JPS6054868B2 - Sheet body surface coating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for covering the surface of a sheet body such as a card or bill with a plastic film so as to tightly adhere thereto.

In general, "business cards", "identification cards", "commuter passes",
For sheet bodies such as "mini calendars" and other cards and bills, a surface coating, which can be called a form of packaging, is provided to impart or improve durability and water resistance to the sheet body, or to further improve the durability and water resistance of the sheet body. It is convenient and often necessary to prevent modification of the display items on the sheet body.

In response to such demands, various sheet body surface coating devices have been proposed.

For example, in a conventional sheet body surface coating apparatus configured for double-sided coating, as shown in FIG. A pair of hollow rollers 3A and 3B are disposed so as to face each other in the sheet body heat and press area P2, and a pair of hollow rollers 3A and 3B are arranged so as to face each other in the sheet body heat and press area P2, and a sheet body discharge path area P3. A roller 3 is formed, and heaters 5A and 5B are disposed in internal spaces 4A and 4B of the rollers 3A and 3B, respectively.

Note that in an apparatus for single-sided coating, one of the heaters 5A and 5B may be omitted. In the sheet body surface coating apparatus having such a configuration, the rollers 3A and 3B are heated from inside by the heaters 5A and 5B, respectively, and the sheet body 2 on which the plastic film 1 is stacked is coated along the sheet body movement path P. The plastic film 1 is transferred from the sheet body supply path area P1 to the sheet body heat and press area P2, and in this sheet body heat and press area P2, the plastic film 1 is heat and press bonded by the rollers 3A and 3B to form the sheet body 2.
The sheet body 2 is welded to cover both sides of the sheet body 2 and is discharged through the sheet body discharge path region P3. however,
In such a sheet body surface coating apparatus, in order to uniformly heat the surface of the sheet body 2 to be coated, the thickness of the rollers 3A and 3B is usually increased to obtain a large heat capacity. The temperature of the outer peripheral surfaces of rollers 3A and 3B is made to be uniform, so when using the device when the rollers 3A and 3B are in a cold state after a relatively long downtime such as at night, It takes a long time from the time when power is supplied to the heaters 5A and 5B to start their operation until the temperature of the outer circumferential surface of each of the rollers 3A and 3B reaches a temperature necessary to achieve sufficient surface coverage. This method requires a long time (for example, about 3 to 5 minutes) and therefore has a drawback that the waiting time is long.

In order to solve such drawbacks, for example, a method of heating the outer peripheral surfaces of the rollers 3A and 3B using radiant heat is considered to be effective.
Although it is possible to shorten the standby time by increasing the temperature of the outer circumferential surface of the roller relatively quickly, when the temperature of the entire roller has not yet risen, such as immediately after the start of use of the device, a large amount of heat may be transferred inside the roller. Since the heat is absorbed, it may not always be possible to apply the necessary amount of heat to the sheet body 2 in the sheet body heating and pressing region P2.

In addition, in order to coat the surface of the sheet body 2 at high speed, it is necessary to further increase the temperature of the rollers 3A and 3B.
In this case, the sheet body 2 overlaid with the plastic film 1 suddenly undergoes a large temperature change,
The sheet body 2 after the surface coating treatment may end up being curved and deformed. The present invention has been made based on the above-mentioned circumstances, and aims to shorten the waiting time during use and achieve the desired surface coating treatment quickly and reliably without causing deformation of the sheet body. One object of the present invention is to provide a sheet body surface coating device that can coat the surface of a sheet body. In order to achieve this object, in the present invention, a sheet body moving path in which a sheet body on which a plastic film is overlapped moves, which consists of a sheet body supply path area, a sheet body heat-pressing area, and a sheet body discharge path area, is provided. a pair of rollers that are provided along the sheet body heating and pressing region and forming pinch rollers that face each other; and an outer circumferential surface of at least one of the pair of rollers that rotates toward the sheet body heating and pressing region. A heat radiation lamp is provided facing the area and facing the sheet body supply path area, and a part of the radiant heat from the heat radiation lamp is irradiated onto the sheet body moving in the sheet body supply path area. In this way, the sheet body surface coating device is constructed.

An embodiment of the present invention will be described below with reference to the drawings.

In one embodiment of the present invention, as shown in FIG.
A pair of rollers 3A and 3B are disposed so as to face each other via a sheet body heating and pressing region P2 in a sheet body movement path P to constitute a pinch roller 3, and the pinch roller 3 is configured to face each outer circumferential surface of the rollers 3A and 3B. For example, thermal radiation lamps 6A and 6B such as Nowagen lamps and infrared lamps are provided. Here, the positions of these heat radiation lamps 6A and 6B are the respective outer circumferential surface areas Q1 and Q of the rollers 3A and 3B that rotate toward the sheet body heating and pressing area P2.
2, and facing the sheet body supply path area P1.Then, each outer circumferential surface area of the rollers 3A and 3B other than the sheet body heat-pressing area P2 and the heat radiation lamp Reflective plates 7A and 7B made of aluminum, for example, are provided to cover the space where the reflective plates 6A and 6B are located to constitute the sheet body covering device.The reflective plates 8A and 8B are provided to cover the outer peripheral surfaces of the reflective plates 7A and 7B. The heat insulating layers 9A and 9B are cooling heat dissipation plates that partition a part of the sheet body discharge path region P3.

