Elastic body for punching blade die, method for disposing elastic body for punching blade die, and punching blade die

Abstract

To provide an elastic body for a punching blade die capable of restraining inconvenience caused by applying force to a punching blade by pressing an edge surface of the elastic body expanded in the horizontal direction.SOLUTION: The elastic body 4 for the punching blade die is arranged and fixed to the inside, the outside or both of the inside and the outside of the base part 3 and the punching blade 2 fixed to the base part 3, and separates the punching object from the punching blade 2. The elastic body 4 for the punching blade die has a cover area S2 for covering the inside and the outside of the punching blade 2, and has a pressing restraining hole 5 for restraining the punching blade 2 from being pressed inward or outward or by an edge surface of the elastic body 4 for the punching blade die, in a corresponding peripheral area where at least the punching blade 2 exists.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an elastic body used in punching blade dies such as spiral blades and Thomson blades (Viking blades), and to a punching blade die using the elastic body. [Background technology]

[0002] When punching materials such as cardboard, corrugated cardboard, various sheets, or plate-like materials, a spiral blade or a Thomson blade may be used. The name "mainspring blade" comes from the fact that it is made by cutting out the required length from a single long blade similar to the mainspring used in wind-up watches. Mainspring blades are often used in the cutting process for printing stickers and labels.

[0003] On the other hand, unlike the spiral blade, the Thomson blade is generally used not only to punch paper containers, but also to punch thick materials such as molded products, food trays, rubber, sponge, etc. The work to be punched is placed on a base such as an iron plate, and the spiral blade and Thomson blade are moved until they kiss the base, and the entire length of the cutting edge is pressed against the work to cut. Furthermore, as in Patent Document 1, elastic bodies such as cushioning materials that push back scraps from the punched material are usually provided inside and outside the punching blade. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5425321 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, when an elastic body is provided inside a punching blade formed into a ring shape or the like, the outer edge surface of the elastic body can be brought as close as possible to the punching blade to improve the holding ability and accuracy of the punched object when punching. However, when punching, the elastic body is compressed and expands outward, so that the outer edge surface that expands horizontally from the inside presses against the punching blade, causing the punching blade to deform, making it impossible to secure the specified punching position or achieve precision. Also, even when an elastic body is provided on the outside of the punching blade, the expansion of the elastic body can cause the punching blade to deform.

[0006] The present invention has been made to solve the above problems. The object of the present invention is to provide an elastic body for a punching blade mold that can suppress inconveniences caused by the edge surface of the elastic body expanding horizontally pressing and applying force to the punching blade in a configuration in which the elastic body is placed on the inside, outside, or both of the punching blade. Another object of the present invention is to provide a method for arranging elastic bodies for a punching blade die and a punching blade die that can prevent the occurrence of the above-mentioned problems. [Means for solving the problem]

[0007] The elastic body for a punching blade die according to the first aspect of the present invention is An elastic body for a punching blade die, which is arranged and fixed to an inner side, an outer side, or both the inner side and the outer side of a base part and a punching blade fixed to the base part, for separating an object to be punched from the punching blade, The elastic body for the punching blade mold has a cover area that covers the inside and outside of the punching blade, and is characterized in that it has a pressure suppression hole in at least the corresponding peripheral area where the punching blade is present, which suppresses the edge surface of the elastic body for the punching blade mold from pressing against the punching blade from the inside or outside.

[0008] A second aspect of the present invention is the elastic body for a punching blade die according to the first aspect, characterized in that the pressure suppression holes are provided on the entire surface of the elastic body for a punching blade die. A third aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the punching blade is formed in a ring shape.

[0009] A fourth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the punching blade is formed in a straight or curved shape rather than a ring shape. A fifth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the opening ratio of the pressure suppression holes relative to the elastic body for a punching blade die is 10% or more and 80% or less.

[0010] A sixth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the hardness of the elastic body for a punching blade die measured on an Asker rubber hardness scale is 10 or more and 90 or less. A seventh aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the amount of protrusion of the elastic body for a punching blade die from the surface of the base part when no pressure is applied to the object to be punched is greater than the amount of protrusion of the punching blade from the base part.

[0011] An eighth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression holes are formed at an arrangement density that makes the degree of expansion and contraction of the elastic body for a punching blade die uniform. A ninth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the shape of the pressure suppression hole is a regular polygon or a circle.

[0012] A tenth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression hole has a regular cross shape. An eleventh aspect of the present invention is an elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression holes are composed of a plurality of types of pressure suppression holes that differ in at least one of area and shape.

