JP2014156054A - Sheet processing method and sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet processing method which can form a pattern creating a movement depending on a viewing angle rather than hot-stamping, and provide the sheet which creates the movement on the patten depending on the viewing angle.SOLUTION: First, in an embossing process S1, an uneven pattern by embossing is formed on a surface of a sheet. Then in a printing process S2, a raised part of the uneven pattern is selectively colored in accordance with the uneven pattern. Thereby, the sheet including the uneven pattern formed by the embossing and a color pattern formed by selectively coloring the raised part of the uneven pattern in accordance with the uneven pattern is obtained. As the uneven pattern and the color pattern are superimposed on the sheet, an interference fringe by reflecting light of different colors is changed depending on a viewing angle, and movement such as a color change can be created on a pattern formed of the uneven pattern and the color pattern.

Description

  The present invention relates to a sheet used for producing a box and a processing method thereof.

  A sheet used for making a box or a mount is usually printed with a color pattern or embossed. Further, some sheets on which a color pattern is printed include a metal foil or a hologram foil produced by embossing a metal foil by foil stamping (hot stamping).

  The color of the hologram pattern changes depending on the viewing angle. Therefore, when the hologram foil is transferred to the sheet, a hologram pattern can be put on the sheet, and the design of the sheet can be improved.

JP 2011-240499A

  However, with foil stamping, a hologram pattern can be placed locally on the sheet, but it is not realistic to place a hologram pattern on the entire surface of the sheet from the technical and cost aspects.

  Further, after the foil is transferred to the sheet by the foil pressing, printing of a color pattern on the sheet is avoided. Because burr is generated at the edge of the foil, when a sheet in which the burr of the foil is generated is put in the printing machine, the burr is removed from the foil in the printing machine, and the burr (metal piece) is formed. This is because the bad influence due to the residue is given to the printing press.

  An object of the present invention is to provide a sheet processing method that can form a pattern on a sheet that moves according to the viewing angle, rather than foil stamping.

  Another object of the present invention is to provide a sheet that can move a pattern according to a viewing angle.

  In order to achieve the above object, a sheet processing method according to one aspect of the present invention includes an embossing step of forming a concavo-convex pattern consisting of unevenness of the surface of a sheet of sheets by embossing, and after the embossing step, A printing step of selectively coloring a relatively concave portion or a relatively convex portion of the concavo-convex pattern along the concavo-convex pattern by printing.

  According to this method, first, in the embossing process, an uneven pattern by embossing is formed on the surface of a sheet of sheets. Next, in the printing process, a relatively concave portion or a relatively convex portion of the concavo-convex pattern is selectively colored along the concavo-convex pattern.

  The embossing method according to another aspect of the present invention includes a printing step of forming a printed pattern on a surface of a sheet of a sheet by printing, and an embossing after the printing step to the printed pattern of the sheet. And an embossing step of deforming the portion along the concave or convex.

  According to this method, first, in a printing process, a printed pattern is formed on the surface of a sheet of sheets. Next, in the embossing step, a portion along the printed pattern of the sheet is relatively deformed to be concave or convex by embossing.

  By these methods, the concavo-convex pattern formed by embossing and the relatively concave portion or the relatively convex portion of the concavo-convex pattern were formed by selectively coloring along the concavo-convex pattern A sheet containing a color pattern is obtained.

  In this sheet, the uneven pattern and the color pattern are overlapped, so the interference fringes due to the reflected light of different colors change depending on the viewing angle, and the pattern such as the uneven pattern and the color pattern changes in color, etc. Can be issued.

  In particular, when the sheet is a sheet having a metal layer on the surface, such as foil paper or vapor-deposited paper, the same movement as the hologram pattern can be produced in a pattern composed of an uneven pattern and a color pattern.

  A pattern like a hologram pattern that moves at the viewing angle is obtained by embossing and printing rather than foil stamping. Therefore, it is possible to put a pattern such as a hologram pattern on the entire surface of the sheet as well as partially. In addition, unlike the foil stamping, the embossing process does not cause burrs of the foil, so even if the printing process is performed after the embossing process, the printing machine does not have an adverse effect due to the residue generated by the removal of the burrs. Therefore, the freedom degree at the time of processing a sheet | seat can be raised.

  The embossing in the embossing process consists of a template with irregularities for the irregular pattern, and holding the template on the peripheral surface, pressing the template against the sheet, and the contact portion of the template with the sheet is the sheet A roller that is rotated so as to move in the same direction, and a front pad and a lateral pad are brought into contact with the front edge of the sheet and one side edge perpendicular to the front edge before the sheet contacts the template, respectively. , And an embossing apparatus including alignment means for aligning the sheet with the template.

  The template may be formed with relatively deep unevenness and relatively shallow unevenness for forming the uneven pattern.

  Thereby, in an embossing process, a relatively deep uneven pattern and a relatively shallow uneven pattern can be simultaneously formed on the sheet.

  According to the present invention, it is possible to form a pattern on the sheet that moves depending on the viewing angle, not foil pressing. By subjecting the sheet to an embossing process and a printing process, reflected light of different colors can be diffusely reflected on the surface of the sheet and interfere with each other. As a result, a pattern that causes a color change depending on the viewing angle can be formed on the sheet.

It is a process-process figure of a sheet | seat. It is an illustration sectional view showing a schematic structure of an embossing device. It is a perspective view which shows a part of recessed part. It is a top view of a template. It is an enlarged view of a changing type. It is a top view of the sheet | seat after an embossing process. It is a top view of the printing plate for cyan used in a printing process. It is a top view of the printing plate for magenta used in a printing process. It is a top view of the sheet | seat after a printing process. It is sectional drawing of the sheet | seat in the cutting plane line AA shown by FIG.

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

<Sheet processing method>

  FIG. 1 is a sheet processing diagram.

  In order to form a pattern on the sheet S (see FIG. 2) in which movement such as a color change occurs depending on the viewing angle, an embossing step S1 is first performed. In embossing process S1, the uneven | corrugated pattern which consists of the unevenness | corrugation of the surface is formed in the sheet | seat S of embossing by embossing.

  Next, printing process S2 is performed. In the printing step S2, the color pattern is formed so as to overlap the uneven pattern by printing. Specifically, a relatively convex portion of the concavo-convex pattern formed on the sheet S is selectively colored along the concavo-convex pattern.

  The sheet S may be a sheet having a metal layer on its surface, such as foil paper or vapor-deposited paper, or may be plain paper such as cardboard.

<Embossing>

  FIG. 2 is a schematic sectional view showing a schematic configuration of the embossing apparatus.

  In the embossing step S1, the embossing device 1 is used.

  The embossing device 1 includes a heating roller (heating cylinder) 2 and a pressing roller (pressing cylinder) 3. The heating roller 2 and the pressing roller 3 are provided so as to be rotatable around rotation axes that are parallel to each other, and are arranged so that their peripheral surfaces face each other with a minute interval.

  On the peripheral surface of the heating roller 2, a heater 11, a distance adjusting plate 12 and a template 13 are provided.

  The heater 11 has, for example, substantially the same width in the circumferential direction of the heating roller 2 and in the rotation axis direction (width direction).

  The interval adjusting plate 12 is stacked on the heater 11. The number of the interval adjusting plates 12 is appropriately determined according to the thickness of the sheet S so that the sheet S passing between the heating roller 2 and the pressing roller 3 is pressed against the template 13 described below with a predetermined pressing force. It is good to be changed to. The interval adjusting plate 12 is made of a flexible iron plate (for example, an iron plate having a thickness of 0.6 mm), and is formed in substantially the same size as the heater 6.

  The template 13 is laminated on the interval adjusting plate 12. The template 13 is made of a stainless steel plate having substantially the same size as the heater 11. The thickness of the template 13 may be any thickness that allows the template 13 to be curved along the peripheral surface of the heating roller 2 (the surface of the interval adjusting plate 12). It is in the range of 0 mm. When the template 13 is manually attached to the heating roller 2, the thickness of the template 13 is preferably 0.8 mm or less.

  A substantially rectangular concave portion 21 extending in the rotation axis direction of the pressure roller 3 is formed on the peripheral surface of the pressure roller 3.

  FIG. 3 is a perspective view showing a part of the recess.

  In the recess 21, a plurality of claws 22 are arranged at intervals in the longitudinal direction of the recess 21 (in the rotational axis direction of the pressing roller 3). Each claw 22 is supported by a common swing shaft 23 whose base end portion extends in the longitudinal direction of the recess 21, and extends from the swing shaft 23 to the upstream side in the rotation direction of the pressing roller 3. The swing shaft 23 is rotatably held by a bearing member (not shown).

  Corresponding to each claw 22, a gripping base 24 is provided adjacent to the recess 21 on the upstream side in the rotation direction of the pressing roller 3. The upper surface of the gripping table 24 is lowered by one step in the radial direction of the pressing roller 3 from the peripheral surface of the pressing roller 3.

  By the rotation of the swing shaft 23, each claw 22 swings between a gripping position where its tip end abuts on the top surface of the gripping table 24 and a release position spaced apart from the top surface of the gripping table 24. Each claw 22 is moved from the release position to the gripping position with the leading end of the sheet S (the end on the downstream side in the transport direction) entering between the leading end of each claw 22 positioned at the release position and the gripping base 24. By being displaced, the leading edge of the sheet S can be gripped between the leading edge of each claw 22 and the gripping table 24. And after the front-end | tip part of the sheet | seat S is hold | gripped between the front-end | tip part of each nail | claw 22, and the holding stand 24, as FIG. 2 shows, the sheet | seat S is pressed roller 3 with rotation of the press roller 3. It is drawn on the circumference.

  The heating roller 2 is rotated in synchronization with the rotation of the pressing roller 3. At the timing when the leading edge of the sheet S on the pressing roller 3 approaches the portion where the circumferential surface of the heating roller 2 and the circumferential surface of the pressing roller 3 are closest, the leading edge of the template 13 on the heating roller 2 is placed at that portion. (The end on the downstream side in the rotational direction) approaches. Then, the template 13 and the sheet S come into contact with each other by the rotation of the heating roller 2 and the pressing roller 3, and the unevenness formed on the template 13 is transferred to the surface of the sheet S in order from the front end portion by heating and pressing. It will be done. When the template 13 is separated from the sheet S due to the rotation of the heating roller 2 and the pressing roller 3, the embossing of the sheet S is completed, and each claw 22 is displaced from the gripping position to the release position. It is released from the gripping by the distal end portion and the gripping base 24. Thereafter, the embossed sheet S leaves the peripheral surface of the pressing roller 3 and is discharged to a discharge unit (not shown).

  Since the rotation of the heating roller 2 and the rotation of the pressing roller 3 are synchronized, when the sheet S is arranged at a certain position on the peripheral surface of the pressing roller 3, the template is placed at a certain position on the surface of the sheet S. 13 contacts. A position adjusting table 4 and a position adjusting mechanism 5 are provided on the upstream side of the pressing roller 3 in the conveying direction of the sheet S. In order to arrange the sheet S at a fixed position on the circumferential surface of the pressing roller 3, before the leading end of the sheet S is gripped between the leading end of each claw 22 and the gripping base 24, The position of the sheet S is adjusted by the position adjustment mechanism 5.

  The position adjusting table 4 extends in parallel with the rotation axis of the pressing roller 3. The sheet S is conveyed onto the position adjustment table 4 from a side opposite to the pressing roller 3 by a conveying roller (not shown).

  The position adjustment mechanism 5 includes a lateral pad 31, a front pad 32, and a sheet presser 33.

  The lateral pad 31 is arranged at one end of the position adjusting table 4 in the rotational axis direction (hereinafter referred to as “lateral direction”) of the pressing roller 3, for example, the left end in the sheet S conveyance direction. The lateral pad 31 has a substantially plate shape extending in a direction orthogonal to the lateral direction. On the other side in the lateral direction with respect to the lateral pad 31, a pair of lateral alignment rollers 34 are provided vertically. The upper and lower lateral alignment rollers 34 are in contact with the front surface (upper surface) and the rear surface (lower surface) of the sheet S conveyed onto the position adjustment table 4.

  The front pad 32 is disposed on the downstream side in the conveyance direction of the sheet S with respect to the position adjustment table 4. The front pad 32 is fixed to one end of an arm 35 that extends in a direction orthogonal to the lateral direction. The other end of the arm 35 is supported by a swing shaft 36 that extends laterally with respect to the front pad 32 on the downstream side in the conveying direction of the sheet S. By the rotation of the swing shaft 36, the front pad 32 is brought into contact with the leading edge (front edge) of the sheet S conveyed on the position adjustment table 4 and the sheet S from above the position adjustment table 4. It can be displaced to a retracted position that does not hinder the conveyance of the sheet.

  The sheet presser 33 is formed, for example, by bending a tip portion 37 of a metal bar in an arc shape. The base end portion of the sheet presser 33 is supported by a swing shaft 38 that extends in the lateral direction downstream of the front end portion 37 in the conveyance direction of the sheet S. By rotating the swing shaft 38, the front end portion 37 of the sheet presser 33 can be displaced to a press position where it comes into contact with the position adjustment table 4 from above and a press release position spaced above the position adjustment table 4. is there.

  When the leading edge of the sheet S conveyed on the position adjustment table 4 contacts the front pad 32 disposed at the contact position, the movement of the sheet S in the conveyance direction is restricted. Immediately thereafter, the pair of side-aligning rollers 34 rotates, and the pair of side-aligning rollers 34 moves the sheet S toward the side pad 31 on the position adjustment table 4. When the edge of the sheet S comes into contact with the lateral pad 31, further movement of the sheet S is restricted. At this moment, the leading end 37 of the sheet presser 33 is displaced from the press release position to the press position. As a result, the sheet S is positioned on the position adjustment table 4.

  When the gripping base 24 of the pressing roller 3 is opposed to the leading end portion of the sheet S by the rotation of the pressing roller S, the front pad 32 is displaced from the contact position to the retracted position in time. Immediately after that, each claw 22 is displaced from the release position to the gripping position so that the leading edge of the sheet S is gripped between the leading edge of each claw 22 and the gripping base 24 and the leading edge 37 of the sheet presser 33. Is displaced from the press position to the press release position. As a result, in each embossing step S <b> 1, a certain position of the sheet S is sandwiched between the tip of each claw 22 and the gripping base 24, and the sheet S is disposed at a certain position on the circumferential surface of the pressing roller 3.

<Type plate>

  FIG. 4 is a plan view of the template.

  In the template 13, an embossing die 41 having fine irregularities is formed in a plurality of rectangular areas A1 provided in a matrix. The depth of the unevenness of the embossing die 41 is 0.1 to 0.3 mm.

  In addition, a changing die 42 having unevenness finer than the embossing die 41 is formed in a part of the rectangular region A2 in each region A1.

  In FIG. 4, the unevenness of the embossing die 41 and the changing die 42 is indicated by hatching.

  Further, a plurality of register marks 43 are formed in the blank area around the area A1 in the template 13.

  FIG. 5 is an enlarged view of the changing type.

  The changing mold 42 is a mold for microembossing, and has concave portions 51 and convex portions 52 alternately. The space | interval (depth of an unevenness | corrugation) between the bottom face of the recessed part 51 and the upper surface of the convex part 52 is 5-20 micrometers, for example. Moreover, the width | variety of the recessed part 51 is 0.05 mm, for example, and the width | variety of the convex part 52 is 0.05 mm, for example.

  FIG. 6 is a plan view of the sheet after the embossing process.

  When embossing using the embossing apparatus 1 is performed on the sheet S in the embossing step S1, the surface of the sheet S has an uneven pattern by the embossing mold 41 in the area A1 of the template 13 and the area of the template 13 A changing pattern by the changing mold 42 of A2 and a register mark (register mark) by the register mold 43 of the template 13 are formed.

  The changing pattern includes a convex portion 61 corresponding to the concave portion 51 of the template 8 and a concave portion 62 corresponding to the convex portion 52 of the template 8.

<Printing>

  7 and 8 are plan views of a printing plate used in the printing process.

  In the printing step S2, printing using the printing plates 71 and 72 is performed in a printing machine (not shown).

  The printing plate 71 is a plate for forming a cyan printing pattern on the sheet S, for example. As shown in FIG. 7, the printing plate 71 has a convex portion 73 having a shape corresponding to the concave portion 51 of the changing mold 42 of the template 13.

  The printing plate 72 is a plate for forming a magenta printing pattern on the sheet S, for example. As shown in FIG. 8, the printing plate 72 has a convex portion 74 having a shape corresponding to the concave portion 51 of the changing mold 42 of the template 13 and the convex portion 73 of the printing plate 71.

  FIG. 9 is a plan view of the sheet after the printing process. FIG. 10 is a cross-sectional view of the sheet taken along section line AA shown in FIG.

  In the printing step S <b> 2, first, a cyan printing pattern is formed on the sheet S by printing using the printing plate 71. Specifically, in the printing machine, the position of the sheet S is determined based on the registration marks formed on the sheet S. Then, after cyan ink is applied to the convex portion 73 of the printing plate 71, the printing plate 71 is pressed against the surface of the sheet S, and the cyan ink is transferred to the surface of the sheet S. By this printing, a portion 81 along one edge of the convex portion 61 of the changing pattern of the sheet S is colored cyan, and a cyan printed pattern is formed on the sheet S.

  Next, a magenta print pattern is formed on the sheet S by printing using the printing plate 72. Specifically, after magenta ink is applied to the convex portions 74 of the printing plate 72, the printing plate 72 is positioned and pressed against the surface of the sheet S, and the magenta ink is transferred to the surface of the sheet S. The By this printing, the portion 82 along the cyan-colored portion 81 in the convex portion 61 of the changing pattern of the sheet S is colored magenta, and a magenta printed pattern is formed on the sheet S.

  In FIGS. 7 and 8, the appearance of ink adhering to the convex portions 73 and 74 is indicated by hatching.

<Effect>

  Thus, first, in the embossing step S1, an uneven pattern by embossing is formed on the surface of the sheet S of sheets. Next, in printing process S2, the convex part 61 of a concavo-convex pattern is selectively colored along a concavo-convex pattern.

  Thereby, the sheet | seat S containing the uneven | corrugated pattern formed by embossing and the color pattern formed by selectively coloring the convex part 61 of an uneven | corrugated pattern along an uneven | corrugated pattern is obtained.

  In the sheet S, the uneven pattern and the color pattern are formed so as to overlap with each other. Therefore, the interference fringes due to the reflected light having different colors change depending on the viewing angle, and the movement of the uneven pattern and the pattern including the color pattern changes. Can be issued.

  In particular, when the sheet S is a sheet having a metal layer on its surface, such as foil paper or vapor-deposited paper, the same movement as the hologram pattern can be produced in a pattern composed of a concavo-convex pattern and a color pattern.

  A pattern like a hologram pattern that moves at the viewing angle is obtained by embossing and printing rather than foil stamping. Therefore, a pattern such as a hologram pattern can be put on the entire surface of the sheet S. Further, unlike the foil stamping, the embossing step S1 does not cause burrs of the foil. Therefore, even if the printing step S2 is performed after the embossing step S1, the printing machine does not have an adverse effect due to the residue generated by the removal of the burrs. Therefore, the freedom degree at the time of processing the sheet | seat S can be raised.

  The template 13 used in the embossing step S1 may be formed with an embossing die 41 composed of relatively deep irregularities and a changing die 42 composed of relatively shallow irregularities for forming an uneven pattern.

  Thereby, a relatively deep uneven pattern and a relatively shallow uneven pattern can be simultaneously formed on the sheet S in the embossing step S1.

<Modification>

  As mentioned above, although one Embodiment of this invention was described, this invention can also be implemented with another form.

  In the above-described embodiment, the case where the printing step S2 is performed after the embossing step S1 in order to form a pattern on the sheet S in which movement such as a color change occurs depending on the viewing angle has been taken up. However, the printing step S2 may be performed first, and then the embossing step S1 may be performed.

  Further, although the template 13 has the changing die 42, the template 13 is not limited to the changing die 42, and it is only necessary to have a die made of fine irregularities for microembossing.

  Although two printing plates 71 and 72 are used in the printing step S2, even if the sheet S is colored in a single color (cyan, magenta, yellow or black) by single color printing using one printing plate. Good. Further, the sheet S may be colored into three or more colors by multicolor printing using three or more printing plates.

  Moreover, although the case where it colors to the convex part 61 of the uneven | corrugated pattern formed in the sheet | seat S was taken as an example, the recessed part 62 may be selectively colored.

  In addition, various design changes can be made to the above-described configuration within the scope of the matters described in the claims.

1 Embossing device 2 Heating roller (roller)
4 Position adjustment stand (Positioning means)
5 Position adjustment mechanism (positioning means)
13 Type plate 31 Front pad 32 Side pad 41 Embossed type (relatively deep unevenness)
42 Changing type (relatively shallow unevenness)
61 Convex part (uneven pattern)
62 Concave part (concave / convex pattern)
81 parts (color pattern)
82 parts (color pattern)
S sheet

Claims (6)

By embossing, an embossing process for forming a concavo-convex pattern consisting of ruggedness on the surface of a sheet of sheets,
A sheet processing method including a printing step of selectively coloring a relatively concave portion or a relatively convex portion of the concavo-convex pattern along the concavo-convex pattern by printing after the embossing step. A printing process for forming a printed pattern on the surface of the sheet of the sheet by printing;
An embossing step of deforming a portion along the printed pattern of the sheet into a concave or convex shape by embossing after the printing step.   In the embossing step, a template on which irregularities for the irregular pattern are formed, and holding the template on a peripheral surface, pressing the template against the sheet, and the sheet in the template A roller that is rotated so that a contact portion of the sheet moves in the same direction as the sheet, and a front edge of the sheet and a first edge that is orthogonal to the front edge before the sheet contacts the template, respectively. 3. The sheet processing method according to claim 1, wherein an embossing apparatus is provided that includes an alignment unit configured to align the sheet with the template by bringing a front pad and a lateral pad into contact with each other.   The sheet processing method according to claim 3, wherein a relatively deep unevenness and a relatively shallow unevenness for forming the uneven pattern are formed on the template.   The sheet processing method according to any one of claims 1 to 4, wherein the sheet has a metal layer on a surface thereof. The uneven pattern formed by embossing,
A sheet including a color pattern formed by selectively coloring a relatively concave portion or a relatively convex portion of the uneven pattern along the uneven pattern.

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