JP2009208308A - Foil transfer apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foil transfer apparatus which enables an accurate transfer process even when a base material and a foil are intermittently fed. <P>SOLUTION: The foil transfer apparatus includes: base material feeding means 2a, 2b which intermittently feed the base material 1; a printing unit 3a, 3b which print the adhesive onto the base material 1; and a foil transferring part 4 which superimposes the foil 10 on the base material 1 and transfers the foil 10 on the adhesive-coated parts. The foil transfer part 4 includes: a foil feeding part 11 which supplies the foil 10; a contacting part 12 which makes the foil 10 contact the base material 1; and a foil collection part 13 which peels the other parts than the adhesive-coated parts of the foil 10 off the base material 1 and collects them. The foil feeding part 11 includes: a loop forming part 20 which makes a looping part R1 by slacking the foil 10; and a foil feeding roller 18 which intermittently feeds the foil 10 through the loop forming part 20 in synchronization with the base material 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a foil transfer device used for manufacturing labels, stickers and the like, and more particularly to a foil transfer device capable of intermittently feeding a base material and a foil.

Conventionally, as a device for transferring a foil such as a gold foil, a feed roller for continuously feeding a base material, a printing unit for printing an adhesive on the base material, and transferring the foil onto the adhesive application portion by overlaying the foil on the base material And a foil transfer part that can continuously transfer the foil (for example, see Patent Document 1).
JP 2002-59694 A

In recent years, variable printing (variable printing) that allows easy replacement of print information has attracted attention. In a variable printing machine, a mechanism for intermittently feeding a base material is usually used to cope with a change in size of print information.
Even in the above-described foil transfer technology, application of variable printing to adhesive printing has been studied. However, since the foil needs to be intermittently fed in accordance with the base material, the running of the foil becomes unstable and wrinkles are caused. As a result, there is a risk that a problem may occur in transfer processing.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a foil transfer apparatus capable of performing accurate transfer processing even when intermittently feeding a base material and a foil.

The foil transfer apparatus of the present invention includes a substrate feeding means for intermittently feeding a substrate, a printing unit for printing an adhesive on the substrate, and transferring the foil onto the adhesive application portion by overlapping the foil on the substrate. A foil transfer part that is configured to provide a foil supply part that supplies the foil, an abutment part that abuts the foil against the base material, and a foil other than the adhesive-applied part. A foil collecting unit that peels and collects from the base material, and the foil supply unit wraps the foil in a loop shape to form a loop unit, and the foil that has passed through the loop forming unit, And a foil feed roller that intermittently feeds in synchronization with the base material.
The loop forming section includes a loop forming roller that feeds and moves the foil, a loop sensor that detects a length of the loop section, and a length of the loop section that is detected by the loop sensor. It can be set as the structure which has a loop control part which controls a rotational speed.
In the foil transfer apparatus according to the present invention, the foil supply unit includes a loop housing portion that houses the loop portion, and the loop housing portion is formed in a box shape to accommodate the loop portion, and the main body. It can be set as the structure which has an exhaust part which decompresses the inside and suck | sucks the said loop part in the hanging direction.
The foil recovery unit is a loop that makes the foil peeled off from the base material intermittently in synchronization with the base material, and a loop that wraps the foil that has passed through the foil feed roller into a loop shape. It can be set as the structure provided with the formation part.
As the pressure-sensitive adhesive, an ultraviolet curable pressure-sensitive adhesive is suitable.
In the foil transfer device of the present invention, an ultraviolet irradiation unit that irradiates the pressure-sensitive adhesive with ultraviolet rays to enhance the adhesiveness can be provided between the contact portion and the foil collection unit.

In the foil transfer device of the present invention, the foil supply unit includes a loop forming unit that sags the foil in a loop shape to form a loop unit, so that an excessive tensile force is applied to the foil when the foil is intermittently fed. Or excessive slack does not occur.
For this reason, the running of the foil is stabilized, the generation of wrinkles is prevented, and a highly accurate transfer process is possible.
Further, since the substrate can be intermittently fed, the printing size can be changed without replacing the plate cylinder or the like in the printing unit. Therefore, it is possible to cope with the production of various small-quantity products, which is advantageous in terms of cost. Further, since it is not necessary to replace the plate cylinder or the like, it is possible to reduce the burden caused by replacement work or maintenance work.
Moreover, since the foil is bonded to the base material with an adhesive, the safety of the operation can be improved as compared with the foil pressing process that requires heating.
The foil transfer apparatus of the present invention can also be used as a laminating apparatus by using a laminate material instead of the foil. In this case as well, the laminating material can be stabilized, wrinkles can be prevented, and highly accurate laminating can be performed.

