JP6656452B2 - Die for corrugated cardboard sheet and punching method for corrugated cardboard sheet - Google Patents

Description

  The present invention relates to a punching die for corrugated cardboard sheets and a punching method for corrugated cardboard sheets, and more particularly, when punching a punched blank from a corrugated cardboard sheet, by simultaneously cutting and separating beard-like chips remaining on the cut end face of the punched blank. The present invention also relates to a corrugated sheet punching die and a punching method for corrugated cardboard sheets, which can omit a step of removing remaining whiskers.

  2. Description of the Related Art As a packaging box used for storing or moving articles, a cardboard box manufactured by assembling a punched blank, which is a cardboard product, has conventionally been conventionally used. The top cover and the bottom plate of the cardboard box are formed by forming ruled lines or slits in a part of the blank to be cut and folding the cut-off portions so as to overlap each other.

Here, when the blank is cut using the cutting blade, as shown in FIGS. 11 and 12 (partially crushed for clarity), a thin beard is applied to the cut end face. There is a problem that the cutting waste G in a shape remains. More specifically, a punched blank that is cut by a cutting tool usually has a structure in which a corrugated center is arranged between a front liner and a back liner, and the center has a step top. The intermediate portion between the peak and the valley portion of the core is crushed into a substantially Z-shape by the pressing between the cutting blade and the receiving blade during the cutting because the two liners are bonded to each other through the liner. In some cases, the cutting line is not parallel to the corrugated direction of the core, but may cross a plurality of peaks and valleys diagonally. Therefore, the core portion becomes fine cutting chips, which are connected to the cut end face of the corrugated cardboard and hang down like a whisker and remain. The fine cuttings can range in length from over a few mm to 300 mm and have a width of 1-2 mm.
Such a whisker-like chip is a foreign substance, and in particular, for a cardboard box for storing food therein, its removal is indispensable for sanitary management, and in a state where a plurality of punched blanks before the box assembly are stacked. Then, the whisker-like chips exposed on the outer peripheral surface of the laminate were removed manually or by a suction machine, but this operation was troublesome. In particular, the punched blanks are usually bundled in a stacked state and delivered, but the whiskers exposed on the outer peripheral surface of the stacked body can be removed in a stacked state, Since the cut end face constituting the slit is located inside the punched blank, it is difficult to remove the cut end face in a stacked state.
There has been proposed a foreign matter removal technique that eliminates such operations.

For example, Patent Document 1 relates to a paper dust removing device, and more specifically, a paper dust removing device that removes paper dust attached to a product sheet punched from corrugated paperboard, paperboard, or the like. With the two sides facing each other out of the four sides of the product sheet as one set in the form of a stacked batch, there are two stages for brushing the two sets separately, and one stage conveys the product sheet with the end faces of the product sheet aligned. The other stage is brushed on two opposing sides other than the supporting portion by lifting it upward from the means, and the other stage brushes the remaining two opposing sides while the product sheet is aligned and constrained on the conveying means.
According to such a paper dust removing device, it is possible to provide a compact and inexpensive paper dust removing device capable of efficiently removing paper dust.

For example, Patent Document 2 relates to an apparatus for removing paper dust from a corrugated board, and more specifically, a supply conveyor for transporting a block in which a large number of corrugated boards are stacked in a horizontal stacking posture, and a paper conveyor capable of appearing and retracting on the surface of the supply conveyor. A stopper for the block that has been moved, a brush roll for removing front paper dust that is rotatably supported on the front side of the block stopped by the stopper in the transport direction and that is in contact with the front of the block while rotating, and a front paper dust removal. The first belt conveyor that moves the brushed blocks in the conveying direction by the brush rolls, and the block that is in a position that does not interfere with the first belt conveyor from the lower side of the block that is in the horizontal stacking position, and transports the blocks up. A reversing conveyor with a number of blades set up in the circumferential direction, and the reversing conveyor is conveyed in a vertical position between the conveying blades during the horizontal transfer process. Paper dust removing brush roll that rotates and abuts on the upper surface and both side surfaces of the block, the air ejection nozzles provided corresponding to these paper dust removing brush rolls, and the outer peripheral surface of the block conveyed in a vertical position Germicidal lamp, a second belt conveyor that receives a block that is supported by the transport-side blades of the reversing transport conveyor and that has a horizontal horizontal stacking position again at the end, and is unloaded from the second belt conveyor. The conveyor comprises a discharge conveyor for receiving the blocks to be processed, and a casing provided with an air suction device therein, which covers the whole from the stopper position of the supply conveyor to the discharge conveyor.

Therefore, according to the paper dust removing apparatus for a corrugated board, the corrugated board is stopped by the first stopper, and after the front surface is brushed by the brush roll at that position, the entire peripheral surface is brushed and the paper dust is removed in the closed chamber. The removed and removed paper dust is sucked by the airflow flowing from the air jets in the closed chamber to the suction device, so that the paper dust does not scatter around and the environment is protected.

For example, Patent Document 3 relates to a cutting blade, more specifically, a cutting blade that cuts a sheet material while rotating, and is arranged on a fan-shaped blade main body and an outer peripheral portion of the blade main body. A cutting blade portion, wherein the cutting blade portion has an arc-shaped first cutting blade formed along the outer peripheral portion of the blade main body, and a second cutting blade in a region excluding both end portions of the arc-shaped first cutting blade. A plurality of second cutting blades arranged at predetermined intervals along one cutting blade to cut whisker-like cuttings remaining on the cut end surface of the sheet material.
The processing blade for cutting is configured to include a plurality of second cutting blades provided to protrude outside the blade main body from the first cutting blade, which is a blade for cutting a sheet material to form a slit. When the second cutting blade exits from the lower side of the sheet material to the upper side, the second cutting blade enters between the thin whisker-like cutting chips formed on the cutting end face and the cutting end face and cuts the cutting chips. Can be cut off. This prevents whisker-like debris from remaining on the sheet material after the slit processing, and makes it possible to make the cut surface formed when cutting the sheet material such as a punched blank into a clean state. it can.

For example, Patent Document 4 relates to a punching die, and more specifically, a thin body is punched by a punching blade having a closed contour, and a punched product inside the contour is communicated from the inside of the contour to a lower portion of the base. In a punching die for discharging through a discharge space, an auxiliary blade for dividing a contour dividing the contour into at least two parts is provided inside the closed contour, so that the size of the punching waste is large. However, it is possible to smoothly discharge the punched waste.

However, such a conventional foreign matter removal technique has the following technical problems.
That is, although it is possible to mechanically remove a whisker-like swarf as compared with the case of manually removing the whisker-like swarf, a mechanical equipment for separately removing a whisker-like swarf is separately provided. In addition, in Patent Document 1 and Patent Document 2, since the step of removing whisker-like cuttings is performed once after punching a blank, the efficiency of whisker-like cuttings is increased. Removal is difficult.
In this regard, in Patent Document 3, the whisker-like cuttings are cut at the same time as the punching blank is punched out, but the whisker-like cuttings generated in the elongated slit formed inward from the outer peripheral surface of the punching blank are cut. However, it does not cut whisker-like chips generated on the outer peripheral cut end face of the blank.
Further, in Patent Document 4, as shown in FIG. 5, an object to be punched is a thin plate having an opening, and a planar cutting waste corresponding to the opening is divided into two from a discharge opening provided in a punching die corresponding to the opening. It merely provides an auxiliary blade for dividing the waste so as to straddle the discharge opening, and does not cut the whiskers generated at the center of the cardboard.

