JPH07132497A - Female plate structure in punching machine - Google Patents

Abstract

PURPOSE:To punch the residue of sheet material positively regardless of the shape and size by additionally providing an elastic piece protruding inward of the hole of a female mold so as to be positioned inside of the contour of the residue in the case of piercing a punching pin through the hole of the female mold to punch the residue interposed in between. CONSTITUTION:The upper part of a punching pin 1 is fixed to a veneer board 5, and sponge 7 is fixed to the veneer board 5 around the punching pin 1. A female plate 3 is formed by laminating a lower plate 11, an elastic plate 13 and an upper plate 15, and these plates are pierced with a hole 17. In sheet material 51, a residue 53 is partitioned by a cutting line 55, and the residue 53 is punched by the punching pin 1 at the time of piercing through the hole 17. In this case, the hole 17 is formed to be larger than the residue 53. On the other hand, the elastic plate 13 is provided with an elastic piece 21 protruding inward of the hole 17 so as to be positioned inside the contour of the residue 53. The whole residue 53 is thereby pushed down by the punching pin 1 and the elastic piece 21, and the residue 53 can be positively punched regardless of the shape and size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female plate structure in a punching machine, and more specifically, a punching used for forming a notch having a desired shape on a synthetic resin film or a sheet material such as thin paper or cardboard. Regarding a female plate structure in a machine.

[0002]

2. Description of the Related Art When a cutout having a desired shape is formed on a sheet material such as a synthetic resin film, thin paper, or thick paper, a cut line is first formed on the sheet material along the contour of the cutout to be formed. . The cut line is formed, for example, by placing a sheet material on the lower die of the press machine, attaching a cutting blade to the upper die of the press machine, and lowering the cutting blade together with the upper die and press-contacting the sheet material. . When the cutting line is formed by the cutting blade, if the scraps surrounded by the cutting line fall off on the lower mold, the cutting line cannot be continuously formed. Therefore, as shown in FIG. Material 5
The cut lines 55 are not continuously formed on the periphery of the scrap 53 on the first portion, and a plurality of portions called the joints 57 where the cut lines 55 are not formed are left. The scrap 53 defined by the cut line 55 and the connection 57 is the cut line 5
In a stripping process different from the process of 5, the sheet material 51 is pulled out.

In this stripping step, as shown in the sectional front view of FIG. 17 and the schematic plan view of FIG. 18, a hole 59 having a shape slightly larger than the scrap 53 is formed on the lower die of the press.
A female plate 61 made of a veneer plate on which a sheet is formed is set, and the dregs 53 and the hole 59 are aligned on the female plate 61 to form the sheet material 5
Put 1 Then, the punching pin 63 and the sponge 65 are attached to the upper die side of the press machine, and the punching pin 63 and the sponge 65 are lowered by lowering the upper die. First, the sheet material 51 is pressed by the sponge 65, and then,
As the punching pin 63 descends, the scrap 53 is pressed downward by the punching pin 63 to break the joint 57,
The dregs 53 are dropped from the hole 59.

[0004]

However, in such a method, if the arrangement and size of the joints 57 are varied, even if the scrap 53 is pressed by the punching pin 63, all the joints 57 may be removed in some cases. There is a problem that only the punching pin 63 penetrates the sheet material 51 without being broken, and the dregs 53 hangs down from the sheet material 51 via the joint 57, so that the dregs 53 cannot be reliably pulled out. Therefore, as shown in the stripping process diagrams in FIGS. 19 and 20,
When lowering the punching pin 63, raise the lower pin 67,
A method is also proposed in which the punching pin 63 and the lower pin 67 are lowered while the scrap 53 is sandwiched between the punching pin 63 and the lower pin 67. However, in this method, since a mechanism for moving the lower pin 67 up and down coaxially with the punching pin 63 is required, the structure becomes complicated and it takes time to assemble, and the lower pin 67 must be raised. There is a problem that it takes minutes and work efficiency is poor.

