JP2964409B2 - Gasket manufacturing method - Google Patents

Description

The present invention relates to a method of manufacturing a gasket according to a sealing technique.

[Conventional technology]

Conventionally, as one type of gasket, as shown in FIGS. 5 and 6, a metal plate 1 having a flow passage hole 2 and a plurality of mounting holes 3 is provided. 2
It is known that a rubber packing 4 is bonded to the peripheral portion by vulcanization.

Many gaskets of this type are manufactured together from the viewpoint of improving productivity, that is, an adhesive is simultaneously applied to a plurality of press-formed plates 1 and then a packing 4 is bonded to each plate 1. When applying the adhesive to the plates 1, a large application container containing the adhesive is prepared, a plurality of plates 1 are simultaneously placed in this container, and each plate 1 is entirely immersed in the adhesive. 6, it can be seen that the packing 4 is adhered only to the inner wall of the hole of the plate 1. However, in actuality, the rubber may wrap around both end surfaces of the plate 1 depending on the flatness of the plate 1. In order to cope with this case, it is necessary to apply an adhesive also to the end face of the plate 1. Also, when an adhesive is applied to the plate 1, a rust-preventing effect can be obtained.
Therefore, it is necessary to apply an adhesive to the end face of the plate 1.

[Problems to be solved by the invention]

The following problems are pointed out with respect to the above conventional manufacturing method.

That is, when a plurality of plates 1 are put together in an application container, two or three or more plates 1 may be put in a state of completely overlapping and in close contact with each other.
There is a possibility that a defective product may be generated because the required amount of adhesive is not applied to the contact end surface of the plate 1.

[Means for solving the problem]

In view of the above, the present invention has been made for the purpose of solving the problems found in the above-described conventional technology, and in order to achieve this object, as described in claim 1, an adhesive is simultaneously applied to a plurality of plates. There is a method of manufacturing a gasket for attaching a gasket to each plate, and a step of providing an anti-overlap projection on each plate in advance so that the plates do not overlap each other when the adhesive is applied to the plate; As a state in which the two do not overlap, a step of applying an adhesive to each plate and a step of crushing the protrusion after the adhesive is attached are provided. Further, as described in claim 2, in the above-described claim 1, the protrusion is crushed by a molding pressure or a mold clamping pressure during vulcanization molding of the packing.

(Operation)

In the above-mentioned prior art, when applying the adhesive,
The reason for this is that each plate 1 was formed from the beginning into a complete flat plate, which is the final product shape. On the other hand, in the present invention, a projection is provided on the plate to temporarily protrude in the thickness direction to prevent the plates from overlapping. Further, in the case where the rubber packing is vulcanized and bonded in a subsequent step, the processing can be simplified by crushing the projections by the molding pressure or the mold clamping pressure during vulcanization.

〔Example〕

 Next, embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, at the stage of press-forming the metal plate 1, the plate 1 is provided with at least two projections 5, 6 projecting in the thickness direction of the plate 1.
Each of the plates 1 is provided opposite to each other so as to prevent the plates 1 from overlapping as shown in FIG.
Then, a necessary and sufficient adhesive is applied, and then the packing 4 is adhered to each plate 1. When the packing 4 is made of rubber and is bonded to the plate 1 at the same time as vulcanization molding, pressing members 7a, 7b, 8a, 8b having sufficient hardness are formed in the molding die as shown in FIG. The protrusions 5 and 6 are crushed by the mold clamping force at the same time when the mold is clamped.

〔The invention's effect〕

As described above, according to the present invention, it is possible to prevent the plates from overlapping, apply a sufficient adhesive to each plate, realize uniform application of the adhesive, and prevent the occurrence of defective products. In addition, since the projections are crushed after the application of the adhesive, a product substantially the same as the conventional product can be obtained. Further, if the molding pressure or the mold clamping pressure during vulcanization is used for crushing the projection, there is no need to take any special method, and the processing can be easily performed.

[Brief description of the drawings]

1 to 4 are process explanatory views showing an embodiment of the present invention. FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 5 is a front view of a gasket, and FIG. It is BB sectional drawing in a figure. 1 plate, 2 channel holes, 3 mounting holes 4 packing, 5, 6 protrusion 7a, 7b, 8a, 8b pressing member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16J 15/00-15/14 F16B 3/00-3/06 F16B 4/00 B21D 39/00-39 / 20 H02K 15/02

Claims (2)

(57) [Claims] 1. A method of manufacturing a gasket, wherein an adhesive is simultaneously applied to a plurality of plates (1) and a packing (4) is bonded to each plate (1), wherein the adhesive is applied to the plate (1). Plate (1)
A step of providing in advance the anti-overlap projections (5) and (6) on each plate (1) so that the plates (1) do not overlap each other; A method for manufacturing a gasket, comprising: a step of applying an adhesive to (1); and a step of crushing the protrusions (5) and (6) after the adhesive is attached. 2. The gasket manufacturing method according to claim 1, wherein the projections (5) and (6) are crushed by a molding pressure or a mold clamping pressure during vulcanization molding of the packing (4). .