JPS603992B2 - Laminating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminating device for thermocompression bonding a plastic film to a plastic base sheet or a base sheet having a plastic coating film formed on its surface.

・For all types of cards such as identification cards, credit cards, and seal registration cards, in order to prevent the surface from being soiled or tampered with, print or write the required information on the card base sheet, and then heat-press a plastic film on both the front and back sides of the card. It is used by laminating it.

Figure 1 shows the main parts of a conventional laminating device. A material to be thermocompressed 1, which is a plastic film coated with a heat-pressure sensitive adhesive on both sides of a base sheet, is placed between upper and lower heaters 3 by a pinch roller 2. The material 1 to be thermocompressed is heated to a temperature at which it can be thermocompressed while passing through the heater, and when the tip of the material 1 to be thermocompressed leaves between the heaters 3, the pressure bonding roller 4 The structure was such that the plastic film was pressed onto the base sheet and then pulled out.

Therefore, in the conventional laminating device, it is necessary to accurately match the feeding speeds of the rollers 2 and 4 so that the material 1 to be thermocompressed does not come into direct contact with the heater 3. When laminating a film of appropriate thickness on a thin paper backing sheet for protection and tamper prevention, the film passes through the first roller 2 and before its tip reaches the loaf 4. It may happen that it sag due to its thermoplastic nature, contacts the heater 3 and melts, necessitating the interruption of operation of the device. For this reason, in the follow-up device, there was a disadvantage in that only thick films could be used, which increased the cost. In addition, in the work of sandwiching a base sheet between two films coated with a heat-pressure sensitive adhesive and laminating them in a sandwich shape, the heating temperature and heating time of the sandwich and the o-
The close relationship between the three pressures has an important effect on the laminated strength and aesthetic appearance of the finished product, but conventional equipment uses the roll pressure of the pinch roller and pressure roller that is appropriate for the composition and thickness of the sandwich. The switching adjustment and temperature adjustment are complicated and require considerable skill, and the length of the base sheet is limited to a length greater than the distance between the rollers 2 and 4.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminating apparatus that eliminates the above-mentioned drawbacks of the conventional method by heating and pressing the material 1 to be thermocompressed using the same roller.

Embodiments of the present invention will be described below with reference to the drawings. Figure 2: In Figure 3, the frame roars.
are provided at the same height, and a pair of pressure rollers 8a and 7b facing each other in a direction perpendicular to the two stands are mounted between the two supports 7.

The pressure roller is made by forming a silicone resin layer on the surface of a heat-resistant synthetic rubber roller. The muddy pond edge is rotated in the direction of the arrow by the deceleration motor force 3 through the timing pulley quantity Q, the government force, and the timing belt force.The upper and lower support parts Murakame 4 fixed to the frame are ~roller Todoroki a? An air heater blows heated air over the entire length of rollers 8a and 8b, facing each other in the common center D plane of rollers 8a and 8b. An air radiator and a pair of Sirocco fan heads 8 that feed air over its entire length are installed horizontally, and the fan 16 is driven separately from the motor to fill air from the rear of the frame. It is configured so that the air taken in through the Yukame-Washi is blown into the air heater Kame-Nezumi through the guide plate Tomi 9 and 2QI.

A large number of heat dissipating plates arranged at equal intervals in the direction of the rut, perpendicular to the wisteria of the air heater Kameba-sama's spectacular roller, are installed on both sides of the transparent eave.
2, and the sheathed heater 23 is supported through the two heat sinks.
3 and the heat dissipation plate 2 are heated from the wall, and this heated air is blown from above and below the rollers to heat it to the temperature required for thermocompression bonding of the turtle turtle to be thermocompressed.

In order to perform the heating effectively, "light rollers a" are installed on the two heat sinks.
Or a roughly semicircular notch 2 surrounding Aoi b'
4 and protruding legs 25 on both sides thereof. The upper end of the protruding chest 25 of the lower air heater tortoise 5 is the feeding table 6 and the feeding table? A gap 26 is provided between the upper and lower opposing protruding legs 25, which is located slightly below the upper surface, through which the thermocompression bonding member can pass. Further, the opposing ends of the upper and lower heat insulating plates 22 are each provided with a roller fin a.
, at approximately the same position as the center of the flea b, the heated air flows out from the end of the heat insulating plate 22 as shown by the arrow. , the material 1 to be thermocompressed is maintained in a state in which the plastic film is in close contact with the base sheet, making it easy to feed into the two gaps, and a similar lead-out plate 28 is also fixed on the feeding table 7, and a roller The thermocompression-bonded material pot a that has passed through the gap B is guided and held.

A pull-out roller 29 made of heat-resistant synthetic rubber is installed at the outlet of the pull-out plate 28.
is provided, and this and the roller 8a are transmission-connected by a chain to rotate the two rollers at the same circumferential speed as the roller 8a.

There is a slight gap between the roller 29 and the upper surface of the feeding table 7, and the distance between the loaf and the crab is set so that it is 4 mm longer than the length of the thermocompression adhesive in the feeding direction. .38'
It is a leaky stripe element made of a thermistor. Side overflow element 30
After adjusting the temperature of the pressure rollers a and 8b to an appropriate temperature, the material to be heat-pressed is guided and inserted into the gap 26 from the introduction plate 29. Within the gap 2, the front and back surfaces of the heat-sealed material are heated. Heated air is blown onto the surface, but after this heated air is rectified by the second heat sink and hits the material to be heat-pressed,
As mentioned above, since it flows out to the outside, the Murakawa to be thermocompressed is caught between the pressure roller grooves a and 8b without flapping in the vertical direction, and heating and pressure bonding are performed all at once.

In this case, since the heat dissipation plate 21 is close to the rollers a and 8W, there is little turbulence in the heated air in the direction of the rollers even within the gap 26, so that the residual air between the base sheet and the plastic film during the biting is are easily eliminated. The thermocompression-bonded material la is sent out passing under the guide plate 28 by the sending action of the rollers a and 8b, and when the tip reaches the pull-out roller 29, the frictional force with this causes the feed-out table 7
It slides over the top and is discharged. In addition to the pull-out roller 29, other suitable well-known means may be used to pull out the thermocompression-bonded material la. The present invention has the above-mentioned configuration, and since the pair of pressure rollers pulls in, sends out, heats, and presses the material to be thermocompressed, the structure of the entire device is extremely simple, and the temperature control and thickness of the material to be thermocompressed are extremely simple. It has excellent effects, such as easy adjustment of the pressure roller, less time required for start-up, and no restriction on the length of the material to be heat-pressed.

[Brief explanation of the drawing]

Figure 2 is an elevational view showing the main parts of the conventional device; Figure 2 is a side sectional view of an embodiment of the device of the present invention; Figure 3 is an A-A in Figure 2.
FIG. 8a, 8b... pressure roller, 15... air heater, 16... fan, 27, 6... introduction device, 28, 7... lead-out Device. Figure 2 Figure 3

Claims (1)

[Claims] 1. A pair of air heaters that are disposed within the common center plane of the pair of pressure rollers and uniformly heat the pressure rollers by blowing heated air onto each pressure roller from a direction perpendicular to the center line of each pressure roller. A laminate comprising: a fan for feeding air into an air heater; and an introduction device for guiding a stack of heat-pressure sensitive adhesive plastic sheets, which are thermo-compressed onto a base sheet, between a pair of pressure-bonding rollers. Device.