Further, as shown in a schematic plan view of FIG. 21 and stripping process diagrams of FIGS. 22 to 25, a plurality of pressing plates 69 having a predetermined length are provided in place of the punching pins 63, and a female plate is further provided. The shape of the hole 59 of 61 is such that the upper end is a scrap 53.
It has a smaller shape and a tapered shape that becomes larger as it goes downward, and the scrap 53 is formed by the pressing plate 69.
There is also proposed a method in which the scrap 53 is curved and deformed when the sheet is pressed downward and the scrap 53 is pulled out from the sheet material 51 by utilizing the reaction force thereof. However, even in this method, if there are variations in the arrangement and size of the joint 57, there is still a problem that the scrap 53 cannot be surely pulled out, and there is a problem that it takes time to process the pressing plate 69 and the hole 59. Further, in this method, depending on the size of the residue 53, such as when the residue 53 is a small diameter circle, or depending on the shape of the residue 53, the pressing plate 69 cannot be used and the residue 53 cannot be extracted. Further, since the hole 59 is tapered, the female plate 61 is provided when the residue 53 is provided in the vicinity.
There is a problem that the hole 59 cannot be formed in the hole.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to remove the residue from a sheet material regardless of the size of the residue or the shape of the residue. (EN) It is to provide a female plate structure of a punching machine that can be reliably pulled out.

[0007]

In order to achieve the above object, the present invention provides a sheet material having shavings defined by cutting lines and ties, wherein the shavings are provided on the female plate in which the holes are formed. In a punching machine which is placed together and has a punching pin penetrating from the scrap portion into the hole to pull out the scrap from the sheet material, the hole of the female plate is formed in a shape larger than the scrap, and the inner circumference of the hole is formed. An elastic piece that protrudes inward in the radial direction of the hole and is located inside the outline of the residue is provided at a portion located below the upper surface of the female plate by a predetermined dimension.

According to the present invention, the female plate comprises a lower plate, an elastic plate arranged on the lower plate, and an upper plate arranged on the elastic plate. Is formed of the elastic plate.

[0009]

With the lowering of the punching pin, the residue is pinched by the punching pin and the elastic piece, and the entire residue is pressed downward from the sheet material, whereby the plurality of joints are surely broken. When the punching pin is further lowered, the residue moves downward while bending the elastic piece downward, and at this time, the residue also bends downward due to the resistance of the elastic piece, and the residue becomes lower than the elastic piece. Where it was pushed,
The elastic piece returns to its original state due to its elasticity, and the debris bounces downward due to the curved and deformed reaction force and is reliably dropped from the hole.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional front view of an essential part of the punching machine according to the first embodiment, and FIG. 2 is a bottom view of the essential part. 1 is a punching pin, 3 is a female plate, the punching pin 1 is attached to the upper die side of the press machine, and the female plate 3 is attached to the lower die side of the press machine, for example. The punching pin 1 has an upper portion fixed to the veneer plate 5, and a sponge 7 is fixed to the veneer plate portion around the punching pin 1, and the punching pin 1 is formed in a round bar shape as in the conventional case. The veneer plate 5 to which the punching pin 1 and the sponge 7 are fixed is attached to the upper die of the press.

The female plate 3 includes a lower plate 11 and the lower plate 11
The elastic plate 13 arranged on the elastic plate 13 and the upper plate 15 arranged on the elastic plate 13. The lower plate 11
Is formed of a veneer plate, and the lower plate 11 has a hole 17 having a shape slightly larger than the scrap 53. In the embodiment, a veneer plate having a thickness of about 6.0 to 9.0 mm is used as the lower plate 11, and the hole 17 has a thickness of 1.5 from the contour of the residue 53.
It is formed by laser cutting with a large contour of about mm.

The elastic plate 13 is formed of an elastic member such as synthetic resin or natural rubber. The elastic plate 13 has a hole 19 having a contour larger than the contour of the scrap 53 by about 1.0 mm, and an elastic piece 2 protruding radially inward from the inner peripheral portion of the hole 19 and located inside the contour of the scrap 53.
1 are formed, and four elastic pieces 21 are provided at equal intervals in the circumferential direction of the hole 19, and each elastic piece 21 has a predetermined length in the circumferential direction. In the embodiment, a rubber plate having a thickness of about 1.5 mm is used as the elastic plate 13, and the elastic plate 13 is projected radially inward by about 2 mm from the inner peripheral surface of the hole 19.

