JP2010023262A - Laminating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminating device which enables obtaining a valuable article and reduces waste sheet. <P>SOLUTION: Between a first feed roll 1 and a second feed roll 2 on the transfer route of a sheet-like substrate A, a unit 10 for printing a UV-curable adhesive on the substrate A, nip rolls 20, a UV irradiation unit 30, and a peeling means are provided. The substrate A being fed intermittently between the first feed roll 1 and the second feed roll 2, so that the adhesive printing is performed while the substrate A advances. A transfer sheet S0 including a metal foil mounted on the mold sheet S1 overlaps the adhesive B to form a sheet laminated body S1 on the substrate A. By irradiating the sheet laminated body S1 with UV to cure the adhesive B, and peeling the mold sheet S1 with the peeling means, the metal foil is transferred onto the adhesive B. When the substrate A goes backward, by causing the nip rolls 20 to go back at the same speed in the same direction by the same amount as the substrate A does, the adhesive B is prevented from being pulled back upstream from between the nip rolls 20, thereby allowing none of the metal foil to peel off from the uncured adhesive B. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a laminating apparatus for transferring a metal foil onto a continuous sheet-like substrate such as a seal or a label.

As a transfer device (bonding device) for transferring a metal foil to a continuous sheet-like substrate, a device described in Patent Document 1 has been conventionally known. In this bonding apparatus, as shown in FIG. 4, a printing unit 10 having an impression cylinder 11 and a plate cylinder 12 is provided in the transfer path of the substrate A, and UV curing is performed on one side of the substrate A by the printing unit 10. The mold adhesive B is printed, and the transfer sheet S ₀ provided with the metal foil s _{2 on} one side of the release sheet s ₁ is overlaid so that the metal foil s ₂ faces the printing surface of the substrate A. Te, bonded to the transfer sheet S ₀ to the substrate a by nipping by a pair of upper and lower nip roll 20, is irradiated with ultraviolet rays emitted from the ultraviolet irradiation unit 30 on one side of the sheet stack S ₁ formed by the bonding After fixing the metal foil s ₂ by curing the pressure-sensitive adhesive B, the release sheet s ₁ is peeled off from the substrate A, and the metal foil s ₂ is transferred onto the pressure-sensitive adhesive B.

  By the way, in the said bonding apparatus, since printing of an adhesive is based on the continuous rotary printing system which prints by continuously rotating the impression cylinder 11 and the plate cylinder 12 of the printing unit 10 in the transfer direction of the base material A. The pressure-sensitive adhesive is printed at a pitch equal to the circumference of the plate cylinder 12, and there is a disadvantage that a lot of damaged paper is generated between the printed pressure-sensitive adhesives B.

  Here, in the rotary printing method, there is an intermittent rotary printing method in addition to the continuous rotary printing method as described above. In this intermittent web printing system, there is a intermittent web printing system in which a substrate is intermittently fed by intermittent rotation of a pair of feed rolls and printing is performed when the substrate is transferred. In this case, since the interval between printed materials becomes very small, it is possible to reduce paper loss, but at the time of rising rotation until the stopped feed roll becomes equal to the peripheral speed of the plate cylinder, and printing is completed. Since the base material is also transferred at the time of falling rotation until the feed roll that has been rotated at a constant speed later stops, the waste paper cannot be completely eliminated.

  In order to minimize waste paper, the feed amount of the base material by the rising and falling rotations of the feed roll is between the printing plate attached to the plate cylinder and the next printing is completed. There has been proposed an intermittent web printing method in which the substrate is moved backward by a substantially equivalent amount.

  Adopting the intermittent web printing method in which the base material is moved backward after the forward feeding of the base material as described above can minimize the waste paper, and the base material and the transfer sheet. Effective use can be achieved.

JP 2004-195754 A

  By the way, when the intermediate rotary printing method in which the base material is repeatedly fed forward and backward is employed in the bonding apparatus described in Patent Document 1, when the base material is retracted, the uncured material that has once passed through the nip rolls. The adhesive is pulled back to the upstream side of the nip roll. In this case, the metal foil of the transfer sheet is peeled off from the release sheet in an incomplete state due to adhesion with the uncured adhesive, so that the metal foil with poor smoothness and gloss is transferred to the substrate. As a result, there arises a problem that a low-value product is formed.

