JP3197367B2 - Print Laminator Coating Equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating device for a print laminator which is used for bonding a film and a printed material with an adhesive therebetween.

[0002]

2. Description of the Related Art In order to finish a beautiful product with a print laminator for laminating a printed matter and a web-like film, it is required to apply an adhesive uniformly and smoothly to the film.

[0003] Conventional coating devices for a print laminator are shown in Figs. A print laminator coating device (hereinafter simply referred to as a coating device) 50 shown in FIG. 7 presses a metal coating roll 53 immersed in an adhesive 52 in an adhesive tray 51 and a rubber transfer roll 54 into pressure. Film 57 hung on two kiss touch rolls 55, 56
The adhesive 52 is applied to the film 57 by rotating the film 57 and each of the rolls 53, 54, 55, 56 in the direction of the arrow in FIG. However, in this coating device 50, a roll is formed on the coating film formed on the surface of the coating roll 53, and the roll is transferred as it is onto the film 57. Is coming.

A coating device 50a shown in FIG. 8 is a kiss-touch reverse coater. The coating roll 53 and the Koki roll 58 are both made of metal, and a doctor blade 59 is brought into contact with the Koki roll 58 to form a film 57 and the rolls 53 and 55. , 56 and 58 in FIG.
Is rotated in the direction of the arrow, and the adhesive 52 that has adhered to the Koki roll 58 is scraped off by the doctor blade 59. Further, there is a gap between the application roll 53 and the Koki roll 58 for adjusting the amount of application. The extra adhesive 52 that has adhered to the application roll 53 is scraped off by a roll roll 58, and the adhesive 52 is applied onto the film 57. Also, a coating device shown in FIG.
50b uses a stationary roll-shaped doctor blade 60 instead of the koki roll 58 in FIG.

The above-mentioned coating devices 50a and 50b are suitable for applying a solvent-type or water-soluble (alcohol) type adhesive, but are coated with an emulsion-type aqueous adhesive on the film 57 due to environmental requirements. Then, a scratch-like streak occurs on the application surface. The scratch-like streaks break when the emulsion-like particles of the water-based adhesive come into contact with air, and the emulsion-like particles adhere to each other and solidify, and become large and become like dust. Is clogged between the application roll 53 and the koki roll 58.

Under these circumstances, coating apparatuses 50c and 50d shown in FIGS. 10 and 11 can be used with an emulsion-type aqueous adhesive. The coating device 50c includes a coating roll 53
And the roll roll 58 are both made of metal, and the transfer roll 54 is made of rubber. The application roll 53 and the transfer roll 54 are pressed against each other, and the transfer roll 54 and the roll roll 58 are also pressed against each other. Film 57
And, by rotating each of the rolls 53, 54, 55, 56, 58 in the direction of the arrow in FIG. 10, the rotation speed of the koki roll 58 is extremely lower than the rotation speed of the transfer roll 54, so that the surface of the transfer roll 54 The coating film formed on the transfer roll 54 is transferred so as to be placed on the coating roll 53. The peripheral speed ratio between the rolls, which are generally considered as good application conditions by this mechanism, is 100 for the application roll 53, 200 for the transfer roll 54, and 10 for the koki roll 58. Further, in the coating device 50c, all the rolls 53, 54 and 58 are pressed against each other, and there is no gap between the rolls. Does not occur.

[0007] The coating device 50 d is the same as the coating device 50 described above except that the coating roll 53 is immersed in the adhesive tray 51.
Similar to c, the function is almost the same.

[0008]

However, although the above-mentioned coating apparatuses 50c and 50d cannot form a scratch-like streak, the rolls are not completely eliminated. Further, if the peripheral speed ratio of each of the rolls 53, 54, 58 is large, for example, if the line speed, that is, the speed of the film 57 is 50 m / min,
The peripheral speed of the application roll 53 is 60 m / min or more, the peripheral speed of the transfer roll 54 is 120 m / min or more, and when the line speed is rotated at high speed, the adhesive 52 in the adhesive tray 51 is stirred very quickly, Inconveniences such as easy generation of bubbles and easy ejection of the adhesive from the surfaces of the rolls 53 and 54 occur.

