JP5076540B2 - Embossing method and blank sheet produced thereby - Google Patents

Description

  The present invention belongs to the technical field of embossing for imparting irregularities to a blank sheet formed by punching a paperboard or a resin sheet, and particularly relates to an embossing method for forming irregularities at the end of a blank sheet. .

Conventionally, as a paper box for putting and selling confectionery etc., a blank sheet with sack is raised like a square tube, closed by filling the contents from the other opening and closing it Many types of seal end type are used. This type of paper box is provided with an opening mechanism for taking out the contents. For example, there are one provided with a belt-like zipper at the closed portion and one provided with a belt-like zipper that goes around the trunk. In particular, in order to be able to re-seal, a slit is provided at the knob and the position corresponding to the knob, the perforation from the knob starts to be opened, and when closing, the knob is locked to the slit. Many of these types are also used.
JP 7-257558 A JP-A-8-11869 JP 2001-139025 A

  The paper box as described above is configured to open the paper box by breaking a perforation using a knob for starting opening. However, since the picking portion is provided where the paperboards overlap each other on the side surface or end surface of the paper box, the picking portion is in contact with the lower paperboard, and the fingertip does not easily get caught on the tip of the picking portion and is difficult to open. Therefore, if there is a convex part at the end that becomes the knob part, it will be easy to open because the fingertip will be caught, but embossing is applied to the part surrounded by the sheet, and it is taboo to do at the end of the sheet ing.

  In general, there are the following two embossing methods. First, the first method is to attach a concave mold made of metal or resin to a blank sheet punching machine such as a platen, and a convex mold made of metal or resin on the opposite face plate. In addition, the sheet is press-molded by combining these irregularities simultaneously with blanking. Another method is a method in which the embossing is formed in a desired position of the sheet in advance using a sheet press such as a foil stamping machine, and then blanking is performed with a punching machine.

  In the first method, since the edge portion must be punched out simultaneously with the molding, the cutting is performed by a so-called shear cut method in which the blade is applied to the edge of the embossed edge. Therefore, as a blade, a double blade often used in a general punching die cannot be used. Further, the sheet cannot be punched unless the emboss type has a hard and sharp edge like a blade. However, such an embossing die is very expensive because of the cost of materials and processing. Further, with this method, if the punching blade and the embossing die are displaced slightly and the edges overlap, the cutting edge will be crushed, and conversely if the gap is opened, the sheet cut edge will chatter.

  In the case of the second method, since the emboss is in a closed shape, it is necessary to cut off a part of the emboss when blanking is performed after molding. This is troublesome twice, and since the cutter is pressed against the hollow emboss, the emboss is crushed. In addition, it is necessary to frequently match the position for pulling out the blank and the position of the emboss, and there is a problem that it takes time and effort.

  This invention is made in view of such a problem, The place made into the objective is the embossing method which can form the cutting | disconnection end surface of an embossing in the exposed part in the edge part of a blank sheet in one process. And a blank sheet formed thereby.

In order to achieve the above object, the embossing method of the present invention attaches a concave mold to a blanking die of a blank sheet punching machine, attaches a convex mold to a face plate facing the punching die, by the sheet is press-molded by unevenness of the convex mold come together, meet embossing method to form the cutting end face of the embossed edge portion of the blank sheet exposed state, Oshikiru the ends of the blank sheet to together the cutting edge of the cutting blade when the seat straw cutter by providing an extension to the convex mold is to rest on the convex mold so as to be located outside the cutting blade of the cutting die, the cutting edge of the cutting blade convex mold The concave mold is processed at the position where it hits the side of the cutting blade so that it does not interfere with the extended part of the convex mold. By types fits, with embossing the sheet in between, the embossed as Oshikiru on convex mold is characterized in that so as to punch out the sheet.

  And in said embossing method, a convex type | mold may be made into a step shape, and you may make it use the cutting blade which combined the some blade divided | segmented according to the height of the convex type | mold.

  According to the embossing method of the present invention, even if the convex die on the face plate side and the cutting blade on the punching die side are slightly shifted, the edge of the blank sheet is not embossed in one step without causing serious damage to the blade edge. An exposed end face can be formed.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic explanatory view showing a main part of a punching machine for performing an embossing method according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. In FIG. 2, the sheet is shown in a state where it is inserted.

  1 and 2, reference numeral 1 denotes a concave mold attached to a blanking die of a blank sheet punching machine, and 2 denotes a convex mold attached to a face plate facing the punching die. These concave mold 1 and convex mold 2 are both made of metal or synthetic resin. Reference numeral 3 denotes a cutting blade attached to the punching die to push the end of the blank sheet, and the convex mold 2 is provided with an extending portion 2a so as to be positioned outside the cutting blade 3, whereby the cutting blade 3 cutting edges are placed on the convex mold 2. Further, the cutting blade 3 has its cutting edge processed into a concave shape that matches the convex mold 2, and the concave mold 1 is stopped before the position where it strikes the side surface of the cutting blade 3, and the convex mold 2 extends. It does not interfere with the part 2a.

