JPH08243996A - Punching device having punching chip discharging device and its punching method - Google Patents

Abstract

PURPOSE: To completely separate punching chips and a punched product from each other. CONSTITUTION: A punching device is composed of a punching die 26 where the edge tip 24 of a cylindrical punching edge 22 is projected to a surface and is fixed by penetrating from a back face and an elastic plate 28 is stuck to the surface, a stand 32 which supports the punching die from the back face and has a punching chip discharging duct 34 inside and a punching chip discharging device where an intake hole 36 is arranged on one end and an exhaust hole 38 is arranged on the other end and a punching chip discharging hole 40 is arranged so as to communicate with the punching edge lower end fixed to the punching die. When a material on which cardboard 44 is placed is sandwiched and compressed between the punching die and a platen, punching chips are pressed down by the simultaneously punched cardboard, and is pushed in the punching edge, but since the lower end of the punching edge is communicated with the punching chip discharging duct by the punching chip discharging hole, the punching chips drop in the punching chip discharging duct, and when air in the punching chip discharging duct is exhausted from the exhaust hole, the punching chips can be discharged together with the air.

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 punch holes in paper, leather, chemical products, etc., and particularly to a punching device with a punch dust discharging device capable of simultaneously separating and discharging punch dust when punching punch holes. Regarding the punching method.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a punching device for punching a small hole in a paper, leather, chemical product or the like is used to punch a hole in a desired shape on a surface of a punching 26 type mold at a desired position.
A cylindrical punching blade 22 having a cutting edge 24 at the upper end is planted,
Using a punching die 26 having an elastic plate 28 having a thickness such that the cutting edge 24 is hidden around the punching die 26, the material is sandwiched and pressed to punch out the child holes.

However, according to this method, the punching scraps punched out are accumulated in the cylindrical punching blade 22 more and more, resulting not only in a defective punching, but finally in the punching blade 2.
There is an inconvenience that 2 is destroyed. In order to solve this problem, as shown in FIG. 5, a bullet-shaped member 66 urged by the coil spring 64 is attached to the punching blade 22, or as shown in FIG.
An elastic body 68 of rubber or the like is inserted in the inside. for that reason,
At the moment when the material is punched, the member 66 and the elastic body 68 are pushed into the punching blade 22, and after the material is punched,
The punched chips are pushed out toward the product side, and the punched chips are not accumulated in the punching blade 22.

[0004]

However, a bullet-shaped member 66 urged by the coil spring 64 is attached to the punching blade 22 or the punching blade 2 is used.
In the method of inserting the elastic body 68 of rubber or the like into 2, the punching scraps are not completely separated from the punching product, and the punching scraps adhere to the product and remain. Requires an extra step to separate the debris. Also,
Even if the punch scraps accidentally come off the product during punching,
In the next punching process, if this scrap is sandwiched between the materials to be punched, the punching will be incomplete and defective products will occur.

The present invention has been made in order to solve the above-mentioned problems of a punching device for punching a small hole in paper, leather, chemical products, etc., and punches a small hole in paper, leather, chemical products, etc. In this case, it is an object of the present invention to provide a punching device with a punching dust discharging device and a punching method thereof, which completely separates the punching dust and the punched product and does not require an extra step of separating the punching dust in a later step. .

[0006]

The inventor has installed a bullet-shaped member 66 urged by a coil spring 64 in the conventional punching blade 22, or an elastic body 68 such as rubber in the punching blade 22. In the method of inserting, in consideration of the fact that punching dust adheres to the product or remains between the punching dies, which causes extra processes and defective products, conversely consider taking punching dust into the punching blade. It was However, if the punching waste is simply taken into the punching blade, the punching blade will flatten. Therefore, the present invention has been completed on the idea that the punched chips are discharged from the rear end of the punching blade, and the discharged chips are sucked and discharged by the duct.

However, when the device of the present invention is applied to a thin sheet-like material which is elastically deformed and compressed by compression during punching, such as rubber, vinyl sheet, leather, etc., the punching blade is full of punching waste. When it comes to, the punching waste is compressed and pushed into the punching blade when punching, so when the platen rises after punching, the punched dust that is compressed and accumulated in the punching blade bounces and overflows from the punching blade. There was another problem of getting out.