FIG. 1 is a schematic configuration diagram showing an embodiment of a foil transfer apparatus of the present invention.
The foil transfer apparatus shown here includes base material feed rollers 2 a and 2 b (base material feed means) for intermittently feeding the base material 1, printing units 3 a and 3 b for printing an adhesive on the base material 1, and the base material 1. A foil transfer unit 4 that overlaps the foil 10 and transfers the foil 10 to the adhesive application portion is provided.
The pressure-sensitive adhesive is not particularly limited as long as it can adhere the foil 10 to the substrate 1, but an ultraviolet curable pressure-sensitive adhesive is particularly preferable. Hereinafter, a case where an ultraviolet curable adhesive (UV adhesive) is used will be described as an example.

As shown in FIG. 2, the printing unit 3a includes a plate cylinder 6, a blanket cylinder 7, and an impression cylinder 8, respectively. The printing unit 3b can have the same configuration.
The peripheral surface of the blanket cylinder 7 is partitioned into a large diameter portion 7a that becomes a printing surface and a small diameter portion 7b that is not in contact with the base material 1, and contacts the peripheral surface of the large diameter portion 7a. Printing is performed.
The base material feed rollers 2a and 2b are intermittently operated in accordance with the operation of the printing units 3a and 3b by a control unit (not shown).
In the illustrated printing unit, a three-cylinder system using a plate cylinder, a blanket cylinder, and an impression cylinder is adopted. However, the present invention is not limited to this, and a plate cylinder having a large diameter portion and a small diameter portion, and an impression cylinder A two-cylinder system including In the two-cylinder system, printing is performed by a plate cylinder.

As shown in FIG. 1, the foil transfer unit 4 includes a foil supply unit 11 that supplies the foil 10, a pressure roller 12 (abutment unit) that abuts the foil 10 against the base material 1, and cures the adhesive. An ultraviolet irradiation unit 21 (UV irradiation unit) for adhering the foil 10 to the base material 1 and a foil recovery unit 13 for peeling and recovering the unbonded portion of the foil 10 from the base material 1 are provided.
The foil supply unit 11 is connected to the foil supply roller 14, the loop forming unit 20 that sags the foil 10 in a loop shape to form the loop unit R 1, the foil feed roller 18 that intermittently feeds the foil 10, and the foil feed roller 18. The intermittent operation control part 19 and the loop accommodating part 22 which accommodates the loop part R1 are provided.

The loop forming unit 20 includes a loop forming roller 15 that feeds and moves the foil 10, a loop sensor 16 that detects the length of the loop portion R1 in the hanging direction (vertical direction in the figure), and the loop portion R1 that is detected by the loop sensor 16. A loop control unit 17 for controlling the rotation speed of the loop forming roller 15 based on the length of the loop forming roller 15.
The loop sensor 16 includes, for example, a light source (not shown) and a light receiving part (not shown) that receives light from the light source. When the loop part R1 exceeds a predetermined length, the light source is moved to the light receiving part. Can be used that is blocked by the loop R1. The light receiving unit can be configured to send a signal corresponding to the intensity of received light to the loop control unit 17.
The loop control unit 17 increases the rotation speed of the loop forming roller 15 when the length of the loop portion R1 falls below a predetermined range, and rotates the loop forming roller 15 when the length of the loop portion R1 exceeds the predetermined range. By reducing the number, the length of the loop portion R1 can be maintained within a predetermined range.

The loop housing portion 22 includes a main body portion 22a formed in a box shape having an upper opening, and an exhaust fan 22b (exhaust portion) provided at a lower portion of the main body portion 22a.
The exhaust fan 22b can reduce the inside of the main body portion 22a and suck the loop portion R1 in the hanging direction, thereby preventing the posture of the loop portion R1 from being disturbed and preventing wrinkles due to meandering.
The intermittent operation control unit 19 drives a motor (not shown) in synchronization with the operation of the base material feed rollers 2a and 2b, and can rotate the foil feed roller 18 by this motor. For this reason, the foil feed roller 18 can intermittently feed the foil 10 in synchronization with the feed of the substrate 1.

