JPH0753421B2 - Method and apparatus for continuously laminating a single-layer laminated film - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for continuously laminating a single-layer laminate film and an apparatus therefor, including a single-layer laminated back side coated with a pressure-sensitive adhesive. It is used for rewinding a roll-shaped laminated film and laminating the pressure-sensitive adhesive portion of the film on the surface of an object to be supplied.

(Prior Art) Conventionally, when a film is continuously laminated on the surface of an object, the laminated film is a plastic film having a release paper coated on one side and a pressure-sensitive adhesive on the back side. A two-layered roll-shaped film was used which was adhered and rolled up.

Lamination on an object is performed as shown in FIG. That is, the two-layer roll-shaped laminated film b held horizontally by the support shaft a is drawn out by the film drawing rollers c and j which also have a peeling action. The release paper e separated by this roller portion is wound around the release paper take-up roller d together with the non-adhesive f used in the release process.

On the other hand, the plastic film g separated from the release paper e is separated by the roller j from the film pull-out roller j and the roller i on the lower side thereof in a state where the pressure sensitive adhesive h is inverted by the roller j. It is laminated on the surface of the object to be laminated k by the action of the pressure-sensitive adhesive h which is superposed on the object to be laminated k which is supplied in between and pressed by the rollers i and j.

(Problems to be Solved by the Invention) When laminating using a two-layer roll-shaped laminating film b, useless release paper e having the same length as that of the laminating film is generated. Since the release paper e is coated with the non-adhesive agent f on one side, the cost required for laminating is the cost of coating the release paper e with the non-adhesive agent f in addition to the costs of the release paper e and the non-adhesive agent f. It will be more expensive.

Moreover, the release paper e coated with the non-adhesive agent f has an irritating odor, is difficult to reuse as waste paper, and cannot be disposed of as general household waste. Therefore, it is necessary to pay the money to collect it. From this aspect, there is a problem that the cost required for laminating is further increased.

The present invention has been made in view of such problems of the prior art, and an object thereof is a single-layer laminate film in which a pressure-sensitive adhesive is coated on the back surface and wound in a roll shape. Provide a method and apparatus for continuously laminating a single-layer laminating film that can reduce the cost by preventing the waste of release paper when laminating on the surface of an object. It is what

(Means for Solving the Problem) In order to achieve the above object, the present invention is, in the first method invention, formed by winding a single-layer laminate film having a pressure-sensitive adhesive coated on the back surface thereof for braking action. From the surface of the roll mounted at the time of rotation when receiving the film, the film is drawn out at a substantially constant speed by a drawing roller through a touch roll that is in constant contact with the surface of the roll, and the drawn film is rotated around the pivot shaft. It is supplied to the film laminating means through a dancer roller at the tip of the arm that is swingably held in a certain range, and by limit switches provided at both ends of the swingable range of the arm,
Each of the limit switches is configured to switch between two transmission systems between an intermediate shaft that rotates at a constant speed by intermittently detecting the tension of the drawn film and a film pull-out roller shaft that is rotationally transmitted by the intermediate shaft. The tension of the film is kept substantially constant by performing it in response to the command of, and in the film bonding means, the film is polymerized and pressed on the surface of the laminating object supplied at a constant speed, This is a method for continuously laminating a single-layer laminate film, characterized in that the film is attached to the surface of the object to be laminated with a pressure sensitive adhesive on the back side.

Further, in the second apparatus invention, a single-layer laminate film having a pressure-sensitive adhesive coated on the back surface and wound in a roll shape, and a rotating shaft on which the roll-shaped film is mounted provide a braking action, A powder brake that adjusts the tension when the film is pulled out, and a touch roll that is disposed so as to be in constant contact with the roll-shaped film surface and is rotatably provided at the tip end side of an arm that is pivotally supported at the base end side. , Two transmissions for transmitting the rotation of an intermediate shaft which is rotated at a constant speed by a film pull-out driving means to a film pull-out roller for pulling out the film through the touch roll and a pull-out roller shaft provided with the film pull-out roller. A pull-out speed switching means of a series, and one end of which is provided after the pull-out roller and is pivotally supported by the shaft. The dancer roller attached to the tip of the movable arm, the limit switches provided at both ends of the dancer roller where the arm of the dancer is swung, and for issuing a command to switch the transmission system of the pulling speed switching means, and the film. And a film laminating means composed of three rollers arranged in the up-and-down direction for superposing on and pressing the surface of the object to be laminated supplied at a constant speed. Is a device for continuously laminating.

