JP3824022B2 - Method and apparatus for cutting a bonded body - Google Patents

Description

[0001]
TECHNICAL FIELD The present invention relates to a method and apparatus for cutting a laminated body composed of a web-like film and a cut sheet.
[0002]
In the case of state-of-the-art bonding devices, the sheets are bonded to a thin film previously coated with an adhesive to form a bonded body. A relatively thin film made of a synthetic resin material is fed out endlessly from the roller. The cut sheet is removed from the laminate. The film and sheet are fed together to a laminating device. In order to prevent the rolls from becoming dirty in the laminating device, the continuous cut sheets are often overlapped in the area of the edges. The sheet is covered with a film in a lower layer or an upper layer. The sheet sheets can be joined together even when they are in contact. After lamination, the cut sheets are connected to each other by a film. Prior to further processing in a subsequent processing process, the bonded body must again be separated into bonded sheets. The difficulty that arises in this case is, for example, the accuracy of the upper or lower stack of sheets, especially with respect to the separation of the bonded bodies into bonded pieces. In the case of conventional adhesives, the processing speed of known devices must be, for example, 40 m / min or less. This is because if it does not, the number of failures will increase. Conventionally, 60 m / min was regarded as a “processing sound limit” for the bonding. When UV or ESH polymerized or curable adhesives are used, the adhesive must be cured rather than dried in the original sense. This only takes a moment of time. Sheets laminated with UV-polymerized or curable adhesives can be laminated, for example, to form a laminate immediately after curing without loss of quality. In view of the nature of radiation curable adhesives, adhesive solidification and bonding is not the main cause of limiting processing speed. The cause of the limitation is to prepare the sheet smoothly with an accurate sheet row and to cut accurately.
[0003]
DISCLOSURE OF THE INVENTION Accordingly, the present invention is to improve the method and apparatus, particularly with regard to reliability and final product quality at the highest processing speeds. As a result, even in the case of a high demand in the sense of “artificial bonding”, for example, a radiation curable bonded body can be produced at a high processing speed.
[0004]
The solution of the present invention with respect to the method is that the laminating body passes continuously through the cutting station and is supported for film cutting, and the traversing path of the laminating body moves while the cutter rotates on the laminating body. In the method described at the outset, the raw sheet sheet is moved into the equipment and moved away from the trajectory. Stored on one end side, guided in a horizontal direction to the other end side of the equipment through a moving track, the film is cut, the film is cut by the thermal action of the thermal cutter, the peripheral speed of the cutter is Controlled by a computer, the cutter unit is accelerated to the speed of the bonded body within one cutting cycle for each cutting.
[0005]
The solution of the invention relating to the device consists in that, in the device mentioned at the outset, the raw sheet sheet is provided with a cutter in which the laminate is supported and passes continuously through the cutting station. Are stored on one end of the equipment and can be guided almost horizontally through the runway to the other end of the equipment and the cutting station can move together at the speed of the bonded body, And a rotation control device for the cutter, the cutter is formed as a thermal cutter for cutting the film, and for each cutting, the peripheral speed of the cutter is computerized to accelerate the cutter to the speed of the bonded body It can be controlled via
[0006]
In order to cut a laminate consisting of a web-like film coated with an adhesive and a sheet sheet connected to the coated film, the laminate is laminated continuously from the laminator through the cutting station. Guided. At that time, a cutting station is provided between the laminating apparatus and the subsequent laminating and curing station, and the film is cut by a thermal cutter. During cutting, the cutting device is guided at approximately the same speed as the laminate and moves toward and away from the laminate. Even at very high cutting speeds, clean cutting is achieved by supporting the laminate on a flexible mounting, especially an endless belt, for film cutting. In this case, the endless belt in particular is placed at the beginning and end of the cutting area and moves together at the same speed as the laminate. Since the endless belt can be formed as a suction belt, the laminate is passed through the cutting area by suction attachment. The cutting device is in particular formed as a rotating cutter. In this case, the rotation speed is adjusted as follows through the computer. That is, for each cut, the cutter device is accelerated to the speed of the laminate as a cutting cycle, moved together at about the same speed as the laminate during cutting, and then decelerated to a slower speed. In the range of slow speeds, it is advantageous if the cutter passes a zero or a standard point of motion control as a starting point for achieving the next cycle. The cutting device preferably comprises a thermal cutter. Each cutting cycle corresponds to one rotation of the cutting device. The zero position is defined in the upper quarter of the rotation circle.