JP 2009-119359 A JP-A-2003-164812 Patent No. 6010789 JP-A-2011-56610

  In view of the above technical problems, an object of the present invention is to simultaneously cut and separate mustache-shaped chips from the core remaining on the cut end surface of the punched blank when punching a punched blank as a cardboard product from a corrugated cardboard sheet. Accordingly, an object of the present invention is to provide a corrugated cardboard sheet blanking die and a corrugated cardboard sheet punching method that can separately omit the step of removing the remaining whiskers.

In order to achieve the above object, a punching die for a corrugated cardboard sheet of the present invention is:
Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the corrugated cardboard sheet so that the punched blank can be punched. Protruding from the one surface over a first predetermined height,
Further, at least one side of the frame, from the one side to the inner side of the frame, so as to be able to cut a whisker-like chip that may be generated at the center of the cut end face of the blank blank formed by the blank punching blade. A plurality of whisker-like chip cutting blades extending toward the one side at predetermined intervals in the direction in which the one side extends, and each whisker-like chip cutting blade cooperates with the blank punching blade to form a blank. A dedicated blade for cutting a whisker-like chip without punching, provided separately from the blank punching blade, and, depending on the thickness of the corrugated cardboard sheet, from one surface to a second predetermined height. It is configured to protrude.
In addition, it is preferable that each beard-shaped chip cutting blade extends from the side in the extending direction of the blank punching blade toward the inside of the frame.

In order to achieve the above object, a punching die for a corrugated cardboard sheet of the present invention is:
Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the corrugated cardboard sheet so that the punched blank can be punched. Protruding from the one surface over a first predetermined height,
Further, at least one side of the frame in a direction in which the blank punching blade extends in such a manner as to be able to cut a whisker-like chip that may be generated at the center of the cut end face of the punched blank formed by the blank punching blade. A plurality of whisker-like chip cutting blades extending inward from the frame-shaped portion at predetermined intervals in a direction in which the one side extends, and each whisker-like chip cutting blade has a thickness of the corrugated cardboard sheet. , And protrudes from the one surface over a second predetermined height.
Further, the blade of each beard-shaped chip cutting blade, the bead-shaped chip cutting blades adjacent to each other in the direction in which the one side extends is not connected to each other, and the inner end portion is preferably a free end. .

Further, it is preferable that the second predetermined height of each beard-shaped chip cutting blade is set separately from the first predetermined height of the blank punching blade.
In addition, the blade of each beard-shaped chip cutting blade is such that the bevel-shaped chip cutting blades adjacent in the direction in which the one side extends are not connected to each other, and the inward end portion is a free end. Good.

In order to achieve the above object, a punching die for a corrugated cardboard sheet of the present invention is:
Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the cardboard sheet so that the punched blank can be punched. Protruding from the one surface over a first predetermined height,
Further, at least one side of the frame, from the one side to the inner side of the frame, so as to be able to cut a whisker-like chip that may be generated at the center of the cut end face of the blank blank formed by the blank punching blade. Are provided at predetermined intervals in the direction in which the one side extends, and each of the blades of the mustache-shaped chip cutting blade has a whisker-like shape adjacent in the direction in which the one side extends. The chip cutting blades are not connected to each other, the inner end portion is a free end, and projects from the one surface over a second predetermined height according to the thickness of the corrugated cardboard sheet. I have.

In order to achieve the above object, a punching die for a corrugated cardboard sheet of the present invention is:
Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the cardboard sheet so that the punched blank can be punched. Protruding from the one surface over a first predetermined height,
Further, at least one side of the frame, from the one side to the inner side of the frame, so as to be able to cut a whisker-like chip that may be generated at the center of the cut end face of the blank blank formed by the blank punching blade. A plurality of beard-shaped chip cutting blades extending toward the side at predetermined intervals in the direction in which the one side extends, and the blade of each beard-shaped chip cutting blade constitutes a part of the frame shape. A dedicated blade for cutting mustache-shaped chips, provided separately from the blank punching blade, and protruding from the one surface over a second predetermined height according to the thickness of the corrugated cardboard sheet. And

In order to achieve the above object, a punching die for a corrugated cardboard sheet of the present invention is:
Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the cardboard sheet so that the punched blank can be punched. Protruding from the one surface over a first predetermined height,
Further, at least one side of the frame, from the one side to the inner side of the frame, so as to be able to cut a whisker-like chip that may be generated at the center of the cut end face of the blank blank formed by the blank punching blade. A plurality of whisker-like cutting blades extending toward the side at predetermined intervals in the direction in which the one side extends, and each of the whisker-like cutting blades has a whisker-like chip that can be generated at the center of the cutting end face. , The position on the one side and / or the predetermined interval are individually set, and project from the one surface over a second predetermined height in accordance with the thickness of the corrugated cardboard sheet.

In order to achieve the above object, a punching die for a corrugated cardboard sheet of the present invention is:
Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, a plurality of blades for blank punching are provided, and are arranged in a frame shape corresponding to the outer peripheral edge of the punched blank as a whole,
On at least one side of the frame, has a linear blank punching cutter,
The blade of the linear blank punching blade extends in the extending direction of the one side so that the blank can be separated by a plurality of blank punching blades,
Furthermore, in order to be able to cut the whisker-like chips that can be generated at the center of the cut end face of the blank punch formed by the blank punching blade, the straight blank punching blade, in the frame-shaped inward. A whisker-like chip cutting blade extending in a direction branching from a direction in which the blade of the linear blank punching blade extends, and the whisker-like chip cutting blade cooperates with the blank punching blade. A dedicated blade that cuts whisker-like chips without working and punching blanks, and is provided separately from the linear blank punching blade, and according to the thickness of the corrugated cardboard sheet, from one surface. It is configured to protrude over a predetermined height.

In order to achieve the above object, a punching method for a corrugated cardboard sheet of the present invention,
On one surface, a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank is provided, and at least one side of the frame is directed inward from a side in the extending direction of the blank punching blade. Preparing a corrugated sheet cutting die provided with a beard-shaped chip cutting blade extending to
Positioning the corrugated cardboard sheet so that at least one side of the frame is oriented in a direction intersecting with the extending direction of the corrugated portion of the core of the corrugated cardboard sheet,
Pressing a blank cutting blade and a whisker-like chip cutting blade of a corrugated sheet blanking die against a corrugated cardboard sheet to punch out a punched blank from the corrugated cardboard sheet, and at the time of punching, only the whisker-like chip cutting blade And a step of cutting a whisker-like chip generated on a cutting end face by the blank cutting blade and separating the whisker from the blank to be punched.

