KR20070037992A - Forming apparatus and forming method of adhesive sheet - Google Patents

Abstract

A first die cutting device 15 for forming the adhesive sheet S by forming the outer cutout groove 11 and the inner cutout groove 12 from the sheet FS side with respect to the raw material sheet L, and the inner cutout. It is surrounded by the 2nd die cutting device 17 which forms the notch notch 16 for drawing in the inside of the notch 12 from the peeling sheet PS side, and the inner notch groove 12 and the notch notch 16 for pulling out. The removal apparatus 18 which removes the wrapped raw material sheet part as an unnecessary sheet part S1 is provided.

Raw material sheet, sheet, cut groove, adhesion, sheet, die, cutting, drawing, removing, peeling

Description

Adhesion sheet forming apparatus and forming method {FORMING APPARATUS AND FORMING METHOD OF ADHESIVE SHEET}

1 is a schematic front view of an adhesive sheet forming apparatus according to the present embodiment;

Fig. 2 (A) is a schematic perspective view of the device, and Fig. 2 (B) is a plan view of a main portion showing the planar shape of each cutout groove,

3 is a cross-sectional view showing a state in which the outer notch groove and the inner notch groove are formed in the raw material sheet in the die cutting device;

4 is an enlarged view of a portion A of FIG. 3;

5 is a cross-sectional view showing a state in which a notch for drawing is formed in the second die cutting roller;

6 is an enlarged view of a portion B of FIG. 5;

7 is a schematic front view similar to FIG. 1 showing a modification;

8 is a schematic front view similar to FIG. 1 showing still another modification;

9 is a sectional view similar to FIG. 3 showing a conventional example;

10 is an enlarged view of part C of FIG. 9;

11 is a cross-sectional view for explaining a conventional problem when peeling a release sheet;

12 is a cross-sectional view for explaining a conventional problem when peeling the sheet from the adhesive layer.

The present invention relates to an adhesive sheet forming apparatus and a method for forming the adhesive sheet, and particularly, by forming a notch groove in a strip-shaped raw material sheet in which a sheet is pre-bonded with an adhesive layer interposed therebetween to form an adhesive sheet, The present invention relates to an adhesive sheet forming apparatus and a forming method capable of preventing the occurrence of debris of the sheet material and the phenomenon of stretching like a thread of the adhesive layer along the edge of the notched groove when the sheet is peeled off.

Conventionally, an optical disk capable of reading and writing a high capacity of information has one side thereof configured as a recording layer. This recording layer is formed on, for example, a UV-curable adhesive layer by using a plate called a stamper to form an unevenness (feet) that serves as a read signal or a groove (groove) for guiding laser light. Processing is taking place.

9 to 10 show an adhesive sheet forming apparatus in a step before laminating the adhesive layer on the optical disk. In the drawing, the adhesive sheet forming apparatus includes a raw material sheet L which is continuous in a band shape in which the sheet FS is pre-bonded with the release sheet PS interposed therebetween with an ultraviolet curable adhesive layer A. The outer cutting groove 55 is formed by using a die cutting roller 53 having an outer cutting blade 51 and an inner cutting blade 52 in the form of a closed loop and an anvil roller 54 opposed thereto. And an inner cutout groove 56 in the raw material sheet L to form the adhesive sheet S. FIG.

After the region enclosed by the inner cutout groove 56, that is, the central region is recovered through an appropriate recovery apparatus as an unnecessary sheet portion S1, the adhesive sheet S is peeled off as shown in FIG. 11. The peeling sheet PS is peeled off at the end position of). As shown in Fig. 12, the adhesive sheet S is peeled off the sheet FS after being pasted to the optical disk D on the table T, and is thus shown on the surface of the adhesive layer A that is exposed. The recording layer is formed by forming pits and grooves through the unstamped stamper.

However, in this structure, since the inner cutting edge 52 is set to the blade height which contact | connects the anvil roller 54, as shown in FIG. 10, the cutting edge sharpness of the inner cutting edge 52 declines with time. There is a problem.

