JPH02281089A - Continuous lamination for single-layer laminate films and its laminator - Google Patents

Abstract

PURPOSE:To continuously laminating single layer laminate films economically without waste of released paper during the lamination by using laminate films which are coated with a pressure-sensitive adhesive on the back surface and wound in a roll. CONSTITUTION:Film 2 is taken out of the surface of the single-layer laminate film which is made in a roll with a pressure-sensitive adhesive coated on its back surface at an almost constant speed by means of driving means 8. The taken-out film 2 is kept under an almost constant tension by the dancer roller 23 on the top of arm 25 which is held swingable around the bearing axis and over-lapped on the substrate 36 fed at a constant speed and pressed to it whereby the film 2 is laminated to the surface of the substrate 36 with the pressure- sensitive adhesion on the back surface.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method and apparatus for continuously laminating single-layer laminate films, and relates to a method and an apparatus for continuously laminating single-layer laminate films. It is used to unwind a roll of laminating film and laminate the pressure sensitive adhesive portion of the film to the surface of the object being supplied.

(Prior art) Conventionally, when laminating a film continuously on the surface of an object, the laminating film is a plastic film coated with a pressure-sensitive adhesive on the back side and a release paper that has been subjected to release treatment on one side. Two layers of rolled film were used, which were glued together and rolled up.

Lamination to the object is performed as shown in FIG. That is, the two-layer roll-shaped laminate film b held horizontally by the support shaft a is pulled out by film pull-out rollers C and J, which also serve as a peeling function. The release paper e separated at this roller portion is taken up by a release paper take-up roller d together with the non-adhesive agent f used in the release process.

On the other hand, the plastic film g separated from the release paper e is inverted by the roller j so that the pressure-sensitive adhesive is facing downward, and then the plastic film g is transferred to the film pull-out roller j.
The pressure-sensitive adhesive is placed on top of the object to be laminated, which is supplied between the rollers i and roller l below it, and is pressed by rollers i and j. The surface was laminated.

(Problems to be Solved by the Invention) When laminating is performed using two layers of roll-shaped laminate film b, an unnecessary release paper e having the same length as that of the laminated film is generated. Since this release paper e is coated with a non-adhesive agent f on one side, the cost required for lamination is the cost of the release paper e 23 and the anti-adhesive agent, plus the cost of coating the release paper e with an anti-adhesive agent r. It will be more expensive due to the cost.

Moreover, the release paper e coated with the anti-adhesive agent f has a pungent odor, making it difficult to reuse as waste paper and not disposing of as general household waste, so people have to pay money to have it taken away. From this point of view as well, there is a problem in that the cost required for lamination becomes even more expensive.

This invention was made in view of the above-mentioned problems of the conventional technology, and its purpose is to provide a single-layer laminate film coated with a pressure-sensitive adhesive on the back side and wound into a roll. To provide a method and apparatus for continuously laminating a single layer laminate film, which can reduce costs by laminating release paper on the surface of an object using a laminate, thereby avoiding waste of release paper during lamination. That is.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a first method invention in which a single layer laminate formed in a roll shape with a pressure-sensitive adhesive coated on the back side is formed from the surface of the film. The film is pulled out at a constant speed, the pulled out film is kept under a constant tension by a dancer roller at the end of an arm that is swingably held around a pivot shaft, and the film is fed at a constant speed. This method involves polymerizing and pressing the film onto the surface of the object to be laminated, and then bonding the film to the surface of the object to be laminated using a pressure-sensitive adhesive on the back side of the film to continuously laminate a single-layer laminate film. .

