JP2002102619A - Method and apparatus for manufacturing filter gasket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a filter gasket, wherein a mesh 52 comprising metal fibers or synthetic fibers and a gasket main body made of a rubbery elastic material are integrated, by inserting the mesh 52 in the cavity 5 of a mold for molding the gasket main body and molding the gasket main body in such a state that the mesh 52 is pressed by the mesh pressing part 6 of the mold and capable of suppressing the generation of the gaps due to the meshes of the mesh 52 when the mesh 52 is pressed by the mesh pressing part 6 to prevent the generation of rubber intrusion in a product. SOLUTION: The mesh pressing part 6 is formed from an elastic material such as a resin or rubber and the gasket main body is molded in such a state that the mesh 52 is elastically pressed by the mesh pressing part 6 made of the elastic material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasket which is a kind of a sealing device, and more particularly to a method and an apparatus for manufacturing a filter gasket having a mesh filter.

[0002]

2. Description of the Related Art Conventionally, a filter gasket 51 shown in FIG. 4 has been known, and is configured as follows.

[0003] First, a mesh 52 constituting a filter is provided, and a gasket main body 53 made of a rubber-like elastic material is integrally fixed to a peripheral portion of the mesh 52. As shown in a partially enlarged manner in FIG. 5, the mesh 52 is made of a fibrous material 5 made of metal fiber, synthetic fiber, or the like.
4 is a mesh-shaped part in which the fiber material 5 is knitted vertically and horizontally.
4 having a thickness t larger than the thickness d (d <
t) has a three-dimensional structure.

In manufacturing the filter gasket 51, as shown in FIG. 6, a molding die 61 is used. When the gasket main body 53 made of a rubber-like elastic material is vulcanized by the molding die 61, the molding die 61 is used. 61 cavities 6
The gasket main body 53 is formed while the mesh 52 is inserted into the mold 2 and the mesh 52 is pressed by the mesh pressing portion 63 of the forming die 61, and the gasket main body 53 and the mesh 52 are integrated simultaneously with the forming.

However, in this conventional manufacturing method or manufacturing apparatus, since the mesh holding portion 63 provided in the cavity 62 of the molding die 61 is formed of a highly rigid metal material, the following inconveniences occur. Has occurred.

That is, as described above, when the mesh 52 made of metal fibers or synthetic fibers is pressed by the metal mesh pressing portion 63, as shown in FIG. Does not elastically deform, and its pressing surface 63a remains flat. Therefore, due to the three-dimensional structure of the mesh 52 due to d <t, a gap 64 is necessarily formed by the stitches of the mesh 52. In this state, when the rubber material 53A for molding the gasket main body 53 is filled in the cavity 62, a part 53A thereof is formed. 'Penetrates into the gap 64 and the rubber is generated around the product. And when the rubber around the product occurs like this,
Since the opening area of the mesh 52 is smaller than the design value, there may be inconvenience in product functions.
If the rubber wrapped around the stitches is peeled off, it becomes foreign matter, which may cause a problem of foreign matter mixing.

[0007]

SUMMARY OF THE INVENTION In view of the above, the present invention can suppress the generation of a gap due to the mesh of the mesh when the mesh is pressed by the mesh pressing portion of the molding die. An object of the present invention is to provide a method and an apparatus for manufacturing a filter gasket capable of suppressing occurrence of rubber rotation.

[0008]

In order to achieve the above object, a method of manufacturing a filter gasket according to claim 1 of the present invention comprises the steps of: combining a mesh made of metal fibers or synthetic fibers with a gasket body made of a rubber-like elastic material. A method of manufacturing an integrated filter gasket, wherein the mesh is inserted into a cavity of a molding die for molding the gasket main body, and the gasket main body is held in a state where the mesh is pressed by a mesh pressing portion of the molding die. In the method of manufacturing a filter gasket for forming, the mesh holding portion is formed of an elastic material such as resin or rubber, and the gasket main body is formed in a state where the mesh is elastically pressed by the elastic material holding portion. Is performed.