Since the lowering of the sharpness of the inner cutting blade 52 causes a decrease in the cutting accuracy, as shown in Figs. 11 and 12, the inner cutting is performed when the peeling sheet PS is peeled off or when the sheet FS is peeled off. The adhesive layer A is stretched from the edge of the grain groove 56 to cause the phenomenon of elongation, such as a so-called thread, which becomes a beard shape, or the debris of the sheet FS. In such a state that the stretched or debris is attached on the adhesive layer A, even if the stamper forming a very fine groove is pressed, a part or a groove cannot be formed in a part.

By the way, Patent Document 1 discloses a bonding apparatus for attaching a protective sheet to an optical disk. The apparatus is provided with a die cutting apparatus using the above-described die cutting roller and anvil roller, and a configuration including a recovery device for blowing air to the inner region of the inner cutout groove and recovering it.

Patent Document 1: Japanese Patent Laid-Open No. 2004-134020

However, in the case of the die cutting device disclosed in Patent Document 1, since the cutting blades forming the inner cutout grooves have the blade heights in contact with the anvil roller, the countermeasure against the phenomenon of elongation or the occurrence of the sheet debris as described above is It is not taken.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to prevent damage of cutting blades, to avoid the phenomenon of elongation or debris from the edges of the notched grooves, and to entangle them in the adhesive near the notched groove edges. It is providing the adhesive sheet forming apparatus and the formation method which can prevent sticking.

In order to achieve the above object, the present invention is directed to a strip-like raw material sheet of at least three-layer structure in which the sheet is pre-bonded with an adhesive layer interposed therebetween, wherein the release sheet is along the trajectory of the closed loop from the sheet side. A first die cutting device which forms an outer cutout groove and an inner cutout groove each leading up to to form an adhesive sheet having a predetermined planar shape, and along the trajectory of the closed loop from the release sheet side inside the inner cutout groove; A second die cutting device for forming a cutout groove leading to the adhesive layer, a sheet portion surrounded by the inner cutout groove, an adhesive layer portion, and a release sheet portion surrounded by the pullout cutout portion as unnecessary sheet portions; The structure provided with the removal apparatus mentioned above is employ | adopted.

In the present invention, the first die cutting device is disposed along the traveling direction of the raw material sheet, and the second die cutting device is disposed upstream or downstream of the traveling direction with respect to the first die cutting device. It is.

The first die cutting device and the second die cutting device may be disposed at symmetrical positions with the raw sheet interposed therebetween.

Moreover, the said removal apparatus is comprised by the extrusion apparatus which can advance and retract in the direction which pushes the said unnecessary sheet part from the said peeling sheet side, and the collection | recovery apparatus which sucks out the unnecessary sheet part pushed out.

In addition, the removal device includes a pin installed on the outer peripheral surface portion of the rotary shaft disposed on the release sheet side and protruding in the radial direction of the rotary shaft and the retrieval device disposed on the sheet side, by pushing the unnecessary sheet portion with the pin It is possible to adopt a configuration in which the unnecessary sheet portion is sucked out by the recovery device.

In addition, the present invention is directed to a strip-shaped raw material sheet of at least three-layer structure in which the sheet is pre-bonded with the adhesive layer interposed therebetween, and a cutout groove is formed along the trajectory of the closed loop from the sheet side to a predetermined plane. In the method of forming an adhesive sheet having a shape, an outer cutout groove and an inner cutout groove extending from the sheet side to the release sheet are formed to form a planar shape of the adhesive sheet, and then the inner side from the release sheet side. A drawing cutout groove formed in the cutout groove reaching the adhesive layer along the trajectory of the closed loop, and then a sheet portion and an adhesive layer portion surrounded by the inner cutout groove and a peeling sheet surrounded by the cutout groove. The method of pushing out and removing a part as an unnecessary sheet part is employ | adopted.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings.