  In addition to the metal foil transfer device as described above, the laminating device prints a varnish for polishing on the ink-printed surface of an ink-printed substrate, and maintains the smoothness of the varnish. A paste is printed on the ink-printed surface of an ink-printed substrate that has been bonded to a film and the film is peeled after the varnish is cured, and the laminate film is adhered to the substrate via the adhesive. In some cases, the laminate film is half-cut along the periphery of the ink printing surface, and the laminate film to be removed is peeled off from the substrate.

  In the laminating apparatus as described above, when the intermediate rotary printing method in which the base material is repeatedly fed forward and backward is adopted, when the base material is retracted, the uncured varnish or glue that has once passed through the nip roll is temporarily removed. It will be pulled back to the upstream side of the nip roll, and at the peeling boundary position between the substrate and the film, a linear pattern is formed on the varnish or glue, resulting in the formation of a low-value product.

  The subject of this invention is providing the bonding apparatus with little generation | occurrence | production of a waste paper which can obtain a high value goods.

  In order to solve the above problems, in the first invention, two pairs of a pair of upper and lower feed rolls that are rotated in the forward and reverse directions are provided in the transfer path of the continuous sheet-like substrate at intervals in the transfer direction of the substrate. A rotary printing unit for applying an adhesive that prints an ultraviolet curable adhesive on one side of the base material in order from the upstream side between the two pairs of feed rolls, and a metal on one side of the release sheet A pair of nip rolls that form a sheet laminate by bonding the transfer sheet provided with the foil to the substrate so that the metal foil is adhered to the adhesive printed by the printing unit, and one side of the sheet laminate An ultraviolet irradiation unit for irradiating ultraviolet rays from the side to cure the adhesive and a peeling means for peeling the release sheet from the sheet laminate are provided, and the two pairs of feed rolls are moved in the forward feed direction of the substrate. Intermittent constant speed This is roughly equivalent to the forward feed operation that moves the base material toward the downstream side, and the feed amount of the base material by the rising rotation and falling rotation of the feed roll during forward feed by reversing the feed roll after the forward stop. Repeat the reverse feed operation that pulls the base material upstream by the amount, prints the adhesive with the printing unit when moving forward, cures the adhesive by irradiating ultraviolet rays from the ultraviolet irradiation unit, and puts the metal foil on the adhesive In the laminating apparatus adapted to transfer to the substrate, a support that rotatably supports the pair of nip rolls is supported so as to be movable in the transfer direction of the substrate. A configuration in which a moving device that moves backward by the same amount at the same speed in the same direction is employed.

  In the laminating apparatus having the above-described configuration, the base material is repeatedly advanced and retracted by rotating the two pairs of feed rolls, and the adhesive is printed by the printing unit during the advancement, and the transfer sheet is printed on the printing surface. And a transfer sheet is bonded to the substrate by the nip pressure (nip pressure) of the nip roll to form a sheet laminate. The sheet laminate is irradiated with ultraviolet rays emitted from an ultraviolet irradiation unit to cure the adhesive and fix the metal foil. After the adhesive is cured, the release sheet is peeled off from the base material, and the adhesive is coated with metal. Transfer the foil.

  In the transfer of the metal foil as described above, when the substrate is advanced, the two pairs of feed rolls are accelerated from the stopped state, and the peripheral speed thereof is the peripheral speed of the printing plate attached to the plate cylinder of the printing unit. When they are equal, they are rotated at a constant speed, and printing is performed during the rotation at the constant speed. And when printing is completed, it decelerates and stops.

  Also, when the base material is moved backward, the base material is pulled back to the upstream side by an amount substantially equivalent to the feed amount of the base material at the time of rising rotation by acceleration of the pair of feed rolls and at the time of falling rotation by deceleration. The interval between the adhesives to be reduced is reduced, and the occurrence of damaged paper is suppressed.