In view of the above, the present invention has been made in view of the above circumstances, and it is possible to apply an emulsion-based aqueous adhesive to a film smoothly without scratch-like streaks or roll streaks, and to improve the accuracy of each roll. It is an object of the present invention to provide a coating apparatus for a print laminator which can form a uniform coating film even if not so much and can easily cope with an increase in film speed.

[0010]

Means for Solving the Problems In order to solve the above problems, a printing laminator coating device of the present invention is a printing laminator coating device for applying an adhesive to a film and bonding the film to a printed material, and comprising a film backup. An application roll is brought into contact with the roll via a film, a transfer roll having elasticity is brought into pressure contact with the application roll, a koki roll provided with a spiral groove is brought into pressure contact with the transfer roll, and a doctor blade is brought into contact with the koki roll. And making the rolls rotate in the same direction, and satisfying a condition that the running speed of the film <the peripheral speed of the coating roll <the peripheral speed of the transfer roll <the peripheral speed of the koki roll,
It is characterized in that at least the koki roll among these rolls is immersed in an adhesive in an adhesive tray, and two kiss-touch rolls are provided in place of the backup roll, and a film is applied to the application roll. It is preferable that only the contact is made, and that the rotation ratio of the coating roll, the transfer roll and the roll is variable, and further,
Of the two kiss-touch rolls, a kiss-touch roll on the downstream side in the running direction of the film is preferably used as a drive roll.

[0011]

According to the printing laminator coating apparatus having the above-mentioned structure, the adhesive attached to the entire peripheral surface of the koki roll is scraped by the doctor blade by the rotation of the koki roll dipped in the adhesive in the adhesive tray. The adhesive is left only in the spiral groove and the adhesive roll remains in the opposite direction at the contact point between the roll and the transfer roll, and the circumferential speed of the roll is faster than the circumferential speed of the transfer roll. Is smoothly transferred as if it were placed on the transfer roll, and the adhesive on the transfer roll is transferred onto the application roll under the same conditions as described above. Further, the adhesive on the application roll is transferred onto the film under the same conditions.

When a film is hung on two kiss touch rolls, the application roll contacts only the film,
The adhesive is not applied to the backup roll or the like even if the film width is changed and the application roll is not replaced.

If the rotation ratio of the coating roll, the transfer roll and the roll is variable, the amount of the adhesive applied on the film can be changed, and the required amount of adhesive can be obtained without increasing the tension of the film too much. Can be applied on the film.

Further, when the kiss touch roll on the downstream side in the running direction of the film among the two kiss touch rolls is the drive roll, the tension of the film can be increased by driving the kiss touch roll on the downstream side. By increasing the tension of the film, the pressure between the film and the application roll can be increased to apply the adhesive evenly on the film, and the film after application returns to the original tension.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a side view showing a print laminator to which the coating device of the present invention is mounted, FIG. 2 is a side view showing a coating device of the print laminator of the present invention, and FIG. 3 is a side view of a roll. In the figure, reference numeral 1 denotes a print laminator corresponding to a sheet-fed printed material. In the print laminator 1, a thin film 2 of 10 to 100 μm is coated with an adhesive by a print laminator coating device (hereinafter simply referred to as a coating device) 3. After the solvent contained in the adhesive is removed in the drying unit 4, the film 2 is bonded to a sheet-fed printed material (printed material) 6 sent from a paper feeder 5 by a hot roll unit 7. Then, only the film 2 is cut by the cutter unit 8 and is again stacked on the sheet discharging device 9 as a sheet-fed printed material 6a after print lamination.

