JP4340108B2 - Metal gasket member and manufacturing method thereof - Google Patents

Description

The present invention relates to a metal gasket member used as a base material for various gaskets, and particularly to a metal gasket member in which a surface layer made of an elastic body is formed on the surface of a steel plate.

  As a metal gasket member of this type, a metal plate surface disclosed in Patent Document 1 has been coated with a compound layer in which fine particles of fiber material, cork material, rubber material and rubber chemicals are blended. there were.

Further, as a gasket member using cork grains, there is a gasket of cork rubber. These were formed into a gasket by mixing cork grains and a rubber material into a sheet shape and then skiving and punching.
JP-A-8-93920

  In the metal gasket member disclosed in Patent Document 1, since the coating layer is a compound layer formed by mixing fiber material, cork fine particles, rubber material, etc., the compound layer is in a homogeneous mixed state. It was not easy. In order to make it homogeneous, it is necessary to sufficiently knead, and as a result, it is not easy to clearly confirm that the mixture is homogeneously mixed.

  In addition, gaskets using a cork rubber did not perform their functions sufficiently because stress relaxation and settling were large, resulting in bolt torque reduction and leakage.

The manufacturing method according to claim 1 is a method of manufacturing a metal gasket member in which a surface layer made of an elastic body is provided on a surface of a steel plate, an adhesive layer is formed on the surface of the steel plate, and cork grains are formed on the surface of the adhesive layer. In this state, a rubber liquid is applied to the deposited cork grains, and then a surface layer is formed by compression heating using a mold.

The manufacturing method according to claim 2 is the manufacturing method according to claim 1, wherein after the adhesive is applied to the surface of the steel sheet, cork grains are dispersed and uniformly deposited on the surface, and after drying, a rubber liquid is applied to the surface. The surface layer is formed by compressing and heating using a mold after drying.

The manufacturing method of claim 3 is a method of manufacturing a metal gasket member in which a surface layer made of an elastic body is provided on the surface of a steel plate, wherein cork grains are uniformly deposited in a mold having a desired shape, and the cork thus deposited is deposited. Apply the rubber liquid to the grains, dry them, place the steel sheet with the adhesive layer on the surface of the cork grains in advance so that the surface of the adhesive layer is in contact, and compress and heat it using a mold. A surface layer is formed.

According to a fourth aspect of the present invention, there is provided a metal gasket member in which a surface layer made of an elastic body is provided on a surface of a steel plate, and the surface layer is deposited with a cork grain and a rubber liquid deposited with a uniform density and a desired thickness. It is a layer.

  As described above, the present invention provides a method for producing a metal gasket member in which a surface layer made of an elastic body is provided on the surface of a steel sheet, and an adhesive layer is formed on the surface of the steel sheet, and the surface of the adhesive layer is formed. In a state where cork grains are deposited, a rubber liquid is applied to the deposited cork grains, and then a surface layer is formed by compression heating using a mold.

  In this way, only the cork grains are pre-deposited on the entire steel sheet coated with the adhesive, and the cork grains are bound with the rubber liquid in a uniformly leveled state, so that the surface layer is surely deposited by uniform deposition of the cork grains. Can be formed easily.

  If the cork grains are deposited by pre-spreading evenly over the entire surface of the steel sheet, the subsequent leveling operation can be reduced and manufactured.

  Further, when cork grains are deposited in the mold as in claim 3, the surface layer by the deposition of the cork grains can be easily manufactured in a desired density distribution with a uniform density. it can.

Therefore, in the metal gasket member manufactured by the manufacturing method as shown in claims 1 to 3, the surface layer to be an elastic seal coating is formed of cork grains having a uniform density and a desired thickness as in claim 4. Since it becomes a deposited layer with the rubber liquid, it becomes a metal gasket member with good sealing performance and excellent anti-vibration effect. Furthermore, since the elastic seal coating as the surface layer is composed of cork grains and a rubber liquid, the amount of settling is reduced compared to the cork rubber.
Moreover, if it forms in the desired thickness distribution shape which provided the bead in the surface layer used as an elastic sealing film, a thing with a further better sealing performance can be provided as a metal gasket member.

  The purpose of providing a metal gasket member having a surface layer of cork grains and rubber liquid deposited at a uniform density on the surface of a steel sheet can be easily realized by using an existing manufacturing technique.

  FIG. 1 shows a cross-sectional view of a metal gasket member according to the present invention, and FIGS.

  FIG. 1 shows a metal gasket member used for various gaskets, and a surface layer (elastic seal coating) 5 which is a uniform deposited layer of cork grains 3 bound by a rubber liquid 4 to the surface of a steel plate 1 as a core material. Formed. As the steel plate 1, various types such as SPCC (cold rolled steel plate), SPHC (hot rolled mild steel plate), aluminum plate, stainless steel plate, etc. can be used. What was pulverized to a particle size of about 2 mm is used. As the rubber liquid 4, a synthetic rubber such as NBR, ACM, AEM, FKM, VMQ, or a synthetic resin solvent type or latex type is used.

Next, the manufacturing method will be described with reference to FIGS.
First, as shown in FIG. 2, the adhesive 2 is applied to the surface of the steel plate 1 serving as a core material. The cork grains 3 are dispersed and deposited on the entire upper surface (FIG. 3). In this state, as shown in FIG. 3, since there is a variation in the accumulated state, next, the deposited cork grains 3 are leveled so as to have a constant thickness, and the adhesive 3 is dried (FIG. 4). . Thereafter, the rubber liquid 4 is applied to the entire surface from the upper surface of the deposited cork grains 3, and the cork grains 3 are impregnated with the rubber liquid 4 and dried (FIG. 5). Finally, the gasket member in this state is set in the lower mold 7 and is compressed and heated together with the upper mold 6 to provide a surface layer (elastic seal coating) 5 made of cork grains 3 on the surface of the steel plate 1. A metal gasket member is formed (FIG. 6). The metal gasket member thus produced is finished into a gasket having a desired shape by punching or the like according to the intended use and shape.