[0007]
The film roll of the laminating roll or its driving device is preferably formed as a control guide roll. By means of this control guide roll or its drive, the adhesive applicator and / or the cutting station and / or feeding device can be controlled or adjusted by a computer via a suitable incremental transmitter. Next, the present invention will be described in detail based on a plurality of embodiments.
[0008]
Embodiment of the Invention Referring now to FIG. FIG. 1 schematically shows a process of laminating a cut sheet and a film in a laminating apparatus 15. The film 1 is unwound from the raw film roll 3 as an endless web, with a liquid adhesive applied to one side. The adhesive is applied and dispensed via the applicator 4. In this case, the adhesive may be an ultraviolet polymerizable adhesive. The film 1 to which the adhesive has been applied is then supplied to the laminating roll 7. The cut sheet 2 is taken out from the sheet laminated body 6 and inserted into the roll gap of the laminating device 7 in order in the arrow direction (VA, V1) by the supply device 45. An endless bonded body (laminate) 8 formed by a bonding roll is cut into bonded pieces (laminate pieces) 16 by a cutter 10 of a cutting station 9. In this case, only the film 1 is cut. Then, the bonding piece 16 reaches the conveying device 11. By this conveying device, the bonded piece passes through the curing station 12, and the adhesive is cured by ultraviolet rays. Subsequently, the bonding pieces 16 are arranged on the bonding piece laminate 13 (FIG. 6). The laminating roll 7 comprises an upper film roll or master roll 19 and a lower sheet roll or back pressure roll 20.
[0009]
The cutting station 9 includes a thermal cutter 10 on the film side. This cutter is fixed to the cutter mounting rod and extends over the entire width of the bonded body 8. The cutter mounting bar rotates in the direction of the arrow d, that is, in the same direction as the feeding direction of the bonded body 8. At that time, the cutter draws a rotating trajectory. The cutter 10 is preferably composed of a thin metal strip that can be heated by electrical wires or electrical resistance. A light-passing sensor or some other suitable measuring transmitter 17 is provided in front of the cutting station 9 in the feed range of the bonded body 8. This light passing sensor can detect the leading edge of the bonded piece. By slightly increasing the speed of the conveying device 11, the cut piece 16 can be withdrawn immediately, thereby creating an intermediate space between the individual pieces 16. The speed of the bonded body 8 is detected, for example, via an incremental type transmitter 18 provided on the bonded roll pair 7. Based on the detection values from the transmitters 17 and 18, and depending on the sheet position previously input to the control device, the subsequent cutting processes are respectively controlled or adjusted.
[0010]
In the present invention, an attempt was made to form a bonded body by pressing the film for bonding and without pulling it as much as possible, and thus connecting as little stress as possible. As a result of numerous attempts, it has been found that the cutting edges that are generated and separated during cutting are immediately attached and, after curing, the adhesive connection is equivalent to the relevant part of the other connection.
[0011]
Of course, the device can be configured to be suitable for other adhesive connections. In that case, an adhesive containing a solvent, a dispersion adhesive or a pre-coated film can be used. Depending on the type of adhesive, the curing station 12 (FIG. 6) in front of the cutting station 9 is omitted, and instead a drying device is provided in front of the bonding roll 7. The cutting station 9 may be provided in front of the curing station. The method according to the invention makes it possible to cut the film immediately after leaving the pair of laminating rolls. In certain cases, it is advantageous to first wind up the bonded body 8 on a roller and then divide the roller into individual pieces 16 later with a separate device.