[0013] A twelfth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression hole is configured as a through hole. A thirteenth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression holes are provided in a uniform arrangement that suppresses horizontal fluctuations of the elastic body for a punching blade die.

[0014] A fourteenth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, The device is characterized in that it has a rectangular individual part and a connecting part that connects the individual parts in one direction, and a circular hole is provided at the center position of each of the individual parts as the pressure suppression hole when viewed in a plane, and the width of the connecting part is formed small by a circular notch.

[0015] A method for arranging an elastic body for a punching blade die according to a fifteenth aspect of the present invention comprises: a base portion to which a punching blade is fixed; An elastic body for a punching blade die is used, the punching blade die elastic body has a covering area that covers the inside and outside of the punching blade, and has a pressure suppression hole in at least a peripheral area corresponding to the punching blade that suppresses the edge surface of the punching blade die elastic body from pressing the punching blade from the inside or outside, After the punching blade has punched out the elastic body for the punching blade die, The punching blade die elastic body after punching is disposed and fixed at a required position on the inside, outside or both the inside and outside of the punching blade.

[0016] A punching blade according to a sixteenth aspect of the present invention comprises: A punching blade and a base portion to which the punching blade is fixed; and an elastic body for a punching blade die, The elastic body for the punching blade mold has a cover area that covers the inside and outside of the punching blade, and is characterized in that it has a pressure suppression hole in at least the corresponding peripheral area where the punching blade is present, which suppresses the edge surface of the elastic body for the punching blade mold from pressing against the punching blade from the inside or outside. [Effects of the Invention]

[0017] The present invention can provide an elastic body for a punching blade mold that, in a configuration in which the elastic body is placed on the inside, outside, or both of the punching blade, can suppress inconveniences that occur when the edge surface of the elastic body that expands horizontally presses and applies force to the punching blade. Similarly, it is possible to provide a method for arranging elastic bodies for a punching blade die and a punching blade die that can prevent the occurrence of inconveniences. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 2 is a plan view of an elastic body for a punching blade die according to an example of the present embodiment. [Figure 2] FIG. 2 is a perspective view showing an example of a Thomson punching die for cutting a punched object in this embodiment. [Figure 3] 10 is a plan view showing the positional relationship after punching with the punching blade in a configuration using an elastic body for a punching blade die in which pressure suppression holes are provided on the entire surface of the elastic body in this embodiment. FIG. [Figure 4] FIG. 10 is a vertical cross-sectional view of the state before punching is performed in the case where a configuration is adopted in which an elastic body for a punching blade die is arranged and fixed inside the punching blade in this embodiment. [Figure 5] FIG. 2 is a vertical cross-sectional view during punching in the present embodiment. [Figure 6] FIG. 10 is a plan view showing a configuration in which a ring-shaped punching blade having a complex shape is used in the present embodiment. [Figure 7] FIG. 10 is a plan view showing the positional relationship after punching with a punching blade in a configuration using a non-annular punching blade in the present embodiment. [Figure 8] 10 is a plan view showing another example of the configuration of the elastic body for the punching blade die according to the embodiment. FIG. [Figure 9] 10 is a plan view showing the positional relationship of the elastic body for the punching blade die according to the embodiment after punching with the punching blade. FIG. [Figure 10] 1(a) to 1(e) are plan views showing examples of pressure suppression holes provided in the elastic body for the punching blade die according to the present embodiment. [Figure 11] 10A and 10B are diagrams showing an example in which a pressure suppression hole in an elastic body for a punching blade die is formed of an irregularly shaped body. [Figure 12] 10A and 10B are views showing another example in which the pressure suppression hole of the elastic body for the punching blade die is formed of an irregularly shaped body. [Figure 13] FIG. 2 is a perspective view showing an example of a punching blade according to the present embodiment. [Figure 14] 14 is an enlarged plan view, partly cut away, of an elastic body for a punching blade die used in the punching blade die shown in FIG. 13. FIG. [Figure 15] FIG. 10 is a plan view showing a state in which a conventional elastic body for a punching blade die is attached to the entire surface. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an elastic body for a punching blade die, a method for arranging an elastic body for a punching blade die, and a punching blade die according to one embodiment of the present invention will be described with reference to the drawings. The punching blade die in which the elastic body for a punching blade die is arranged will be described first. The elastic body 4 for a punching blade die will be abbreviated as elastic body 4 where appropriate. [First embodiment] 1 to 5 are diagrams for explaining a first embodiment of the present invention. As shown in Fig. 2, the punching blade die 1 according to this embodiment has a configuration in which a punching blade 2 protrudes from a rectangular base portion 3. In Fig. 2, for simplicity, some of the pressure suppression holes 5 in the elastic body 4 are omitted.

