JP2003025287A - Punching blade structure and punching die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punching blade for clearly punching a punched body having a half cut having high positional accuracy and depth accuracy in the thickness direction, and a punching die. SOLUTION: A total cut blade 1 for punching the punched body 3 in the thickness direction and a half cut blade 2 for half cutting 4 the punched body 3 in the thickness direction have a first punching blade structure in which cutter angle θ is 10 to 60 deg. and cutting edge thickness W is 0.001 to 0.1 mm. The total cut blade 1 and the half cut blade 2 have a second punching blade structure in which cutting edge part 8 has a cutting edge angle θ2 of 10 to 60 deg., the cutter angle θ1 is 5 to 50 deg., namely smaller than the cutting edge angle θ2 , the cutting edge thickness W is 0.001 to 0.1 mm, and height L12 of the cutting edge part 8 and height L11 of the total cut blade 1 or the half cut blade 2 satisfy a relation L11 >L12 >L11 /2. The punching die has the punching blade having such a structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching blade structure and a punching die. Regarding punching die.

[0002]

2. Description of the Related Art Conventionally, a punched material such as a synthetic resin film, paper, a metal foil such as an aluminum foil, or a single material or a laminated material made of an inorganic or organic vapor-deposited film has been
It is punched by a punching die and manufactured into a punched body having a predetermined shape. The manufactured punched body is then formed into a box, a container, a packaging bag, or the like, or used as a seal or a lid. In particular, when the punched body is used as a seal or lid material, a half cut is formed in a part of it in the punching process,
Tearability of manufactured seals and lids is improved.

A punched body having a half cut formed in a part thereof has a punching process using a punching die having a full cutting blade for punching the punched body in the thickness direction, and the punched body in the thickness direction. And a punching process using a punching die having a half-cutting blade for half-cutting.

[0004]

However, in the above-mentioned conventional method, since the half-cutting step and the punching step are performed in separate steps, there is a problem in that a positional deviation between the two tends to occur. In particular, when manufacturing the lid material, it is necessary to provide a grip portion to be gripped when opening the lid material, and to form a half cut with high positional accuracy from the bases on both sides of the grip portion to the lid material main body portion. . At this time, if the half-cut positional accuracy is insufficient, there is a problem in that the easy-opening property of the lid material is hindered, quality defects occur, and the yield decreases.

Further, in the case of manufacturing a seal or a lid material, for example, the depth of the half cut must be adjusted according to the application, and the depth of the half cut must be formed with high precision. In this case, if the precision of the depth of half-cut is insufficient, there is a problem that the peeling property of the seal or the lid member or the tearing property such as the easy opening property is hindered. Specifically, if the half cut is formed too deeply, the tear resistance will decrease, and there is the problem that peeling will occur due to weak vibration or impact, and if the half cut is formed too shallow, the tear resistance will be large. However, there is a problem that it cannot be easily torn.

Among these problems, especially the problem of half-cut depth accuracy is caused by the fact that the punching blade is repeatedly used and as a result, the punching blade spills or breaks. Moreover, since such blade spills and blade breaks occur accidentally during manufacturing,
There is a problem that the quality of punched bodies such as manufactured seals and lids suddenly deteriorates.

Further, even in the case of a full cutting blade for punching out a punched object, if the all cutting blade is spilled or broken, there is a problem that the outer circumference of the punched object cannot be punched cleanly.

The present invention has been made to solve the above problems, and its purpose is to:
An object of the present invention is to provide a punching blade structure and a punching die for punching out a punched body having a half cut excellent in positional accuracy and depth accuracy in a thickness direction.

[0009]

A structure of a punching blade according to claim 1 for solving the above-mentioned problems is a full-cutting blade for punching an object to be punched in a thickness direction and an object to be cut in a thickness direction. The structure of a half-cutting blade for half-cutting is characterized in that the full-cutting blade and the half-cutting blade have a blade angle θ of 10 to 60 ° and a cutting edge thickness of 0.001 to 0.1 mm.

According to the structure of the punching blade of the present invention, the spilling of the blade and the breakage of the blade are unlikely to occur at the time of punching the object to be punched and forming the half cut. As a result, even when repeated punching is performed, it is possible to continue punching the outer periphery of the punched object cleanly for all cutting edges, and to continue forming half cuts with good depth accuracy for half cutting edges. be able to. Therefore, according to the structure of the punching blade of the present invention, it is possible to cleanly punch the object to be punched in which the half cut having excellent position accuracy and depth accuracy is formed in the thickness direction, and from the portion where the half cut is formed. It can be torn with a desired tear force.

