JP2017114039A - Ruled line machining method by die cutter and stripping die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of poor packaging by that a ruled line being easily broken and having small impact resilience is put easily at low cost regardless of directions.SOLUTION: In a step of manufacturing a blank B by punching a cardboard sheet S with a punching section 12 using a die cutter with a punching section 12 and a stripping section 13, and removing scraps with a stripping die 30 installed in the stripping section 13 after performing ruling in the cardboard sheet S, the stripping section 13, for example, performs the ruling furthermore by pressing the cardboard sheet S with a ruling member 35 installed to a male die 31 of the stripping die 30 at the position being the same as a first ruled line (a) put in the punching section 12. The ruling can deeply be performed so that a ruled line cracking phenomenon may not occur regardless of the fiber direction of paper and the direction of the ruled line to a stage direction, and thereby the bending resistance of the cardboard is sufficiently weakened in the ruled line and the repulsion can be suppressed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method of performing ruled line processing with a die cutter and a stripping mold used in the method.

  The cardboard box is sealed by folding a blank along a ruled line, assembling three-dimensionally, and gluing. Blank crease lines are pressed by a metal blade crease member at the same time as punching the corrugated cardboard sheet when manufacturing with a die cutter, but the pressure (crease pressure) at the time of crease is insufficient, resulting in the depth of the crease. However, when the folding resistance of the corrugated cardboard at the ruled line is not sufficiently weakened, after the corrugated cardboard box is assembled and sealed, the glued part may be peeled off due to the repulsive force of the folding, resulting in poor packaging.

  As a countermeasure, if the crease pressure is increased, a crease cracking phenomenon that the cardboard liner breaks may occur. In order to prevent the crease breakage phenomenon and to insert a deep crease line, the application of a creaser as described in Patent Document 1 below Can be considered. This creaser is provided in a flexo folder gluer that prints and glues cardboard and folds it, and presses the same portion in two steps by a two-stage roll continuous in the cardboard sheet passing direction.

  It is also conceivable to apply an embossing technique as described in Patent Document 2 below. This technology uses a die cutter with a punching section and a stripping section to emboss the corrugated cardboard and paperboard. Therefore, the stripping section has a separate embossing mold in addition to the stripping mold for scrap removal. The embossing is performed with the embossing mold of the part. By applying this technique and pressing the same position as the ruled line entered in the punching portion with a ruled member attached to the embossing die, it is possible to insert a deep ruled line while preventing the ruled cracking phenomenon.

JP 2001-113613 A Japanese Patent No. 4531450

  However, as described in Patent Document 1, in the method using a creaseer, only a ruled line extending in the threading direction of the corrugated cardboard sheet can be put, and it extends in a direction intersecting with the fiber direction of the paper and the corrugated cardboard direction. There are cases where the ruled lines cannot be deeply inserted.

  In addition, as described in Patent Document 2, in the method of mounting an embossing die provided with a crease member in addition to the stripping die for scrap removal on the stripping portion of the die cutter, the production of the embossing die requires a cost. In addition, there is a problem that it takes time to install the die cutter.

  Therefore, an object of the present invention is to prevent the occurrence of defective packaging by allowing a ruled line that is easy to break and has a small repulsion to be easily and at low cost regardless of the direction.

  In order to solve the above-described problems, a ruled line processing method according to the present invention uses a die cutter having a punching portion and a stripping portion, punches a cardboard sheet at the punching portion, and creases the cardboard sheet. Thereafter, in the step of manufacturing a blank by removing scraps with a stripping mold attached to the stripping section, the stripping section is stripped type at the same position as the ruled line put in the punching section. By pressing the cardboard sheet with the crease member, the crease is further performed.

  Then, the ruled line of the ruled line extending in the direction intersecting with the passing direction of the corrugated cardboard sheet is performed in the stripping part in addition to the punching part.

  In such a ruled line processing method, as the stripping type, a male substrate is used in which a ruled member that protrudes in the same direction as the dropping member for dropping debris and has a linear top is attached. To do.

  As the ruled member, an angle member having an L-shaped cross section is used, and a plate-like portion on one side protrudes from the substrate, and a plate-like portion on the other side is fixed to the substrate.