Also, a step of preparing a plurality of whisker-like chips having different blade lengths and / or predetermined heights, and a step of preparing a plurality of whisker-like chips according to a flute type of a corrugated cardboard sheet. And a step of selecting a beard-shaped chip cutting blade to be used for cutting.
Further, in correspondence with the plurality of blanks to be blanked, a blank cutting tool extending in parallel with one of the opposite sides of the frame and extending between the other opposite sides, and one of the frames in parallel with the other opposite side of the frame. By further having a blank punching blade extending between opposing sides, a plurality of rectangular frames are formed, and the beard-shaped chip cutting blades are arranged on one and / or the other opposing side of each rectangular frame. To do,
A single pressing of the corrugated sheet for the corrugated sheet for the corrugated cardboard sheet simultaneously punches a plurality of punched blanks, and in each punched blank, cuts a whisker-like chip generated at the time of punching and separates the blank from the punched blank. Good to have.

In order to achieve the above object, a method for manufacturing a punched blank of the present invention includes:
On one surface, a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank is provided, and at least one side of the frame is directed inward from a side in the extending direction of the blank punching blade. Preparing a corrugated sheet cutting die provided with a beard-shaped chip cutting blade extending to
Positioning the corrugated cardboard sheet so that at least one side of the frame is oriented in a direction intersecting with the extending direction of the corrugated portion of the core of the corrugated cardboard sheet,
Pressing a blank cutting blade and a whisker-like chip cutting blade of a corrugated sheet blanking die against a corrugated cardboard sheet and punching a punched blank from the corrugated cardboard sheet, and when punching, only the whisker-like chip cutting blade By cutting the whisker-like chips generated on the cutting end face by the blade for blank punching, separating the punched blanks from the punched blanks, and removing the punched blanks from which the whisker-like chips have been cut, from the corrugated cardboard sheet,
Having a configuration.

A first embodiment of a punching system having a die for corrugated cardboard sheets according to the present invention will be described in detail below with reference to the drawings.
As shown in FIG. 1, a punching system 10 includes a sheet feeding device (not shown) that feeds a cardboard sheet S, and a punching device that is arranged vertically above and below a cardboard sheet S fed by the sheet feeding device. 14.
In the following, the corrugated cardboard to be punched by the punching system 10 is referred to as a corrugated cardboard sheet S, and the corrugated cardboard that is a product punched by the punching system 10 is referred to as a punched blank SS. , The direction X as shown in FIG.
The paper feeding device is, for example, a conventionally known device that positions the corrugated cardboard sheet S on the upper surface of the lower plate 13, and is provided with a plurality of whisker-like cutting blades 26 of the corrugated cardboard sheet punching die 16 described later. The cardboard sheet S is positioned so that the direction orthogonal to the direction X in which the waveform of the core N of the corrugated cardboard sheet S extends coincides with the direction.
The punching device 14 has a lower plate 13 made of a steel plate, and an upper plate 11 disposed opposite to the upper side of the lower plate 13. This is a known device that reciprocates the corrugated cardboard sheet S positioned on the upper surface of the lower plate 13 in the fixed state between the holding position P1 and the extracting position P2 in the vertical direction. The lower plate 13 and the upper plate 11 are relatively movable in the vertical direction. In the embodiment, the upper plate 11 is fixed and the lower plate 13 is movable up and down. However, the upper plate 11 may be movable up and down and the lower plate 13 may be fixed, or both the lower plate 13 and the upper plate 11 may be fixed. May be movable up and down so as to move up and down in opposite directions.
With such a configuration, by moving the cardboard sheet S positioned on the upper surface of the lower plate 13 by the sheet feeding device from the holding position P1 to the punching position P2, the blade for blank punching (described later) allows the cardboard sheet S to be removed. The front surface S1, the core N, and the back surface S2 penetrate in the thickness direction of the sheet.

The corrugated product (punched blank SS) has a corrugated core N interposed between the front surface S1 liner, the back surface S2 liner, and both liners, and has an adhesive on the corrugated step top. This is a double-sided punched blank SS that is formed by being applied and then bonded to both liners.
For cardboard, JIS Z 1516 defines the type of flute and the number of steps. The number of steps is 34 ± 2/30 cm for the A flute, the number of steps = 50 ± 2/30 cm for the B flute, and the number of steps = 40 ± 2/30 cm for the C flute. Although the corrugated height of the corrugated cardboard is not specified in JIS, it is a characteristic that directly affects the thickness of the punched blank SS, and the user who purchased the corrugated cardboard packs the contents with an automatic box making machine. When sealing, it is necessary to set the thickness gap etc. of the automatic box making machine according to the sheet thickness, etc., which is a very important characteristic. In actual transactions, the step height of the A flute = 4.5 ４4.8 mm, B-flute step height = 2. 5-2. Produced and traded in 8mm.
The cardboard product (punched blank SS) to which the present invention can be applied has a blank punching blade 20 and a whisker-like chip cutting blade 26 to be described later in which the height from one surface 22 of the cardboard sheet punching die 16 is appropriately adjusted. Any flute type double-sided punched blank SS may be used, or a single-sided punched blank SS provided with a liner only on one side. Similarly, the core N may be a single flute or a double flute as long as the height of the blank cutting blade 20 and the whisker-like chip cutting blade 26 described later is appropriately selected.

In the following, a punching die 16 for a corrugated cardboard sheet, which is a feature of the present invention, and a method of punching a corrugated cardboard product (punching blank SS) by using such a punching die 16 for a corrugated cardboard sheet will be described. , Will be described in detail.

As shown in FIGS. 2 and 6, the punch 16 for a corrugated cardboard sheet has, for example, a rectangle formed on one surface 22 by one set of opposed sides 44A and 44B and another set of opposed sides 46A and 46B. Is a wooden flat plate formed by laser processing, and a punching blade is press-fitted and fixed in the frame-shaped groove 25, and is used for punching a corrugated cardboard product (punched blank SS). The whole rectangle is divided into eight rectangles (F1 to F8) so that eight corrugated products (punched blanks SS) are simultaneously punched out by one punching, and each of the sides constituting the eight rectangles is cut out. Has a blade 20 for blank punching.
More specifically, one surface 22 is provided with a blank punching blade 20 arranged in a frame shape corresponding to the outer peripheral edge 18 of the corrugated product (punched blank SS), and the blade of the blank punching blade 20 is According to the thickness of the corrugated product (punched blank SS), it protrudes from one surface 22 over a predetermined height h so that the corrugated product (punched blank SS) can be punched.
The blank cutting blade 20 has a V-shaped cross section having a pointed tip, and is formed of, for example, a metal material such as cast iron, stainless steel, iron, or tool steel.
At the corners of the frame, L-shaped corner blades are provided, and on each side of the frame, a thin plate-shaped linear blade is arranged, or a plurality of thin plate-shaped linear blades are arranged, as a whole It may be configured as a frame-shaped blank punching blade 20, or may be configured as a blank punching blade 20 by forming a single thin plate-shaped straight blade into a frame shape.