The upper plate 15 is made of synthetic resin,
The upper plate 15 has a hole 23 that is slightly larger than the scrap 53.
Are formed. In the embodiment, the target sheet material 5
Since the thickness of 1 is about 0.3 to 2.0 mm, a vinyl chloride plate having a thickness of about 1.5 mm is used as the upper plate 15, and the hole 23 has the same shape as the hole 19 and is formed by laser cutting. Has been done. A veneer plate may be used as the upper plate 15, and the upper plate 15 and the lower plate 11 may be members other than the veneer plate and the synthetic resin plate as long as they can be easily processed.

The lower plate 11, the elastic plate 13, and the upper plate 15 are overlapped with the centers of the holes 17, 19, 23 aligned with each other and fixed by screws 25, whereby the female plate 3 is constituted and the female plate is formed. 3 is a punching pin 1 and holes 17, 19, 23
It is attached to the lower mold of the press with the center of the press aligned.

Next, the operation will be described. As shown in FIG. 3, the sheet material 51 is placed on the female plate 3 with the dregs 53 aligned with the holes 17, 19, and 23. Next, as shown in FIG. 4, the upper mold is lowered. As a result, the punching pin 1 and the sponge 7 are lowered, and the sponge 7 is first moved to the sheet material 51.
And the sponge 7 is compressed to contact the sheet material 51.
Are pressed onto the female plate 3.

By further lowering the upper die, the punching pin 1
5 hits the center of the scrap 53, and as shown in FIG. 5, the scrap 53 is pushed downward as the punching pin 1 is lowered, and the joint 57 is broken. Then, as the punching pin 1 is further lowered, as shown in FIG.
Are reliably broken, and the residue 53 is extracted from the sheet material 51. This is because, as the punching pin 1 descends, the scrap 53 is once sandwiched between the punching pin 1 and the elastic piece 21 on the elastic piece 21, and the whole scrap 53 is pressed downward from the sheet material 51. Therefore, it is considered that the plurality of joints 57 are all reliably broken.

As the upper die is further lowered, the scrap 53 is pushed downward by the punching pin 1 as shown in FIG. 7, and the scrap 53 moves downward while bending the elastic piece 21 downward. The scrap 53 is also curved downward by the resistance of the elastic piece 21. Then, when the scrap 53 is pushed below the elastic piece 21, the elastic piece 21 returns to its original state due to its elasticity as shown in FIG.
By the reaction force that has been curved and deformed, it bounces down and is reliably dropped from the hole.

As described above, according to this embodiment, since the elastic piece 21 is provided in the hole of the female plate 3 at a portion located below the upper surface of the female plate 3 by a predetermined dimension, the punching pin 1 is lowered. At this time, the punching pin 1 and the elastic piece 21 cause the entire scrap 53 to be pressed downward from the sheet material 51, and all the joints 57 are reliably broken. Therefore, the connection 57
Even if there are variations in the arrangement and size of the
It is possible to reliably pull out the residue 53 regardless of the size and shape of the.

Further, as in the embodiment, if the elastic plate 13 on which the elastic piece 21 is formed is sandwiched by the lower plate 11 and the upper plate 15 to form the female plate 3, the elastic piece 21 can be easily provided. Therefore, the female plate 3 can be obtained at low cost.

Next, another embodiment will be described with reference to FIGS. The female plate 3 shown in the sectional front view in FIG. 9 and in the bottom view in FIG. 10 is different from the first embodiment in the shape of the elastic piece 221. In this embodiment, the elastic piece 221 is provided with the hole 23.
The slit 223 inside the
It is divided into four by. In the female plate 3 shown in the sectional front view in FIG. 11 and in the bottom view in FIG. 12, the scrap 53 has a rectangular shape.
The shapes of 7, 19, and 23 are also formed in a rectangular shape, and the elastic piece 321 is formed to project at a location corresponding to the long side of the rectangle. In addition, in the female plate 3 shown in the bottom view of FIG. 13, the scrap 53 has a triangular shape, and elastic pieces 421 are projectingly formed at locations corresponding to respective sides of the triangle. The female plate 3 shown in the sectional front view of FIG. 14 and the bottom view of FIG. 15 has a slender rectangular shape of the scrap 53. In this embodiment, the female plate 3 is shorter than the elastic piece 521 provided on the long side. Elastic piece 522 provided on the side
Of the elastic piece 522 when the scrap 53 is pulled out by increasing the width of the
Thus, the central portion of the scrap 53 in the longitudinal direction is convex downward and curved.