According to a second aspect of the present invention, there is provided an apparatus for manufacturing a filter gasket, wherein a mesh holding portion of a mold is formed of an elastic material such as resin or rubber in order to carry out the manufacturing method of the first aspect. That is, an apparatus for manufacturing a filter gasket obtained by integrating a mesh made of metal fibers or synthetic fibers and a gasket body made of a rubber-like elastic material, wherein a cavity of a molding die for molding the gasket body In a filter gasket manufacturing apparatus in which the mesh is inserted into the mold and the gasket main body is formed while the mesh is pressed by the mesh press section of the forming die, the mesh pressing section of the forming die is made of an elastic material such as resin or rubber. It is characterized by being formed of a material.

When the mesh holding portion of the molding die is made of an elastic material such as resin or rubber as in the manufacturing method according to claim 1 or the manufacturing apparatus according to claim 2 of the present invention having the above configuration, When the mesh pressing portion made of an elastic material presses the mesh, it is elastically deformed in accordance with the magnitude of the pressing force and adheres to the mesh along the mesh stitch. Therefore, the gap formed by the mesh of the mesh is closed by the elastic mesh holding portion by the elastic deformation.

The proposal includes the following technical items.

That is, one manufacturing method proposed by the present application is to form a filter gasket in which a mesh of metal or synthetic fiber or the like and a rubber are integrated with each other, and to make the mesh holding portion of the forming die have elasticity such as resin or plastic. This is a manufacturing method characterized in that a material (also referred to as an elastic material) is used and a mesh is pressed up and down to eliminate a gap formed in a stitch, and that rubber does not turn around the stitch during rubber molding.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross section of a main part of a manufacturing apparatus used for carrying out the manufacturing method according to the embodiment of the present invention and a main part of the manufacturing apparatus according to the embodiment of the present invention. It is shown enlarged.

This manufacturing apparatus is for manufacturing the filter gasket 51 shown in FIG. 4 and is configured as follows.

First, there is provided a molding die 1 having a plurality of split dies composed of an upper die 2 and a lower die 3 which come into contact with and separate from each other with the operation. A cavity 5 for molding a gasket body 52 made of a rubber-like elastic material is provided. The cavity 5 is provided with a pair of upper and lower mesh pressing portions 6 for pressing the mesh 52, and each of the mesh pressing portions 6 is formed of an elastic material such as resin or rubber. In the example of the figure, the mesh holding portion 6
Is made of silicon from the viewpoint of heat resistance and strength. Moreover, the hardness was Hw55 by actual measurement.

When the gasket main body 53 made of a rubber-like elastic material is vulcanized and formed, the mesh 52 is inserted into the cavity 5 and a pair of mesh holding portions 6 are formed.
The gasket main body 53 is formed while the mesh 52 is pressed from both sides thereof, and the gasket main body 53 and the mesh 52 are integrated at the same time as this forming. As shown in FIG. 2, when the mesh pressing portion 6 made of an elastic material presses the mesh 52 from both sides as shown in FIG. 2, the mesh 52 is elastically deformed according to the magnitude of the pressing force. Along the stitch of the mesh 52 from both sides thereof. Therefore, mesh 5
Because the mesh holding portion 6 made of the elastic material closes the gap generated by the stitch 2 by elastic deformation,
The rubber material 53A for molding the gasket main body 53 does not enter the gap, so that it is possible to prevent the rubber around the product from being generated.

As shown in FIG. 3, the pressing surface 6a of the mesh pressing portion 6 made of an elastic material is formed to be flat, and when pressed, elastically deforms along the stitches of the mesh 52 so as to come into close contact with the mesh 52. However, when the specifications of the mesh 52 to be used are determined in advance, irregularities corresponding to the stitches of the mesh 52 may be formed in advance on the pressing surface 6a of the mesh holding portion 6 made of an elastic material. Thereby, the adhesion at the time of pressing can be further enhanced.

In the case where irregularities corresponding to the stitches of the mesh 52 are previously formed on the pressing surface 6a of the mesh holding portion 6 made of an elastic material, the mesh 52
When the mesh 52 is set by inserting the stitches, the mesh 52 may be accurately positioned by engaging the stitches of the mesh 52 with the irregularities. When the material of the mesh 52 is, for example, stainless steel (SUS304), the size of the stitch of the mesh 52 is #
It is about 60, and accordingly, unevenness is formed on the pressing surface 6a of the mesh pressing portion 6 made of an elastic material.