According to a second aspect of the present invention, there is provided a punching blade having a structure of a full cutting blade for punching a punched object in a thickness direction and a half cutting blade for half-cutting the punched object in a thickness direction.
The full cutting blade and the half cutting blade have a cutting edge portion having a blade tip angle θ ₂ of 10 to 60 °, a blade angle θ ₁ is smaller than the blade tip angle θ ₂ and 5 to 50 °, and a blade edge thickness. Saga is 0.001-0.1 mm, height L ₁₂ of the cutting edge portion, wherein the relationship between the height L ₁₁ of all cutting edges or semi cutting _{edge, L 11> L 12> L} 11/2 It is characterized by being

Also in the structure of the punching blade of the present invention, similarly to the structure of the punching blade according to the above-mentioned claim 1, the spilling of the blade and the breakage of the blade occur during the punching of the object to be punched and the formation of the half cut. It's hard to do. As a result, even when repeated punching is performed, it is possible to continue punching the outer periphery of the punched object cleanly for all cutting edges, and to continue forming half cuts with good depth accuracy for half cutting edges. be able to. Therefore, according to the structure of the punching blade of the present invention, it is possible to cleanly punch the object to be punched in which the half cut having excellent position accuracy and depth accuracy is formed in the thickness direction, and from the portion where the half cut is formed. It can be torn with a desired tear force. In particular, the present invention is characterized in that it has a structure such as a two-step structure having a blade tip portion formed of a predetermined blade tip angle θ ₂ , and further prevents occurrence of blade spillage and blade breakage at the tip portion. Can be prevented.

A punching die according to a third aspect is a punching die provided with a full cutting blade for punching out a punched body in the thickness direction and a half-cutting blade for half-cutting the punched body in the thickness direction. Therefore, the full cutting blade and the half cutting blade have a blade angle θ of 10 to 60 ° and a blade edge thickness of 0.001 to 0.1 mm.
It is characterized by being

According to the present invention, punching and half-cutting can be performed simultaneously with the full-cutting blade and the half-cutting blade provided in the same punching die, so that the half-cut forming position is highly accurate and the half-cutting is performed. It is possible to eliminate the occurrence of quality defects due to the positional deviation of the, and to stabilize the quality and improve the yield. Further, the full cutting blade and the half cutting blade provided in the punching die are less likely to have a spilled edge or a broken edge when punching a half-cut object and forming a half cut. As a result, even when repeatedly punching with a punching die, it is possible to continue punching cleanly on the outer periphery of the object to be punched with all cutting blades, and to perform half cutting with good depth accuracy for half cutting blades. Can continue to form. Therefore, according to the punching die of the present invention, it is possible to cleanly punch the object to be punched, which is formed with a half cut having excellent positional accuracy and depth accuracy, in the thickness direction, and to obtain a desired portion from the portion where the half cut is formed. It can be torn with a tearing force.

A punching die according to a fourth aspect is a punching die provided with a full cutting blade for punching out a punched body in the thickness direction and a half-cutting blade for half-cutting the punched body in the thickness direction. There are 10 to 6 full cutting blades and half cutting blades.
It has a cutting edge portion having a blade tip angle θ ₂ of 0 °, and the blade angle θ ₁ is smaller than the blade tip angle θ ₂ and 5 to 50 °.
In cutting edge thickness is 0.001-0.1 mm, height L ₁₂ of the cutting edge portion, wherein the relationship between the height L ₁₁ of all cutting edges or semi cutting edge, L _11> L _12> characterized in that it is L _11/2.

Also in the present invention, as in the case of the punching die according to the above-mentioned claim 3, punching and half-cutting can be performed simultaneously with a full cutting blade and a half cutting blade provided in the same punching die. Therefore, the accuracy of the half-cut formation position is high, it is possible to prevent the occurrence of quality defects due to the half-cut position deviation, and it is possible to stabilize the quality and improve the yield. Further, the full cutting blade and the half cutting blade provided in the punching die are less likely to have a spilled edge or a broken edge when punching a half-cut object and forming a half cut. As a result, even when repeatedly punching with a punching die, it is possible to continue to punch the outer periphery of the punched object cleanly for all cutting blades, and to perform half cutting with good depth accuracy for half cutting blades. Can continue to form. Therefore, according to the punching die of the present invention, it is possible to cleanly punch the object to be punched, which is formed with a half cut having excellent positional accuracy and depth accuracy, in the thickness direction, and to obtain a desired portion from the portion where the half cut is formed. It can be torn with a tearing force. In particular, the present invention is characterized by including a blade having a structure such as a two-step structure having a blade tip portion having a predetermined blade tip angle θ ₂ , and a blade spill or a blade break at the tip portion. Can be further prevented.

According to a fifth aspect of the present invention, in the punching die according to the third or fourth aspect, the full cutting edge and the half cutting edge are provided at a predetermined interval. .