Further, each of the pair of opposing sides 44A and 44B is provided with a whisker-like cutting blade 26 extending from the opposing side 44 toward the inside of the frame by a press-fitting method. The blade of the blade 26 has a V-shaped cross-section having a pointed tip similar to the blade 20 for blank punching, and has a predetermined height h from one surface 22 depending on the thickness of the corrugated product (punched blank SS). Protrude across. The beard-shaped chip cutting blade 26 has a predetermined height (so-called full-cut type) capable of cutting both the front surface S1 liner and the rear surface S2 liner together with the core N. The beard-shaped chip cutting blade 26 may have a linear shape or a wavy shape in plan view, depending on the requirement of the punched blank SS.
The beard-shaped chip cutting blade 26 is made of metal like the blank punching blade 20, and is provided so as to be orthogonal to each of the pair of opposing sides 44A and 44B. The angle with respect to one set of opposing sides is preferably orthogonal, but is not limited thereto, and it is possible to cut a whisker-like chip G derived from the core N that can be generated on a cutting end face by the blank cutting blade 20. As long as the direction is along a pair of opposing sides, any angle may be used.
As shown in FIG. 1, the beard-shaped chip cutting blade 26 has an end surface 90 having a shape that matches one inclined surface of the V-shaped cross section of the blank punching blade 20. It extends continuously without interruption.
In this case, it is not necessary to extend inward from the pair of opposing sides 44A, 44B without interruption, as long as the whisker-like chips G generated on the cut end face of the corrugated cardboard product (punched blank SS) can be cut. As appropriate, a space may be provided between the pair of opposed sides 44A and 44B. That is, as long as the whisker-like cutting tool G is capable of cutting the whisker-like swarf G when the whisker-like swarf cutting blade 26 is punched, for example, in the case where the blank piercing swarf 20 has a waveform in a plan view, one set of opposing sides 44A , 44B, there may be a gap between the blade of the blank cutting blade 20 and the whisker-like cutting blade 26. When the installation direction of the whisker-like chip cutting blade 26 is along the cutting end face, the whisker-like chip G cannot be cut by the whisker-like chip cutting blade 26, but the blade of the blank punching blade 20 and the The gap between the whisker-like cutting blade 26 and the whisker-like swarf G derived from the core N, which can be generated at the cutting end face, can be supposedly generated from the viewpoint of the length of the whisker. Good.

A plurality of the whisker-like cutting blades 26 are provided at predetermined intervals from each other (three in each of a pair of opposed sides 44A and 44B in the drawing).
The predetermined interval may be determined from the viewpoint that the mustache-like chips G, which are assumed to be generated at the time of punching, can be separated from the corrugated cardboard product (punched blank SS) by cutting at the same time. Depending on the position of the corrugated paperboard die (punched blank SS) with respect to the corrugated corrugated product (punched blank SS), the shavings G derived from the core N are formed on the cut end face of the outer peripheral edge constituting the outer shape of the corrugated cardboard product (punched blank SS). The point of generation or not, and even if a whisker-like chip G is generated on a certain cut end face, the intermediate portion between the peak portion and the valley portion of the core N is crushed in a substantially Z shape. In this state, the cutting line is not parallel to the waveform direction of the core N and may cross a plurality of peaks and valleys at an angle. Therefore, in consideration of such a situation, it is preferable to determine the length extending from the pair of opposing sides 44A, 44B corresponding to the predetermined interval and the blade length l toward the inside of the frame.
For example, the predetermined interval is 1/4 to 1/2 of the length of the pair of opposed sides 44A and 44B, and specifically, is preferably 10 mm to 300 mm.
The length extending from the pair of opposing sides 44A, 44B toward the inside of the frame is preferably equal to or less than half a wavelength of the waveform of the core N, and for example, is preferably 1 mm to 10 mm.

The number and arrangement of the whisker-like cutting blades 26 with respect to each of the opposing sides 44A, 44B do not need to be the same. For example, one of the opposing sides 44A, 44B is used for cutting a plurality of whisker-like chips. While the blades 26 are installed at equal intervals, the other of the opposing sides 44A, 44B does not have to be provided with a plurality of whisker-like cutting blades 26 at equal intervals, or one of the opposing sides 44A, 44B. In the meanwhile, a single whisker-like cutting blade 26 may be provided at the center, while the other of the opposing sides 44A and 44B may be provided with a plurality of whisker-like cutting blades 26 at equal intervals.

As shown in FIG. 3, the blade 26 for beard-like chip cutting has a thin plate-shaped base portion 38, and a blade main body portion having a longer blade length 1 than a blade thickness w is provided on an elongated upper surface 32 of the thin plate-shaped base portion 38. The blade main body portion 34 may be provided with a reinforcing portion 40 whose width in the extending direction of the elongated upper surface 32 is tapered from the elongated upper surface 32 toward the blade main body portion 34. For example, the elongated upper surface 32 of the thin plate-shaped base 38 may be formed in a stepped shape, and the blade main body 34 may be provided on the top surface.
As shown in FIG. 4, as a modification, the blade 26 for cutting mustache-like chips includes a block-shaped base 30 having a rectangular bottom surface 28, and a blade body 34 projecting upward from an upper surface 32 of the block-shaped base 30. The blade main body 34 has an elongated thin plate shape having a blade length 1 larger than the blade thickness w, and the one surface 22 is provided with an opening 36 into which the rectangular bottom surface 28 can be fitted or fixed. Can be This makes it possible to firmly fix the whisker-like chip cutting blade 26 having a smaller pressure receiving area at the time of punching to the one surface 22 of the cardboard sheet punching die 16 than the blank punching blade 20. .
As shown in FIG. 5, as another modified example, the beard-shaped chip cutting blade 26 includes a frusto-conical block-shaped base 37 whose diameter is reduced toward the front end, and an upper part of the cone-shaped block-shaped base 37. The blade main body 34 has an elongated thin plate shape whose blade length 1 is larger than the blade thickness w, and has a frusto-conical block-shaped base 37 on one surface 22. May be provided with a circular opening in which the circular bottom surface 39 can be fitted and fixed or press-fitted and fixed.
Note that the corrugated cardboard sheet S is used for the corrugated cardboard sheet S such that a pair of opposing sides 44A and 44B of the frame of the corrugated cardboard sheet cutting die 16 are perpendicular to the direction in which the corrugated portion of the core N of the corrugated cardboard sheet S extends. It is positioned with respect to the punching die 16. Incidentally, the corrugated shape of the core N is not exposed in a direction orthogonal to the extending direction of the corrugated portion of the core N of the corrugated cardboard sheet S. Incidentally, the block-shaped base 30 and the truncated-cone-shaped block-shaped base 37 may be solid or hollow as long as the blade body 34 is protected during punching.
In this case, as shown in FIG. 7, the punching angle に 対 す る with respect to the extending direction of the waveform of the core N does not need to be 0 °, and a mustache derived from the core N which may be generated on the cut end face by the blank cutting blade 20. As long as the cutting chips G can be cut, they may be inclined. For example, 0 ° to 10 ° is an allowable range.