[0020] <Base part 3> As shown in Figure 2, the base part 3, also called a die board, is an example configured with a back plate part 10 to which the punching blade 2 is attached and a holding part 11 (which can also be called a base material part) that supports the punching blade 2. The back plate part 10 is made of an aluminum plate or the like, and the holding part 11 is made of an acrylic plate or the like. The back plate part 10 and the holding part 11 may be made of a transparent material.

[0021] <Punching blade 2> The punching blade 2 is configured to protrude a predetermined length from the surface of the base part 3 (the surface of the lowest holding part 11 (closest to the object to be punched) in the case of multiple layers), and in the case of a spring blade, it is often configured with a blade height of 1 mm or more and 10 mm or less, and in the case of a Thomson blade, it is often configured with a blade height of 1 mm or more and 100 mm or less.

[0022] The punching blade 2 can be configured in a ring shape that divides the inside and outside when viewed from above. Also, as will be described later, the punching blade 2 can be configured in a non-ring shape, such as a straight or curved shape. In this embodiment, the punching blade 2 is configured in a rectangular ring shape with right angles at the four corners. The shape of the ring is determined by the shape of the object 7 to be punched, such as paper, cardboard, sheet material, metal plate, sponge, etc., and the unevenness and curves formed around the ring shape are determined accordingly. In this specification, the term "ring" is used to include shapes such as circles, polygons such as rectangles, and the outer edge shapes of closed curved surfaces.

[0023] <Punching Blade Die Elastic Body 4 and Punching Blade Die Elastic Body Arrangement Method> The configuration of the elastic body 4 and the elastic body arrangement method of this embodiment will be described. An elastic body 4 is used that has a cover area S2 that covers the inside and outside of the assumed punching blade 2, and that has pressure suppression holes 5 evenly provided over the entire surface of the elastic body 4. Then, by punching the elastic body 4 with the punching blade 2 provided on the base part 3 as shown in Figure 2, it is possible to arrange the elastic body 4 covering the entire surface both inside and outside the punching blade 2 as shown in Figure 3. In Figure 3, 4A indicates the elastic body 4 located inside the punching blade 2, and 4B indicates the elastic body 4 located outside the punching blade 2. However, if necessary, it is possible to fix only the inside, for example, only the elastic body 4A on the inside of the punching blade 2 and remove the outer elastic body 4B as shown in Figures 4 and 5. Conversely, it is also possible to fix only the outer elastic body 4B of the punching blade 2.

[0024] The pressure suppression holes 5 provided in the elastic body 4 are preferably provided over the entire surface of the elastic body 4, as this can accommodate any arrangement and shape of punch blade 2. The presence of the pressure suppression holes 5 allows for portions that come into contact with the punch blade 2, such as the solid portion 17 (straight portion) in Figure 14, and portions that do not come into contact with the punch blade 2, such as the circular cutout 19, so that the pressure applied to the punch blade 2 when the elastic body 4 expands in the horizontal direction can be made sufficiently small to cause no problems. However, the present invention does not exclude the manufacture and sale of an elastic body 4 in which the pressure suppression holes 5 are not provided over the entire surface of the elastic body 4, but only in the peripheral region corresponding to the presence of the punch blade 2.

[0025] In the configuration of Fig. 3, five rectangular ring-shaped punching blades 2 with rounded corners as shown in Fig. 2 are provided on a base part 3. By punching out a flat plate-shaped elastic body 4 with pressure suppression holes 5 evenly opened all over its surface so as to cover the entire inside and outside of the punching blades 2, it is possible to create a configuration in which the elastic body 4 is arranged and fixed on both the inside and outside of each of the five punching blades 2.

[0026] The surface of the elastic body 4 that abuts against the punching blade 2 from the inside or outside is reduced in contact area due to the presence of the pressure suppression hole 5, and when the elastic body 4 is compressed in the vertical direction during punching, the pressure suppression hole 5 in the middle can deform, thereby reducing the force applied from the inside or outside of the punching blade 2.

[0027] Furthermore, in this method of arranging an elastic body for a punching blade mold, the elastic body 4 having the pressure suppression hole 5 is punched out in a manner that the elastic body 4 covers the entire inside and outside of the punching blade 2, so that the elastic body 4 can be held so as to support the punching blade 2 from the inside and outside, and the elastic body 4 can be arranged well in a state that is almost in contact with the inside or outside of the punching blade 2.

