JP2549304Y2 - Rubber coating material punching device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching device for punching a rubber coating material.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a gasket, for example, as shown in FIG. 3, a rubber coating material 11 having a surface of a steel plate 12 coated with rubber 13 is prepared, and the rubber coating material 11 is formed into a predetermined shape. In this punching process, a punching die (not shown) composed of a female die and a male die is used.

[0003]

The above prior art has the following problems. That is, when the prior art punching the rubber coating material 11 by, as shown in FIG. 3, rubber stamping opening peripheral edge of the rubber coating material 11 13
Out of food 14 occurs. In this case, the food 14 is peeled off from the product during use of the actual machine (real vehicle), whereby the sealability may be reduced, or the peeled rubber may obstruct the flow of the fluid (oil). Therefore, conventionally, chamfering is performed to remove the protrusion 14 of the rubber 13 after the punching, and much time and effort are required for manufacturing.

[0004]

SUMMARY OF THE INVENTION In view of the above, the present invention has been devised in order to solve the above-mentioned problems in the prior art. An apparatus for punching a rubber-coated material coated with a punching die comprising a female die and a male die that advances and retreats toward the female die, on the outer periphery of the male die,
To cut the rubber prior to punching with a punching die
Mutson blades are relatively movable via springs
The present invention provides a punching device for a rubber coating material, wherein

[0005]

In the punching device of the present invention having the above configuration,
Is used when punching rubber coating material with a punching die
Prior to this, rubber was cut with a Thomson blade and
Extrusion of rubber on the periphery of the punched part opening
Can be prevented from remaining.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In FIG. 1, reference numeral 11 is the same as in FIG.
FIG. 2 shows a rubber coating material in which rubber 13 is coated on the surface of a steel plate 12. The punching device for punching the rubber coating material 11 includes a female mold 2 and the female mold 2.
A punching die 1 consisting of a male die 3 moving forward and backward,
A Thomson blade 4 for cutting the rubber 13 is provided on the outer peripheral side of the tip of the male mold 3. Reference numeral 5 is a Thomson blade escape prevention guide. The Thomson blade 4 is externally movable relative to the male mold 3 in the vertical direction in the figure, and only the rubber 13 is set by setting the load of the spring 6 mounted between the Thomson blade 4 and the male mold 3. Is to be cut.

When the rubber coating material 11 is punched by the punching device having the above configuration, the rubber coating material 11 is placed on the female die 2 and the male die 3 is directed downward in the figure by pressing means such as hydraulic pressure. The rubber 13 is cut by the Thomson blade 4 and the steel plate 12 is punched by the punching die 1. Therefore, according to this punching device, since the rubber 13 can be reliably cut along the predetermined shape by the Thomson blade 4, a product in which the rubber 13 does not protrude is manufactured as shown in FIG. be able to.

[0009]

[Effects of the Invention] The present invention has the following effects. That is,
Stamping the rubber coated material of the present invention with the above configuration
Equipment, rubber stamping die
Before punching the material, the Thomson blade
Around the opening of the rubber coating material
It is possible to ensure that no rubber
You. Therefore, in a single-step punching,
Steel sheet can be continuously punched after cutting
Chamfering to remove rubber protrusion after punching
No need to do. Therefore, rubber is coated on the surface of the steel plate.
Of punching rubber coated material
The efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a punching device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a rubber coating material punched by the punching device.

FIG. 3 is a cross-sectional view of a rubber coating material punched by a conventional technique.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 punching die 2 female die 3 male die 4 Thomson blade 5 Thomson blade removal prevention guide 6 Spring 11 Rubber coating material 12 Steel plate 13 Rubber 14 Feeding out

Claims (1)

(57) [Scope of request for utility model registration] 1. A device for punching a rubber (13) coated with rubber coating material (11) on the surface of the steel plate (12), a male to advance and retreat toward the female mold (2) and the female (2) Type
And (3) a punching die (1), and the outer periphery of the male die (3) is punched by the punching die (1).
Thomson blade for cutting the rubber (13) prior to punching
Assemble (4) via spring (6) so as to be relatively movable
A punching device for rubber-coated materials, characterized by being combined .