Further, the speed switching means includes a first transmission system that transmits the same rotation speed as the intermediate shaft to the roller shaft, and a second transmission system that transmits a higher rotation speed to the roller shaft than the intermediate shaft, In the first transmission system, a first chain wheel on the roller shaft side and a cam clutch attached to the roller shaft are coupled so as to cause a slip when the roller shaft is rotated faster than the intermediate shaft. The second transmission system includes a second chain wheel on the intermediate shaft side and an electromagnetic clutch attached to the intermediate shaft,
It is preferable that the dancer roller is moved upward to be integrally connected by the operation of the arm, and the dancer roller moved downward to be released from the operation of the arm.

(Operation) In the present invention having the above structure, the touch roll that constantly presses the surface of the film is coated on the back surface to form a roll-shaped single-layer laminate film when the film is drawn out by the film drawing roller. At the part where the pressure sensitive adhesive is adhered to the film surface underneath,
The peeling is performed smoothly over the entire width of the film, and the film can be smoothly rewound without causing a shock when peeling the film.

Further, the powder brake that exerts a braking action on the rotating shaft of the roll-shaped film functions to prevent the film from leading in advance and reduce the change in tension even when the rotating shaft is accelerated as the winding diameter of the film decreases.

Further, the dancer roller provided between the film pull-out roller and the film bonding means keeps the tension of the drawn film constant by swinging the arm having one end pivotally supported around the pivot support. When the dancer roller cannot keep the tension of the film constant due to the swing of the arm, the number of rotations of the film pulling roller is increased or decreased by the speed switching means by the two limit switches operated by the swing of the arm. , The amount of withdrawal from the roll-shaped single-layer laminate film is increased or decreased to automatically adjust the film so that it is not stretched or sagging.

Further, the film laminating means provided after the dancer roller is designed so that tension is not exerted on the film superposed on the object to be laminated by the three roller portions arranged in contact with each other in the vertical direction. Then, the film pressed on the object to be laminated by the roller is laminated on the surface of the object to be laminated by the pressure sensitive adhesive coated on the back surface of the film.

(Example) Hereinafter, an example of an apparatus for carrying out the method of the present invention will be described with reference to the drawings.

In FIG. 1, a roll-shaped film 2 attached to a shaft 1 is formed as a single layer by directly winding a back surface coated with a pressure-sensitive adhesive on the front surface of the same film not coated with the pressure-sensitive adhesive. ing. When the film 2 is pulled out by peeling off the pressure-sensitive adhesive, a touch roll provided so as to constantly press the roll-shaped film 2 from a pair of pull-up rollers 3 and 4 which are vertically stacked. 5 via.

The touch roll 5 is a silicone rubber roller rotatably attached to the tip side of the arm 6 whose base side is pivotally supported.
The touch roll 5 is constantly pressed against the surface of the film 2 by the moment action of the touch roll 5 on the surface side of the film 2. Therefore, the film pull-out force by the pull-out rollers 3 and 4 is uniformly dispersed in the entire width direction of the roll-shaped film 2 at the contact portion of the touch roll 5, so that the peeling of the pressure-sensitive adhesive can be smoothly performed and a shock can be given. It is performed with a constant tension without being generated to prevent the film 2 from stretching or sagging.

When the pull-out rollers 3 and 4 pull out the film 2 at a constant speed, the roll diameter of the film 2 becomes smaller as the pull-out time elapses, and accordingly the number of rotations of the shaft 1 increases and the pull-out of the film 2 is accelerated. If this state is left as it is, the acceleration of the shaft 1 causes the film 2 to run ahead, and the tension of the film 2 changes. In order to eliminate this inconvenience, a powder brake 7 is attached to the shaft 1 so that the tension of the film 2 drawn out is automatically kept constant.

The drive of the lower pull-out roller 3 is performed after the rotation of the film pull-out driving means 8 is transmitted from the chain wheel 10 attached to the drive shaft 9 to the chain wheel 13 of the intermediate shaft 12 via the chain 11 and then the intermediate shaft 12 It is carried out by different transmission sequences from the two first and second chain wheels 14 and 15 mounted at other positions (see FIG. 2). The upper pull-out roller 4 is made of silicon rubber or the like, and is rotatably held at the tip of an arm 16 whose one end is pivotally supported.