  In the manufacturing method described above, after the rubber liquid 4 is applied, the cork particles 3 are again sprayed on the upper surface, and the process from deposition to application of the rubber liquid 4 (corresponding to the processes of FIGS. 3 to 5) is performed and then dried. If a method of carrying out the compression heat treatment with the molds 6 and 7 is performed, it is possible to manufacture a metal gasket member having a coating on an elastic seal made of cork grains 3 having a further thickness.

  Moreover, the steel plate 1 which is a core material of this metal gasket member is applicable also to what was previously stamped and formed into a desired shape.

FIG. 7 is a cross-sectional view of a metal gasket member according to another embodiment, and FIGS.
This metal gasket member has a surface layer (elastic seal coating) 5 that is a deposited layer of cork grains 3 bound by a rubber liquid 4 on the surface of a steel plate 1 that is a core material, and the deposited layer of cork grains 3 is uniform. The beads 8 are formed in a desired thickness distribution in terms of density.

The manufacturing method is as follows. In the case of the present embodiment, the main one is to use the steel plate 1 punched and formed in a desired shape in advance, but it is also applicable to a flat one.
First, as shown in FIG. 8, a lower mold 7 corresponding to the shape and thickness distribution of the deposited layer of the cork grains 3 to be formed is prepared, and the cork grains 3 are deposited in the lower mold 7. Next, the cork grains 3 in the lower mold 7 are leveled (FIG. 9). The rubber liquid 4 is applied from the upper surface, impregnated in the cork grains 3, retained, and dried (FIG. 10). After drying, the steel plate 1 that has been previously coated with the adhesive 2 and dried is placed in such a direction that the coated surface of the adhesive is in contact with the deposited layer surface of the cork grains 3 (FIG. 11). Finally, the lower mold 7 and the upper mold 6 are combined and subjected to compression heat treatment to produce a metal gasket member shown in FIG. 8 (FIG. 12).

  When using a steel plate 1 that has been punched into a desired shape in advance, the final gasket shape is obtained in this state. However, when a flat steel plate 1 is used, a metal gasket member in this state is further provided. Punching into the final gasket shape.

  Further, a metal gasket member in which the surface layer 5 that is a deposited layer of the cork grains 3 is formed on both surfaces of the steel plate 1 that is a core material by using the methods shown so far or in combination is also possible.

By using the metal gasket member manufactured as described above to form a desired gasket shape, it can be applied to applications that require a sealing effect and a vibration-proofing effect.

Sectional drawing which shows embodiment example of the metal gasket member by this invention It is sectional drawing which shows the embodiment of the metal gasket member manufacturing method by this invention, and shows an adhesive agent coating process. It is sectional drawing which shows the embodiment of the metal gasket member manufacturing method by this invention, and shows the dispersion | distribution and deposition process of a cork grain. It is sectional drawing which shows the embodiment of the metal gasket member manufacturing method by this invention, and shows the equalization process of the deposited cork grain. It is sectional drawing which shows the embodiment example of the metal gasket member manufacturing method by this invention, and shows the application | coating process of a rubber liquid. It is sectional drawing which shows the embodiment of the metal gasket member manufacturing method by this invention, and shows the compression heating process by a metal mold | die. Sectional drawing which shows another embodiment of the metal gasket member by this invention It is sectional drawing which shows another embodiment of the metal gasket member manufacturing method by this invention, and shows the cork grain deposition process in a metal mold | die. It is sectional drawing which shows another embodiment of the metal gasket member manufacturing method by this invention, and shows the equalization process of the deposited cork grain. It is sectional drawing which shows another example of embodiment of the metal gasket member manufacturing method by this invention, and shows the application | coating process of a rubber liquid. It is sectional drawing which shows another example of embodiment of the metal gasket member manufacturing method by this invention, and shows the mounting process of a steel plate. It is sectional drawing which shows another embodiment of the metal gasket member manufacturing method by this invention, and shows the compression heating process by a metal mold | die.

Explanation of symbols

1 Steel plate 2 Adhesive
3 Cork grain 4 Rubber liquid 5 Surface layer 6 Upper mold 7 Lower mold 8 Bead

Claims (4)

In the manufacturing method of the metal gasket member provided with a surface layer made of an elastic body on the surface of the steel plate,
In the state where an adhesive layer is formed on the surface of the steel plate and cork grains are deposited on the surface of the adhesive layer, a rubber liquid is applied to the deposited cork grains, and then compression heating is performed using a mold. A metal gasket member manufacturing method for forming a surface layer. In the manufacturing method of the metal gasket member in Claim 1,
After the adhesive is applied to the surface of the steel plate, cork grains are spread and uniformly deposited on the surface, and after drying, a rubber liquid is applied to the surface, and after drying, compression heating is performed using a mold to form a surface layer. A method for manufacturing a metal gasket member. In the manufacturing method of the metal gasket member provided with a surface layer made of an elastic body on the surface of the steel plate,
A steel plate in which cork grains are uniformly deposited in a mold having a desired shape, a rubber liquid is applied to the deposited cork grains, dried, and an adhesive layer is previously formed on the surface of the cork grains. A method for producing a metal gasket member, wherein the surface of the adhesive layer is disposed so as to be in contact with each other, and the surface layer is formed by compression heating using a mold. In the metal gasket member provided with a surface layer made of an elastic body on the surface of the steel plate,
A metal gasket member, wherein the surface layer is a deposited layer of cork grains and rubber liquid deposited at a uniform density and a desired thickness.

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