Therefore, as a result of intensive studies on a method of pressing compressed punching waste, when a thick paper is placed on the top and punched together with a thin sheet material to be compressed, the thick paper fits in the uppermost stage. The punching method of the present invention has been completed by newly discovering that compressed punching scraps in the punching punching blade can be pressed well.

According to a first aspect of the present invention, there is provided a punching device with a punching dust discharging device, wherein the punching device has a cylindrical punching blade having a cutting edge having a desired punching shape at its tip, and the cutting edge of the punching blade is projected on the surface of the punching blade. A punching die which is fixed by penetrating the blade from the back surface, and an elastic plate which has substantially the same thickness as the cutting edge of the punching blade protruding from the surface of the punching die and is attached to the surface of the punching die, A table that supports the punching die from the back and has a punching dust discharge duct inside, and has an intake hole at one end and an exhaust hole at the other end and communicates with the lower end of the punching blade fixed to the punching die. It is a gist that it comprises a punching waste discharging device provided with.

Further, the invention of claim 2 of the present invention is, in the invention of claim 1, characterized in that the inner surface of the punching blade is a tapered surface which expands from the cutting edge of the tip toward the inner side. The invention of claim 3 of the present invention is, in the invention of claim 1 or 2, characterized in that an inner blade for dividing the inside of the cutting edge is provided in the cutting edge of the punching blade.

According to a fourth aspect of the present invention, the sheet material punching method punches a small hole having a desired shape by stacking a large number of thin sheet materials which are elastically deformed and compressed by compression during punching. In the method, a punching die for fixing a cylindrical punching blade having a cutting edge of a desired punching shape at the tip by penetrating from the back surface, and the same thickness as the cutting edge of the punching blade protruding from the surface of the punching die. And a small piece having a desired shape by using an elastic plate which is first attached to the surface of the punching die and a punching dust discharging device which supports the punching die from the back surface and discharges the punching dust pushed out from the punching die. When punching holes, a large number of the above materials are placed on the punching die, and a punching scrap pressing plate made of a sheet-like material that does not elastically deform due to compression during punching is placed thereon. And summarized in that punching the punching waste holding plate with the material. According to a fifth aspect of the present invention, in the punching method for the sheet-shaped material, the punching scrap pressing plate is thick paper.

[0012]

Operation: A punching die having a punching dust discharging device attached to a press machine is installed, and the material to be punched is placed on an elastic plate covering the surface of the punching die. Next, the ram is operated to lower the platen, and the material is sandwiched between the punching die and the platen and compressed, and the elastic plate sinks to expose the cutting edge of the punching blade, and a hole having a desired shape is punched in the material. The punching waste is pushed into the punching blade.

The punching scraps pushed into the cylindrical punching blade are pushed by the punching scraps pushed one after another to reach the lower end of the punching blade. Since the lower end of the punching blade communicates with the punching dust discharge duct and the punching dust discharge hole, the punching dust falls into the punching dust discharge duct. Since one end of the punching dust discharge duct communicates with the intake hole and the other end communicates with the exhaust hole, it is possible to discharge the punching dust together with the air by exhausting the air in the punching dust discharge duct from the exhaust hole. .

If the inner surface of the punching blade is a tapered surface that expands downward, the punching waste can be smoothly discharged into the punching waste discharge duct. Further, by providing an inner blade for dividing the inside of the cutting edge of the punching blade, it is possible to divide a large punching scrap, so that the discharging of the punching scrap can be facilitated.

In the invention of the punching method according to the fourth aspect of the present invention, a large number of the materials are stacked and placed on the punching die,
Further, a punching dust pressing plate made of a sheet-shaped material which is not elastically deformed by compression during punching is placed thereon, and in order to punch the punching dust pressing plate together with the sheet-shaped material, the uppermost end of the punching blade is deformed. Since it is sandwiched by the cutting edge in the state where it is not present, it is possible to prevent punching dust compressed thereunder from overflowing the punching blade.
Examples of the sheet-shaped material that does not elastically deform include cardboard,
A wood board, a plastic board, etc. can be used.

