JPH0790597B2 - Laminator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminator for heating a two-leaf plastic film and sandwiching a sheet to be sealed between the two-leaf films to seal the film, and more particularly to improvement of a heating device for the laminator. It is a thing.

[0002]

2. Description of the Related Art Laminators are used for small documents such as commuter passes, membership cards, employee cards, and licenses to old documents, various documents,
It is a device that seals these with a transparent thin thermoplastic plastic film in order to prevent abrasion and stain of various objects to be sealed, such as large-sized photographs and maps.
A conventional laminator, for example, as disclosed in Japanese Utility Model Publication No. 53-23742, is provided with a recess for accommodating a pressure roller on the back surface of a roll formed in a substantially semi-cylindrical shape so that the heating surface is an arc surface. A type in which a heating element is arranged inside a columnar roll has been proposed.

[0003]

However, since the heating roll in this conventional laminator is of a fixed type, when the film is slid on the surface of the heating roll, the surface of the film is streaked due to scratches, and In the case of a large-sized object to be sealed, this phenomenon remarkably appears and spoils the aesthetic appearance, and it is a fatal defect when copying from drawings, old documents and the like.

The present invention has been made in view of the above defects of the conventional laminator, and its object is to rotate the heating roller for heating the plastic film, and to rotate the heating roller. The present invention provides a laminator capable of solving the above-mentioned defects while overcoming various problems.

In order to achieve the above-mentioned object,
The structure of the minator is shown below in correspondence with the example.
Is. That is, the laminator according to the present invention is a plastic
Plastic film supplied from the stock film supply means
A pair of rotary heating rollers 3, 3'for heating the rums 1, 1 '
And plastic heated by the rotary heating roller
The film is directly sandwiched and pressed with the sheet 7.
Thermocompression laminating machine including a pair of pressure rollers 3 and 3 '
Which is the center of rotation of the one rotating heating roller 3
The above-mentioned other than above the pressure-bonding positions of the pressure-bonding rollers 5, 5 '
The center of rotation of the one rotating heating roller 3'is the pressure roller.
The pressure- bonding rollers are provided in front of and below the pressure-bonding positions of 5, 5 '.
The sealed sheet outlet 16 of the sheet sealed at 5, 5 '
Equipped with a separating wall, and discharge from the sealed sheet outlet 16
Cooling means 12, 12 'for cooling the formed sheet from above and below
Is provided, and at least a heating device for the plastic film is provided.
Sealed by transferring rolling process and crimping process by rolling contact
It is configured to cool the sheet from above and below.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a laminator according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing an embodiment of a laminator according to the present invention, showing a state in which a plastic film is spread on the laminator.
The plastic film 1, 1'is a transparent film formed by laminating polyethylene and mylar, for example, and is wound around a pair of upper and lower supply reels (or cassettes) not shown.

The intermediate rollers 2 and 2'include films 1 and 1 '.
The film 1, which has been fed from the supply reel, so that the contact time with the rotary heating rollers 3, 3'described later becomes longer.
It is for changing the traveling direction of 1 '. A pair of upper and lower rotary heating rollers 3 and 3'of the same type heat the films 1 and 1'which are in contact therewith to a temperature at which they can be fused. Since the peripheral speeds of the heating rollers 3 and 3'are the same as the transfer speeds of the films 1 and 1 ', they are transferred in rolling contact with each other to reach the pressure bonding rollers 5 and 5'without slipping.
Heating members 4, 4 ′ such as a pair of strip heaters are arranged near the pressure bonding rollers 5, 5 ′. This is because the films 1, 1'heated to a temperature at which they can be fused by the heating rollers 3, 3'are not absorbed by the pressure rollers 5, 5'and the temperature is not lowered, so that the pressure rollers 5, 5'are preheated. This is because The pressure rollers 5, 5'are formed by fitting a hollow cylinder made of a material having heat resistance and elasticity such as silicon rubber to the core shaft, and the surface thereof is finished to be smooth.

On the other hand, the sheet 7 which is placed on the insertion table 6 and whose side is regulated by the guide plate 8 as the object to be sealed is preheated by absorbing heat from the covers 11 and 11 'which are heated to some extent. When it is inserted between the two leaf films 1, 1'which are spread on the pair of upper and lower pressure rollers 5, 5 ', the pressure rollers 5, 5' press the film 1, 1'from above and below together with the sheet 7, The peripheral edge of the film slightly larger than 7 is heat-sealed. By appropriately selecting the type of the films 1 and 1'and the heating temperature, it is possible to fuse one or both of the films 1 and 1'to the sheet 7.
The film 1, 1'with the sheet 7 sealed is nipped by a pair of upper and lower drawing rollers 9, 9'and led out to the left take-out port to complete the sealing process.