[0012]
The material film 1 is unwound from the material film roll 3 by a braking device that generates a weak restraining force and does not have a driving device. At that time, a variable tensile force “Z” is generated. This pulling force is generated by the application roll 31 and the pressing roll 32 that can be pressed against it. The coating roll 31 is controlled by the incremental transmitter 18 of the film roll 19. In order to be able to adjust the tension Ks of the film 1 with adhesive to a minimum, the film is wound around the measuring roll 33. This measuring roll controls the rotation speed of the coating roll 31 or adjusts it to a desired peripheral speed based on a desired tension measurement value. Similarly, since the sheet supply belt 34 is driven at the effective peripheral speed of the film roll 19, the sheet and the film are guided to the bonded body roll pair 7 at the same speed. At that time, the film 1 has such a tension that it does not sag but cannot be pulled. The bonding roll 7 is provided with a well-known support device. By this support device, the axial interval of the laminating rolls can be increased in a short time with a small force due to the thick overlapping portion (scaly portion). A very slowly rotating metering roll 51 rotates depending on the desired speed of the film 1 and the desired layer thickness of the adhesive coating layer. Since the coating roll 31 rotates faster than the metering roll 51 (double arrow), the adhesive layer remains on the coating roll 31. However, the thickness of the adhesive layer is intentionally selected to be thicker than the desired coating thickness on the film 1. Excess adhesive can be removed by means of an adjustable doctor blade or by means of a dispensing roll 53 whose speed can be adjusted independently. This is done by changing the gap thickness in the case of adjustable doctor blades and by changing the rotation speed and / or the dispensing interval in the case of dispensing rolls. Depending on the task setting, a cleaning doctor blade can be used for all rolls, for example to define the sides of the adhesive application part. However, the speed ratio of the application roll 31 to the distribution roll 51 can be adjusted independently, and the pressing force or the distribution gap between the application roll 31 and the distribution roll 53 can be adjusted independently. is important. Another important point for optimal application of the adhesive is that, regardless of the “adhesive roll” (application roll 31, metering roll 51 and distribution roll 53), the press roll 32 applies it to the application roll 31. It turns out that it has a means to press independently. The pressure roll 32 is preferably not driven by a motor. Thereby, every partial function can be optimized independently. The measuring roll 33 is preferably supported on a force measuring bearing 55 which does not interfere. In addition, an adjusting device is provided. This adjusting device is assisted by the computer C _{2 to} adjust the peripheral speed of the coating roll 31 to a predetermined selectable tension Ks of, for example, several hundred grams. Thereby, the film can be guided in the laminating apparatus without being pulled. Other control instructions from the computer C _2, for example, can issue a control command for the adhesive metering stations and coating stations. FIG. 1 shows in particular the control technology harmonization of the main functions or frequency (sequence) As of the supply device 45, the supply speed V1 or the main functions of the bonding device 15 and the cutting station 9. This control technology harmony is performed via _two computers C ₁ and C ₂ in the illustrated example. The computer C ₁ has, as one main function, the accurate detection of the sequence As of the automatic supply output of the supply device 45. Control signal corresponding thereto is represented by JG S _2. In this case, the sequence As is generated as a function of the processing speed (V1), the sheet length L, the size of the upper or lower overlapping portion, or the sheet-to-sheet spacing that may occur. Since all these values are physical quantities that can be accurately measured or determined, electronic calculation means (EC) are very advantageous. On the other hand, it has been found that the original “handling operation” of the sheet can be carried out very economically according to the invention by purely mechanical means.
[0013]
Machining speed (V1) which is a computer-controllable basic quantity,
Supply frequency (As)
Starting from, the rest is "processed" by surprisingly simple means MM.
[0014]
Using the computer C ₂ as the main computer, for example, can be provided in the range of supply. Thereby, the computer C ₂ is also the input station of the device. The computer C ₁ can be formed in the same comfort level as the second main computer or as a subordinate computer. Harmony is important. However, only one computer can be used.
[0015]
FIG. 6 shows the entire apparatus for laminating cut sheets divided into two halves. The sheet 2 as a material is transferred from the sheet laminate 6 to the alignment stilt 46 by the supply device 45. The sheet is supplied from the aligning station to a press / cleaning calendar 48 for pressing and smoothing the sheet 2 through the cleaning brush 47 in a desired upper or lower state. Furthermore, a receiving device 49 is provided following the laminating station 15, the cutting station 9, the adhesive curing device 12 and the cooling station 41 for the cured sheet. In this storage device, the completed sheet forms the laminate 13.