[0028] FIG. 15 is a plan view showing an example of a conventional elastic body 4 in which sponge is attached to the entire surface. In contrast to the configuration of this embodiment, the conventional method of attaching the elastic body 4 shown in Fig. 14 is a configuration in which a flat elastic body 4 without pressure suppression holes 5 is attached, so the edge surfaces of the elastic body 4 come into contact with the entire inner and outer surfaces of the punching blade 2. With this configuration, there was a problem that if the force acting on the punching blade 2 increases due to slight misalignment of the elastic body 4 or various other factors that cause the elastic body 4 to expand when pressed against the punching blade 2, the punching blade 2 would be deformed.

[0029] The elastic body 4 according to this embodiment is a cushioning material provided for the punching blade 2, and can be made of any material commonly used for various types of rubber materials (sponges) used for springing out. It is made of a material with predetermined compressibility and restorability depending on the desired use of the punching blade die 1. For example, the following materials can be given as examples of such materials.

[0030] (1) Urethane rubber, which is flexible, durable, and has high resilience, and can withstand repeated use. (2) Silicone rubber, which has high temperature resistance, is resistant to chemicals, and can be adjusted to the desired hardness. (3) Foam rubber (sponge rubber) is flexible, easy to process into fine shapes, and highly durable. (4) Lightweight and highly shock-absorbing EVA foam (5) Various types of cork that are lightweight and have good resilience; (6) Various felt materials that are flexible, moderately hard, and resistant to wear The hardness of the elastic body 4 as measured by the Asker rubber hardness scale is preferably 10 or more and 90 or less, more preferably 15 or more and 80 or less, and the range most commonly used is 15 or more and 75 or less.

[0031] When the elastic body 4 is provided inside the punching blade 2, it is usually fixed to the surface of the holding part 11 by a predetermined fixing method. One such fixing method is to apply an adhesive such as glue to the bottom surface of the elastic body 4 and attach it directly to the base part 3 serving as a die board. Another method is to attach the elastic body 4 to the base part 3 using an intervening layer such as double-sided tape or a magnetic sheet. Alternatively, a mechanical fixing method such as fixing a cushion member to the die board with screws or bolts can be used if necessary. However, since any known method or means can be used as appropriate for providing the elastic body 4 inside or outside the punching blade 2, the present invention is not limited to that attachment method.

[0032] As shown in FIGS. 1, 3 and 6, the covering area S2 of the elastic body 4 must be large enough to cover the outside as well as the inside area S1 of the punching blade 2 and to punch through stably.

[0033] Because the elastic body 4 is a consumable item, the elastic body 4 of each punching die 1 adopted by each client is replaced at regular intervals or when worn out. For this replacement, the manufacturer of the punching die 1 provides the client with an elastic body 4 corresponding to the workpiece adopted by the client by mail or other means. Essentially, it is sufficient to provide the client with a large sponge measuring 500mm x 500mm or 1000mm x 500mm with holes drilled all over. Furthermore, the manufacturer can maintain the condition of the elastic body 4 in good condition by replacing worn-out elastic bodies 4 as needed. In this way, the elastic body 4 of the present invention is provided to the client as a standalone replacement part.

[0034] <Pressure suppression hole 5> The pressure suppression hole 5 is a hole provided in the elastic body 4, and is preferably configured as a through hole that penetrates the elastic body 4. However, as long as the hole configuration can achieve the predetermined pressure suppression function in this embodiment, it does not exclude that the pressure suppression hole 5 is formed as a hole with a bottom at a position on the side of the base part 3. Furthermore, the pressure suppression hole 5 may be provided at least in the peripheral area corresponding to the punching blade 2 so as to suppress the edge surface of the elastic body 4 from pressing the punching blade 2 from the inside or outside.

[0035] Generally, when pressure is applied to the large-area elastic body 4 so as to sandwich it from above and below, the center, intermediate, and peripheral parts of the elastic body 4 expand horizontally to different degrees of deformation, and therefore the arrangement of the pressure suppression holes 5 is determined so that the pressure suppression holes 5 absorb the deformation in each part in relation to the position of the punching blade 2. As described above, it is preferable to provide the pressure suppression holes 5 so that they are positioned approximately uniformly over the entire surface area of ​​the elastic body 4.

[0036] On the other hand, since the punching blade die 1 performs punching operations multiple times continuously over time, it is necessary to have an area per unit that can obtain shape restoring properties so that the horizontal deformation absorbed in each part of the elastic body 4 can return to its original state so that punching waste can be removed efficiently.

[0037] Therefore, the following conditions can be exemplified as preferable conditions for the elastic body 4. (1) Opening ratio of pressure suppression hole 5 The opening ratio of the pressure suppression holes 5 to the elastic body 4 is preferably 10% to 80%, and more preferably 30% to 60%. If it is less than 10%, there is a high possibility that the deformation of the elastic body 4 will not be absorbed, and if it exceeds 80%, the repulsive force will decrease and the effect of removing punched chips will be reduced, which is not preferable.