In addition, corresponding to a plurality (eight) of corrugated products (punched blanks SS), the blank cutting blade 20 extending in parallel with the pair of opposed sides 44A and 44B of the frame and extending between the other opposed sides 46A and 46B. And a plurality of (eight) rectangular frames are formed by further having a blank punching blade 20 extending between the pair of opposed sides 44A, 44B in parallel with the other opposed sides 46A, 46B of the frame. Then, the beard-shaped chip cutting blades 26 are arranged on both of the one opposing sides of each rectangular frame.

In addition, an appropriate number of planar elastic bodies (not shown), for example, sponges, are arranged at appropriate positions on one surface 22, and after the punching of the cardboard product (punched blank SS) by the punching device 14. When the lower plate 10 is moved downward from the punching position to the holding position, the blank cutting blade 20 and / or the whisker-like chip cutting blade 26 do not remain in the corrugated product (punched blank SS). In order to smoothly separate the corrugated product (punched blank SS) from the corrugated product (punched blank SS), the corrugated product (punched blank SS) is pressed against the corrugated cardboard product (punched blank SS). A repulsive force that separates from the blank SS) is generated.
Also, on one surface 22, a punch or a convex body (shown in the drawing) for applying a ruled line to the corrugated product (punched blank SS) is used for folding the corrugated product (punched blank SS) into a corrugated cardboard box. ) Are provided at appropriate positions in an appropriate number.

The operation of the punching system 10 having the above-described configuration will be described below as a method of punching the punching blank SS using such a punching system.
First, on one surface 22 of the cardboard sheet punching die 16, a blank punching blade 20 arranged in a frame shape corresponding to the outer peripheral edge 18 of a corrugated cardboard product (punched blank SS) is provided, and a pair of opposing sides 44A are provided. , 44B, a beard-shaped chip cutting blade 26 extending inwardly of the frame from each of a pair of opposing sides 44A, 44B is provided, for example, press-fitted into a frame-shaped groove 25 on one surface 22.
Next, the cardboard sheet S is formed into a cardboard sheet punching die 16 by a paper feeding device such that the pair of opposing sides 44A and 44B are oriented in a direction orthogonal to the extending direction of the corrugated portion of the core N of the cardboard sheet S. Positioning with respect to Note that the punching angle に 対 す る with respect to the extending direction of the waveform of the core N is not the direction in the orthogonal direction as long as the whiskers G generated on the cut end face of at least one side of the corrugated product (punched blank SS) can be cut. And it is preferably in the range of 0 ° to 10 °.
Thereby, when the corrugated product (punched blank SS) is punched out, even if the whisker-like chips G are generated at the center N of the punching cut end face by the whisker-like chip cutting blade 26, the whisker-like cutting is performed simultaneously with the punching. It is possible to cut off the waste G and thereby separate and remove it from the corrugated product to be punched (punched blank SS).
Next, the corrugated product (punched blank SS) is punched out of the corrugated cardboard sheet S by pressing the blank cutting blade 20 and the whisker-like chip cutting blade 26 of the corrugated cardboard sheet punching die 16 against the corrugated cardboard sheet S, The whisker-like chips G generated at the time of punching are cut and separated and removed from a cardboard product (punched blank SS).
As shown in FIG. 8, the outer peripheral edge 18 of the cardboard product (punched blank SS), that is, a pair of opposing sides 52A and 52B corresponding to a pair of opposing sides 44A and 44B of the frame, has a whisker-like chip cut. While the notch C is formed by the cutting blade 26, the notch C is not formed in another pair of opposing sides 54A, 54B corresponding to one pair of opposing sides 46A, 46B of the frame.

In this case, a step of preparing a plurality of whisker-like chip cutting blades 26 having different blade lengths l and / or predetermined heights h, and a type of corrugated cardboard sheet S (double-sided corrugated cardboard, single-sided corrugated cardboard) or a flute type (A, B, C type, and single flute or double flute), and a step of selecting a whisker-like chip cutting blade 26 used for whisker-like chip cutting from a plurality of whisker-like chip cutting blades 26. May be.
For example, when a corrugated product (punched blank SS) having the same outer shape is punched, the corrugated cardboard product (punched blank SS) is one-sided even if the same configuration is used as the blank punching blade 20 arranged in a frame shape. In the case where the flute type is different from the punched blank SS, the double-sided punched blank SS, or the same type of punched blank SS, the type and / or arrangement of the beard-shaped chip cutting blade 26 is selected accordingly. Good to do.

In this case, since a plurality of (eight in the present embodiment) corrugated products (punched blanks SS) are punched out by a single punch, a dedicated corrugated cardboard sheet die 16 is used. Corresponding to the blanking blank SS), the blank cutting blade 20 extending between the other opposing sides 46A, 46B in parallel with the one opposing sides 44A, 44B of the frame, and the other opposing sides 46A, 46B of the frame. A plurality of rectangular frames are formed by further including a blank punching blade 20 extending in parallel between one of the opposing sides 44A and 44B, and a pair of opposing sides of each rectangular frame is provided with a beard. A plurality of corrugated products (punched blanks SS) are arranged by a single press of the corrugated sheet cutting die 16 against the corrugated cardboard sheet S. At the same time, at the outer periphery of each corrugated product (punched blank SS) and the elongated slit 42, the whisker chips G derived from the core N generated at the time of punching are cut and separated from the corrugated product (punched blank SS). It becomes possible.
Therefore, it is normal to deliver a plurality of corrugated products (punched blanks SS) in a stacked state and bundle them. However, if the peripheral side surfaces of the laminated plurality of corrugated products (punched blanks SS) are stacked, the whisker-like chips G are laminated. Can be removed, but it is difficult to remove the whisker-like chips G generated in the elongated slits 42 extending inside the corrugated cardboard product (punched blank SS) after lamination. It is possible to omit the operation of separately removing the whisker-like chips G without generating the same with the blank SS).
In addition, the punched blank SS may be a product as a cardboard box by assembling it, for example, in the case of an insole stored in a cardboard box, the punched blank SS itself becomes a product as it is, In the sense, regarding the punching method for corrugated cardboard sheets described above, furthermore, by taking out the punched blank from the corrugated cardboard sheet, it is possible to legally evaluate the method as a method of manufacturing a punched blank, and the result of manufacturing by the method of manufacturing a punched blank. It is understood that the effect of the method for manufacturing a punched blank extends to the punched blank as an object.

According to the corrugated cardboard sheet punching die 16 having the above-described configuration, by pressing the one surface 22 of the corrugated cardboard sheet punching die 16 against the corrugated cardboard sheet S, the blank punching blade 20 becomes the main body of the corrugated cardboard sheet S. The blank punching machine arranged in a frame shape by penetrating the core N and the back surface S2 or the front surface S1 in the thickness direction of the cardboard sheet S from the surface S1 or the back surface S2 to the inside of the cardboard sheet S. It is possible to punch a corrugated product (punched blank SS) having an outer peripheral edge 18 corresponding to the frame shape of the blade 20.
When the blank cutting tool 20 cuts out the core N while crushing the waveform of the core N into a substantially Z shape, the intermediate portion between the peak portion and the valley portion of the core N is crushed in a substantially Z shape. Since the cutting line is not parallel to the waveform direction of the core N and may cross a plurality of peaks and valleys diagonally, the cutting end face of the core N Where the whisker-like chips G are generated, since the whisker-like swarf cutting blades 26 are provided so as to extend from at least one side of the frame to the inside of the framing, the whisker-like swarf cutting blades 26 are made of cardboard. The beard-shaped chips G are simultaneously cut from the front surface S1 or the back surface S2 of the sheet S to the inside of the corrugated cardboard sheet S when the corrugated cardboard product (punched blank SS) is punched, and the corrugated cardboard product (punched blank) is punched out. SS) It is possible.
Therefore, it is possible to omit the step of separately removing the remaining whisker-like chips G after punching the corrugated product (punched blank SS).