  With the ruled line processing method using the stripping mold according to the present invention, when the crease is made in the stripping part in addition to the punching part of the die cutter, regardless of the direction of the ruled line, the carding sheet passing direction and the paper fiber direction Even if the cardboard corrugation direction is the same, the ruled line extending in the direction intersecting the direction can be deeply inserted so as not to cause the cracking phenomenon, and the cardboard bending resistance at the ruled line is sufficiently weakened. , Repulsion can be suppressed.

  For this reason, it is easy to assemble the blank regardless of whether it is a caser or manual work, and the time-lapse restoration of the crushed state of the ruled line is also suppressed, so that the glued part peels off with the repulsion of the folding in the packaging state Can be eliminated.

  Also, as a stripping mold, a conventional male mold with a scraping member that drops scraps can be used and processed by adding a crease member to the board, so a separate wooden mold is created and attached to the die cutter. Therefore, it is possible to easily put ruled lines with low repulsion and low cost.

The figure which shows the blank of the cardboard box used as the application object of this invention The perspective view which shows the assembly state of a cardboard box same as the above Diagram of manufacturing process of cardboard box blank by die cutter Sectional view showing the state before processing at the punching part of the die cutter Sectional view showing the state during processing The figure which shows the corrugated board sheet processed by the punching part of the die cutter The figure which shows the stripping type male type | mold which concerns on this invention The figure which shows the female type of the stripping type same as the above Sectional views showing (I) state before processing and (II) state during processing at the stripping part of the die cutter.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  The ruled line processing method and the stripping mold according to the present invention are used, for example, for manufacturing a blank of a wrap round type cardboard box as shown in FIG. In this blank, the top plate 1, the side plate 2, the bottom plate 3, and the side plate 4 are sequentially arranged in the step direction, which is the direction in which the top of the center of the corrugated cardboard extends, and the passage piece 5 is continuously provided. Further, inner flaps 6 are connected to both ends of the side plates 2 and 4, and outer flaps 7 are connected to both ends of the top plate 1 and the bottom plate 3.

  The first ruled line a is at the boundary between the passage piece 5 and the top plate 1, the second ruled line b is at the boundary between the top plate 1 and the side plate 2, and the third ruled line c is at the boundary between the side plate 2 and the bottom plate 3. However, a fourth ruled line d is inserted at the boundary between the bottom plate 3 and the side plate 4, and a fifth ruled line e is formed at the boundary between the side plates 2, 4 and the inner flap 6, and the top plate 1 and the bottom plate 3. Sixth ruled lines f are respectively entered at the boundaries.

  A cut tape is attached to the back surface of the corrugated cardboard as a tear strip 8 for opening on the side plates 2 and 4 and the inner flaps 6 at both ends thereof, and an H-shaped cut line is formed at the center of the side plates 2 and 4. A cut start portion 9 is formed.

  When the blank is assembled into a solid body as shown in FIG. 2 and the article is packaged, the article is placed on the bottom plate 3, the side plates 2 and 4 are erected along the third ruled line c and the fourth ruled line d, and the top plate 1 is folded so as to cover the article along the second ruled line b, the passage piece 5 is folded along the first ruled line a so as to overlap the outer surface of the side plate 4, and the passage piece 5 is attached to the outer surface of the side plate 4. Affix with adhesive.

As shown in FIG. 3, the die cutter for producing the cardboard box blank B as described above has a sheet feeding unit 11 that supplies a large number of cardboard sheets S stacked one by one in a state in which the steps are directed in the passing direction. A punched portion 12 that is subjected to punching and primary ruled line processing on the fed cardboard sheet S, and a plurality of (three in the illustrated example) blanks B are formed side by side; _A stripping unit 13 that removes unnecessary portions such as ₁ and performs secondary ruled line processing, and a separation unit 14 that separates the feeding handle t ₂ from the cardboard sheet S are sequentially arranged. .

  In the punching section 12, as shown in FIG. 4, a punching die 21 attached to the upper board 12a and a face plate 22 attached to the lower board 12b face each other in the vertical direction, and are not cut into a predetermined dimension therebetween. A corrugated cardboard sheet S is fed.

  The cutting die 21 has a base 23 of a cutting edge 24 made of a metal strip and a ruled member 25 implanted in a substrate 23 made of a plywood plate, and both sides of the cutting edge 24 and the scored member 25 on the surface of the board 23. Cork 26 is attached, and sponge 27 is attached to the peripheral part and the intermediate part.