[0038] (2) Uniformity of arrangement of pressure suppression holes 5 During punching, the pressure suppression hole 5 is subjected to a force from all around, which causes it to deform (expand) inward, so a uniform hole is used, which uniforms the degree of horizontal expansion and contraction per unit area of ​​the elastic body 4.

[0039] The above-mentioned "uniformization" means that the pressure suppression holes 5 are uniformly arranged so as to achieve horizontal deformation absorption and shape restoration of the pressure suppression holes 5 even after multiple uses, and are substantially satisfactory in terms of suppressing pressure on the punching blade 2 and removing punching waste. This uniformity can be understood from the regularity of the pressure suppression holes 5 shown in FIGS.

[0040] (3) Size of pressure suppression hole 5 The maximum length in the horizontal direction (horizontal and vertical directions) of the pressure suppression hole 5 (for example, the diameter in the case of a circular pressure suppression hole 5, or the length of the diagonal in the case of a square) is preferably 1 mm or more and 10 mm or less, and more preferably 2 mm or more and 5 mm or less. As shown in Fig. 8, a configuration in which pressure suppression holes 5 of multiple sizes or shapes coexist can also be employed.

[0041] (4) Shape of pressure suppression hole 5 In this embodiment, circular through holes as shown in Figures 1 to 5 are used as the pressure suppression holes 5. However, pressure suppression holes 5 having shapes other than circular as shown in Figures 10 to 12 can also be used. These pressure suppression holes 5 will be described in the fourth embodiment.

[0042] The operation of this embodiment will be briefly described below, mainly with reference to FIGS. Fig. 4 is a cross-sectional view taken along a cutting line (not shown) that crosses the pressure suppression hole, showing the state before punching. Fig. 5 is a view showing how the elastic body of Fig. 4 is compressed during punching. The configurations shown in Figures 4 and 5 show the case where, when an elastic body 4 having a cover area S2 that covers the inside and outside of the punching blade 2 as shown in Figure 3 is punched, the outer elastic body 4 is removed and the elastic body 4 is positioned and fixed only on the inside of the punching blade 2. 4 and 5, the degree of deformation of each portion, such as the diameter D1 to diameter D2 of the pressure suppression hole 5, is drawn much larger than it actually is in order to clearly emphasize the effect of this embodiment.

[0043] The punching blade die 1 shown in Fig. 4 has a different configuration from the base part 3 shown in Fig. 2, and has a punching blade 2 fixed to the base part 3 formed from a single metal plate or the like so as to protrude downward in Fig. 4. Although Fig. 4 illustrates a configuration in which the punching blade die 1 descends toward the object 7 to be punched, as long as the punching blade die 1 can move relative to the object 7 to punch the object 7, the setting of the direction of relative movement, such as up, down, left, or right, can be changed as appropriate.

[0044] 4 has six through holes as an example of pressure suppression holes 5, and the upper surface of the elastic body 4 is firmly fixed to the lower surface of the base part 3 with an adhesive or the like. If necessary, a positioning part (not shown) for attaching the elastic body 4 may be provided on the lower surface of the base part 3. Examples of such a positioning part include a recess into which the upper surface of the elastic body 4 is fitted, a positioning protrusion, or other engaging structure with the upper surface of the elastic body 4 or the lower surface of the base part.

[0045] In the state before punching shown in Fig. 4, the height of the elastic body 4 is set so that the amount by which the elastic body 4 protrudes from the underside of the base part 3 is greater by a length T than the amount by which the punching blade 2 protrudes from the base part 3. The length T is set to a length that allows for good punching processing, depending on the material of the workpiece 7 and the material (compressibility) of the elastic body 4. Note that in this embodiment, even if the amount by which the elastic body 4 protrudes from the underside of the base part when no pressure is applied is the same as or smaller than the amount by which the punching blade 2 protrudes from the base part 3, it is also acceptable as long as it allows punching waste to be easily ejected from the punching member.

[0046] When the punching blade 2 is lowered from the state shown in FIG. 4 as indicated by the arrow, the tip of the punching blade 2 cuts the workpiece 7 so as to punch it, as shown in FIG. 5, thereby obtaining a punched member 12 of a predetermined shape.