The pull-out rollers 9 and 9'are pressure-bonding rollers 5 and 5, respectively.
The film is made of the same material as 5 ', and the peripheral speed thereof is set to be slightly higher than the peripheral speed of the pressure bonding rollers 5, 5', so that the films 1, 1'are transferred with a constant tension. The peripheral speeds of the pull-out rollers 9 and 9'are the same as those of the pressure roller 5,
Since it is slightly faster than 5 ', some slippage occurs between the drawing rollers 9, 9'and the films 1, 1', but the film 1, 1'is after being cooled, and the amount of slippage is minute. Although there is no risk of scratches caused by scratches, it is desirable to provide a slip mechanism in the pull-out rollers 9, 9 '. A blower 10 is arranged near the upper rotary heating roller 3, the heating member 4, and the pressure bonding roller 5, and a blower 10 'is disposed near the lower rotary heating roller 3', the heating member 4 ', and the pressure bonding roller 5'. Are provided respectively, and upper and lower heating space covers 11 and 11 'are provided so as to surround them. Film passing slits 11a and 11a 'are formed above and below the covers 11 and 11', and the sheet insertion opening 15 and the sealed sheet exit 16 are slightly separated from each other, and A lower cover 11 'is attached. Therefore, the thermal energy generated from the rotary heating rollers 3, 3'and the heating members 4, 4'is transferred to the blowers 10, 1
The film 0'convects in the space between the upper and lower covers 11, 11 'and heats the film uniformly as a whole.

The sealed sheet outlet 16 and the pull-out roller 9,
Cooling fans 12 and 12 'having discharge ports directed to the film surface are provided above and below the film transfer path between the film 9 and 9', and the films 1 and 1'sealed at high temperature and the sheet 7 are rapidly moved. Film 1 taken out from the laminator as it cools
Items such as 1'can be touched immediately. The rotary heating rollers 3 and 3 ', the pressure bonding rollers 5 and 5', and the draw-out rollers 9 and 9'are driven by a drive motor 13 via a chain timing belt or the like. The guide roller 14 provided in the vicinity of the sheet insertion port 15 has a high temperature when the sheet 7 is directly inserted between the pressure bonding rollers 5 and 5 ',
11 'is provided for easy touch, and serves to guide the sheet 7 between the pressing rollers 5 and 5'while pressing the sheet 7 against the insertion table 6.

FIG. 2 is a sectional view showing the detailed structure of the rotary heating rollers 3 and 3 '. The rotary heating rollers 3 and 3'are long so that a large sheet can be sealed, and in the embodiment, they are formed into a hollow cylindrical shape with an aluminum material, and the outer surface thereof is oxidized to form this aluminum oxide. Fluorine resin (for example, polytetrafluoroethylene) is impregnated in many gaps between the crystals of 30 to 5
A 0 micron surface film is produced. Hardness can be obtained simply by coating with fluororesin, but unevenness of the coating occurs on the surface, resulting in poor smoothness.However, the above treatment results in not only good surface hardness and smoothness, but also wear resistance. Excellent in heat resistance, non-adhesiveness, and adhesion, and can be used as the optimum heating roller. Since the heating element 17 is installed in the center of the rotary heating roller 3, the outer surface of the roller 3'is heated to a uniform temperature, and the heating element 1 is heated.
Since a temperature sensing element 18 such as a thermistor is provided between 7'and the outer surface of the roller 3 ', the roller 3'is always provided.
The outer surface of the is maintained at a constant temperature.

Rotating heating rollers 3, 3 ', heating element 17'
The temperature sensing element 18 is pivotally supported by the machine frames 21 and 22 by the support shafts 19 and 20, and the sprocket 27 fixed to this shaft is given a rotational force by the drive motor 13 via a chain, a timing belt or the like. It Four rotary electrodes 23, 24, 25 and 26 are attached to the support shaft 19 under insulation, and the rotary electrodes 23 and 24 are connected to the heating element 1.
The rotating electrodes 25 and 26 are connected to the two terminals of the temperature sensing element 18. These rotating electrodes 23, 24, 25 and 26 are arranged in the radial direction.
The fixed contacts 27, 28, 29, 30 are electrically connected to a power source and a temperature control circuit (not shown) provided outside. Although only the lower rotary heating roller 3'is described, the upper rotary heating roller 3 has the same structure.