  The foil collecting unit 13 includes a foil feeding roller 25 that intermittently feeds the foil 10 peeled from the base material 1 by the peeling unit 24, an intermittent operation control unit 29 connected to the foil feeding roller 25, and the foil 10 in a loop shape. A loop forming section 30 that is slackened to form a loop section R2, a loop housing section 32 that houses the loop section R2, and a winding roller 31 that winds up the foil 10 are provided.

  The intermittent operation control unit 29 can drive a motor (not shown) in synchronization with the operations of the base material feed rollers 2a and 2b, and can rotate the foil feed roller 25 by this motor. For this reason, the foil feeding roller 25 can intermittently feed the foil 10 in synchronization with the travel of the base material 1.

The loop forming unit 30 includes a loop forming roller 26 that feeds and moves the foil 10, a loop sensor 27 that detects the length of the loop portion R2 in the hanging direction (vertical direction in the drawing), and the loop portion R2 that is detected by the loop sensor 27. And a loop control unit 28 for controlling the rotational speed of the loop forming roller 26 based on the length of the loop.
The loop control unit 28 increases the rotation speed of the loop forming roller 26 when the length of the loop portion R2 falls below a predetermined range, and rotates the loop forming roller 26 when the length of the loop portion R2 exceeds the predetermined range. By reducing the number, the length of the loop portion R2 can be maintained within a predetermined range.
The loop sensor 27 can employ the same configuration as the loop sensor 16.

The loop housing portion 32 includes a main body portion 32a formed in a box shape having an upper opening, and an exhaust fan 32b (exhaust portion) provided at a lower portion of the main body portion 32a.
The exhaust fan 32b can reduce the inside of the main body portion 32a and suck the loop portion R2 in the hanging direction, thereby preventing the posture of the loop portion R2 from being disturbed and preventing wrinkles due to meandering.

The UV irradiation unit 21 can enhance the adhesiveness of the pressure-sensitive adhesive by irradiation with ultraviolet rays (UV). Specifically, the pressure-sensitive adhesive can be cured to adhere the foil 10 to the substrate 1. The UV irradiation unit 21 is provided between the pressure roller 12 and the foil collection unit 13.
A general-purpose UV lamp can be used for the UV irradiation unit 21.
In the case where an adhesive other than the UV adhesive is used and the foil 10 is sufficiently adhered to the substrate 1 in the pressure roller 12, UV irradiation is not necessary.
The foil 10 is preferably in the form of a tape and used in a state where it is stacked on a support (not shown) having the same shape.

All of the rollers between the foil feed roller 18 and the foil feed roller 25, such as the pressure roller 12 and the peeling portion 24, can be rotated in accordance with the movement of the substrate 1. By using a lightweight material such as carbon fiber as a constituent material for the rotatable roller, transfer accuracy and production efficiency can be improved.
When the rotatable roller is employed, the traveling of the foil 10 can be stabilized and the generation of wrinkles can be suppressed.
Moreover, you may comprise so that the press roller 12 grade | etc., Can be independently rotated as needed.

Next, a method for transferring the foil 10 onto the substrate 1 using this foil transfer device will be described in detail.
As shown in FIG. 1, the base material 1 fed out from the base material supply roller 34 is sent to the printing units 3a and 3b by intermittent operation of the base material feed rollers 2a and 2b. An adhesive is applied by printing on the large-diameter portion 7a of any one of the blanket cylinders 7.

  The substrate 1 travels in the forward direction (rightward in FIG. 1) while being coated with a UV adhesive so as to have a desired shape by the large-diameter portion 7a, and stops or reverses in a state facing the small-diameter portion 7b. Run. As a result, the UV adhesive is applied to the substrate 1 by printing without causing a large blank.

A loop forming roller 36 is provided further upstream of the upstream side substrate feed roller 2a, and a loop portion R3 is formed between the rollers 2a and 36.
Similarly, a loop forming roller 38 is provided further downstream of the downstream-side base material feed roller 2b, and a loop portion R4 is formed between the rollers 2b and 38.
The slack produced by the intermittent feeding is absorbed in the loop portions R3 and R4.

The foil 10 is fed from the foil supply roller 14, passes through the loop forming unit 20, is intermittently fed by the foil feed roller 18 together with the support (not shown) in synchronization with the travel of the substrate 1, and is supplied to the pressure roller 12. Then, it is superimposed on the base material 1 with the presser roller 23.
In the loop forming unit 20, when the length of the loop portion R1 falls below a predetermined range, the loop control unit 17 increases the rotation speed of the loop forming roller 15, and when the length of the loop portion R1 exceeds the predetermined range. In addition, since the rotation speed of the loop forming roller 15 is lowered, the length of the loop portion R1 is maintained within a predetermined range.
The loop portion R1 is sucked into the main body portion 22a of the loop housing portion 22 by the exhaust fan 22b, and the posture is stably maintained.

As described above, the foil 10 is intermittently fed by the foil feeding roller 18, but the loop forming portion 20 always ensures a stable loop portion R 1 of a predetermined length, so that an excessive tensile force is applied to the foil 10. Or excessive slack does not occur.
Even when there is a difference between the feeding speed by the foil feeding roller 18 and the feeding speed by the loop forming roller 15, this difference is absorbed by the loop portion R1.

The overlapped substrate 1 and foil 10 are irradiated with UV at the UV irradiation unit 21, and the foil 10 adheres to the adhesive-applied portion of the substrate 1 by curing of the adhesive.
The portion of the foil 10 other than the adhesive-applied portion is pulled by the foil feed roller 25 and peeled from the substrate 1 together with the support (not shown) at the peeling portion 24.
As a result, the foil 10 remains only in the adhesive-applied portion, so that the foil 10 having the same shape as that of the adhesive-applied portion is transferred to the substrate 1.

The foil 10 is intermittently fed in synchronism with the travel of the base material 1 by the foil feed roller 25, and taken up by the take-up roller 31 through the loop forming unit 30.
In the loop forming unit 30, when the length of the loop portion R2 falls below a predetermined range, the loop control unit 28 increases the rotation speed of the loop forming roller 26, and when the length of the loop portion R2 exceeds the predetermined range. In addition, since the rotation speed of the loop forming roller 26 is lowered, the length of the loop portion R2 is maintained within a predetermined range.
The loop portion R2 is sucked into the main body portion 32a of the loop housing portion 32 by the exhaust fan 32b, and the posture is stably maintained.

As described above, the foil 10 is intermittently fed by the foil feeding roller 25, but since the loop portion R1 having a predetermined length is always stably secured by the loop forming portion 20, an excessive tensile force is applied to the foil 10. Or excessive slack does not occur.
Even when there is a difference between the feeding speed by the foil feeding roller 25 and the feeding speed by the loop forming roller 26, this difference is absorbed by the loop portion R2.

  The base material 1 with the foil 10 adhered to the adhesive application portion is taken up by the base material feed roller 2b, and taken up by the base material take-up roller 35 through the loop portion R4.

In the above foil transfer device, the foil supply unit 11 includes the loop forming unit 20 that sags the foil 10 in a loop shape to form the loop unit R1, so that excessive tension is applied to the foil 10 when the foil 10 is intermittently fed. No force is applied or excessive sag occurs.
For this reason, the traveling of the foil 10 is stabilized, the generation of wrinkles is prevented, and a highly accurate transfer process is possible.

Further, according to the foil transfer apparatus, since the substrate 1 can be intermittently fed, the printing size can be changed without replacing the plate cylinder 6 or the like in the printing units 3a and 3b. Therefore, it is possible to cope with the production of various small-quantity products, which is advantageous in terms of cost. Further, since it is not necessary to replace the plate cylinder 6 or the like, it is possible to reduce a burden caused by replacement work or maintenance work.
Moreover, since the foil 10 is adhered to the base material 1 with an adhesive, the safety of the operation can be improved as compared with the foil pressing process that requires heating.

The foil supply unit 11 can also be configured to supply a plurality of foils 10.
In the foil supply unit 11 shown in FIG. 3, two foils 10A and 10B having different positions in the axial direction of the rollers 15 and 18 can be simultaneously supplied.
In the illustrated example, the loop accommodating portion 22 includes two outer partition plates 41 and 41 disposed in the main body portion 22a at intervals in the roller axis direction, and two inner partition plates disposed therebetween. Plates 42 and 42 are provided.
The outer partition plate 41 is preferably formed to a length that reaches the bottom of the main body 22a or the vicinity thereof. The inner partition plate 42 is preferably spaced at the lower end from the bottom of the main body 22a. Accordingly, the entire space between the outer partition plates 41 and 41 can be efficiently exhausted by the exhaust part 22b.
The first foil 10A can be disposed between one outer partition plate 41 and one inner partition plate 42, and the second foil 10B can be disposed between the other outer partition plate 41 and the other inner partition plate 42. it can.
The partition plates 41 and 42 can determine the position in the roller axial direction in accordance with the width of the foils 10A and 10B (L1 in the illustrated example), and can be arranged so as to prevent the displacement of the foils 10A and 10B.
Since the partition plates 41 and 42 can change positions in the roller axis direction, they can correspond to the foil 10 having an arbitrary width.

According to the foil supply unit 11 having the above configuration, the plurality of foils 10 </ b> A and 10 </ b> B can be transferred to the base material 1. For example, the foils 10 </ b> A and 10 </ b> B can be transferred only to both side edges of the substrate 1. For this reason, foil 10 can be used efficiently and cost can be controlled.
In the foil supply part 11 having the above-described configuration, a third foil can be disposed between the two inner partition plates 42 and 42. By increasing the number of partition plates, four or more foils can be supplied.
Note that the above-described configuration can also be adopted for the loop accommodating portion 32 of the foil collecting portion 13.

The foil transfer apparatus of the present invention can also be used as a laminating apparatus.
Referring to FIG. 1, a laminate material 10 is used instead of the foil 10, the adhesive is printed on the base material 1 by the printing units 3 a and 3 b, and the laminate material 10 is supported by the supply unit 11 (release paper). And can be pressure-bonded to the base material 1 by the pressure roller 12.
The support (release paper) can be separated and collected from the laminate material 10 in the collection unit 13, but is not separated from the laminate material 10 and sent as it is to the next step (for example, winding by the take-up roller 35). You can also.
Even when used as a laminating apparatus, traveling of the laminating material 10 can be stabilized, wrinkles can be prevented, and highly accurate laminating can be performed.

It is a schematic block diagram which shows one Embodiment of the foil transcription | transfer apparatus which concerns on this invention. It is a schematic block diagram which shows the printing unit of the foil transcription | transfer apparatus shown in FIG. It is a perspective view which shows typically the structural example of a foil supply part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base material, 2a, 2b ... Base material feed roller, 3a, 3b ... Printing unit, 4 ... Foil transfer part, 11 ... Foil supply part, 12 ... Pressure roller ( Contact part), 13 ... foil recovery part, 15 ... loop forming roller, 16 ... loop sensor, 17 ... loop control part, 18 ... foil feeding roller, 20 ... loop forming Part, 22 ... loop housing part, 22a ... main body part, 22b ... exhaust fan (exhaust part), 25 ... foil feed roller, 30 ... loop forming part, R1, R2 ... Loop part.

Claims (6)

A substrate feeding means (2a, 2b) for intermittently feeding the substrate (1), a printing unit (3a, 3b) for printing an adhesive on the substrate, and a foil (10) on the substrate for adhesion A foil transfer part (4) for transferring the foil to the agent application part,
The foil transfer part includes a foil supply part (11) for supplying the foil, an abutting part (12) for bringing the foil into contact with the base material, and a foil other than the adhesive-applied part as a base material. And a foil recovery section (13) for separating and recovering from
The foil supply unit is a foil that intermittently feeds the foil that has passed through the loop forming unit in synchronization with the base material, and a loop forming unit (20) that loops the foil in a loop shape to form a loop unit (R1). A foil transfer device comprising a feed roller (18). The loop forming section includes a loop forming roller (15) for feeding and moving the foil,
A loop sensor (16) for detecting the length of the loop portion;
The foil transfer device according to claim 1, further comprising a loop control unit (17) for controlling a rotation speed of the loop forming roller based on a length of the loop portion detected by the loop sensor. The foil supply unit includes a loop accommodating portion (22) for accommodating the loop portion,
The loop housing portion is formed in a box shape and a main body portion (22a) for housing the loop portion,
3. The foil transfer device according to claim 1, further comprising an exhaust part (22 b) that decompresses the inside of the main body part and sucks the loop part in a hanging direction. 4. The foil recovery unit is a foil feed roller (25) that intermittently feeds the foil peeled from the base material in synchronization with the base material;
The loop formation part (30) which makes the loop part (R2) slack the foil which passed through this foil feed roller in a loop shape, It has any one of Claims 1-3 characterized by the above-mentioned. Foil transfer device.   The foil transfer device according to claim 1, wherein the pressure-sensitive adhesive is an ultraviolet curable pressure-sensitive adhesive.   The ultraviolet irradiation part (21) which irradiates an ultraviolet-ray to the said adhesive and raises the adhesiveness between the said contact part and the said foil collection | recovery part is provided. Foil transfer device.

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