In addition, in the second device invention, a roll-shaped single-layer laminate film whose back side is coated with a pressure-sensitive adhesive is attached to a rotating shaft that receives a braking action to adjust the tension when pulling out, and the roll-shaped film is A touch roll is rotatably attached to the surface so as to be in constant contact with the film pull-out roller. The dancer roller, which is provided with a pull-out speed switching means and is provided after the pull-out roller, has one end pivoted on a shaft and is attached to the tip of a swingable arm, and both ends of the dancer roller arm are swingable. A limit switch is provided at the speed switching means to issue a command to change the film feeding speed for switching the swinging direction of the arm, and the film laminating means is configured to laminate the film transferred from the dancer roller. It is composed of three rollers arranged in the vertical direction that overlap and press the object,
This is a device that continuously laminates single-layer laminate films.

The speed switching means for keeping the tension of the film constant in the above device includes a first sprocket wheel on the pull-out roller shaft side to which the same rotation speed as the intermediate shaft is transmitted;
A second sprocket wheel on the intermediate shaft side that is coupled to a cam clutch attached to the roller shaft so as to cause slippage when the roller shaft is rotated faster than the intermediate shaft, and transmits a higher rotation speed than the intermediate shaft to the roller shaft. and an electromagnetic clutch attached to the intermediate shaft are configured such that they are coupled together by the operation of the arm of the dancer roller that moves upward, and are released from the coupling by the operation of the arm of the dancer roller that moves downward. preferable.

(Function) In the present invention having the above configuration, the touch roll that constantly presses the surface of the film coats the back surface to form a roll-shaped single-layer laminate film when the film is pulled out by the film pull-out roller. The part where the pressure-sensitive adhesive is attached to the surface of the film underneath.
This function allows peeling to be performed smoothly over the entire width direction of the film, and enables smooth rewinding without generating shock when peeling the film.

Further, a dancer roller provided between the film drawing roller and the film bonding means keeps the tension of the drawn film constant by swinging an arm, one end of which is pivoted, around the pivot. . When the dancer roller cannot keep the tension of the film constant due to the swinging of the arm, the arm swings;
The speed switching means increases or decreases the number of rotations of the film pull-out roller by the two limit switches activated thereby, and the amount of pull-out from the roll-shaped single-layer laminate film is increased or decreased, thereby stretching the film. Automatically adjusts to prevent sagging.

Furthermore, the film laminating means provided after the dancer roller has three roller portions disposed in contact with each other in the vertical direction, so that the film being laminated onto the object to be laminated is not affected by tension. Then, the film pressed onto the object to be laminated by the roller is laminated onto the surface of the object to be laminated using a pressure-sensitive adhesive coated on the back side 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 into a single layer by directly wrapping the back side coated with a pressure-sensitive adhesive onto the front side of the same film not coated with a pressure-sensitive adhesive. ing. The film 2 is pulled out by peeling off the pressure-sensitive adhesive part, using a touch roll 5 provided to constantly press the roll-shaped film 2 from a pair of draw-out rollers 3 and 4 placed one above the other in the vertical direction. It is done through.

The touch roll 5 is a silicone rubber roller rotatably attached to the distal end side of an arm 6 whose base end is pivotally supported.
Due to the touch roll 5's own weight (moment action on the surface side of the film 2), it is constantly pressed against the surface of the film 2. Therefore, the film pull-out force by the pull-out rollers 3 and 4 is applied to the contact portion of the touch roll 5. In,
The adhesive is uniformly distributed across the entire width of the roll-shaped film 2, allowing the pressure-sensitive adhesive to be peeled off smoothly and under constant tension without causing shock, thereby preventing the film 2 from stretching or sagging. Make it.

When the pull-out rollers 3 and 4 pull out the film 2 at a constant speed, the roll diameter of the film 2 decreases as the pull-out time elapses, and the rotational speed of the shaft 1 increases accordingly, accelerating the pull-out of the film 2. If this condition is left unattended, the film 2 will run ahead due to the acceleration of the shaft 1.
The tension of 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 being pulled out is automatically maintained constant.