According to the present invention, the half-cut line can be accurately formed at a position spaced from the outer peripheral line punched by the full cutting blade by a predetermined distance.
In particular, in the case of an object to be punched that has been printed or the like, the accuracy of the formation position of the half cut is improved, which is preferable.

According to a sixth aspect of the present invention, in the punching die according to the third or fourth aspect, the full cutting edge and the half cutting edge are provided continuously in the blade crossing direction. .

According to the present invention, for example, the tearing portion can be formed by punching with a full cutting blade to form a knob portion and half-cutting with a half cutting blade so as to be continuous with the knob portion. By employing the blade having such a configuration, for example, it becomes easy to manufacture a punched body which can easily pull off the half cut portion by grasping the knob portion.

The invention according to claim 7 is the invention according to claims 3 to 6.
In the punching die according to Item _1, the height H _{1 of} all the cutting edges is
And the difference between the half-cutting edge height H ₂ (H ₁ −H ₂ ) is 5
It is characterized in that it is not less than μm and not more than H _1/2 .

According to the present invention, the thickness of the punched body at the portion where the half cut is provided is at least 5 μm or less to reduce the risk of tearing the punched body at the portion and to cut along the half cut line. It is possible to manufacture a punched body that is easily torn.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a punching blade and the punching die of the present invention will be described below with reference to the drawings.

The structure of the punching blade of the present invention includes the structure of the punching blade according to the first embodiment shown in FIG. 1 and the second structure shown in FIG.
The structure of a punching blade according to the embodiment is included, and examples of the punching blade include a full cutting blade 1 and a half cutting blade 2.

(Structure of the punching blade of the first embodiment) The structure of the punching blade of the first embodiment is as shown in FIG.
Has a structure of a full-cutting blade 1 for punching in the thickness direction and a half-cutting blade 2 for half-cutting the body 3 to be cut in the thickness direction. The full-cutting blade 1 and the half-cutting blade 2 have a blade angle θ. Is 10
It is characterized in that the blade edge thickness W is 0.001 to 0.1 mm at -60 °.

According to such a structure of the punching blade, since it is difficult for the blade to be spilled or to break when punching the punched body 3 and forming the half cut 4, even if the punching is repeatedly performed, the whole cutting blade is cut. In the case of 1, the outer peripheral line of the punched body 3 can be continuously punched cleanly, and in the case of the half-cutting blade 2, the depth of the half cut 4 is high.
Can continue to form. As a result, the punched body 3 on which the half cut 4 having excellent depth accuracy and positional accuracy is formed.
Can be punched out neatly in the thickness direction, and can be torn from the portion where the half cut 4 is formed with a desired tearing force. In addition, a suitable blade angle θ ₁ capable of exerting such an effect is 20 to 40 °,
The blade edge thickness W is 0.005 to 0.01 mm.

In this case, the blade angle θ ₁ is 10 °
If the amount is less than the above range, blade spillage or blade breakage is likely to occur, especially at the tip portion, and the blade must be frequently exchanged when punching the punched body 3 and forming the half cut 4, which hinders the manufacturing thereof. On the other hand, if the blade angle θ ₁ exceeds 60 °,
The cut ends are enlarged and the punched body 7 is deformed.

If the thickness W of the cutting edge is less than 0.001 mm, the tip of the blade is too sharp, so that the blade is likely to be spilled or broken, and the punched body 3 and the half cut 4 are used.
The blades often have to be replaced when forming, which hinders their manufacture. On the other hand, when the blade edge thickness W exceeds 0.1 mm, it becomes difficult to cut, and it becomes difficult to form a punch or a half cut of the punched body 3.

[0029] Note that, in this case, the height H ₂ of the height H ₁ and a half cutting edge of all the cutting edge is 1 to 3 mm, that the width D of the base portion of the blade is 0.5~5mm Preferably, by having a height and width in this range, it is possible to make a blade spilling and blade breakage is less likely to occur, as a result,
It is possible to further improve the durability of the blade repeatedly used when forming the punched body 3.

(Structure of punching blade of second embodiment) Second embodiment
The structure of the punching blade is as shown in FIG.
The total cutting blade 1 for punching the
The structure of the half-cutting blade 2 that makes a half-cut 4 in the thickness direction.
The full cutting edge 1 and the half cutting edge 2 are blades of 10 to 60 °
Tip angle θ₂ The blade angle θ₁ 
Is the blade tip angle θ₂ Smaller and 5 to 50 °, edge thickness
The height W is 0.001 to 0.1 mm and the height of the cutting edge portion 8 is high.
L₁₂Is the height L of the full cutting edge 1 or the half cutting edge 2.₁₁With
In a relationship, L₁₁> L ₁₂> L₁₁Characterized by being / 2
Is to have.