  The face plate 22 has a cork 29 attached to the surface of a substrate 28 made of a stainless steel plate so as to face both side portions of the ruled member 25 of the die 21.

  When processing at the punching unit 12, as shown in FIG. 5, the upper board 12 a and the lower board 12 b are brought close to each other, and the cardboard sheet S is sandwiched between the die 21 and the face plate 22. Accordingly, the blank B is punched into the cardboard sheet S with the cutting blade 24, and the primary ruled line processing is performed to put the first ruled line a to the sixth ruled line f into the blank B with the ruled member 25. Is done. In the drawing, the fifth ruled line e, the sixth ruled line f, and the score line of the cut start portion 9 are omitted.

  In this processing, the corrugated cardboard sheet S is pressed firmly by the cork 26 on both sides of the cutting blade 24 and the ruled member 25 so as not to move, and is pressed by the compressed sponge 27 so as not to float. . Then, after the upper plate 12a and the lower plate 12b are separated from each other, the corrugated sheet S is released from the die 21 by the elasticity of the sponge 27 after the clamping pressure between the die 21 and the face plate 22 is released.

As shown in FIG. 6, the corrugated cardboard sheet S thus processed has three blanks B arranged in parallel, and the periphery thereof is trimmed forward from the passage piece 5 side that is the rear in the direction in which the corrugated cardboard sheet S passes. part t ₁ is formed, and which suck portion t ₂ is formed on the front end side. The groove portion is also trim portion t ₁ becomes between the inner flap 6 and the outer flap 7 of the cardboard sheet S, the suck portion t ₂ and three blank B, and connected by a plurality of joint portions.

Next, the corrugated sheet S, by pulling grip the suck portion t ₂ gripper and sent to the stripping unit 13. A stripping die 30 comprising a male die 31 shown in FIG. 7 and a female die 32 shown in FIG.

  In the male mold 31 shown in FIG. 7, metal drop-out members 34a, 34b, 34c are attached to a substrate 33 made of a plywood slightly larger than the three blanks B arranged in parallel, and a ruled line made of a metal angle member is also provided. A member 35 is attached. Further, on the surface of the substrate 33, a sponge 36 is attached in the vicinity of the dropout members 34a, 34b, 34c and the ruled member 35, and a large number of round holes 37 are formed in the substrate 33 for weight reduction or the like.

抜落members 34a, 34b are arranged so as to face the passage piece 5 side and the both ends thereof in the trim portion t ₁ of the cardboard sheet S,抜落member 34c is the inner flap 6 and the outer flap of the cardboard sheet S 7 are arranged so as to oppose the groove portions between 7.

  The ruled member 35 is L-shaped in cross section, and is fixed by screws 35c in a state where the plate-like portion 35a on one side protrudes perpendicularly from the substrate 33 and the plate-like portion 35b on the other side runs along the substrate 33. Has been. The protruding height of the plate-like portion 35a from the substrate 33 is 17 mm to 19 mm, and the protruding height of the dropout members 34a, 34b, 34c from the substrate 33 is about 50 mm.

  In the female mold 32 shown in FIG. 8, a cutout groove 38 a is formed in the substrate 33 made of a veneer plate slightly smaller than the three blanks B arranged in correspondence with the dropout member 34 c, and the plate-like shape of the ruled member 35 is formed. Corresponding to the top of the part 35a, a sponge 39 having a width wider than this is pasted so as to be exposed on the surface. The sponge 39 is fitted into a recess formed by cutting the substrate 33 so as to be flush with the surface of the substrate 33.

In the stripping section 13, as shown in FIG. 9 (I), the male mold 31 is in a state where the cardboard sheet S is fed between the male mold 31 and the female mold 32 as shown in FIG. 9 (II). And the female mold 32 are brought close to each other. Accordingly,抜落members 34a, 34b, by 34c, the trim portion _{t 1} is dropped disconnect from the corrugated sheet S.

  Further, the first ruled line a is pressed again by the plate-like portion 35a of the ruled member 35, and secondary ruled line processing is performed. At this time, the shock accompanying the collision of the ruled member 35 with the corrugated cardboard sheet S is absorbed by the sponge 39.

After the male mold 31 and female mold 32 is separated, the corrugated sheet S, by pulling grip the suck portion t ₂ in the gripper, as shown in FIG. 3, is sent to the separating unit 14, separating In the part 14, the tail part t ₂ is cut off from the blank B. By repeating such a process, the blank B is stacked below the separation portion 14 and carried out by the conveyor.