In the explanation of the above operation, a punching die having a punching waste discharging device attached to the lower plate of the press machine is installed,
Although the case where the material is placed on it has been explained, conversely, when the punching die with the punching waste discharging device attached to the platen is attached with the cutting edge down and the material is placed on the lower plate of the press machine, the action is completely Is the same.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a press machine equipped with an apparatus according to an embodiment of the present invention. The press machine 10 includes a lower plate 12, columns 14 erected at four corners thereof, an upper plate 16 fixed to the upper ends of the columns 14, a ram 18 mounted downward at the center of the upper plate 16, and a ram 18 The platen 20 is moved up and down by being guided by the column 14.

The punching blade 22 is a cylindrical blade having a cutting edge 24 having a desired punching shape at the upper end, and as shown in the sectional view of FIG. It is a surface and is punched from the back into a through hole formed in the punching die 26 so that the hole can be punched at a predetermined position, and the blade tip 24 projects from the punching die 26 at a predetermined height. .

An elastic plate 28 is attached to the surface of the punching die 26 so as to surround the punching blade 22, and the elastic plate 28 is made of an elastic material such as rubber so that the cutting edge 24 of the punching blade 22 is hidden. Is the thickness of.

The punching dust discharging device 30 is a base 32 for supporting the punching die 26 from below, and a punching dust discharging duct 34 is provided inside, and an intake hole 36 is connected to one end thereof, and the other end thereof. An exhaust hole 38 is connected to. Further, the punching dust discharge duct 34 is provided with punching dust discharge holes 40 which communicate with the lower ends of the punching blades 22 of the punching die 26. The inner surface shape of the punching dust discharge hole 40 is substantially equal to or slightly larger than the inner surface shape of the lower end of each punching blade 22, so that the punching dust accumulated inside the punching blade 22 can be smoothly discharged.

The operation of the apparatus of this embodiment will be described. The punching die 26 having the punching dust discharging device 30 attached to the lower plate 12 of the press 10 is installed, and about 20 sheets of the punching material 4 are stacked on the elastic plate 28 covering the surface of the punching die 26.
Place 2. Further, if necessary, the pressing scraps 44 such as thick paper are provided with a pressing plate 44 such that the punching scraps spring back due to the elasticity of the material and do not overflow from the tip of the punching blade 22.
Place on top of 2.

Then, the ram 18 is actuated to lower the platen 20, and the material 42 is sandwiched between the punching die 26 and the platen 20 via the pressing plate 42 and compressed, as shown in the enlarged partial sectional view of FIG. At the same time, the elastic plate 28 is compressed to expose the cutting edge 24 of the punching blade 22, and a hole having a desired shape is punched in the material 42 together with the pressing plate 42, and at the same time, the punching scraps 46 are pushed by the punched pressing plate 42. It is pushed into the punching blade 22. At this time, the punched pressing plate 42 is sandwiched by the cutting edge 24 in a state where it is not deformed at the uppermost end of the punching blade 22, and the punching dust 46 compressed thereunder overflows the punching blade 22. There is nothing to put out.

The punching scraps 46 pushed into the inside of the cylindrical punching blade 22 are punched scraps 4 pushed one after another.
It is pushed by 6 and reaches the lower end of the punching blade 22. Since the lower end of the punching blade 22 communicates with the punching dust discharge duct 34 through the punching dust discharge hole 40, the punching dust 46 falls into the punching dust discharge duct 34. Punching dust discharge duct 34
Since one end communicates with the intake hole 36 and the other end communicates with the exhaust hole 38, the air in the punch waste discharge duct 34 is exhausted from the exhaust hole 38 by a suction pump (not shown), so that the punch waste 46 together with the air. Is discharged.

If the inner surface of the punching blade is a tapered surface that expands downward, the punching waste can be smoothly discharged into the punching waste discharge duct. Further, as shown in FIG. 3A, by providing an inner blade 60 that divides into two in the cutting edge 24 of the punching blade 22, or an inner blade 62 that divides into three.
Since the large punch scraps can be divided by providing, the discharge of the punch scraps can be facilitated.

In this embodiment, the punching die 26 in which the punching waste discharging device 30 is attached to the lower plate 12 of the pressing machine 10 is used.
The case where the material 42 is placed on the plate is described, but conversely, the punching die 26 having the punching dust discharging device 30 attached to the platen 20 is attached with the cutting edge 24 downward, and the lower plate 12 of the press machine 10 is attached. The operation is exactly the same when the material 46 is placed on.