In the above configuration, the thermal radiation lamps 6A and 6
The rollers 3A and 3B are heated by the radiant heat from B, and the sheet body 2 on which the plastic film 1 is overlapped, which is transported along the sheet body movement path P, is first exposed to the heat radiation in the sheet body supply path region P1. After being preliminarily heated by the radiant heat from the lamps 6A and 6B, the sheet is heated and pressed by the rollers 3A and 3B in the heating and pressing area P2, but immediately after the heat radiation lamps 6A and 6B are turned on (for example, (after about 3 seconds have elapsed), the rollers 3A and 3B are placed in the area P immediately before the sheet body heating and pressing area P2.
Since the heating occurs in the outer circumferential surface areas Q1 and Q2 that rotate toward the sheet body, it takes a short time to reach the sheet body heating and compression bonding area P2, and the temperature drop is slight even if there is, and the sheet body heating Sheet body 2 reaching crimping area P2
has already been preheated, the sheet body heating and pressing area P2
Since the outer circumferential surface temperature required for the rollers 3A and 3B may be slightly lower, the device should not be used after a relatively long rest time, that is, when the rollers 3A and 3B are cold. When starting the process, the waiting time until a sufficient sheet surface coating device can be achieved can be significantly shortened.

Furthermore, since the sheet body 2 on which the plastic film 1 is stacked is preheated by the radiant heat from the thermal radiation lamps 6A and 6B before reaching the sheet body heat and press bonding area P2, it is natural that the sheet body 2 on which the plastic film 1 is stacked is preheated in the sheet body heat and press bond area P2. The amount of heat that the rollers 3A and 3B should give to the sheet body 2 may be reduced, and the sheet body 2 will end up being heated in two stages and will not undergo a sudden large temperature change. The sheet body 2 is not deformed in a curved manner, and as a result, the sheet body coating process can be accomplished at high speed.

In addition, if the cooling heat sinks 9A and 9B are provided to partition the sheet body discharge path area P3 as in the illustrated example,
The entire sheet body after the surface coating treatment is gradually cooled, and curvature deformation at this point can also be prevented.

Here, one of the cooling radiation plates 9A and 9B may be provided so as to be able to move toward and away from the other, so that the sheet body 2 can surely come into contact with them. In addition to the above, since the sheet body 2 is preheated by a portion of the radiant heat from the heat radiant lamps 6A and 6B that does not directly contribute to heating the rollers 3A and 3B, the utilization rate of the total radiant heat is high. In the end, the energy consumption of the thermal radiation lamps 6A and 6B can be reduced.

Although the case where both sides of the sheet body 2 are covered has been described above, in the present invention, it is also possible to cover only one side.
In addition, if only one side is to be covered, use the thermal radiation lamp 6A or 6.
Only one of B may be provided. As can be understood from the above embodiments, the present invention provides sheet body movement in which a sheet body on which plastic films are stacked is moved, which is composed of a sheet body supply path area, a sheet body heat-pressing area, and a sheet body discharge path area. a pair of rollers that are provided along the sheet body heating and pressing area in the path and forming pinch rollers that face each other; and at least one of the pair of rollers rotates toward the sheet body heating and pressing area. A sheet comprising: a thermal radiation lamp arranged to face the outer peripheral surface area and face the sheet body supply path area, and a part of the radiant heat from the thermal radiation lamp moves through the sheet body supply path area. Since the structure is characterized by irradiating the body, the waiting time during use is short, and the desired surface coating treatment can be achieved quickly and reliably without causing deformation of the sheet body. It is possible to obtain effects such as low energy consumption.

[Brief explanation of the drawing]

FIG. 1 is an explanatory sectional view showing an example of a conventional sheet body surface coating apparatus, and FIG. 2 is an explanatory sectional view showing an embodiment of the sheet body surface coating apparatus of the present invention. 1...Plastic film, 2...
Sheet body, P1...Sheet body supply path area, P2
・・・・・・Shinote body heat compression bonding area, P3・・・・・・
・Sheet body discharge path area, P...Sheet body movement path, 3...Zench roller, 5A, 5B...
Heater, 6A, 6B... Heat radiation lamp, 7A
, 7B...Reflection plate, 9A, 9B... Cooling heat sink, Ql, Q2... Outer peripheral surface area.

Claims (1)

[Scope of Claims] 1. In the sheet body heating and pressing area in the sheet body moving path in which the sheet body on which the plastic film is overlapped moves, which consists of a sheet body supply path area, a sheet body heating and pressing area, and a sheet body discharge path area. a pair of rollers provided along the line and facing each other to constitute a pinch roller; and at least one of the pair of rollers faces an outer circumferential surface area that rotates toward the sheet body heat-pressing area, and and a thermal radiation lamp arranged so as to face the sheet body supply path area, and a part of the radiant heat from the thermal radiation lamp is irradiated onto the sheet body moving in the sheet body supply path area. Sheet body surface coating equipment. 2. The sheet body surface coating device according to claim 1, wherein at least a part of the sheet body discharge path area is partitioned by a cooling heat sink.