The lower pull-out roller 3 is driven after the rotation of the film pull-out drive means 8 is transmitted from a chain wheel 10 attached to a drive shaft 9 to a chain wheel 13 of an intermediate shaft 12 via a chain 11. The two first . This is done by a different transmission train from the second chain wheel 14,15 (see FIG. 2). The upper pull-out roller 4 is made of silicone rubber or the like, and is rotatably held at the tip of an arm 16 having one end pivotally supported.

The first transmission system transmits the same number of rotations from the first chain wheel 14 of the intermediate shaft 12 to the chain wheel 17 of the roller shaft 3a having the same number of teeth via the chain 18. In the chain wheel 17 attached to the intermediate shaft 1, the rotation speed of the roller shaft 3a is
When the number of revolutions is higher than 20, chainwheel 1
A cam clutch 19 is built in to automatically rotate the roller shaft 7 idly relative to the roller shaft 3a.

The second transmission train makes the rotational speed of the roller shaft 3a slightly faster than the rotational speed transmitted by the first transmission train, and is connected to a second chain wheel 15 that is attached to the intermediate shaft 12 so as to be able to rotate idly. Rotation is transmitted via the chain 22 to the second chain wheel 21 of the roller shaft 3a, which has fewer teeth than this. Reference numeral 20 denotes 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 train occurs only when the electromagnetic clutch 20 receives an electromagnetic command and is coupled integrally with the second chain wheel 15, and at other times, the second chain wheel 15 rotates. The rotation of the intermediate shaft 12 is not transmitted to the roller shaft 3a by idle rotation.

The film 2 pulled out by the pull-out roller 3.4 is supplied to a film bonding means 31 via a dancer roller 23 and a 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 swings between a position indicated by a solid line and a position b indicated by a two-dot chain line. , the tension of the film 2 between the pull-out rollers 3, 4 and the film bonding means 31 is kept almost constant.

A sector member 26 is attached coaxially with the arm 25, and a swinging arm 250 is provided at both ends of an arc-shaped groove 27 centered on the shaft 24 formed in the sector member 26.
The first one is operated at both ends, a. A second limit switch 28,29 is provided. 1st. Second
The limit switches 28 and 29 are connected to the electromagnetic clutch 20 fixed to the intermediate shaft 12, and the first limit switch 28 issues a command to the electromagnetic clutch 20 to integrally connect with the second chain wheel 15, and the second limit switch 29 is the electromagnetic clutch 20. A command is issued to release the connection with the second chain wheel 15.

The film bonding means 31 includes a U-shaped roller receiver 32.
and three rollers 33, 34, and 35 stacked vertically in the space of the roller receiver 32. A laminated object 36 is passed between the two lower rollers 33 and 34 and is fed at a constant speed by a pull-out roller (not shown). On the other hand, between the central roller 34 and the upper roller 35 made of silicone rubber or the like polymerized thereon, 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 to be laminated 36.

The film 2 supplied between the rollers 34 and 35 is reversed while in contact with the surface of the roller 34, and is superimposed on the surface of the object to be laminated 36 passing between it and the roller 33 below the roller 33. It passes between ゜34. During this passage, the pressure-sensitive adhesive of the film 2 faces the surface side of the object to be laminated 360, so that the film 2 is laminated onto the surface of the object to be laminated 36 by the pressing force of the rollers 34 and 35. 37.38 is the object to be laminated 3
6 is a guide roller, 39 is a web guide after lamination, and 40 is a guide roller for the laminated product.

Next, the operation of the device will be explained.

When the apparatus is driven from the state where the dancer roller 23 is in the position shown in a, in this state, the second limit switch 29 operated by the arm 25 has released the electromagnetic clutch 20, so that the film unloading drive means 8
The rotation of the intermediate shaft 12 rotated by is transmitted to the film drawing roller 3 integrated with the roller shaft 3a by a first transmission train of the first chain wheel 14, the chain 18, and the chain wheel 17.