[0016]
FIGS. 2 a-2 d show different states of the alignment station 46. The central portion of the alignment station 46 is an accelerating roll 70 having a clamping roll 71 that can be interlocked and disengaged and a controllable stopper 72. The sheet 2 is fed from the feeding device 45 via the conveyor belt 45 'in a large lower stack and slides unhindered at the feeding speed VA via the acceleration roll 70 (FIG. 2a). At that time, the supply speed VA is much slower than the apparatus speed V1. The alignment station 46 has three main challenges:
[0017]
First of all, each sheet must be accelerated from its original speed VA to the apparatus speed V1. Second, for example, an exact top / bottom overlap or butt must be formed. Third, it should be possible to use simple and reliable means. At that time, the sheet should be free from press marks, pinching marks or friction marks. This is because these traces reduce the quality of the laminate.
[0018]
The very difficult points are that the machine speed V1 should be adjusted to the standard of lamination, that the sheet has an arbitrary length dimension L, and that the upper or lower overlap dimension or possibly the spacing. Is to be able to select. The row of sheets adjusted at the alignment station must not change until the alignment station 15.
[0019]
The entire cycle is shown in FIGS. In FIG. 2 a, the stopper 72 is at a stop position from the sheet 2-2 to the predetermined lower overlap portion X from the sheet 2-3. At this time, the acceleration roll is locked via the braking clutch (ST). Then, the stopper 72 is swung. In the meantime, the lower overlap portion XBA becomes shorter than that at the start of acceleration of the sheet 2-3 (FIG. 2b). The sandwiching roller 71 is interlocked to lightly press the acceleration roll 70. Start the same time acceleration drive device, then the sheet 2-3 which has been stationary until is accelerated (VB), sheet 2-3 reaches the ideal velocity V _1, such as a sheet 2-2. According to FIG. 2 c, the acceleration roll 70 conveys the sheet 2-3 until the sheet 2-3 is gripped by the guide roll pair 73. FIG. 2c shows the state of the upper overlapped portion or the lower overlapped portion Xu that is preliminarily selected simultaneously with the end state of acceleration. The upper and lower overlapping portions are kept unchanged from this point.
[0020]
Now it moves at the same speed as the acceleration roll V1. FIG. 2 d shows a state in which the sheet 2-3 is completely under the control of the guide roll pair 73. In this case, the sandwiching roll 71 can be released from interlocking, and the acceleration roll can be braked. Next, the sheet 2-4 has already moved toward the stopper 72. In the meantime, the stopper moves again to the stop position. The above process is repeated corresponding to FIG.
[0021]
FIG. 3 shows the basic control functions of the alignment station 46. The computer C ₁ is connected to an incremental type transmitter JG of a subsequent processing apparatus. In this case, the drive means 74 shown schematically can drive the supply belt 34 'at the speed V1 of the processing device. The acceleration roll 70 can be directly connected to a driving device 74 on the machining process side through a mechanical transmission device and a center line 80. On the other hand, the interlocking and interlocking release mechanism 82 for the stopper 72, clutch lever 91 and guide roller 71 can be controlled directly by the drive unit of the supply device 45 or from the supply device side via a suitable transmission device 83. A common control shaft 85 is provided for all three control functions. The control shaft is provided with three cam disks 86, 87, 88 corresponding to three functions. The cam disk 86 directly acts on the contact roller 89, the lever hinge 90, and the clutch lever 91 for the clutch 81. The cam disk 87 controls the interlocking and interlocking release mechanism 82 via the lever 92 and the connecting rod 93. The third cam disk 88 controls the rotating arm 95 of the stopper 72 via the lever 94.