  When the sheet S is press-formed with this punching machine, the concave mold 1 is fitted into the convex mold 2 as shown in the figure, so that the sheet S in between is embossed and the sheet S is punched out. . In this case, since the sheet S is cut as if it is pressed onto the cutting board by hand, even if the convex mold 2 on the face plate side and the cutting blade 3 on the punching mold side are slightly shifted, serious damage is given to the cutting edge. It can be punched neatly without any problems.

  That is, in the normal shear cut method, if the blade is shifted to the rear side even a little, the entire blade will be applied to the convex mold and serious damage will be caused. Conversely, if the blade is shifted to the front side, it will not be cut. Since the blade only moves on the mold, the alignment is rough (not very accurate). In terms of the lateral displacement, the shear cut method does not affect the displacement somewhat. In the present invention, the blade is caught by the end of the convex mold, but the blade is crushed within the displacement range. Therefore, when viewed comprehensively, it can be said that the cutting board system as in the present invention is more resistant to displacement.

  FIG. 3 is a schematic explanatory view showing the main part of another type of punching machine for performing the embossing method according to the present invention, and FIGS. 4 (a), 4 (b), and 4 (c) are respectively AA and B in FIG. It is -B and CC sectional drawing. In FIG. 4, the sheet is shown in a state where it is inserted.

  As shown in FIGS. 3 and 4, this punching machine uses a cutting blade 3 in which a plurality of blades 3 a, 3 b, 3 c divided according to the height of the step-shaped convex mold 2 are combined. . In this form, in order to match the shape of the cutting edge of the cutting blade 3 to the convex mold 2, it is not necessary to perform complicated processing. In other words, the unevenness can be matched only by setting a blade whose height is lowered by the height of the step. In addition, since the embossed form rises in a staircase shape compared to the shape that gently rises in a tapered shape, the embossed formed has a clear contour at each step and has a stronger shape retention 3D shape.

  The concave mold 1 attached to the punching mold only needs to properly hold the convex contour of the convex mold 2 attached to the face plate. That is, since it is not necessary to cover the entire top surface of the convex mold 2, for example, as shown in FIG. 5, the concave mold 1 has ruled line blades 1 a and 1 b that are often used in general punching molds. It can be made by bending along the contour. Thereby, the concave mold 1 does not need to be formed by hollowing out a member. Thus, the concave mold 1 can be simplified by dividing the concave mold 1 so as to correspond to each step of the convex mold 2 on the face plate side.

  The convex mold 2 attached to the face plate is separately manufactured by processing a metal or high-strength resin. For example, as shown in FIG. 6, the convex mold 2 includes a pedestal portion 21 and an embossed portion 22 overlapping therewith. Of these, the pedestal portion 21 is not attached to the base portion of the line where the embossed portion 22 and the cutting blade 3 hit, and only the embossed portion 22 is exposed in the vicinity thereof. Thereby, the pressing blade for forming a blank peripheral edge can be made to approach the base part 21 without interfering with the mounting part of the convex mold 2 for embossing. By providing the pedestal portion 21 in this manner, the convex mold 2 can be more firmly attached to the face plate.

  Moreover, what is necessary is just to use the joining member 4 as shown in FIG. 7 for position alignment with the concave mold | type 1 and the convex mold | type 2. As shown in FIG. That is, as shown in FIG. 8, the convex mold 2 attached to the face plate 6 side is temporarily attached to the concave mold 1 attached to the die 5 via the joining member 4 in advance, and the base of the convex mold 2 Adhesive F is attached to the back surface of the portion 21, and when the die 5 and the face plate 6 are attached to the punching machine and they are combined, they are separated from the die 5 and transferred to the face plate 6 side. . Thereby, the uneven | corrugated position of the face plate 6 side and the punching die 5 side can be correctly aligned without performing complicated alignment adjustment. In addition, several streaky protrusions 4 a protruding from the outer edge of the joining member 4 are ribs for attaching the joining member 4 to the punching die 5 with appropriate strength.

  In any of the above-described types of punching machines, the concave mold 1 is attached to the punching die and the convex mold 2 is attached to the mounting face plate. On the contrary, the concave mold 1 is attached to the face plate and convex to the punching die. The mold 2 may be attached.