The structure of such a punching blade also has the above-mentioned first structure.
As in the case of the punching blade structure of the embodiment, when the punching of the punched body 3 and the formation of the half-cut 4 are unlikely to occur, the spilling of the blade and the breakage of the blade are less likely to occur. In No. 1, the outer periphery of the punched body 3 can be continuously punched cleanly, and in the half-cutting blade 2, the half-cut 4 can be continuously formed with good depth accuracy. As a result, the punched body 3 having the half-cuts 4 having excellent depth accuracy and positional accuracy can be punched cleanly in the thickness direction, and can be torn from a portion having the half-cuts 4 with a desired tearing force. You can In particular, the punching blade according to the second embodiment is characterized in that it has a two-step structure having a blade tip portion 8 having a predetermined blade tip angle θ _2, and it is possible to prevent blade spillage and blade breakage at the tip portion. It is possible to further prevent the occurrence. In addition, a suitable blade angle θ that can exert such effects more
₁ is 15 to 30 ° and the blade edge thickness W is 0.005 to
The blade angle is 0.01 mm, the blade angle θ ₁ is smaller than the blade tip angle θ ₂ and is 20 to 40 °.

In this case, the blade angle θ₁ Is not 5 °
When full, there are blade spills and blade breaks, especially at the tip.
Easy, when punching the punched object 3 and forming the half cut 4
Blades often have to be replaced, which hinders their manufacture.
Occurs. On the other hand, the blade angle θ ₁ Is over 50 °, the blade
Tip angle θ₂ Since it will be a wider angle,
The mouth is expanded and the punched body 7 is deformed.

If the thickness W of the cutting edge is less than 0.001 mm, the tip of the cutting edge is too sharp, so that spilling or breakage of the cutting edge is likely to occur, and the punched body 3 and the half cut 4
The blades often have to be replaced when forming, which hinders their manufacture. On the other hand, when the blade edge thickness W exceeds 0.1 mm, it becomes difficult to cut, and it becomes difficult to form a punch or a half cut of the punched body 3.

When the blade tip angle θ ₂ is less than 10 °,
In particular, blade spillage and blade breakage are likely to occur at the tip portion, and the blade must often be replaced when punching the punched body 3 and forming the half cut 4. On the other hand, when the blade tip angle θ ₂ exceeds 60 °, the tip of the blade has a wide angle, the cut end is enlarged, and the punched body 7 is deformed.

Further, the height L of the cutting edge portion 8₁₂Of the entire blade
Height L₁₁Shorter, overall blade height L ₁₁Half of (L₁₁/
Longer than 2). At this time, the height L of the cutting edge portion 8₁₂Blade
Overall height L₁₁Half of (L₁₁/ 2) In the following cases, the blade
Since the tip portion 8 becomes thin, blade spills and blade breakage easily occur
Become.

[0036] Note that, in this case, the height H ₂ of the height H ₁ and a half cutting edge of all the cutting edge is 1 to 3 mm, that the width D of the base portion of the blade is 0.5~5mm Preferably, by having a height and width in this range, it is possible to make a blade spilling and blade breakage is less likely to occur, as a result,
It is possible to further improve the durability of the blade repeatedly used when forming the punched body 3.

(Punching Die) The punching die according to the present invention has a full cutting blade 1 for punching the object 3 to be punched and the object 3 to be cut.
And a half-cutting blade 2 for half-cutting 4 in the thickness direction. Then, the structure of the punching blade of the first form or the structure of the punching blade of the second form described above is provided.

The half cut 4 does not mean that the entire punched body 3 is cut in the thickness direction, but means a line obtained by cutting a part of the punched body 3 in the thickness direction so as to obtain a desired depth. Is. As for the number of half cuts 4, one may be provided along the line to be torn when the punched body 3 is unsealed, and both sides of the center half cut may be assumed assuming that the tear lines are displaced. You may provide in multiple pieces, such as one each and two each. The punching die of the present invention can optionally be provided with a half-cutting blade 1 capable of forming the half-cut 4 of such an aspect.

In the structure of the punching blade of the first embodiment, as described above, the blade angle θ is 10 to 60 ° and the cutting edge thickness is 0.0.
It is composed of a full cutting edge 1 and a half cutting edge 2 of 01 to 0.1 mm, and the structure of the punching edge of the second embodiment is, as described above, from the blade tip angle θ _{2 of} 10 to 60 °. And the blade angle θ ₁ is the blade tip angle θ.
Less than ₂ and 5 to 50 °, the edge thickness W is 0.00
1 to 0.1 mm, and the height L ₁₂ of the cutting edge portion 8 is L in relation to the height L ₁₁ of the full cutting edge 1 or the half cutting edge 2.
_11> L _12> All the cutting blade is L _11/2 1 and a half cutter 2
It consists of