[0022]
FIG. 4 shows the alignment station of FIG. 3 in a partial cross-sectional view and partly in the form of an arrow XX. In this case, the clutch 81 is shown disengaged. The sliding bush 95 is slid in the horizontal direction via the clutch lever 91 and can be pressed against the acceleration clutch 96 on the left side. Thereby, the mechanical transmission 80 acts on the acceleration roll 70. By appropriately selecting the sliding clutch lining, lever force, spring displacement 99, pre-compression or characteristics of the spring system 97, the acceleration roll and thus the sheet is gently accelerated. Thereby, drag transmission is selected via a selectable rotational displacement. The clutch has an opposite half so that the movement of the seat is kept under full control. The opposite half is formed as a braking clutch 98 and stops the accelerating roll 70 at the correct time in harmony with other movements. The delay time can be adjusted by adjusting the spring force of the adjusting spring 97 'for the brake clutch. The sliding bush is held in the brake ready position by a spring 97 ″ when no control is performed.
[0023]
FIG. 5 is an enlarged view of the clutch shown in FIG.
[0024]
7 and 8 show the generation of bonded pieces in the case of bonding of the bonded body and cutting of the film. The cutter 10 performs a rotational movement with respect to the rotation axis 100. In this case, the working circle of this cutter, which may be a thermal cutter known per se, is indicated by a dashed line by a circle 101. The normal direction of rotation is represented by d. The diameter of the working circle 101 is represented by DW. The driving device 102 is not shown, but can be formed as known. Drive device 102 must be designed to be very accurate and the speed of the rotational movement of the cutter varies extremely, must be controllable by the computer C _2. The bonded body moves horizontally from the bonding roll 7 to the suction belt 103 that moves together at the same speed V1. This suction belt is stretched with sufficient tension e through three guide rollers 104, 104 ', 104 ". The fan rotor 105 displays the function of the negative pressure of the small chamber 106. , The bonded body not only moves together by the support belt 103 but also passes through the cutting station 9 by the adhesion force of the suction belt 103. Outside the area 107 where the cutter 10 is cut, the support belt 103 Below the two mounting points 108, 108 ', the actual cutting trajectory or circle 101 is slightly lower than the uninterrupted moving trajectory of the bonded body, so that the cutter 10 In this case, not only the action of heat but also a little mechanical cutting force works.
[0025]
FIG. 8 shows an example of a graph of cutter speed for rotational motion or the entire cycle 1. At that time, MB indicates the cutter acceleration, Ms indicates the cutter cutting contact, Mv indicates the cutter deceleration, and MR indicates the cutter stop range. This graph showing the speed versus displacement clearly shows that the cutter is very accelerated to speed V1 (Vm) before cutting. Thereafter, the cutter must move together with the glued body at the same speed and enter the deceleration phase VMth. In particular, it is important not only to control the speed course during the rotational movement for cutting, but also to control the process by means of an incremental transmitter JG in the same way as the control of the feeding device. Thereby, the cut exactly matches the length of the sheet being processed. However, almost the same parameters occur for cutting. This is in particular the device speed V1 and the sheet length L. It is advantageous to control the drive via a program based on the course of movement. This basic program is adapted by the computer to the specific machine speed and sheet length.
[Brief description of the drawings]
[0026]
FIG. 1 is a diagram schematically showing fabrication of a bonded body and a bonded piece.
FIGS. 2a-2d show various stages of sheet alignment.
FIG. 3 is a diagram illustrating a control device for sheet alignment.
4 is a cross-sectional view taken along line XX of FIG.
FIG. 5 is an enlarged view of the mechanical acceleration and braking clutch.
FIG. 6 is a diagram showing the entire bonding apparatus divided into two parts.
FIG. 7 schematically shows a cutting station.
FIG. 8 is a diagram showing the speed of the cutter with respect to displacement.