  A typical example of the sheet S is paperboard. In this case, in order to achieve good embossing, the height of each step in the convex mold 2 is preferably about 0.3 to 0.6 mm. Needless to say, the sheet S is a plastic sheet or other paper. In that case, the height of each step in the convex mold 2 may be appropriately determined in consideration of the degree of embossing.

  The pedestal portion 21 of the convex mold 2 is suitably about 0.1 to 0.3 mm, and more preferably about 0.15 to 0.25 mm.

  As shown in FIG. 9, the convex mold 2 may be attached to the face plate separately in both the inside and outside except the line L where the pressing blade hits. Further, the outside of the cut line L may be inclined with respect to both the pedestal portion 21 and the embossed portion 22, and this is preferable because the sheet gently follows the face plate during processing.

  As a material of the convex mold 2, a copper alloy, a stainless alloy, an iron alloy, a chromium alloy and the like can be used, including an epoxy resin containing glass fiber. Also, tool steel (quenched steel for blades) can be used. Whichever material is used, it is preferable that the convex mold 2 has a higher hardness than the cutting blade 3. By doing so, the durability of the convex mold 2 is improved, and even if the convex mold 2 and the cutting blade 3 are slightly displaced in the vertical direction, the convex mold 2 is not scratched and is elastic. A certain cutting blade 3 only needs to be slightly crushed.

  The cutting blade 3 attached to the punching die does not necessarily have to be linear as shown in FIG. For example, as shown in FIGS. 10 and 11, when the cutting blade 3 is inflated to the outside, a protruding portion is formed at the edge of the blank sheet. Can be expected.

  Further, as shown in FIGS. 10 and 11, the cutting blade 3 on the punching die side corresponding to each step of the convex mold 2 on the face plate side and divided into a plurality of blades 3a, 3b, 3c is a blade 3b. As described above, the part may be extended while being bent by being removed from the portion corresponding to the convex mold 2. In this way, it is possible to more firmly fix the cutting blade 3 that tends to be unstable because each blade is short to the punching die.

  According to the embossing method described above, a blank sheet having an emboss on the edge is formed. Therefore, in the blank sheet forming the paper box, by using this swollen embossed part as a knob, a gap is formed between the overlapped lower paperboard and the fingertips are easily caught, and a paper box that is easy to open Can be formed. Further, it is possible to adopt a structure in which the corner portion of the paperboard is hooked and locked to such an expanded embossed portion, and the design range of the paper box can be expanded by effectively utilizing the embossed portion.

  The embodiments of the present invention have been described in detail above. However, the embossing method according to the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. It is.

It is a schematic explanatory drawing which shows the principal part of the punching machine which performs the embossing method which concerns on this invention. It is AA sectional drawing of FIG. It is a schematic explanatory drawing which shows the principal part of another type of punching machine which performs the embossing method which concerns on this invention. (A), (b), (c) is AA, BB, CC sectional drawing of FIG. 3, respectively. It is a schematic explanatory drawing which shows another example of the concave mold | type attached to a cutting die. It is not description for showing the convex type | mold which consists of a base part and the embossed part which overlaps on it. It is a perspective view which shows the joining member used for position alignment of a concave shape and a convex shape. It is explanatory drawing which shows the positioning method of a concave shape and a convex shape. It is a perspective view which shows the modification of a convex type | mold. It is a top view which shows the modification of a cutting blade with a convex type | mold. It is a perspective view of FIG.

Explanation of symbols

S sheet 1 concave mold 1a, 1b ruled line blade 2 convex mold 2a extension part 21 pedestal part 22 embossed part 3 cutting blade 3a, 3b, 3c blade 4 joining member 5 punching die 6 face plate

Claims (3)

It is attached a concave type cutting die blank sheet cutting machine, fitted with a convex type surface plate facing the cutting die, by pressing a sheet by a concave mold and the unevenness of the convex mold come together at the same time as the blank vent An embossing method in which the cut end face of the emboss is formed in an exposed state at the end of the blank sheet, and extends into a convex mold so as to be positioned outside the punching die cutting blade that pushes the end of the blank sheet parts to together the cutting edge of the cutting blade when the seat straw cutter is to rest on the convex mold by providing a previously processed cutting edge of the cutting blade in the shape of a concave that fits the convex type, moreover, a concave type Stop at the position where it hits the side of the cutting blade so that it does not interfere with the extension of the convex mold, and embosses the sheet between them by fitting the concave mold into the convex mold during press molding Both embossing method is characterized in that so as to punch out the sheet so as to Oshikiru embossed on convex mold.   The embossing method according to claim 1, wherein a cutting blade is used in which the convex mold is stepped and a plurality of blades divided according to the height of the convex mold are combined.   The blank sheet | seat which has the embossing provided by the embossing method of Claim 1 or 2 in an end surface.

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