In the punching die having the punching blades of the first or second mode, punching and half-cutting can be performed simultaneously by the full cutting blade and the half cutting blade provided in the same punching die. Therefore, the accuracy of the formation position of the half cut 4 is high, it is possible to prevent the occurrence of quality defects due to the position shift of the half cut 4, and it is possible to stabilize the quality and improve the yield. Further, since the full cutting blade 1 and the half cutting blade 2 provided in the punching die are less likely to cause spilling or breaking of the blade when the punched body 3 and the half cut are formed, repeated punching with the punching die is possible. Even if it is performed, the outer circumference of the punched body 3 can be continuously punched cleanly in the full cutting blade 1, and the half cut 4 with good depth accuracy in the half cutting blade 2.
Can continue to form. Therefore, according to this punching die, the punched body 3 in which the half cut 4 excellent in the positional accuracy and the depth accuracy is formed can be punched cleanly in the thickness direction, and a desired portion is formed from the portion where the half cut 4 is formed. It can be torn with the tearing force of.

In particular, the punching die having the punching blade according to the second embodiment is provided with the two-stage structure blade having the blade tip portion 8 having the predetermined blade tip angle θ _2, so that the blade spillage at the tip portion A punching die that further prevents the occurrence of blade breakage can be provided.

In the punching die of the present invention, the full cutting edge 1 and the half cutting edge 2 are arranged at a predetermined interval as shown in FIG. 5, or in the blade crossing direction as shown in FIG. It is used by arranging continuously.

In the punching die in which the full cutting edge 1 and the half cutting edge 2 are arranged at a predetermined interval, a half cut line is formed in parallel with the punching line on the outer periphery of the punching body 7 as shown in FIG. Can be formed, half cut 4
Can be formed with high positional accuracy. The interval between the full cutting blade 1 and the half cutting blade 2 may be parallel or non-parallel and may be curved, and is not particularly limited. Therefore, the distance between the full cutting edge 1 and the half cutting edge 2 can be arbitrarily changed, and as a result, the distance between the outer peripheral line of the punched body 7 and the half cut line can be arbitrarily changed.

In the punching die in which the full cutting edge 1 and the half cutting edge 2 are continuously arranged in the blade crossing direction, for example, as shown in FIG. 8, the full cutting edge 1 is punched to form the knob portion 6,
By the half-cutting blade 2 provided so as to be continuous in the blade crossing direction of the full-cutting blade 1, the tear portion 9 half-cut so as to be continuous with the knob 6 can be formed.
By adopting a punching die in which the full cutting blade 1 and the half cutting blade 2 are arranged in this way, the knob portion 6 and the tear portion 9 can be continuously formed. The punched body 7 thus formed is punched along the half-cut 4 by gripping the pick-up portion 6 and pulling it up, starting from the tearing portion 9 that is half-cut continuously to the pick-up portion 6. Body 7
Can be easily torn.

Further, in the punching die in which the full cutting edge 1 and the half cutting edge 2 are continuously arranged in the blade crossing direction, for example, as shown in FIG. , The height H ₃ of the blade is 5 to more than the height H ₂ of the half-cutting blade 2.
It is possible to form the step cutting blade 12 that is 50 μm shorter and has a blade width β of 0.01 to 2 mm. That is, stage cutting blades 12, 5 to 50 [mu] m difference between the height H ₂ of the height H ₃ of the stage cutter 12 and the half cutter 2 preferably 10~40μ
m, and the blade width β of the step cutting blade 12 is 0.01 to
2 mm, preferably 0.1 to 0.5 mm.

The thickness of the punched body 3 in the portion half-cut 4 by the step cutting blade 12 is larger than the thickness of the punched body 3 in the half-cut 4 portion by the half-cutting blade 2.
Therefore, the part half-cut by the step cutting blade 12 is
It becomes harder to tear than the portion half-cut by the half-cutting blade 2, and becomes the tear-starting point 13 of the half-cut 4. As a result, for example, as shown in FIG. 8, in a mode in which the half cut 4 is formed subsequent to the knob portion 6, at the boundary between the knob portion 6 and the half cut 4, the tear starting point 1 is formed.
Since 3 is formed, it is possible to prevent the half cut 4 from being easily torn or torn.

[0047] is less than the difference between the height H ₃ and the height of the half-cutting blades 2 H ₂ stages cutting edge 12 is 5 [mu] m, sometimes half-cut 4 or torn easily torn, as tearing starting point 13 May not be able to exert the effect of. on the other hand,
If the difference exceeds 50 μm, the force (resistance) for tearing the tearing start point 13 increases, and the tearing itself becomes difficult. When the blade width β of the step cutting blade 12 is less than 0.01 mm, the half cut 4 may be easily torn or torn, and the effect as the tear starting point 13 may not be exhibited. On the other hand, if the blade width β of the step cutting blade 12 exceeds 2 mm, the force (resistance) for tearing the tear starting point 13 increases, and the tear itself becomes difficult to tear.