For this reason, the film 2 is pulled out from the rolled film 2 by 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 and presses and holds the film 2. will be carried out. In this case, the film tensile force is applied to the film 2 by the touch roll 5 that presses the surface of the roll-shaped film 2.
Since the pressure-sensitive adhesive is dispersed relatively uniformly throughout the width of the film 20, peeling of the pressure-sensitive adhesive is smoothly performed without causing partial stretching of the film 20.

In addition, the powder brake 7 acting on the shaft 1 prevents the film 2 from running ahead, which tends to occur when the roll diameter of the film 20 decreases with the passage of time and the rotational speed of the shaft 1 is accelerated. Changes in the tension of the film 2 are kept to a minimum.

However, when a restraining force is applied to the roll-shaped film 2 by the touch roll 5 or the powder brake 7, the tension of the film 2 gradually increases, and the dancer roller 23 moves from position a to position b. It is moved up about the axis 24.

This upward movement causes the arm 25 to switch the first limit switch 28.
When activated, a command for coupling with the second chain wheel 15 is issued to the electromagnetic clutch 20, so that the rotation of the intermediate shaft 12 is controlled by the rotation of the second chain wheel 15, the chain 22, and the second chain wheel 21 on the roller shaft 3a side. 2, the rotational speed of the intermediate shaft 12 is transmitted to the roller shaft 3a at a slightly increased speed.

In this case, the intermediate shaft 12 rotated by the first transmission train
Since there is a difference in the rotation speed between the chain wheel 17, which has the same rotation speed as the roller shaft 3a, and the cam clutch 19, which has a slightly higher rotation speed than the intermediate shaft 12 rotated by the second transmission train, the chain wheel 17 is rotated by the roller shaft 3a. The second transmission train automatically rotates the film 2 at a speed slightly higher than the rotational speed of the intermediate shaft 12.

As a result, the increasing tension of the film 2 gradually decreases, and as a result, the dancer roller 23 held by the arm 25 descends from the position b to the position shown in a. In this state, the arm 25 operates the second limit switch 29 to release the coupling between the electromagnetic clutch 20 and the second chain wheel 15, so that 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, the chain wheel 17
There is no slippage between the roller shaft 3a and the cam clutch 19, and the roller shaft 3a is rotated at the same rotation speed as the intermediate shaft 12, resulting in the same operating state as in the initial stage of driving. After this, due to the action of the dancer roller 23 and the arm 25 that move up and down between a and b,
The tension of the film 2 is kept at an approximately constant value.

Therefore, in the film bonding means 31, the tension-controlled film 2 is bonded onto the laminated object 36, which is supplied at a constant speed, without stretching or sagging. To improve the yield of high-quality products by not only preventing curling caused by shrinkage of the film 2 after lamination, but also preventing the lamination effect from being lost due to wrinkles caused by sagging. I can do it.

Moreover, the roll-shaped single-layer film 2 can be formed without using expensive release paper, which not only eliminates the generation of waste materials after the lamination process is completed, but also saves unnecessary costs required for disposal of waste materials. Therefore, the cost required for the laminate film 2 formed in a roll shape can be significantly reduced to about 30%. Furthermore, lamination processing can also be applied to the field of varnishing, which has been used as a substitute when lamination costs are high.

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

In the method of continuously laminating a single-layer laminate film according to claim 1, the film pulled out from a roll-shaped single-layer laminate film is supplied to a film bonding section while maintaining a substantially constant tension state. Therefore, it is possible to laminate a film coated with a pressure-sensitive adhesive on the back side without causing any stretching or sagging on the surface of the object to be laminated, and to provide a laminating process with excellent lamination effect at a low cost. .

In the apparatus for continuously laminating single-layer laminated films according to claim 2, the pair of pull-out rollers is used to pull out the film, and a touch roll that presses the surface of the rolled film is used to separate the pressure-sensitive adhesive over the width of the film. This can be done uniformly in all directions and without causing shock. Further, a roll-shaped film subjected to a braking action by the rotating shaft prevents the film from running ahead of itself and reduces changes in tension even when the rotating shaft accelerates as the winding diameter of the film decreases.