[0026]

As described above in detail, the punching device with the punching dust discharging device and the punching method thereof according to the present invention have the blade tip of a cylindrical punching blade projected on the surface and penetrated from the back surface to be fixed to the surface. The bottom of the punching blade fixed to the punching die, which is a stand having a punching die to which an elastic plate is adhered, the punching die being supported from the back and having a punching dust discharge duct inside, with an intake hole at one end and an exhaust hole at the other end. And a punching dust discharging device having a punching dust discharging hole communicating with the punching dust discharging hole.When the material is sandwiched between the punching die and the platen via a pressing plate and compressed, the material is punched together with the pressing plate. The plate punching waste is pushed into the punching blade, but even the punching dust of a thin sheet material that is elastically deformed and compressed during punching does not overflow from the punching blade because it is not pressed by the holding plate. Since the lower end of the blade communicates with the punching dust discharge duct and the punching dust discharge hole, the punching dust falls into the punching dust discharge duct, and the air in the punching dust discharge duct is exhausted from the exhaust hole, so that it is punched out with the air. The waste can be discharged. Therefore, the punching waste and the punched product can be completely separated, and an extra step of separating the punching waste in a later step is not required.

[Brief description of drawings]

FIG. 1 is a sectional view of a press machine to which an apparatus according to an embodiment of the present invention is attached.

FIG. 2 is a partial cross-sectional view showing a state where a material is punched out in the embodiment of FIG.

FIG. 3 is a plan view of an embodiment in which a punching blade is provided with an inner blade.

FIG. 4 is a cross-sectional view of a conventional punching blade.

FIG. 5 is a cross-sectional view of a conventional punching blade.

FIG. 6 is a cross-sectional view of a conventional punching blade.

[Explanation of symbols]

 10 ... Press machine 18 ... Ram 20 ... Platen 22 ... Punching blade 24 ... Blade edge 26 ... Punching die 28 ... Elastic plate 30 ... Punching waste discharging device 34 ... -Punch dust discharge duct 36 ... Intake hole 38 ... Exhaust hole 40 ... Punch dust discharge hole 42 ... Material 44 ... Punch dust pressing plate 46 ... Punch dust 60, 62 ... Inner blade

Claims (5)

[Claims] 1. A cylindrical punching blade having a cutting edge of a desired punching shape at its tip, a punching die for projecting the cutting edge of the punching blade to the surface and penetrating and fixing the punching blade from the back surface, An elastic plate having substantially the same thickness as the cutting edge of the punching blade protruding from the surface of the punching die and attached to the surface of the punching die first, and a punching waste discharge duct that supports the punching die from the back surface and is inside. And a punching dust discharging device having a punching dust discharging hole communicating with the lower end of the punching blade fixed to the punching die and having an intake hole at one end and an exhaust hole at the other end. A punching device with a characteristic punching dust discharging device. 2. The punching device with a punching dust discharging device according to claim 1, wherein the inner surface of the punching blade is a tapered surface which expands from the blade tip of the tip toward the inner side. 3. An inner blade for dividing the inside of the cutting edge is provided in the cutting edge of the punching blade.
Alternatively, the punching device with the punching dust discharging device according to claim 2. 4. A method for punching a small hole having a desired shape by stacking a large number of thin sheet-like materials that are elastically deformed and compressed by compression during punching, and has a cutting edge having a desired punching shape at the tip. A punching die that penetrates and fixes a cylindrical punching blade from the back side, and has a thickness approximately the same as the cutting edge of the punching blade protruding from the surface of the punching die, and is first attached to the surface of the punching die. When punching a small hole of a desired shape by using an elastic plate and a punching dust discharging device that supports the punching die from the back surface and discharges the punching dust pushed out from the punching die, a large number of the materials are placed on the punching die. It is possible to stack and place a punching scrap pressing plate made of a sheet-shaped material that does not elastically deform due to compression during punching, and punch the punching scrap pressing plate together with the sheet-shaped material. Punching process of a sheet-like material to symptoms. 5. The punching method for sheet-shaped material according to claim 4, wherein the punching scrap pressing plate is thick paper.