  If the stripping unit 13 in addition to the die cutter punching unit 12 performs the ruled line by the above-described ruled line processing method, regardless of the direction of the ruled line, the threading direction of the corrugated sheet S, the fiber direction of the paper, and the corrugated cardboard Even when the step direction is the same, the first ruled line a extending in the direction intersecting the direction can be deeply inserted so as not to cause a rule cracking phenomenon, and the bending resistance of the cardboard at the first ruled line a can be reduced. We can weaken enough and can suppress repulsion.

  For this reason, the blank B shown in FIG. 1 can be easily assembled and sealed as shown in FIG. 2 regardless of whether it is a caser or manual work. And since the restoration of the crushing state of the first ruled line a over time is also suppressed in the sealed state, the adhesive between the side plate 4 and the passage piece 5 is accompanied with the repulsion of the bending at the first ruled line a in the packaged state. The problem of peeling off the attached part can be solved, and the product of the contents can be protected reliably

  Further, as the stripping die 30, a conventional male die having dropping members 34 a, 34 b, 34 c for dropping debris can be used, and a ruled line member 35 made of an angle material can be added to the substrate 33 so that a ruled line can be processed. In addition, it is not necessary to create a separate wooden mold and attach it to the die cutter, and it is possible to easily insert the first ruled line a with low cost and low rebound.

  In the above embodiment, the first ruled line a extending in the direction intersecting the direction of the corrugated cardboard is illustrated as being subjected to the secondary ruled line processing by the stripping unit 13, but according to this ruled line processing method, With respect to the ruled line extending in the direction parallel to the step direction, by attaching the ruled member 35 to the male die 31 of the stripping die 30 so as to correspond to the direction, it is possible to weaken the bending resistance and suppress the repulsion. .

  In addition, although the case where the ruled line is put on the cardboard has been illustrated, the ruled line processing method and the stripping type as described above can also be applied to the case where the ruled line is put on a paper board which is not a stepped structure. Can be suppressed.

B Blank 1 Top plate 2 Side plate 3 Bottom plate 4 Side plate 5 Passage piece 6 Inner flap 7 Outer flap 8 Tear strip 9 Start portion a First ruled line b Second ruled line c Third ruled line d Fourth ruled line e Fifth Ruled line f 6th ruled line S Corrugated cardboard sheet t ₁ Trim part t ₂ Grinding part 11 Paper feed part 12 Punching part 12a Upper board 12b Lower board 13 Stripping part 14 Cutting part 21 Cutting die 22 Face plate 23 Substrate 24 Cutting edge 25 Ruled line Insertion member 26 Cork 27 Sponge 28 Substrate 29 Cork 30 Stripping die 31 Male die 32 Female die 33 Substrate 34a, 34b, 34c Dropping member 35 Ruled member 35a, 35b Plate-like portion 35c Screw 36 Sponge 37 Round hole 38 Substrate 38a Ditch 39 Sponge

Claims (4)

After using a die cutter equipped with a punching part (12) and a stripping part (13), punching out the cardboard sheet (S) at the punching part (12) and marking the cardboard sheet (S) In the step of manufacturing a blank (B) by removing scraps with a stripping mold (30) attached to the stripping section (13),
In the stripping part (13), the corrugated sheet (S) is pressed by the ruled member (35) of the stripping mold (30) at the same position as the ruled line put in the punching part (12). Further, a ruled line processing method using a die cutter, wherein a ruled line is further formed.   The ruled line processing method using a die cutter according to claim 1, wherein a ruled line of a ruled line extending in a direction intersecting with a passing direction of the corrugated cardboard sheet (S) is added to the punching part (12) and the stripping part ( A ruled line processing method using a die cutter, which is performed in 13).   A stripping die (30) used in the ruled line processing method according to claim 1 or 2, wherein a drop-off member (34a, 34b, 34c) for dropping debris on the substrate (33) of the male die (31) A stripping type characterized in that a ruled member (35) protruding in the same direction and having a linear top is attached.   In the stripping mold (30) according to claim 3, an angle member having an L-shaped cross section is used as the ruled member (35), and a plate-like portion (35a) on one side thereof is a substrate (33). A stripping type characterized in that the plate-like portion (35b) on the other side is fixed to the substrate (33).

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