The first transmission system is the first chain wheel 14 of the intermediate shaft 12.
To transmit the same rotation speed to the chain wheel 17 of the roller shaft 3a having the same number of teeth as that of the chain wheel 17 attached to the roller shaft 3a.
Has a built-in cam clutch 19 that automatically idles the chain wheel 17 with respect to the roller shaft 3a when the rotation speed of the roller shaft 3a becomes faster than the rotation speed of the intermediate shaft 12.

The second transmission system makes the rotational speed of the roller shaft 3a slightly faster than the rotational speed transmitted by the first transmission system.
Rotation is transmitted from the second chain wheel 15 which is attached to the idler 12 to the second chain wheel 21 of the roller shaft 3a having a smaller number of fractions via the chain 22. Reference numeral 20 is an electromagnetic clutch fixed to the intermediate shaft 12, and the electromagnetic clutch 20 is configured to be detachable from the second chain wheel 15.

Therefore, the rotation of the roller shaft 3a by the second transmission system occurs only when the electromagnetic clutch 20 receives an electromagnetic command and is integrally connected to the second chain wheel 15, and at other times, the second chain wheel 15 rotates. Idling the middle shaft 12
The rotation is not transmitted to the roller shaft 3a.

The film 2 drawn by the drawing rollers 3 and 4 is
It is supplied to the film laminating means 31 via the dancer roller 23 and the direction changing roller 30. The dancer roller 23 is rotatably attached to the tip of an arm 25 whose one end is pivotally supported by a shaft 24, and is in a position indicated by a solid line and b indicated by a chain double-dashed line.
By swinging between the position and the pull-out roller 3,4
The tension of the film 2 between the film and the film bonding means 31 is kept substantially constant.

26 is a sector member mounted coaxially with the arm 25,
At both ends of an arcuate groove 27 centered on the shaft 24 formed in the sector member 26, both end positions b and a of the swinging arm 25 are located.
There are first and second limit switches 28, 29 which are actuated at. The first and second limit switches 28, 29 are connected to the electric clutch 20 fixed to the intermediate shaft 12, and the first limit switch 28 instructs the electromagnetic clutch 20 to integrally connect with the second chain wheel 15. Put out
The second limit switch 29 issues a command to the electromagnetic clutch 20 to release the connection with the second chain wheel 15.

The film bonding means 31 includes a U-shaped roller receiver 32,
The space of the roller receiver 32 is composed of three rollers 33, 34 and 35 which are vertically overlapped with each other. Between the lower two rollers 33, 34 is passed a laminating object 36 supplied at a constant speed by a drawing roller (not shown). On the other hand, between the central roller 34 and the upper roller 35 made of silicone rubber or the like which is polymerized on the central roller 34, the film 2 from the direction changing roller 30 is placed with the pressure sensitive adhesive side up. It is supplied from the side opposite to the object 36 to be laminated.

The film 2 supplied between the rollers 34 and 35 is
The roller 33 is turned upside down while touching the surface of the
Between the rollers 33 and 34 while being superposed on the surface of the laminating object 36 passing between the rollers 33 and 34. At the time of this passage, the pressure-sensitive adhesive of the film 2 faces the surface side of the object to be laminated 36, so that the film 2 is laminated on the surface of the object to be laminated 36 by the pressing force of the rollers 34 and 35. 3
7, 38 are guide rollers for the object to be laminated 36, 39 are web guides after lamination, and 40 is a guide roller for laminated products.

Next, the operation of the device will be described.

When the apparatus is driven from the state where the dancer roller 23 is in the position indicated by a, in this state, the second limit switch 29 actuated by the arm 25 releases the electromagnetic clutch 20, and therefore the film pull-out driving means 8 The rotation of the intermediate shaft 12 rotated by the first chain wheel 1
4, the chain 18 and the chain wheel 17 are transmitted to the film pull-out roller 3 integrated with the roller shaft 3a by the first transmission system.

Therefore, the lower film pull-out roller 3 and the upper film pull-out roller 4 made of a rubber material that comes into contact with the upper side of the lower film pull-out roller 3 to press and hold the film 2 pulls the film 2 from the film 2 wound in a roll shape. Is performed. The film pulling force in this case is obtained by the touch roll 5 pressing the surface of the roll-shaped film 2.
The pressure-sensitive adhesive is smoothly peeled off without causing partial stretching of the film 2, because the pressure-sensitive adhesive is uniformly dispersed in the entire width direction.