Moreover, the tension of the drawn film is 1.
Since the drawing speed is kept substantially constant by the drawing speed switching means consisting of the second transmission train, the film can be laminated without elongation or sagging, and the lamination effect of the product can be improved.

Moreover, when laminating with this device, there is no need to use expensive release paper that is required to form roll-shaped films, and it also eliminates the need for unnecessary materials after lamination. It also saves unnecessary costs associated with cleaning up, making it possible to significantly reduce the cost of laminated products.

When the apparatus for continuously laminating single-layer laminated films according to claim 3 is used, the amount of the film to be drawn out from the roll can be automatically controlled by the pull-out speed switching means operated by the arm that swings together with the dancer roller. The tension of the laminated film can be kept constant by increasing and decreasing the tension.

[Brief explanation 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 the transmission relationship between the intermediate shaft and the roller shaft of the fillem pull-out roller, and FIG. 3 is a conventional example. FIG. 3 is a front view showing the device. ■...Rotating axis 2...Film 3.4
...Film pull-out roller 3a...Roller shaft 5...Cutchi roll 7
...Powder brake death...Film drawer drive means 12...Intermediate shaft 14.17...First sprocket wheel 15.21
...Second sprocket wheel 19...Cam clutch 20...Electromagnetic clutch 23...Dancer roller 24...Shaft 25...Arm 28.29...Limit switch 31...Film pasting Aligning means 33, 34, 35...Roller 36...Object to be laminated

Claims (3)

[Claims] (1) The film is pulled out at a nearly constant speed from the surface of a roll-shaped single-layer laminate film using a pressure-sensitive adhesive coated on the back side, and the pulled-out film is held so that it can swing around a pivot shaft. A dancer roller at the end of the arm is used to maintain a nearly constant tension, and the film is polymerized and pressed onto the surface of the object to be laminated, which is fed at a constant speed, and the film is laminated using the pressure-sensitive adhesive on the back side of the film. A method of continuously laminating a single-layer laminate film, which is characterized by being bonded to the surface of an object. (2) The roll-shaped single-layer laminate film, whose back side is coated with a pressure-sensitive adhesive, is attached to a rotating shaft that receives a braking action to adjust the tension when pulling out, and the roll-shaped film surface is always in contact with the roll. A touch roll is rotatably attached to the film draw-out roller, and a pull-out speed switching means is provided on an intermediate shaft rotated by the film pull-out drive means and a pull-out roller shaft that receives rotational transmission from the intermediate shaft. The dancer roller provided after the pull-out roller has one end attached to the tip of an arm that is pivotally supported on a shaft and is swingable, and the speed switching means is attached to both ends of the dancer roller at which the arm swings. On the other hand, a limit switch is provided that issues a command to change the film feeding speed to switch the swinging direction of the arm, and the film laminating means overlaps and presses the film from the dancer roller onto the moving laminating object. An apparatus for continuously laminating single-layer laminate films, characterized by comprising three rollers arranged in the vertical direction. (3) The speed switching means includes a first sprocket wheel on the pull-out roller shaft side to which the same rotational speed as the intermediate shaft is transmitted, and a cam clutch attached to the roller shaft.
a second sprocket wheel on the intermediate shaft side that is coupled to cause slippage when the roller shaft is rotated faster than the intermediate shaft and transmits a higher rotation speed than the intermediate shaft to the roller shaft; and an electromagnetic clutch attached to the intermediate shaft. The single-layer laminate film according to claim 2, wherein the single-layer laminate film is configured to be integrally coupled by the operation of the arm of the dancer roller that moves upward, and to be uncoupled by the operation of the arm of the dancer roller that moves downward. A device that laminates continuously.