[0047] In the state shown in Figure 5, the portions of the elastic body 4 present between the pressure suppression holes 5 expand horizontally due to pressure from above, as shown in Figure 5, but the pressure suppression holes 5 deform from diameter D1 to diameter D2 to absorb the deformation of each portion of the surrounding elastic body 4, and therefore the force with which the straight portions of the elastic body 4 abutting the inner surface 2a of the punching blade 2 other than the pressure suppression holes 5 of the elastic body 4 (not shown in Figure 5; see, for example, the straight portion of solid portion 17 in Figure 14) press against the inner surface 2a of the punching blade 2 is suppressed to a smaller value by the amount of the pressure suppression holes 5. Therefore, it is possible to suppress or prevent the edge surfaces of the elastic body 4 from pressing outward against the inner surface 2a of the punching blade 2, resulting in deformation of the punching blade 2, which is an inconvenience.

[0048] One feature of this embodiment is that pressure suppression holes 5 are provided in the peripheral area corresponding to the punching blade 2 to isolate the expansion action in each part of the elastic body 4 when pressure is applied so as to prevent large horizontal expansion in the straight part where the punching blade 2 abuts.

[0049] As described above, the pressure suppression holes 5 are of a uniform type that uniforms the degree of horizontal expansion and contraction in the entire circumferential direction per unit area of ​​the elastic body 4. Therefore, the protrusion into the pressure suppression holes 5 due to deformation of the material of the elastic body 4 caused by compression in each region (or the entire region) of the elastic body 4, and the ability of the pressure suppression holes 5 to return to their original shape can be uniform, allowing the elastic body 4 to maintain stable function even when used for a long period of time.

[0050] [Second embodiment] Fig. 6 is a plan view showing an example of an irregularly shaped ring-shaped punching blade 2, rather than a square or round ring-shaped punching blade 2. Fig. 6 shows a star-shaped ring-shaped punching blade 2 as an irregularly shaped body. Even with annular punching blades 2 of various shapes, by providing pressure suppression holes 5 on the entire surface of the elastic body 4, the force acting on the punching blades 2 from the inside or outside can be reduced. If the punching blade 2 has a complex ring-shaped configuration, such as a star with a thin tip, as shown in Figure 6, it would be extremely difficult to position and fix the punching blade 2 and the elastic body 4 with an adhesive or the like in the small gap, for example, a gap of 1 mm. Even with such a complex and detailed configuration, the elastic body 4 can be attached satisfactorily by using the method of the present invention and providing pressure suppression holes 5 in a large elastic body 4 that has a covering area that covers the inside and outside of the punching blade.

[0051] [Third embodiment] Fig. 7 is a plan view showing a third embodiment. The punching blade 2 of the present invention is not limited to annular punching blades 2, and punching blades 2 formed in a non-annular straight or curved shape (not shown in Fig. 7) can also be used. Fig. 7 shows punching blades 2 extending in the horizontal direction and punching blades 2 extending in the vertical direction. This is because even if the shape is not circular but linear or curved, force is applied from both sides of the punching blade 2 during punching. Furthermore, this third embodiment employs a configuration in which a single linear blade is alternately punched to punch small (thin) seals. Specifically, in Figure 7, by cutting while feeding the base part 3 in the feed direction at 5 mm intervals, it is possible to configure the die so that thin seals (in this case, for example, 110 mm x 5 mm) can be cut out, for example, 10 pieces per shot.

[0052] [Fourth embodiment] In the fourth embodiment, a modified example of the pressure suppression hole 5 will be described below. 8 and 9 are diagrams of the elastic body 4 for explaining an example of the fourth embodiment, and are plan views of the elastic body 4 in which circular pressure suppression holes 5 are formed. In particular, FIG. 8 shows an example in which a plurality of types of pressure suppression holes 5 with different sizes are provided, and FIG. 8 shows an example in which two types of sizes are provided.

[0053] 8, the elastic body 4 has two types of pressure suppression holes 5: large holes 5d with large diameters and small holes 5s with small diameters. The large holes 5d and small holes 5s are arranged in the row direction 14 and column direction 15 so that the same holes appear at positions spaced apart by one, with the small holes 5s next to the large holes 5d and the large holes 5d next to the large holes 5d in the row direction 14 and the column direction 15.

[0054] In this configuration, taking row 14 as an example, the positions of the large holes 5d in one row 14 in Figure 8 are staggered with the positions of the large holes 5d in the vertically adjacent rows. Similarly, the positions of the small holes 5s in one column 15 in Figure 8 are staggered with the positions of the small holes 5s in the horizontally adjacent columns.