It is also conceivable to roughen the pressing surface 6a of the mesh holding portion 6 made of an elastic material in order to obtain an anti-slip effect.

Further, since the mesh holding portion 6 is expected to be elastically deformed during its operation, when the mold is clamped without inserting the mesh 52 into the cavity 5, the pair of mesh holding portions 6 are pressed by the pressing surfaces 6a. It is possible to set the height dimension of the mesh holding portion 6 to be relatively high so as to contact or interfere with each other. Therefore, when the height of the mesh pressing portion 6 is set to be high as described above, the amount of elastic deformation of the mesh pressing portion 6 in a state where the mesh 52 is sandwiched therebetween increases, so that the mesh 52 can be strongly pressed. effective.

[0022]

The present invention has the following effects.

That is, in the method for manufacturing a filter gasket according to the first aspect of the present invention having the above structure, the mesh holding portion of the mold is formed of an elastic material such as resin or rubber, and the mesh holding material made of the elastic material is formed. Because the gasket body is formed while the mesh is elastically pressed by the part, the mesh is elastically deformed according to the magnitude of the pressing force when the mesh holding part made of elastic material presses the mesh. Adhere to the mesh along the stitch. Therefore, since the mesh holding portion made of the elastic material closes the gap formed by the mesh of the mesh by the elastic deformation, the rubber material for molding the gasket main body does not enter the gap, thereby preventing the rubber from being generated around the product. be able to. Therefore, the opening area of the mesh can be secured as designed, and a product having no functional problem can be manufactured. In addition, it is possible to prevent the problem of foreign matter mixing due to peeling of the rubber from the mesh accompanying the rubber around.

Further, the present invention having the above-mentioned structure is provided in claim 2 of the present invention.
In the filter gasket manufacturing device according to the above, since the mesh holding portion of the molding die is formed of an elastic material such as resin or rubber, when the mesh holding portion made of an elastic material holds the mesh, the magnitude of the pressing force is reduced. It is elastically deformed and adheres to the mesh along the mesh stitch. Therefore, since the mesh holding portion made of the elastic material closes the gap formed by the mesh of the mesh by the elastic deformation, the rubber material for forming the gasket main body does not enter the gap, thereby preventing the rubber from being generated around the product. be able to. Therefore, the opening area of the mesh can be secured as designed, and a product having no functional problem can be manufactured. Further, it is possible to prevent a problem of foreign matter mixing due to peeling of the rubber from the mesh due to the rubber circumference.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a molding die used for performing a manufacturing method according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG. 1;

FIG. 3 is a sectional view of an essential part showing a mold opening state of the mold.

FIG. 4 is a half sectional view showing an example of a filter gasket.

FIG. 5A is a plan view showing a stitch structure of a mesh,
(B) is a sectional view taken along line AA in FIG.

FIG. 6 is a sectional view of a main part of a molding die according to a conventional example.

FIG. 7 is an enlarged view of a main part of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Upper mold 3 Lower mold 4 Parting part 5 Cavity 6 Mesh holding part 6a Pressing surface 51 Filter gasket 52 Mesh 53 Gasket main body 53A Rubber material 54 Fiber material

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J040 BA07 EA50 FA05 HA01 HA02 HA11 4D019 AA01 AA03 BA02 BA13 BB02 CB01 CB06 CB07 4F202 AA45 AD02 AD05 AD16 AH03 AJ03 AJ05 CA01 CA11 CB01 CB12 CQ03 CQ05

Claims (2)

[Claims] A mesh (52) made of metal fiber or synthetic fiber and a gasket body (5) made of rubber-like elastic material.
3) Filter gasket (51) integrated with
The gasket body (53).
The gasket main body in a state where the mesh (52) is inserted into the cavity (5) of the molding die (1) for molding the mesh (52) and the mesh (52) is pressed by the mesh pressing portion (6) of the molding die (1). In the method for manufacturing a filter gasket according to (53), the mesh pressing portion (6) is formed of an elastic material such as resin or rubber, and the mesh (52) is formed by the elastic material pressing portion (6). Forming the gasket main body (53) while elastically pressing the gasket. 2. An apparatus for manufacturing a filter gasket, wherein a mesh holding portion (6) of a molding die (1) is formed of an elastic material such as resin or rubber to carry out the manufacturing method of claim 1.