Further, the roll diameter of the film 2 becomes smaller with the elapse of the pulling time, and the pre-running of the film 2 which tends to occur when the rotation speed of the shaft 1 is accelerated is prevented by the powder brake 7 acting on the shaft 1, so The change in the tension of the film 2 due to is suppressed as small as possible.

However, in the state in which the restraining force is applied to the roll-shaped film 2 by the touch roll 5 and the powder brake 7, the tension of the film 2 gradually increases, and accordingly, the dancer roller 23 rotates from the position a to the position b.
Moved around 24.

When the arm 25 operates the first limit switch 28 by this upward movement, a command to connect the electromagnetic clutch 20 to the second chain wheel 15 is issued. Therefore, the rotation of the intermediate shaft 12 causes the second chain wheel 15, the chain 22, By the second transmission system of the second chain wheel 21 on the roller shaft 3a side, it is transmitted to the roller shaft 3a in a state in which the rotation speed of the intermediate shaft 12 is slightly increased.

In this case, between the chain wheel 17 having the same rotation speed as the intermediate shaft 12 rotated by the first transmission line and the cam clutch 19 having a slightly higher rotation speed than the intermediate shaft 12 rotated by the second transmission line. Due to the difference in the number of rotations, the chain wheel 17 automatically idles with respect to the roller shaft 3a, and the film 2 is pulled out at a speed slightly higher than the rotation speed of the intermediate shaft 12 by the second transmission system.

Therefore, the increasing tension of the film 2 gradually decreases, and the dancer roller 23 held by the arm 25 descends from the position b to the position a. In this state, the arm 25 operates the second limit switch 29 to activate the electromagnetic clutch 20 and the second chain wheel.
Since the connection with 15 is released, the rotation speed of the roller shaft 3a gradually decreases. When the rotation speed of the roller shaft 3a becomes equal to the rotation speed of the intermediate shaft 12, slippage between the chain wheel 17 and the cam clutch 19 disappears, the roller shaft 3a is rotated at the same rotation speed as the intermediate shaft 12, and the driving initial stage It becomes the same driving state. After that, the tension of the film 2 is maintained at a substantially constant value by the action of the dancer roller 23 and the arm 25 that move vertically between a and b.

Therefore, in the film laminating means 31, the film 2 of which the tension is controlled is laminated on the laminating object 36 fed at a constant speed without causing any stretching or slack, so that the laminating product is obtained. Is to prevent curling due to the shrinkage of the film 2 after bonding from occurring, and also to prevent the lamination effect from being lost due to the generation of wrinkles due to slack, thereby improving the yield of high quality products. You can

Moreover, the roll-shaped single-layer film 2 can be formed without using expensive release paper, and not only does not generate waste after the laminating process is completed, but also wasteful cost required for discarding waste is saved. Therefore, the cost required for the laminated film 2 formed in a roll shape can be significantly reduced to about 30%. Further, the laminating process can be applied to the field of varnishing treatment which has been performed as a substitute when the cost required for the laminating process is high.

(Effect of the Invention) Since the present invention is configured as described above, it has the following effects.

In the method for continuously laminating a single-layer laminate film according to claim 1, the film pulled out from the single-layer laminate film formed in a roll shape is supplied to the film bonding section while maintaining a substantially constant tension state. Therefore, it is possible to provide a laminated product having an excellent laminating effect at low cost by laminating a film whose back surface is coated with a pressure-sensitive adhesive without stretching or slackening on the surface of the object to be laminated.

In the apparatus for continuously laminating a single-layer laminate film according to claim 2, when a film is drawn by a pair of drawing rollers, a pressure-sensitive adhesive is peeled off by a touch roll that presses a roll-shaped film surface. It can be performed uniformly in all directions and without shock. Further, the roll-shaped film subjected to the braking action on the rotating shaft prevents the film from leading in advance and reduces the change in tension even when the rotating shaft is accelerated as the winding diameter of the film decreases.

In addition, the tension of the drawn film is kept almost constant by the drawing speed switching means consisting of the first and second transmission systems, so that the film is laminated without causing stretching or slack, and the product is laminated. The effect can be improved.