The operation of the laminator according to the present invention having the above structure will be described. First, the plastic sheet 1,
1'is attached to the supply reel, and the winding ends are extended in the order of the feeding intermediate roller 2,2 ', the rotary heating roller 3,3', the pressure roller 5,5 ', and the drawing roller 9,9'.
Next, the switches for energizing the heating elements 17, 17 'and the heating members 4, 4'are closed. After a predetermined time, the drive motor 13,
When the switches for energizing the blowers 10 and 10 'and the cooling fans 12 and 12' are closed, the films 1 and 1'are delivered at the same speed and are heated by the heating elements 17 and 17 '. After being heated to the melting temperature while contacting 3'without slippage, it reaches the pressure roller 5, 5'which is preheated to a certain temperature by the heating member 4, 4 '. On the other hand, when the sheet 7 to be sealed is placed on the insertion table 6 and one or both sides thereof are brought into contact with the guide plate 8 and inserted into the insertion port 15, the sheet 7
Is sandwiched between the films 1 and 1 ′ which are spread in a V shape and are being transferred, and the peripheral edge of the film or the film and the sheet are fused together under appropriate pressure between the pressing rollers 5 and 5 ′. The film 1, 1 ′ with the sheet 7 sealed is a pull-out roller 9,
The film is cooled while receiving the cool air from the cooling fans 12 and 12 'while being spread on 9', and then sent out from the draw-out rollers 9 and 9 ', and automatically or manually with a suitable cutter for each sheet 7 unit. The work is completed by cutting 1, 1 '.

[0014]

[Means for Solving the Problems] As described in detail above
The laminator according to the present invention is a plastic film.
Plastic film 1, 1'supplied from the supply means
A pair of rotating heating rollers 3, 3'for heating
Clean the plastic film heated by the heating roller.
A pair of crimping rollers for directly sandwiching and crimping with the seat 7.
It is a thermo-compression type laminator including
Te, the crimped center of rotation of the rotary heating roller 3 of the one
The other rotary member is placed in front of and above the crimping position of the rollers 5, 5 '.
The center of rotation of the heat roller 3'is set to the pressure of the pressure rollers 5 and 5 '.
It is provided in the lower front of the attachment position and is sealed by the pressure roller 5, 5 '.
An isolation wall with a sealed sheet exit 16 for the sealed sheet
The sheet discharged from the sealed sheet outlet 16
The cooling means 12, 12 'for cooling from above and below is provided, wherein the flop
At least heating process and crimping process of plastic film
The rolled sheet to transfer by rolling contact
It is configured to be cooled from. Rotary heating roller 3,
3'is the film supplied from the plastic film supply means.
A pair of rotary heating for heating the plastic film 1, 1 '
Since it is a roller, the plastic film 1,1 '
It is overheated due to the contact with rust. The laminator according to the invention is
The sealed sheet of the sheet sealed by the pressure bonding rollers 5, 5 '.
The cooling means 12, 1 is provided with an isolation wall having an outlet 16.
2'is the sheet discharged from the sealed sheet exit 16
Cool down from above and below. That is, the pressure roller 5, 5 '
After being pressed, the sheet is cooled after passing through the sealed sheet outlet 16.
Therefore, the pressure roller 5, 5'is cooled by the cooling means.
A difficult state is formed. The cooling means 12, 12 'are
From above and below the sheet discharged from the sealed sheet outlet 16
The sheet is cooled evenly so that the sheet does not warp.
Can be cooled to one.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a laminator according to the present invention.

FIG. 2 is a cross-sectional view of a rotary heating roller of a laminator according to the present invention.

[Explanation of symbols]

 1, 1 '... Plastic film 3, 3' ... Rotating heating roller 4, 4 '... Heating member 5, 5' ... Pressing roller 7 ... Sheet 9,9 '... Drawing roller 17, 17' ... Heating element 18 ... Temperature sensing Element 23, 24, 25, 26 ... Rotating electrode 27, 28, 29, 30 ... Contactor

Claims (1)

[Claims] 1. A pair of rotary heating rollers for heating a plastic film supplied from a plastic film supply means, and a pair of pressure rollers for directly sandwiching and pressing the plastic film heated by the rotary heating roller together with a sheet. A thermocompression-bonding type laminator, wherein the rotation center of the one rotary heating roller is provided above and in front of the pressure bonding position of the pressure bonding roller, and the rotation center of the other rotary heating roller is provided in front of and below the pressure bonding position of the pressure bonding roller. , The sealed sheet exit of the sheet sealed by the pressure roller
The isolation wall having provided, the sheet discharged from the sealing already sheet outlet from the top and bottom
A laminator configured to provide a cooling means for cooling and to transfer at least the heating step and the pressure bonding step of the plastic film by rolling contact to cool the sealed sheet from above and below.