Hereinafter, a second embodiment of the present invention will be described with reference to FIG. 9 (the horizontal direction in the drawing is the direction in which the waveform of the center core extends). In the following description, the same components as those in the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, the features of the present embodiment will be described in detail.
The present embodiment is common to the first embodiment in that a plurality of whisker-like chip cutting blades 26 are provided at predetermined intervals on each of a pair of opposing sides 44A and 44B of the frame of the corrugated paperboard punching die 16. However, in the first embodiment, a plurality of substantially rectangular punched blanks SS are punched out simultaneously by one punching. In the present embodiment, however, an elongated edge 18 is provided on the outer peripheral edge 18 of the corrugated product (punched blank SS). The slit 42 is provided, and the blade 26 for beard-like chip cutting is provided also on the side of the frame constituting the elongated slit 42.
In FIG. 9A, an elongated slit 42 is provided in each of a pair of opposing sides 52A, 52B of a corrugated product (punched blank SS). As shown in FIG. The beard-shaped chip cutting blade 26 is provided not on a pair of opposed long sides 56A and 56B of the frame constituting each elongated slit 42 but on a bottom 58 connecting the pair of long sides 56A and 56B.
More specifically, a pair of opposed sides 52A, 52B of a corrugated cardboard product (punched blank SS) are each provided with an elongated slit 42 extending inward, and correspond to the opposed long sides 48A, 48B of the elongated slit 42. A blank cutting tool 20 is provided on each of the corresponding sides 56A and 56B of the corrugated sheet punching die 16 and on the corresponding bottom side 58 of the corrugated cardboard sheet punching die 16 corresponding to the bottom 50 of the elongated slit 42, For example, in each of a pair of opposing sides 44A and 44B, an L-shaped corner type blank cutting blade 20 is provided at a boundary portion with one side 56A and 56B, and the blade 20 is arranged in a direction orthogonal to the base 58. A beard-shaped chip cutting blade 26 extending inward of the frame is provided.

More specifically, an elongated slit 42 is provided from one side 54A, 54B of the frame corresponding to the outer peripheral edge of the corrugated cardboard product (punched blank SS), and a bead-shaped chip is cut at a bottom 58 corresponding to the bottom 50 of the elongated slit 42. Cutting blade 26 is provided. As a result, a cut C is also formed in the bottom 50 connecting the pair of opposed sides 48A and 48B constituting the elongated slit 42. In this case, the beard-shaped chip cutting blade 26 provided on the base 58 corresponding to the bottom 50 of the elongated slit 42 is provided with a set of opposed sides 52A and 52B corresponding to a set of opposed sides 52A and 52B of the cardboard product (punched blank SS). It is not necessary to be the same as the whisker-like cutting blade 26 provided on each of the sides 44A and 44B. For example, the whisker-like cutting blade provided on each of a pair of opposite sides 44A and 44B of a corrugated cardboard product (punched blank SS). 26 may be the above-described block-type base type, while the base 58 may be the above-mentioned thin-plate-type base type.
Accordingly, when a plurality of corrugated cardboard products (punched blanks SS) are stacked and bundled with the band B and delivered as a product, the side surface constituted by the pair of opposing sides 52A and 52B of each corrugated cardboard product (punched blank SS) Since the side surface constituted by the base 50 corresponding to the bottom of the elongated slit 42, which is exposed to the outside, is not exposed to the outside, the corrugated product (punched blank SS) is simultaneously punched out of the elongated slit 42. The point at which the whisker-like chips G generated on the bottom 50 (cut end face) corresponding to the bottom are cut and separated is on the side surface constituted by each set of opposed sides 52A and 52B of each corrugated product (punched blank SS). This is extremely effective as compared with the case where the generated shavings G are cut and separated.
On the other hand, in FIG. 9C, a pair of opposing sides 56A and 56B of the frame constituting the elongated slit 42 are also provided with the whisker-like cutting blades 26. In more detail, the corresponding side 56A, 56B of the corrugated cardboard sheet punching die 16 corresponding to the opposed long side 48A, 48B of the elongated slit 42 is inserted into the frame in a direction orthogonal to the side 56A, 56B. A whisker-like chip cutting blade 26 extending in the direction is further provided. Thereby, the notch C is also formed in each of the pair of opposing sides 48A and 48B constituting the elongated slit 42.

Hereinafter, a third embodiment of the present invention will be described with reference to FIG. In the following description, the same components as those in the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, the features of the present embodiment will be described in detail.

The feature of this embodiment lies in the punching mode of the corrugated cardboard sheet S. In the first embodiment and the second embodiment, the corrugated cardboard sheet S is positioned and stopped, and the corrugated cardboard sheet S is moved up and down by moving the punching die up and down. In contrast to the so-called flat die cutter system in which punching is performed, in the present embodiment, the so-called rotary die cutter system in which the corrugated cardboard sheet S is punched by moving and passing the corrugated cardboard sheet S between vertically rotating shafts that are vertically spaced. In the first and second embodiments, the corrugated sheet punching die 16 provided on one outer peripheral surface of the vertical rotation shaft is flat, In the present embodiment, the shape is a curved surface having an arc-shaped cross section.
As shown in FIG. 10, the rotary die cutter includes an upper rotation axis and a lower rotation axis, and the upper rotation axis and the lower rotation axis are arranged to be parallel to each other and to face each other with the corrugated cardboard sheet feeding line interposed therebetween. And a disk-shaped upper rotary holder 70 and a lower rotary holder 72, respectively. The beard-shaped chip cutting blade 26 which is a feature of the present invention is common to the first embodiment and the second embodiment, and the blank punching blade 20 and the beard-shaped chip cutting blade 26 are provided on a flat surface. There is only a difference between being fixed or being fixed to a curved surface having an arc-shaped cross section.

  On the outer peripheral surface of the lower rotary holder 72, a corrugated sheet punching die 16 having a blank punching blade 20 and a whisker-like chip cutting blade 26 on one surface 22 is fixed. The cardboard sheet SS is fed along the cardboard sheet feed line with the lower rotary holder 72 rotated as shown by the arrow. Thereby, when the corrugated cardboard sheet SS passes between the upper rotary holder and the lower rotary holder, the punched blank SS is punched by the corrugated cardboard punching die 16, and at that time, the first embodiment and the second embodiment Similarly to the above, it is possible for the whisker-like cutting blade 26 to simultaneously cut the whisker-like chips G derived from the core N at the cutting end face, and to separate and remove the whisker-like chips G from the punched corrugated product (punched blank SS). . Note that the corrugated cardboard cutting die 16 may be fixed to the upper rotating holder 70.