In addition, when laminating with this device, it is not necessary to use the expensive release paper required for forming the roll-shaped film, and after that, it is possible to prevent the occurrence of waste after laminating. The wasteful cost of cleaning up can be saved, and the cost of laminated products can be significantly reduced.

When the apparatus for continuously laminating the single-layer laminated film according to claim 3 is used, the amount of withdrawal from the roll-shaped film is automatically increased / decreased by the withdrawal speed switching means operated by the arm swinging with the dancer roller. Therefore, the tension of the film to be laminated can be always kept constant.

[Brief description of drawings]

FIG. 1 is a front view showing an example of an apparatus for carrying out the method of the present invention, FIG. 2 is a longitudinal sectional view showing a transmission relationship between an intermediate shaft and a roller shaft of a film drawing roller, and FIG. 3 is a conventional example. It is a front view which shows the apparatus of FIG. 1 ... Rotary axis, 2 ... Film 3,4 ... Film pull-out roller 3a ... Roller axis, 5 ... Touch roll 7 ... Powder brake 8 ... Film pull-out drive means 12 ... Intermediate axis 14,17 ... … 1st sprocket wheel 15, 21 …… 2nd sprocket wheel 19 …… cam clutch, 20 …… electromagnetic clutch 23 …… dancer roller, 24 …… shaft 25 …… arm 28, 29 …… limit switch 31 …… film Laminating means 33,34,35 …… Roller 36 …… Laminated object

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B29L 9:00

Claims (3)

[Claims] 1. A single-layer laminate film having a back surface coated with a pressure-sensitive adhesive is wound and laminated, and the surface of a roll mounted on a rotating shaft subjected to a braking action is in constant contact with the surface of the roll. The film is drawn out at a substantially constant speed by a draw-out roller via a touch roll, and the drawn-out film is bonded to the film via a dancer roller at the end of an arm that is held so as to be swingable in a certain range around a pivot shaft. The tension of the drawn film is intermittently detected by the limit switches provided at both ends of the swingable range of the arm, and the intermediate shaft rotating at a constant speed and the rotational transmission by the intermediate shaft. The switching of two transmission systems between the film pull-out roller shaft and By carrying out, the tension of the film is kept substantially constant, and in the film bonding means, the film is polymerized and pressed onto the surface of the laminating object supplied at a constant speed, and the pressure-sensitive adhesive on the back surface side of the film is adhered. A method for continuously laminating a single-layer laminate film, characterized in that the film is attached to the surface of the laminite object with an agent. 2. A single-layer laminate film having a back surface coated with a pressure-sensitive adhesive and wound in a roll shape, and a rotating shaft on which the roll film is mounted exerts a braking action to pull out the film. A powder brake that adjusts the tension of the touch roll, a touch roll that is disposed so as to be in constant contact with the roll-shaped film surface, and is rotatably provided on the tip end side of an arm that is pivotally supported at the base end side, and this touch roll A film pull-out roller for pulling out the film via the pull-out roller, and a pull-out roller shaft provided with the film pull-out roller, which is composed of two transmission lines for transmitting the rotation of the intermediate shaft rotated at a constant speed by the film pull-out driving means. The speed switching unit and the pulling roller are provided after the pulling roller, and one end of the pulling roller is pivotally supported by a shaft and can swing A dancer roller attached to the tip of the boom, a limit switch provided at both ends where the arm of the dancer roller is swung, for issuing a command to switch the transmission system of the pulling speed switching means, and the film is fixed. It is placed in the up and down direction to superimpose and press on the surface of the laminating object supplied at a speed.
An apparatus for continuously laminating a single-layer laminated film, comprising: a film laminating means composed of individual rollers. 3. The speed switching means transmits a first rotation speed that transmits the same rotation speed as the intermediate shaft to the roller shaft, and a second rotation speed that transmits a higher rotation speed than the intermediate shaft to the roller shaft.
The first transmission system includes a first chain wheel on the roller shaft side and a cam clutch attached to the roller shaft when the roller shaft rotates faster than the intermediate shaft. And a second chain wheel on the side of the intermediate shaft and an electromagnetic clutch attached to the intermediate shaft are integrally formed by the operation of the arm of the dancer roller moving upward. The device for continuously laminating a single-layer laminate film according to claim 2, wherein the device is uncoupled by the operation of the arm of the dancer roller that is coupled and moved downward.