the spacing between can ensure equivalent sealing. Also in these cases, although not shown, it will be easily understood from the above description that it is preferable to provide the soft metal foil also on the outer surface of the gasket.

FIG. 7 is a view showing a gasket G formed by using the sheet material S shown in FIG. 4, which is formed by die cutting as described above, but a bead B is formed around the opening H. ing.

The portion of the bead B is deformed so as to project from the other plane portion, but the portion of the bead B of the sheet material S is held by the soft metal foil 2 during die cutting. Therefore, the density of the beater sheet 1 is prevented from locally increasing or decreasing due to the deformation stress. Moreover, since the beater sheet 1 at the bead B portion is compressed by the soft metal foil 2 while maintaining its sheet shape when assembled between the flange surfaces, the beater sheet at that portion is destroyed by vibration during use. To prevent local seal leaks.

[0019]

[Effect of device]

 According to the present invention, since the soft metal foil 2 is provided in the surface direction of the beater sheet 1, the tensile strength of the gasket can be increased and the non-directional tensile strength inherent in the beater sheet is not adversely affected. Compared to the case where a synthetic resin layer or a metal plate is attached to increase the tensile strength, the thickness can be made thinner and the beater sheet alone can be used without hindering the die-cutting work using a wooden die. Since it can be die-cut, it is possible to provide a cheaper gasket.

Further, since the soft metal foil 2 substantially covers the cut end of the beater sheet 1 at the time of die-cutting, it acts as a barrier against a fluid, and a gasket that can be applied to a higher internal pressure location can be created. Further, the soft metal foil 2 interposed between the flange surface can prevent sticking or seizure of the beater sheet 1 on the flange surface, and by deforming similarly to the beater sheet 1, the conformability to the flange surface can be improved. Can be secured.

Further, since the beater sheet 1 is held in its sheet shape by the soft metal foil 2, not only can it be prevented from being inadvertently damaged at the time of normal handling, but also at the time of die-cutting into a gasket. It enables beating and can increase the surface pressure due to beating even when it is used.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a sheet material according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a state of die-cutting and molding using the sheet material shown in FIG.

FIG. 3 is a partial cross-sectional view showing a cut end portion of a die-cut gasket.

FIG. 4 is a sectional view similar to FIG. 1, showing a modified example of the sheet material.

FIG. 5 is a sectional view similar to FIG. 1, showing another modification of the sheet material.

FIG. 6 is a sectional view similar to FIG. 1, showing still another modification of the sheet material.

FIG. 7 is a partial cross-sectional view showing a gasket that is die-molded using the sheet material shown in FIG.

[Explanation of symbols]

 1 beater sheet 2 soft metal foil 3 cut end surface 4 hanging portion of soft metal foil B bead G gasket H opening S sheet material

Claims (8)

[Scope of utility model registration request] 1. A sheet material comprising a beater sheet and at least one layer of soft metal foil extending in the surface direction of the beater sheet. 2. A sheet material comprising a beater sheet and at least one layer of soft metal foil extending on at least one surface of the beater sheet in the surface direction. 3. A gasket characterized by being able to be formed by die-cutting a sheet material composed of a beater sheet and at least one layer of soft metal foil extending in the surface direction of the beater sheet with a wooden mold. . 4. A sheet material composed of a beater sheet and at least one layer of soft metal foil extending in the surface direction on at least one side of the beater sheet can be molded by die-cutting with a wooden mold. Gasket characterized by. 5. A sheet material composed of a beater sheet and at least one layer of soft metal foil extending in the surface direction of the beater sheet is punched from a surface side on which the soft metal foil is provided to a facing surface side. A gasket characterized by being made by pressing. 6. A sheet material comprising a beater sheet and at least one layer of a soft metal foil extending in the surface direction on at least one surface of the beater sheet, and a soft metal foil is provided on the opposite side from the surface side provided with the soft metal foil. A gasket characterized by being produced by pressing a cutting die to the side. 7. A sheet material composed of a beater sheet and at least one layer of soft metal foil extending in the surface direction of the beater sheet, wherein a soft metal foil is formed so that a bead is formed around a predetermined opening. A gasket, which is produced by pressing a punching die from a surface side provided to an opposite surface side. 8. A sheet material composed of a beater sheet and at least one layer of soft metal foil extending in the surface direction on at least one side of the beater sheet so that beads are formed around a predetermined opening. A gasket formed by pressing a punching die from the surface side on which the soft metal foil is provided to the opposing surface side.