[0055] The configuration of the pressure suppression holes 5 shown in Fig. 9 is a diagram illustrating an embodiment in which a large number of pressure suppression holes 5 of the same type are formed in the elastic body 4. The pressure suppression holes 5 of this elastic body 4 are configured as through holes with a diameter of 3φ (3 mm) formed in a staggered pattern, and the opening ratio is approximately 40% (39.25%). With such an increased aperture ratio, deformation due to expansion from all directions at each part of the elastic body 4 made of a specified material can be absorbed by the pressure suppression holes 5. In a configuration in which circular pressure suppression holes 5 are used and they are arranged alternately in the row direction as shown in Figure 9, the preferred range of diameter φ is 2φ or more and 20φ or less.

[0056] 10(a) to 10(e) are diagrams showing other configurations of the fourth embodiment of the present invention. Figure 10(a) shows a configuration in which the pressure suppression holes 5 are arranged in the shape of an equilateral triangle, Figure 10(b) shows a configuration in which the pressure suppression holes 5 are arranged in the shape of a regular square, Figure 10(c) shows a configuration in which the regular squares are arranged in the shape of a diamond, Figure 10(d) shows a configuration in which the pressure suppression holes 5 are arranged in the shape of a regular hexagon, and Figure 10(e) shows a configuration in which circular holes having the two types of diameters mentioned above are arranged.

[0057] In this configuration, not only circular holes but also various shapes can be used around the pressure suppression holes 5 as long as they satisfy the absorbency during deformation and the restorability after compression.

[0058] In this case, the first important point to consider when providing the pressure suppression holes 5 is that, as described above, no pressure suppression holes 5 are located in the same position in the row and column directions, but are arranged alternately. The second important point is that the shape and arrangement of each pressure suppression hole 5 are such that they are substantially uniform in response to the deformation and expansion force received from the surrounding area of ​​the pressure suppression hole 5.

[0059] Regarding the second point, the pressure suppression hole 5 can be configured as a regular polygon (a polygon in which each side has the same length and the central angle formed by each side is the same) or a circle. Examples of regular polygons include an equilateral triangle, square, regular pentagon, regular hexagon, regular octagon, ..., and a circle as the final shape.

[0060] 11 and 12 are diagrams showing examples of pressure suppression holes 5 that are formed in irregular shapes other than regular polygons or circles. In this case, an example is shown in which the irregular-shaped pressure suppression hole 5 is configured in the shape of a regular cross. A regular cross is a cross formed by two wide straight lines of equal length intersecting at right angles. The regular cross shown in Figures 11 and 12 is an example in which a square is placed at the center, with two squares of the same size connected to it, one above, one below, one to the left, and one to the right. Because the pressure suppression hole 5 is formed by squares of the same size on the top, bottom, left, and right sides, the surface cut by the punching blade 2 also has the same uniformity.

[0061] Fig. 11 shows a configuration in which the horizontal direction of the elastic body 4 coincides with the horizontal direction of the regular cross, and Fig. 12 shows a configuration in which the horizontal direction of the regular cross is tilted at an angle of 45° with respect to the horizontal direction of the elastic body 4. Even with pressure suppression holes 5 of such irregular shapes, the arrangement allows for a uniform degree of expansion and contraction per unit area. In addition, although not shown, pressure suppression holes 5 having irregular shapes such as rectangles, trapezoids, and ellipses can also be used as long as they can achieve a certain degree of uniformity.

[0062] [Fifth embodiment] 13 and 14 are diagrams showing an example of the configuration of the fifth embodiment of the present invention. The fifth embodiment is an example of a punching blade die 1 for forming punched members, and has a back plate portion 10 made of metal or the like as a base portion and a holding portion 11 made of transparent resin. A long, thin, rectangular punching blade 2 is provided in the center of the holding portion 11. An elastic body 4 having a pressure suppression hole 5 is provided inside the punching blade 2.

[0063] The elastic body 4 according to the fifth embodiment has a shape as shown in the plan view of FIG. This elastic body 4 has rectangular solid portions 17 (straight portions) and connecting portions 18 that connect the solid portions 17 so that they are continuous in one direction (the longitudinal direction in the case shown in Figure 9). In this fifth embodiment as well, the elastic body 4 is arranged and fixed only inside the punching blade 2 by the method for arranging an elastic body for a punching blade die of the present invention.

[0064] A circular hole is provided in the center of each solid part 17 in plan view as a pressure suppression hole 5. Furthermore, each connecting part 18 is formed with a small vertical width due to the circular pressure suppression hole 5 and circular cutout 19. In the configuration shown in Figures 13 and 14, the circular cutout 19 is formed as a semicircular cutout having approximately the same diameter as the pressure suppression hole 5. The surface of the solid part 17 facing the punching blade 2 is in contact with the inner surface of the punching blade 2, but the presence of the circular cutout 19 prevents the punching blade 2 from deforming during punching.