Although the embodiments of the present invention have been described in detail above, various modifications or changes can be made by those skilled in the art without departing from the scope of the present invention.
For example, in the present embodiment, the corrugated product (punched blank SS) has been described as the punching die 16 for corrugated cardboard sheets that can punch out a plurality of corrugated products (punched blanks SS) by a single punching. The corrugated sheet blanking die 16 capable of punching one corrugated product (punched blank SS) by one punching may be used as long as it can cut the whisker-like chips G generated on at least one side of the cut end face. In two sets of opposing sides constituting a frame of one surface 22 of the corrugated cardboard sheet cutting die 16, one set of opposing sides, on which the waveform is not exposed on the punching cut surface, is cut into a whisker-like chip. The blade 26 may be provided.

For example, in the present embodiment, a plurality of whisker-like chip cutting blades 26 are provided on both of a pair of opposing sides of the corrugated cardboard punching die 16. However, the present invention is not limited to this. As long as it can cut the whisker chips G generated on at least one side of the cut blank SS), a single whisker-like cutting blade 26 may be used, and the center of one side of the corrugated cardboard product (the blank blank SS) may be used. In addition to providing them, they may be provided at any position on one side of the corrugated product (punched blank SS).
For example, in the present embodiment, a plurality of whisker-like chip cutting blades 26 are provided on both of a pair of opposing sides of the corrugated cardboard punching die 16. However, the present invention is not limited to this. A polygonal corrugated cardboard product (punched blank SS) or a corrugated cardboard product having a straight side in a part of a curved shape, as long as it can cut a whisker chip G generated on at least one cut end surface of the punched blank SS. (Punched blank SS) or one side of a corrugated product (punched blank SS) may be obliquely arranged.

For example, in the present embodiment, a plurality of whisker-like chip cutting blades 26 are provided on both of a pair of opposing sides of the corrugated cardboard punching die 16. However, the present invention is not limited to this. The plurality of whisker-like chip cutting blades 26 may not be the same as long as the whisker-like chips G generated on at least one cut end surface of the punched blank SS) can be cut, and at least one side of the frame starts from the inside of the frame. The blade length l extending in the direction may differ, may have a block-shaped base, or may have a thin blade.
For example, in this embodiment, the plurality of whisker-like chip cutting blades 26 provided on both of a pair of opposed sides of the corrugated paperboard cutting die 16 are described as being provided in a direction orthogonal to one side. However, the present invention is not limited to this. As long as it is possible to cut the whisker-like chips G generated on at least one of the cut end surfaces of the corrugated cardboard product (punched blank SS), the whisker-like chips need not be in a direction orthogonal to one side. The direction may be different for each cutting blade 26.

For example, in the present embodiment, the plurality of whisker-like chip cutting blades 26 provided on both of a pair of opposed sides of the corrugated cardboard cutting die 16 have been described as a so-called all-cut type, but the present invention is not limited thereto. As long as it is possible to cut the whisker-like chips G generated on at least one cut end face of the corrugated product (punched blank SS), a so-called half-cut type, or both a full-cut type and a half-cut type are included. You may be.
For example, in the present embodiment, the installation direction of the corrugated cardboard sheet S with respect to the lower plate 10 is adjusted with respect to a pair of opposed sides 44A and 44B provided with the whisker-like chip cutting blades 26 of the corrugated cardboard sheet punching die 16. However, the present invention is not limited to this, and a pair of opposing sides 44A and 44B provided with the whisker-like chip cutting blades 26 of the corrugated cardboard sheet cutting die 16 may have a corrugated shape of the core N of the corrugated cardboard sheet S. Of the corrugated cardboard product S (a blank blank SS) as long as it can cut the whisker-like chips G generated on at least one cut end surface of the corrugated cardboard product (punched blank SS). The direction may be adjusted.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic of the punching system which has the cutting die for cardboard sheets which concerns on 1st Embodiment of this invention. It is a top view showing the blanking die for cardboard sheets concerning a 1st embodiment of the present invention. It is a side view of a whisker-like chip cutting blade provided in the corrugated paperboard cutting die according to the first embodiment of the present invention. It is a side view of the modification of the whisker-like chip cutting blade provided in the corrugated-cardboard-sheet punching die which concerns on 1st Embodiment of this invention. It is a side view of the further modification of the whisker-like chip cutting blade provided in the corrugated-cardboard-sheet punching die which concerns on 1st Embodiment of this invention. FIG. 2 is a perspective view showing a corrugated sheet cutting die according to the first embodiment of the present invention. It is an outline top view showing arrangement with respect to a punching die of a corrugated cardboard sheet punched by a punching die for corrugated paperboard sheets concerning a 1st embodiment of the present invention. It is a top view of punching blank SS punched out by the corrugated-paper-sheet punching die concerning a 1st embodiment of the present invention. It is a top view of punching blank SS punched out by the corrugated-cardboard-sheet punching die concerning a 2nd embodiment of the present invention. It is the schematic of the punching system which has the cutting die for cardboard sheets which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the shipping state of a cardboard product. FIG. 4 is a schematic partial perspective view showing a crushing state when punching a corrugated cardboard sheet.

G Whisker-like chips F1 to F8 Frame S1 Front liner S2 Back liner N Middle core SS Punched blank S Corrugated cardboard sheet t Thickness of punched blank
h Specified height
w Blade thickness
l Blade length
d Predetermined interval 打 ち Punching angle 10 with respect to the extending direction of the waveform of the core N 10 Punching system 11 Upper plate 13 Lower plate 14 Punching device 16 Cutting die for corrugated cardboard sheet 18 Outer edge 20 Blank cutting tool 22 One surface 24 At least one side of the frame 25 Frame-shaped groove 26 Blade for cutting mustache-like chips 28 Rectangular bottom surface 30 Block-shaped base 32 Upper surface 34 Blade body 32 Slender upper surface 37 Truncated conical block-shaped base 38 Thin plate-shaped base 39 Circular bottom 40 Reinforcement 42 Slender slit 44 One pair of opposing sides 46 The other pair of opposing sides 48 A pair of long sides 50 Bottom 52 One pair of opposing sides 54 Another pair of opposing sides 56 A pair of inner sides 58 Bottom 70 Upper rotation holder 72 Lower rotation Holder 90 end face

Claims (9)

Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the corrugated cardboard sheet so that the punched blank can be punched. Projecting from the one surface toward the blade receiving plate on which the corrugated cardboard sheet is placed over a first predetermined height,
Furthermore, at least one side of the frame, from the one side, from the one side, so as to be able to cut and remove a whisker-like chip that may be generated in the center of the cut end face of the punched blank formed by the blank punching blade from the center. Have a plurality of beard-shaped chip cutting blades extending inwardly at predetermined intervals in the direction in which the one side extends, and each beard-shaped chip cutting blade has a cutting edge of the blank punching blade. A cutting edge is provided in the same direction, and is a dedicated blade that cuts a whisker-like chip without punching the outer shape of a punched blank in cooperation with the blank punching blade. Projecting from the surface over a second predetermined height,
A die for corrugated cardboard sheets, characterized in that: Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the cardboard sheet so that the punched blank can be punched. Projecting from the one surface toward the blade receiving plate on which the corrugated cardboard sheet is placed over a first predetermined height,
Further, at least one side of the frame-shaped blank cutting blade, so that a beard-like chip that can be generated at the center of the cut end face of the blank blank formed by the blank punching blade can be cut and separated from the center . It has a whisker-like chip cutting blade extending inward from the side in the extending direction , and the whisker-like chip cutting blade, from the one surface, according to the thickness of the corrugated cardboard sheet. A die for a corrugated cardboard sheet, which protrudes over a second predetermined height different from the first predetermined height. Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the cardboard sheet so that the punched blank can be punched. Projecting from the one surface toward the blade receiving plate on which the corrugated cardboard sheet is placed over a first predetermined height,
Furthermore, at least one side of the frame, from the one side, from the one side, so as to be able to cut and remove a whisker-like chip that may be generated in the center of the cut end face of the punched blank formed by the blank punching blade from the center. Have a plurality of beard-shaped chip cutting blades extending inwardly at predetermined intervals in the direction in which the one side extends, and the blade of each beard-shaped chip cutting blade has a blade in the direction in which the one side extends. The adjacent beard-shaped cutting blades are not connected to each other, the inner end is a free end, and the cutting edge is provided in the same direction as the cutting edge of the blank punching blade, depending on the thickness of the cardboard sheet. Protruding from the one surface over a second predetermined height;
A die for corrugated cardboard sheets, characterized in that: Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the corrugated cardboard sheet so that the punched blank can be punched. Projecting from the one surface toward the blade receiving plate on which the cardboard sheet is placed over a predetermined height,
Furthermore, at least one side of the frame, from the one side, from the one side, so as to be able to cut and remove a whisker-like chip that may be generated in the center of the cut end face of the punched blank formed by the blank punching blade from the center. Have a plurality of beard-shaped chip cutting blades extending inward at predetermined intervals in the direction in which the one side extends, and the blade of each beard-shaped chip cutting blade has a part of the frame shape. Characterized in that the cutting edge is provided in the same direction as the cutting edge of the blank punching cutter, and is a dedicated blade for cutting mustache-like chips. Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, there is provided a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank, and the blade of the blank punching blade according to the thickness of the cardboard sheet so that the punched blank can be punched. Projecting from the one surface toward the blade receiving plate on which the corrugated cardboard sheet is placed over a first predetermined height,
Furthermore, at least one side of the frame, from the one side, from the one side, so as to be able to cut and remove a whisker-like chip that may be generated in the center of the cut end face of the punched blank formed by the blank punching blade from the center. Have a plurality of beard-shaped chip cutting blades extending inwardly at predetermined intervals in the direction in which the one side extends, and each of the beard-shaped chip cutting blades cooperates with the blank punching blade. In order to be able to cut into the surface of the cardboard sheet placed on the blade receiving plate without punching out the outer shape of the punched blank , according to the whisker-like chips that can be generated at the center of the cut end face, The length and / or the predetermined interval extending inwardly of the frame is provided separately from the blank punching blade so that the blank can be individually set, and the blank punching is performed. A cutting die for a corrugated cardboard sheet, characterized in that the cutting edge is provided in the same direction as the cutting edge of the cutting blade, and protrudes from the one surface over a second predetermined height according to the thickness of the corrugated cardboard sheet. Front face liner, back liner, interposed between both liners, used to punch blank punched from corrugated cardboard sheet having a corrugated core that is bonded through both liners and the step top, A die for corrugated cardboard sheets,
On one surface, a plurality of blades for blank punching are provided, and are arranged in a frame shape corresponding to the outer peripheral edge of the punched blank as a whole so as to project toward a blade receiving plate on which a corrugated cardboard sheet is placed ,
On at least one side of the frame, has a linear blank punching cutter,
The blade of the linear blank punching blade extends in the extending direction of the one side so that the blank can be separated by a plurality of blank punching blades,
Furthermore, in the linear blank punching blade, the frame-shaped blank is cut so as to be able to cut and remove a whisker-like chip that may be generated in the center of the cut end face of the punched blank formed by the blank punching blade. Have a beard-shaped chip cutting blade extending inward in a direction branching from the direction of extension of the blade of the linear blank punching blade, and the beard-shaped chip cutting blade has the blank punching. A dedicated blade for cutting mustache-shaped chips without punching the outer shape of a punched blank in cooperation with a cutting blade, provided as a separate body from the linear blank punching blade, according to the thickness of the cardboard sheet. Projecting from the one surface over a predetermined height,
A die for corrugated cardboard sheets, characterized in that: On one surface, a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank is provided, and at least one side of the frame is directed inward from a side in the extending direction of the blank punching blade. Preparing a corrugated sheet cutting die provided with a beard-shaped chip cutting blade extending to
Positioning the corrugated cardboard sheet so that at least one side of the frame is oriented in a direction intersecting with the extending direction of the corrugated portion of the core of the corrugated cardboard sheet,
Pressing a blank cutting blade and a whisker-like chip cutting blade of a corrugated sheet blanking die against a corrugated cardboard sheet to punch out a punched blank from the corrugated cardboard sheet, and at the time of punching, only the whisker-like chip cutting blade Cutting and separating beard-like chips generated on the cut end face by the blank cutting blade. In correspondence with a plurality of punched blanks, a blade for blank punching extending in parallel with one opposing side of the frame and between the other opposing sides, and one opposing side in parallel with the other opposing side of the frame. A plurality of rectangular frames are formed by further having a blank punching blade extending between them, and arranging the whisker-like chip cutting blade on one and / or the other opposing side of each rectangular frame. When,
A single pressing of the corrugated sheet for the corrugated sheet for the corrugated cardboard sheet simultaneously punches a plurality of punched blanks, and in each punched blank, cuts a whisker-like chip generated at the time of punching and separates the blank from the punched blank. The punching method for a corrugated cardboard sheet according to claim 7, comprising: On one surface, a blank punching blade arranged in a frame shape corresponding to the outer peripheral edge of the punched blank is provided, and at least one side of the frame is directed inward from a side in the extending direction of the blank punching blade. Preparing a corrugated sheet cutting die provided with a beard-shaped chip cutting blade extending to
Positioning the corrugated cardboard sheet so that at least one side of the frame is oriented in a direction intersecting with the extending direction of the corrugated portion of the core of the corrugated cardboard sheet,
Pressing the blank cutting blade and whisker-like chip cutting blade of the corrugated sheet blanking die toward the blade receiving plate on which the corrugated cardboard sheet is placed , and punching the punched blank from the corrugated cardboard sheet. A step of cutting and separating the whisker-like chips generated on the cutting end face by the knives only by the whisker-like cutting blades,
Removing the punched blank from which the whisker-like chips have been cut from the cardboard sheet;
A method for producing a punched blank, comprising:

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