[0021]

As is apparent from the above description, the present invention is
A sheet material having scraps defined by cutting lines and ties is placed on a female plate in which holes are formed so that the scraps are aligned with the holes, and a punching pin is passed through the holes from the scrap portions to form the punch. In a punching machine for extracting scraps from a sheet material, the hole of the female plate is formed in a shape larger than the scrap, and the inner peripheral part of the hole is located at a position below the upper surface of the female plate by a predetermined dimension. Since the elastic piece that protrudes inward in the radial direction and is located inside the outline of the residue is provided, the residue can be reliably removed from the sheet material regardless of the size and shape of the residue, even if there is variation in the connection. It can be pulled out.

[Brief description of drawings]

FIG. 1 is a sectional front view of a main part of a punching machine according to a first embodiment.

FIG. 2 is a bottom view of a main part of the punching machine according to the first embodiment.

FIG. 3 is an explanatory diagram of a stripping process according to an example.

FIG. 4 is an explanatory diagram of a stripping process according to an example.

FIG. 5 is an explanatory diagram of a stripping process according to an example.

FIG. 6 is an explanatory diagram of a stripping process according to an example.

FIG. 7 is an explanatory diagram of a stripping process according to an example.

FIG. 8 is an explanatory diagram of a stripping process according to the example.

FIG. 9 is a sectional front view of a main part of a punching machine according to a second embodiment.

FIG. 10 is a bottom view of the main part of the punching machine according to the second embodiment.

FIG. 11 is a sectional front view of a main part of a punching machine according to a third embodiment.

FIG. 12 is a bottom view of the main part of the punching machine according to the third embodiment.

FIG. 13 is a bottom view of an essential part of the punching machine according to the fourth embodiment.

FIG. 14 is a sectional front view of a main part of a punching machine according to a fifth embodiment.

FIG. 15 is a bottom view of essential parts of the punching machine according to the fifth embodiment.

FIG. 16 is an explanatory diagram of scraps provided on the sheet material.

FIG. 17 is a sectional front view of a conventional punching machine.

FIG. 18 is a schematic plan view of a punching machine according to a conventional method.

FIG. 19 is an explanatory diagram of a stripping process according to a conventional method.

FIG. 20 is an explanatory diagram of a stripping process according to a conventional method.

FIG. 21 is a schematic plan view of a punching machine according to a conventional method.

FIG. 22 is an explanatory diagram of a stripping process according to a conventional method.

FIG. 23 is an explanatory diagram of a stripping process according to a conventional method.

FIG. 24 is an explanatory diagram of a stripping process according to a conventional method.

FIG. 25 is an explanatory diagram of a stripping process according to a conventional method.

[Explanation of symbols]

1 punching pin 3 female plate 7 sponge 11 lower plate 13 elastic plate 15 upper plate 17,19,23 holes 21,221,321,421,521,522 elastic piece 51 sheet material 53 scrap 55 cut line 57 connecting

Claims (2)

[Claims] 1. A sheet material having debris defined by cut lines and ties is placed on a female plate in which holes are formed by aligning the debris with the holes, and punching pins are punched from the debris portion. In a punching machine for penetrating the scraps to extract the scraps from the sheet material, the hole of the female plate is formed in a shape larger than the scraps, and the inner peripheral portion of the hole is located below the upper surface of the female plate by a predetermined dimension. A female plate structure in a punching machine, characterized in that an elastic piece projecting inward in the radial direction of the hole and located inside the outline of the residue is provided at a location. 2. The female plate includes a lower plate, an elastic plate disposed on the lower plate, and an upper plate disposed on the elastic plate, and the elastic piece is the elastic plate. The female plate structure in the punching machine according to claim 1, which is formed by