[0065] It is preferable that the rectangular shape of the solid portion 17 is a square in order to absorb and restore expansion in each direction. Also, in this embodiment, the shapes of a circular hole, a circular notch, and a square are also included, and are considered to be substantially equivalent in terms of the effectiveness of the present invention. With this configuration of the elastic body 4, when forming a punching member, by providing an elastic body 4 having a shape as shown in Figure 9, even if the punching blade 2 is long and slender, which would be affected by the pressing force of the elastic body 4 acting on the punching blade 2 in a conventional configuration, the configuration of this embodiment prevents the punching blade 2 from deforming, allowing for good punching processing.

[0066] Although the present invention has been described above by way of example of an embodiment, the technical scope of the present invention is not limited to the configurations described in the above embodiment. The technical scope of the present invention should be determined based on the claims, and it goes without saying that various modifications, additions to the configuration, and improvements can be made within that scope. [Explanation of symbols]

[0067] 1: Punching blade 2: Punching blade 2a: Inner surface of punching blade 3: Base 4: Elastic body for punching blade die (elastic body) 4A: Elastic body located inside the punching blade 4B: Elastic body located outside the punching blade 5: Pressure suppression hole 17: Individual part 18: Connection 19:Circular cutout T: The difference between the amount of protrusion of the elastic body from the base when no pressure is applied and the amount of protrusion of the punching blade from the base S1: inner area of ​​punching blade S2: Coverage area of ​​elastic body for punching blade die

Claims

1. An elastic body for a punching blade die, which is arranged and fixed to an inner side, an outer side, or both the inner side and the outer side of a base part and a punching blade fixed to the base part, for separating an object to be punched from the punching blade, The elastic body for a punching blade mold has a cover area that covers the inside and outside of the punching blade, and has pressure suppression holes in at least the corresponding peripheral area where the punching blade is present, which suppress the edge surface of the elastic body for a punching blade mold from pressing against the punching blade from the inside or outside.

2. 2. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression holes are provided on the entire surface of the elastic body for a punching blade die.

3. 3. The elastic body for a punching blade die according to claim 1, wherein the punching blade is formed in a ring shape.

4. 3. The elastic body for a punching blade die according to claim 1, wherein the punching blade is formed in a straight or curved shape other than a ring shape.

5. 3. The elastic body for a punching blade die according to claim 1, wherein an opening ratio of the pressure suppression holes with respect to the elastic body for a punching blade die is 10% or more and 80% or less.

6. 3. The elastic body for a punching blade die according to claim 1, wherein the hardness of the elastic body for a punching blade die measured by an Asker rubber hardness scale is 10 or more and 90 or less.

7. 3. The elastic body for a punching blade die according to claim 1, wherein the amount of protrusion of the elastic body for a punching blade die from the surface of the base portion when no pressure is applied to the object to be punched is greater than the amount of protrusion of the punching blade from the base portion.

8. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression holes are formed at an arrangement density that makes the degree of expansion and contraction of the elastic body for a punching blade die uniform.

9. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression hole has a shape of a regular polygon or a circle.

10. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression hole has a regular cross shape.

11. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression holes are made up of a plurality of types of pressure suppression holes that differ in at least one of area and shape.

12. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression hole is formed as a through hole.

13. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression holes are provided in a uniform arrangement that suppresses horizontal fluctuations of the elastic body for a punching blade die.

14. 3. An elastic body for a punching blade mold as described in claim 1 or claim 2, which has rectangular individual parts and connecting parts that connect the individual parts in one direction, and a circular hole that serves as the pressure suppression hole in a planar view is provided at the center position of each of the individual parts, and the connecting parts are formed with a circular notch so that the width of the connecting parts is reduced.

15. a base portion to which a punching blade is fixed; An elastic body for a punching blade die is used, the punching blade die elastic body has a covering area that covers the inside and outside of the punching blade, and has a pressure suppression hole in at least a peripheral area corresponding to the punching blade that suppresses the edge surface of the punching blade die elastic body from pressing the punching blade from the inside or outside, After the punching blade has punched out the elastic body for the punching blade die, A method for arranging an elastic body for a punching blade die, characterized in that the elastic body for a punching blade die after being punched is arranged and fixed at a required position on the inside, outside, or both the inside and outside of the punching blade.

16. A punching blade and a base portion to which the punching blade is fixed; and an elastic body for a punching blade die, The punching blade die is characterized in that the elastic body for the punching blade die has a cover area that covers the inside and outside of the punching blade, and has a pressure suppression hole in at least the corresponding peripheral area where the punching blade is present, which suppresses the edge surface of the elastic body for the punching blade die from pressing against the punching blade from the inside or outside.

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