In the punching die of the present invention,
5 and FIG. 6, the height H of the entire cutting edge 1₁ And half
Height H of cutting blade 2₂ Difference with (H₁ -H₂ . Below “α”
Say. ) Is 5 μm or more, H₁ / 2 or less is preferred
Good Height H of all cutting edges 1 ₁ And the height H of the half-cutting blade 2₂ 
By defining the difference α between the
The thickness t of the punched body 3 that has been stamped 4 is at least 5 μm or less.
As above, the risk of tearing the punched object 3 at the relevant part is reduced.
can do. Also, the difference α is H₁ / 2 or less
By doing so, the punched object 3 is cut along the half cut 4.
It can be easily torn. The height of all cutting edges 1
H₁ , Height H of half-cutting blade 2₂ And the difference α is
Within the above range depending on the use, material or layer structure of the body 3
It is set at any time.

[0049] In difference α is less than 5μm the height H ₂ of the height H ₁ of the total cutting edge 1 half cutting edge 2, the half-cut 4 of the hit抜体3 formed by them too deeply formed Therefore, the strength of the punched body 3 is greatly reduced, and the risk of tearing at the half cut 4 due to vibration or shock increases, which is not preferable. On the other hand, the height H ₁ of the full cutting edge ₁ and the half cutting edge 2
If the difference α from the height H ₂ of the cutting edge exceeds H _1/2 , the half cut 4 of the punched body 3 formed by them will not be formed sufficiently deep, so the resistance to tearing will increase and the half cut 4 will be formed. It is not preferable because it is difficult to cut along.

(Punching device) As a punching device,
A flat plate type punching device equipped with the above-described punching die of the present invention or a rotary type punching device can be used. From the viewpoint of quality stabilization and productivity, it is preferable to use a rotary punching device.

Since the full-cutting blade 1 and the half-cutting blade 2 relating to the structure of the punching blade of the present invention are formed in the punching die, the punching of the punched body 3 and the formation of the half cut are the same punching. Depending on the mold, it is done in one step. As a result, there is no positional deviation between the punching line and the half-cut line, and the half-cut can always be provided at a desired position. Therefore, the quality defect due to the positional deviation of the half cut is eliminated, the quality of the punched body 7 can be stabilized, and the yield can be improved.

In the flat plate type punching device, as shown in FIG. 3, an example is shown in FIG.
0 and a face plate 11 having a flat lower surface.
On the surface of the flat plate-shaped die 10 facing the face plate 11, there are a full cutting blade 1 for punching the punched body 3 into individual shapes and a half cutting blade 2 for providing a half cut 4, It is provided by shaving and etching after aligning the positions. The depth of the half cut, that is, the thickness t of the punched body 3 at the half cut portion (see FIG. 7) can be adjusted by the difference in height between the full cutting blade 1 and the half cutting blade 2.

At the time of punching work, a long to-be-punched body 3 such as a roll is conveyed between the flat plate-shaped die 10 and the face plate 11 (from the left side in FIG. 3). Type 1
By the intermittent vertical movement of 0, the flat plate-shaped cutting die 10 operates so that the tips of all the cutting blades 1 provided therein come into contact with the surface of the face plate 11. As a result, the full cutting blade 1 punches the outer periphery of the punched body 3 and the half cutting blade 2 half cuts 4.
Are simultaneously formed. At this time, the punched body 3 is held by the long punched body 3 by means of very small connecting portions provided at several places on the outer periphery, and is then conveyed to the extraction section, where it is extracted. The punched bodies 7 are separated and accumulated by means (not shown) such as pressing with a tool or vacuum suction. Further, the punched waste 5 after the punched body 7 is pulled out is incinerated by winding it up.

As shown in FIG. 4, an example of the rotary type punching device has a punching part composed of an upper roll-shaped punching die 20 and a lower receiving roll 21 having a smooth surface. On the surface of the roll-shaped punching die 20, a full-cutting blade 1 for punching the punched body 3 into individual shapes and a half-cutting blade 2 for providing a half-cut 4 are aligned and machined. It is provided by etching or etching. In this case, the full-cutting blade 1 and the half-cutting blade 2 are both provided along the curved surface of the roll-shaped die 20 at predetermined heights H ₁ and H ₂ , respectively, and the depth of the half-cut 4 is The difference between the heights H ₁ and H ₂ of the full cutting edge 1 and the half cutting edge 2 (H ₁ −
H ₂ = α).