The coating device 3 is connected to a backup roll 20 of the film 2 through the coating roll via the film 2.
The transfer roll 22 having elasticity is pressed against the coating roll 21, the koki roll 24 having a spiral groove 23 is pressed against the transfer roll 22, and the doctor blade 25 is further pressed against the koki roll 24. Contact, and each roll 20, 21, 2
2 and 24 are rotated in the same direction, and the following conditions are satisfied: traveling speed of the film 2 <peripheral speed of the coating roll 21 <peripheral speed of the transfer roll 22 <peripheral speed of the heel roll 24.
At least Koki roll 24 out of 21, 22, 24
26 is immersed in an adhesive 27.

The coating roll 21 is made of metal, and the koki roll 24 is made of metal or ceramic. The transfer roll 22 is made of rubber, and the coating roll 21 and the koki roll 24 are pressed against the transfer roll 22. Therefore, the rolls 21, 22, and 24 may have low processing accuracy.
For example, when adjusting the amount of adhesive to be applied according to the gap between rolls as in the past, 1/1000 mm (mm)
However, in the case of the present invention, an accuracy of about 3/100 millimeter (mm) may be used.

The koki roll 24 has a spiral groove 23.
Is engraved so that the adhesive 27 accumulates in the spiral groove 23. Further, the doctor blade 25 is in elastic contact with the koki roll 24. In this embodiment, the Koki roll 24 and the transfer roll 22 are immersed in the adhesive 27 in the adhesive receiving tray 26.

The coating roll 21, the transfer roll
The rotation speed of the roll 22 and the roll 24 is variable, and the rotation ratio of the rolls 21, 22, and 24 can be changed.

Next, the operation of the coating device 1 for a print laminator having the above configuration will be described. First, the film 2 is sent from the film stock shown in FIG. 1 to the backup roll 20 of the coating apparatus 3. On the other hand, when each of the rolls 21, 22, and 24 of the coating device 3 rotates as shown in FIG. 2, the adhesive 27 of the adhesive receiving tray 26, for example, a solvent-type or water-soluble (alcohol) -type adhesive, The adhesive 27 adheres to the entire surface of the KOKIROL 24 immersed in the adhesive, and comes up and is scraped off by the doctor blade 25 having elasticity and in contact with the KOKIROL 24. Only the adhesive 27 remains. Since the roll 24 and the transfer roll 22 are rotating in the same direction,
In the case of these pressure contacts, the movement is in the opposite direction, and the spiral groove 23
The adhesive 27 is transferred in such a state as to be placed on the transfer roll 22. At this time, the transfer roll 22 and the koki roll 24
When the peripheral speed is the same, the spiral adhesive 27 is transferred onto the transfer roll 22, and if the peripheral speed of the roll 24 is lower than that of the transfer roll 22, the adhesive 27 is cut off and the transfer cannot be performed cleanly. When the rotation of the roll 24 is faster than the rotation of the transfer roll 22, the coating surface of the adhesive 27 transferred onto the transfer roll 22 becomes smooth. Then, since the transfer roll 22 and the application roll 21 are also rotating in the same direction, these pressure contacts are moved in opposite directions, and from the same contents as described above, the peripheral speed of the transfer roll 22 is larger than that of the application roll 21. If the condition is faster than the peripheral speed of
27 is transferred onto the application roll 21. Further, the adhesive 27 on the application roll 21 is transferred onto the film 2 sent out on the backup roll 20 described above. That is, the application roll 21 is connected to the backup roll 20 via the film 2.
The application roller 21 and the film 2 (the rotation of the backup roller 20 and the application roller 21 rotate in the same direction) in the opposite direction, and the peripheral speed of the application roller 21 is smaller than that of the film 2. , The adhesive 27 on the application roll 21 is transferred onto the film 2.
At this time, if the speed ratio of the traveling speed of the film 2, the peripheral speed of the coating roll 21, the peripheral speed of the transfer roll 22, and the peripheral speed of the hand roll 24 is constant, the spiral groove 23 of the present invention is provided. By using the Koki roll 24 and the doctor blade 25, a fixed amount of coating film can be obtained. Further, the amount of application can be changed by changing the peripheral speed of the transfer roll 22 or the koki roll 24. The adhesive 27 on the application roll that has passed without being applied to the film 2 is transferred to the adhesive receiving tray 26 via the transfer roll 22.
Return to

The film 2 to which the adhesive 27 has been applied by the above-mentioned coating device 3 is subjected to removal of the solvent contained in the adhesive 27 in the drying section 4 and is sent to the film 2 from the paper feeder 5. The coming sheet-fed prints 6 are bonded together by a heat roll unit 7,
Only the film 2 is cut by the cutter unit 8 and is stacked on the sheet discharge device 9 as a sheet-fed printed material 6a after the print laminator to be a product.

FIG. 4 shows another embodiment of the present invention.
The difference between the coating device 3a and the embodiment shown in FIGS. 1 to 3 is that two kiss-touch rolls 30 and 31 are provided instead of the backup roll 20, and only the film 2 is brought into contact with the coating roll 21, Even if the width of the film 2 changes, the application roll 21 does not need to be changed each time, and the kiss-touch roll 31 on the downstream side in the running direction of the film 2 is used as a drive roll. The contact pressure between the application roll 21 and the film 2 is determined by the tension of the film 2. The larger the tension, the more the applied surface of the adhesive 27 is not cut, and the adhesive having a high viscosity can be applied on the film 2. The aforementioned kiss touch roll
By driving the film 31, it is possible to easily obtain a larger film tension. Further, the film 2 after passing through the kiss-touch roll 31 easily returns to almost the original tension, and the subsequent curl phenomenon hardly occurs. Further, as a method of increasing the tension of the film 2, it can also be realized by increasing the peripheral speed of the application roll 21. In this case, if the tension of the film 2 is too strong, the tension is also increased during lamination with a sheet-fed printed material. As a result, curling occurs in the bonded products. Therefore, the peripheral speed of the application roll 21 cannot be set to be much higher than the traveling speed of the film 2. Since other configurations and operations are the same as those of the embodiment of FIGS. 1 to 3, the reference numerals are attached to the drawings and the description is omitted.

FIG. 5 shows another embodiment of the present invention.
The difference between the coating apparatus 3b and the embodiment shown in FIG. 4 is that the diameter of the kiss touch roll 31 is small, and the kiss touch roll 31 rotates in a free state without being driven. Other configurations and operations are the same as those in the embodiment of FIG. 4, and therefore, reference numerals are attached to the drawings, and description thereof will be omitted.

FIG. 6 shows another embodiment of the present invention.
The difference between the application device 3c and the embodiment shown in FIG. 5 is that the application roll 21 is immersed in the adhesive 27 in the adhesive tray 26. Other configurations and operations are the same as those in the embodiment of FIG. 5, and therefore, reference numerals are attached to the drawings, and description thereof will be omitted.

In the embodiment, the case where the web-like film 2 is laminated on the sheet-fed printed matter 6 is described. However, the present invention is not limited to this, and there is no problem even if the web-like film 2 is laminated on the web-like printed matter. Absent.

[0026]

As described above in detail, according to the printing laminator coating apparatus of the present invention, by rotating the koki roll immersed in the adhesive in the adhesive pan, the koki roll is attached to the entire circumference of the koki roll. The coming adhesive is scraped off by the doctor blade, the adhesive remains only in the spiral groove, the koki roll and the transfer roll move in opposite directions at the point of contact, and the peripheral speed of the koki roll is faster than the peripheral speed of the transfer roll Thus, the adhesive in the spiral groove of the koki roll is smoothly transferred while being placed on the transfer roll, and the adhesive on the transfer roll is transferred onto the application roll under the same conditions as described above. Further, the adhesive on the application roll is transferred onto the film under the same conditions. Therefore, according to the present invention, it is possible to obtain a uniform and smooth coated surface without scratches or rolls, even if the adhesive is a conventionally used adhesive or an emulsion-based aqueous adhesive. In addition, since the application amount adjustment can be performed by changing the depth of the spiral groove and the rotation speed without performing the adjustment in the gap, the accuracy of each roll is hardly required,
Moreover, a uniform coating film can be formed. In addition, it can be adapted even when the line speed increases.

When the film is hung on the two kiss touch rolls, in addition to the above-mentioned effects, the application roll comes into contact only with the film, and even if the width of the film changes or the application roll is not changed, There is an effect that an adhesive is not applied to a backup roll or the like.

Further, if the rotation ratio of the coating roll, the transfer roll and the roll is variable, the amount of the adhesive applied on the film can be freely changed, and the required amount of the adhesive can be reduced without increasing the tension of the film too much. There is an effect that the adhesive can be applied on the film.

Further, when the kiss touch roll on the downstream side in the running direction of the film among the two kiss touch rolls is used as the drive roll, the tension of the film can be increased by driving the kiss touch roll on the downstream side. By increasing the tension of the film, the pressure between the film and the application roll can be increased, and a low-viscosity to high-viscosity adhesive can be freely applied on the film, and the applied film returns to almost the original tension.

[Brief description of the drawings]

FIG. 1 is a side view showing a print laminator to which a coating device of the present invention is mounted.

FIG. 2 is a side view showing a coating device of the print laminator of the present invention.

FIG. 3 is a side view of a koki roll.

FIG. 4 is a side view of a coating device for a print laminator showing another embodiment of the present invention.

FIG. 5 is a side view of a print laminator coating apparatus according to another embodiment of the present invention.

FIG. 6 is a side view of a coating device for a print laminator showing another embodiment of the present invention.

FIG. 7 is a side view showing a conventional print laminator coating apparatus.

FIG. 8 is a side view showing a coating device of a conventional print laminator.

FIG. 9 is a side view showing a coating device of a conventional print laminator.

FIG. 10 is a side view showing a coating device of a conventional print laminator.

FIG. 11 is a side view showing a conventional coating apparatus for a print laminator.

[Explanation of symbols]

1,50 print laminator 2,57 film 3,3a, 3b, 3c, 50,50a, 50b, 50c, 50d
Print Laminator Coating Equipment 6 Sheet-fed Printed Material (Printed Material) 20 Backup Roll 21, 53 Coating Roll 22, 54 Transfer Roll 23 Spiral Groove 24, 58 Koki Roll 25, 59, 60 Doctor Blade 26, 51 Adhesive Dish 27, 52 Adhesion Agents 30, 31, 55, 56 Kiss Touch Roll

────────────────────────────────────────────────── ─── Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B05C 1/08-1/12 B05D 1 / 28,7 / 00 B29C 65/52 D21H 23/58 B29L 9: 00

Claims (4)

(57) [Claims] 1. A coating device for a print laminator for applying an adhesive to a film and bonding the film to a printed material, wherein the coating roll is brought into contact with a backup roll of the film via a film, and the coating roll has elasticity. The transfer roll is pressed, the transfer roll is pressed against a koki roll provided with a spiral groove, a doctor blade is brought into contact with the koki roll, and each roll is rotated in the same direction. A print laminator characterized by satisfying a condition of a peripheral speed of a roll <a peripheral speed of the transfer roll <a peripheral speed of the koki roll, wherein at least the koki roll of each of the rolls is immersed in an adhesive in an adhesive tray. Coating equipment. 2. The coating device for a print laminator according to claim 1, wherein two kiss-touch rolls are provided in place of said backup roll, and only the film is brought into contact with the coating roll. 3. The coating apparatus for a print laminator according to claim 1, wherein the rotation ratio of the coating roll, the transfer roll, and the roll is variable. 4. The coating device for a print laminator according to claim 2, wherein, of the two kiss-touch rolls, a kiss-touch roll located downstream of the running direction of the film is used as a driving roll.