Claims (9)

A method of cutting a bonded body (8) comprising a web-like film (1) coated with an adhesive and a cut sheet (2, 2 ', 2 ") connected to the coated film, On the one hand, the film (1) is unwound from the raw film roll (3), one side of which is applied and distributed with an adhesive by the application device (4), and the film (1) applied with the adhesive is: On the other hand, the cut sheet (2) is taken out from the sheet laminate (6) and is fed into the roll gap of the laminating device (7) at the apparatus speed by the supplying device (45). The laminated body (8) inserted in sequence and formed by a laminating roll is formed into a laminated piece (16) by the rotary cutter (10) of the cutting station (9) cutting only the film (1). Disconnected The bonded piece (16) is sent to the conveying device (11) and the adhesive applied at the curing station (12) is cured, and then the bonded piece (16) is bonded to the bonded piece laminate (13). In the above method, in this case,
The circle (101) of the rotary cutter (10) is at a slightly lower position relative to the unobstructed movement trajectory of the bonded body (8), and the bonded body (8) is moved by the suction belt (103) during cutting. Pushed into the track, the film cutting being performed with the thermal action of the thermal rotary cutter (10) and a little mechanical cutting force, and
The computer (C1; C2) accelerates the peripheral speed of the rotary cutter (10) within one cutting cycle, and the rotary cutter (10) moves the cut sheet (2) at the apparatus speed during the rotary cutter cutting contact (MS). Cutting the film (1) along the edge. 2. A method according to claim 1, characterized in that the speed change of the rotary cutter (10) is controlled to cut according to the equipment speed and the sheet length (L). A support belt (103) for the bonded body (8) is arranged below the rotary cutter unit, and the support belt moves together at approximately the same speed as the bonded body (8). Item 3. The method according to Item 1 or 2. 4. The film (1) according to any one of claims 1 to 3, characterized in that the bonded body piece (16) is cut before the bonded body (8) is cured and the bonded body piece (16) is separated. Method. The rotary cutter (10) for cutting is rotated relative to the support belt (103) that moves together, and the peripheral speed of the rotary cutter is controlled by the computer (C2), and the rotary cutter unit for each cutting Accelerating to the speed of the bonded body within one cutting cycle, the rotary cutter unit moving together at approximately the same speed as the bonded body during cutting and then decelerated to a lower speed. The method as described in any one of 1-4. An apparatus for cutting a bonded body (8) comprising a web-shaped film (1) coated with an adhesive and a cut sheet (2, 2 ', 2 ") connected to the coated film, On the one hand, the film (1) is unwound from the raw film roll (3), one side of which is applied and distributed with an adhesive by the application device (4), and the film (1) applied with the adhesive is: On the other hand, the cut sheet (2) is taken out from the sheet laminate (6) and is fed into the roll gap of the laminating device (7) at the apparatus speed by the supplying device (45). The laminated body (8) inserted in sequence and formed by a laminating roll is formed into a laminated piece (16) by the rotary cutter (10) of the cutting station (9) cutting only the film (1). Disconnected The bonded piece (16) is sent to the conveying device (11) and the adhesive applied at the curing station (12) is cured, and then the bonded piece (16) is bonded to the bonded piece laminate (13). In the device arranged above, in this case,
The circle (101) of the rotary cutter (10) is at a slightly lower position relative to the unobstructed movement trajectory of the bonded body (8), and the bonded body (8) is moved by the suction belt (103) during cutting. Being pushed into the track, the film cutting being performed with the thermal action of the thermal cutter (10) and a slight mechanical cutting force, and
The computer (C1; C2) accelerates the peripheral speed of the rotary cutter (10) within one cutting cycle, and the rotary cutter (10) moves the cut sheet (2) at the apparatus speed during the rotary cutter cutting contact (MS). A device characterized in that the film (1) is cut along the edge. The peripheral speed of the rotary cutter (10) is controllable by the computer (C2), and by this control the rotary cutter unit is accelerated to the speed of the bonded body within one cutting cycle for each cutting, 7. A device according to claim 6 , characterized in that it moves together at approximately the same speed as the bonded body and is subsequently decelerated to a lower speed. Below the circular rotary cutter unit, characterized in that the movable suction belt lamination body (8) at the same speed (103) are arranged, according to claim 6 or 7 Symbol mounting device. 9. A device according to claim 7 or 8 , characterized in that the rotary cutter (10) comprises an electric wire or a thin metal strip that can be heated by electrical resistance.

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