During the punching work, the roll-shaped die 2
0 is fixed so that the tips of all the cutting blades 1 are in contact with the surface of the receiving roll 21, and the long punched body 3 is conveyed between the rotating die 20 and the receiving roll 21. By passing through the gap, the outer periphery of the punched body 3 and the half cut 4 are formed at the same time. After that, as in the case of the flat plate type punching device, the punching device 7 is conveyed to the extracting portion where the individual punching bodies 7 are separated and accumulated.

When the punching body 7 is manufactured by the punching device shown in FIGS. 3 and 4, printing and punching lines and half lines are performed as in the case where the punched body 3 is not printed. When high-precision alignment with the cut line is not required, the inner surface side of the material to be punched 3 is simply supplied to the punching device with the inner surface side facing upward, and the half cut 4 as shown in FIG. It is possible to manufacture the punched body 7 provided on the side of the punched body, and the half-cut 4 is provided on the outer surface side by feeding the punched body 3 with the outer surface side facing upward. 7 can be manufactured (not shown).

Further, for example, when printing is performed on the outer surface side of the object to be punched 3 and the printing and the punching line or the half cut line need to be aligned with high precision,
The control device is added to the punching device, and the punching device 3 is supplied with the outer surface side (printing surface) of the punching device 3 facing downward, and a printing position detecting device is attached to the lower side to print the printing position. Is detected and the punching position is controlled to provide the half cut 4 as shown in FIG. 8 on the inner surface side, and
It is possible to manufacture the punched body 7 in which printing and punching are aligned. Further, the punching body 3 is supplied with the outer surface side (printing surface) of the punching body 3 facing upward, and a printing position detection device is attached to the upper side to detect the printing position and control the punching position. As a result, it is possible to manufacture the punching body 7 in which the half cut 4 is provided on the outer surface side and the printing and the punching are aligned with each other (not shown).

(Punching Body) As the punching body 3, various materials such as synthetic resin film, paper, metal foil such as aluminum foil, single material made of inorganic or organic vapor deposition film, or laminated material can be used. Can be mentioned. The punched body 7 manufactured by using the above-mentioned punching blade structure and a punching die having the punching blade is then formed into a box, a container, a packaging bag, or the like, or used for a seal or a lid. Particularly, when the punched body 7 is used for a seal, a lid material, etc., a half cut can be formed in a part thereof in the punching process to improve the tearability of the manufactured seal, lid material, etc. .

[0059]

EXAMPLES The structure of the punching blade and the punching die of the present invention will be described more specifically below. However, the present invention is not limited to the following examples unless it exceeds the gist.

Example 1 As the material to be punched 3, a PET film (thickness 12 μm) was used for the outer surface layer, an aluminum foil (thickness was 7 μm) for the intermediate layer, and a polyolefin resin film (thickness was used for the inner surface layer (sealant layer)). A laminated film (thickness: 134 μm) was used.

The punched body 3 was provided with test blades having the dimensions shown in Table 1, which were the full cutting blade 1 and the half cutting blade 2 of the first embodiment.
With test blades 1, 2, 5, 6 having full cutting edge 1 of the second form and half cutting blade 2 with test blades 3, 4, 7, 8 having full cutting edge 1 of the first form and half cutting Blade 2 and step cutting blade 12
A lid material that is a punched body 7 by forming a half-cut 4 using a test blade 9 having a cutting edge, a full-cutting edge 1 having a second form, a half-cutting edge 2 and a test blade having a step cutting edge 12. (See FIG. 8). In addition, in Table 2, the test blades 1-10
The thickness of the half-cut portion of the punched body 7 produced by using was shown, and the openability test result after heat sealing was shown.

[0062]

[Table 1]

[0063]

[Table 2]

[0064]

As described above, according to the structure of the punching blade of the present invention, it is difficult to cause the spilling or the breakage of the blade when punching the object to be punched and forming the half cut.
Even when repeated punching is performed, it is possible to continue to punch the outer periphery of the punched object cleanly for all cutting blades, and to continue forming half cuts with good depth accuracy for half cutting blades. . With such a structure of the punching blade, it is possible to cleanly punch the object to be punched, which is formed with a half cut having excellent position accuracy and depth accuracy, in the thickness direction, and a desired tearing force can be obtained from the portion where the half cut is formed. Can be torn with. In addition, in a punching blade having a two-step structure having a blade tip portion having a predetermined blade tip angle θ _2, it is possible to further prevent occurrence of blade spillage and blade breakage at the tip portion.

Further, according to the punching die of the present invention, punching and half-cutting can be performed simultaneously by the full cutting blade and the half-cutting blade provided in the same punching die, so that the accuracy of the half-cut forming position is high. Therefore, it is possible to prevent the occurrence of quality defects due to the positional deviation of the half cut, and it is possible to stabilize the quality and improve the yield. The full-cutting blade and the half-cutting blade provided in this punching die are less likely to cause blade spillage and blade breakage during punching and half-cutting of the object to be punched. It has an excellent effect. Therefore, according to the punching die of the present invention, it is possible to cleanly punch the object to be punched, which is formed with a half cut having excellent positional accuracy and depth accuracy, in the thickness direction, and to obtain a desired portion from the portion where the half cut is formed. It can be torn with a tearing force.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of the structure of a punching blade of the present invention.