1, the schematic front view of the adhesive sheet forming apparatus which concerns on this embodiment is shown, and the schematic perspective view is shown in FIG. On the other hand, the thickness of the raw material sheet and the height of the cutting edge is shown to facilitate the understanding of the content. 1 and 2, the adhesive sheet forming apparatus includes a strip-shaped raw material sheet L having a three-layer structure in which a sheet FS is pre-bonded with an ultraviolet curable adhesive layer A interposed therebetween. It is targeted. The adhesive sheet forming apparatus forms an outer cutout groove 11 and an inner cutout groove 12 extending from the sheet FS side to the release sheet PS along the trajectory of the closed loop to form a predetermined planar shape. It is arrange | positioned in the advancing direction downstream of the 1st die cutting apparatus 15 which forms the adhesive sheet S, and the raw material sheet L, and the said peeling sheet PS inside the said inner notch groove 12. A second die cutting device 17 for forming a cutout groove 16 (see FIG. 6) extending from the side to the adhesive layer A along the trajectory of the closed loop, and the inner cutout groove 12. And a removal apparatus 18 for removing the peeling sheet portion PS1 surrounded by the wrapped sheet portion FS1 and the adhesive layer portion A1 and the cutout groove 16 for drawing as unnecessary sheet portion S1. It is.

The first die cutting device 15 is a raw material between the first die cutting roller 20 located on the sheet FS side and the first die cutting roller 20 located on the release sheet PS side. It consists of the anvil roller 21 which pinches the sheet | seat L. As shown in FIG. The first die cutting roller 20 corresponds to a planar shape of the optical disk, and has an outer cutting blade 22 and an inner cutting groove 12 forming an outer cut groove 11 in the form of a closed loop. 23 is formed in the outer peripheral surface. The heights of these outer cutting blades 22 and inner cutting blades 23 are such that they can form cutout grooves having a depth reaching the release sheet PS, and the so-called half cuts are made of a raw material sheet without being in contact with the anvil roller 21. It is formed in (L).

The second die cutting device 17 is a raw material between the second die cutting roller 25 located on the release sheet PS side and the second die cutting roller 25 located on the sheet FS side. It consists of the anvil roller 26 which pinches the sheet | seat L. As shown in FIG. The 2nd die cutting roller 25 is comprised by the outer peripheral surface with the pull blade 27 which forms the cut-out notch 16 for a closed loop form inside the said inner notch groove 12. As shown in FIG. The blade height of this pull blade 27 becomes a height which can form the notch groove of the depth reaching the adhesive bond layer A, and a so-called half cut is carried out from the peeling sheet PS side without contacting the anvil roller 26. It is made to form in the sheet | seat L.

The said removal apparatus 18 is arrange | positioned downstream of the said 2nd die cutting apparatus 17 in the advancing direction of the raw material sheet L. As shown in FIG. This removal apparatus 18 is provided with the extrusion apparatus 28 which pushes the said unnecessary sheet part S1 upward from the peeling sheet PS side, and the said sheet | seat FS side above this extrusion apparatus 28. As shown in FIG. It is comprised by the collection | recovery apparatus 29 located. The extrusion apparatus 28 is comprised by the rod shaft which can move back and forth in a vertical direction across the cylinder etc. which are not shown in figure, and the collection | recovery apparatus 29 is comprised with the suction hole which is not shown in the lower surface side. The extrusion apparatus 28 acts to push the release sheet PS upwards to push out the unnecessary sheet portion S1 to push it out of the raw material sheet L when raised, and the unnecessary sheet portion S1 pushed out is a recovery apparatus. It is aspirated by (29).

1 and 2, a peeling plate (not shown) is disposed on the downstream side of the raw material sheet advancing direction with respect to the removal device 18, and the peeling sheet PS is sharply inverted at the end of the peeling plate. It is provided so that the sheet FS can be peeled from the peeling sheet PS together with the adhesive bond layer A. FIG.

Next, the operation of the present embodiment will be described.

As shown in FIG. 2, the raw material sheet L passes through the first die cutting device 15 so that the outer cutout groove 11 and the inner cutout groove 12 substantially correspond to the outer edge and the center hole of the optical disk. ) Is formed on a substantially concentric circle, thereby forming an adhesive sheet S which sticks to one side of the optical disk. The depths of the outer cutout grooves 11 and the inner cutout grooves 12 are such that they reach the peeling sheet PS without reaching the anvil roller 21 by the aforementioned blade height.

In this way, the raw material sheet L on which the cutout grooves 11 and 12 are formed is set such that the pull blade 28 is positioned inside the inner cutout groove 12 when passing through the second die cutting device 17. In this way, a cutout groove 16 for drawing is formed from the release sheet PS side in the inner side of the inner cutout groove 12 along a substantially circular closed loop (see FIGS. 2A, B and 6). . The depth of this notch notch 16 also does not reach the anvil roller 26, but reaches the boundary between the peeling sheet PS and the adhesive layer A. FIG.

In this way, when the raw material sheet L on which the cutout grooves 16 for drawing are formed passes through the removal apparatus 18, the extrusion apparatus 28 arrange | positioned at the peeling sheet PS side raises, and the peeling sheet PS Impart upward extrusion force. By this extrusion force, the unnecessary sheet part S1 shown in FIGS. 1 and 2 is pushed out of the raw material sheet L, and can be removed by sucking it with the recovery device 29.

In this way, the adhesive sheet S from which the unnecessary sheet portion S1 is pulled out is peeled off through a peeling plate (not shown), and the adhesive sheet S is peeled off and adhered to the optical disk. After the sheet FS is peeled off, the adhesive sheet S bonded to the optical disk is formed with pits or grooves through a stamper.

Therefore, according to this embodiment, since the depth of the inner cutout groove 12 by the inner cutting blade 23 reaches the peeling sheet PS, the blade edge damage of a cutting blade is prevented effectively. Therefore, when removing the unnecessary sheet part S1 with the extrusion apparatus 28, the phenomenon which stretches like a thread and produces | generates the debris does not disappear, and bonding of the adhesive sheet S to an optical disk can be performed precisely. . In addition, the above-mentioned phenomenon can be prevented similarly also in the case where the sheet FS is peeled off from the adhesive layer A after this bonding.

As mentioned above, although the best structure, method, etc. for implementing this invention are disclosed in the said description, this invention is not limited to this.

That is, the present invention is mainly illustrated and described with respect to specific embodiments, but various modifications may be made by those skilled in the art as needed regarding shapes, positions, or arrangements with respect to the embodiments described above without departing from the spirit and scope of the present invention. It can be added.

For example, in the above-described embodiment, the removal device 18 is illustrated and described in the case where the extrusion device 28 is constituted by a rod shaft that can move back and forth in a vertical direction, that is, a direction orthogonal to the surface of the raw material sheet L. 7 is not limited to this. For example, as illustrated in FIG. 7, the rotary shaft 40 includes a pin 41 installed at an outer circumferential surface of the rotary shaft 40 to protrude in the radial direction of the rotary shaft 40. As the rotary shaft 40 rotates, the unnecessary sheet portion S1 may be gradually pushed up to remove the unnecessary sheet portion S1. According to this, unnecessary sheet | seat part S1 is pushed out in the direction inclined with respect to the surface, and it becomes possible to reduce extrusion resistance.

8, the 1st and 2nd die cutting rollers 20 and 25 which comprise the 1st and 2nd die cutting apparatuses 15 and 17 have their rotation center axes on substantially the same perpendicular line. The raw material sheet L may be sandwiched in a symmetrical arrangement.

With such a configuration, not only the anvil roller corresponding to the first and second die cutting rollers can be omitted, but also the configuration can be simplified, and the length of the apparatus main body can be shortened.

Further, in the above embodiment, the raw material sheet L having a layer structure for forming the recording layer of the optical disc is covered, but the raw material sheet used as the protective sheet or the ordinary label raw material sheet used for information display is used. You can also target.

In the above embodiment, a strip-shaped raw material sheet L having a three-layer structure in which the sheet FS is pre-bonded with the adhesive layer A interposed therebetween, is used as a laminate. The raw material sheet may be targeted. That is, what is necessary is just to perform what is called a half cut from an up-down direction by the die cutting blade of a different size with respect to the interface to peel, and remove the unnecessary part.

In addition, the 2nd die cutting apparatus 25 is not limited to the case where it arrange | positions with respect to the 1st die cutting apparatus 15 in the advancing direction downstream of the raw material sheet | seat L, You may arrange | position it to the advancing direction upstream.

According to the present invention, an outer notch groove and an inner notch groove from the sheet side to the release sheet are respectively formed in the first die cutting device, while a notch groove for drawing from the release sheet side to the adhesive layer is formed in the second die cutting device. And a sheet portion and an adhesive layer portion surrounded by the inner cutout groove and a peeling sheet portion surrounded by the cutout groove for removal by a removal device, thereby eliminating the cutting edge forming the inner cutout groove. It is possible to reliably prevent damage to the back and the like, and by avoiding deterioration of cutting accuracy due to the damage, it is possible to remove unnecessary sheet portions without generating a phenomenon of elongation or debris, and also to remove the sheet. One phenomenon can be prevented.

In the present invention, by arranging the first die cutting device and the second die cutting device along the advancing direction of the raw material sheet, maintenance and inspection of each device can be easily performed.

Moreover, in the structure in which the said 1st die cutting apparatus and the 2nd die cutting apparatus are arrange | positioned in the symmetrical position with the raw material sheet | seat interposed, it becomes possible to shorten the length of an adhesive sheet forming apparatus.

Furthermore, since the removal apparatus is comprised including the extrusion apparatus which pushes an unnecessary sheet | seat part, the unnecessary sheet | seat part can be removed reliably.

Moreover, when the said removal apparatus is comprised with the pin and the collection | recovery apparatus which protrude in the radial direction of a roller, an unnecessary sheet part can be removed by the suction amount at least by suction.

Claims (6)

A strip-shaped raw material sheet having at least three-layer structure in which a sheet is pre-bonded with an adhesive layer interposed therebetween, and an outer cutout groove and an inner cutout groove extending from the sheet side to the release sheet along the trajectory of the closed loop. A first die cutting device, each forming to form an adhesive sheet having a predetermined planar shape; A second die cutting device which forms a cutout groove for drawing from the release sheet side to the adhesive layer along the trajectory of the closed loop inside the inner cutout groove; And a removing device for removing the sheet portion and the adhesive layer portion surrounded by the inner cutout groove and the release sheet portion surrounded by the drawing cutout groove as unnecessary sheet portions. The said first die cutting apparatus is arrange | positioned along the advancing direction of the said raw material sheet, and the said 2nd die cutting apparatus is located upstream or downstream of the said advancing direction with respect to the said 1st die cutting apparatus. It is arrange | positioned, The adhesive sheet formation apparatus characterized by the above-mentioned. The bonding sheet forming apparatus according to claim 1, wherein the first die cutting device and the second die cutting device are disposed at symmetrical positions with the raw material sheet interposed therebetween. The said removal apparatus sucks the extrusion apparatus which can advance and retract in the direction which pushes the said unnecessary sheet part from the said peeling sheet side, and the unnecessary sheet part pushed out. A sheet forming apparatus for bonding, comprising a recovery device. The said removal apparatus is provided in the outer peripheral surface part of the rotating shaft arrange | positioned at the said peeling sheet side, and the pin which protrudes in the radial direction of the said rotating shaft, and the said sheet | seat side in any one of Claims 1, 2, or 3. And a recovery device arranged, wherein the unnecessary sheet part is pushed out by the pin so that the unnecessary sheet part is sucked into the recovery device. It is intended for the strip-shaped raw material sheet having at least three-layer structure in which the sheet is pre-bonded with the adhesive layer interposed therebetween, and for the adhesive having a predetermined planar shape by forming a cutout groove along the trajectory of the closed loop from the sheet side. In the method of forming a sheet, After forming the outer notch groove and the inner notch groove from the sheet side to the release sheet to form a planar shape of the adhesive sheet, Forming a notch for drawing to reach the adhesive layer along the trajectory of the closed loop from the release sheet side to the inner notch; Next, the sheet part and the adhesive layer part enclosed by the said inner notch groove, and the peeling sheet part enclosed by the said cutout notch are pushed and removed as an unnecessary sheet part, The adhesive sheet formation method characterized by the above-mentioned.

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