  Also, when pulling back due to the backward movement of the base material, the support device supporting the pair of nip rolls is moved by the same amount at the same speed and in the same direction as the backward direction of the base material by the operation of the moving device. The uncured pressure-sensitive adhesive thus formed is prevented from being drawn upstream from the pair of nip rolls.

  Thus, the metal foil of the transfer sheet is uncured by moving the support that supports the pair of nip rolls at the same speed and in the same direction as the backward direction of the base material when the base material is pulled back by the backward movement. It is possible to prevent peeling from the release sheet in an incomplete state due to adhesion with the pressure-sensitive adhesive.

  Here, as the moving device, it is possible to employ a driving pulley and a driven pulley, and a belt including a belt that is spanned between both pulleys and a support is connected to a part thereof.

  In order to solve the above problems, in the second invention, an ink-printed substrate is used, and an ultraviolet curable varnish is used instead of the ultraviolet curable adhesive according to the first invention. The varnish was printed on the ink printing surface, and a film was used instead of the release sheet to maintain the smoothness of the varnish printed by the film.

  In the said 2nd invention, after hardening a varnish by irradiation of an ultraviolet-ray, a film is peeled from a base material.

  In order to solve the above problems, in the third invention, an ink printed material is used as a base material, and an ultraviolet curable adhesive is employed in place of the ultraviolet curable adhesive according to the first invention. The glue was printed on the ink printing surface, and a laminate film was used instead of the release sheet.

  In the third aspect of the invention, after the paste is cured by irradiation of ultraviolet rays, the laminate film is half-cut along the periphery of the ink printing surface, and the laminate film to be removed is peeled off from the substrate. .

  As described above, in the first invention, when the base material is repeatedly advanced and retracted, the support that rotatably supports the pair of nip rolls at the same speed and in the same direction as the base material. The uncured pressure-sensitive adhesive printed on the substrate is prevented from being pulled upstream from the pair of nip rolls, so that the metal foil of the transfer sheet is bonded to the uncured pressure-sensitive adhesive. It is no longer incompletely peeled from the release sheet, and a glossy metal foil with high smoothness can be transferred to the substrate.

  In addition, since the adhesive is printed by the intermittent rotary printing method by repeatedly moving the substrate forward and backward, the interval between the metal foil transferred to the adhesive is small, and the damaged paper of the substrate and the transfer sheet Occurrence can be minimized.

  In the second and third inventions, since the film or the laminate film is not peeled off from the printed portion of the varnish or glue printed on the base material, a linear pattern is formed on the varnish or glue. There is no such inconvenience, and a product with a high commercial value can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. As shown in FIGS. 1 and 2, the continuous sheet-like base material A drawn from the base material roll R ₁ is made of paper or synthetic resin sheet. In the transfer path of the base material A, a pair of first feed rolls 1 and a pair of second feed rolls 2 are provided at intervals in the transport direction of the base material A. One of the pair of first feed rolls 1 is rotationally driven by a servo motor 3. One of the pair of second feed rolls 2 is rotationally driven by a servo motor 4.

The continuous sheet-like base material A drawn out from the base material roll R ₁ is passed over the dancer roll 5 in the previous stage between the pair of first feed rolls ₁ to form a loop L ₁ . A loop may be formed by a suction box instead of the dancer roll 5.

In the transfer path of the base material A between the first feed roll 1 and the second feed roll 2, a printing unit 10 that prints an ultraviolet curable adhesive on one side of the base material A in order from the upstream side, and a sheet roll A pair of nip rolls 20 forming the sheet laminate S ₁ by bonding the transfer sheet S ₀ drawn from R ₂ to the adhesive printing surface side of the substrate A, and ultraviolet rays from one side of the sheet laminate S _1. An ultraviolet irradiation unit 30 for irradiating and curing the adhesive is provided.

  The printing unit 10 includes an impression cylinder 11, a plate cylinder 12, and a supply roll 14 that supplies an adhesive to a printing plate 13 attached to the outer periphery of the printing cylinder 12, and pressurizes the adhesive supplied to the printing plate 13. Printing is performed on the base material A inserted between the cylinder 11 and the plate cylinder 12. The printing unit 10 is not limited to a relief printing type as described above, and may be an offset printing type or a gravure printing type.

  Here, the pressure-sensitive adhesive is an epoxy acrylate, urethane acrylate, acrylic modified polyester or the like oligomer, and a monomer such as neoventyl glycol acrylate or trimethylol propane acrylate for the purpose of adjusting the cross-linked structure or viscosity. Further, a photopolymerization initiator is blended, and is cured by irradiating with ultraviolet rays.

Transfer sheet S _0, as shown in FIG. 3, the release sheet s ₁ having releasing property made of a transparent synthetic resin sheet made of a metal foil s ₂ Metropolitan provided on the one surface. Metal foil s ₂ is Aluminum, chromium, antimony, copper, a metal or an alloy thereof such as silver, it is provided on the entire one surface of the release sheet s ₁ by vapor deposition or the like.

The transfer sheet S ₀ is led out between the pair of nip rolls 20 so that the metal foil s ₂ faces the adhesive printing surface side of the substrate A, and is based on the clamping pressure (nip pressure) of the pair of nip rolls 20. Affixed to material A. Sheet laminate S ₁ is formed by the bonding.

  As shown in FIG. 1, both ends of the pair of nip rolls 20 are rotatably supported by a support body 21. The support 21 is movable along a linear rail 22 extending in the transfer direction of the substrate A, and is moved in the transfer direction of the substrate A by the moving device 23.

  The moving device 23 includes a drive pulley 25 rotated by a servo motor 24, a driven pulley 26, and an endless belt 27 spanned between the pulleys 25 and 26. 21 are connected, and the support body 21 is moved along the linear rail 22 by the movement of the belt 27.

The ultraviolet irradiation unit 30 includes an ultraviolet irradiation lamp, and the ultraviolet light emitted from the lamp passes through the release sheet s ₁ and irradiates the adhesive B. Pressure-sensitive adhesive B was cured by the irradiation, the metal foil s ₂ is secured. In addition, when the base material A consists of a transparent film, you may make it provide the ultraviolet irradiation unit 30 in the base material A side.

As shown in FIG. 1, a peeling means 40 for peeling the release sheet s ₁ from the substrate A is provided between the ultraviolet irradiation unit 30 and the second feed roll 2. The peeling means 40 includes a pair of peeling rolls 41, and the release sheet s ₁ is peeled off by pulling up the release sheet s ₁ along one of the pair of peeling rolls 41. The release sheet s ₁ after peeling is wound up by the drum 42.

The base material A that has passed through the pair of second feed rolls 2 is stretched around the dancer roll 50 to form a loop L _{2, and} is taken up by the take-up drum 51.

The laminating apparatus shown in the embodiment has the above structure, and when transferring the metal foil s ₂ to the base material A, the pair of first feed rolls 1 and the pair of second feed rolls 2 are synchronously rotated, By repeating forward and reverse rotations of both rolls 1 and 2, the base material A is advanced by a predetermined amount toward the downstream side, and after that advancement, the base material A is moved backward by a predetermined amount toward the upstream side, so that the base material A is directed downstream. To send it intermittently.

Then, the adhesive is printed on the substrate A by the printing plate 13 on the plate cylinder 12 that continuously rotates in one direction of the printing unit 10 when the substrate A that is intermittently fed forwards. In this way, by feeding the base material A intermittently, the adhesive is successively printed on one side of the base material A. B in FIG. 2 shows a printed adhesive. When the printed adhesive B passes between the pair of nip rolls 20, the transfer sheet S ₀ is overlaid on the adhesive squeezed by the nip roll 20. It is bonded to the timber a sheet laminate S ₁ is formed.

When the sheet laminate S ₁ is transferred to the position of the ultraviolet irradiation unit 30, the adhesive B is cured by the irradiation of ultraviolet rays from the ultraviolet irradiation unit 30. Curing the metal foil s ₂ of the transfer sheet S ₀ is fixed, pull up the release sheet s ₁ from the peeling roll 41, by peeling the release sheet s ₁ from the substrate A, the metal foil in the adhesive B s ₂ is to be transferred.

The base material A having the metal foil s ₂ transferred onto the adhesive B is taken up by the take-up drum 51, while the release sheet s ₁ peeled from the base material A is taken up by the drum 42.

  Here, when printing the adhesive, the pair of first feed rolls 1 and the pair of second feed rolls 2 are accelerated from the stopped state, and the peripheral speed thereof is the printing plate 13 attached to the plate cylinder 12 of the printing unit 10. When the rotation speed is equal to the peripheral speed, the rotation is performed at a constant speed, and printing is performed during the rotation at the constant speed. And when printing is completed, it decelerates and stops.

  Further, when the base material A is moved backward, it substantially corresponds to the feed amount of the base material A during the rising rotation by acceleration of the pair of first feed rolls 1 and the pair of second feed rolls 2 and during the falling rotation by deceleration. The base material A is pulled back to the upstream side by an amount to be reduced, and the interval between the printed adhesives B is reduced to suppress the occurrence of paper loss.

  Further, when the base material A is pulled back by the backward movement, the support 21 supporting the pair of nip rolls 20 is moved by the same amount in the same direction as the backward direction of the base material A by the movement of the endless belt 27 of the moving device 23. Thus, the uncured adhesive B printed on the substrate A is prevented from being drawn upstream from the pair of nip rolls 20.

In this way, by moving the support body 21 supporting the pair of nip rolls 20 in the same direction as the backward direction of the base material A by the same amount when the base material A is pulled back by the backward movement, the transfer sheet S ₀ is moved. can be a metal foil s ₂ is prevented from being peeled off in an incomplete state from the release sheet s ₁ by bonding with the uncured adhesive.

  When the base material A is advanced, the support 21 supporting the pair of nip rolls 20 is moved at the same speed in the same direction as the forward direction of the base material A by the movement of the endless belt 27 and is moved to the original standby position. Stop.

In the embodiment, the UV curable adhesive B is printed on the substrate A by the printing unit 10 and the metal foil s ₂ is transferred to the adhesive, but the substrate A is printed with ink. The UV curable varnish is used instead of the UV curable adhesive, the varnish is printed on the ink printing surface, and the film is used instead of the release sheet s ₁ and printed by the film. The smoothness of the varnish may be maintained.

  In this case, after the varnish is cured by irradiation of ultraviolet rays, the peeling means 40 peels the film from the substrate.

  In addition, while using ink-printed substrate A, UV-curable glue is used instead of UV-curable adhesive, the glue is printed on the ink-printed surface, and replaced with a release sheet. A laminated film may be used.

  In this case, after the paste is cured by irradiation with ultraviolet rays, the laminate film is half-cut along the periphery of the ink printing surface, and the laminate film to be removed is peeled off from the substrate by the peeling means 40.

  In any case, since the film or laminate film is not peeled off from the printed part of the varnish or glue printed on the substrate, there is no inconvenience that a linear pattern is formed on the varnish or glue, Products with a high commercial value can be obtained.

Schematic which shows embodiment of the bonding apparatus which concerns on this invention FIG. 1 is an overall perspective view excluding the moving device of FIG. Cross section of transfer sheet A perspective view showing a conventional bonding apparatus

Explanation of symbols

A base material S ₀ transfer sheet S ₁ sheet laminate s ₁ release sheet s ₂ metal foil B adhesive 1 first feed roll 2 second feed roll 10 printing unit 20 nip roll 21 support 23 moving device 25 drive pulley 26 driven Pulley 27 Belt 30 Ultraviolet irradiation unit 40 Peeling means

Claims (4)

Two sets of a pair of upper and lower feed rolls rotated forward and backward are provided in the transfer path of the continuous sheet-like base material at intervals in the direction of transport of the base material, and between the two pairs of feed rolls from the upstream side In order, a rotary printing unit for applying an adhesive that prints an ultraviolet curable adhesive on one side of a substrate, and a transfer sheet provided with a metal foil on one side of a release sheet, the metal foil is a printing unit. A pair of nip rolls that are bonded to the base material to form a sheet laminate so as to be adhered to the adhesive printed by the ultraviolet ray, and an ultraviolet irradiation unit that cures the adhesive by irradiating ultraviolet rays from one side of the sheet laminate And a peeling means for peeling the release sheet from the sheet laminate, and the two pairs of feed rolls are rotated intermittently at a constant speed in the forward feed direction of the base material to direct the base material to the downstream side. Moving forward Then, after the forward stop, the feed roll is reversely rotated, and the reverse feed operation for pulling the base material upstream by an amount substantially equivalent to the feed amount of the base material due to the rising rotation and falling rotation of the feed roll during forward feeding is repeatedly performed. In the bonding apparatus in which the adhesive is printed by the printing unit at the time of advancement, the adhesive is cured by irradiation of ultraviolet rays from the ultraviolet irradiation unit, and the metal foil is transferred onto the adhesive.
A support that rotatably supports the pair of nip rolls is supported so as to be movable in the substrate transfer direction, and when the substrate is retracted, the support is retracted by the same amount in the same direction as the substrate. A laminating apparatus provided with a moving device to be moved.   The laminating device according to claim 1, wherein the moving device includes a driving pulley and a driven pulley, and a belt that is spanned between both pulleys and to which the support is connected in part. Two sets of a pair of upper and lower feed rolls that are rotated forward and backward are provided in the transfer path of the continuous sheet-like base material on which ink printing has been performed at equal intervals, spaced in the direction of transfer of the base material, and the two pairs of pairs In order from the upstream side, a rotary printing unit that prints an ultraviolet curable varnish on the ink printing surface of the substrate and a film laminated on the varnish printing surface side of the substrate A pair of nip rolls forming a body, an ultraviolet irradiation unit for irradiating ultraviolet rays from one side of the sheet laminate to cure the varnish, and a peeling means for peeling the film from the sheet laminate, A forward feed operation in which the pair of feed rolls are intermittently rotated at a constant speed in the forward feed direction of the base material and the base material is moved toward the downstream side. Feeding roll Repeatedly performing a reverse feed operation that pulls the base material back to the upstream side by an amount substantially corresponding to the feed amount of the base material by the rising rotation and the falling rotation, printing the varnish on the ink printing surface by the printing unit during forward feeding, In the laminating apparatus that cures the varnish by irradiating ultraviolet rays from the ultraviolet irradiation unit,
A support that rotatably supports the pair of nip rolls is supported so as to be movable in the transport direction of the base material, and when the base material is moved backward, the support body is moved in the same direction and at the same speed as the base material by the same amount. A laminating apparatus provided with a moving device that moves backward. Two sets of a pair of upper and lower feed rolls that are rotated forward and backward are provided in the transfer path of the continuous sheet-like base material on which ink printing has been performed at equal intervals, spaced in the direction of transfer of the base material, and the two pairs of pairs In order from the upstream side, a rotary printing unit that prints UV curable glue on the ink printing surface of the substrate, and a sheet laminated by laminating a film on the paste printing surface side of the substrate A pair of nip rolls for forming a body, an ultraviolet irradiation unit for irradiating ultraviolet rays from one side of the sheet laminate to cure the paste, and a peeling means for peeling the film from the sheet laminate. A forward feed operation in which the pair of feed rolls are intermittently rotated at a constant speed in the forward feed direction of the base material and the base material is moved toward the downstream side. Standing feed roll Repeat the backward feeding operation of pulling the substrate back to the upstream side by an amount substantially corresponding to the amount of feeding of the substrate due to rolling rotation and falling rotation, printing glue on the ink printing surface by the printing unit during forward feeding, In a laminating apparatus that cures glue by irradiating ultraviolet rays from an ultraviolet irradiation unit,
A support that rotatably supports the pair of nip rolls is supported so as to be movable in the transport direction of the base material, and when the base material is moved backward, the support body is moved in the same direction and at the same speed as the base material by the same amount. A laminating apparatus provided with a moving device that moves backward.

Images