FIG. 2 is a cross-sectional view showing another example of the structure of the punching blade of the present invention.

FIG. 3 is a schematic sectional view showing an example of a punching device equipped with a punching die of the present invention.

FIG. 4 is a schematic cross-sectional view showing another example of the punching device equipped with the punching die of the present invention.

FIG. 5 is a cross-sectional view showing an example of a form in which a full cutting edge and a half cutting edge are formed with a predetermined interval.

FIG. 6 is a cross-sectional view showing an example of a form in which full cutting blades and half cutting blades are continuously formed in the blade crossing direction.

FIG. 7 is a cross-sectional view illustrating a portion provided with a half cut.

FIG. 8 is a plan view (a) and AA showing an example of a punched body.
It is sectional drawing (II) of a line.

FIG. 9 is a cross-sectional view showing an example of a mode in which a step cutting blade is formed at a boundary portion where a full cutting blade and a half cutting blade are continuously formed in the blade crossing direction.

[Explanation of symbols]

1 Full cutting blade 2 Half cutting blade 3 Punched body 4 Half cut 5 Punching scrap 6 Picking part 7 Punching body 8 Cutting edge part 9 Tear part 10 Flat plate-shaped die 11 Face plate 12 Step cutting blade 13 Cutting start point 20 Roll shape Cutting die 21 Receiving roll L ₁₁ Height of full cutting blade or half cutting blade L ₁₂ Height of cutting edge T Initial thickness of punched object t Thickness of punched object at the portion where half cut line is provided Height H ₁ Full cutting blade height H ₂ Half cutting blade height H ₃ Step cutting blade height α Difference between full cutting blade and half cutting blade height β Step cutting blade width W Cutting edge thickness D Width of blade root θ, θ ₁ Blade angle θ ₂ Blade tip angle

Continued front page    F-term (reference) 3C060 AA01 AA04 AB01 BA03 BB01                       BC01 BD01 BD03 BE07                 3E075 BA01 BA41 DB07 DB16 DB19                       DB22 GA02

Claims (7)

[Claims] 1. A structure of a full cutting blade for punching a punched object in a thickness direction and a half cutting blade for half-cutting the punched object in a thickness direction, wherein the full cutting blade and the half cutting blade are: The blade angle (θ) is 10 to 60 ° and the blade thickness is 0.001 to 0.001.
Punching blade structure characterized by being 0.1 mm. 2. A structure of a full cutting blade for punching a punched object in the thickness direction and a half cutting blade for half-cutting the punched object in the thickness direction, wherein the full cutting blade and the half cutting blade are: 10
It has a cutting edge portion having a blade tip angle (θ ₂ ) of -60 °, the blade angle (θ ₁ ) is smaller than the blade tip angle θ ₂ and 5 to 50 °, and the blade thickness is 0.001 to 0. .1 mm
And the height of the blade edge portion (L _12), wherein in relation to the total cutting edge or semi cutting edge height (L _11), L ₁₁
> L _12> structure of the punching blade, characterized in that L is _11/2. 3. A punching die provided with a full cutting blade for punching a punched object in the thickness direction and a half cutting blade for half-cutting the punched object in the thickness direction. The half-cutting blade is a punching die having a blade angle (θ) of 10 to 60 ° and a blade edge thickness of 0.001 to 0.1 mm. 4. A punching die provided with a full cutting blade for punching a punched object in the thickness direction and a half cutting blade for half-cutting the punched object in the thickness direction. The half-cutting blade has a blade tip portion having a blade tip angle (θ ₂ ) of 10 to 60 °, the blade angle (θ ₁ ) is smaller than the blade tip angle θ ₂ and 5 to 50 °, and the blade edge thickness is Is 0.0
01 to 0.1 mm, the height of the cutting edge portion (L ₁₂ ).
But wherein in relation to the total cutting edge or semi cutting edge height _{(L 11), L 11>} L 12> punching die, which is a L _11/2. 5. The punching die according to claim 3, wherein the full cutting edge and the half cutting edge are provided at a predetermined interval. 6. The punching die according to claim 3, wherein the full cutting blade and the half cutting blade are continuously provided in a blade crossing direction. Wherein said difference between the height of the entire cutting edge (H ₁₎ and the half-cutter height _{(H 2) (H 1 -H} 2) is, 5 [mu] m or more, is H _1/2 or less The punching die according to any one of claims 3 to 6, wherein: